• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a manual drilling device comprising: - a drill body (1, 1 ') housing at least one output shaft (6) rotatably mounted, a pneumatic motor (4) connected to said output shaft (6 ) to drive the latter in rotation, an electronic tag reader (100); at least one tool holder (2, 2 ', 2 ") intended to be reversibly secured to said drill body (1, 1'), said tool holder (2, 2 ', 2") comprising securing means (23) a rotating cutting tool (200), transmission means connecting said cutting tool (200) rotating to said output shaft (6), and an electronic tag (101) carrying at least one identifying information of said tool cutting (200); said device further comprising: means for determining (201) at least one piece of information representative of the utilization rate of said cutting tool (200) carried by said tool holder (2, 2 ', 2 "), said means for determination being configured to record in said electronic tag (101) said information representative of the rate of use of said cutting tool (200), and - supply means of said determining means (201), said feeding means comprising a generator electric current (9) driven by said motor (4).
    公开号:FR3025125A1
    申请号:FR1458211
    申请日:2014-09-02
    公开日:2016-03-04
    发明作者:Emmanuel Martineau；David Herault
    申请人:Georges Renault SAS；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE DISCLOSURE The field of the invention is that of the design and manufacture of drilling tools more commonly known as drills.
    [0002] More specifically, the invention relates to drills comprising a pneumatic motor. 2. PRIOR ART Pneumatic drills are commonly used in various industrial sectors to make holes in various mechanical parts and varied. This is particularly the case in the aviation industry where drills are used to drill holes in aircraft structures. The desire to reduce as much as possible the mass of certain mechanical systems, such as aircraft in particular, induces the need to use more and more frequently composite materials for their manufacture. Complex composite structures are thus more and more often used, such as, for example, structures composed of an aluminum layer, a carbon fiber layer and a titanium layer. The drilling of such composite structures necessitated the design of new types of drill bits. These drills have the particularity of having a level of wear difficult to measure with the naked eye. However, the use of a drill bit used to make a hole in a complex composite material structure leads to the generation of geometrical defects in the pierced structures. It is therefore essential to know the level of wear of a drill. For this purpose, automatic drilling units have been equipped with a cycle counter to be able to evaluate the level of wear of a drill bit and to replace it after a period of operation. or a number of drilling cycles parameterizable. In the case of manual drills also called portable drills, to which the present invention relates and which are used in particular when the space at which a drilling must be made is not large enough to be able to use an automatic drilling unit , tracking the level of wear of the drills is much more complex. This complexity is essentially due to two reasons. Manual drills are compact, in particular for ergonomic reasons: this induces that the available space is insufficient to implant in the drill a cycle counter. The head of a hand drill consists of a removable tool holder which is fixed a cutting tool such as a drill, which tool holder is likely to be detached to be secured to another drill. Alternatively, the drill may be attached directly to the head of a drill and detached therefrom to be positioned on another drill. As a result, it is difficult to determine the operating time of a drill bit. Monitoring the duration of use of a drill is therefore complex. 3. Objectives of the invention The object of the invention is in particular to provide an effective solution to at least some of these various problems. In particular, according to at least one embodiment, an object of the invention is to provide a manual pneumatic drilling device which makes it possible to recognize the cutting tool used during a drilling operation. Another objective of the invention is, in at least one embodiment, to provide such a device that makes it possible to collect at least one piece of information representative of the level of wear of a cutting tool. In particular, the object of the invention is, according to at least one embodiment, to provide such a drilling device which makes it possible to determine the number of drilling cycles of a cutting tool. More specifically, an object of the invention is to provide, in at least one embodiment, such a device which makes it possible to determine the number of drilling cycles of a cutting tool whose duration and during which the speed of rotation of the cutting tool are greater than respective minimum values. Another object of the invention is, according to at least one embodiment, to provide such a drilling device that allows to determine the running time of a cutting tool.
    [0003] Another object of the invention is to provide, in at least one embodiment, such a drilling device which makes it possible to determine the number of times the torque transmitted to the cutting tool and the speed of the drill exceed predefined limit values.
    [0004] Another object of the invention is, according to at least one embodiment, to provide such a piercing device which is reliable and / or effective and / or simple in design. 4. PRESENTATION OF THE INVENTION For this, the invention provides a manual drilling device comprising: a drill body housing at least one output shaft rotatably mounted, a pneumatic motor linked to said output shaft for driving it in rotation, and an electronic tag reader; at least one tool holder adapted to be reversibly secured to said drill body, said tool holder comprising means for securing a rotary cutting tool, transmission means connecting said rotary cutting tool to said output shaft, and a label electronic device carrying at least one identification information of said cutting tool; said device further comprising: means for determining at least one piece of information representative of the rate of use of said cutting tool carried by said tool holder, said determining means being configured to record in said electronic tag said information representative of the rate of use of said cutting tool, and means for supplying said means for determining at least one piece of information representative of the utilization rate of said cutting tool, said supply means comprising an electric current generator driven by said motor. Conventional pneumatic drills are not in essence powered by electric power. In contrast, the pneumatic drill body according to the invention is provided with an electric current generator 3025125 4 connected to the rotor of the pneumatic motor of the drill. Thus, when the drill is running, a voltage is produced locally. The technique according to the invention then makes it possible to integrate into the body of the piercing device an electronic tag reader fed by the generator generating an electric voltage whose value is proportional to the rotation frequency of the motor. The drilling device also incorporates means for determining at least one piece of information representative of the rate of use of the cutting tool secured to the tool holder carrying an electronic tag containing at least one identification information of the cutting tool. These determination means still make it possible to record the information representative of the rate of use of the cutting tool in the electronic tag. Therefore, the technique according to the invention makes it possible: to identify precisely the tool holder attached to the drill, and by extension the cutting tool, for example a drill, secured to it thanks to the information contained in the electronic tag; measuring and calculating quantities relative to the rate of use of said cutting tool, for example a drill, during a drilling cycle; read the usage rate magnitudes already present in the electronic tag, allow for cumulation with the magnitudes of the last drilling cycle, and write it in the tag. and thus to know the level of wear of the cutting tool. According to a variant, said determining means comprise means for counting the starting number of said engine.
    [0005] Thus, each start is likened to a drilling cycle of the cutting tool, the counting of the number of drilling cycles to have a fairly reliable representation of the rate of use of the cutting tool. According to a variant, said means for counting the starting number of said motor are configured to record in said electronic tag the number of starts of said motor whose duration and / or at which the rotation frequency of said motor are greater than predetermined threshold values. It is thus possible not to count out unexpected starts which do not correspond to the implementation of an effective drilling cycle, and thus to improve the reliability of the determination of the utilization rate of the cutting tool. According to a variant, said determination means comprise means for counting the drilling cycle time of said cutting tool carried by said tool holder.
    [0006] In this case, the time of use of the cutting tool is used as information representative of the rate of use of the cutting tool. This also makes it possible to have a fairly reliable representation of the rate of use of the cutting tool. According to a variant, said means for counting the operating time of said cutting tool carried by said tool holder are configured to record in said electronic tag the times of the drilling cycles whose duration and / or during which the rotation frequency of said motor are greater than predetermined threshold values. It is thus possible not to count the unwanted drilling cycles whose duration is short and does not correspond to the implementation of an effective drilling cycle. This improves the reliability of the determination of the rate of use of the cutting tool. According to a variant, said determination means comprise means for evaluating at least one piece of information representative of the cutting work provided by said cutting tool. In this case, the cutting work provided by the cutting tool is used as information representative of the rate of use of the cutting tool. This also makes it possible to have a fairly reliable representation of the rate of use of the cutting tool.
    [0007] According to one variant, said evaluation means comprise means for measuring the air pressure at the inlet of said engine, means for measuring the air pressure at the output of said engine, means for measuring determining the difference between the values of the pressures at the inlet and the outlet of said engine, means for determining the torque supplied to the tool cutting by the engine from said pressure difference, means for determining the rotary frequency of said cutting tool, means for calculating the cutting energy from the rotation frequency of the cutting tool and the torque supplied to the cutting tool.
    [0008] This makes it possible to determine in a simple and efficient manner the cutting energy supplied to the cutting tool. According to a variant, said means for evaluating the cutting energy are configured to record in said electronic label the cutting energies of the drilling cycles whose duration and / or during which the rotation frequency of said motor is greater than predetermined threshold values. It is thus possible not to count the unwanted drilling cycles in which the cutting energy supplied to the cutting tool is low and does not correspond to the implementation of an effective drilling cycle.
    [0009] This improves the reliability of the determination of the use rate of the cutting tool. According to a variant, a device according to the invention comprises means for storing a portion of the energy produced by said generator. It is thus possible to store locally produced energy to ensure, when necessary, the determination of the rate of use of the cutting tool. According to a variant, said electronic tag is of RFID type. According to a variant, said pneumatic motor comprises a rotor, said generator comprising a multipolar magnet integral with said rotor as well as coils mounted on a fixed printed circuit placed opposite said magnet.
    [0010] The invention also relates to a method for determining the utilization rate of a cutting tool carried by a tool holder reversibly secured to the body of a drilling device comprising a pneumatic motor, an electronic tag reader. means for determining at least one piece of information representative of the utilization rate of said tool and means for supplying said determination means comprising an electric current generator driven by said motor, said tool holder comprising an electronic tag comprising at least one identifying information of said tool, said method comprising at least: a step of generating electric current by means of said generator; a step of supplying said determination means with said electric current; A step of determining at least one piece of information representative of the utilization rate of said tool; a step of recording in said electronic tag of said information representative of the utilization rate of said tool. 5. List of Figures Other features and advantages of the invention will appear on reading the following description of a particular embodiment, given by way of a simple illustrative and nonlimiting example, and the appended drawings among which: FIG. 1 illustrates an exploded view of a drilling device according to the invention; - Figure 2 illustrates a perspective section of a tool holder and the front end of a drill body according to the invention; - Figure 3 illustrates a partial perspective view in section of a drill body according to the invention; FIG. 4 illustrates a simplified diagram of a method according to the invention. 6. Description of particular embodiments 3025125 8 6.1. First embodiment: counting number of starts 6.1.1. Architecture In connection with FIGS. 1 to 3, an exemplary embodiment of a drilling device according to the invention is presented.
    [0011] As shown in these figures, such a piercing device comprises: a drill body 1 or 1 ', and a tool holder 2 or 2' or 2 "The drill body may for example be of the handle type 10 (reference 1 in Figure 1) wherein the handle 10 extend along an axis inclined relative to the rest of the body.It may alternatively have a longitudinal shape (reference 1 'in Figure 1), the handle 10' then extends in the extension of the rest of the body.A tool holder 2, 2 ', 2 "is secured to the front end of the drill body 1 by reversible fastening means 3. Tool doors 2, 2' 2 "of different shapes may alternatively be secured to the drill body 1, 1 'It may for example be a tool holder 2 90 ° angle head type (axis of rotation of the cutting tool perpendicular to the axis of rotation of the motor), a tool holder 20 2 'of axis return type (rotational axis cutting tool parallel and remote from the axis of rotation of the motor), or from a 2 "tool holder of angle head type to more than 90 ° (axis of rotation of the cutting tool forming an angle more than 90 ° with the axis of rotation of the motor) or other. This drill body 1, 1 'houses motor means which here comprise a pneumatic motor 4. It comprises at its rear end connection means 5 to a compressed air supply network. The drill body 1 houses an output shaft 6 which is connected to the shaft 71 of the rotor 7 of the pneumatic motor 4 by means of a gear transmission (s) epicyclic (s) 8.
    [0012] The tool holder 2 comprises a casing 20 inside which is housed a shaft 21 mounted to rotate. The rear end 22 of this shaft 21 has a shape complementary to that of the output shaft 6 of the drill body so that when they cooperate with each other, they are connected in rotation. Other types of transmission means could of course be implemented. The tool holder 2 also comprises a drill clamp 23 which is connected to the front end of the shaft 21 by means of a transmission 24 housed in the housing 20. These elements are known to those skilled in the art and are not described in more detail here. The drill body 1, 1 'comprises at its front end a hollow inner housing 11 provided for housing the end of a tool holder.
    [0013] The reversible joining means 3 are well known in the state of the art. Their purpose is to allow the quick attachment or disassembly of two tooling elements, in this case a tool holder and a drill body. These two tooling elements comprise a connection interface of the male-female type. The interface may be cylindrical or extruded with a hexagonal section, one of the elements including the female portion of the interface and the other element the male portion. Immobilization in translation and in rotation of the male part in the female part is obtained by blocking balls integral with the female part, in holes perpendicular to the interface formed in the female part, in a position such that the center balls are at the interface and protrude into locking housings in the male part. Thus a separation effort of the two parts solicits the balls in shear. The female element carries a locking ring allowing the operator to act on the balls to separate the two parts by translating the ring 25 along its axis. In this embodiment, these reversible securing means 3 comprise: a locking ring 30; locking balls 31; 30 - locking housings 32.
    [0014] The locking balls 31 are housed in holes 110 formed in the peripheral contour of the hollow inner housing 11, along axes substantially perpendicular to the axis of rotation of the motor. The locking receptacles 32 are formed at the periphery of the casing 5 20. The locking ring 30 comprises an inner portion of large diameter 300 and an inner portion of small diameter 301 connected by a frustoconical portion 302. It is mounted to move in translation on along the drill body 1, 1 'between a locking position and a release position. A compression spring 33 acts on the locking ring 30 to maintain it in its locking position. The locking balls 31 are movable between: - a locked position, taken when the locking ring is in its locking position, in which the small diameter portion 301 of the locking ring 30 acts on the locking balls 31 so as to when a tool holder cooperates with the drill body 2, the locking balls 31 are housed in the locking receptacles 32 to hold the tool carrier and the drill body integral, and - a release position, that it is possible to take them when the locking ring is in its release position, in which the locking balls are in the extension of the large diameter portion 300 of the locking ring 30 so that they can come out at least in part of the hollow inner housing and locking housing 32 to allow uncoupling of the tool holder and the drill body. When a tool holder cooperates with the drill body, its rear end is inside the hollow inner housing 11 and the end 22 of the shaft 21 cooperates with the end of the output shaft 6. The Drill body 1, 1 'houses an electric generator 9.
    [0015] This generator 9 comprises a multipolar magnet 90 integral with the rotor 7 of the pneumatic motor 4, as well as coils 91 mounted on a printed circuit 93 fixed 93 placed facing the magnet 90. It makes it possible to produce an electric current whose voltage is proportional to the rotational speed of the motor. It thus provides a dual function of electrical current generator and tachometer (indication of the frequency of rotation of the motor).
    [0016] The drill body 1, 1 'houses an electronic tag reader 100. This reader 100 is housed in the bottom of the hollow inner housing 11 coaxially with the output shaft 6. It is thus protected from the environment. outside. The drill body 1, 1 'houses a central unit 201, for example a microprocessor. This CPU is connected to the output of the generator 9 so that it can supply electricity. The electronic tag reader includes an antenna and is connected to the central unit. It allows not only to read the information stored in an electronic tag, but also to record data. In other words, it can communicate bidirectionally with an electronic tag. The tool holder comprises an electronic tag 101 which conventionally comprises a memory and an antenna. This electronic label 101 is placed at the end of the tool holder intended to be housed inside the hollow inner housing 11. It is placed coaxially with the axis of the shaft 21. electronic label and the electronic label are positioned, when the tool holder is secured to the drill body, in the axis of the output shaft 6. The electronic tag 101 is for example of the RFID type. It includes a memory for storing data. It contains at least one identifying information of the cutting tool 200 secured to the tool holder which it is secured. The antennas are, in this embodiment, coaxial coils.
    [0017] In this embodiment, the central unit is programmed to count the number of cycles of drilling performed by the cutting tool secured to the tool holder. A drilling cycle begins with a motor start. The starting of the engine is accompanied by the generation of power by the generator. The CPU is thus programmed to detect the moment at which the generator begins to produce power. This moment is considered as the start of a drilling cycle. Its detection thus makes it possible to detect a new drilling cycle.
    [0018] The central unit is also programmed to control the recording in the electronic tag via the reader of the number of drilling cycles performed. For this, it adds to the number of drilling cycles, if any, already recorded in the label each new drilling cycle it detects. The label associated with a tool holder carrying a cutting tool thus contains the number of cycles of holes made by it. During the manipulation of the piercing device, it is possible that the operator puts it under way unexpectedly without effectively realizing a drilling cycle. The recording of the nuisance starts as a drilling cycle in the electronic tag 20 would therefore lead to the accuracy of the information on the rate of use of the cutting tool being inaccurate. To overcome this drawback, the central unit may alternatively comprise a clock and be programmed to measure the duration of the current drilling cycle, compare it to a minimum threshold value and to increment the number of drilling cycles recorded. in the electronic tag of the current cycle only when the minimum threshold value is reached. Alternatively, the central unit can be programmed to deduce from the voltage of the current produced by the generator, the rotation frequency of the motor and therefore that of the cutting tool, compare it to a minimum threshold 30, and not add to the number of drilling cycles recorded in the electronic tag the current cycle only when the minimum threshold value is reached. These two alternatives could also be combined. The frequency of rotation of the generator whose rotor is linked to the rotor 5 of the air motor is such that: Nm = Ko.T With: Ko constant specific to the generator Nm motor rotation frequency, in rd / s 10 T voltage delivered by the generator, in V The frequency of rotation of the drill is such that: Nf = R.Nn, With: R ratio of the reduction of the drill (R <1) 6.1.2. Operation To perform a drilling operation, an operator is secured to the drill body 1, 1 'the tool holder 2, 2' or 2 "having the shape and bearing the drill adapted to the operation it must perform. it places the locking ring 30 in its release position 20 and then inserting the rear end of the tool holder in the hollow inner housing 11 until the rear end 22 of the shaft 21 cooperates with the front end of the the output shaft 6. It then releases the locking ring 30 which returns to its locking position under the effect of the force of the compression spring 33. The small diameter portion 301 then acts on the locking balls 31 to place them in the locking recesses 32 formed on the surface of the housing 20 of the tool holder, the tool holder is thus secured to the drill body, the piercing device is connected to the compressed air supply network. operat After pressing the start trigger of the piercing device, the motor 4 is rotated. When the motor 4 rotates, it not only causes rotation of the cutting tool secured to the tool holder via the chain of transmission between the rotor 3025125 14 of the motor and the drill bit. It also causes the generator 9 to rotate. In the case of a step 40, this generator then produces electric current that supplies power to the central unit. This corresponds to a step 41 for supplying means for determining at least one piece of information representative of the utilization rate of the cutting tool. The current output by the generator 9 gives information on the state of operation of the drill: production of current: the drill is running; no power output: the drill is stopped; The voltage generated by the generator is proportional to the rotational speed of the motor. The central unit detects the instant at which the generator begins to produce current, this instant being considered as a start of a drilling cycle.
    [0019] The central unit then controls the registration in the electronic tag, by means of the electronic tag reader which communicates with the tag via the antennas, the number of drilling cycles performed. For this, it adds to the number of drilling cycles already recorded in the electronic tag the new drilling cycle it detects. The tag reader 20 is powered by the generator via the central unit. This corresponds to a step 42 of determining information representative of the utilization rate of the tool, in this case the starting number of the drilling cycle, and to a step 43 of recording in the electronic tag of the information representative of the utilization rate of the tool.
    [0020] Once the drilling is completed, the operator releases the start trigger and the motor stops as well as the generation of power by the generator. When a new drilling cycle is implemented, it is detected by the central unit and the number of drilling cycles recorded in the electronic tag is incremented. The electronic tag thus contains the number of 30 drilling cycles of the cutting tool carried by the tool holder which it is secured. The operator can detach the tool holder and replace it with another to perform another drilling operation. The number of drilling cycles of the cutting tool carried by this new tool holder is likewise recorded in the electronic tag associated therewith. These tool holders can be successively secured to one or more piercing devices. In any event, the electronic tag it carries will contain information representative of the number of drilling cycles of the cutting tool carried by the tool holder. It is thus possible to know precisely the number of drilling cycles of a cutting tool. This can then be replaced after a number of predetermined threshold drilling cycles is reached.
    [0021] The electronic tag may contain information representative of the number of limit drilling cycles of the cutting tool carried by the tool holder which it is secured. The central unit may then compare this threshold value with the value of the number of drilling cycles of the cutting tool and issue an alarm or transmit information of another form, for example visual information, indicating that the cutting tool must be replaced, when the number of cumulative drilling cycle becomes greater than this threshold value. When the cutting tool integral with a tool carrier is replaced, the data stored in the corresponding electronic label will be reset in a manner known to those skilled in the art.
    [0022] In the variant for not counting the unwanted cycles, the central unit measures the duration of the current drilling cycle, compares it with a minimum threshold value and does not order the addition of the current drilling cycle in the label. only when the minimum threshold value is reached. Alternatively, the central unit deduces from the voltage of the current produced by the generator the rotation frequency of the motor and thus that of the cutting tool, compares it with a minimum threshold, and does not control the addition of the drilling cycle. in the electronic label only when the minimum threshold value is reached. These two alternatives can also be combined. In this case, the addition of the current cycle in the electronic tag 30 assumes a double condition. 6.2. Second embodiment: measurement of the time of use 6.2.1. Architecture In this second embodiment, the time of use of the cutting tool 3025125 will be used as information representative of the rate of use of a cutting tool. The architecture of a screwing device according to this second embodiment will be identical to that according to the first embodiment except that the central unit will comprise a clock, the device will comprise a storage capacity 204 of a part. generator energy, and the CPU will be programmed to: detect the start of drilling cycles that correspond to the times when the generator begins to produce power; Measuring the duration of each piercing cycle; order the addition in the electronic label of the duration of the drilling cycle which has just ended in the cumulative cycle duration which is recorded there. When it is desired not to count down the unwanted cycle times, the central unit may also be programmed to compare the duration of the drilling cycle with a minimum threshold value and not to add in the electronic tag the duration of the cycle. this cycle only when the minimum threshold value is reached. In addition or alternatively, the central unit may be programmed to deduce from the voltage of the current produced by the generator, the motor rotation frequency and therefore that of the cutting tool, compare it with a minimum threshold, and add the cycle time in addition or alternatively only when the minimum threshold value is reached. 6.2.2. Operation The operation of a screw device according to this second embodiment is identical to that according to the first embodiment, except that for each drilling cycle, the central unit: detects the moment when the generator starts to produce current, which is the moment when the cycle starts; measures the duration of the drilling cycle; 3025125 17 controls the addition in the electronic label of the duration of the drilling cycle which has just ended the cumulative cycle time which is counted therein. After stopping the engine, the CPU utilizes the energy stored in the capacity during the pierce cycle to complete the cycle time measurement and control whether or not the electronic tag count for that duration of time. cycle. In the variant for not counting the unwanted cycle times, the central unit compares the cycle time to a minimum threshold value and adds in the electronic tag the duration of this cycle only when the minimum threshold value is reached. The central unit may furthermore or alternatively deduce from the voltage of the current produced by the generator, the rotation frequency of the motor and therefore that of the cutting tool, compare it to a minimum threshold, and add the cycle time further or alternatively only when the minimum threshold value is reached. In these cases, the CPU uses the energy stored in the capacity during the drilling cycle to complete the measurement of the cycle time, if necessary calculate the motor rotation frequency, compare the cycle time and / or the frequency of rotation of the motor to the corresponding minimum threshold values, and control or not the addition in the electronic tag of the duration of the drilling cycle which has just ended. Furthermore, it may be indicated that the cutting tool carried by the tool holder is to be replaced by means of an alarm or display no longer based on reaching a threshold value of the number of drilling cycles but based on the achievement of a piercing cycle time threshold value. 6.3. Third embodiment: measurement of cutting work 6.3.1. Architecture In this third embodiment, the value of the cutting work done by the cutting tool will be used as information representative of the rate of use of the cutting tool. The architecture of a screwing device according to this third embodiment will be identical to that according to the second embodiment except that the piercing device will further comprise a sensor 202 for measuring the air pressure. engine power supply and a sensor 203 for measuring the exhaust air pressure of the engine. It will also include a tool memory for storing drill device data for calculating cutting energy. In addition, the CPU will be programmed to: detect when the generator begins to produce power, which is when the cycle starts; Measuring the pressure of the supply air of the engine; measure the exhaust air pressure of the engine; determine the torque supplied to the cutting tool by the engine from the previously measured pressures; measure the value of the voltage generated by the generator; Determining the speed of rotation of the cutting tool according to the voltage of the current generated by the generator; determining the cutting energy supplied to the cutting tool during the drilling cycle from the torque supplied to the cutting tool by the motor and the rotational speed of the cutting tool; Controlling the addition in the electronic tag of the cutting energy of the drilling cycle which has just ended at the cumulative cutting energy of the preceding cycles which is counted therein. The torque supplied to the cutting tool by the motor is determined as follows.
    [0023] The torque of a pneumatic paddle motor of constant geometry follows the following evolution: Cm = Ki.4P-K2.Nn-, 2 Cn-, useful torque available on the drive shaft, in Nm AP difference pressure pressure between the input and the output of the engine 3025125 19 constant K1 and K2 specific to the geometry of the engine, the coefficients of friction of the internal components of the engine, including paddles on cylinder and rotor. Cf The torque available on the drill for drilling, in other words the torque supplied to the cutting tool by the motor, is deduced from the following formula: Cf = IA.CNIR With: p. transmission efficiency of the drill between the motor and the drill bit R ratio of the reduction of the drill (R <1) The speed or rotation frequency of the cutting tool is determined in the following manner. The frequency of rotation of the generator whose rotor is connected to the rotor of the pneumatic motor is such that: Nm = Ko.T 15 With: Ko constant specific to the generator Nm motor rotation frequency, in rd / s T electric voltage delivered by the generatrix, in V The frequency of rotation of the drill is such that: 20 Nf = R.Nn-, With: R ratio of the reduction of the drill (R <1) The cutting energy is determined in the following way . The instantaneous power developed by the drill, in Pf, is such that: Pf = Cf.Nf The work Wf during a drilling cycle, in J, can be evaluated as follows: ## EQU1 ## and t1 being the start and end times of the drilling.
    [0024] An approximation Waf of this value Wf can be calculated from the average torque and rotation frequency Caf and Naf Waf = Caf. Naf When it is desired not to count the cutting energies of the unwanted cycles, the central unit may also be programmed to measure the duration of the drilling cycle, compare its duration to a minimum threshold value and not add in the electronic tag the cutting energy of this cycle only when the minimum threshold value is reached. In addition or alternatively, the central unit may be programmed to deduce from the voltage of the current produced by the generator, the rotation frequency of the motor and therefore that of the cutting tool, compare it with a minimum threshold value, and add the cutting energy of the cycle further or alternatively only when this minimum threshold value is reached. 6.3.2. Operation The operation of a screw device according to this third embodiment is identical to that according to the first or second embodiment, except that for each drilling cycle, the central unit: detects the moment when the Generator begins to produce power, which is the moment when the cycle starts; 20 measures the pressure of the supply air of the engine; measures the exhaust air pressure of the engine; determines the torque supplied to the cutting tool by the engine from the previously measured pressures as explained in the previous paragraph; 25 measures the value of the voltage generated by the generator; determines the speed of rotation of the cutting tool according to the voltage of the current generated by the generator as explained in the previous paragraph; determines the cutting energy supplied to the cutting tool during the drilling cycle from the torque supplied by the motor and its rotational speed as explained in the previous paragraph; 3025125 21 controls the addition in the electronic label of the cutting energy of the drilling cycle which has just ended at the cumulative cutting energy of the previous cycles which is counted therein. When it is desired not to count the cutting energies of the unwanted cycles, the central unit may also be programmed to measure the duration of the drilling cycle, compare its duration to a minimum threshold value and not add to the Electronic tag cuts the energy of this cycle only when the minimum threshold value is reached. In addition or alternatively, the central unit may be programmed to deduce from the voltage of the current produced by the generator, the rotation frequency of the motor and therefore that of the cutting tool, to compare it with a minimum threshold value, and add the cutting energy of the cycle in addition or alternatively only when the minimum threshold value is reached. Furthermore, it may be indicated that the cutting tool carried by the tool holder 15 is to be replaced by means of an alarm no longer based on reaching a threshold value of the number of piercing cycles or on reaching a drilling cycle duration threshold value, but on reaching a drilling energy threshold value. The recording of extreme values of drilling torque, drilling duration or others may be used to ensure a more characteristic tracking of the cutting tool. Thus, exceeding a given rotational speed or a given torque for a significant period of time may indicate that the tool has worked in conditions outside the recommendations of the suppliers. The recording of these overruns may thus be a reason for alerting the operators. 6.3. Other Benefits Placing the electronic tag on the tool holder rather than on the cutting tool simplifies the structure of the cutting tool, which is a wear part, to re-use the conventional drill clamp structure when the cutting tool is a drill, and accordingly reduce the costs. Placing the electronic tag on the tool holder, that is to say on an element that is reused almost infinitely, also makes it possible to reduce the consumption of electronic tags and thus the costs. The implementation of a generator on a pneumatic portable drill makes it possible to have a source of current production in local space that is not bulky, whereas the space available does not allow in particular the installation of an electric battery, and thus to be able to integrate in a pneumatic tool an electronic tag type technology. The implementation of a current generator driven by the motor of the drill also makes it possible to have a reversal representative of the rotation of the motor (rotation of the motor, absence of rotation of the motor, rotation frequency of the motor which is proportional to the intensity of the current delivered by the generator).
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Manual drilling device comprising: a drill body (1, 1 ') housing at least one output shaft (6) rotatably mounted, a pneumatic motor (4) connected to said output shaft (6) for driving it in rotation, an electronic tag reader (100); at least one tool carrier (2, 2 ', 2 ") intended to be reversibly secured to said drill body (1, 1'), said tool carrier (2, 2 ', 2") comprising securing means ( 23) of a cutting tool (200) rotating, transmission means connecting said cutting tool (200) rotating to said output shaft (6), and an electronic tag (101) carrying at least one identification information of said cutting tool (200); said device further comprising: means for determining (201) at least one piece of information representative of the utilization rate of said cutting tool (200) carried by said tool holder (2, 2 ', 2 "), said means for determining being configured to record in said electronic tag (101) said information representative of the rate of use of said cutting tool (200), and means for supplying said determining means (201) with at least one information representative of the rate of use of said cutting tool (200), said power supply means comprising an electric current generator (9) driven by said motor (4).
    [0002]
    2. Device according to claim 1, wherein said determining means comprise means for counting the starting number of said motor (4). 3025125 24
    [0003]
    3. Device according to claim 2, wherein said counting means of the starting number of said motor (4) are configured to record in said electronic label (101) the number of starts of said engine (4) whose duration and / or wherein the frequency of rotation of said motor (4) is greater than predetermined threshold values.
    [0004]
    4. Device according to any one of claims 1 to 3, wherein said determining means comprises means for counting the drilling cycle time of said cutting tool (200) carried by said tool holder 10 (2, 2 ', 2 ").
    [0005]
    An apparatus according to claim 4, wherein said running time counting means of said cutting tool (6) carried by said tool holder (2, 2 ', 2 ") is configured to record in said electronic tag (101) the times of the drilling cycles whose duration and / or during which the rotation frequency of said motor (4) are greater than predetermined threshold values.
    [0006]
    6. Device according to any one of claims 1 to 5, wherein said determining means comprise means for evaluating at least one piece of information representative of the cutting work provided by said cutting tool (200).
    [0007]
    7. Device according to claim 6, wherein said evaluation means comprise means (202) for measuring the air pressure at the inlet of said motor (4), means for measuring (203) the air pressure at the outlet of said motor (4), means for determining the difference between the values of the pressures at the inlet and the outlet of said motor (4), means for determining the torque supplied to the cutting tool (200) by the motor (4) from said pressure difference, means for determining the rotational frequency of said cutting tool (200), means for calculating the cutting energy from the rotation frequency of the cutting tool (200) and the torque supplied to the cutting tool (200). 5
    [0008]
    8. Device according to claim 7, wherein said means for evaluating the cutting energy are configured to record in said electronic tag (101) the cutting energies of the drilling cycles whose duration and / or during which the rotation frequency of said motor (4) are greater than predetermined threshold values. 10
    [0009]
    9. Device according to any one of claims 4 to 8, comprising means for storing (204) a portion of the energy produced by said generator. 15
    [0010]
    10. Device according to any one of claims 1 to 9, characterized in that said electronic tag (101) is RFID type.
    [0011]
    11. Device according to any one of claims 1 to 10, characterized in that said pneumatic motor (4) comprises a rotor (7), and in that said generatrix (9) comprises a multipolar magnet (90) integral with said rotor (7) as well as coils (91) mounted on a printed circuit board (93) fixed facing said magnet (90).
    [0012]
    12. A method of determining the utilization rate of a cutting tool carried by a tool holder reversibly secured to the body of a drilling device comprising a pneumatic motor, an electronic tag reader, determining means. (201) at least one information representative of the utilization rate of said cutting tool (200) and means for supplying said determining means (201) comprising a generator of electric current driven by said motor, said tool holder Comprising an electronic tag comprising at least one identifying information of said tool, said method comprising at least: a step (40) of generating electric current by means of said generator; A step (41) of feeding said determining means (201) with said stream; a step (42) of determining at least one piece of information representative of the utilization rate of said tool; a step (43) of recording in said electronic tag of said information representative of the rate of use of said tool.
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    同族专利:
    公开号 | 公开日
    FR3025125B1|2017-03-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2613267A1|1987-03-30|1988-10-07|Toyoda Machine Works Ltd|TOOL HOLDER WITH TIME OF SERVICE CONTROL|
    JP2003025177A|2001-07-11|2003-01-29|Incs Inc|Tool management system|
    EP1339014A1|2002-02-21|2003-08-27|Big Daishowa Seiki Co., Ltd.|RFID-tags holding unit|
    WO2009076496A2|2007-12-11|2009-06-18|Kennametal Inc.|Cutting tool with integrated circuit chip|
    US20140048605A1|2012-08-14|2014-02-20|Stanley Black & Decker, Inc.|Electronic identifier attachments for bits|FR3043579A1|2015-11-13|2017-05-19|Fives Machining|MODULAR MULTIPURPOSE PORTABLE MACHINE AND METHOD OF LATCHING AND UNLOCKING A REMOVABLE MODULE|
    EP3501745A1|2017-12-22|2019-06-26|Etablissements Georges Renault|Method for determining the damage to a rotating tool, and corresponding device|
    EP3492178A4|2016-07-28|2020-03-25|Hitachi Systems, Ltd.|Rotary atomizing head, rotary atomizing head managing system, and rotary atomizing head managing method|
    GB2583784A|2019-08-06|2020-11-11|Black & Decker Inc|3D printed shield for power tools|
    EP3939727A1|2020-07-17|2022-01-19|Etablissements Georges Renault|Portable device for drilling or screwing comprising a clamping collar for a removable tool head|
    法律状态:
    2015-09-24| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-04| PLSC| Search report ready|Effective date: 20160304 |
    2016-09-27| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-27| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-26| PLFP| Fee payment|Year of fee payment: 6 |
    2020-09-25| PLFP| Fee payment|Year of fee payment: 7 |
    2021-09-24| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1458211A|FR3025125B1|2014-09-02|2014-09-02|PNEUMATIC DRILLING DEVICE WITH ELECTRICITY GENERATING MEANS|FR1458211A| FR3025125B1|2014-09-02|2014-09-02|PNEUMATIC DRILLING DEVICE WITH ELECTRICITY GENERATING MEANS|
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