• 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:
    Crimping system (1) of a fastening component (5) on a support (6), comprising: - a crimping tool (2) having a housing (13) and a pull rod (12) configured to cooperate with the fastening component (5) so as to deform during a translation of the pull rod (12), - a source of a fluid (3) connected to the housing (13) for supplying the fluid under pressure in order to moving the pull rod (12), - a measuring means (30) for measuring the displacements of the pull rod (12), and - a detecting means (31) for providing information of a pressure setting of the fluid in the housing (13), and a control unit (4) configured to record a measured displacement curve and fluid pressurization information in the housing (13).
    公开号:FR3028783A1
    申请号:FR1461327
    申请日:2014-11-24
    公开日:2016-05-27
    发明作者:Frederic Simonet
    申请人:Bollhoff Otalu SA；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION The invention relates to the crimping of a fastening component on a support. State of the art A crimp fastener component is an assembly member for securing another part to a support, such as a screw, nut, or plate. In particular, the crimping component comprises a head and a deformable body to form a crimping bead so as to fix the component on the support, the crimping bead being intended to jam the support with the head of the component. The component may be a nut or a rivet. A nut is a threaded hollow piece, that is to say which has an internal thread, intended to be fixed to another threaded piece. A rivet is an assembly element of flat pieces. In general, the fastening components are crimped onto the supports before final assembly. Currently, the fastening components are crimped using a crimping tool that can be manually operated or mounted on a robot. In particular, some parts assembly lines can not be equipped with a robot and it is then necessary to use a manually operated crimping tool. Some assembly lines are modular to allow greater flexibility for complex assemblies and are less automated. This is the case, for example, where the operator must follow the progress of the assembly to perform its crimping operation.
    [0002] European patent application EP0995518 discloses a riveter for rivets provided with a mandrel, equipped with a device for automatically providing the rivets at one end of the riveter, and a container for collecting broken mandrels after a riveting operation. In addition, the riveter includes means for controlling a riveting cycle. In particular, the riveter comprises a hydraulic piston disposed in a housing and connected to jaws which allow the setting of the mandrel of a rivet, the piston being able to be moved in translation to tow the mandrel and deform the rivet. The riveter further comprises a hydraulic source 10 connected to the housing by a hydraulic passage, a mechanism for detecting the hydraulic pressure in the passage, and a controller connected to the detection mechanism and able to interrupt the hydraulic source when the hydraulic pressure drops to below a predetermined level indicative of a breakage of the mandrel. On the other hand, the riveter has means for detecting a passage of a mandrel in the tray and the controller stops the riveter when the passage of a mandrel is not detected after a certain time after detection of the mandrel. the breakout of the latter. But this automated system is complex and it only concerns rivets equipped with a mandrel. More particularly, it is not suitable for crimping nuts for which a threaded pull rod is used to deform the nut, the nut having no mandrel. European patent application EP0738550 discloses a system for installing a blind rivet and evaluating the acceptability of the installation, comprising a mechanism for grasping the rod of a mandrel of the rivet for towing it. , a first transducer for measuring the force on the rivet during the application, a second transducer for measuring the displacement of the traction mechanism, and a control circuit for determining, from the displacement and the force measured, the total energy used during the rivet installation and to compare it to a desired predetermined value. But the system is also complex and is not suitable for crimping nuts with no mandrel.
    [0003] OBJECT OF THE INVENTION An object of the invention is to overcome the disadvantages mentioned above, and in particular to provide simple means to control the crimping of a fastener component on a support to ensure good setting conditions of the component. According to one aspect of the invention, there is provided a crimping system of a fastener component on a support, comprising: - a crimping tool comprising a housing and a pull rod 15 configured to cooperate with the fastening component of so as to deform during a translation of the pull rod in the housing and along a longitudinal axis of the crimping tool, - a source of a fluid connected to the housing for supplying the fluid under pressure in the housing to move the pull rod, and 20 - a measuring means for measuring the movements of the pull rod The crimping system comprises a detecting means for providing information of a pressurization of the fluid in the housing, and a unit of control configured to receive the displacement measurements and the pressurization information and to record a measured displacement curve and the fluid pressurization information in the lo during the translation of the draw rod.
    [0004] The proposed system is particularly simple because it provides a minimum of useful information to control the quality of mounting of the fastener component on the support. In addition, such a system is suitable both for crimping rivets fitted with a mandrel and for crimping nuts pulled by a threaded pull rod. The control unit can be configured to stop the source of the fluid when a measurement of the displacement of the pull rod is strictly positive and the pressurizing information is zero.
    [0005] The control unit may be configured to stop the source of the fluid when a measurement of the displacement of the draw rod is zero and the pressurization information is strictly positive.
    [0006] The control unit may also be configured to stop the source of the fluid when a measurement of the displacement of the pull rod is greater than a maximum threshold. The control unit may further be configured to stop the source of the fluid when a maximum value of the measurements of the pull rod displacement is less than a minimum displacement threshold or greater than a maximum displacement threshold. The source of the fluid can be a hydraulic or pneumatic source.
    [0007] In another aspect, there is provided a method of crimping a fastener component on a carrier, comprising a crimping tool having a housing and a pull rod configured to cooperate with the fastener component so as to deform it during a translation of the pull rod 3028783 5 in the housing and along a longitudinal axis of the crimping tool, the method comprising the following steps: - supplying a fluid under pressure in the housing to move the pull rod, and 5 - measure the movements of the pull rod. The method further comprises the following steps: detecting a pressurization of the fluid in the housing, and recording a curve of the measured displacements and the fluid pressurization information in the housing during the translation of the rod. traction. The method may include a source for supplying the fluid and a step of stopping the fluid source when a measurement of the displacement of the pull rod is strictly positive and the pressurizing information is zero. The method may include a step of stopping the fluid source when a measurement of the displacement of the pull rod is zero and the pressurizing information is strictly positive. The method may further include a step of stopping the source of the fluid when a measurement of the displacement of the pull rod is greater than a maximum threshold.
    [0008] The method may also include a step of stopping the source of the fluid when a maximum value of the measurements of the displacement of the pull rod is less than a minimum displacement threshold or greater than a maximum displacement threshold.
    [0009] Other advantages and features will become more clearly apparent from the following description of particular embodiments of the invention given by way of nonlimiting example and represented in the accompanying drawings, in which: FIG. - Figure 1 schematically illustrates a sectional view of an embodiment of a crimping system of a fastener component; and FIG. 2 schematically illustrates a curve of the movements of the crimping tool pull rod as a function of time. DETAILED DESCRIPTION FIG. 1 shows a crimping system 1 comprising a crimping tool 15, a source of a fluid 3, and a control unit 4. The crimping system 1 serves to crimp a fastening component. The fastening component 5 may be a rivet with a mandrel, or a nut. Preferably, the fixing component 5 is a nut comprising a bearing head 7 and a deformable body 8, the deformable body 8 comprising an internal thread 9. The crimping tool 2 comprises a body 10 extending longitudinally along a longitudinal axis A, and a delivery nose 11 located at one end of the body 10. The crimping tool 2 further comprises a pull rod 12 disposed in a housing 13 of the body 10 of the tool 2. The rod of traction 12 is configured to be mechanically coupled with the fastening component 5. According to a preferred embodiment, the pull rod 12 comprises a section provided with an external thread 14 intended to cooperate with the internal thread 9 of the fastening component. 5 nut type. According to another embodiment, the pull rod 12 comprises jaws intended to cooperate with the mandrel of the fixing component 5 of the rivet type.
    [0010] In the preferred embodiment, the threaded portion 14 of the rod 12 is screwed into the internal thread 9 of the nut 5, in this way the movements and the forces made by the pull rod 12 are transferred to the component of FIG. The pull rod 12 also has a rear end 15, opposite the end including the threaded portion 14, mechanically coupled to a drive shaft 16. The drive shaft 16 and the pull rod 12 are arranged in the housing 13. The drive shaft 16 is driven in rotation and in translation, with respect to the longitudinal axis A, by a drive mechanism 17. The drive mechanism 17 comprises the source of the fluid 3, the housing 13 and a conduit 18 connecting the housing 13 to the source of the fluid 3 so as to bring the pressurized fluid into the housing 13. The fluid source 3 can be a hydraulic source to provide a liquid, for example In a variant, the fluid source 3 can be a pneumatic source for supplying a compressed gas, for example air, into the housing 13. When the drive 16 is rotated, it causes the rotation of the pull rod 12 around the longitudinal axis A, in particular to screw the rod 12 in the nut 5. When the drive shaft 16 is driven in translation it causes translation of the pull rod 12 along the longitudinal axis A, either towards the rear, that is to say in the direction opposite to the laying nose 11, or towards the front for return the pull rod 12 to its initial position. The rearward translation of the pull rod 12 pulls the fastening component 5 so as to deform it to form a crimping bead, which enables the crimping operation to be carried out. To cause the deformation of the fastening component 5, the delivery nose 11 is in contact with the bearing head 7 of the fastening component 5, and when the rod 12 is pulled backwards, the internal thread 9 of the deformable body 8 is close to the support head 7 of the component 5 and the deformable body 8 is deformed to form the crimping bead. The deformation of the nut 30 causes the formation of the crimping bead against the support 6 to wedge the latter with the bearing head 7. The pulling rod 12 is then unscrewed and the component 5 remains fixed to the support 6.
    [0011] The fluid source 3 is controlled by the control unit 4 configured to turn on or off the fluid source 3 in response to operator pressure on a trigger 19 of the crimping tool 2. crimping tool 2 may include a handle 20 for carrying the tool 2, when the tool is portable. Alternatively, the body 10 of the tool is mounted on an arm of a robot.
    [0012] The crimping tool 2 further comprises a measuring means 30 for measuring the displacements C of the pull rod 12, and a detecting means 31 for providing information of a pressurization of the fluid in the housing. 13. It is considered that the displacement C of the pull rod is zero when the pull rod 12 is in an initial position. When the rod 12 is moved in translation, forward towards the laying nose 11, or backwards in the opposite direction, it is considered that the displacement is strictly positive and the value of the displacement corresponds to the position of the rod. rear end 15 with respect to its initial position. By displacement value is meant the measured value of the displacement of the pull rod 12. The displacement measuring means 30 may be a position sensor, for example an inductive or capacitive sensor. The measuring means 30 measures in real time the position of the pull rod 12 during the crimping operation, i.e. the position information of the rod 12 is fed continuously to the 4. The detection means 31 may be a pressure switch which is activated when the fluid is under pressure in the housing 13. A pressure switch is adapted to detect the exceeding, by a predetermined value, of the pressure of a fluid. The detection means 31 makes it possible to supply pressurization information P of the fluid in the housing 13 to the control unit 4. This information is binary, which simplifies the crimping system 1. In effect, at the Unlike a sensor, such as the displacement measuring means 30, the detection means 31 only indicates whether the fluid pressure has exceeded a predetermined pressure threshold. In particular, the determined pressure threshold is greater than the pressure necessary to pull the rod 12 without the presence of the fastening component 5 to be crimped, that is to say when the pull rod 12 is screwed to any nut or when the jaws of the pull rod 12 do not grip any mandrels. Preferably, the determined pressure threshold is also less than the pressure necessary for crimping the fastening component 5 which requires a minimum of effort. The pressurizing information P of the fluid makes it possible to indicate to the control unit 4 that a crimping cycle is in progress, in other words that the drive mechanism 17 is under pressure. For example, the detection means 31 comprises a piston 32 actuated by the fluid present in the duct 18, and an electric contactor 33. The electric switch 33 makes it possible to detect a pressure in the housing 13 greater than the determined pressure threshold. In addition, a return spring 34 keeps the piston 32 in an initial position, where the electric switch is open and the pressurizing information P of the fluid in the housing 13 is zero. When the pressure of the fluid increases the piston 32 moves and compresses the return spring 34. Then, when the pressure of the fluid exceeds the determined pressure threshold, which is proportional to the stiffness of the spring 34, the piston 32 closes the electric contactor 33. The return spring 34 allows, in addition, a return to position of the piston 32 when the pressure of the fluid decreases and becomes less than the determined pressure threshold. The control unit 4 is configured to receive the displacement measurements C of the pull rod 12 and the pressurizing information of the fluid supplied by the measuring means 30 and the sensing means 31. of the pull rod 12 characterizes the deformation of the fastening component 5. Furthermore, the control unit 4 is configured to check the validity of the values of the displacement C of the pull rod 12 and the curve 5 of the displacements of the pull rod 12. In other words, the control unit 4 checks whether the crimping operation is compliant or not. The displacement curve is constructed from the displacement values during the crimping operation. The control unit 4 also records the values of the pressurizing information P of the fluid.
    [0013] The control unit 4 may comprise signaling means 35 for indicating whether the crimping operation is compliant or not, for example with respect to a reference curve. In addition, the control unit 4 records the curve of the values of the displacement of the pull rod 12 and the value of the pressurizing information P of the fluid, in the course of time during a crimping operation. It is considered that a crimping operation is compliant if at least one of the following conditions is valid: - there is no displacement of the traction rod (C = 0) before pressurization of the fluid in the housing (P = 0); - There is a displacement of the pull rod (C> 0) after obtaining the pressurization information of the fluid in the housing (P = 1); the measurements of the displacement of the traction rod (12) are less than a maximum displacement threshold C max; a maximum value MAX _C of the measured displacements C of the traction rod 12 is between a minimum displacement threshold Cmin and a maximum displacement threshold Cmax; - The curve of the movements of the pull rod 12 is consistent after a comparison with a reference curve. The reference C corresponds to the displacement of the pull rod 12; the reference P corresponds to the pressurization information of the fluid. Furthermore, the displacement C of the rod 12 is zero when the pull rod 12 is in its initial position, the displacement C is strictly positive when the pull rod 12 is in a position behind the initial position, it is in the opposite direction to the laying nose 11, and the displacement C is strictly negative when the pull rod 12 is in a position in front of the initial position, that is to say when the end rear 15 of the pull rod 12 is located between the initial position and the nose 11. The pressurizing information P of the fluid is, in turn, zero when the pressure of the fluid is less than or equal to the threshold of determined pressure, and it is equal to 15 "a" when the pressure of the fluid is strictly greater than the determined pressure threshold. The control unit 4 records the displacement curve of the pull rod 12. It can further determine the maximum value MAX_C of the measurements of the displacement of the pull rod 12 during the crimping operation. For example, the control unit 4 can compare the measured displacement values with the maximum displacement threshold Cmax and the minimum displacement threshold Cmin. The values of the thresholds Cmax, Cmin are set according to the type of the fastening component 5. On the other hand, the control unit 4 can compare the recorded curve with a reference curve when the crimping operation is completed. When comparing the recorded curve with a reference curve, the displacement curve is considered to be compliant when the dispersion of the measurements, with respect to the values of the reference curve, is consistent, that is to say that 12 measurements are within a specified range. The control unit 4 may emit a conformal crimp signal, using the signaling means 35, when all the conditions of conformity of the crimping operation mentioned above are valid.
    [0014] In FIG. 2, a curve 40 of the displacements C of the corresponding pull rod 12 is shown. FIG. 2 also shows the curve 41 of the pressurizing information P of the fluid during a conformal crimping operation. It may be noted that during a proper crimping operation, the pull rod 12 is translated backwards, and the displacement C is strictly positive and increases, and after the formation of the crimping bead, the pull rod 12 is unscrewed and the rod returns to its initial position, the displacement C remains positive and then decreases to zero. During a proper crimping operation, the pressurization P of the fluid in the housing 13 is detected at the moment when a positive displacement is measured. Then, the displacement evolves and the curve is recorded at the end of operation. The end of a crimping operation is determined when the pressurizing information P of the fluid changes from the value "one" to zero. When the end of the crimping operation is detected, the control unit 4 records the curves 40, 41. During the crimping operation, the control unit 4 compares the values of the displacement curve 40 with the thresholds maximum displacement Cmax and minimum Cmin. More particularly, the control unit 4 compares the maximum value MAX_C of the displacement curve 40 with the displacement thresholds Cmax, Cmin, and indicates whether the cycle is compliant, in particular by means of the signaling means 35. contrary, it is considered that a crimping operation does not comply if at least one of the following conditions is valid: - there is a displacement of the pull rod (C> 0) before a pressurization of the fluid in the dwelling (P = 0); - There is no displacement of the pull rod (C = 0) after obtaining the pressurization information of the fluid in the housing (P = 1); A measurement of the displacement of the traction rod (12) is greater than the maximum displacement threshold Cmax; the maximum value MAX_C of the measured displacements C of the traction rod 12 is less than the minimum displacement threshold Cmin or greater than the maximum displacement threshold Cmax; - The curve of the movements of the pull rod 12 is not consistent after a comparison with a reference curve. When at least one condition indicating a non-compliant crimping operation is valid, the control unit 4 stops the fluid source 3, in particular to stop the crimping tool 2 in order to avoid any risk of damage. In the case where there is a displacement of the traction rod (C> 0) before a pressurization of the fluid in the housing (P = 0), it is detected that the crimping is incomplete, or that there has been a crimping operation without fixing component mechanically coupled to the rod 12, or that the pull rod 12 has broken at the start of the crimping operation. In the case where there is no displacement of the traction rod (C = 0) after obtaining the information pressurized fluid in the housing (P = 1), there is a defect It is also considered that the crimping operation is not in conformity when the measurement of a displacement of the pull rod 12 is greater than the maximum displacement threshold C max, in this case the crimping is excessive. In addition, the crimping operation is not compliant when the maximum value MAX_C of the measurements of the displacement of the pull rod 12 is less than the minimum displacement threshold C min, in this case the crimping is insufficient. It is also considered that the displacement curve is not compliant when the measurements of the displacements C are outside the determined interval, that is to say that the dispersion of the measurements is not in conformity.
    [0015] The crimping process can be carried out by the crimping system 1 described above. The method comprises the following steps: - supplying a fluid under pressure, via the fluid source 3, into the housing for moving the pull rod 12, 10 - measuring, via the measuring means 30, the movements of the pull rod 12, - to detect, by means of the detection means 31, a pressurization of the fluid in the housing, and - to record, via the control unit 4, a curve measured displacements and fluid pressurization information in the housing during translation of the pull rod. The method may further include the steps of: stopping the source of the fluid when a measurement of the displacement of the pull rod is strictly positive and the pressurizing information is zero, and / or - stopping the source fluid when a measurement of the displacement of the pull rod is zero and that the pressurization information is strictly positive.
    [0016] The method may also include a step of comparing the recorded curve with a reference curve and a step of stopping the source of the fluid when the recorded curve is not consistent. Alternatively, the fluid source can be stopped when a maximum value MAX_C of the pull rod displacement measurements is less than a minimum threshold or greater than a maximum threshold. The crimping system and the method of controlling a crimping tool are particularly simple and suitable for any type of fastener components, particularly nuts and rivets.
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Crimping system (1) of a fastening component (5) on a support (6), comprising: - a crimping tool (2) having a housing (13) and a pull rod (12) configured to cooperate with the fastening component (5) so as to deform during a translation of the pull rod (12) in the housing (13) and along a longitudinal axis (A) of the crimping tool (2), - a source of a fluid (3) connected to the housing (13) for supplying the pressurized fluid into the housing (13) to move the pull rod (12), and - measuring means (30) for measuring displacements of the pull rod (12), characterized in that it comprises a detection means (31) for providing information of a pressurization of the fluid in the housing (13), and a control unit (4) configured to receive the displacement measurements and the pressurization information and to record a measured displacement curve and the setting information. in fluid pressure in the housing (13) during the translation of the pull rod (12).
    [0002]
    The system of claim 1, wherein the control unit (4) is configured to stop the source of the fluid (3) when a measurement of the displacement of the pull rod (12) is strictly positive and the Pressurization information is zero.
    [0003]
    The system of claim 1 or 2, wherein the control unit (4) is configured to stop the source of the fluid (3) when a measurement of the displacement of the pull rod (12) is zero and the Pressurization information is strictly positive. 3028783 17
    [0004]
    4. System according to one of claims 1 to 3, wherein the control unit (4) is configured to stop the source of the fluid (3) when a measurement of the displacement of the pull rod (12) is greater at a maximum threshold. 5
    [0005]
    5. System according to one of claims 1 to 4, wherein the control unit (4) is configured to stop the source of the fluid (3) when a maximum value of the measurements of the displacement of the pull rod (12). ) is less than a minimum displacement threshold (Cmin) or greater than a maximum displacement threshold (Cmax).
    [0006]
    6. System according to one of claims 1 to 5, wherein the source of the fluid (3) is a hydraulic source. 15
    [0007]
    7. System according to one of claims 1 to 5, wherein the source of the fluid (3) is a pneumatic source.
    [0008]
    8. Method of crimping a fastening component (5) on a support (6), comprising a crimping tool (2) having a housing (13) and a pulling rod (12) configured to cooperate with the component for fixing it (5) so as to deform during a translation of the pull rod (12) in the housing (13) and along a longitudinal axis (A) of the crimping tool (2), the method comprising the following steps: - supply a fluid under pressure in the housing (13) to move the pull rod (12), and - measure the displacements of the pull rod (12), characterized in that it comprises the steps following: - detect a pressurization of the fluid in the housing (13), and 3028783 18 record a measured displacement curve and fluid pressurization information in the housing (13) during the translation of the rod of traction (12). 5
    [0009]
    The method according to claim 8, comprising a source (3) for supplying the fluid and a step of stopping the source of the fluid (3) when a measurement of the displacement of the pull rod (12) is strictly positive and that the pressurization information is zero. 10
    [0010]
    The method of claim 9 including a step of stopping the source of the fluid (3) when a measurement of the displacement of the pull rod (12) is zero and the pressurization information is strictly positive. .
    [0011]
    The method of claim 9 or 10 including a step of stopping the source of the fluid (3) when a measurement of the displacement of the pull rod (12) is greater than a maximum threshold.
    [0012]
    12. Method according to one of claims 9 to 11, comprising a step of stopping the source of the fluid (3) when a maximum value of the measurements of the displacement of the pull rod (12) is below a threshold minimum displacement (Cmin) or greater than a maximum displacement threshold (Cmax).
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    同族专利:
    公开号 | 公开日
    US10307872B2|2019-06-04|
    MX366996B|2019-08-02|
    EP3023172A1|2016-05-25|
    MX2015016175A|2016-08-01|
    FR3028783B1|2016-12-09|
    US20160144466A1|2016-05-26|
    CA2911865A1|2016-05-24|
    BR102015029347A2|2016-08-09|
    CN105643243A|2016-06-08|
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    法律状态:
    2015-11-23| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-27| PLSC| Publication of the preliminary search report|Effective date: 20160527 |
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    申请号 | 申请日 | 专利标题
    FR1461327A|FR3028783B1|2014-11-24|2014-11-24|SYSTEM AND METHOD FOR CRIMPING A FIXING COMPONENT ON A SUPPORT|FR1461327A| FR3028783B1|2014-11-24|2014-11-24|SYSTEM AND METHOD FOR CRIMPING A FIXING COMPONENT ON A SUPPORT|
    EP15192693.8A| EP3023172A1|2014-11-24|2015-11-03|System and method for crimping an attachment component on a mounting|
    CA2911865A| CA2911865A1|2014-11-24|2015-11-10|System and method for crimping a fastening component on a support|
    US14/937,305| US10307872B2|2014-11-24|2015-11-10|System and method for crimping a fastening component on a support|
    MX2015016175A| MX366996B|2014-11-24|2015-11-24|System and method for crimping a fastening component on a support.|
    CN201511035961.7A| CN105643243A|2014-11-24|2015-11-24|System and method for crimping a fastening component on a support|
    BR102015029347A| BR102015029347A2|2014-11-24|2015-11-24|system and method for crimping a fastener into a bracket|
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