• 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:
    Procedure and system to ensure that a fixing means (3) prevents the displacement of a part (4) in requesting processes, such as for example machining processes. It allows obtaining a decision criterion through a safety factor (fds) to establish the applicability of the fixation system. It comprises the following stages: a) characterization of the maximum specifications of the fixing system through the measurement of the forces that give rise to the displacement of the piece; b) estimation and simulation of the forces that allow modeling completely the demands due to the process; c) definition of the failure criterion of the fixation system establishing a fds for decision making. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2684596A1
    申请号:ES201700317
    申请日:2017-03-29
    公开日:2018-10-03
    发明作者:Gustavo Carlos PELAEZ LOURIDO；Juan Francisco CANTANO BOYANO；Antonio FERNANDEZ ULLOA；Iván GAGO DOVAL；José María ALONSO LAGO；José Enrique ARES GÓMEZ
    申请人:Universidade de Vigo；
    IPC主号:
    专利说明:

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    DESCRIPTION
    Procedure and system to ensure that the fixation prevents the displacement of the piece in machining processes.
    Object of the invention
    The present invention is within any activity in which it is necessary to apply fixing to a piece, especially in the industrial manufacturing sector. In particular, it is considered as the main objective of the invention to establish a method for evaluating fixation systems before a specific solicitation. Therefore, the invention patent refers to a methodology to ensure the application of fixing devices to requesting processes, such as machining processes.
    Background of the invention
    Fixing devices can be classified generically into two types:
    Conventional fixing systems: These are devices that perform the fixing of elements by some kind of exclusively mechanical restriction. They have an extended use in all types of transformation processes. However, compared to unconventional, they have a series of disadvantages that discourage their use in applications that require great precision, flexibility or reduction of non-productive times.
    Unconventional fixing systems: These are defined as those devices that perform fixing by means of drive sources of a different nature than exclusively due to mechanical contact restriction elements. Among others, the following can be mentioned:
    • Vacuum fixing: the fixing is produced by the generation of vacuum in the interface between the part and the fixing device.
    • Magnetic fixing: The fixing force comes from the magnetic field generated in the fixing device.
    • Adhesive fixing: a layer of adhesive is applied between the workpiece and the fixing device.
    • Fixation by fusion of the coating: The piece is covered with a low melting point material. When heated, this coating melts so that, when solidified, the fixation occurs.
    The use of unconventional fixing systems in the industrial environment is not entirely efficient. To ensure safety, the capacity of the device is oversized, or the request is exercised below the maximum specifications that the devices offer. This inefficiency in the use, due to security reasons, can be improved through the knowledge of the real limits of these devices in each application, since the solicitations can also be very variable, depending on the type of operation and the components of the process. In general, unconventional fixing systems have better characteristics than conventional type, in that they allow to increase the performance of the process or the quality of the final manufactured products. You can cite certain characteristics that demonstrate these advantages:
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    • Better accessibility: they generally have fewer elements in their physical realization, which allows reducing the number of surfaces on which the fixation is exercised.
    • Flexibility, absence of specific tools: Commercial realizations of unconventional fixing systems can carry out their action in different ways and with different materials, without the need to modify tools or using simple accessories.
    • Reduction of preparation, fixation and release or untapping times: The absence of tooling or configuration changes allows the drastic reduction of preparation times.
    • Uniformity, greater precision: Unconventional fixation systems provide strong fixation on large surfaces, which causes local deformations to be minor.
    Description of the invention
    The present invention consists of a method and system for making better use of the fixing devices, achieving greater efficiency and taking advantage of the best properties of the unconventional compared to the conventional ones. This invention is focused mainly on the application of fixing devices in production processes such as forming processes, mainly machining processes.
    The field of application can be extended to the following areas:
    • Forming processes in general: The methodology can be applied to the fixing of parts in any type of forming process that requires it.
    • Conventional / unconventional fixation systems: The described methodology can be applied to fixation systems that use techniques considered as conventional, as unconventional.
    The invention is based on the existence of commercial products that implement the fixation and whose optimal use is not expressly available to the user. Thanks to the invention, the use of fixing systems can be ensured in suitable and optimal conditions for each application.
    The invention patent establishes a procedure that seeks to quantitatively determine the applicability of a given fixation system, that is, it allows to ensure that a fixation system can be used in a given "requesting process".
    - “Requesting process” means any process (of forming, treatment, maintenance or other type) that generates on the piece and, consequently, on the fixation device that keeps it immobilized, a mechanical request whose application transfers to the fixation to a state closer to failure than its previous state.
    - “Failure” is understood as the uncontrolled movement of the piece with respect to the position in which it was immobilized.
    The procedure, which establishes the present invention patent, comprises a methodology with the following steps:
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    a) Characterization of the specifications of the fixing systems, by means of valuation techniques of the maximum fixing requests, as well as the variables that influence them.
    b) Estimation and simulation of the solicitations exerted on the part-fixing system.
    c) Establishment of the fixing system failure criterion, by comparing the data obtained in the previous stages and defining a safety factor (fds) that quantifies whether or not the failure occurs, and the proximity of to happen. The criterion guarantees the correct fixation of the piece in a given machining operation and fixing system.
    In a preferred embodiment, the characterization of the fixing system specifications consists in the determination of the maximum fixing capacities of the system, through the use of measuring instruments. To characterize the fixation, that is, to establish its actual operating limits in an application, a force is gradually exerted on a particular control material that is immobilized by the fixation system until the failure occurs. The failure occurs when the piece moves a minimum, predetermined displacement, which the measuring device must appreciate thanks to its scale division and correct use. The choice of material and components will depend on each case and will be taken into account, in order to adjust the respectability and reproducibility of the tests, the variables that can vary the maximum force resulting on the interface between workpiece and fixing device.
    In a preferred embodiment, the estimation of the solicitations exerted on the fixing system comprises geometric modeling, analytical representation and computer simulation of the behavior of the forces generated by the requesting process.
    In a preferred embodiment, a safety factor (fds), a numerical parameter that allows the user to decide whether or not to apply the fixing system and with what security he can do so, is determined to evaluate the failure criterion of the fixing system. That is, the fds allows to establish a criterion of help to the decision making of the user to determine if the fixing system is acceptable, or not, and, therefore, to define the applicability of the same in a certain process. In addition, this factor, quantitatively indicates the ability to use this fixation for a given process, encompassing the various variables that influence it.
    To obtain the fds, a comparison of the maximum specifications of the fixing system, obtained in stage a), with the estimated solicitations due to the process, assessed in stage b) must be made.
    The fds quantifies the proximity of the fault, defined through the following equation:
    Z Moments F. M (F.)
    fds - interiors _______ '¡nt'
    Z FM Moment (F)
    'sun' applicants
    Where:
    • Z M (Finf), Moment of the internal forces: Moment that creates the fixing system, magnetic table for a preferred embodiment of the invention, in reaction to the forces generated by the requesting process. Of constant magnitude, it is determined by the characterization of the maximum force of the fixing system, which is carried out in stage a) of the methodology object of the invention patent.
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    • M (Fs0 |), Moment of the requesting forces: Moment produced by the forces due to the requesting action of the process. In a preferred embodiment of the invention is the sum of the moments created by each cutting edge of a milling cutter, in a planned / slotted operation. The magnitude of the cutting forces is obtained in step b) of the methodology object of the present invention patent.
    Another aspect of the present invention is a system to ensure that the fixation prevents the displacement of the part in machining processes used to capture the specifications of step a) of the patent procedure, which comprises the following elements:
    - a fixing means (3), for this preferred embodiment is a magnetic table consisting of magnetic poles (2) and located on the table (1) of a machine tool.
    - a square piece (4) centered with respect to the magnetic table poles (3) and fixed by it that will receive the test requests.
    - a load cell (10) to measure the force that is being applied to the piece (4) supported on fasteners consisting of two supports (11) that receive and transmit the solicitations.
    - an element for measuring the displacement (7) of the piece (4) with respect to the magnetic table (3) with its corresponding stem-probe (9) and support (8).
    - and a pushing element that is used to exert the force to the maximum that the magnetic table (3) can withstand in the direction and direction indicated in figure 1 and always exerted parallel to the plane of the tables (1, 3), and which in turn comprises a set of elements consisting of a support square (5), a nut (12) welded to the square (5) and a spindle (13) that by means of the rotation of a crank (6) It supplies the force to cause the fixing system to fail.
    In a preferred embodiment, the spindle can be driven mechanically, hydraulically, electrically or in any other way.
    In another preferred embodiment, the displacement measurement element may be comparator clock, laser systems, photoelectric devices, artificial vision systems, strain gauges or any other type of device that allows displacement measurement.
    The procedure and system established by this invention patent can be applied to any fixing system: mechanical, magnetic, pneumatic, adhesives, or any other type. It can be applied to any type of requesting process and on any material. It is a versatile procedure, generated from the application of static equations and the estimation of the solicitations of a process.
    Brief description of the drawings
    To complement the description made, a set of figures is included as an integral part of said description, where an illustrative and non-limiting character is depicted as a preferred embodiment which will be described in the following section.
    Figure 1.- Shows a view of the force application device for the characterization of the fixing system of a preferred application according to the present invention. Where:
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    1. Machine tool support table
    2. Magnetic pole of the fixing device
    3. Fixing medium: magnetic table
    4. Workpiece
    5. Support bracket for the thrust element
    6. Drive handle for thrust element
    7. Workpiece displacement measurement element (in this case it corresponds to a comparator clock)
    8. Support of the piece displacement measurement element
    9. Stem-probe of the displacement measuring element
    10. Load cell
    11. Load cell brackets
    12. Thrust element nut
    13. Thrust element spindle
    Figures 2 and 3. Geometric description of a requesting process of machining type with rotary tool: milling-grooving. Where the angle of position of the tool is a, the depth of cut is ap, the thickness of the chip is h, the feed per tooth of the milling cutter is fz and the width of the chip is y.
    Figure 4. Plan representation of a preferred embodiment of the milling type requesting process: grooving, with a tool of diameter D, and 90 ° tool position angle, where d is the angular position of a cutting edge.
    Figure 5. Representation in plan of the same preferred embodiment of the milling-grooving type requesting process, in which the forces acting on the part appear due to an edge located in the angular position d, Ft and Fr being the forces exerted by that edge in the tangential and radial direction, respectively, and Fx and F and its projections on the X and Y axes Lx and Ly are the dimensions of the piece measured on both axes.
    Figure 6. Graph in which they are represented according to Cartesian axes. According to the abscissa axis: the angle traveled by the mill in its turn. According to the ordinate axis, the sum of the solicitations considered in each static equation, both for Forces and for the Moments. Where:
    1 and 2.- represent the value taken by the sum of the requesting Forces of the cutting edges on the X and Y axes, respectively.
    3.- represents the sum of the moments, with respect to a reference point, in this case G, due to the requesting forces given by curves 1 and 2.
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    4. - represents the sum of Moments of the internal forces or forces due to the reaction of the magnetic plate in the X and Y directions, supposed concentrated in the center of the piece due to the centered position of the piece with respect to the poles of the magnetic table
    5 and 6.- represent the values of the internal forces on X and Y in the center of the piece.
    Preferred Embodiment of the Invention
    For a better understanding of the present invention, a preferred embodiment of the invention, shown in Figures 1 to 6, are set forth below, which should be understood without limitation of the scope of the invention.
    According to a preferred embodiment of the invention, it refers to a procedure to ensure that the fixation prevents displacement in operations where there are requesting processes comprising three stages: characterizing the specifications of the fixing systems, modeling the forces of the requesting process and determine applicability through a safety factor.
    Characterization of the fixing system specifications
    To perform the acquisition, the registration of the displacement and the force applied on the part-fixing interface, a microcontroller is used that is connected to a PC, where the experiences are recorded. The applied request is recorded at all times, as well as the displacement, to be able to characterize the fixing failure.
    According to a preferred embodiment of the invention, a system for characterizing the fixing device (figure 1) comprising:
    - A fixing means (3), for this preferred embodiment is a magnetic table consisting of magnetic poles (2) and located on the table (1) of a machine tool.
    - A square piece (4) centered on the poles of the magnetic table (3) and fixed by it that will receive the test request, a load cell (10) to measure the force that is being applied to the piece (4) supported on fasteners consisting of two supports (11) that receive and transmit the solicitations.
    - An element for measuring the displacement of the part (4) with respect to the magnetic table (3), which in this preferred embodiment is a comparator clock (7), with its corresponding stem-probe (9) and support (8).
    - A pushing element that is used to exert the force to the maximum that the magnetic table (3) can withstand in the direction and direction indicated in figure 1 and always exerted parallel to the plane of the tables (1, 3), and which in turn comprises a support square (5), a nut (12) welded to the square (5) and a spindle (13) that by means of the rotation of a crank (6) supplies the force to produce the failure of the fixation System.
    Request modeling
    The operation that supplies the forces in the preferred embodiment of this invention is a milling type machining process, in particular a planned and / or grooving operation
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    (Figures 3, 4 and 5). The modeling or estimation of the solicitations in turn comprises 2 phases: analytics and simulation.
    1. Analytical phase: the estimation of the forces that occur during milling is performed, using known values of the specific cutting pressure of the material, for example, those obtained in which it appears in the graphic of the tool catalog of cutting of the Sandvik Coromant brand (Reference of the internal publication of the company C-2900: 15 SPA / 01 © AB Sandvik Coromant 2015), which allows to calculate the tangential force at each moment of the cut.
    2. Simulation phase: allows correlations between the ratio of the radial force and
    F /
    the tangential force = Kr and the average chip thickness (h), thus stops
    be able to assess the radial force at every moment and the modeling of the requesting forces is completed.
    Determination of the applicability
    The fixing failure occurs at the moment when the piece begins to slide on the surface of the magnetic table. To identify when the fault occurs, the static conditions are applied to a rigid solid that is the part being machined. If the static equations are fulfilled, it is ensured that the piece will not move and, therefore, no fixing failure will occur as long as the sum of forces and moments is equal to 0.
    The sum of forces on the X and Y axes will be the sum of decompositions of the tangential and radial forces on each local coordinate system (on each cutter tooth of the milling cutter). These forces will be reciprocal of the maximum value that the reactions exerted by the magnetic table can take.
    Where:
    Z Fx = Z (Fi • YES 0i) - (F ■ C0S)
    Fmx = 0; (EC.X)
    Z Fy = Z (Fi • C0Sdi) + (Fn • C0sdi)
    F
    my
    0; (Ec.2)
    Verifying Fmx = Fmy = F; (Ec.3)
    mm
    • Fti in N, tangential force of the edge i.
    • Fr¡ in N, tangential force of the edge i.
    • Fmx, Fmy, F in N, reaction force of the table characterized in the phase of
    mm
    specification of the fastening system and assumption centered on the geometric center of the piece.
    • The subscripts x and y refer to the projections of the forces on the X and Y axes.
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    • The subscript i refers to each of the teeth that are acting.
    • 0, in degrees, indicates the position of each tooth with respect to the point where it enters to cut (figures 4 and 5).
    Considering an angle of position of the edge (a) of 90 °, according to figures 2 and 3, these forces, tangential and radial, will be calculated respectively according to the following equations:
    - kc1, in N / mm2, is the specific cutting pressure for the material used and the chip thickness (hm) of the operation that appears in the graphic of the Sandvik Coromant brand cutting tools catalog (Publication reference company internal C-2900: 15 SPA / 01 © AB Sandvik Coromant 2015).
    - ap, in mm, depth of pitch or axial engagement of the milling operation, as shown in figures 2 and 3.
    - mc, data of the slope of the line that appears in the graphic of the Sandvik Coromant brand cutting tools catalog (Reference of the internal publication of the company C-2900: 15 SPA / 01 © AB Sandvik Coromant 2015).
    - Y0 in degrees, is the angle of orthogonal cutting detachment, that is the angle measured in the plane perpendicular to the cutting edge between the face of the tool and perpendicular to the cutting speed or perpendicular to the worktable. For the preferred embodiment, y0 = 0 ° is taken.
    To establish the criterion when applying the equation of Z M = 0 we must consider the most unfavorable situation. To do this, moments must be taken with respect to the furthest point from the place where the tooth is making the cut. This point would be the first on which the static equations would cease to be fulfilled and, therefore, would mark the beginning of the piece fixing failure. That is to say, point G in Figure 5 would be the first one where the equilibrium ceased to be fulfilled, given that:
    • We assume that the magnetic table offers uniform forces in all positions and, therefore, can offset the same moment at all points on its surface.
    • In G, the moment of the forces exerted by the cut is the maximum because this is the arm of each force in which the cut requests are broken down in the axes of the table plane (figure 5).
    At the remaining points, the arms are smaller and, therefore, the occurrence of the fault is defined by the moment in which the equation Z M = 0 is not fulfilled at point G.
    image 1
    image2
    Where:
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    Thus, the equation sum of moments would be as follows:
    Vm = V (F. ■ r + F ■ r) - F ■ L - F ■ L = 0; (Ec.6)
    v xi Fxi yi Fy and mx ^ my ^ ’V 7
    F mx = Fmy = F; (Ec.7)
    Where:
    - F in N, is the maximum force that is able to communicate the table to the piece,
    mm
    characterized in step a) of the methodology of the present invention patent in its preferred embodiment.
    - Lx and Ly are the dimensions of the piece in the corresponding directions. without#; (Ec.8)
    without#; (Ec.9)
    x e y are the coordinates of the center of the mill with respect to the reference point that is one of the corners of the piece, in our case the point G, and D is the diameter of the mill. The subscripts indicating the teeth of the milling cutter that are being cut at all times have been omitted in Figures 4 and 5 to simplify the notation in the figures.
    The applicability criterion of the preferred embodiment therefore requires the characterization of the table through the determination of F, which comes from a certain combination of
    mm
    device / material / surface quality, as well as the assessment of specific cutting pressures and geometric considerations of workpiece and tool.
    Therefore, in order to establish the failure criterion, we can reduce the complexity of the problem by determining which of the three equations ceases to be fulfilled first and, therefore, configures the most restrictive of the limits. For this, the values obtained for the three equations and the limits corresponding to each one are represented graphically (Figure 6).
    To obtain the failure criterion in the preferred embodiment, the following technological machining parameters are applied:
    r. = y +
    D
    D
    r = x + -
    2
    yi
    2
     Vc (m / min)  aD (mm) fz (mm / rev)
     55  1 0.1
     55  1 0.15
     55  1 0.17
     55  1 0.19
     55  1 0.2
     55  1 0.22
     55  2.25 0.1
     55  1.5 0.2
     55  2 0.14
     55  2.25 0.13
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    Part material: Udisholm AISIH13 steel tempered to 52HRC.
    Strawberry. Sandvik R828.2-100-30. Effective detachment angle 0 °.
    Insert Sandvik TPKN 2204PDR 4230, completely smooth by the detachment face.
    The forces and moments of each tooth are first calculated by varying the position angle of the tooth and finally these values are added for all the teeth they are cutting. In the case of the preferred embodiment, a planned / slotted pass along the Y axis of the machine in its positive direction is taken as a reference (Figure 4).
    In the graph (Figure 6), the values taken by the static restrictions for a preferred embodiment of the patent are represented. Analyzing the figure, it is obvious that the one that is closest to stop being fulfilled is the condition of IM = 0, since the curve of the sum of moments of the requesting forces is close to that of the moments due to the internal forces of the magnetic table than any of the sum of forces. Therefore, only compliance with condition I M = 0 should be checked.
    With the data obtained for this preferred embodiment, you can establish a criterion to help the user make a decision to determine if the fixation is finally acceptable or not and, therefore, define the applicability of the system in a given process, based on a safety factor (fds).
    This factor quantifies the proximity of the fault and is defined by the following equation:
    £ Moments F ... M (F.t)
    íj. _ interior _ v mi /
    £ Moment F ..... M (F.)
    sohcitantss V sol J
    Where:
    - Moment of the requesting forces, M (Fsn¡): Moment produced by the forces due to the requesting action of the chip removal process, located in each tooth.
    - Moment of the internal forces, M (Fn): Moment that creates the magnetic table against the solicitations produced by the process of chip removal. It has a constant magnitude due to the maximum force that the magnetic table, previously characterized, can withstand.
    Thus, the safety factor (fds) varies around the unit, defining three areas of operation for fixing, which constitute the applicability criteria.
    fds <
    > 1 if M (F = 1 if M (F <1 if MF
    nt)> MF so,) safe zone int) = MF so,) intermediate zone »int) <MF sol) safe zone ^
    Then, for the preferred embodiment, the validation of the forecasts made under the criteria developed by carrying out a series of practical experiences is carried out.
    Also, depending on the validation, an indicative value is established for the additional fds, although the user can define another based on their needs but in no case
    eleven
    it may be less than the fds that identifies the optimum operating area of the magnetic table, which in the case of the preferred embodiment is of the order of 1.2-1.3. Eventually, and at the user's discretion, a wider margin can be added for greater security by opting for conditions that limit the requesting requirement and that, therefore, will affect the objective of the invention patent presented here that is none other than the to maximize the overall performance of the requesting process.
    The applicability determination model is valid both to define whether a fixing device can carry out a given operation, and to determine which are the 10 most demanding cutting conditions that allow the fixing system to be applied.
    权利要求:
    Claims (11)
    [1]
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    1. Procedure to ensure that the fixation prevents the displacement of the piece in machining processes, which includes at least the following stages:
    a) Characterize the specifications of the fixing systems, by modeling techniques of the maximum fixing specifications, as well as the variables that define them.
    b) Estimate and simulate the solicitations exerted on the fixing device-part system.
    c) Define a failure criterion of the fixing system by comparing the data obtained in the previous stages and defining a safety factor (fds), quantify the proximity of the fault to ensure proper fixing to the part, operation of machining and fixing system given.
    [2]
    2. Method according to claim 1, characterized in that the modeling techniques of the maximum fixing specifications in step a) comprise establishing the operating limits of the device and which will depend on the material, component and form of the test to be performed, as well as the acquisition of all the influence variables such as the values of the unraveling force that vary the maximum force resulting on the interface piece and fixing device.
    [3]
    3. The method according to claim 2, wherein the acquisition of data on the values of the unraveling force is characterized by the use of a microcontroller that will collect and transmit the data to a computer to keep a record of the experiences.
    [4]
    4. Method according to claim 1, characterized in that the estimation of the stresses on the fixing device and the part in step b), due to the machining process, comprises, in turn, two phases:
    - An analytical phase that consists in calculating the forces that occur during machining, by using known values of the specific cutting pressure of the material to calculate the tangential force at each moment of the cut.
    - A simulation phase of machining experiences to obtain values of the quotient Kr = Fr / Ft, between the radial force Fr and the tangential force Ft and the average chip thickness h, to estimate the radial force, Fr, at each moment and , consequently, fully model the forces of the chip removal process.
    [5]
    5. Method according to any of claims 1 to 4, characterized in that in the definition of the fixing system failure criterion and definition of the safety factor (fds) in step c), it comprises a criterion of help to the user to define the applicability of a fixing system in a certain machining process. To obtain (fds) a comparison is made of the maximum specifications of the fixing system obtained in stage a) with the solicitations estimated in stage b) quantifying the proximity of the fault, defined through the following equation:
    £ FM moments (F)
    __________________________________ interiors _ l______nt s
    £ Moment F rt¡b M (F)
    • í_— applicants l sol s
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    Where M (Fso) is the moment of the requesting forces and M (Fln) the moment of the internal forces.
    [6]
    Method according to claim 5, characterized in that the fds value varies in a range between:
    fds <
    > 1 if M [F = 1 if MF
    <1 if MF
    M)> MF sJ safe zone lnt) = MF so /) intermediate zone »
    nt) <MF so) safe area.
    Defining three areas of operation to ensure the fixation that constitutes the applicability criterion.
    [7]
    7. System to ensure that the fixation prevents the displacement of the piece in machining processes, according to claims 1 to 6, characterized in that it comprises the following elements:
    - a fixing means (3), for this preferred embodiment is a magnetic table consisting of magnetic poles (2) and located on the table (1) of a machine tool.
    - a square piece (4) centered with respect to the magnetic table poles (3) and fixed by it that will receive the test requests.
    - a load cell (10) to measure the force that is being applied to the piece (4) supported on fasteners consisting of two supports (11) that receive and transmit the solicitations.
    - a displacement measuring element (7) of the part (4) with respect to the magnetic table (3) with its corresponding rod (9) and support (8).
    - and a pushing element that is used to exert the force to the maximum that the magnetic table (3) can withstand in the direction and direction indicated in figure 1 and always exerted parallel to the plane of the tables (1, 3), and which in turn comprises a set of elements consisting of a support square (5), a nut (12) welded to the square (5) and a spindle (13) that by means of the rotation of a crank (6) It supplies the force to cause the fixing system to fail.
    [8]
    8. System according to claim 7, wherein the spindle (13) is characterized by being operated mechanically, hydraulically, electrically or any other type.
    [9]
    9. System according to claim 7, wherein the displacement measuring element (7) is characterized by being a comparator clock, or by strain gauges, laser systems, photoelectric devices, artificial vision systems, or any other device that allows Displacement measurement.
    [10]
    10. Use of the method and system according to any of the preceding claims, characterized in that it can be applied to the different fixing systems such as mechanical, magnetic, pneumatic, adhesives, and any other type.
    [11]
    11. Use of the method and system according to any of the preceding claims which extends its application over any type of machining operation and any process
    Applicant, as well as any type, shape and material of machining tool and any type, shape and part material.
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    同族专利:
    公开号 | 公开日
    ES2684596B2|2019-05-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4013932A|1975-10-06|1977-03-22|Cincinnati Milacron Inc.|Apparatus for controlling a magnetic clamp|
    DD122429A1|1975-11-11|1976-10-05|
    US4804914A|1985-02-13|1989-02-14|Odesskoe Skb Spetsialnykh Stankov|Method for determining force characteristic of a device for magnetically holding workpieces|
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