A tension control apparatus, method, device, and storage medium for a wire saw machine

Abstract

The application provides a tension control device, method, apparatus and storage medium of a wire cutting machine, and relates to the technical field of the wire cutting machine. The tension control device comprises a tension component, a detection component and a control component. The tension component is connected to the electrode wire to adjust the tension of the electrode wire. The tension component comprises an adjusting base, a first in-out wire roller and a second in-out wire roller rotatably arranged on the adjusting base, a tension roller movably arranged on the adjusting base, and a tension motor connected to the tension roller. The tension motor is used to drive the tension roller to move close to or away from the first in-out wire roller and the second in-out wire roller. The detection component is connected to the electrode wire to measure the tension of the electrode wire. The detection component comprises a measuring base, a measuring roller movably arranged on the measuring base, and a strain gauge connected to the measuring roller. The control component is electrically connected to the strain gauge and the tension motor. The application realizes accurate tension control through feedback.

Description

Technical Field

[0001] The present invention relates to the technical field of wire-cutting machine tools, and in particular to a tension control device, method, apparatus and storage medium for a wire-cutting machine tool. Background Art

[0002] Wire EDM machines are mainly used to process various complex and precise workpieces, such as punches, dies, convex-concave dies, fixed plates, stripper plates, etc. of blanking dies. They have outstanding advantages such as small machining allowance, high machining precision, short production cycle and low manufacturing cost.

[0003] The tension of the electrode wire in the wire-cut EDM machine will affect the processing quality. If the tension is too high, the electrode wire is prone to breakage. If the tension is too low, stripes and drum shapes may appear on the processed surface.

[0004] Traditional wire-cut EDM machines use a gravity hammer tension control method, which uses position feedback and is an open-loop control system. This means that for a given weight (i.e., the gravity hammer), a specific actual tension is output. A limitation of gravity hammer tension control is its poor disturbance resistance.

[0005] In view of this, the applicant filed this application after studying the existing technology. Summary of the Invention

[0006] The present invention provides a tension control device, method, apparatus and storage medium for a wire cutting machine tool to improve at least one of the above technical problems.

[0007] First,

[0008] An embodiment of the present invention provides a tension control device for a wire cutting machine tool, which includes: a tension component, a detection component and a control component.

[0009] The tension assembly is coupled to the electrode wire to adjust its tension. The tension assembly includes an adjustment base, first and second inlet and outlet rollers rotatably mounted on the adjustment base, a tension roller movably mounted on the adjustment base, and a tension motor coupled to the tension roller. The tension motor drives the tension roller toward or away from the first and second inlet and outlet rollers.

[0010] The detection component is connected to the electrode wire to measure the tension of the electrode wire. The detection component includes a measurement base, a measurement roller movably configured on the measurement base, and a strain gauge connected to the measurement roller.

[0011] The control assembly is electrically connected to the strain gauge and the tension motor. The control assembly includes a processor, a memory, and a computer program stored in the memory. The computer program can be executed by the processor to perform the following steps:

[0012] Get the measured values ​​of the strain gauge.

[0013] According to the measured value, the actual tension value is obtained based on the pre-built tension correction function.

[0014] Get the target tension value.

[0015] According to the difference between the actual value and the target tension value, the linear speed of the tension motor is corrected.

[0016] Second aspect,

[0017] An embodiment of the present invention provides a tension control method for a wire cutting machine tool, which includes:

[0018] Get the measured values ​​of the strain gauge.

[0019] According to the measured value, the actual tension value is obtained based on the pre-built tension correction function.

[0020] Get the target tension value.

[0021] According to the difference between the actual value and the target tension value, the linear speed of the tension motor is corrected.

[0022] Thirdly,

[0023] An embodiment of the present invention provides a tension control device for a wire cutting machine tool, comprising:

[0024] The measurement module is used to obtain the measurement value of the strain gauge.

[0025] The correction module is used to obtain the actual tension value according to the measured value based on a pre-built tension correction function.

[0026] Target module, used to obtain the target tension value.

[0027] The correction module is used to correct the linear speed of the tension motor according to the difference between the actual value and the target tension value.

[0028] Fourthly,

[0029] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the tension control method of the wire cutting machine tool as described in any paragraph of the second aspect.

[0030] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0031] The tension control device in this embodiment of the present invention applies constant reverse tension to the wire electrode through a tension assembly. Furthermore, a detection assembly mounted on the wire feed system continuously monitors the wire electrode tension, achieving precise tension control through feedback. This results in excellent control of wire tension variations and vibration. Furthermore, the wire feed system ensures accurate positioning and prevents streaks and bulging during finishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is an axonometric view of the tension assembly.

[0034] Figure 2 This is an exploded diagram of the tension component.

[0035] Figure 3 This is an equivalent schematic diagram of the tension control device of the wire cutting machine tool

[0036] Figure 4 It is an axonometric view of the detection component.

[0037] Figure 5 This is an exploded view of the detection component.

[0038] Figure 6 This is a curve chart showing the percentage reduction in tension fluctuation amplitude when the tension control device of the wire cutting machine tool is compared with the gravity hammer control method.

[0039] Figure 7 It is a flow chart of the tension control method of the wire cutting machine.

[0040] Figure 8 It is a structural diagram of the tension control device of the wire cutting machine tool.

[0041] Markings in the figure: 1-tension motor, 2-motor output end, 3-first inlet and outlet roller, 4-second inlet and outlet roller, 5-tension roller, 6-first pressure roller, 7-second pressure roller, 8-roller mounting shaft, 9-bearing, 10-bearing base, 11-roller end cover, 12-measuring roller, 13-strain seat, 14-strain gauge. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Example 1

[0044] See also Figures 1 to 6 A first embodiment of the present invention provides a tension control device for a wire cutting machine tool, which includes a tension component, a detection component and a control component.

[0045] The tension assembly is connected to the electrode wire to adjust the tension of the electrode wire. Figure 1 and Figure 2 As shown, the tension assembly includes an adjustment base, a first inlet and outlet roller 3 and a second inlet and outlet roller 4 rotatably disposed on the adjustment base, a tension roller 5 movably disposed on the adjustment base, and a tension motor 1 coupled to the tension roller 5. The tension motor 1 is used to drive the tension roller 5 toward or away from the first inlet and outlet roller 3 and the second inlet and outlet roller 4.

[0046] The detection component is connected to the electrode wire to measure the tension of the electrode wire. Figure 4 and Figure 5 As shown, the detection assembly includes a measurement base, a measurement roller 12 disposed on the measurement base, and a strain gauge 14 coupled to the measurement roller 12. Preferably, the detection assembly also includes a strain seat 13 disposed on the measurement base. Strain gauge 14 is disposed on strain seat 13. The tension sensor using strain gauge 14 can effectively measure the pressure of the wire electrode on the measurement roller 12, thereby obtaining the wire electrode tension.

[0047] The control component is electrically connected to the strain gauge 14 and the tension motor 1. The control component includes a processor, a memory, and a computer program stored in the memory. The computer program can be executed by the processor to perform steps S1 to S4.

[0048] S1. Obtain the measurement value of the strain gauge 14.

[0049] Specifically, measuring the tension of a steel wire using a strain gauge 14 type tension sensor is a prior art technique. Since the electrode wire is similar to the steel wire, using a strain gauge 14 type tension sensor to measure the tension of the electrode wire is a conventional technique known to those skilled in the art.

[0050] S2. According to the measured value, based on the pre-built tension correction function, the actual tension value is obtained.

[0051] Specifically, the inventors found in the actual processing process that the processing effect achieved by adjusting the tension value according to the measured tension value is often not very ideal.

[0052] After extensive research, the inventors discovered that during the production process, there was some error between the measured value and the actual value obtained by the strain gauge 14-type tension sensor, resulting in an inability to accurately correct the tension of the electrode wire and ensure that it could be processed within a reasonable tension range. In response to this, the inventors, after extensive experimental research, developed the solution of this embodiment to address the problem in the prior art of the strain gauge 14-type tension sensor being unable to accurately correct the tension of the electrode wire.

[0053] S3. Obtain target tension value.

[0054] Specifically, the target tension value is a tension value of the electrode wire in the current processing process preset by the user, or a default tension value of the wire cutting machine, which is not specifically limited in the present invention.

[0055] S4. Correct the linear speed or torque of the tension motor 1 according to the difference between the actual value and the target tension value.

[0056] Specifically, the equivalent structure diagram of the embodiment of the present invention is as follows Figure 3 As shown. Assume that the length of the tension pendulum is , the angular velocity is , quality is , the equivalent moment of inertia of the tension pendulum and the motor rotor is The distance between the center of gravity of the pendulum and the axis of the tension motor is , the torque applied by the tension motor is , angular velocity Taking the derivative with respect to time t gives the acceleration.

[0057] Then the dynamic equation of the tension pendulum is:

[0058] (1)

[0059] Cutting line tension is:

[0060] (2)

[0061] According to equations 1 and 2, the relationship between the motor line tension and the torque / line speed of the tension motor 1 can be obtained, thereby calculating the torque / line speed corresponding to the difference.

[0062] In this embodiment, a tension sensor directly measures the line tension and then feeds the tension signal back to the tension controller. This signal is subtracted from the tension value preset in the closed-loop system to calculate a control signal. This automatically adjusts the motor's line speed to bring the actual tension closer to the set value, achieving tension control.

[0063] The control component uses tension deviation to control the tension assembly and adjust tension. Tension disturbances are compensated by the system through the tension closed loop. This control method successfully decouples tension from speed, while simultaneously suppressing both speed and tension disturbances.

[0064] The embodiment of the present invention uses a relatively light tension pendulum to replace the gravity hammer, and uses an AC servo motor as the tension motor, which is directly torque-controlled to replace the tensioning effect of the gravity hammer. The equivalent structure diagram of its mechanical structure is shown in FIG. Figure 3 shown.

[0065] The tension control device applies constant reverse tension to the wire electrode through the tension assembly. It also continuously monitors the wire electrode tension through a detection assembly mounted on the wire feed system. The control assembly uses the detection signal feedback from the detection assembly to accurately control the tension of the tension assembly, thereby achieving optimal control of wire electrode tension variations and vibrations.

[0066] Furthermore, the embodiment of the present invention can accurately position the tension roller 5 to prevent streaks and drum shapes during finishing. The tension of the electrode wire is monitored during processing, and the tension change is fed back to the tension servo, which in turn changes the speed of the tension servo motor through the output.

[0067] Based on the above embodiment, in an optional embodiment of the present invention, the tension correction function is constructed according to steps A1 to A7:

[0068] A1. Obtain the measured value and actual value of the electrode wire under different torque conditions of the tension motor 1, and form a measurement array and an actual array. The measured value is measured by the strain gauge 14, and the actual value is measured by the wire tension meter connected to the electrode wire. Measurement array for , the actual array for , where For the The measured value of the measurement, For the The actual value of the measurement.

[0069] A2. Assume that the linear function of the tension model is Where, is the independent variable, is the dependent variable, and As a parameter.

[0070] A3. Assume the performance function of the fitting for Where, is the number of elements in the array, and are the parameters of the linear function of the tension model, For the The measured value of the measurement, For the The actual value of the measurement.

[0071] A4、Set dimensional vector , to transform the performance function Converted into vector operation form, we get .

[0072] A5. To solve the performance function The minimum value of the target is the performance function in vector form. , respectively Derivative , .

[0073] A6. Solve the derivative results based on the measured array and the actual array to obtain , .

[0074] A7. The solved Value and The value is brought into the tension model linear function to obtain the tension correction function of the relationship between the measured value and the actual value of the electrode wire .

[0075] Specifically, when the tension pendulum is stationary, the force generated by the tension sensor's own weight and the motor torque is responsible for tension generation. Through extensive research, the inventors have discovered that the actual electrode wire tension is a linear function of its measured value. When the tension pendulum is stationary, the measurement method, as shown in Table 1, gradually increases the output torque of the tension motor 1, and sequentially measures the tension sensor's measured value and the corresponding actual tension value.

[0076] Table 1 Tension measurement method

[0077]

[0078] In order to improve the recognition accuracy, multiple groups of data samples are measured and the measured data are written into array form. Let the tension measurement value array and the corresponding tension actual value array be and , 、 For the The measurement results are:

[0079] (3)

[0080] (4)

[0081] Where, is the matrix transpose operator.

[0082] Assume that the linear function of the tension model is:

[0083] (5)

[0084] Then let the performance function of the fitting be:

[0085] (6)

[0086] set up dimensional vector Formula (11) is written in vector operation form, and we get:

[0087] (7)

[0088] To seek The minimum value of Taking the derivative, we get:

[0089] (8)

[0090] (9)

[0091] From equations (8) and (9), we can get:

[0092] (10)

[0093] (11)

[0094] Substituting equations (10) and (11) into equation (5), we can obtain the relationship between the tension detection value and the actual tension value as follows:

[0095] (12)

[0096] like Figure 1 and Figure 2As shown, based on the above embodiment, in an optional embodiment of the present invention, the tension assembly further includes a first pinch roller 6 swingably configured on the adjustment base and a second pinch roller 7 coupled to the motor output end 2. The tension roller 5 abuts against the first pinch roller 6 and the second pinch roller 7. The tension motor 1 is used to drive the second pinch roller 7 to swing, thereby driving the tension roller 5 to move closer to or away from the first inlet and outlet roller 3 and the second inlet and outlet roller 4.

[0097] Specifically, such as Figure 1 As shown, the tension roller 5 is controlled by the first pressing roller 6 and the second pressing roller 7 to move up and down, thereby controlling the tension. The structure of the tension roller 55 is as shown in FIG. Figure 2 shown.

[0098] like Figure 4 and Figure 5 As shown, based on the above embodiment, in an optional embodiment of the present invention, the tension assembly further includes a bearing base 10 coupled to the adjustment base, a bearing 9 configured on the bearing base 10, a roller mounting shaft 8 configured on the bearing 9, and a roller end cap 11 configured on the tension roller 5. The tension roller 5 is configured on the roller mounting shaft 8. Preferably, the bearing base 10 is configured to be coupled to the adjustment base in a manner capable of movement along a predetermined direction.

[0099] Regarding the tension fluctuation of the tension control device of the embodiment of the present invention compared with the existing gravity hammer control method: the third term in formula (2) is the decisive factor causing tension fluctuation, and it is used in the design The value of is as small as possible, so that the third term on the right side of equation (2) that causes tension fluctuation is much smaller than the second term. The pulley at the contact end of the tension pendulum and the cutting line is light in mass, and the rotational inertia of the tension pendulum (including the tension motor rotor) is approximately:

[0100] (13)

[0101] In formula (13), is the moment of inertia of the motor rotor.

[0102] Will The mass equivalent to the tension pendulum is ,set up:

[0103] (14)

[0104] Substituting formula (14) into formula (13), we get:

[0105] (15)

[0106] According to formula (15), the tension fluctuation term in formula (2) is transformed to obtain:

[0107] (16)

[0108] In formula (16), It reflects the following error of the pay-off wheel following system.

[0109] Assuming that the acceleration before and after the mechanical structure improvement is the same (i.e. The following error is the same), the tension fluctuation amplitude ratio coefficient is:

[0110] (17)

[0111] Where, for

[0112] In the embodiment of the present invention, the main parameters of the tension closed-loop control system are The tension servo motor uses AC SERVO MOTOR [MSMF012L1N2], and its rotor inertia is: , the corresponding equivalent pendulum mass is .

[0113] Assume that the percentage of tension fluctuation amplitude decrease after the mechanism is improved is ,but:

[0114] (18)

[0115] According to formula (17), taking m as the independent variable, we can get The curve, such as Figure 6 shown.

[0116] from Figure 6 It can be seen that when the tension required for cutting the wire is greater, the tension control effect of applying torque with a servo motor is more ideal, compared with the control method of gravity hammer:

[0117] When the tension is 14.7N (corresponding to m being 3kg), the tension fluctuation amplitude decreases by nearly 93%.

[0118] When the tension is 24.7N (corresponding to m is 5kg), the tension fluctuation amplitude decreases by nearly 96%.

[0119] In summary, the tension control device of the embodiment of the present invention significantly reduces tension disturbance and overcomes the shortcomings of open-loop control.

[0120] Example 2

[0121] like Figure 7As shown, an embodiment of the present invention provides a tension control method for a wire-cutting machine tool, which can be performed by a tension control device for the wire-cutting machine tool (hereinafter referred to as the tension control device). Specifically, the method is performed by one or more processors in the tension control device to implement steps S1 to S4.

[0122] S1. Obtain the measurement value of the strain gauge.

[0123] S2. According to the measured value, based on the pre-built tension correction function, the actual tension value is obtained.

[0124] S3. Obtain target tension value.

[0125] S4. Correct the linear speed of the tension motor according to the difference between the actual value and the target tension value.

[0126] Based on the above embodiment, in an optional embodiment of the present invention, the tension correction function is constructed according to the following steps:

[0127] A1. Obtain the measured value and actual value of the electrode wire under different torque conditions of the tension motor, and form a measurement array and an actual array. The measured value is obtained by the strain gauge, and the actual value is measured by the wire tension meter connected to the electrode wire. Measurement array for , the actual array for , where For the The measured value of the measurement, For the The actual value of the measurement.

[0128] A2. Assume that the linear function of the tension model is Where, is the independent variable, is the dependent variable, and As a parameter.

[0129] A3. Assume the performance function of the fitting for Where, is the number of elements in the array, and are the parameters of the linear function of the tension model, For the The measured value of the measurement, For the The actual value of the measurement.

[0130] A4、Set dimensional vector , to transform the performance function Converted into vector operation form, we get .

[0131] A5. To solve the performance function The minimum value of the target is the performance function in vector form. , respectively Derivative , .

[0132] A6. Solve the derivative results based on the measured array and the actual array to obtain , .

[0133] A7. The solved Value and The value is brought into the tension model linear function to obtain the tension correction function of the relationship between the measured value and the actual value of the electrode wire .

[0134] Example 3:

[0135] like Figure 8 As shown, an embodiment of the present invention provides a tension control device for a wire cutting machine tool, which includes:

[0136] The measurement module 301 is used to obtain the measurement value of the strain gauge.

[0137] The correction module 302 is configured to obtain an actual tension value according to the measured value and based on a pre-built tension correction function.

[0138] The target module 303 is used to obtain a target tension value.

[0139] The correction module 304 is used to correct the linear speed of the tension motor according to the difference between the actual value and the target tension value.

[0140] Based on the above embodiment, in an optional embodiment of the present invention, the tension control device further includes a tension correction function construction module. The tension correction function construction module includes:

[0141] The raw data acquisition unit is used to obtain the measured value and actual value of the electrode wire under different torque conditions of the tension motor, forming a measurement array and an actual array. The measured value is measured by the strain gauge, and the actual value is measured by the wire tension meter connected to the electrode wire. for , the actual array for , where For the The measured value of the measurement, For the The actual value of the measurement.

[0142] Tension model assumption unit, used to set the tension model linear function as Where, is the independent variable, is the dependent variable, and As a parameter.

[0143] Performance function hypothesis unit, used to set the performance function of the fitting for Where, is the number of elements in the array, and are the parameters of the linear function of the tension model, For the The measured value of the measurement, For the The actual value of the measurement.

[0144] Performance function conversion unit, used to set dimensional vector , to transform the performance function Converted into vector operation form, we get .

[0145] Performance function derivation unit, used to solve the performance function The minimum value of the target is the performance function in vector form. , respectively Derivative , .

[0146] Performance function solving unit, used to solve the derivative results based on the measurement array and the actual array , .

[0147] The tension correction function acquisition unit is used to convert the solved Value and The value is brought into the tension model linear function to obtain the tension correction function of the relationship between the measured value and the actual value of the electrode wire .

[0148] Example 4:

[0149] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the tension control method of the wire cutting machine tool as described in any section of Example 2.

[0150] In the several embodiments provided in the embodiments of the present invention, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device and method embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the devices, methods, and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, which contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, as well as the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified functions or actions, or can be implemented using a combination of dedicated hardware and computer instructions.

[0151] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0152] If the functions are implemented in the form of software modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, electronic device, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks. It should be noted that, in this document, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or device that includes a series of elements includes not only those elements but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. Without further constraints, an element defined by the phrase "comprises a..." does not preclude the existence of additional identical elements in the process, method, article or apparatus that includes the element.

[0153] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0154] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0155] The word "if," as used herein, may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0156] The references to "first" and "second" in the embodiments merely distinguish similar objects and do not represent a specific ordering of the objects. It is understood that the specific order or precedence of "first" and "second" can be interchanged where appropriate. It should be understood that the objects distinguished by "first" and "second" can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0157] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A tension control device for a wire cutting machine tool, characterized in that: Include: A tension assembly is coupled to the electrode wire for adjusting the tension of the electrode wire; the tension assembly comprises an adjustment base, a first inlet and outlet roller (3) and a second inlet and outlet roller (4) rotatably arranged on the adjustment base, a tension roller (5) movably arranged on the adjustment base, and a tension motor (1) coupled to the tension roller (5); the tension motor (1) is used to drive the tension roller (5) to move closer to or away from the first inlet and outlet roller (3) and the second inlet and outlet roller (4); A detection component is coupled to the electrode wire to measure the tension of the electrode wire; the detection component comprises a measurement base, a measurement roller (12) disposed on the measurement base, and a strain gauge (14) coupled to the measurement roller (12); A control component is electrically connected to the strain gauge (14) and the tension motor (1); the control component includes a processor, a memory, and a computer program stored in the memory; the computer program can be executed by the processor to implement the following steps: Obtaining a measurement value of a strain gauge (14); According to the measured value, based on a pre-built tension correction function, an actual tension value is obtained; Get the target tension value; According to the difference between the actual value and the target tension value, the linear speed of the tension motor (1) is corrected; specifically: Assume the length of the tension pendulum is , the angular velocity is , quality is , the equivalent moment of inertia of the tension pendulum and the motor rotor is The distance between the center of gravity of the pendulum and the axis of the tension motor is , the torque applied by the tension motor is , angular velocity Taking the derivative with respect to time t gives the acceleration; Then the dynamic equation of the tension pendulum is: （1） Cutting line tension is: （2） The relationship between the motor line tension and the torque / line speed of the tension motor (1) is obtained according to equations 1 and 2, thereby calculating the torque / line speed corresponding to the difference; The tension correction function is constructed according to the following steps: Obtain the measured value and actual value of the electrode wire under different torque conditions of the tension motor (1), and form a measurement array and an actual array; wherein the measured value is measured by the strain gauge (14), and the actual value is measured by the wire tension meter connected to the electrode wire; the measurement array for , the actual array for , where For the The measured value of the measurement, For the The actual value of the measurement; Assume that the linear function of the tension model is Where, is the independent variable, is the dependent variable, and is a parameter; Assume the performance function of the fitting for Where, is the number of elements in the array, and are the parameters of the linear function of the tension model, For the The measured value of the measurement, For the The actual value of the measurement; set up dimensional vector , to convert the performance function Converted into vector operation form, we get ; To solve the performance function The minimum value of the target is the performance function in vector form. , respectively Derivative , ; Solve the derivative result according to the measurement array and the actual array to obtain , ; Will solve Value and The value is brought into the tension model linear function to obtain the tension correction function of the relationship between the measured value and the actual value of the electrode wire ; The tension assembly further comprises a first clamping roller (6) swingably arranged on the adjustment base and a second clamping roller (7) connected to the motor output end (2); the tension roller (5) abuts against the first clamping roller (6) and the second clamping roller (7); the tension motor (1) is used to drive the second clamping roller (7) to swing, so as to drive the tension roller (5) to approach or move away from the first inlet and outlet roller (3) and the second inlet and outlet roller (4).

2. The tension control device for a wire cutting machine according to claim 1, characterized in that: The tension assembly further comprises a bearing base (10) coupled to the adjustment base, a bearing (9) disposed on the bearing base (10), a roller mounting shaft (8) disposed on the bearing (9), and a roller end cover (11) disposed on the tension roller (5); the tension roller (5) is disposed on the roller mounting shaft (8); The bearing base (10) is configured to be coupled to the adjustment base in a manner capable of moving along a predetermined direction.

3. The tension control device for a wire cutting machine according to claim 1, characterized in that: The detection component further comprises a strain seat (13) configured on the measurement base; the strain gauge (14) is configured on the strain seat (13).

4. A tension control method for a wire cutting machine tool, for controlling the tension control device of the wire cutting machine tool according to any one of claims 1 to 3, characterized in that: Include: Get the measured value of the strain gauge; According to the measured value, based on a pre-built tension correction function, an actual tension value is obtained; Get the target tension value; According to the difference between the actual value and the target tension value, the linear speed of the tension motor is corrected.

5. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the tension control method for the wire cutting machine tool according to claim 4.

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