Wire electrical discharge machining device and method

Abstract

The invention discloses a wire cut electrical discharge machining device and method, and relates to the technical field of material cutting, the wire cut electrical discharge machining device comprises an opening adjusting module, a control module, a movable sliding table module and a reciprocating wire conveying machining module, the movable sliding table module and the reciprocating wire conveying machining module are electrically connected with the control module, and the movable sliding table module is used for being attached to a to-be-machined workpiece or an auxiliary tool; the opening adjusting module is installed on the movable sliding table module, the movable sliding table module can drive the opening adjusting module to linearly move, the reciprocating wire conveying machining module is installed on the opening adjusting module, and the opening adjusting module can adjust the opening size of the reciprocating wire conveying machining module. The reciprocating wire conveying machining module can take up and pay off an electrode wire, the electrode wire extends out and is limited to the opening of the reciprocating wire conveying machining module, and the electrode wire can cut a workpiece to be machined at the opening of the reciprocating wire conveying machining module. In-place machining can be achieved, adaptability is good, and stability is high.

Description

Technical Field

[0001] The invention relates to the technical field of material cutting, and in particular to an electric spark wire cutting processing device and method. Background Art

[0002] Wire EDM is a technology that uses pulsed spark discharge to etch away conductive materials, which can achieve material cutting and shaping. At present, wire EDM equipment mainly exists in the form of general-purpose wire EDM machines and special-purpose wire EDM machines. According to the characteristics of the processing technology, it is mainly divided into slow-wire wire EDM machines, reciprocating medium-wire wire EDM machines, and fast-wire wire EDM machines. So far, in the scenario of using wire EDM technology, the material to be processed is usually placed on the work surface of the equipment, and the material is cut and processed by controlling the movement of the electrode wire.

[0003] However, in some special scenarios, it is impossible to place the workpiece on the machine tool. For example, during the maintenance of a nuclear power plant, the insulation sleeve cannot be completely removed, but it is necessary to achieve segmented cutting of the pipeline. This requires a kind of electric spark wire cutting processing equipment, which is installed in the working position to achieve cutting; another example is parts in nuclear reactors, such as fuel assembly support structures or cooling pipes, etc.; another example is the maintenance of ship propellers or other underwater equipment. It is often impossible to carry out in a dry dock, especially during ocean voyages. Online cutting and replacement. In many similar usage scenarios, it is necessary to achieve servo discharge and cutting movement of the electrode wire and the workpiece, which requires a set of lightweight, compact, and flexible devices and controllers. However, current devices make it difficult to install the motion mechanism in the processing area, and the complex wire transport mechanism cannot be integrated into a small space. Summary of the invention

[0004] The purpose of the present invention is to provide an electric spark wire cutting processing device and method to solve the problems existing in the above-mentioned prior art, realize in-situ processing, and have good adaptability and high stability.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an electric spark wire cutting processing device, comprising an opening adjustment module, a control module, and a movable slide module and a reciprocating wire processing module electrically connected to the control module, wherein the movable slide module is used to be attached to a workpiece to be processed or an auxiliary tool, the opening adjustment module is installed on the movable slide module, and the movable slide module can drive the opening adjustment module to move linearly, the reciprocating wire processing module is installed on the opening adjustment module, and the opening adjustment module can adjust the opening size of the reciprocating wire processing module, the reciprocating wire processing module can collect and release the electrode wire, and the electrode wire extends out and is limited at the opening of the reciprocating wire processing module, and the electrode wire can cut the workpiece to be processed at the opening of the reciprocating wire processing module.

[0007] In one embodiment, the movable slide module includes a stepper motor, a sliding assembly and a workbench, the workbench is installed on the sliding assembly, and the opening adjustment module is installed on the workbench, the stepper motor is installed at one end of the sliding assembly, the stepper motor can drive the sliding assembly to move, and make the workbench reciprocate along the length direction of the sliding assembly, and the stepper motor is electrically connected to the control module.

[0008] In one embodiment, the sliding assembly includes a translation slide, a lead screw and a movable slider, the lead screw is rotatably connected to the translation slide, the stepper motor is installed at one end of the translation slide, and the output shaft of the stepper motor is connected to one end of the lead screw, the movable slider is sleeved on the outer periphery of the lead screw, and the movable slider is slidably connected to the translation slide, and the workbench is installed at the upper end of the movable slider.

[0009] In one embodiment, the opening adjustment module includes an adjustment fixed platform, a threaded shaft, an adjustment knob, a left adjustment slider and a right adjustment slider. The adjustment fixed platform is installed on the movable slide module, and an adjustment groove is provided at the upper end of the adjustment fixed platform. The threaded shaft is rotatably installed in the adjustment groove, and the adjustment knob is installed at one end of the threaded shaft. The outer periphery of the threaded shaft is provided with two sections of threads with opposite rotation directions. The left adjustment slider and the right adjustment slider are respectively threadedly connected to the two sections of threads with opposite rotation directions, and the left adjustment slider and the right adjustment slider are both slidably connected in the adjustment groove. The upper ends of the left adjustment slider and the right adjustment slider are respectively connected to the two wire transport units of the reciprocating wire processing module, and can drive the two wire transport units to move towards or away from each other.

[0010] In one embodiment, the opening adjustment module also includes a central positioning shaft, which is installed in the adjustment groove and is perpendicular to the threaded shaft. Two clamping plates are provided in the middle of the threaded shaft, and a limiting gap is formed between the two clamping plates. A clamping groove is provided in the middle of the central positioning shaft, and the threaded shaft can be embedded in the clamping groove, and the two clamping plates can limit the central positioning shaft within the limiting gap.

[0011] In one embodiment, a locking screw is installed on the side wall of the adjustment fixing platform corresponding to the position of the left adjustment slider and the right adjustment slider. When the locking screw is loosened, the distance between the left adjustment slider and the right adjustment slider can be adjusted through the threaded shaft. When the locking screw is tightened, it can respectively abut against the left adjustment slider and the right adjustment slider to fix the position of the left adjustment slider and the right adjustment slider.

[0012] In one embodiment, the opening adjustment module also includes two locking pressure plates, and the two locking pressure plates are symmetrically installed on the upper end of the adjustment fixing platform. Both sides of the upper end of the left adjustment slider and both sides of the upper end of the right adjustment slider are provided with limiting steps. The two locking pressure plates can be respectively limited on the limiting steps on both sides of the left adjustment slider and the limiting steps on both sides of the right adjustment slider, and are connected to the upper end surface of the adjustment fixing platform by bolts.

[0013] In one embodiment, the reciprocating wire processing module includes a left wire feeding unit, a right wire feeding unit and a waterproof telescopic shell, the left wire feeding unit includes a left shell, a left wire feeding motor, a left coupling, a left thread rolling wheel, a left thread rolling bearing, a left guide wheel, a left wire guide bearing and a left wire guide nozzle, the left shell is installed on the left adjusting slider, the left wire feeding motor is installed on the upper end of the left shell, the output shaft of the left wire feeding motor extends into the left shell and is connected to the left thread rolling wheel through the left coupling and the left thread rolling bearing, the left guide wheel is rotatably installed in the left shell through the left thread guide bearing, and the left wire guide nozzle is installed on the side wall of the left shell; the right wire feeding unit includes a right shell, a right wire feeding motor, a right coupling, a right thread rolling wheel, a right thread rolling bearing, a right guide wheel, a right wire guide bearing and a right wire guide nozzle, the right shell is installed on the right adjusting slider, and the right wire feeding motor is installed on the right shell At the upper end, the output shaft of the right wire feeding motor extends into the right housing and is connected to the right rolling wheel through the right coupling and the right rolling bearing, the right guide wheel is rotatably installed in the right housing through the right guide bearing, and the right wire guide nozzle is installed on the side wall of the right housing; the left housing and the right housing are both curved, and the two ends of the waterproof telescopic shell are respectively installed on the first end of the left housing and the first end of the right housing, the left wire guide nozzle is installed on the second end of the left housing, and the right wire guide nozzle is installed on the second end of the right housing; one end of the electrode wire is fixedly wound on the left rolling wheel, and the other end of the electrode wire is fixedly wound on the right rolling wheel after passing through the left guide wheel, the left wire guide nozzle, the right wire guide nozzle and the right guide wheel in turn, and the electrode wire between the left wire guide nozzle and the right wire guide nozzle is used to cut the workpiece to be processed.

[0014] In one embodiment, the left shell body includes a left top shell, a left side shell and a left bottom shell, the left top shell is encapsulated at the upper end of the left side shell, the left bottom shell is encapsulated at the lower end of the left side shell, and the left top shell is provided with a hole for the output shaft of the left wire feeding motor to pass through, the inner wall of the left bottom shell is connected with a left tensioning mechanism through a spring, and the left tensioning mechanism can contact the electrode wire on the side away from the spring; the right shell body includes a right top shell, a right side shell and a right bottom shell, the right top shell is encapsulated at the upper end of the right side shell, the right bottom shell is encapsulated at the lower end of the right side shell, and the right top shell is provided with a hole for the output shaft of the right wire feeding motor to pass through, the inner wall of the right bottom shell is connected with a right tensioning mechanism through a spring, and the right tensioning mechanism can contact the electrode wire on the side away from the spring, and working fluid interfaces are provided on the left shell and the right side shell.

[0015] The present invention also provides an electric spark wire cutting method, using the electric spark wire cutting device described in any one of the above technical solutions, comprising the following steps:

[0016] S1. Move the wire EDM device to the installation position, and assemble the wire EDM device, and then connect one end of the machining pulse power supply in the control module to the workpiece to be machined;

[0017] S2. Adjust the opening size of the reciprocating wire processing module through the opening adjustment module to adapt to different usage scenarios and usage requirements;

[0018] S3. The control module controls the movement of the movable slide module and drives the reciprocating wire processing module to perform edge matching to find the processing starting position;

[0019] S4. The control module controls the processing pulse power supply to be turned on, and controls the movable slide module to perform servo motion. At the same time, the control module controls the introduction of the working fluid, and the working fluid enters the interior of the reciprocating wire processing module through the working fluid interface, and then rushes to the processing part from the flushing holes around the left wire guide nozzle and the right wire guide nozzle;

[0020] S5. Perform discharge cutting according to the set processing program until the processing is completed;

[0021] S6. Remove the wire-cut EDM device from the installation position, transport it to the next position to be processed, repeat S1-S5 until all processing tasks are completed and then evacuate.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The electric spark wire cutting processing device and method provided by the present invention are characterized in that the movable slide module is used to be attached to the workpiece to be processed or the auxiliary tool, the opening adjustment module is installed on the movable slide module, and the movable slide module can drive the opening adjustment module to move linearly, and the reciprocating wire processing module is installed on the opening adjustment module. The overall structure is simple and compact, and the method of "tool finding workpiece" replaces the method of "workpiece finding tool" to realize the electric spark wire cutting processing device to be arbitrarily fixed on the part to be processed, getting rid of the bulky machine tool body, solving many working conditions that the processed parts cannot be disassembled but need to be processed and cut, and realizing in-situ discharge cutting, the opening adjustment module can adjust the opening size of the reciprocating wire processing module, so as to adapt to different processing needs, and has a wide range of applications. The wire processing module can collect and release the electrode wire, avoiding the problem of the electrode wire being loose and detached or being torn off due to excessive tension caused by the reduction or accumulation of the electrode wire due to the simple wire releasing action or the simple wire collecting action, thereby providing stable wire tension. At the same time, it cooperates with the control module to realize stable control of the discharge cutting, improves the processing stability and efficiency, and ensures that the tension of the electrode wire is always within a reasonable range through the rotation coordination of the two wire transport motors, avoiding the electrode wire being loose and detached from the guide wheel or being torn off due to excessive tension caused by the reduction or accumulation of the wire in the wire rolling barrel during the wire releasing and collecting process, and the electrode wire is extended and limited at the opening of the reciprocating wire processing module, and the electrode wire can cut the workpiece to be processed at the opening of the reciprocating wire processing module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the electric spark wire cutting processing device in Example 1;

[0026] Figure 2 This is a structural exploded view of the reciprocating wire processing module in Example 1;

[0027] Figure 3 This is a structural schematic diagram of the opening adjustment module in Example 1;

[0028] Figure 4 It is a partial structural schematic diagram of the right wire transport unit in the first embodiment;

[0029] Figure 5 This is a real picture of a workpiece obtained by using the wire electric discharge machining method in Example 2;

[0030] Figure 6 The current and voltage waveforms of a single pulse normal discharge collected in the wire-cut electric discharge machining method in Example 2;

[0031] In the figure: 1-opening adjustment module, 2-left bottom shell, 3-left side shell, 4-left top shell, 5-electrode wire, 6-left mounting seat, 7-left wire transport motor, 8-right wire transport motor, 9-right mounting seat, 10-right side shell, 11-right top shell, 12-right bottom shell, 13-waterproof telescopic shell, 14-movable slide module, 15-right wire guide nozzle, 16-right guide wheel, 17-right rolling wheel, 18-right coupling, 19-left coupling, 20-left rolling wheel, 21-left rolling Wire bearing, 22-left guide wheel, 23-left guide wire bearing, 24-left guide wire nozzle, 25-tensioning mechanism, 26-right guide wire bearing, 27-right rolling bearing, 28-workpiece to be processed, 101-adjusting fixed table, 102-threaded shaft, 103-locking screw, 104-left adjusting slider, 105-locking pressure plate, 106-middle positioning shaft, 107-right adjusting slider, 1001-working fluid interface, 1002-control module, 281-cutting section. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The purpose of the present invention is to provide an electric spark wire cutting processing device and method to solve the problems existing in the prior art, realize in-situ processing, and have good adaptability and high stability.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Embodiment 1

[0036] like Figure 1-Figure 6As shown, this embodiment provides an electric spark wire cutting processing device, including an opening adjustment module 1, a control module 1002, and a movable slide module 14 and a reciprocating wire processing module electrically connected to the control module 1002. The movable slide module 14 is used to be attached to a workpiece 28 to be processed or an auxiliary tool, and then by fixing the movable slide module 14 on the surface of the processed part, a single-axis servo cutting movement is realized. The opening adjustment module 1 is installed on the movable slide module 14, and the movable slide module 14 can drive the opening adjustment module 1 to move linearly. The reciprocating wire processing module is installed on the opening adjustment module 1. The overall structure is simple and compact. The "tool finds the workpiece" method replaces the "workpiece finds the tool" method to realize the electric spark wire cutting processing device being arbitrarily fixed on the part to be processed, getting rid of the bulky machine tool body, solving many working conditions where the processed parts cannot be disassembled but need to be processed and cut, and realizing in-situ discharge cutting. The section module 1 can adjust the opening size of the reciprocating wire processing module, so as to adapt to different processing needs and has a wide range of applications. The reciprocating wire processing module can collect and release the electrode wire 5, avoiding the problem of the electrode wire 5 being loose and detached or being torn off due to excessive tension caused by the reduction or accumulation of the electrode wire 5 due to the simple wire releasing action or the simple wire collecting action, thereby providing a stable wire tension. At the same time, it cooperates with the control module 1002 to achieve stable control of the discharge cutting, improves the processing stability and processing efficiency, and ensures that the tension of the electrode wire 5 is always within a reasonable range through the rotation coordination of the two wire transport motors, avoiding the electrode wire 5 being loose and detached from the guide wheel or being torn off due to excessive tension caused by the reduction or accumulation of wire in the wire rolling barrel during the wire releasing and collecting process, and the electrode wire 5 is extended and limited at the opening of the reciprocating wire processing module, and the electrode wire 5 can cut the workpiece 28 to be processed at the opening of the reciprocating wire processing module.

[0037] Specifically, the movable slide module 14 includes a stepper motor, a sliding assembly and a workbench. The workbench is installed on the sliding assembly, and the opening adjustment module 1 is installed on the workbench. The stepper motor is installed at one end of the sliding assembly. The stepper motor can drive the sliding assembly to move and make the workbench reciprocate along the length direction of the sliding assembly to realize the movement of the opening adjustment module 1 and the reciprocating wire processing module. The stepper motor is electrically connected to the control module 1002 to realize automatic control.

[0038] The sliding assembly includes a translation slide, a lead screw and a moving slider. The lead screw is rotatably connected to the translation slide. The stepper motor is installed at one end of the translation slide, and the output shaft of the stepper motor is connected to one end of the lead screw. The moving slider is sleeved on the outer circumference of the lead screw, and the moving slider is slidably connected to the translation slide. The workbench is installed at the upper end of the moving slider. When the stepper motor is working, it can drive the lead screw to rotate, and the rotation of the lead screw is converted into linear movement of the moving slider. At the same time, the translation slide limits the moving slider to ensure linear movement, and finally the moving slider drives the workbench to move linearly.

[0039] The control module 1002 includes a pulse power supply module, a discharge and servo motion controller, wherein the discharge and servo motion controller realizes the servo feed and retract motion of the mobile slide module 14 during the discharge process, and simultaneously realizes the discharge parameter adjustment of the pulse power supply module, and the pulse power supply module provides energy to the electrode wire 5 when cutting the workpiece.

[0040] The electrode wire 5 is usually a brass wire or a molybdenum wire, or may be other reasonable materials, and its diameter and length are selected according to the specific use of the device.

[0041] The opening adjustment module 1 includes an adjustment fixed platform 101, a threaded shaft 102, an adjustment knob, a left adjustment slider 104 and a right adjustment slider 107. The adjustment fixed platform 101 is installed on the movable slide module 14, and an adjustment groove is provided at the upper end of the adjustment fixed platform 101. The threaded shaft 102 is rotatably installed in the adjustment groove, and the adjustment knob is installed at one end of the threaded shaft 102. The threaded shaft 102 can be driven to rotate by rotating the adjustment knob. The outer periphery of the threaded shaft 102 is provided with two sections of threads with opposite rotation directions. The left adjustment slider 104 and the right adjustment slider 107 are respectively threadedly connected to the two sections of threads with opposite rotation directions, and the left adjustment slider 104 and the right adjustment slider 107 are respectively threadedly connected to the two sections of threads with opposite rotation directions. The section slider 104 and the right adjustment slider 107 are both slidably connected in the adjustment groove, and then with the rotation of the threaded shaft 102, the left adjustment slider 104 and the right adjustment slider 107 are made to move symmetrically, that is, the left adjustment slider 104 and the right adjustment slider 107 are driven to move towards or away from each other, and the upper end of the left adjustment slider 104 and the upper end of the right adjustment slider 107 are respectively connected to the two wire transport units of the reciprocating wire transport processing module, and can drive the two wire transport units to move towards or away from each other, thereby realizing the adjustment of the distance between the two wire transport units, and finally realizing the adjustment of the opening size to meet different cutting needs.

[0042] The left adjusting slider 104 and the right adjusting slider 107 are also provided with sliding grooves for sliding connection with the inner wall of the installation groove.

[0043] The opening adjustment module 1 also includes a central positioning shaft 106, which is installed in the adjustment groove and is perpendicular to the threaded shaft 102. Two clamping plates are provided in the middle of the threaded shaft 102, and a limiting gap is formed between the two clamping plates. A clamping groove is provided in the middle of the central positioning shaft 106, and the threaded shaft 102 can be embedded in the clamping groove, and the two clamping plates can limit the central positioning shaft 106 within the limiting gap, thereby axially limiting the threaded shaft 102 through the central positioning shaft 106. At the same time, the central positioning shaft 106 will not affect the rotation of the threaded shaft 102.

[0044] A locking screw 103 is installed on the side wall of the adjustment fixing platform 101 at the position corresponding to the left adjustment slider 104 and the right adjustment slider 107. When the locking screw 103 is loosened, it will not contact the left adjustment slider 104 and the right adjustment module, so that the distance between the left adjustment slider 104 and the right adjustment slider 107 can be adjusted by the threaded shaft 102 to meet different cutting needs. When the locking screw 103 is tightened, it can respectively abut against the left adjustment slider 104 and the right adjustment slider 107, so that the left adjustment slider 104 and the right adjustment slider 107 cannot move, and finally the position of the left adjustment slider 104 and the right adjustment slider 107 is fixed to ensure stability during processing.

[0045] The opening adjustment module 1 also includes two locking pressure plates 105, which are symmetrically installed on the upper end of the adjustment fixing platform 101. Limiting steps are provided on both sides of the upper end of the left adjustment slider 104 and the upper end of the right adjustment slider 107. The two locking pressure plates 105 can be limited on the limiting steps on both sides of the left adjustment slider 104 and the limiting steps on both sides of the right adjustment slider 107, respectively, and are connected to the upper end surface of the adjustment fixing platform 101 by bolts, thereby realizing the limiting of the left adjustment slider 104 and the right adjustment slider 107 by the locking pressure plates 105, thereby preventing the left adjustment slider 104 and the right adjustment slider 107 from falling out of the adjustment groove.

[0046] The reciprocating wire feeding processing module includes a left wire feeding unit, a right wire feeding unit and a waterproof telescopic shell 13. The left wire feeding unit includes a left shell, a left wire feeding motor 7, a left coupling 19, a left thread rolling wheel 20, a left thread rolling bearing 21, a left guide wheel 22, a left thread guide bearing 23 and a left thread guide nozzle 24. The left shell is installed on the left adjusting slider 104. The left wire feeding motor 7 is installed on the upper end of the left shell through the left mounting seat 6. The output shaft of the left wire feeding motor 7 extends into the left shell and is connected to the left thread rolling wheel 20 through the left coupling 19 and the left thread rolling bearing 21. The left guide wheel 22 is rotatably installed in the left shell through the left thread guide bearing 23, and the left thread guide nozzle 24 is installed on the side wall of the left shell. When the left wire feeding motor 7 is working, The left thread rolling wheel 20 can be driven to rotate through the left coupling 19, and the wire can be collected or released as the left thread rolling wheel 20 moves. At the same time, the left thread rolling bearing 21 can improve the stability during rotation, and the left guide wheel 22 can guide the electrode wire 5 during the process of collecting or releasing the wire, thereby improving the smoothness of collecting or releasing the wire and realizing stable wire transportation; the right wire transportation unit includes a right shell, a right wire transportation motor 8, a right coupling 18, a right thread rolling wheel 17, a right thread rolling bearing 27, a right guide wheel 16, a right wire guide bearing 26 and a right wire guide nozzle 15, the right shell is installed on the right adjusting slider 107, the right wire transportation motor 8 is installed on the upper end of the right shell through the right mounting seat 9, and the output shaft of the right wire transportation motor 8 extends into the right shell. The right thread rolling wheel 17 is connected through the right coupling 18 and the right thread rolling bearing 27, the right guide wheel 16 is rotatably installed in the right shell body through the right thread guide bearing 26, and the right thread guide nozzle 15 is installed on the side wall of the right shell body; the left shell body and the right shell body are both curved, and the two ends of the waterproof telescopic shell 13 are respectively installed on the first end of the left shell body and the first end of the right shell body, which plays a role of waterproof and dustproof, the left thread guide nozzle 24 is installed on the second end of the left shell body, and the right thread guide nozzle 15 is installed on the second end of the right shell body. When the right wire transport motor 8 is working, it can drive the right thread rolling wheel 17 to rotate through the right coupling 18, and the wire can be collected or released as the right thread rolling wheel 17 moves. At the same time, the right thread rolling bearing 27 can improve the rotation time Stability, the right guide wheel 16 can guide the electrode wire 5 during the process of wire collection or wire release, improve the smoothness of wire collection or wire release, and realize stable wire transportation; one end of the electrode wire 5 is fixedly wound on the left rolling wheel 20, and the other end of the electrode wire 5 is successively wound around the left guide wheel 22, the left wire guide nozzle 24, the right wire guide nozzle 15 and the right guide wheel 16, and then fixedly wound on the right rolling wheel 17. The electrode wire 5 between the left wire guide nozzle 24 and the right wire guide nozzle 15 is used to cut the workpiece 28 to be processed. During the processing, electric spark discharge is generated between the electrode wire 5 and the workpiece 28 to be processed, so as to remove the material to realize cutting, and obtain the cutting section 281 with obvious electric spark cutting marks, as shown in FIG. Figure 6As shown, the current and voltage waveforms of normal discharge during a single pulse experiment are collected when an electric spark discharge is generated between the electrode wire 5 and the workpiece 28 to be processed. When the working fluid is broken down, the voltage drops rapidly and the current rises rapidly. In the actual operation process, the tension of the electrode wire 5 is always within a reasonable range through the rotation coordination of the left wire feeding motor 7 and the right wire feeding motor 8, so as to avoid the electrode wire 5 being loosened and separated from the left guide wheel 22 or the right guide wheel 16 due to the reduction or accumulation of the electrode wire 5 during the wire unwinding and wire collecting process of the left wire rolling wheel 20 or the right wire rolling wheel 17, or being torn due to excessive tension, thereby solving the problems of the prior art being unable to process in situ, the wire rolling and wire feeding device being too large, and the difficulty of reciprocating wire feeding under stable tension.

[0047] The left shell body includes a left top shell 4, a left side shell 3 and a left bottom shell 2. The left top shell 4 is encapsulated at the upper end of the left side shell 3, and the left bottom shell 2 is encapsulated at the lower end of the left side shell 3. The left top shell 4 is provided with a hole for the output shaft of the left wire feeding motor 7 to pass through. The inner wall of the left bottom shell 2 is connected with a left tensioning mechanism 25 through a spring. The left tensioning mechanism 25 can contact the electrode wire 5 on the side away from the spring, and then can realize automatic fine-tuning according to the tension change of the electrode wire 5, so as to improve the wire feeding stability. That is, when the electrode wire 5 is tensioned, the left tensioning mechanism 25 can be squeezed, and the left tensioning mechanism 25 squeezes the corresponding spring. When the electrode wire 5 is loose, the spring pushes the left tensioning mechanism 25 to reset, so that the left tensioning mechanism 25 can provide a certain supporting force for the electrode wire 5 to avoid the electrode wire 5 being too loose. This causes a short circuit and broken wire, and then the left wire guide nozzle 24 and the right wire guide nozzle 15 with flushing holes are used to flush the working fluid in the processing area; the right shell body includes a right top shell 11, a right shell 10 and a right bottom shell 12, the right top shell 11 is encapsulated at the upper end of the right shell 10, the right bottom shell 12 is encapsulated at the lower end of the right shell 10, and the right top shell 11 is provided with a hole for the output shaft of the right wire feeding motor 8 to pass through, and the inner wall of the right bottom shell 12 is connected to the right tensioning mechanism 25 through a spring, and the right tensioning mechanism 25 can contact the electrode wire 5 on the side away from the spring, and then can realize automatic fine-tuning according to the tension change of the electrode wire 5, thereby improving the wire feeding stability, and the right tensioning adjustment element is consistent with the left tensioning mechanism 25, and the left shell 3 and the right shell 10 are both provided with working fluid interfaces 1001.

[0048] The wire feeding process of this embodiment is as follows: when feeding the wire in the forward direction, the left wire feeding motor 7 drives the left wire rolling wheel 20 to rotate forwardly through the left coupling 19, and winds the electrode wire 5 around the left wire rolling wheel 20 circle by circle; the right wire feeding motor 8 drives the right wire rolling wheel 17 to rotate forwardly through the right coupling 18, and cooperates with the left wire feeding motor 7 to adjust the rotation speed and gradually release the electrode wire 5; during the wire feeding process, when the left wire rolling wheel 20 and the right wire rolling wheel 17 cooperate in wire feeding, the change in the winding diameter of the electrode wire 5 wound around the left wire rolling wheel 20 and the right wire rolling wheel 17 will cause the change in the wire tension; in this process, the tensioning top block on the left tensioning mechanism 25 and the right tensioning mechanism 25 are With the assistance of the tensioning top block on the structure 25, the wire tension of the electrode wire 5 is automatically fine-tuned, and the speed of the left wire feeding motor 7 releasing the electrode wire 5 is continuously adjusted. The electrode wire 5 maintains a constant wire feeding position under the action of the left guide wheel 22, the left wire guide nozzle 24, the right wire guide nozzle 15 and the right guide wheel 16. When the electrode wire 5 on the right wire rolling wheel 17 is released to the limit length, the master-slave relationship between the right wire rolling wheel 17 and the left wire rolling wheel 20 is changed. The right wire rolling wheel 17 performs reverse motion and rotation to collect and wind the wire, and the left wire rolling wheel 20 cooperates to release the wire, thereby finally achieving stable wire feeding and, at the same time, making the wire feeding structure more compact and simple.

[0049] Embodiment 2

[0050] like Figure 1-Figure 6 As shown, this embodiment provides an electric spark wire cutting method, using the electric spark wire cutting device in embodiment 1, including the following steps:

[0051] S1. Move the wire EDM device to the installation position and assemble the wire EDM device, then connect one end of the machining pulse power supply in the control module 1002 to the workpiece 28 to be machined; specifically, the wire EDM device reaches the installation position manually or driven by an external mechanical device, installs the movable slide module 14 at a reasonable position around the workpiece 28 to be machined, and connects one end of the machining pulse power supply in the control module 1002 to the workpiece 28 to be machined;

[0052] S2. The opening size of the reciprocating wire processing module is adjusted by the opening adjustment module 1 to adapt to different usage scenarios and usage requirements; specifically, the opening adjustment module 1 is adjusted manually or automatically to adjust the opening size of the reciprocating wire processing module;

[0053] S3. The control module 1002 controls the movement of the movable slide module 14, and drives the reciprocating wire processing module to find the starting position of the processing on the edge;

[0054] S4. The control module 1002 controls the processing pulse power supply to be turned on, and controls the movable slide module 14 to perform servo motion. At the same time, the control module 1002 controls the introduction of the working fluid, and the working fluid enters the interior of the reciprocating wire processing module through the working fluid interface 1001, and then rushes to the processing part from the flushing holes around the left wire guide nozzle 24 and the right wire guide nozzle 15;

[0055] S5. Perform discharge cutting according to the set processing program until the processing is completed;

[0056] S6. Remove the wire-cut EDM device from the installation position, transport it to the next position to be processed, repeat S1-S5 until all processing tasks are completed and then evacuate.

[0057] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An electric spark wire cutting processing device, characterized in that: It includes an opening adjustment module, a control module, and a movable slide module and a reciprocating wire processing module electrically connected to the control module, the movable slide module is used to be attached to the workpiece to be processed or the auxiliary tool, the opening adjustment module is installed on the movable slide module, and the movable slide module can drive the opening adjustment module to move linearly, the reciprocating wire processing module is installed on the opening adjustment module, and the opening adjustment module can adjust the opening size of the reciprocating wire processing module, the reciprocating wire processing module can collect and release the electrode wire, and the electrode wire extends out and is limited at the opening of the reciprocating wire processing module, and the electrode wire can cut the workpiece to be processed at the opening of the reciprocating wire processing module.

2. The wire electric discharge machining device according to claim 1, characterized in that: The movable slide module includes a stepper motor, a sliding assembly and a workbench. The workbench is installed on the sliding assembly, and the opening adjustment module is installed on the workbench. The stepper motor is installed at one end of the sliding assembly. The stepper motor can drive the sliding assembly to move and make the workbench reciprocate along the length direction of the sliding assembly. The stepper motor is electrically connected to the control module.

3. The wire electric discharge machining device according to claim 2, characterized in that: The sliding assembly includes a translation slide, a lead screw and a movable slider, the lead screw is rotatably connected to the translation slide, the stepper motor is installed at one end of the translation slide, and the output shaft of the stepper motor is connected to one end of the lead screw, the movable slider is sleeved on the outer circumference of the lead screw, and the movable slider is slidably connected to the translation slide, and the workbench is installed at the upper end of the movable slider.

4. The wire electric discharge machining device according to claim 1, characterized in that: The opening adjustment module includes an adjustment fixed platform, a threaded shaft, an adjustment knob, a left adjustment slider and a right adjustment slider. The adjustment fixed platform is installed on the movable slide module, and an upper end of the adjustment fixed platform is provided with an adjustment slot, the threaded shaft is rotatably installed in the adjustment slot, and the adjusting knob is installed at one end of the threaded shaft, the outer periphery of the threaded shaft is provided with two sections of threads with opposite rotation directions, the left adjustment slider and the right adjustment slider are respectively threadedly connected to the two sections of threads with opposite rotation directions, and the left adjustment slider and the right adjustment slider are both slidably connected in the adjustment slot, the upper ends of the left adjustment slider and the upper ends of the right adjustment slider are respectively connected to the two wire transport units of the reciprocating wire transport processing module, and can drive the two wire transport units to move towards or away from each other.

5. The wire electric discharge machining device according to claim 4, characterized in that: The opening adjustment module also includes a central positioning shaft, which is installed in the adjustment groove and is perpendicular to the threaded shaft. Two clamping plates are provided in the middle of the threaded shaft, and a limiting gap is formed between the two clamping plates. A clamping groove is provided in the middle of the central positioning shaft, and the threaded shaft can be embedded in the clamping groove, and the two clamping plates can limit the central positioning shaft within the limiting gap.

6. The wire electric discharge machining device according to claim 4, characterized in that: A locking screw is installed on the side wall of the adjustment fixing platform corresponding to the position of the left adjustment slider and the right adjustment slider. When the locking screw is loosened, the distance between the left adjustment slider and the right adjustment slider can be adjusted through the threaded shaft. When the locking screw is tightened, it can respectively abut against the left adjustment slider and the right adjustment slider to fix the position of the left adjustment slider and the right adjustment slider.

7. The wire electric discharge machining device according to claim 4, characterized in that: The opening adjustment module also includes two locking pressure plates, which are symmetrically installed on the upper end of the adjustment fixing platform. Both sides of the upper end of the left adjustment slider and both sides of the upper end of the right adjustment slider are provided with limiting steps. The two locking pressure plates can be respectively limited on the limiting steps on both sides of the left adjustment slider and the limiting steps on both sides of the right adjustment slider, and are connected to the upper end surface of the adjustment fixing platform by bolts.

8. The wire electric discharge machining device according to claim 4, characterized in that: The reciprocating wire feeding processing module comprises a left wire feeding unit, a right wire feeding unit and a waterproof telescopic shell, wherein the left wire feeding unit comprises a left shell, a left wire feeding motor, a left coupling, a left thread rolling wheel, a left thread rolling bearing, a left guide wheel, a left wire guide bearing and a left wire guide nozzle, wherein the left shell is mounted on the left adjusting slider, the left wire feeding motor is mounted on the upper end of the left shell, the output shaft of the left wire feeding motor extends into the left shell, and is connected to the left thread rolling wheel through the left coupling and the left thread rolling bearing, the left guide wheel is rotatably mounted in the left shell through the left thread guide bearing, and the left wire guide nozzle is mounted on the side wall of the left shell; the right wire feeding unit comprises a right shell, a right wire feeding motor, a right coupling, a right thread rolling wheel, a right thread rolling bearing, a right guide wheel, a right wire guide bearing and a right wire guide nozzle, wherein the right shell is mounted on the right adjusting slider, the right wire feeding motor is mounted on the upper end of the right shell, The output shaft of the right wire feeding motor extends into the right housing and is connected to the right rolling wheel through the right coupling and the right rolling bearing. The right guide wheel is rotatably installed in the right housing through the right wire bearing, and the right wire guide nozzle is installed on the side wall of the right housing; the left housing and the right housing are both curved, and the two ends of the waterproof telescopic shell are respectively installed on the first end of the left housing and the first end of the right housing, the left wire guide nozzle is installed on the second end of the left housing, and the right wire guide nozzle is installed on the second end of the right housing; one end of the electrode wire is fixedly wound on the left rolling wheel, and the other end of the electrode wire is fixedly wound on the right rolling wheel after passing through the left guide wheel, the left wire guide nozzle, the right wire guide nozzle and the right guide wheel in turn, and the electrode wire between the left wire guide nozzle and the right wire guide nozzle is used to cut the workpiece to be processed.

9. The wire electric discharge machining device according to claim 8, characterized in that: The left shell body includes a left top shell, a left side shell and a left bottom shell, the left top shell is encapsulated at the upper end of the left side shell, the left bottom shell is encapsulated at the lower end of the left side shell, and the left top shell is provided with a hole for the output shaft of the left wire feeding motor to pass through, the inner wall of the left bottom shell is connected with a left tensioning mechanism through a spring, and the left tensioning mechanism can contact the electrode wire on the side away from the spring; the right shell body includes a right top shell, a right side shell and a right bottom shell, the right top shell is encapsulated at the upper end of the right side shell, the right bottom shell is encapsulated at the lower end of the right side shell, and the right top shell is provided with a hole for the output shaft of the right wire feeding motor to pass through, the inner wall of the right bottom shell is connected with a right tensioning mechanism through a spring, and the right tensioning mechanism can contact the electrode wire on the side away from the spring, and working fluid interfaces are provided on the left shell and the right side shell.

10. A wire electric discharge machining method, characterized in that: Using the electric spark wire cutting machining device according to any one of claims 1 to 9 comprises the following steps: S1. Move the wire EDM device to the installation position, and assemble the wire EDM device, and then connect one end of the machining pulse power supply in the control module to the workpiece to be machined; S2. Adjust the opening size of the reciprocating wire processing module through the opening adjustment module to adapt to different usage scenarios and usage requirements; S3. The control module controls the movement of the movable slide module and drives the reciprocating wire processing module to perform edge matching to find the processing starting position; S4. The control module controls the processing pulse power supply to be turned on, and controls the movable slide module to perform servo motion. At the same time, the control module controls the introduction of the working fluid, and the working fluid enters the interior of the reciprocating wire processing module through the working fluid interface, and then rushes to the processing part from the flushing holes around the left wire guide nozzle and the right wire guide nozzle; S5. Perform discharge cutting according to the set processing program until the processing is completed; S6. Remove the wire-cut EDM device from the installation position, transport it to the next position to be processed, repeat S1-S5 until all processing tasks are completed and then evacuate.

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