Electric spark wire feeding and withdrawing device and method with convenient automatic wire feeding

Abstract

The application discloses a kind of electric spark wire collecting and releasing device and method of convenient automatic wire feeding, belong to spark wire cutting processing technical field, including rack;The top of rack is connected with the adjusting type take-up and pay-off assembly for take-up and pay-off;Adjusting type take-up and pay-off assembly includes take-up and pay-off assembly, adjusting type linkage assembly and translation component, translation component is fixedly connected with rack, adjusting type linkage assembly is connected with take-up and pay-off assembly, adjusting type linkage assembly is fixedly connected with translation component;The end of the winding end of take-up and pay-off assembly is fixedly connected with the elastic compression assembly for cutting wire end fixedly connected;The side of rack close to cutting machine tool is connected with the wire feeding assembly for cutting wire to be sent to elastic compression assembly, and wire feeding assembly is movably connected with elastic compression assembly.The application realizes automatic wire feeding, and it is beneficial to practical use.

Description

Technical Field

[0001] This invention relates to the field of wire EDM processing technology, specifically to an EDM wire feeding and take-up device and method that facilitates automatic wire feeding. Background Technology

[0002] Wire electrical discharge machining (EDM) uses a continuously moving fine metal wire (called the electrode wire) as an electrode to remove metal from the workpiece and cut it into shape by pulsed spark discharge. Wire EDM requires wire loading when changing workpieces.

[0003] Chinese Patent CN116252009B discloses an automatic wire cutting device, comprising a machine body; a wire storage mechanism for winding and unwinding wire electrodes, the wire storage mechanism including a wire storage drum, the outer wall of which is provided with a clamping assembly for fixing the end of the wire electrode; a movable tube wire threading mechanism for threading the wire electrode, the movable tube wire threading mechanism having a movable receiving tube near the wire storage drum, the receiving tube being hollow and capable of threading the wire electrode; when the wire storage drum rotates to a preset position, the end of the receiving tube can be moved to act on the clamping assembly, causing it to open; when the receiving tube separates from the clamping assembly, the clamping assembly returns to the clamping state, clamping and fixing the end of the wire electrode; and a clamping and feeding mechanism for clamping and feeding the wire electrode forward or backward. The movable receiving tube, in conjunction with the clamping assembly that can open and clamp, and under the clamping action of the clamping and feeding mechanism, automatic clamping, feeding, and unloading of the wire electrode are achieved, realizing automated operation and significantly improving processing efficiency.

[0004] While the aforementioned patent can achieve the purpose of wire feeding, it cannot detect whether wire feeding has occurred, which can easily lead to the wire not being fed properly.

[0005] Based on this, the present invention designs an EDM wire feeding and take-up device and method for convenient automatic wire feeding to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an electric spark wire feeding and take-up device and method for convenient automatic wire feeding.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An electric spark wire feeding and take-up device for convenient automatic wire feeding, including a frame;

[0009] An adjustable take-up and unwind assembly for taking up and unwinding is connected to the top of the frame;

[0010] The adjustable take-up and unwind assembly includes a take-up and unwind assembly, an adjustable linkage assembly, and a translation assembly. The translation assembly is fixedly connected to the frame, the adjustable linkage assembly is connected to the take-up and unwind assembly, and the adjustable linkage assembly is fixedly connected to the translation assembly. When changing workpieces, the adjustable linkage assembly and the translation assembly are adjusted to a disconnected state, and the take-up and unwind assembly only rotates. When cutting, the adjustable linkage assembly and the translation assembly are adjusted to a linkage state, and the take-up and unwind assembly rotates and moves at the same time.

[0011] The winding end of the unwinding assembly is fixedly connected to an elastic crimping assembly for fixing the end of the cutting wire.

[0012] The side of the frame near the cutting machine tool is connected to a wire feeding assembly for feeding the cutting wire to the elastic pressing assembly. The wire feeding assembly is movably connected to the elastic pressing assembly. When the cutting wire contacts the elastic pressing assembly, the cutting wire, the elastic pressing assembly, and the wire feeding assembly form a closed loop. The system detects whether the cutting wire is inside the elastic pressing assembly. The cutting wire is connected to the negative terminal of the external power supply, and the wire feeding assembly is connected to the positive terminal of the external power supply.

[0013] Furthermore, the winding and unwinding assembly includes a U-shaped support frame, a winding drum, and a second motor. The second motor is fixedly installed on the side wall of the U-shaped support frame. The two ends of the winding drum are rotatably connected to the inner wall of the mounting groove opened in the U-shaped support frame through bearings. The winding drum is fixedly connected to the drive end of the second motor. The adjustable linkage assembly is fixedly connected to the winding drum. The U-shaped support frame is fixedly connected to the translation assembly.

[0014] Furthermore, the adjustable linkage assembly includes a synchronous belt, a first support block, a first synchronous pulley, a first gear, a gear cylinder, a lug, a third support block, a second guide rail assembly, a positioning rod, a second synchronous pulley, a first horizontal shaft, a second horizontal shaft, a first gear ring, a sliding plate, and a third cylinder. The first horizontal shaft is fixedly installed on the end of the winding drum away from the second motor. The second synchronous pulley is fixedly installed on the first horizontal shaft. The first and second synchronous pulleys are meshed with the synchronous belt. The second horizontal shaft is fixedly installed in the mounting hole of the first synchronous pulley. The second horizontal shaft is rotatably connected to the first support block through a bearing. The first support block is fixedly installed on the bottom end of the U-shaped support frame away from the second motor. The end of the second horizontal shaft away from the first support block is coaxially fixedly connected to the first gear. The gear cylinder meshes with the first gear and the first gear ring. The top of the gear cylinder near the end of the first support block is fixedly connected to the lug. The lug slides with the positioning rod through a sliding hole. The end of the positioning rod away from the first support block is fixedly connected to the third support block. When the lug is separated from the positioning rod, the gear cylinder is meshed with the first gear and the first gear ring. When the end of the gear cylinder near the first support block meshes with the middle of the first gear, the lug starts to connect with the positioning rod. The third support block, the guide rail of the second guide rail assembly, and the third cylinder are all fixedly connected to the bottom of the U-shaped support frame. The drive end of the third cylinder is fixedly connected to the slide plate. The slide plate is rotatably connected to the gear cylinder through a bearing. The slide plate is fixedly connected to the slider of the second guide rail assembly. The first gear ring is connected to the translation assembly.

[0015] Furthermore, the translation component includes a threaded rod, two sets of first guide rail assemblies, a second support block, and a fourth support block. The end of the threaded rod near the first support block is coaxially and fixedly connected to the first gear ring. The fourth support block is threadedly connected to the threaded rod through a threaded sleeve. The end of the threaded rod away from the first support block is rotatably connected to the second support block. The second support block is fixedly connected to the bottom of the U-shaped support frame. The guide rails of the two sets of first guide rail assemblies are fixedly connected to the front and rear ends of the top of the frame, respectively. The slider of the first guide rail assembly is fixedly connected to the bottom of the U-shaped support frame.

[0016] Furthermore, the elastic crimping assembly includes a fixed base, a connecting shaft, a pressure plate, a wear-resistant conductive sheet, a torsion spring, a connecting base, and an insulating isolation sheet. The insulating isolation sheet is fixedly installed at one end of the wire winding drum, and the outer wall of the insulating isolation sheet is fixedly connected to the inner wall of the wear-resistant conductive sheet. The end of the wear-resistant conductive sheet away from the wire feeding assembly is fixedly connected to the fixed base. The outer end of the fixed base is rotatably connected to the connecting shaft, and the end of the connecting shaft away from the fixed base is rotatably connected to the connecting base. The torsion spring is sleeved on the part of the connecting shaft located between the connecting base and the fixed base, and both ends of the torsion spring are in contact with the protruding parts of the fixed base and the connecting base, respectively. The end of the connecting base near the wire feeding assembly is fixedly connected to the pressure plate.

[0017] Furthermore, the wire feeding assembly includes a conductive component, a drive feeding component, and an auxiliary conveying component. The drive feeding component is fixedly connected to the cutting machine tool, the drive feeding component is connected to the auxiliary conveying component, the auxiliary conveying component is movably connected to the cutting wire, and the conductive component is located at the end of the drive feeding component near the winding drum. When the pressure plate contacts the drive feeding component, the conductive component is in close contact with the wear-resistant conductive sheet.

[0018] Furthermore, the drive feeding assembly includes a hollow support frame, a first connecting frame, a second cylinder, a sleeve, a first connecting seat, a wire guide tube, an inner tube, and a variable diameter connector. The sleeve and the first connecting frame are both fixedly connected to the cutting machine tool. The second cylinder is fixedly connected to the first connecting frame. The first connecting seat is fixedly connected to the drive end of the second cylinder. The hollow support frame is fixedly connected to the side wall of the first connecting seat near the wire winding drum. The end of the hollow support frame near the wire winding drum is fixedly connected to the variable diameter connector. The end of the variable diameter connector near the wire winding drum is fixedly connected to the wire guide tube. The end of the variable diameter connector away from the first support block is fixedly connected to the inner tube. The outer wall of the inner tube is slidably connected to the inner wall of the sleeve. The inner tube is movably connected to the auxiliary conveying assembly. The end of the variable diameter connector near the wire winding drum is fixedly connected to the conductive assembly. The sleeve, inner tube, variable diameter connector, and wire guide tube are all made of insulating material.

[0019] Furthermore, the conductive component includes a wire and a conductive block. The conductive block is fixedly installed on the end of the variable diameter connector near the winding drum. The side wall of the conductive block is electrically connected to the wire. The top of the end of the conduit and the conductive block near the hollow support frame are both provided with inclined grooves. The conduit and the conductive block are in contact with the wear-resistant conductive sheet through the inclined grooves.

[0020] A monitoring method for a convenient automatic wire feeding EDM wire take-up and unload device includes the following steps:

[0021] Step 1: The rotation trajectory of the take-up and unwind assembly driving the elastic crimping assembly is aligned with the wire feeding assembly. The adjustable linkage assembly and translation assembly are adjusted to the disconnected state. The take-up and unwind assembly rotates until there is no cutting wire on the outside of the elastic crimping assembly, and the outside of the elastic crimping assembly is exposed.

[0022] Step 2: The wire feeding assembly contacts the elastic crimping assembly. Unlock the elastic crimping assembly and pull the cutting wire out of the elastic crimping assembly until it is separated from the processed workpiece. Then, place the workpiece to be processed into the processing position. The cutting machine tool pushes the end of the cutting wire into the elastic crimping assembly through the wire feeding assembly.

[0023] Step 3: Determine if there is current in the external power source. If yes, the cutting wire, elastic crimping assembly, wire feeding assembly, and external power source form a closed loop, and proceed to Step 5. If no, the elastic crimping assembly, wire feeding assembly, and external power source do not form a closed loop, and proceed to Step 4.

[0024] Step 4: The cutting machine continues to push the cutting wire, repeating step 3;

[0025] Step 5: The winding end of the unwinding assembly continues to rotate three times, and the cutting wire rotates three times around the outer end of the elastic pressing assembly. Then, the adjustable linkage assembly and the translation assembly are adjusted to the linkage state to perform cutting.

[0026] This invention has the following technical effects: During normal cutting, the adjustable linkage component and translation component of the adjustable take-up and unwind assembly are adjusted to the linkage state. The take-up and unwind assembly rotates to rewind. Simultaneously, the take-up and unwind assembly drives the translation component to rotate through the adjustable linkage component, and the translation component drives the take-up and unwind assembly to move through the adjustable linkage component, realizing automatic cutting by moving and rewinding simultaneously. When changing workpieces, the rotation trajectory of the elastic pressing component driven by the take-up and unwind assembly is aligned with the wire feeding component. The adjustable linkage component and translation component are adjusted to the disconnected state. The take-up and unwind assembly rotates until there is no cutting wire outside the elastic pressing component, and the outer side of the elastic pressing component is exposed. The wire feeding component contacts the elastic pressing component to unlock the elastic pressing component, and the cutting wire is pulled out from the elastic pressing component until it separates from the processed workpiece. Then, the workpiece to be processed is placed... Once positioned in the processing position, the cutting machine pushes the cutting wire end into the elastic pressing assembly via the wire feeding assembly. The cutting wire, elastic pressing assembly, wire feeding assembly, and external power supply form a closed loop, allowing detection of the cutting wire's position within the elastic pressing assembly. This facilitates monitoring whether the cutting wire end is properly positioned. Next, the wire feeding assembly and elastic pressing assembly separate, with the elastic pressing assembly securing the cutting wire end to the take-up end of the take-up / untake-down assembly. The take-up end of the take-up / untake-down assembly then rotates three more times, causing the cutting wire to rotate three times around the outer end of the elastic pressing assembly. These three rotations of the cutting wire press the elastic pressing assembly firmly, preventing it from opening during rotation and avoiding separation of the cutting wire end from the elastic pressing assembly. The cutting wire end is then securely fixed. Finally, the adjustable linkage assembly and translation assembly are adjusted to the linkage state for continued cutting, achieving automatic wire feeding for practical use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0028] Figure 1 This invention provides a three-dimensional EDM wire feeding and take-up / unloading device for convenient automatic wire feeding. Figure 1 ;

[0029] Figure 2This is a front view of an EDM (Electrical Discharge and Take-up) device for convenient automatic wire feeding according to the present invention.

[0030] Figure 3 This is a left view of an EDM (Electrical Discharge and Take-up) device for convenient automatic wire feeding according to the present invention.

[0031] Figure 4 This invention provides a three-dimensional EDM wire feeding and take-up / unloading device for convenient automatic wire feeding. Figure 2 ;

[0032] Figure 5 This invention provides a three-dimensional EDM wire feeding and take-up / unloading device for convenient automatic wire feeding. Figure 3 ;

[0033] Figure 6 This invention provides a three-dimensional EDM wire feeding and take-up / unloading device for convenient automatic wire feeding. Figure 4 ;

[0034] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0035] Figure 8 Three-dimensional wire feeding assembly Figure 1 ;

[0036] Figure 9 Three-dimensional wire feeding assembly Figure 2 ;

[0037] Figure 10 For along Figure 2 A sectional view along the AA direction;

[0038] Figure 11 for Figure 10 Enlarged view at point D;

[0039] Figure 12 This is a schematic diagram of the flexible compression assembly structure;

[0040] Figure 13 For along Figure 3 BB direction sectional view.

[0041] The labels in the diagram represent:

[0042] 1. Frame; 2. Wire feeding assembly; 21. Wire conductor; 22. Hollow support frame; 23. First cylinder; 24. First connecting frame; 25. Second cylinder; 26. Sleeve; 27. First motor; 28. Conductive block; 29. ​​First connecting seat; 210. Lower groove; 211. Wire guide tube; 212. First support frame; 213. Pressure roller; 214. Upper straight groove; 215. Inner tube; 216. Inclined groove; 217. Drive wheel; 218. Variable diameter connector; 3. Adjustable take-up and unwinding assembly; 31. Threaded rod; 32. Synchronous belt; 33. First support block; 34. U-shaped support frame; 35. Wire winding drum; 36. 37. Second motor; 38. First guide rail assembly; 39. First synchronous pulley; 30. First gear; 310. Second support block; 311. Gear cylinder; 312. Hanging lug; 313. Third support block; 314. Second guide rail assembly; 315. Positioning rod; 316. Second synchronous pulley; 317. First horizontal shaft; 318. Second horizontal shaft; 319. First gear ring; 320. Slide plate; 321. Third cylinder; 322. Fourth support block; 41. Elastic pressing assembly; 42. Fixed seat; 43. Connecting shaft; 44. Pressure plate; 45. Wear-resistant conductive sheet; 46. Torsion spring; 47. Connecting seat; 48. Insulating isolation sheet. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] The present invention will be further described below with reference to embodiments.

[0045] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0046] Example 1: Please refer to Figures 1-13 An electric spark wire feeding and take-up device for convenient automatic wire feeding, including a frame 1;

[0047] An adjustable take-up and unwind assembly 3 for take-up and unwinding is connected to the top of the frame 1;

[0048] The adjustable take-up and unwind assembly 3 includes a take-up and unwind assembly, an adjustable linkage assembly, and a translation assembly. The translation assembly is fixedly connected to the frame 1, the adjustable linkage assembly is connected to the take-up and unwind assembly, and the adjustable linkage assembly is fixedly connected to the translation assembly. When changing workpieces, the adjustable linkage assembly and the translation assembly are adjusted to a disconnected state, and the take-up and unwind assembly only rotates. When cutting, the adjustable linkage assembly and the translation assembly are adjusted to a linkage state, and the take-up and unwind assembly rotates and moves at the same time.

[0049] The winding end of the unwinding assembly is fixedly connected to an elastic crimping assembly 4 for fixing the end of the cutting wire;

[0050] The side of the frame 1 near the cutting machine tool is connected to a wire feeding assembly 2 for feeding the cutting wire to the elastic pressing assembly 4. The wire feeding assembly 2 is movably connected to the elastic pressing assembly 4. When the cutting wire contacts the elastic pressing assembly 4, the cutting wire, the elastic pressing assembly 4, and the wire feeding assembly 2 form a closed loop. The system detects whether the cutting wire is located inside the elastic pressing assembly 4. The cutting wire is connected to the negative terminal of the external power supply, and the wire feeding assembly 2 is connected to the positive terminal of the external power supply.

[0051] During normal cutting, the adjustable linkage component and translation component of the adjustable take-up and unwind assembly 3 are adjusted to the linkage state. The take-up and unwind assembly rotates to wind up. At the same time, the take-up and unwind assembly drives the translation component to rotate through the adjustable linkage component. The translation component drives the take-up and unwind assembly to move through the adjustable linkage component, so that the take-up and unwind assembly can move and wind up and unwind at the same time, thus achieving automatic cutting.

[0052] When changing workpieces, the rotation trajectory of the take-up and unwind assembly driving the elastic pressing assembly 4 is aligned with the wire feeding assembly 2. The adjustable linkage assembly and translation assembly are adjusted to the disconnected state. The take-up and unwind assembly rotates until there is no cutting wire outside the elastic pressing assembly 4, and the outer side of the elastic pressing assembly 4 is exposed. The wire feeding assembly 2 contacts the elastic pressing assembly 4, unlocking the elastic pressing assembly 4 and pulling the cutting wire out of the elastic pressing assembly 4 until it separates from the processed workpiece. Then, the workpiece to be processed is placed in the processing position, and the cutting machine pushes the end of the cutting wire into the elastic pressing assembly 4 through the wire feeding assembly 2. The cutting wire, the elastic pressing assembly 4, the wire feeding assembly 2, and the external power supply form a closed loop, which can detect the cutting. The wire is located inside the elastic crimping assembly 4, making it easy to determine whether the end of the cutting wire is within the elastic crimping assembly 4. Then, the wire feeding assembly 2 and the elastic crimping assembly 4 separate, and the elastic crimping assembly 4 fixes the end of the cutting wire to the take-up end of the take-up and unwinding assembly. Then, the take-up end of the take-up and unwinding assembly continues to rotate three times, and the cutting wire rotates three times around the outer end of the elastic crimping assembly 4. The three rotations of the cutting wire press the elastic crimping assembly 4 tightly, preventing the elastic crimping assembly 4 from opening during rotation and avoiding the separation of the end of the cutting wire from the elastic crimping assembly 4. The end of the cutting wire is fixed. Then, the adjustable linkage assembly and the translation assembly are adjusted to the linkage state to continue cutting, realizing automatic wire feeding, which is beneficial for practical use.

[0053] Please see Figures 1-7 , Figure 13 The winding and unwinding assembly includes a U-shaped support frame 34, a winding drum 35, and a second motor 36. The second motor 36 is fixedly installed on the side wall of the U-shaped support frame 34. The two ends of the winding drum 35 are rotatably connected to the inner wall of the mounting groove opened in the U-shaped support frame 34 through bearings. The winding drum 35 is fixedly connected to the drive end of the second motor 36. The adjustable linkage assembly is fixedly connected to the winding drum 35. The U-shaped support frame 34 is fixedly connected to the translation assembly.

[0054] The adjustable linkage assembly includes a timing belt 32, a first support block 33, a first timing pulley 38, a first gear 39, a gear cylinder 311, a lug 312, a third support block 313, a second guide rail assembly 314, a positioning rod 315, a second timing pulley 316, a first horizontal shaft 317, a second horizontal shaft 318, a first gear ring 319, a sliding plate 320, and a third cylinder 321. The first horizontal shaft 317 is fixedly installed on the end of the winding drum 35 away from the second motor 36. The second timing pulley 31... 6 is fixedly installed on the first horizontal shaft 317. The first synchronous pulley 38 and the second synchronous pulley 316 are meshed with the synchronous belt 32. The second horizontal shaft 318 is fixedly installed in the mounting hole of the first synchronous pulley 38. The second horizontal shaft 318 is rotatably connected to the first support block 33 through a bearing. The first support block 33 is fixedly installed on the bottom end of the U-shaped support frame 34 away from the second motor 36. The end of the second horizontal shaft 318 away from the first support block 33 is coaxially fixedly connected to the first gear 39. The gear cylinder 31 1. Gear cylinder 311 is meshed with the first gear 39 and the first gear ring 319. The top of the end of gear cylinder 311 near the first support block 33 is fixedly connected to the lug 312. The lug 312 is slidably connected to the positioning rod 315 through a sliding hole. The end of positioning rod 315 away from the first support block 33 is fixedly connected to the third support block 313. When the lug 312 is separated from the positioning rod 315, gear cylinder 311 is in a meshed connection with the first gear 39 and the first gear ring 319. When the end of the support block 33 meshes with the middle of the first gear 39, the lug 312 and the positioning rod 315 begin to connect. The third support block 313, the guide rail of the second guide rail assembly 314 and the third cylinder 321 are all fixedly connected to the bottom of the U-shaped support frame 34. The drive end of the third cylinder 321 is fixedly connected to the slide plate 320. The slide plate 320 is rotatably connected to the gear cylinder 311 through the bearing. The slide plate 320 is fixedly connected to the slider of the second guide rail assembly 314. The first gear ring 319 is connected to the translation component.

[0055] The translation component includes a threaded rod 31, two sets of first guide rail assemblies 37, a second support block 310, and a fourth support block 322. The end of the threaded rod 31 near the first support block 33 is coaxially and fixedly connected to the first gear ring 319. The fourth support block 322 is threadedly connected to the threaded rod 31 through a threaded sleeve. The end of the threaded rod 31 away from the first support block 33 is rotatably connected to the second support block 310. The second support block 310 is fixedly connected to the bottom of the U-shaped support frame 34. The guide rails of the two sets of first guide rail assemblies 37 are fixedly connected to the front and rear ends of the top of the frame 1, respectively. The slider of the first guide rail assembly 37 is fixedly connected to the bottom of the U-shaped support frame 34.

[0056] During normal cutting, the third cylinder 321 of the adjustable linkage component of the adjustable take-up and unwind assembly 3 drives the slide plate 320 to move along the second guide rail assembly 314. The slide plate 320 drives the gear cylinder 311 to move towards the first gear 39. The gear cylinder 311 moves to mesh with the first gear 39. When the gear cylinder 311 moves to the end of the first gear 39 near the first support block 33, the lug 312 and the positioning rod 315 are in a disengaged state. The threaded rod 31 of the gear cylinder 311 and the translation component is adjusted to a linkage state. The second motor 36 of the take-up and unwind assembly drives the winding drum 35 to rotate. The winding drum 35 rotates to wind up the wire. At the same time, the winding drum 35 of the take-up and unwind assembly drives the first horizontal shaft 317 of the adjustable linkage component to rotate. 7 drives the second synchronous pulley 316 to rotate, the second synchronous pulley 316 drives the first synchronous pulley 38 to rotate via the synchronous belt 32, the first synchronous pulley 38 drives the second horizontal shaft 318 to rotate, the second horizontal shaft 318 drives the first gear 39 to rotate, the first gear 39 drives the gear cylinder 311 to rotate, the gear cylinder 311 drives the first gear ring 319 to rotate, the first gear ring 319 drives the threaded rod 31 of the translation component to rotate, and with the fourth support block 322 stationary, the third cylinder 321 drives the second support block 310 to move, the second support block 310 drives the U-shaped support frame 34 to move via the first guide rail assembly 37, the U-shaped support frame 34 drives the wire winding drum 35 to move, so that the wire winding drum 35 moves while winding and unwinding, realizing automatic cutting.

[0057] When changing workpieces, the rotation trajectory of the winding and unwinding assembly driving the elastic pressing assembly 4 is aligned with the wire feeding assembly 2. The third cylinder 321 of the adjustable linkage assembly drives the slide plate 320 to move away from the first support block 33 along the second guide rail assembly 314. The slide plate 320 drives the gear cylinder 311 to move towards the first gear ring 319. The end of the gear cylinder 311 near the first support block 33 moves to the middle of the first gear 39. The gear cylinder 311 drives the lug 312 to connect with the positioning rod 315. The gear cylinder 311 continues to move until it separates from the first gear 39. At this time, the third support block 313 and the positioning rod 315 cooperate to lock the gear cylinder 311, ensuring that the gear cylinder 311 does not rotate when the winding drum 35 rotates. At the same time, when the first gear 39 rotates to the disengaged state, it ensures that the first gear 39 and the first gear ring 319 are in the disengaged state, realizing that the first gear 39 and the first gear ring 319 are always in the set state of transmission. The threaded rod 31 of the first gear 39 and the translation component is adjusted to the disengaged state. At this time, the winding and unwinding components only rotate, and the second motor 36 drives the winding drum 35 to rotate. The wire winding spool 35 rotates the elastic pressing assembly 4 until there is no cutting wire on the outside of the elastic pressing assembly 4, and the outside of the elastic pressing assembly 4 is exposed. The wire feeding assembly 2 contacts the elastic pressing assembly 4, unlocking the elastic pressing assembly 4. The cutting machine tool pulls the cutting wire out of the elastic pressing assembly 4 until it separates from the processed workpiece. Then, the workpiece to be processed is placed in the processing position, and the cutting machine tool pushes the end of the cutting wire into the elastic pressing assembly 4 through the wire feeding assembly 2. The wire feeding assembly 2 and the elastic pressing assembly 4 separate, and the elastic pressing assembly 4 pulls the cutting wire out of the elastic pressing assembly 4. The end is fixed to the winding drum 35 of the take-up and unwinding assembly. Then, the second motor 36 of the take-up and unwinding assembly drives the winding end of the winding drum 35 to continue rotating three times. The cutting wire rotates three times around the outer end of the elastic pressing assembly 4. The elastic pressing assembly 4 is pressed tightly by the three turns of the cutting wire to prevent the elastic pressing assembly 4 from opening when rotating, and to avoid the phenomenon of the cutting wire end separating from the elastic pressing assembly 4. The cutting wire end is fixed. Then, the adjustable linkage assembly and the translation assembly are adjusted to the linkage state to continue cutting, realizing automatic wire feeding, which is beneficial to practical use.

[0058] Please see Figure 10 , Figure 12The elastic pressing assembly 4 includes a fixed base 41, a connecting shaft 42, a pressure plate 43, a wear-resistant conductive sheet 44, a torsion spring 45, a connecting base 46, and an insulating isolation sheet 47. The insulating isolation sheet 47 is fixedly installed at one end of the wire winding drum 35. The outer wall of the insulating isolation sheet 47 is fixedly connected to the inner wall of the wear-resistant conductive sheet 44. The end of the wear-resistant conductive sheet 44 away from the wire feeding assembly 2 is fixedly connected to the fixed base 41. The outer end of the fixed base 41 is rotatably connected to the connecting shaft 42. The end of the connecting shaft 42 away from the fixed base 41 is rotatably connected to the connecting base 46. The torsion spring 45 is sleeved on the part of the connecting shaft 42 located between the connecting base 46 and the fixed base 41. The two ends of the torsion spring 45 are respectively in contact with the protruding parts of the fixed base 41 and the connecting base 46. The end of the connecting base 46 near the wire feeding assembly 2 is fixedly connected to the pressure plate 43.

[0059] When a workpiece needs to be changed, the second motor 36 drives the wire winding drum 35 to rotate. The wire winding drum 35 drives the elastic pressing assembly 4 to rotate until there is no cutting wire on the outside of the pressure plate 43, the outside of the pressure plate 43 is exposed, and the pressure plate 43 is vertically downward. The wire feeding assembly 2 moves to the inner wall of the pressure plate 43 and drives the pressure plate 43 to rotate. The pressure plate 43 drives the connecting seat 46 to rotate along the connecting shaft 42. The torsion spring 45 is in a compressed state, unlocking the pressure plate 43. The cutting machine tool pulls the cutting wire out of the pressure plate 43 until it is separated from the processed workpiece. Then, the workpiece to be processed is placed in the processing position. The cutting machine tool pushes the end of the cutting wire into the pressure plate 43 through the wire feeding assembly 2. The cutting wire, the wear-resistant conductive sheet 44, the wire feeding assembly 2, and the external power supply form a closed circuit to generate current, indicating that the cutting wire is located inside the pressure plate 43. If no current is generated when component 2 and the external power supply do not form a closed circuit, it indicates that the cutting wire is not inside the pressure plate 43. This makes it easy to determine whether the end of the cutting wire is inside the pressure plate 43. The wire feeding assembly 2 and the pressure plate 43 separate. The restoring force of the torsion spring 45 drives the connecting seat 46 to rotate along the connecting shaft 42. The connecting seat 46 drives the pressure plate 43 to rotate. The pressure plate 43 presses the end of the cutting wire onto the outer wall of the wear-resistant conductive sheet 44, fixing the end of the cutting wire onto the winding drum 35 of the winding assembly. Then the winding drum 35 continues to rotate three times, and the cutting wire rotates three times around the outer end of the pressure plate 43. The three rotations of the cutting wire press the pressure plate 43 tightly, preventing the pressure plate 43 from opening during rotation and avoiding the separation of the end of the cutting wire from the pressure plate 43. The cutting wire end is effectively fixed, which facilitates the automatic loading and unloading of the cutting wire end and allows for the detection of whether the end of the cutting wire is inside the pressure plate 43.

[0060] Please see Figure 3 , Figures 8-11The wire feeding assembly 2 includes a conductive component, a drive feeding assembly, and an auxiliary conveying assembly. The drive feeding assembly is fixedly connected to the cutting machine tool, the drive feeding assembly is connected to the auxiliary conveying assembly, and the auxiliary conveying assembly is movably connected to the cutting wire. The conductive component is located at the end of the drive feeding assembly near the winding drum 35. When the pressure plate 43 contacts the drive feeding assembly, the conductive component is in close contact with the wear-resistant conductive sheet 44.

[0061] The drive feeding assembly includes a hollow support frame 22, a first connecting frame 24, a second cylinder 25, a sleeve 26, a first connecting seat 29, a wire guide tube 211, an inner tube 215, and a reducing connector 218. The sleeve 26 and the first connecting frame 24 are both fixedly connected to the cutting machine tool. The second cylinder 25 is fixedly connected to the first connecting frame 24. The first connecting seat 29 is fixedly connected to the drive end of the second cylinder 25. The hollow support frame 22 is fixedly connected to the first connecting seat 29 near the side wall of the wire winding drum 35. The end of the hollow support frame 22 near the wire winding drum 35... The variable diameter connector 218 is fixedly connected to the wire winding drum 35. The end of the variable diameter connector 218 near the wire winding drum 35 is fixedly connected to the wire guide tube 211. The end of the variable diameter connector 218 away from the first support block 33 is fixedly connected to the inner tube 215. The outer wall of the inner tube 215 is slidably connected to the inner wall of the sleeve 26. The inner tube 215 is movably connected to the auxiliary conveying component. The end of the variable diameter connector 218 near the wire winding drum 35 is fixedly connected to the conductive component. The sleeve 26, the inner tube 215, the variable diameter connector 218 and the wire guide tube 211 are all made of insulating material.

[0062] The conductive component includes a wire 21 and a conductive block 28. The conductive block 28 is fixedly installed on the end of the variable diameter connector 218 near the winding drum 35. The side wall of the conductive block 28 is electrically connected to the wire 21. The top of the end of the conduit 211 and the conductive block 28 near the hollow support frame 22 are both provided with inclined grooves 216. The conduit 211 and the conductive block 28 are in contact with the wear-resistant conductive sheet 44 through the inclined grooves 216.

[0063] Wire 21 is connected to the positive terminal of an external power source;

[0064] The auxiliary conveying assembly includes a first cylinder 23, a first motor 27, a first support frame 212, and a pressure roller 213. The first support frame 212 is fixedly installed on the top of the hollow support frame 22. The first cylinder 23 is fixedly installed on the top of the first support frame 212. The driving end of the first cylinder 23 is rotatably connected to the pressure roller 213 through a fixedly connected connecting frame. The top of the inner tube 215 is provided with an upper straight groove 214, and the pressure roller 213 moves within the upper straight groove 214. The first motor 27 is fixedly installed on the outer wall of the hollow support frame 22. The driving end of the first motor 27 is fixedly connected to the driving wheel 217. The bottom of the inner tube 215 is provided with a lower groove 210, and the lower groove 210 is slidably connected to the driving wheel 217.

[0065] During cutting, the first cylinder 23 of the auxiliary conveying component of the wire feeding assembly 2 drives the pressure roller 213 to move upward along the upper straight groove 214, and the pressure roller 213 does not contact the cutting wire.

[0066] When a workpiece needs to be changed, the second motor 36 drives the wire winding drum 35 to rotate. The wire winding drum 35 drives the elastic pressing assembly 4 to rotate until there is no cutting wire on the outside of the pressure plate 43, and the outside of the pressure plate 43 is exposed. The second cylinder 25 of the driving feeding assembly drives the first connecting frame 24 to move. The first connecting frame 24 drives the first connecting seat 29 to move. The first connecting seat 29 drives the hollow support frame 22 to move. The hollow support frame 22 drives the inner tube 215, the wire guide tube 211, and the reducing connector 218. The wire guide tube 211 moves to the inner wall of the pressure plate 43, driving the pressure plate 43 to rotate. 3. The connecting seat 46 rotates along the connecting shaft 42, and the torsion spring 45 is in a compressed state, unlocking the pressure plate 43. The cutting machine tool pulls the cutting wire out of the pressure plate 43. The cutting wire passes through the conduit 211, the reducing connector 218, the inner tube 215, and the sleeve 26 until it separates from the processed workpiece. Then, the workpiece to be processed is placed in the processing position. The cutting machine tool pushes the end of the cutting wire into the pressure plate 43 through the conduit 211, the reducing connector 218, the inner tube 215, and the sleeve 26. The cutting wire, the wear-resistant conductive sheet 44, the inclined groove 216, the wire 21, and the outside are all separated. The power supply forms a closed loop. When the external power source generates current, the cutting wire is located inside the pressure plate 43. When there is no current from the external power source, the cutting wire is not located inside the pressure plate 43, making it easy to determine whether the end of the cutting wire is inside the pressure plate 43. The second cylinder 25 drives the first connecting frame 24 to move, the first connecting frame 24 drives the first connecting seat 29 to move, the first connecting seat 29 drives the hollow support frame 22 to move, and the hollow support frame 22 drives the inner tube 215, the wire guide tube 211, and the reducing connector 218. The wire guide tube 211 separates from the pressure plate 43, and the restoring force of the torsion spring 45 drives the connecting seat 46 along the connecting shaft. 42 rotates, and the connecting shaft 42 drives the pressure plate 43 to rotate. The pressure plate 43 presses the end of the cutting wire onto the outer wall of the wear-resistant conductive sheet 44, fixing the end of the cutting wire onto the winding drum 35 of the winding assembly. Then the winding drum 35 continues to rotate three times, and the cutting wire rotates three times around the outer end of the pressure plate 43. The pressure plate 43 is pressed tightly by the three turns of the cutting wire, preventing the pressure plate 43 from opening when rotating, avoiding the phenomenon of the cutting wire end separating from the pressure plate 43. The cutting wire end is fixed, which facilitates the automatic loading and unloading of the cutting wire end, and can also detect whether the cutting wire end is located inside the pressure plate 43.

[0067] As the winding drum 35 continues to rotate three times, the first cylinder 23 drives the pressure roller 213 to move downward along the upper straight groove 214 until it contacts the cutting wire. The first motor 27 drives the drive wheel 217 to rotate. The drive wheel 217 and the pressure roller 213 work together to drive the cutting wire to move towards the winding drum 35. When the cutting wire is wrapped around the outside of the pressure plate 43, the tension of the pressure plate 43 on the cutting wire is reduced, which can prevent the pressure plate 43 from separating from the cutting wire due to the low pressure of the pressure plate 43 on the cutting wire when the pressure plate 43 rotates.

[0068] Example 2: Please refer to Figures 1-13 As a preferred embodiment of the present invention, and to better achieve the objectives of the present invention, the present invention also provides a monitoring method for an automatic electrical discharge machining (EDM) wire feeding and take-up / unloading device, comprising the following steps:

[0069] Step 1: The rotation trajectory of the take-up and unwind assembly driving the elastic crimping assembly 4 is aligned with the wire feeding assembly 2. The adjustable linkage assembly and translation assembly are adjusted to the disconnected state. The take-up and unwind assembly rotates until there is no cutting wire on the outside of the elastic crimping assembly 4, and the outside of the elastic crimping assembly 4 is exposed.

[0070] Step 2: The wire feeding assembly 2 contacts the elastic crimping assembly 4 to unlock the elastic crimping assembly 4, and the cutting wire is pulled out from the elastic crimping assembly 4 until it is separated from the processed workpiece. Then, the workpiece to be processed is placed in the processing position, and the cutting machine tool pushes the end of the cutting wire into the elastic crimping assembly 4 through the wire feeding assembly 2.

[0071] Step 3: Determine if there is current in the external power source. If yes, the cutting wire, elastic crimping assembly 4, wire feeding assembly 2, and external power source form a closed loop, and proceed to step 5. If no, the elastic crimping assembly 4, wire feeding assembly 2, and external power source do not form a closed loop, and proceed to step 4.

[0072] Step 4: The cutting machine continues to push the cutting wire, repeating step 3;

[0073] Step 5: The winding end of the unwinding assembly continues to rotate three times, and the cutting wire rotates three times around the outer end of the elastic pressing assembly 4. Then, the adjustable linkage assembly and the translation assembly are adjusted to the linkage state to perform cutting.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A convenient automatic wire feeding electric spark wire feeding and collecting device, comprising a rack (1), characterized in that: the top of the rack (1) is connected with an adjustable wire feeding and collecting assembly (3) for wire feeding and collecting; the adjustable wire feeding and collecting assembly (3) comprises a wire feeding and collecting assembly, an adjustable linkage assembly and a translation assembly, the translation assembly is fixedly connected with the rack (1), the adjustable linkage assembly is connected with the wire feeding and collecting assembly, and the adjustable linkage assembly is fixedly connected with the translation assembly; when the workpiece is replaced, the adjustable linkage assembly and the translation assembly are adjusted to a disengaged state, and the wire feeding and collecting assembly only rotates; when cutting, the adjustable linkage assembly and the translation assembly are adjusted to an engaged state, and the wire feeding and collecting assembly rotates while moving; the end of the winding end of the wire feeding and collecting assembly is fixedly connected with an elastic pressure contact assembly (4) for fixing the end of the cutting wire; the side of the rack (1) close to the cutting machine tool is connected with a wire feeding assembly (2) for feeding the cutting wire to the elastic pressure contact assembly (4), the wire feeding assembly (2) is movably connected with the elastic pressure contact assembly (4), the cutting wire, the elastic pressure contact assembly (4) and the wire feeding assembly (2) form a closed loop when the cutting wire contacts the elastic pressure contact assembly (4), the cutting wire is connected with the negative pole of the external power supply, and the wire feeding assembly (2) is connected with the positive pole of the external power supply; the elastic pressure contact assembly (4) comprises a fixed seat (41), a connecting shaft (42), a pressure plate (43), a wear-resistant conductive sheet (44), a torsional spring (45), a connecting seat (46) and an insulating isolation sheet (47), the insulating isolation sheet (47) is fixedly installed at one end of the wire winding drum (35), the outer wall of the insulating isolation sheet (47) is fixedly connected with the inner wall of the wear-resistant conductive sheet (44), the end of the wear-resistant conductive sheet (44) away from the wire feeding assembly (2) is fixedly connected with the fixed seat (41), the outer end of the fixed seat (41) is rotatably connected with the connecting shaft (42), the end of the connecting shaft (42) away from the fixed seat (41) is rotatably connected with the connecting seat (46), the torsional spring (45) is sleeved on the connecting shaft (42) between the connecting seat (46) and the fixed seat (41), and the two ends of the torsional spring (45) are in contact with the protruding parts of the fixed seat (41) and the connecting seat (46) respectively, and the end of the connecting seat (46) close to the wire feeding assembly (2) is fixedly connected with the pressure plate (43); the wire feeding assembly (2) comprises a conductive assembly, a driving feeding assembly and an auxiliary conveying assembly, the driving feeding assembly is fixedly connected with the cutting machine tool, the driving feeding assembly is connected with the auxiliary conveying assembly, the auxiliary conveying assembly is movably connected with the cutting wire, the conductive assembly is located at the end of the driving feeding assembly close to the wire winding drum (35), and the conductive assembly is in contact with the wear-resistant conductive sheet (44) when the pressure plate (43) contacts the driving feeding assembly.

2. The electric spark wire feeding and withdrawing device according to claim 1, wherein The winding and unwinding assembly comprises a U-shaped support frame (34), a wire winding drum (35) and a second motor (36), the second motor (36) is fixedly installed on the side wall of the U-shaped support frame (34), the wire winding drum (35) is rotatably connected with the inner wall of the mounting groove of the U-shaped support frame (34) through bearings at both ends, the wire winding drum (35) is fixedly connected with the driving end of the second motor (36), the adjustable linkage assembly is fixedly connected with the wire winding drum (35), and the U-shaped support frame (34) is fixedly connected with the translation assembly.

3. The electric spark wire feeding and withdrawing device according to claim 2, wherein The adjustable linkage assembly comprises a synchronous belt (32), a first supporting block (33), a first synchronous wheel (38), a first gear (39), a toothed cylinder (311), a lug (312), a third supporting block (313), a second guide rail assembly (314), a positioning rod (315), a second synchronous wheel (316), a first horizontal shaft (317), a second horizontal shaft (318), a first gear ring (319), a sliding plate (320) and a third cylinder (321), the first horizontal shaft (317) is fixedly installed on the end of the wire winding drum (35) away from the second motor (36), the second synchronous wheel (316) is fixedly installed on the first horizontal shaft (317), the first synchronous wheel (38) and the second synchronous wheel (316) are in meshing connection with the synchronous belt (32), the second horizontal shaft (318) is fixedly installed in the mounting hole of the first synchronous wheel (38), the second horizontal shaft (318) is rotatably connected with the first supporting block (33) through bearings, the first supporting block (33) is fixedly installed on the bottom of the end of the U-shaped support frame (34) away from the second motor (36), the end of the second horizontal shaft (318) away from the first supporting block (33) is fixedly connected with the first gear (39) in a coaxial manner, the toothed cylinder (311) is in meshing connection with the first gear (39) and the first gear ring (319), the top of the end of the toothed cylinder (311) close to the first supporting block (33) is fixedly connected with the lug (312), the lug (312) is slidingly connected with the positioning rod (315) in abutment through a sliding hole, the end of the positioning rod (315) away from the first supporting block (33) is fixedly connected with the third supporting block (313), when the lug (312) is separated from the positioning rod (315), the toothed cylinder (311) is in meshing connection with the first gear (39) and the first gear ring (319), when the end of the toothed cylinder (311) close to the first supporting block (33) is in meshing connection with the middle end of the first gear (39), the lug (312) starts to be connected with the positioning rod (315), the third supporting block (313), the guide rails of the second guide rail assembly (314) and the third cylinder (321) are all fixedly connected with the bottom of the U-shaped support frame (34), the driving end of the third cylinder (321) is fixedly connected with the sliding plate (320), the sliding plate (320) is rotatably connected with the toothed cylinder (311) through bearings, the sliding plate (320) is fixedly connected with the sliding block of the second guide rail assembly (314), and the first gear ring (319) is connected with the translation assembly.

4. The electric spark wire feeding and withdrawing device according to claim 3, wherein The translation assembly comprises a threaded rod (31), two groups of first guide rail assemblies (37), a second support block (310) and a fourth support block (322), the threaded rod (31) is coaxially and fixedly connected with the first gear ring (319) at the end close to the first support block (33), the fourth support block (322) is threadedly connected with the threaded rod (31) through a threaded sleeve, the end of the threaded rod (31) away from the first support block (33) is rotationally connected with the second support block (310), the second support block (310) is fixedly connected with the bottom of the U-shaped support frame (34), the guide rails of the two groups of first guide rail assemblies (37) are fixedly connected with the top of the rack (1) at the front and rear ends, respectively, and the sliders of the first guide rail assemblies (37) are fixedly connected with the bottom of the U-shaped support frame (34).

5. The electric spark wire feeding and withdrawing device according to claim 2, wherein The driving feeding assembly comprises a hollow support frame (22), a first connecting frame (24), a second air cylinder (25), a sleeve (26), a first connecting seat (29), a wire tube (211), an inner tube (215) and a variable-diameter connector (218), the sleeve (26) and the first connecting frame (24) are fixedly connected with the cutting machine, the second air cylinder (25) is fixedly connected with the first connecting frame (24), the first connecting seat (29) is fixedly connected with the driving end of the second air cylinder (25), the first connecting seat (29) is fixedly connected with the hollow support frame (22) on the side wall close to the yarn winding drum (35), the end of the hollow support frame (22) close to the yarn winding drum (35) is fixedly connected with the variable-diameter connector (218), the end of the variable-diameter connector (218) close to the yarn winding drum (35) is fixedly connected with the wire tube (211), the end of the variable-diameter connector (218) away from the first support block (33) is fixedly connected with the inner tube (215), the outer wall of the inner tube (215) is slidingly connected with the inner wall of the sleeve (26), the inner tube (215) is movably connected with the auxiliary conveying assembly, the end of the variable-diameter connector (218) close to the yarn winding drum (35) is fixedly connected with the conductive assembly, and the sleeve (26), the inner tube (215), the variable-diameter connector (218) and the wire tube (211) are all made of insulating materials; The auxiliary conveying assembly comprises a first air cylinder (23), a first motor (27), a first support frame (212) and a pressure roller (213), the first support frame (212) is fixedly installed on the top of the hollow support frame (22), the first air cylinder (23) is fixedly installed on the top of the first support frame (212), the driving end of the first air cylinder (23) is rotationally connected with the pressure roller (213) through a fixedly connected connecting frame, an upper straight groove (214) is formed in the top of the inner tube (215), and the pressure roller (213) is movable in the upper straight groove (214), the first motor (27) is fixedly installed on the outer wall of the hollow support frame (22), the driving end of the first motor (27) is fixedly connected with a driving wheel (217), and a lower recess (210) is formed in the bottom of the inner tube (215), and the lower recess (210) is slidingly connected with the driving wheel (217).

6. The electric spark wire feeding and withdrawing device according to claim 5, wherein The conductive assembly comprises a wire (21) and a conductive block (28), the conductive block (28) is fixedly installed on the end of the variable diameter connector (218) close to the wire winding drum (35), the side wall of the conductive block (28) is electrically connected with the wire (21), the wire tube (211) and the end of the top of the conductive block (28) close to the hollow support frame (22) are both provided with an inclined groove (216), and the wire tube (211) and the conductive block (28) are both in contact with the wear-resistant conductive sheet (44) through the inclined groove (216).

7. A method of monitoring an electric spark wire feeding and withdrawing device for easy automatic wire feeding as claimed in any one of claims 1 to 6, characterized in that, The method comprises the following steps: Step one: the rotating track of the take-up and pay-off assembly drives the elastic pressure assembly (4) to be opposite to the wire feeding assembly (2), the adjustable linkage assembly and the translation assembly are adjusted to the disengaged state, the take-up and pay-off assembly is rotated to the outside of the elastic pressure assembly (4) without cutting wire, and the outside of the elastic pressure assembly (4) is in the exposed state; Step two: the wire feeding assembly (2) contacts the elastic pressure assembly (4) to unlock the elastic pressure assembly (4), the cutting wire is pulled out of the elastic pressure assembly (4) until the cutting wire is separated from the processed workpiece, then the workpiece to be processed is placed on the processing position, and the cutting machine pushes the end of the cutting wire into the elastic pressure assembly (4) through the wire feeding assembly (2); Step three: it is judged whether there is current in the external power supply, if the judgment is yes, the cutting wire, the elastic pressure assembly (4), the wire feeding assembly (2) and the external power supply form a closed loop, step five is executed, if the judgment is no, the elastic pressure assembly (4), the wire feeding assembly (2) and the external power supply do not form a closed loop, and step four is executed; Step four: the cutting machine continues to push the cutting wire, and step three is repeated; Step five: the take-up end of the take-up and pay-off assembly continues to rotate for three turns, the cutting wire rotates around the outer end of the elastic pressure assembly (4) for three turns, then the adjustable linkage assembly and the translation assembly are adjusted to the linked state for cutting.

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