A wire saw

Abstract

The application discloses a linear cutting machine and belongs to the technical field of cutting equipment. The linear cutting machine comprises a base, a wire feeding assembly and a workbench arranged on the base, and a workpiece to be processed is arranged on the workbench. The wire feeding assembly comprises a wire storage cylinder, an electrode wire, a first extending piece and a second extending piece. The first extending piece and the second extending piece are arranged in parallel and on the upper and lower sides of the workpiece. The electrode wire is partially wound on the wire storage cylinder. The remaining part of the electrode wire can act on the workpiece after being limited by the first extending piece and the second extending piece. The first extending piece comprises a stabilizing piece. The stabilizing piece is in abutment with the electrode wire. The stabilizing piece can buffer the electrode wire and decelerate the instant accelerated electrode wire, so as to reduce the wire vibration of the electrode wire. The stabilizing piece can buffer the electrode wire to reduce the vibration and effectively inhibit the wire vibration when the electrode wire vibrates in the radial direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting equipment, in particular to a wire cutting machine. BACKGROUND

[0002] The wire cutting machine, full name wire-cut electrical discharge machine, is a special processing machine tool that uses high temperature generated by electric spark discharge to etch away metal, thereby achieving the purpose of cutting. It is mainly used for processing various complex-shaped and precise and small workpieces. The basic principle of wire cutting processing is to use a moving thin metal wire as an electrode wire to perform pulse discharge on the workpiece under the action of a pulse power source, so that the local metal on the surface of the workpiece is melted and vaporized instantaneously, thereby being etched away. The workbench or electrode wire is controlled to move along a predetermined trajectory by a numerical control system, and the workpiece is gradually cut into shape.

[0003] The wire cutting machine can be divided into high-speed reciprocating wire cutting machine and low-speed unidirectional wire cutting machine according to the wire speed. Among them, the high-speed reciprocating wire cutting machine has the advantages of high cutting efficiency and low running cost, and is particularly suitable for cutting of large thickness workpieces. However, the electrode wire is prone to wire vibration under the action of high-speed running and high-speed discharge, which will affect the machining precision of the workpiece. The core reason of wire vibration is that the electrode wire tension is insufficient, and the electrode wire is prone to sway when walking. Moreover, the electrode wire on the wire storage cylinder is prone to wire loosening when the wire storage cylinder reverses, and the wire speed of the electrode wire will instantaneously increase when the wire storage cylinder rotates, which will aggravate the wire vibration. SUMMARY

[0004] In view of the above problems, the present application provides a wire cutting machine which can reduce the wire vibration of the electrode wire and ensure the machining precision of the electrode wire.

[0005] The present application protects a kind of wire cutting machine, and the wire cutting machine includes base and the wire walking assembly and workbench being set on the base, the workpiece to be handled is set on the workbench;

[0006] The wire walking assembly includes wire storage cylinder, electrode wire, first extension piece and second extension piece, the first extension piece and the second extension piece are parallelly arranged and arranged on the upper and lower sides of the workpiece, the electrode wire is partially wound on the wire storage cylinder, and the remaining part of the electrode wire can act on the workpiece after being limited by the first extension piece and the second extension piece;

[0007] The first extension piece includes a stabilizing piece, the stabilizing piece is in abutment with the electrode wire, the stabilizing piece can buffer the electrode wire, and the stabilizing piece can also decelerate the instantaneously accelerated electrode wire to reduce the wire vibration of the electrode wire.

[0008] Further, the first extension piece includes a first plate body, a first stabilizing wheel is rotatably arranged on the first plate body, and the stabilizing piece is the first stabilizing wheel.

[0009] The outer circumferential surface of the first stabilizing wheel is provided with a groove, and the surface of the groove is provided with an elastic layer capable of absorbing part of the wire vibration of the electrode wire.

[0010] Further, the material of the elastic layer is perfluoroether rubber material or 60NiTi alloy material.

[0011] Further, the inside of the first stabilizing wheel is provided with a moving part capable of moving in the radial direction, and when the rotation speed of the first stabilizing wheel increases, the moving part moves away from the center of the first stabilizing wheel.

[0012] Further, the inside of the first stabilizing wheel is uniformly provided with a plurality of cavities, each of which is arranged in the radial direction, and a sliding block is arranged in each cavity, and one end of the sliding block is fixedly connected to the bottom wall of the cavity through a spring.

[0013] The moving part is the sliding block.

[0014] Further, the first plate body comprises a first auxiliary wheel arranged between the first stabilizing wheel and the workpiece.

[0015] The first auxiliary wheel can assist in reducing the wire vibration of the electrode wire.

[0016] Further, the first auxiliary wheel comprises a first disc, a cleaning block and a second disc arranged in the vertical direction in sequence.

[0017] The cleaning block is provided with a central hole through which the electrode wire can pass, and a flexible brush is arranged on the hole wall of the central hole and abuts against the side wall of the electrode wire.

[0018] Further, the first disc is also provided with a central hole through which the electrode wire passes.

[0019] Two permanent magnets are symmetrically arranged in the first disc and are arranged on both sides of the electrode wire, and a magnetic field is formed between the two permanent magnets, and when the electrode wire vibrates, the magnetic field can cut the magnetic induction lines and generate an ampere force to reduce the wire vibration of the electrode wire.

[0020] The second disc has the same structure as the first disc, and the direction of the magnetic field in the second disc is different from that in the first disc.

[0021] Further, a spiral channel is arranged in the first disc, and the spiral channel can discharge metal scraps from the central hole of the first disc.

[0022] Further, the second extending piece comprises a second plate body, and the second plate body is provided with a second stabilizing wheel and a second auxiliary wheel, and the second auxiliary wheel is close to the workpiece.

[0023] The second stabilizing wheel has the same structure as the first stabilizing wheel.

[0024] The second auxiliary wheel has the same structure as the first auxiliary wheel.

[0025] Beneficial effects: the stabilizing piece is arranged, when the electrode wire vibrates in the radial direction, the stabilizing piece can buffer the electrode wire to reduce vibration, effectively inhibiting wire vibration. At the same time, when the electrode wire accelerates instantaneously, the stabilizing piece can decelerate the electrode wire, which can prevent the electrode wire from breaking due to instantaneous acceleration, and can prevent the electrode wire from vibrating violently due to too high speed, thereby effectively reducing wire vibration. The present application controls wire vibration from two aspects of preventing wire vibration and buffering the generated wire vibration, which can effectively improve the machining precision. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Among them:

[0028] Figure 1 It is a whole structure schematic diagram of the first angle of the wire cutting machine in an embodiment of the present application;

[0029] Figure 2 It is a whole structure schematic diagram of the second angle of the wire cutting machine in an embodiment of the present application;

[0030] Figure 3 It is a whole structure schematic diagram of the third angle of the wire cutting machine in an embodiment of the present application;

[0031] Figure 4 It is a partial sectional view of the wire cutting machine in an embodiment of the present application;

[0032] Figure 5 It is Figure 4 The local enlarged view of A part;

[0033] Figure 6 It is a partial sectional view of the first stabilizing wheel in an embodiment of the present application;

[0034] Figure 7 It is a partial sectional view of the first auxiliary wheel in an embodiment of the present application;

[0035] Figure 8 This is a schematic diagram of the overall structure of the cleaning block in one embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the overall structure of the first disk in one embodiment of the present invention;

[0037] In the figure, 1 is the wire feeding assembly; 11 is the wire storage cylinder; 12 is the electrode wire; 13 is the first extension piece; 131 is the first plate; 132 is the first guide wheel; 133 is the first stabilizing wheel; 1331 is the groove; 1332 is the cavity; 1333 is the spring; and 1334 is the slider.

[0038] 134. First auxiliary wheel; 1341. First disc; 13411. Spiral channel; 13412. Permanent magnet; 1342. Cleaning block; 13421. Flexible brush; 1343. Second disc; 1344. Fixing sleeve;

[0039] 14. Second protruding part; 141. Second plate; 142. Second guide wheel; 143. Second stabilizing wheel; 144. Second auxiliary wheel;

[0040] 2. Worktable; 21. First movable stage; 211. First slide rail; 212. First table surface; 213. First adjusting shaft; 22. Second movable stage; 221. Second slide rail; 222. Second table surface; 223. Second adjusting shaft;

[0041] 3. Base;

[0042] 4. Workpiece. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] This invention protects a wire EDM machine, which includes a base 3, a wire feeding assembly 1 and a worktable 2 disposed on the base 3, and a workpiece 4 to be processed disposed on the worktable 2.

[0045] The wire feeding assembly 1 includes a wire storage cylinder 11, an electrode wire 12, a first protrusion 13 and a second protrusion 14. The first protrusion 13 and the second protrusion 14 are arranged in parallel and on the upper and lower sides of the workpiece 4. The first protrusion 13 can move in the vertical direction to adapt to workpieces 4 of different heights or thicknesses.

[0046] The electrode wire 12 is partially wound on the wire storage cylinder 11, and the remaining part of the electrode wire 12 can act on the workpiece 4 after being limited by the first extension 13 and the second extension 14.

[0047] The first extension 13 comprises a stabilizer abutting against the electrode wire 12, which can buffer the electrode wire 12 and decelerate the instant accelerated electrode wire 12 to reduce the wire vibration of the electrode wire 12.

[0048] When the electrode wire 12 vibrates, the main vibration direction is the radial direction of the electrode wire 12, and the vibration direction of the electrode wire 12 is mainly the horizontal direction since the electrode wire 12 acting on the workpiece 4 is usually vertically arranged; the instant acceleration direction of the electrode wire 12 is the vertical direction. Therefore, for the convenience of description, the horizontal direction of the electrode wire 12 and the radial direction of the electrode wire 12 refer to the same direction, and the vertical direction of the electrode wire 12 and the axial direction of the electrode wire 12 refer to the same direction. The stabilizer of the present application can buffer the electrode wire 12 to reduce the vibration when the electrode wire 12 vibrates in the radial direction, effectively inhibiting the wire vibration. Meanwhile, the stabilizer can decelerate the electrode wire 12 when the electrode wire 12 instantaneously accelerates, which can prevent the electrode wire 12 from breaking due to instant acceleration, and can prevent the electrode wire 12 from vibrating violently due to too high speed, thereby effectively reducing the wire vibration. The present application controls the wire vibration from two aspects of preventing the wire vibration from occurring and buffering the wire vibration that has occurred, which can effectively improve the machining precision.

[0049] In one specific embodiment, the first extension 13 comprises a first plate body 131, the first plate body 131 is rotationally arranged with a first guide wheel 132 and a first stabilizer wheel 133, and the stabilizer is the first stabilizer wheel 133.

[0050] The outer circumferential surface of the first stabilizer wheel 133 is provided with a groove 1331, and the surface of the groove 1331 is provided with an elastic layer, which can absorb part of the wire vibration of the electrode wire 12. The elastic layer has a large thickness and also has the characteristics of high temperature resistance. According to actual needs, it can be provided in a multi-layer structure, such as a plurality of silicon nitride ceramics with high temperature resistance and heat insulation as the surface layer, and each silicon nitride ceramic is provided with a spring or rubber at the bottom to provide elastic force. It can also be provided in a single layer structure, such as directly selecting a perfluoroether rubber material, which has elasticity and a long-term working temperature above 300℃, and can be suitable for the electrode wire 12. 60NiTi alloy can also be selected, which can almost completely restore to its original shape after being deformed to a large extent, and its recoverable strain is much larger than that of ordinary metals. The high temperature resistance temperature of the 60NiTi alloy is about 540℃. Since the 60NiTi alloy is a metal, the surface friction is small, and in actual application, the surface of the 60NiTi alloy can be roughened or sprayed with high temperature resistant and corrosion resistant paint.

[0051] The embodiment sets the groove 1331, which can limit the electrode wire 12 to a certain extent and reduce the wire vibration. The elastic layer is set on the surface of the groove 1331, which can block the electrode wire 12 in the horizontal direction and reduce the wire vibration of the electrode wire 12 in the horizontal direction. In this way, when the electrode wire 12 vibrates in the horizontal direction, the elastic layer can effectively buffer and consume the energy of the wire vibration, so that the electrode wire 12 can quickly return to a stable state. In addition, the elastic layer has a large thickness, and when the instantaneous speed of the electrode wire 12 in the vertical direction is large, the elastic layer can also be squeezed to deform, which can prevent the vertical speed of the electrode wire 12 from being too fast to cause more intense vibration.

[0052] In one specific embodiment, the first stabilizing wheel 133 is internally provided with a moving part that can move in the radial direction. When the rotation speed of the first stabilizing wheel 133 increases, the moving part moves away from the center of the first stabilizing wheel 133. Specifically, the moving part does not move when the first stabilizing wheel 133 is in the normal speed range. Only when the rotation speed of the first stabilizing wheel 133 exceeds the normal speed, the moving part moves away from the center of the first stabilizing wheel 133 as the rotation speed of the first stabilizing wheel 133 increases. When the rotation speed of the first stabilizing wheel 133 decreases, the moving part returns to the center of the first stabilizing wheel 133. The overall radius of the first stabilizing wheel 133 does not change when the first stabilizing wheel 133 rotates, and only the distance between the moving part and the center of the first stabilizing wheel 133 changes. The moving part can be regarded as a mass point, and the formula for calculating the moment of inertia thereof can be selected as I=mr2, wherein m is the mass of the moving part, and r is the distance between the moving part and the center of the first stabilizing wheel 133. According to the formula, when the moving part moves away from the center of the first stabilizing wheel 133, the moment of inertia of the moving part increases, that is, the overall moment of inertia of the first stabilizing wheel 133 increases.

[0053] In the embodiment, when the instantaneous speed of the electrode wire 12 in the vertical direction increases, the electrode wire 12 drives the rotation speed of the first stabilizing wheel 133 to increase. At this time, the moving part moves away from the center of the first stabilizing wheel 133, so that the moment of inertia of the first stabilizing wheel 133 increases. In this way, the rotation speed of the first stabilizing wheel 133 does not increase significantly, and even decreases, which can effectively control the moving speed of the electrode wire 12 in the vertical direction and prevent more wire vibration. The moving part can be adjusted according to the instantaneous rotation speed of the first stabilizing wheel 133, and the adjustment speed is fast.

[0054] In one specific embodiment, the first stabilizing wheel 133 is internally uniformly provided with a plurality of cavities 1332, each cavity 1332 is arranged in the radial direction, a sliding block 1334 is arranged in each cavity 1332, one end of the sliding block 1334 is fixedly connected with the bottom wall of the cavity 1332 through a spring 1333; the moving part is the sliding block 1334. Wherein, the bottom wall of the cavity 1332 is close to the center of the first stabilizing wheel 133 or the bottom wall of the cavity 1332 is close to the edge of the first stabilizing wheel 133. The spring 1333 is arranged to enable the sliding block 1334 to reset. The moving part is the sliding block 1334.

[0055] In one specific embodiment, the first plate body 131 includes a first auxiliary wheel 134, the first auxiliary wheel 134 is arranged between the first stabilizing wheel 133 and the workpiece 4, the first guide wheel 132, the first stabilizing wheel 133 and the first auxiliary wheel 134 are on the same vertical line, and the first auxiliary wheel 134 can assist in reducing the wire vibration of the electrode wire 12. Wherein, the first auxiliary wheel 134 can have the same structure as the first stabilizing wheel 133 to further increase the running stability of the electrode wire 12; the structure of the first auxiliary wheel 134 can also be different from that of the first stabilizing wheel 133, and a conventional structure for preventing wire vibration is selected.

[0056] In one specific embodiment, the first auxiliary wheel 134 includes a first disc 1341, a cleaning block 1342 and a second disc 1343 arranged in the vertical direction in sequence, and the cleaning block 1342 is preferably made of iron. The cleaning block 1342 is provided with a center hole through which the electrode wire 12 can pass, and a flexible brush 13421 is arranged on the hole wall of the center hole and abuts against the side wall of the electrode wire 12. Wherein the flexible brush 13421 is preferably made of copper, and the root of the flexible brush 13421 is insulated to prevent affecting the electrode wire 12.

[0057] The embodiment has two effects by arranging the flexible brush 13421. The first effect is vibration reduction, the flexible brush 13421 fully wraps the side of the electrode wire 12, and the flexible brush 13421 can buffer the radial wire vibration of the electrode wire 12, reduce the wire vibration, and make up for the disadvantage that the first stabilizing wheel 133 cannot reduce the vibration in individual horizontal directions. The second effect is cleaning, the flexible brush 13421 can clean the metal scraps on the surface of the electrode wire 12, avoid the metal scraps entering other guide wheels, and cause the electrode wire 12 to jump on the guide wheel to generate wire vibration. The flexible brush 13421 is closer to the workpiece 4, and when the electrode wire 12 moves upward, the flexible brush 13421 can clean the electrode wire 12 that has just cut the workpiece 4 as soon as possible, preventing the metal scraps from affecting other components.

[0058] In one embodiment, the first disc 1341 is also provided with a central hole through which the electrode wire 12 passes; two permanent magnets 13412 are symmetrically arranged in the first disc 1341, and are distributed on both sides of the electrode wire 12, and have a magnetic field therebetween; when the electrode wire 12 vibrates, it can cut the magnetic induction lines, and the generated Ampere force can reduce the wire vibration of the electrode wire 12; the second disc 1343 has the same structure as the first disc 1341, and the direction of the magnetic field in the second disc 1343 is different from that in the first disc 1341. Specifically, the direction of the magnetic field in the second disc 1343 is perpendicular to that in the first disc 1341.

[0059] Since the electrode wire 12 can be regarded as a closed coil, and the commonly used electrode wire 12 is made of copper material. In this embodiment, by arranging two permanent magnets 13412, when the electrode wire 12 vibrates in the horizontal direction and cuts the magnetic induction lines in the magnetic field, an induced current will be generated. According to Lenz's law, the magnetic field of the induced current in the electrode wire 12 will hinder its movement, thereby consuming the energy of the wire vibration and effectively reducing the amplitude of the wire vibration. By arranging the magnetic field of the second disc 1343 perpendicular to that of the first disc 1341, the electrode wire 12 will generate an induced current when it vibrates in the horizontal direction, thereby suppressing the wire vibration. By arranging the cleaning block 1342 made of iron, the first disc 1341 and the second disc 1343 can be isolated to prevent the magnetic fields therebetween from affecting each other.

[0060] In one embodiment, the first disc 1341 is provided with a spiral channel 13411, which can discharge metal chips from the central hole of the first disc 1341. By arranging the spiral channel 13411, metal chips in the central hole of the first disc 1341 can be collected and discharged, preventing metal chips from accumulating on the flexible brush 13421.

[0061] In one embodiment, the first auxiliary wheel 134 further includes a fixing sleeve 1344 which is detachably arranged outside the first disc 1341, the cleaning block 1342 and the second disc 1343 to fix the three. The detachable arrangement can facilitate the adjustment of the positions of the three and the cleaning of the cleaning block 1342.

[0062] In one embodiment, the second extension member 14 includes a second plate body 141, the second plate body 141 being rotatably provided with a second guide wheel 142 and a second stabilizing wheel 143, and the second plate body 141 being fixedly provided with a second auxiliary wheel 144 which is close to the workpiece 4; the second auxiliary wheel 144, the second stabilizing wheel 143 and the second guide wheel 142 are sequentially arranged on the same vertical line, and the second auxiliary wheel 144 is close to the workpiece 4.

[0063] The second stabilizing wheel 143 has the same structure as the first stabilizing wheel 133, and the second auxiliary wheel 144 has the same structure as the first auxiliary wheel 134.

[0064] By arranging the first auxiliary wheel 134 and the second auxiliary wheel 144 on both sides of the workpiece 4 respectively, no matter in which direction the electrode wire 12 moves, the first auxiliary wheel 134 or the second auxiliary wheel 144 will be the first to contact after cutting the workpiece 4, so that the metal scraps on the surface of the electrode wire 12 can be effectively removed, preventing the influence of the metal scraps.

[0065] In one specific embodiment, the workbench 2 comprises a first moving table 21 and a second moving table 22 arranged on the first moving table 21. Both of them can move in the horizontal direction.

[0066] The first moving table 21 comprises a first slide 211 and a first adjusting shaft 213. The first slide 211 is fixed on the base 3, and a first table top 212 is arranged on the first slide 211. The first table top 212 can slide on the first slide 211. The first adjusting shaft 213 can adjust the moving distance of the first table top 212 on the first slide 211.

[0067] The second moving table 22 comprises a second slide 221 and a second adjusting shaft 223. The second slide 221 is fixed on the first table top 212, and a second table top 222 is arranged on the second slide 221. The second table top 222 can slide on the second slide 221, and the second adjusting shaft 223 can adjust the moving distance of the second table top 222. The straight line on which the first slide 211 is located is perpendicular to the straight line on which the second slide 221 is located. The workpiece 4 is placed on the second table top 222.

[0068] By arranging the first moving table 21 and the second moving table 22, the moving direction can be adjusted to meet the processing requirements of workpieces 4 of different shapes.

[0069] The above disclosure is only the preferred embodiment of the present application, and of course cannot limit the scope of the rights of the present application. Therefore, the equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A wire saw, characterized in that, The wire drawing assembly (1) comprises a wire storage cylinder (11), an electrode wire (12), a first extension piece (13) and a second extension piece (14), the first extension piece (13) and the second extension piece (14) are arranged in parallel and on the upper and lower sides of the workpiece (4), the electrode wire (12) is partially wound on the wire storage cylinder (11), and the remaining part of the electrode wire (12) can act on the workpiece (4) after being limited by the first extension piece (13) and the second extension piece (14). The first extension piece (13) comprises a stabilizing piece, the stabilizing piece abuts against the electrode wire (12), the stabilizing piece can buffer the electrode wire, and the stabilizing piece can also decelerate the instantaneously accelerated electrode wire (12) to reduce the wire vibration of the electrode wire (12). The first extension piece (13) comprises a first plate body (131), a first stabilizing wheel (133) is rotationally arranged on the first plate body (131), and the stabilizing piece is the first stabilizing wheel (133). An outer peripheral surface of the first stabilizing wheel (133) is provided with a groove (1331), a surface of the groove (1331) is provided with an elastic layer, and the elastic layer can absorb part of the wire vibration of the electrode wire (12). The first stabilizing wheel (133) is internally provided with a moving piece, the moving piece can move in a radial direction, and when the rotating speed of the first stabilizing wheel (133) increases, the moving piece moves away from the center of the first stabilizing wheel (133). The material of the elastic layer is a perfluoroether rubber material or a 60NiTi alloy material.

2. The wire saw as claimed in claim 1, characterized in that The first stabilizing wheel (133) is uniformly provided with a plurality of cavities (1332) in the inside, each cavity (1332) is arranged in a radial direction, a sliding block (1334) is arranged in each cavity (1332), and one end of the sliding block (1334) is fixedly connected to the bottom wall of the cavity (1332) through a spring (1333).

3. The wire saw as claimed in claim 1, characterized in that The moving piece is the sliding block (1334). The first plate body (131) comprises a first auxiliary wheel (134), and the first auxiliary wheel (134) is arranged between the first stabilizing wheel (133) and the workpiece (4).

4. The wire saw of claim 1, wherein, The first auxiliary wheel (134) can assist in reducing the wire vibration of the electrode wire (12). The first auxiliary wheel (134) comprises a first disc (1341), a cleaning block (1342) and a second disc (1343) arranged in a vertical direction in sequence.

5. The wire saw as claimed in claim 4, characterized in that The cleaning block (1342) is provided with a center hole through which the electrode wire (12) passes, and a flexible brush (13421) is arranged on the hole wall of the center hole and abuts against the side wall of the electrode wire (12). The first disc (1341) is also provided with a center hole through which the electrode wire (12) passes.

6. The wire saw as claimed in claim 5, characterized in that ​ Two permanent magnets (13412) are symmetrically arranged in the first disc (1341), and the two permanent magnets (13412) are distributed on both sides of the electrode wire (12) and have a magnetic field therebetween; when the electrode wire (12) vibrates, the magnetic induction lines can be cut, and the generated Ampere force can reduce the wire vibration of the electrode wire (12); The second disc (1343) has the same structure as the first disc (1341), and the magnetic field direction in the second disc (1343) is different from that in the first disc (1341).

7. The wire saw as claimed in claim 6, characterized in that A spiral channel (13411) is arranged in the first disc (1341), and the spiral channel (13411) can discharge metal scraps from the center hole of the first disc (1341).

8. The wire saw as claimed in claim 5, characterized in that The second extension piece (14) comprises a second plate body (141), and the second plate body (141) is provided with a second stabilizing wheel (143) and a second auxiliary wheel (144); the second auxiliary wheel (144) is close to the workpiece (4); The second stabilizing wheel (143) has the same structure as the first stabilizing wheel (133); The second auxiliary wheel (144) has the same structure as the first auxiliary wheel (134).

Images