WO2019056266A1

WO2019056266A1 - Superabrasive coated electrode discharge grinding composite machining device and method

Info

Publication number: WO2019056266A1
Application number: PCT/CN2017/102739
Authority: WO
Inventors: 伍晓宇; 鲁艳军; 周超兰; 徐斌; 赵航; 雷建国
Original assignee: 深圳大学
Priority date: 2017-09-21
Filing date: 2017-09-21
Publication date: 2019-03-28
Also published as: CN109311111B; CN109311111A

Abstract

A superabrasive coated electrode discharge grinding composite machining device (100) is used for machining a workpiece (90). The superabrasive coated electrode discharge grinding composite machining device (100) comprises: a tool electrode (20); a pulse power supply (80), used for providing pulse discharge, connected to the workpiece (90) by using an electric wire and connected to the tool electrode (20) by using an electric wire; a rotary driver (10), used for driving the tool electrode (20) to rotate; and a mobile driver used for driving the rotary driver (10) to move in a space. The tool electrode (20) comprises circular multi-layer sheet electrode plates (21) prepared by using a multi-layer copper foil material. Each electrode plate (21) comprises an electrode plate body (211) and abrasive particles (212) prepared by using a superabrasive and coated, by using an electroplating method, on two sides of the electrode plate body (211). By means of machining carried by the device, multiple side-by-side smooth micro-groove array structures (91) can be efficiently obtained on the surface of the workpiece (90) one time, so as to implement electric spark discharge grinding machining of a hard and brittle material, thereby improving the discharge grinding efficiency and the discharge grinding quality.

Description

Title: A superhard abrasive coating electrode discharge grinding composite processing device and method

[0001] The invention belongs to the field of micro-discharge processing technology equipment, and in particular relates to a super-abrasive coating electrode electrode discharge grinding composite processing device and method.

Background technique

[0002] Three-dimensional microarray structure is fabricated on the surface of hard and brittle materials such as ceramics, glass, sapphire, etc., which can add new engineering application value, but the micro-scale structure of three-dimensional microarray structure is very difficult to process, and there is no high-precision and high-precision Forming processing method.

[0003] Although the conventional micro-discharge machining method can process a microarray structure on a workpiece surface, the conventional micro-discharge machining method cannot guarantee the shape and dimensional accuracy of the three-dimensional microarray structure. Although the high-precision microarray structure can be processed by the conventional grinding wheel and EDM grinding method, the processing efficiency is very low, and it cannot be widely applied and developed in the manufacturing process. Moreover, in the grinding process of the grinding wheel, the grinding wheel needs to be sharpened and trimmed frequently, the processing efficiency is very low, and the grinding wheel dressing precision is difficult to control.

technical problem

[0004] In the prior art, it is not possible to efficiently form a plurality of microarray structures at a time on the surface of a workpiece to be processed and to ensure the processing accuracy of the processed microarray structure.

Problem solution

Technical solution

[0005] The present invention is achieved by a superabrasive coating electrode discharge grinding composite processing apparatus for processing a workpiece, the superabrasive coating electrode discharge grinding composite processing apparatus comprising a tool electrode, Providing a pulse power source electrically connected to the workpiece and electrically connected to the tool electrode, a rotary driver for driving rotation of the tool electrode, and a mobile driver for driving the rotary drive to move in space The tool electrode includes a plurality of electrode sheets for generating an electric spark to machine the workpiece, and a clamping assembly for clamping a plurality of the electrode sheets and connecting with the rotary driver, the clamping assembly being electrically Connecting the pulse power source, the rotary drive is driven by the clamping component The electrode sheet is rotated, and the electrode sheet comprises a plurality of pole piece bodies made of a conductive material and electrically connected to the clamping assembly, and a plurality of pole pieces made of superhard material and protruding from the pole piece body. Abrasive particles on the side surface.

[0006] Further, the pole piece body is annular, and the annular pole piece body includes an inner ring portion provided from the inside to the outside for clamping by the clamping assembly, and is connected to the inner ring portion and An outer ring portion that generates an electric spark between the workpiece, and a plurality of the abrasive grains are protruded from the annular surface on both sides of the outer ring portion.

Further, a plurality of the abrasive grains are uniformly distributed annularly on the toroidal surfaces on both sides of the outer ring portion, and the distance from the grinding point of the abrasive grains to the toroidal surface of the outer ring portion is equal.

Further, the tool electrode further includes a spacer made of a conductive material and disposed between adjacent pole piece bodies.

[0009] Further, the spacer is circular and located between the adjacent inner ring portions of the two adjacent pole piece bodies and electrically connects the two adjacent pole piece bodies.

[0010] Further, the diameter of the spacer is smaller than the diameter of the pole piece body.

[0011] Further, the number of the pole piece bodies is three, and the inner ring portions of the three pole piece bodies and the spacers disposed between the adjacent inner ring portions form a pole piece together The conductive portion; the outer ring portion of the three pole piece bodies and the abrasive grains uniformly disposed on the ring faces on both sides of the outer ring portion together form a discharge grinding portion.

[0012] Further, the clamping assembly includes a grinding wheel clamp electrically clamped on both sides of the pole piece conductive portion and a flange clamp clamped on both sides of the grinding wheel clamp.

[0013] Further, the grinding wheel clamp includes a first grinding wheel electrically clamped to the inner ring portion on one side of the pole piece conductive portion, and is disposed opposite to the first grinding wheel and electrically clamped thereto a second grinding wheel of the inner ring portion on the other side of the pole piece conductive portion.

[0014] Further, the diameter of the first grinding wheel is smaller than the diameter of the pole piece body, and the diameter of the second grinding wheel is smaller than the diameter of the pole piece body.

[0015] Further, the flange clamp includes a fastening flange clamped to one side of the first grinding wheel and a positioning disposed opposite to the fastening flange and clamped to a side of the second grinding wheel Flange.

[0016] Further, the positioning flange is rotatably connected to the rotary drive; the fastening flange, the first grinding wheel, the pole piece conductive portion, the second grinding wheel and the positioning flange Set them side by side. [0017] Further, the superabrasive coating electrode electrode electric discharge machining device further includes a brush, one end of the brush is electrically connected to the pulse power source, and the other end of the brush is in sliding contact and electrically connected to The first grinding wheel faces the surface of the fastening flange.

[0018] Further, the workpiece, the pulse power source, the brush and the tool electrode are electrically connected in sequence, and the workpiece and the tool electrode are disposed at a predetermined distance to generate an EDM workpiece. .

[0019] Further, the pulse power supply has a pulse voltage range of 20 to 150V, and a pulse frequency range of 100 to 50.

00 Hz, pulse width range is 0.2~100 s.

[0020] Further, a superabrasive coating electrode discharge grinding composite processing method for processing a workpiece includes the following processing steps:

[0021] preparation step: preparing the superabrasive coating electrode discharge grinding composite processing device;

[0022] a workpiece presetting step: placing the workpiece in a suitable position to cooperate with the superabrasive coating electrode discharge grinding composite processing device;

[0023] processing step: the rotary drive drives the tool electrode to rotate at a high speed, the mobile drive drives the rotary drive to move in space, and a discharge circuit is formed between the workpiece, the tool electrode and the pulse power source, A fine electric spark discharge is generated between the electrode sheet and the workpiece to erode the workpiece, and the abrasive grain cuts the workpiece.

Advantageous effects of the invention

Beneficial effect

[0024] The superabrasive coating electrode electrode electric discharge grinding and processing device provided by the present invention uses a high-efficiency micro spark discharge machining method to make a plurality of laminar electrode sheets and workpieces by using a plurality of high-speed rotating sheet electrode sheets. A fine electric spark is generated to electrically discharge the workpiece. Driven by the mobile drive and the rotary drive, the electrode pads of the tool electrode can be discharged through a fine electric spark in the depth feed direction of the workpiece.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a superabrasive coating electrode electrode electric discharge machining device according to an embodiment of the present invention.

2 is a schematic structural view of a tool electrode of the superabrasive coating electrode electrode electric discharge grinding combined processing apparatus of FIG. 3 is a partial enlarged view of A of FIG. 1.

4 is a schematic structural view of an electrode sheet of the superabrasive plating electrode discharge grinding composite processing apparatus of FIG. 1.

5 is a schematic view showing the structure of a discharge grinding portion and a pole piece conductive portion of the superabrasive plating electrode discharge grinding combined processing apparatus of FIG. 1.

Embodiments of the invention

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

[0031] In the description of the present invention, it is to be understood that the orientation or positional relationship of the terms "thickness", "upper", "lower", "vertical", "parallel", "bottom", "corner", etc. The orientation or the positional relationship based on the drawings is merely for the convenience of the description of the present invention and the description thereof, and is not intended to indicate or imply that the device or component referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot Understood as a limitation of the present invention

[0032] In the present invention, the terms "installation", "connection" and the like should be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise specifically defined and defined; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements.

[0033] Referring to FIG. 1 to FIG. 2, the superabrasive coating electrode electrode electric discharge machining device 10 for machining the workpiece 90 includes: a tool electrode 20 for supplying pulse electric energy and a pulse power source 80 electrically connected to the workpiece 90 and electrically connected to the tool electrode 20, a rotary driver 10 for driving the rotation of the tool electrode 20, and a mobile driver for driving the rotary drive 10 to move in space ( Not shown in the picture). In this embodiment, the mobile drive is a numerically controlled grinding machine (not shown) having a three-axis linkage system, and the rotary drive 10 is one end of the rotary shaft 10 of the numerically controlled grinding machine, and the other end of the rotary shaft 10 Connected to the tool electrode 20. The tool electrode 20 includes a plurality of electrode sheets 21 for generating an electric spark to machine the workpiece 90 and for clamping a plurality of the electrode sheets 21 and with the rotating shaft 1 The clamping assembly 30 is electrically connected to the pulse power source 80. The rotating shaft 10 drives the electrode sheet 21 to rotate by the clamping assembly 30. The electrode sheet 21 includes several A pole piece body 211 made of a conductive material and electrically connected to the clamping assembly ₃₀ , and a plurality of abrasive particles 212 made of a super-hard material and protruding from both sides of the pole piece body 211.

[0034] Specifically, the material of the workpiece 90 may be a conductive material (for example: steel, cemented carbide, etc.), or a non-conductive material (for example, glass, sapphire, etc.), when the workpiece 90 is a non-conductive material, The workpiece 90 is subjected to induced discharge. Preferably, the material of the workpiece 90 in this embodiment is a conductive material. The pulse power supply 80 has a pulse voltage range of 20 to 150 V, a pulse frequency range of 100 to 5000 Hz, and a pulse width ranging from 0.2 to 100 μ ₈ . Preferably, in the present embodiment, the pulse power supply 80 has a pulse voltage of 50 V, a pulse frequency of 2000 Hz, and a pulse width of 50 s.

[0035] According to the superabrasive coating electrode discharge grinding composite processing apparatus 100, an embodiment of the present invention further provides a discharge grinding method for processing a workpiece 90, including the following processing steps:

[0036] Preparation steps: preparing the superabrasive coating electrode discharge grinding composite processing device 100;

[0037] a workpiece presetting step: placing the workpiece 90 in a suitable position to cooperate with the superabrasive coating electrode discharge grinding composite processing device 100 for electrical discharge machining;

[0038] processing step: the rotating shaft 10 drives the tool electrode 20 to rotate at a high speed, the moving drive drives the rotating shaft 10 to move in space, the workpiece 90, the tool electrode 20 and the pulse power source 80 A discharge circuit is formed between the electrode sheets 21 and the workpiece 90 to generate a fine electric spark discharge to erode the workpiece 90, and the abrasive particles 212 cut the workpiece 90. The workpiece 90 is etched by the fine electric discharge machining in the depth feed direction a by the electrode sheet 21, and the abrasive particles 212 micro-cut the workpiece 90 on both sides of the electrode sheet 21 rotating at a high speed, so that the surface of the workpiece 90 can be high. Efficiency, a plurality of smooth micro-groove array structures are processed side by side, thereby achieving electrical discharge spark-grinding composite processing of conductive hard and brittle materials, which can greatly improve discharge grinding efficiency and discharge grinding quality.

[0039] The superabrasive coating electrode discharge grinding combined processing apparatus 100 provided by the embodiment of the present invention, by mounting the rotating shaft 10 on a numerically controlled grinding machine, and using a high-efficiency micro-discharge electric discharge machining method to make a plurality of thin sheets The electrode sheet 21 is rotated at a high speed, and preferably, the rotational speed N of the rotary shaft 10 is 1000 to 5000 rpm. The plurality of sheet electrode sheets 21 are caused to generate a fine electric spark between the circumferential side surface of the workpiece 90 and the workpiece 90, thereby performing electric discharge machining on the workpiece 90. Driven by the three-axis linkage system of the CNC grinding machine, electricity The pole piece 21 can remove the material of the workpiece 90 by the fine electric discharge machining in the depth feed direction a of the workpiece 90, the feed speed is in the range of 10 to 200 mm/min, and the feed depth is in the range of 10 to 100 μm. Preferably, in this embodiment, the rotational speed Ν of the electrode sheet 21 is 1000 rpm, the feed depth is 50 μm, and the feed speed a is 20 mm/min.

[0040] A plurality of abrasive grains 212 projecting on both side surfaces of the electrode sheet 21 micro-cut the workpiece 90 to further process the workpiece 90. Thus, by the composite processing of discharge and grinding, a plurality of microarray structures (not shown) can be efficiently and accurately processed on the surface of the workpiece 90. The microarray structure may be a micro-trench array structure 91. The groove cross-sectional shape of the micro-trench array structure 91 may be rectangular, trapezoidal or V-shaped, wherein the width of the groove ranges from 10 to 800 μm, adjacent trenches. The spacing between the grooves ranges from 20 to 500 μm, and the groove depth of the grooves ranges from 10 to 100 μm. The surface roughness R _α of the processed micro-groove array structure 91 ranges from 0.01 to 0.5 μm. Preferably, the micro-trench array structure 91 processed in this embodiment is a trapezoidal trench, the trapezoidal trench width is 535 μm, and the spacing between the adjacent trapezoidal trenches is 125 μm, the trapezoidal trench The depth is 45μηι.

[0041] Further, the pole piece body 211 is annular, and the pole piece body 211 includes an inner ring portion 2111 disposed from the inside to the outside for clamping by the clamping assembly 30, and is connected to the inner ring portion. An outer ring portion 2112 that generates an electric spark between the workpiece and the workpiece 90, and a plurality of the abrasive grains 212 are disposed on the annular surfaces on both sides of the outer ring portion 2112. The inner ring portion 2111 is sleeved on the rotating shaft 10 and rotates at a high speed with the rotating shaft 10. In the present embodiment, the pole piece body 211 is a conventional thin pole piece made of copper foil, and has a thickness ranging from 5 to 800 μm.

[0042] Further, the abrasive particles 212 are in contact with the workpiece 90 and the grinding points of the workpiece 90 are ground to the annulus of the outer ring portion 2112 at equal distances, and the plurality of abrasive grains 212 are ring-shaped. And equal heights are evenly distributed on the annular faces on both sides of the outer ring portion 2112.

[0043] Specifically, the abrasive particles 212 are plated on the annular surface of the outer ring portion 2112 by an electroplating process, and the material of the abrasive particles 212 may be a super hard abrasive such as diamond or cubic boron nitride, and the abrasive particles 212 The particle size ranges from 1000 to 5 000 mesh, and the abrasive particles 212 are disposed at a position ranging from the position of the outer ring portion 2112 to the circumference of the pole piece body 211 by a range of 0 to 10 mm. Preferably, in the present embodiment, the abrasive particles 212 are diamond abrasives having a particle size of 3000 mesh, and the minimum distance of the abrasive particles 212 to the circumference of the pole piece body 211 is 6 mm. The abrasive particles 212 are outwardly convexly disposed to grind the workpiece 90, thereby further enhancing the surface of the microgrooved array structure 91. Precision.

Referring to FIG. 3 to FIG. 4, further, the tool electrode 20 further includes a spacer 22 made of a conductive material and disposed between the adjacent pole piece bodies 211. The spacer 22 is annular and is located between the inner ring portions 2111 of the two adjacent pole piece bodies 211. The spacer 22 has a diameter smaller than the diameter of the pole piece body 211. Specifically, the spacer 22 is sleeved on the rotating shaft 10 and electrically connected to the adjacent pole body 211. The thickness of the spacer 22 ranges from 20 to 500 μm. The diameter of the pole piece body 211 is 0.5 to 5 mm larger than the diameter of the spacer 22. Preferably, the diameter of the pole piece body 211 in this embodiment is larger than the diameter of the spacer 22 by 1 mm.

Referring to FIG. 5, further, the number of the pole piece bodies 211 is three. In other embodiments, the number of the pole piece bodies 211 can be set according to actual needs. In the present embodiment, the thickness of each of the three pole piece main bodies 211 is preferably 500 μm. The inner ring portion 2111 of the three pole piece bodies 211 and the spacer 22 disposed between the adjacent inner ring portions 2111 together form a pole piece conductive portion 70; three of the pole piece bodies 2 11 The outer ring portion 2112 and the abrasive grains 212 uniformly disposed on the annular surfaces of the outer ring portions 2112 together form the electric discharge grinding portion 60. By electrically connecting the pole piece conductive portion 70, an electric spark can be generated between the discharge grinding portion 60 and the workpiece 90, and three micro groove array structures 91 can be processed in parallel at a time, which greatly improves processing efficiency. .

[0046] Further, any adjacent electrode sheets 21 and the spacers 22 located between the adjacent electrode sheets 21 are collectively formed to form an annular grinding groove 50, and the grinding groove 50 is The groove width is equal to the thickness of the spacer 22. In the present embodiment, the groove width of the grinding groove 50 ranges from 20 to 500 μm, and the number is two. The debris of the tool electrode 20 during the grinding process can be discharged through the two grinding grooves 50.

[0047] Further, the clamping assembly 30 includes a grinding wheel clamp electrically clamped on both sides of the pole piece conductive portion 70.

32 and a flange clamp 31 clamped to both sides of the grinding wheel clamp 32. The grinding wheel holder 32 clamps a plurality of the electrode sheets 21 and the spacers 22 from the both sides of the pole piece conductive portion 70 therebetween, so that a good electrical connection is maintained between the spacers 22 and the electrode sheets 21.

[0048] Further, the grinding wheel clamp 32 includes a first grinding wheel 321 electrically clamped to the inner ring portion 2111 on the side of the pole piece conductive portion 70, and is disposed opposite to the first grinding wheel 321 and electrically The second grinding wheel 322 of the inner ring portion 2111 is clamped to the other side of the pole piece conductive portion 70. Both the first grinding wheel 321 and the second grinding wheel 322 have good electrical conductivity, and can electrically connect the pole piece conductive portion 70 well. First sand The wheel 321 and the second grinding wheel 322 are respectively sleeved on the rotating shaft 10 and pressed against the pole piece conductive portion 70 to fix the pole piece conductive portion 70 to the rotating shaft 10.

[0049] Further, the diameter of the first grinding wheel 321 is smaller than the diameter of the pole piece body 211, and the diameter of the second grinding wheel 322 is smaller than the diameter of the pole piece body 211, so that the tool electrode 20 can be removed from the discharge mill The workpiece 90 is ground on both sides of the cut portion 60. The diameter of the pole piece body 211 is larger than the diameter of the first grinding wheel 321 and the second grinding wheel 322 by 0.5 to 5 mm. In the present embodiment, the diameters of the first grinding wheel 321, the second grinding wheel 322, and the spacer 22 are equal. The diameter of the pole piece main body 211 is larger than the diameter of the first grinding wheel 321 by 1 mm, and is also larger than the diameter of the second grinding wheel 322 by 1 mm.

[0050] The flange clamp 31 includes a fastening flange 311 clamped to the side of the first grinding wheel 321 and is disposed opposite to the fastening flange 311 and clamped to the second grinding wheel 322. Positioning flange 312. The fastening flange 311 and the positioning flange 312 respectively clamp the first grinding wheel 321 and the second grinding wheel 322.

[0051] Further, the fastening flange 311 and the positioning flange 312 are sleeved and fixed on the rotating shaft 10. The fastening flange 311, the first grinding wheel 321, the pole piece conductive portion 70, the second grinding wheel 322 and the positioning flange 312 are arranged in parallel and are driven by the rotating shaft 10 Rotating about a central axis of the rotating shaft 10.

[0052] Further, the superabrasive coating electrode discharge grinding composite processing apparatus 100 further includes a brush 40.

In the embodiment, the brush 40 is a graphite brush. The brush 40 is electrically connected to the pulse power source 80. The other end of the brush 40 is in sliding contact and electrically connected to the first grinding wheel 321 toward the surface of the fastening flange 311. The first grinding wheel 321 rotates about the central axis of the rotating shaft 10, and the brush 40 slides on the surface of the first grinding wheel 321 and is electrically connected with the first grinding wheel 321 so that the electric discharge grinding portion 60 can continue to An electric spark is generated between the workpieces 90.

[0053] Further, the workpiece 90, the pulse power source 80, the graphite brush 40, and the tool electrode 20 are electrically connected in sequence, and the workpiece 90 and the tool electrode 20 are disposed at an appropriate distance so as to be The resulting spark meets the processing requirements of the workpiece 90.

[0054] The working process of the superabrasive coating electrode discharge grinding composite processing device provided by the embodiment of the present invention will be described below with reference to the specific structure and the accompanying drawings of the embodiment:

[0055] The fastening flange 321 is disposed opposite to the positioning flange 312 and sleeved and fixed to one end of the rotating shaft 10, and the other end of the rotating shaft 10 is transferred to the numerical control grinding machine, and the three-axis linkage system of the numerical control grinding machine makes the rotating shaft 10 in rotation The rotating peers can also run in a predetermined trajectory in space.

[0056] Three sheet electrode sheets 21 are mounted between the first grinding wheel 321 and the second grinding wheel 322 of the grinding wheel holder 32, three electrode sheets 21 are spaced apart, and a gasket 22 is disposed between the adjacent electrode sheets 21. Then, the grinding wheel holder 32 is sleeved with the electrode sheet 21 and the spacer 22 at one end of the rotating shaft 10 and fixed between the fastening flange 321 and the positioning flange 312.

[0057] The fastening flange 321 axially presses the first grinding wheel 321 and the second grinding wheel 322 toward the positioning flange 322, thereby achieving the purpose of fixing the three electrode sheets 21.

[0058] The graphite brush 40 is electrically connected to one pole of the pulse power source 80, and the other end is slid and electrically connected to the first grinding wheel. The conductive workpiece 90 is electrically connected to the other pole of the pulse power source 80.

[0059] The three electrode sheets 21 rotate with the rotating shaft 10 at a high speed, and driven by the three-axis numerical control linkage system of the numerical control grinding machine, the three electrode sheets 21 move along the set numerical control machining walking track, and the high-speed rotating electrode sheets A fine electric spark discharge is generated between the workpiece 21 and the workpiece 90, and the surface material of the workpiece 90 is removed by micro-discharge machining along the depth feed direction a. The outer ring portion 2112 of the electrode sheet 21 is further micro-cutted by the superabrasive particle 212 to remove the workpiece. The material of 90, thereby forming a plurality of smooth micro-groove array structures 91 at a time on the surface of the workpiece 90 and side by side.

The superabrasive coating electrode discharge grinding composite processing device 100 provided by the embodiments of the present invention has a wide adaptability, and a plurality of three-dimensional microarray structures 91 can be processed on the surface of any workpiece 90. The electrode sheet 21 has less loss, and the electrode sheet 21 does not need to be frequently replaced, and the electrode sheet 21 that rotates at a high speed can self-repair its shape and roundness, and the pole piece body 211 plated with the abrasive grains 212 is also easily replaced. The processing efficiency and the processing precision are high, and a plurality of micro-groove array structures 91 can be formed side by side to greatly improve the processing efficiency, and the grinding action of the abrasive grains 212 on the electrode sheet 21 can ensure the processed micro-groove array structure. 91 has high machining accuracy.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the present invention. Within the scope of protection of the invention.

Claims

Claim

[Claim 1] A superabrasive coating electrode electrode electric discharge machining device for processing a workpiece

The superabrasive plating electrode discharge grinding combined processing apparatus includes a tool electrode, a pulse power source for providing a pulse discharge and connected to the workpiece wire and connected to the tool electrode wire, and is used for a driving station. a rotary drive for rotating a tool electrode and a mobile drive for driving the rotary drive to move in a space, the tool electrode comprising a plurality of electrode sheets for generating an electric spark to machine the workpiece and for clamping a plurality of a clamping piece connected to the rotary driver, the clamping assembly wire is connected to the pulse power source, and the rotary driver drives the electrode piece to rotate by the clamping assembly, the electrode piece comprises A plurality of pole piece bodies made of a conductive material and electrically connected to the clamping assembly and a plurality of abrasive grains made of superhard material and protruding from both side surfaces of the pole piece body.

[Claim 2] The superabrasive plating electrode electrode electric discharge machining device according to claim 1, wherein: the pole piece body is annular, and the pole piece body includes a supply chamber disposed from the inside to the outside. An inner ring portion clamped by the clamping assembly, and an outer ring portion connected to the inner ring portion and generating an electric spark between the workpiece, and a plurality of the abrasive grains are disposed on the ring on both sides of the outer ring portion surface.

[Claim 3] The superabrasive coating electrode electrode electric discharge machining apparatus according to claim 2, wherein: the plurality of abrasive grains are annularly distributed uniformly on the toroids on both sides of the outer ring portion and The distance from the grinding point of the abrasive particles to the annulus of the outer ring portion is equal.

[Claim 4] The superabrasive plating electrode discharge grinding combined processing apparatus according to claim 2, wherein: the tool electrode further comprises: the pole piece body made of a conductive material and disposed adjacent to The gasket between.

[Claim 5] The superabrasive coating electrode electrode electric discharge machining apparatus according to claim 3, wherein: the spacer is circular and located in the two adjacent pole piece bodies Two adjacent pole piece bodies are connected between the ring portions and the wires.

[Claim 6] The superabrasive plating electrode discharge grinding combined machining apparatus according to claim 5, wherein the spacer has a diameter smaller than a diameter of the pole piece body. The superabrasive plating electrode discharge grinding combined processing apparatus according to claim 5, wherein: the number of the pole piece bodies is three, and the inner ring portions of the three pole piece bodies are disposed at The spacers between the adjacent inner ring portions collectively form a pole piece conductive portion; the outer ring portions of the three pole piece bodies and the grinding evenly disposed on both sides of the outer ring portion The pellets together form a discharge grinding section.

The superabrasive coating electrode electrode electric discharge machining device according to claim 7, wherein: the clamping assembly comprises a grinding wheel clamp electrically clamped on both sides of the pole piece conductive portion and clamped in the same The flange clamps on both sides of the grinding wheel fixture.

The superabrasive coating electrode electrode electric discharge machining apparatus according to claim 8, wherein: the grinding wheel jig includes a first portion of the inner ring portion electrically clamped to one side of the pole piece conductive portion. a grinding wheel and a second grinding wheel disposed opposite to the first grinding wheel and electrically clamped to the inner ring portion on the other side of the pole piece conductive portion.

The superabrasive coating electrode electrode electric discharge machining device according to claim 9, wherein: the diameter of the first grinding wheel is smaller than the diameter of the pole piece body, and the diameter of the second grinding wheel is smaller than the pole The diameter of the sheet body.

The superabrasive plating electrode discharge grinding combined machining apparatus according to claim 9, wherein: said flange clamp comprises a fastening flange clamped to one side of said first grinding wheel and said fastening The flange is oppositely disposed and clamped to the positioning flange on one side of the second grinding wheel. The apparatus of claim 11 , wherein: the positioning flange is rotatably coupled to the rotary drive; the fastening flange, the first grinding wheel, the The pole piece conductive portion, the second grinding wheel and the positioning flange are arranged in parallel.

The superabrasive coating electrode electrode electric discharge machining device according to claim 11, wherein: the superabrasive coating electrode electrode electric discharge machining device further comprises a brush, and one end of the electric wire is connected to the electric wire. a pulse power source, the other end of the brush is in sliding contact and the wire is connected to the surface of the first grinding wheel facing the fastening flange.

The superabrasive plating electrode discharge grinding combined processing apparatus according to claim 13, wherein: the workpiece, the pulse power source, the brush, and the tool electrode are Secondary wires are connected and the workpiece is placed at a predetermined distance from the tool electrode to produce EDM machining of the workpiece.

[Claim 15] The superabrasive plating electrode discharge grinding combined processing apparatus according to any one of claims 1 to 14, wherein: the pulse power source has a pulse voltage range of 20 to 150 V, and a pulse frequency range For 100~5000 Hz, the pulse width ranges from 0.2 to 100 s.

[Claim 16] A superabrasive coating electrode electrode electric discharge machining method for processing a workpiece, characterized by comprising the following processing steps:

Preparation step: preparing a superabrasive coating electrode discharge grinding composite processing apparatus according to any one of claims 1 to 15;

Workpiece presetting step: placing the workpiece in a suitable position to cooperate with the superabrasive plating electrode discharge grinding composite processing device;

Processing step: the rotary drive drives the tool electrode to rotate at a high speed, the mobile drive drives the rotary drive to move in space, and a discharge circuit is formed between the workpiece, the tool electrode and the pulse power source, the electrode A fine electric spark discharge is generated between the sheet and the workpiece to erode the workpiece, and the abrasive particles cut the workpiece.