CN109311111B - Discharge grinding combined machining device and method for superhard abrasive coating electrode - Google Patents

Abstract

A combined machining device (100) for discharge grinding of a superhard abrasive coating electrode is used for machining a workpiece (90), and comprises a tool electrode (20), a pulse power supply (80) which is used for providing pulse discharge, is connected with the workpiece (90) through a wire and is connected with the tool electrode (20) through a wire, a rotary driver (10) (a rotating shaft 10) which is used for driving the tool electrode (20) to rotate and a movable driver which is used for driving the rotary driver (10) to move in space, wherein the tool electrode (20) comprises a circular multilayer sheet electrode slice (21) which is made of multilayer copper foil materials and is used for the combined machining device for discharge grinding of the superhard abrasive coating electrode, the electrode slice (21) comprises a pole piece body (211) and abrasive grains which are made of superhard abrasive and coated on two sides of the pole piece body (211) through an electroplating method, and manufacturing the super-hard abrasive coating thin electrode slice (21). The rotary abrasive coating sheet electrode slice (21), a grinding wheel clamp (31) and a flange clamp (32) are installed on a rotating shaft (10) of a numerical control grinding machine together, the diameter of the rotary abrasive coating sheet electrode slice (21) is 0.5-5 mm larger than that of the grinding wheel clamp (31), and the rotary abrasive coating sheet electrode slice and the flange clamp rotate together with the grinding wheel clamp (31), two ends of the grinding wheel clamp (31) and a conductive workpiece (90) are connected with a pulse power supply (80) through a graphite brush (40), the conductive workpiece (90) is placed on a horizontal workbench, so that pulse electric spark discharge is generated between the rotary abrasive coating electrode slice (21) and the workpiece (90), the rotary coating electrode slice (21) reciprocates on the surface of the workpiece (90) along a set numerical control track, the material of the workpiece (90) is removed through micro-discharge machining along the feeding depth direction, and the material of the workpiece (90) is removed through micro-cutting through superhard abrasive grains (212) along the two side directions of, therefore, a plurality of smooth micro-groove array structures (91) can be machined on the surface of the workpiece (90) side by side at one time with high efficiency, so that the electric spark discharge grinding machining of hard and brittle materials is realized, and the discharge grinding efficiency and the discharge grinding quality can be greatly improved.

Description

Discharge grinding combined machining device and method for superhard abrasive coating electrode

Technical Field

The invention belongs to the technical field of micro-discharge machining, and particularly relates to a discharge grinding combined machining device and method for a superhard abrasive coating electrode.

Background

A three-dimensional microarray structure is processed on the surface of hard and brittle materials such as ceramics, glass, sapphire and the like, and a new engineering application value can be added, but the processing of the three-dimensional microarray structure with a micron-scale structure is very difficult, and a high-efficiency and high-precision forming processing method does not exist at present.

Although the traditional micro-discharge machining method can machine the micro-array structure on the surface of the workpiece, the traditional micro-discharge machining method cannot ensure the shape and the size precision of the three-dimensional micro-array structure. Although the microarray structure with high precision can be processed by using the traditional grinding wheel grinding and electric spark discharge grinding methods, the processing efficiency is very low, and the microarray structure cannot be widely applied and developed in the production and manufacturing process. In addition, in the grinding process of the grinding wheel, the grinding wheel needs to be sharpened and dressed frequently, the processing efficiency is very low, and the dressing precision of the grinding wheel is difficult to control.

Disclosure of Invention

The invention aims to provide a discharge grinding combined machining device for a superhard abrasive coating electrode, and aims to solve the problems that a plurality of microarray structures cannot be formed and machined on the surface of a machined workpiece at one time in a high-efficiency mode and the machining precision of the machined microarray structures cannot be guaranteed in the prior art.

The discharge grinding composite processing device comprises a tool electrode, a pulse power supply, a rotary driver and a movable driver, wherein the pulse power supply is used for providing pulse power, is electrically connected with the workpiece and is electrically connected with the tool electrode, the rotary driver is used for driving the tool electrode to rotate, the movable driver is used for driving the rotary driver to move in a space, the tool electrode comprises a plurality of electrode plates and a clamping assembly, the electrode plates are used for generating electric sparks to process the workpiece, the clamping assembly is used for clamping the electrode plates and is connected with the rotary driver, the clamping assembly is electrically connected with the pulse power supply, the rotary driver drives the electrode plates to rotate through the clamping assembly, the electrode plates comprise a plurality of electrode plate bodies made of conductive materials and electrically connected with the clamping assembly, and a plurality of electrode plate bodies made of superhard materials And the abrasive particles are manufactured and convexly arranged on the surfaces of the two sides of the pole piece body.

Furthermore, the pole piece body is annular, the annular pole piece body comprises an inner annular portion and an outer annular portion, the inner annular portion is arranged from inside to outside and used for clamping the clamping assembly, the outer annular portion is connected to the inner annular portion and used for generating electric sparks between the workpiece, and the abrasive particles are convexly arranged on annular surfaces on two sides of the outer annular portion.

Furthermore, a plurality of abrasive particles are uniformly distributed on the ring surface of the two sides of the outer ring part in an annular shape, and the distances from the grinding points of the abrasive particles to the ring surface of the outer ring part are equal.

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

Furthermore, the gasket is circular and is located between the inner ring portions of two adjacent pole piece bodies and is electrically communicated with the two adjacent pole piece bodies.

Further, the diameter of the gasket is smaller than the diameter of the pole piece body.

Further, the number of the pole piece bodies is three, and the inner ring portions of the three pole piece bodies and the gaskets arranged between the adjacent inner ring portions form a pole piece conductive portion together; the outer ring parts of the three pole piece bodies and the abrasive particles uniformly arranged on the ring surfaces of the two sides of the outer ring parts form discharge grinding parts together.

Furthermore, the clamping assembly comprises a grinding wheel clamp and flange clamps, wherein the grinding wheel clamp is electrically clamped on two sides of the conductive part of the pole piece, and the flange clamps are clamped on two sides of the grinding wheel clamp.

Further, the grinding wheel clamp comprises a first grinding wheel electrically clamped on the inner ring portion on one side of the pole piece conductive portion and a second grinding wheel arranged opposite to the first grinding wheel and electrically clamped on the inner ring portion on the other side of the pole piece conductive portion.

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

Furthermore, the flange clamp comprises a fastening flange clamped on one side of the first grinding wheel and a positioning flange arranged opposite to the fastening flange and clamped on one side of the second grinding wheel.

Further, the positioning flange is rotatably connected to the rotary driver; the fastening flange, the first grinding wheel, the pole piece conductive part, the second grinding wheel and the positioning flange are sequentially arranged in parallel.

Further, the combined discharge grinding and machining device for the superhard abrasive coating electrode further comprises an electric brush, one end of the electric brush is electrically connected with the pulse power supply, and the other end of the electric brush is in sliding contact with and electrically connected to the surface, facing the fastening flange, of the first grinding wheel.

Further, the workpiece, the pulse power supply, 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 electric discharge machining of the workpiece.

Furthermore, the pulse voltage range of the pulse power supply is 20-150V, the pulse frequency range is 100-5000 Hz, and the pulse width range is 0.2-100 mus.

Further, the discharge grinding combined machining method of the superhard abrasive coating electrode is used for machining a workpiece and comprises the following machining steps:

the preparation method comprises the following steps: preparing the superhard abrasive material coating electrode discharge grinding combined machining device;

workpiece presetting: placing the workpiece in a proper position to cooperate with the superhard abrasive material coating electrode discharge grinding combined machining device;

the processing steps are as follows: the rotary driver drives the tool electrode to rotate at a high speed, the movable driver drives the rotary driver to move in space, a discharge loop is formed among the workpiece, the tool electrode and the pulse power supply, micro electric spark discharge is generated between the electrode slice and the workpiece to erode the workpiece, and the abrasive particles cut the workpiece.

The invention has the technical effects that: the superhard abrasive coating electrode discharge grinding combined machining device provided by the invention utilizes a high-efficiency micro electric spark discharge machining method, and generates micro electric sparks between a plurality of sheet electrode slices and a workpiece by using a plurality of sheet electrode slices rotating at a high speed, so as to perform electric discharge machining on the workpiece. Under the drive of the moving driver and the rotating driver, the electrode sheet of the tool electrode can discharge through the micro electric spark in the depth feeding direction of the workpiece.

Drawings

Fig. 1 is a schematic structural diagram of a combined machining apparatus for discharge grinding of a superabrasive-coated electrode according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the construction of a tool electrode of the superabrasive coated electrode electric discharge grinding composite machining apparatus of fig. 1.

Fig. 3 is a partially enlarged view of a portion a of fig. 1.

Fig. 4 is a schematic structural view of an electrode sheet of the superabrasive-coated electrode discharge grinding composite machining apparatus of fig. 1.

Fig. 5 is a schematic structural view of an electric discharge grinding part and a pole piece electric conduction part of the combined electric discharge grinding and grinding device for the superabrasive coated electrode of fig. 1.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "vertical", "parallel", "bottom", "angle", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship.

Referring to fig. 1 to 2, the combined machining apparatus 100 for electric discharge grinding of superabrasive-coated electrodes according to the present invention is used for machining a workpiece 90, and includes: a tool electrode 20, a pulse power source 80 for providing pulse power, electrically connected to the workpiece 90 and electrically connected to the tool electrode 20, a rotary driver 10 for driving the tool electrode 20 to rotate, and a movement driver (not shown) for driving the rotary driver 10 to move in space. In this embodiment, the moving driver is a numerically controlled grinder (not shown) having a three-axis linkage system, the rotating driver 10 is a rotating shaft 10 having one end connected to the numerically controlled grinder, and the other end of the rotating shaft 10 is connected to the tool electrode 20. The tool electrode 20 includes a plurality of electrode plates 21 for generating an electric spark to machine the workpiece 90 and a clamping assembly 30 for clamping the plurality of electrode plates 21 and connecting with the rotating shaft 10, the clamping assembly 30 is electrically connected with the pulse power source 80, the rotating shaft 10 drives the electrode plates 21 to rotate through the clamping assembly 30, and the electrode plates 21 include a plurality of electrode plate bodies 211 made of a conductive material and electrically connected with the clamping assembly 30 and a plurality of abrasive grains 212 made of a superhard material and convexly disposed on two side surfaces of the electrode plate bodies 211.

Specifically, the material of the workpiece 90 may be a conductive material (e.g., steel, cemented carbide, etc.) or a non-conductive material (e.g., glass, sapphire, etc.), and when the workpiece 90 is a non-conductive material, the workpiece 90 needs to be induced to discharge. Preferably, the material of the workpiece 90 in this embodiment is a conductive material. The pulse voltage range of the pulse power supply 80 is 20-150V, the pulse frequency range is 100-5000 Hz, and the pulse width range is 0.2-100 mus. Preferably, the pulse voltage of the pulse power supply 80 in this embodiment is 50V, the pulse frequency is 2000Hz, and the pulse width is 50 μ s.

According to the combined machining device 100 for discharge grinding of the superhard abrasive coating electrode, the embodiment of the invention also provides a discharge grinding method for machining the workpiece 90, which comprises the following machining steps:

the preparation method comprises the following steps: preparing the combined machining device 100 for discharge grinding of the superhard abrasive coating electrode;

workpiece presetting: placing the workpiece 90 in a position to cooperate with the superabrasive coated electrode discharge grinding composite machining apparatus 100 for discharge machining;

the processing steps are as follows: the rotating shaft 10 drives the tool electrode 20 to rotate at a high speed, the moving driver drives the rotating shaft 10 to move in space, a discharge circuit is formed among the workpiece 90, the tool electrode 20 and the pulse power supply 80, a fine spark discharge is generated between the electrode sheet 21 and the workpiece 90 to erode the workpiece 90, and the abrasive particles 212 cut the workpiece 90. The electrode plate 21 erodes the workpiece 90 through micro electric discharge machining in the depth feeding direction a, and the abrasive particles 212 perform micro cutting machining on two sides of the electrode plate 21 rotating at a high speed, so that a plurality of smooth micro groove array structures can be machined on the surface of the workpiece 90 at high efficiency in one time side by side, the electric discharge grinding composite machining of the conductive hard and brittle material is realized, and the electric discharge grinding efficiency and the electric discharge grinding quality can be greatly improved.

In the combined discharge grinding and machining apparatus 100 for superabrasive coated electrode provided in the embodiment of the present invention, the rotating shaft 10 is mounted on a numerically controlled grinder, and the plurality of sheet electrode pieces 21 are rotated at a high speed by a high-efficiency fine electric discharge machining method, and preferably, the rotating speed N of the rotating shaft 10 is 1000 to 5000 rpm. The plurality of thin electrode pieces 21 generate a fine electric spark between the circumferential side surface facing the workpiece 90 and the workpiece 90, thereby performing electric spark machining on the workpiece 90. Under the drive of a three-axis linkage system of the numerically controlled grinder, the electrode plate 21 can remove the material of the workpiece 90 in the depth feeding direction a of the workpiece 90 through micro electric discharge machining, the feeding speed ranges from 10 mm/min to 200mm/min, and the feeding depth ranges from 10 μm to 100 μm. Preferably, the rotation speed N of the electrode sheet 21 in this embodiment is 1000 rpm, the feeding depth is 50 μm, and the feeding speed a is 20 mm/min.

Meanwhile, the workpiece 90 is micro-cut by the plurality of abrasive grains 212 convexly arranged on the surfaces of the two sides of the electrode plate 21, and the workpiece 90 is further processed. Thus, by the combined machining of discharging and grinding, a plurality of microarray structures (not shown) can be machined on the surface of the workpiece 90 with high efficiency and high accuracy. The micro-array structure can be a micro-groove array structure 91, the cross section of the groove of the micro-groove array structure 91 can be rectangular, trapezoidal or V-shaped, the width range of the groove is 10-800 mu m, the distance range between adjacent grooves is 20-500 mu m, the groove depth range of the groove is 10-100 mu m, and the range of the surface roughness Ra of the processed micro-groove array structure 91 is 0.01-0.5 mu m. Preferably, the micro-groove array structure 91 processed in this embodiment is a trapezoidal groove, the width of the trapezoidal groove is 535 μm, the distance between adjacent trapezoidal grooves is 125 μm, and the depth of the trapezoidal groove is 45 μm.

Further, the pole piece body 211 is annular, the pole piece body 211 includes an inner ring portion 2111 disposed from inside to outside and used for clamping the clamping assembly 30, and an outer ring portion 2112 connected to the inner ring portion 2111 and generating an electric spark with the workpiece 90, and the plurality of abrasive particles 212 are disposed on the ring surface on both sides of the outer ring portion 2112. The inner ring portion 2111 is fitted around the rotating shaft 10 and rotates at a high speed together with the rotating shaft 10. In this embodiment, the electrode body 211 is a common thin electrode made of copper foil, and the thickness range is 5-800 μm.

Furthermore, the abrasive particles 212 contact the workpiece 90, and the distances from the grinding points of the workpiece 90 to the ring surface of the outer ring portion 2112 are equal, and a plurality of the abrasive particles 212 are ring-shaped and uniformly distributed on the ring surface at two sides of the outer ring portion 2112 at equal heights.

Specifically, the abrasive particles 212 are electroplated on the annular surface of the outer annular portion 2112 by an electroplating process, the material of the abrasive particles 212 may be diamond or cubic boron nitride and other super-hard abrasive materials, the particle size range of the abrasive particles 212 is 1000-5000 meshes, and the distance range from the position of the outer annular portion 2112 to the circumferential edge of the pole piece body 211 is 0-10 mm. Preferably, in this embodiment, the abrasive particles 212 are diamond abrasives, the particle size of the diamond abrasives is 3000 meshes, and the minimum value of the distance from the abrasive particles 212 to the circumferential edge of the pole piece body 211 is 6 mm. The outward convex arrangement of the abrasive particles 212 enables the workpiece 90 to be ground, thereby further improving the surface accuracy of the micro-groove array structure 91.

Referring to fig. 3 to 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 gasket 22 is annular and is located between the inner ring portions 2111 of the two adjacent pole piece bodies 211. The diameter of the shim 22 is 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 piece bodies 211, and the thickness of the spacer 22 is 20 to 500 μm. The diameter of the pole piece body 211 is 0.5-5 mm larger than that of the gasket 22. Preferably, the diameter of the pole piece body 211 is 1mm larger than that of the spacer 22 in this embodiment.

Referring to fig. 5, further, the number of the pole piece bodies 211 is three, and in other embodiments, the number of the pole piece bodies 211 may be set according to actual requirements. The thickness of each of the three pole piece bodies 211 in this embodiment is preferably 500 μm. The inner ring portions 2111 of the three pole piece bodies 211 and the spacers 22 disposed between the adjacent inner ring portions 2111 together form a pole piece conductive portion 70; the outer ring portion 2112 of the three pole piece bodies 211 and the abrasive grains 212 uniformly arranged on the ring surface on both sides of the outer ring portion 2112 form an electric discharge grinding portion 60 together. Through the electrical connection of the pole piece conductive part 70, electric sparks can be generated between the discharge grinding part 60 and the workpiece 90, three micro-groove array structures 91 can be machined in parallel at one time, and the machining efficiency is greatly improved.

Further, any adjacent electrode plate 21 and the gasket 22 located between the adjacent electrode plates 21 together enclose to form an annular grinding groove 50, and the groove width of the grinding groove 50 is equal to the thickness of the gasket 22. In the present embodiment, the grinding grooves 50 have a groove width in the range of 20 to 500 μm and two in number. Debris from the tool electrode 20 during grinding can be expelled through both of the grinding flutes 50.

Further, the clamping assembly 30 includes a grinding wheel clamp 32 electrically clamped at two sides of the pole piece conductive portion 70 and a flange clamp 31 clamped at two sides of the grinding wheel clamp 32. The grinding wheel holder 32 clamps the plurality of electrode pads 21 and the spacers 22 from both sides of the pole piece conductive portion 70 to the middle thereof, so that the spacers 22 and the electrode pads 21 are electrically connected to each other well.

Further, the grinding wheel clamp 32 includes a first grinding wheel 321 electrically clamped to the inner ring portion 2111 on one side of the pole piece conductive portion 70, and a second grinding wheel 322 disposed opposite to the first grinding wheel 321 and electrically clamped to the inner ring portion 2111 on the other side of the pole piece conductive portion 70. The first grinding wheel 321 and the second grinding wheel 322 both have good conductivity, and can be in good electrical communication with the pole piece conductive part 70. The first grinding wheel 321 and the second grinding wheel 322 are respectively sleeved on the rotating shaft 10 and press the pole piece conductive part 70 oppositely, so that the pole piece conductive part 70 is fixed on the rotating shaft 10.

Further, the diameter of the first grinding wheel 321 is smaller than that of the pole piece body 211, and the diameter of the second grinding wheel 322 is smaller than that of the pole piece body 211, so that the tool electrode 20 can grind the workpiece 90 from both sides of the electric discharge grinding part 60. The diameter of the pole piece body 211 is 0.5-5 mm larger than the diameters of the first grinding wheel 321 and the second grinding wheel 322. In the present embodiment, the diameters of the first grinding wheel 321, the second grinding wheel 322 and the pad 22 are equal. The diameter of the pole piece body 211 is 1mm larger than the diameter of the first grinding wheel 321, and similarly, 1mm larger than the diameter of the second grinding wheel 322.

The flange clamp 31 includes a fastening flange 311 clamped on one side of the first grinding wheel 321, and a positioning flange 312 disposed opposite to the fastening flange 311 and clamped on one side of the second grinding wheel 322. The fastening flange 311 and the positioning flange 312 clamp the first grinding wheel 321 and the second grinding wheel 322 in opposite directions, respectively.

Further, the fastening flange 311 and the positioning flange 312 are both sleeved and fixed on the rotating shaft 10. The fastening flange 311, the first grinding wheel 321, the pole piece conductive part 70, the second grinding wheel 322, and the positioning flange 312 are sequentially arranged in parallel and are driven by the rotating shaft 10 to rotate around the central axis of the rotating shaft 10.

Further, the superabrasive-coated electrode discharge grinding composite machining apparatus 100 further includes a brush 40. The brush 40 in this embodiment is a graphite brush. One end of the brush 40 is electrically connected to the pulse power source 80, and the other end of the brush 40 is in sliding contact with and electrically connected to the surface of the first grinding wheel 321 facing the fastening flange 311. When the first grinding wheel 321 rotates around the central axis of the rotating shaft 10, the brush 40 slides on the surface of the first grinding wheel 321 and is electrically connected to the first grinding wheel 321, so that the spark generated between the spark grinding portion 60 and the workpiece 90 can be continued.

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 a suitable distance so that the generated electric spark meets the machining requirement of the workpiece 90.

The following describes the working process of the combined machining apparatus for discharge grinding of superabrasive coated electrode provided in the embodiment of the present invention with reference to the specific structure of the embodiment and the accompanying drawings:

the fastening flange 321 and the positioning flange 312 are oppositely disposed and are sleeved and fixed at one end of the rotating shaft 10, the other end of the rotating shaft 10 is connected to the numerically controlled grinder, and the three-shaft linkage system of the numerically controlled grinder enables the rotating shaft 10 to rotate and to move according to a predetermined track in space.

Three sheet electrode pieces 21 are mounted between a first grinding wheel 321 and a second grinding wheel 322 of a grinding wheel jig 32, the three electrode pieces 21 are arranged at intervals, and a spacer 22 is arranged between the adjacent electrode pieces 21. Then, the grinding wheel holder 32 is fitted around one end of the rotary shaft 10 together with the electrode plate 21 and the spacer 22 and fixed between the fastening flange 321 and the positioning flange 312.

The fastening flange 321 axially presses the first grinding wheel 321 and the second grinding wheel 322 in the direction of the positioning flange 322, so that the purpose of fixing the three electrode plates 21 is achieved.

One end of the graphite brush 40 is electrically connected to one pole of the pulse power source 80, the other end is slidably and electrically connected to the first grinding wheel 321, and the conductive workpiece 90 is electrically connected to the other pole of the pulse power source 80.

When the three electrode plates 21 rotate at a high speed along with the rotating shaft 10, the three electrode plates 21 move along a set numerical control machining walking track under the driving of a three-axis numerical control linkage system of the numerically controlled grinding machine, micro electric spark discharge is generated between the electrode plates 21 rotating at the high speed and the workpiece 90, the surface material of the workpiece 90 is removed through the micro electric spark discharge machining along the depth feeding direction a, the material of the workpiece 90 is further removed through micro cutting by the superhard abrasive particles 212 by the outer ring portion 2112 of the electrode plates 21, and therefore a plurality of smooth micro groove array structures 91 are formed on the surface of the workpiece 90 at one time and are machined in parallel and efficiently.

The combined discharge grinding device 100 for the superhard abrasive coating electrode provided by the embodiment of the invention has wide adaptability, and can machine various three-dimensional microarray structures 91 on the surface of any workpiece 90. Electrode slice 21's loss is less, need not frequently change electrode slice 21, and high-speed rotatory electrode slice 21 can carry out self-repairing to the shape and the circularity of self, and it is also convenient that the change of the pole piece body 211 that has the grit 212 of electroplating, and machining efficiency and machining precision are high, can once take shape and process out many microgroove array structure 91 side by side, greatly improve machining efficiency, and the grinding effect of grit 212 on the electrode slice 21 can guarantee that the microgroove array structure 91 of processing has very high machining precision.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (16)

1. The utility model provides a superhard abrasive material cladding electrode grinding combined machining device that discharges for process the work piece, its characterized in that, superhard abrasive material cladding electrode grinding combined machining device that discharges includes tool electrode, be used for providing pulse discharge and with work piece connection of electric lines and with tool electrode connection of electric lines's pulse power supply, be used for the drive the rotatory rotary actuator of tool electrode and be used for the drive rotary actuator removes the removal driver that removes in the space, tool electrode is including being used for producing electric spark in order to process a plurality of electrode slices of work piece and being used for the centre gripping a plurality of the electrode slice and with the centre gripping subassembly that rotary actuator connects, centre gripping subassembly connection of electric lines pulse power supply, rotary actuator passes through centre gripping subassembly drive the electrode slice rotates, the electrode slice include a plurality of make by conducting material and with centre gripping subassembly connection of electric lines's pole piece body and a plurality of making by superhard material make by pole piece body And the abrasive grains are convexly arranged on the two side surfaces of the pole piece body, the granularity range of the abrasive grains is 1000-5000 meshes, and the abrasive grains are used for grinding the workpiece so as to improve the surface precision of the workpiece to be processed.

2. The combined discharge grinding and machining apparatus for superabrasive coated electrodes according to claim 1, characterized in that: the pole piece body is annular, the pole piece body includes by interior confession that sets up outward the interior ring portion of centre gripping subassembly centre gripping and connect on the interior ring portion and with produce the outer ring portion of electric spark between the work piece, a plurality of the grit set up in the anchor ring of outer ring portion both sides.

3. The combined discharge grinding and machining apparatus for superabrasive coated electrodes according to claim 2, characterized in that: the abrasive particles are uniformly distributed on the ring surfaces on two sides of the outer ring part in an annular mode, and distances from grinding points of the abrasive particles to the ring surface of the outer ring part are equal.

4. The combined discharge grinding and machining apparatus for superabrasive coated electrodes according to claim 2, characterized in that: the tool electrode further includes a shim made of a conductive material and disposed between adjacent ones of the pole piece bodies.

5. The combined discharge grinding and machining device for the superabrasive coated electrodes according to claim 4, characterized in that: the gasket is circular and is positioned between the inner ring parts of the two adjacent pole piece bodies and is communicated with the two adjacent pole piece bodies through wires.

6. A combined discharge grinding apparatus according to claim 5, characterised in that: the diameter of the gasket is smaller than that of the pole piece body.

7. A combined discharge grinding apparatus according to claim 5, characterised in that: the number of the pole piece bodies is three, and the inner ring parts of the three pole piece bodies and the gaskets arranged between the adjacent inner ring parts form a pole piece conductive part together; the outer ring parts of the three pole piece bodies and the abrasive particles uniformly arranged on the ring surfaces of the two sides of the outer ring parts form discharge grinding parts together.

8. A superabrasive coated electrode discharge grinding combination machining apparatus according to claim 7, wherein: the clamping assembly comprises a grinding wheel clamp and flange clamps, wherein the grinding wheel clamp is electrically clamped on two sides of the conductive part of the pole piece, and the flange clamps are clamped on two sides of the grinding wheel clamp.

9. The combined discharge grinding and machining apparatus for superabrasive coated electrodes according to claim 8, characterized in that: the grinding wheel clamp comprises a first grinding wheel and a second grinding wheel, wherein the first grinding wheel is electrically clamped on the inner ring portion on one side of the pole piece conductive portion, and the second grinding wheel is arranged opposite to the first grinding wheel and is electrically clamped on the inner ring portion on the other side of the pole piece conductive portion.

10. A superabrasive coated electrode discharge grinding combination machining apparatus according to claim 9, wherein: the diameter of the first grinding wheel is smaller than that of the pole piece body, and the diameter of the second grinding wheel is smaller than that of the pole piece body.

11. A superabrasive coated electrode discharge grinding combination machining apparatus according to claim 9, wherein: the flange clamp comprises a fastening flange clamped on one side of the first grinding wheel and a positioning flange arranged opposite to the fastening flange and clamped on one side of the second grinding wheel.

12. A superabrasive coated electrode discharge grinding composite machining apparatus according to claim 11, characterized in that: the positioning flange is rotatably connected to the rotary driver; the fastening flange, the first grinding wheel, the pole piece conductive part, the second grinding wheel and the positioning flange are sequentially arranged in parallel.

13. A superabrasive coated electrode discharge grinding composite machining apparatus according to claim 11, characterized in that: the combined machining device for discharge grinding of the superhard abrasive coating electrode further comprises an electric brush, one end of the electric brush is connected with the pulse power supply through an electric wire, and the other end of the electric brush is in sliding contact with the first grinding wheel through the electric wire and is connected onto the surface, facing the fastening flange, of the first grinding wheel.

14. A superabrasive coated electrode discharge grinding combination machining apparatus according to claim 13, wherein: the workpiece, the pulse power source, the brush, and the tool electrode are sequentially connected by wires and the workpiece and the tool electrode are disposed at a predetermined distance to generate an electric discharge to machine the workpiece.

15. A superabrasive coated electrode discharge grinding composite machining apparatus according to any one of claims 1 to 14, characterized in that: the pulse voltage range of the pulse power supply is 20-150V, the pulse frequency range is 100-5000 Hz, and the pulse width range is 0.2-100 mus.

16. A discharge grinding combined machining method for a superhard abrasive coating electrode is used for machining a workpiece and is characterized by comprising the following machining steps:

the preparation method comprises the following steps: preparing a superabrasive coated electrode discharge grinding composite machining apparatus according to any one of claims 1 to 15;

workpiece presetting: placing the workpiece in a proper position to cooperate with the superhard abrasive material coating electrode discharge grinding combined machining device;

the processing steps are as follows: the rotary driver drives the tool electrode to rotate at a high speed, the movable driver drives the rotary driver to move in space, a discharge loop is formed among the workpiece, the tool electrode and the pulse power supply, micro electric spark discharge is generated between the electrode slice and the workpiece to erode the workpiece, and the abrasive particles cut the workpiece.

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