CN112372098B - Straight-line component wire cut electrical discharge machining device and method - Google Patents

Straight-line component wire cut electrical discharge machining device and method Download PDF

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Publication number
CN112372098B
CN112372098B CN202011214910.1A CN202011214910A CN112372098B CN 112372098 B CN112372098 B CN 112372098B CN 202011214910 A CN202011214910 A CN 202011214910A CN 112372098 B CN112372098 B CN 112372098B
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wire
numerical control
workpiece
electric discharge
electrode
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CN112372098A (en
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曲宁松
房晓龙
胡孝昀
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H11/00—Auxiliary apparatus or details, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/08—Wire electrodes
    • B23H7/10—Supporting, winding or electrical connection of wire-electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/26—Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/36—Supply or regeneration of working media

Abstract

The invention discloses a straight-line component wire cut electrical discharge machining device and method. The straight-line member wire-cut electric discharge machine includes: the wire electrode assembly, the numerical control platform and the numerical control system are arranged; the numerical control platform is electrically connected with the numerical control system; the numerical control platform is used for fixing a workpiece to be processed; the numerical control system is used for controlling the numerical control platform to do reciprocating motion according to a preset machining track so as to drive the workpiece to be machined and the wire electrode assembly to form reciprocating relative feeding motion; the wire electrode assembly is used for cutting a workpiece to be processed in an environment of deionized water. The invention solves the problems of an oxide layer, a recast layer, microcracks and the like on the surface of a workpiece after the conventional processing method of the ruled surface member.

Description

Straight-line component wire cut electrical discharge machining device and method
Technical Field
The invention relates to the field of electromachining, in particular to a straight-line component electrospark wire-electrode cutting device and a method.
Background
The ruled surface component is widely applied to the fields of aerospace, weapon manufacturing and the like. For example, aircraft engine blade dovetail/tongue and groove structures, gears, blanking dies, and the like are typical ruled surface members. The conventional cutting methods for the ruled surface component comprise water jet cutting, gas flame cutting, plasma arc cutting, laser cutting, electric spark wire cutting and the like.
The water jet cutting is performed by means of impact of high-speed and high-density water jet, and abrasive is added into the water jet, so that the kinetic energy of the water jet is larger, and the cutting efficiency is improved. The pure water type high-pressure water jet is suitable for cutting materials with softer texture, such as rubber, cloth and the like; the abrasive-added high-pressure water jet is suitable for cutting hard materials such as metal materials, ceramics, composite materials and the like, but the high-pressure water jet has the problems of large notch width, asymmetric notch shape, oblique cutting surface, poor roughness of the cutting surface and the like, and cannot realize the precision machining of parts with large thickness.
The plasma arc cutting is to melt and evaporate local metal by means of high temperature and high speed plasma arc and its flame flow and to blow away from the substrate to form cut seam with the movement of the plasma arc cutting torch. Plasma arc cutting is widely used and suitable for cutting various metal materials, but plasma arc has the problems of workpiece deformation and the like, and cannot realize precision machining of parts with large thickness.
The gas flame cutting is a method for preheating metal at a cutting part of a workpiece to a certain temperature by using flame heat energy generated by mixing and burning combustible gas and oxygen, and then spraying high-speed cutting oxygen flow to burn the metal at the preheating part and release heat to realize cutting. The gas flame cutting is widely applied in production, but the gas flame cutting has the problems of large cutting deformation, low dimensional precision, heat affected zone and the like.
Laser machining is thermal machining that produces a melt that, if not removed from the surface of the material in a timely manner, re-welds to the material being machined, forming a recast layer. The recasting layer is a quenching casting structure formed by rapidly cooling a molten material on the surface of a part, and the interior of the recasting layer often contains microcracks, which easily causes the part to break and damage.
The wire cut electrical discharge machining is one of the cutting machining methods of metal-based materials, can machine any conductive material difficult to machine and surfaces with complex shapes, and is widely applied to the fields of aerospace, mold manufacturing and the like. Wire electric discharge machining is a machining process in which a workpiece is cut to a predetermined size, shape, or the like by removing a local material of the workpiece by utilizing an electroerosion phenomenon in pulse spark discharge between an electrode wire and the workpiece. Through the relative feed motion between the electrode wire and the workpiece, the wire-cut electric discharge machine can process various structures with ruled surfaces, and has strong processing flexibility and high processing efficiency. Meanwhile, the surface of the workpiece after wire cut electrical discharge machining inevitably has defects such as an oxide layer, a recast layer, microcracks and the like, and the surface integrity is not high.
Because of the welding performance requirements of straight-line surface components such as honeycomb structures and the like, and because of the high fatigue life and high reliability indexes of straight-line surface components such as tenon/mortise structures of blades of aero-engines, the existence of recast layers and microcracks on the working surface is strictly forbidden, and the subsequent treatment is needed to remove oxide layers, recast layers and microcracks. If the mechanical grinding mode is adopted, the deformation of the thin-wall honeycomb workpiece is inevitably caused. Therefore, how to cut and process straight-line surface components such as honeycomb materials, aviation engine blade tenons/mortises and the like which meet the surface quality requirements of workpieces becomes a problem which needs to be solved urgently.
Disclosure of Invention
Therefore, the straight-line member wire electric discharge machining device and the straight-line member wire electric discharge machining method are needed to solve the problems that an oxidation layer, a recast layer, a micro-crack and the like exist on the surface of a workpiece after the straight-line surface member is machined by a conventional machining method.
In order to achieve the purpose, the invention provides the following scheme:
a straight-grained member wire-cut electric discharge machine comprising: the wire electrode assembly, the numerical control platform and the numerical control system are arranged; the numerical control platform is electrically connected with the numerical control system; the numerical control platform is used for fixing a workpiece to be processed; the numerical control system is used for controlling the numerical control platform to do reciprocating motion according to a preset machining track so as to drive the workpiece to be machined and the wire electrode assembly to form reciprocating relative feeding motion; the wire electrode assembly is used for cutting the workpiece to be processed in the environment of deionized water.
Optionally, the wire electrode assembly comprises a wire storage barrel and a wire electrode; the wire storage barrel is used for driving the electrode wire to reciprocate in the vertical direction.
Optionally, the wire electrode assembly further includes: a pulse power supply; the positive electrode of the pulse power supply is electrically connected with the workpiece to be processed; and the negative electrode of the pulse power supply is electrically connected with the electrode wire.
Optionally, the wire electrode assembly further includes: a lead block; the electric lead block is placed on the electrode wire; the electrode wire is electrically connected with the negative electrode of the pulse power supply through the electric lead block.
Optionally, the wire electric discharge machining device for the straight-line member further comprises a clamp; and the workpiece to be processed is fixed on the numerical control platform through the clamp.
Optionally, the numerical control platform includes an X axis and a Y axis; the X axis and the Y axis are both electrically connected with the numerical control system; the numerical control system is used for controlling the X axis and the Y axis to reciprocate on a horizontal plane according to a preset processing track; the moving direction of the X axis is vertical to the moving direction of the Y axis.
Optionally, the wire-cut electric discharge machining device for the straight-line member further comprises an auxiliary flushing system; the auxiliary flushing system is used for spraying deionized water to a machining area where the electrode wire assembly cuts the workpiece to be machined.
The invention also provides a straight-line member wire-cut electric discharge machining method, which is used for the straight-line member wire-cut electric discharge machining device; the method comprises the following steps:
controlling the numerical control platform to do reciprocating motion according to a preset machining track so as to drive a workpiece to be machined and the wire electrode assembly to form reciprocating relative feeding motion, and enabling the wire electrode assembly to cut the workpiece to be machined in a deionized water environment;
and when the times of reciprocating motion reaches the set times, controlling the numerical control platform to stop moving.
Optionally, before controlling the numerical control platform to reciprocate according to the preset processing track, the method further includes:
and controlling the electrode wire in the electrode wire assembly to reciprocate in the vertical direction.
Optionally, before controlling the numerical control platform to reciprocate according to the preset processing track, the method further includes:
and spraying deionized water to a processing area of the electrode wire assembly for cutting the workpiece to be processed.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a straight-line component wire cut electric discharge machining device and method. The numerical control platform in the device is electrically connected with a numerical control system; the numerical control platform is used for fixing a workpiece to be processed; the numerical control system is used for controlling the numerical control platform to do reciprocating motion according to a preset machining track so as to drive the workpiece to be machined and the wire electrode assembly to form reciprocating relative feeding motion; the wire electrode assembly is used for cutting a workpiece to be processed in an environment of deionized water. When the device does reciprocating motion once according to the original preset processing track, a thin oxide layer/recast layer on the surface of the workpiece is removed, the process is repeated, the workpiece reciprocates for many times according to the original preset processing track, the oxide layer/recast layer and microcracks on the surface of the workpiece are basically and completely removed, the problems that the oxide layer, the recast layer, the microcracks and the like exist on the surface of the workpiece after the conventional processing method of the ruled surface member is used for processing are solved, and the surface quality of the processed ruled member meets the processing requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a structural view of a linear electric discharge machine for a straight thread member according to an embodiment of the present invention;
fig. 2 is a schematic view of a machining state of a straight-line member electric discharge wire cutting apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wire electric discharge machining process of a tongue and groove structure, in which part (a) of fig. 3 is a schematic diagram of a first stage of the machining process, part (b) of fig. 3 is a schematic diagram of a first state in a second stage of the machining process, part (c) of fig. 3 is a schematic diagram of a second state in the second stage of the machining process, and part (d) of fig. 3 is a schematic diagram of a workpiece after the machining is completed;
FIG. 4 is a schematic view of wire electrical discharge machining of a honeycomb structure;
FIG. 5 is a surface scanning electron micrograph of a once-cut ruled surface of a ruled surface member according to an embodiment of the present invention, wherein part (a) of FIG. 5 is a low-magnification SEM topography of a once-cut machined surface of the ruled surface member, and part (b) of FIG. 5 is a high-magnification SEM topography of the machined surface member;
FIG. 6 is a surface scanning electron micrograph of a ruled texture member cut twice according to an embodiment of the present invention, wherein part (a) of FIG. 6 is a SEM topography of a cut twice machined surface, and part (b) of FIG. 6 is a SEM topography of a cut twice machined surface;
fig. 7 is a surface scanning electron image of a ruled member cutting process six times according to an embodiment of the present invention, wherein part (a) of fig. 7 is a low-magnification SEM topography of a six-time processed surface of the cutting process, and part (b) of fig. 7 is a high-magnification SEM topography of the six-time processed surface of the cutting process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The wire-cut electric discharge machining device for the straight-line component provided by the embodiment is a wire-cut electric discharge machining device for a straight-line component with few/no surface oxide layers, and is used for a wire-cut electric discharge machining device for a blade tenon/mortise structure of an aircraft engine.
Fig. 1 is a structural view of a linear electric discharge machine for a straight thread member according to an embodiment of the present invention.
Referring to fig. 1, the linear electric discharge wire cutting device of the straight thread member in the present embodiment includes: the wire electrode assembly, the numerical control platform 1 and the numerical control system 8 are arranged in the machine; the numerical control platform 1 is electrically connected with the numerical control system 8; the numerical control platform 1 is used for fixing a workpiece 6 to be processed; the numerical control system 8 is used for controlling the numerical control platform 1 to reciprocate according to a preset processing track, so as to drive the workpiece 6 to be processed and the wire electrode assembly to form reciprocating relative feeding motion; the wire electrode assembly is used for cutting the workpiece 6 to be processed in the environment of deionized water 5. Fig. 2 shows a machining state of the linear electric discharge machine.
As an alternative embodiment, the wire electrode assembly comprises a wire storage barrel 3, a wire electrode 4 and a pulse power supply 2; the wire storage barrel 3 is used for driving the wire electrode 4 to reciprocate in the vertical direction; the positive electrode of the pulse power supply 2 is electrically connected with the workpiece 6 to be processed; and the negative electrode of the pulse power supply 2 is electrically connected with the electrode wire 4.
As an alternative embodiment, the wire electrode assembly further comprises: a lead block 11; the lead block 11 is placed on the electrode wire 4; the electrode wire 4 is electrically connected with the negative electrode of the pulse power supply 2 through the electric lead block 11.
As an alternative embodiment, the straight-line member electric discharge wire cutting device further includes a jig 7; and the workpiece 6 to be processed is fixed on the numerical control platform 1 through the clamp 7.
As an alternative embodiment, the numerical control platform 1 comprises an X axis and a Y axis; the X axis and the Y axis are both electrically connected with the numerical control system 8; the numerical control system 8 is used for controlling the X axis and the Y axis to reciprocate on a horizontal plane according to a preset processing track; the moving direction of the X axis is vertical to the moving direction of the Y axis.
As an alternative embodiment, the straight-line member wire-cut electric discharge machine further includes an auxiliary flushing system; the auxiliary flushing system is used for spraying deionized water 5 to a machining area of the workpiece 6 to be machined cut by the wire electrode assembly.
The following is a specific implementation process of the straight-grain member wire-cut electric discharge machine.
Step 1, connecting a wire electrode 4 with the cathode of a pulse power supply 2 through a lead block 11, connecting a workpiece 6 to be processed with the anode of the pulse power supply 2, and fixing the workpiece 6 to be processed on a numerical control platform 1 through a clamp 7; deionized water 5 is used as a working medium; in the processing process, the workpiece 6 to be processed is always in the deionized water environment, and the processing parameters such as voltage and the like in the whole processing process are kept unchanged.
And 2, under the control of the numerical control system 8, the numerical control platform 1 drives the workpiece 6 to be machined and the wire electrode 4 to perform relative feeding motion according to a preset machining track, spark discharge is generated between the wire electrode 4 and the workpiece to perform electric spark cutting machining, and local materials are eroded to achieve the structural shape of the workpiece which is designed in advance.
And 3, the workpiece 6 to be machined reciprocates in situ for multiple times according to the preset machining track in the step 2 under the drive of the numerical control platform 1, in the process, the interelectrode gap is larger than the discharge gap, the interelectrode voltage cannot puncture the interelectrode medium, the spark discharge phenomenon is not generated, and the micro-electrolysis effect occurs, so that under the action of the pulse power supply 2, the micro-electrolysis effect of anode dissolution can remove an oxide layer/recast layer 9 and micro-cracks 10 generated in the electric spark machining process, and the machining quality is improved.
The straight-line member wire electric discharge machining device in the embodiment has the following advantages:
1. in the step 3, when the workpiece 6 to be machined does reciprocating motion once according to the original preset machining track, a thin oxide layer/recast layer 9 on the surface of the workpiece is removed, the process is repeated, the workpiece does reciprocating motion for many times according to the original track, and the oxide layer/recast layer 9 and the microcracks 10 on the surface of the workpiece are basically and completely removed; after the processing is finished, the straight grain component with the surface quality meeting the processing requirement can be obtained.
2. The deionized water 5 is used as a working medium, so that the micro-electrolysis between two electrodes in the working medium is realized, an oxide layer/recast layer 9 and micro-cracks 10 existing on the surface of a workpiece during wire-cut electric discharge machining can be removed in situ, a straight-line component meeting the surface quality requirement can be obtained by one-time wire-cut electric discharge machining, the influence of post-treatment after wire-cut electric discharge machining on the dimensional precision and the like of the workpiece is avoided, and the machining efficiency, the machining precision and the surface quality of the workpiece are improved; furthermore, kerosene cannot be used as the working medium, and the specific resistance thereof is too large to satisfy the micro-electrolysis in step 3.
3. The whole processing process does not change electrical parameters, and the deionized water 5 is adopted as a working medium, so that ignition is avoided, and safe and unmanned operation can be realized.
4. The wire-cut electric discharge machine for the straight-line member can be used on the existing electric discharge machine tool, so that the investment cost is low.
The invention also provides a straight-line member wire-cut electric discharge machining method, which is used for the straight-line member wire-cut electric discharge machining device in the embodiment; the method comprises the following steps:
and controlling the wire electrode 4 in the wire electrode assembly to reciprocate in the vertical direction.
And spraying deionized water 5 to a processing area of the electrode wire assembly for cutting the workpiece 6 to be processed.
And controlling the numerical control platform 1 to do reciprocating motion according to a preset processing track so as to drive the workpiece 6 to be processed and the wire electrode assembly to form reciprocating relative feeding motion, so that the wire electrode assembly cuts the workpiece 6 to be processed in the environment of deionized water 5.
And when the times of reciprocating motion work reach the set times, controlling the numerical control platform 1 to stop moving.
Two specific examples are provided below to further illustrate the wire electric discharge machining system and method for straight-line members in the above embodiments.
Specific example 1:
taking a turbine disc mortise as an example, as shown in fig. 1, when performing the electric spark wire cutting machining of the tenon/mortise, the wire electrode 4 is wound on the wire storage cylinder 3, the wire storage cylinder 3 rotates forward and backward to drive the wire electrode 4 to reciprocate up and down, the deionized water 5 is sprayed to a machining area through the auxiliary flushing system, the wire electrode 4 is connected with the negative electrode of the pulse power supply 2 through the lead block 11, the workpiece 6 to be machined is connected with the positive electrode of the pulse power supply 2, the workpiece 6 to be machined is fixed on the numerical control platform 1 through the clamp 7, a pre-designed track is programmed on the numerical control system 8, so that the numerical control platform 1 drives the workpiece 6 to be machined and the wire electrode 4 to perform relative feeding motion through the clamp 7, and the preset shape of the workpiece 6 to be machined is cut and machined.
As shown in part (a) of fig. 3, the workpiece 6 to be machined and the wire electrode 4 are relatively moved in a feeding manner, the deionized water 5 fills the entire machining area, and spark discharge occurs between the workpiece 6 to be machined and the wire electrode 4 to remove a local material, thereby cutting and machining the workpiece 6 to be machined into a predetermined shape.
As shown in fig. 3 (b), the surface of the workpiece 6 to be machined after the wire-cut electric discharge machining has an oxide layer/recast layer 9 and microcracks 10, which affect the usability of the workpiece 6 to be machined.
As shown in part (c) of fig. 3, after the workpiece 6 to be machined moves back along the predetermined trajectory, the workpiece 6 to be machined moves back along the original trajectory in the opposite direction, at this time, because the wire cut electrical discharge machining makes the gap between the workpiece 6 to be machined and the wire electrode 4 relatively large, the inter-electrode voltage cannot break through the inter-electrode medium, so the spark discharge phenomenon does not occur any more, the working medium adopts deionized water 5, and the electrolysis current is significant in the open circuit state, so the micro-electrolysis effect occurs between the wire electrode 4 and the workpiece 6 to be machined, the workpiece 6 to be machined is used as an anode, the surface oxide layer/recast layer 9 and the micro-cracks 10 are gradually dissolved, meanwhile, the up-and-down reciprocating motion of the wire electrode 4 also promotes the discharge of the machined product, the machining efficiency and the machining quality are improved, when the workpiece 6 to be machined moves back to the machining start position along the original trajectory, the oxide layer/recast layer 9 on the surface of the workpiece 6 to be machined is uniformly removed, then the workpiece 6 to be processed reciprocates according to the original processing track, and one layer of the oxide layer/recast layer 9 on the surface of the workpiece 6 to be processed is removed every time the workpiece 6 to be processed reciprocates.
As shown in part (d) of fig. 3, after the workpiece 6 to be machined reciprocates for several times according to the machining trajectory, the oxide layer/recast layer 9 and the microcracks 10 on the surface of the workpiece 6 to be machined are all removed, and the tongue-and-groove structure meeting the surface quality requirement is obtained.
Specific example 2:
taking a honeycomb member as an example, as shown in fig. 4, the honeycomb member 12 reciprocates under the same processing conditions as in example 1 to remove the recast layer and the microcracks 10 on the surface.
FIG. 5 is a surface scanning electron image of a ruled member once cut according to an embodiment of the present invention, in which a significant oxide layer is visible on the surface of a workpiece 6 to be processed, and the oxygen content is 8.2 WT% by X-ray energy spectrum analysis; fig. 6 is a surface scanning electron map of the ruled member of the embodiment of the present invention, in which the processed surface of the workpiece 6 to be processed is significantly thinner than the surface of the workpiece 6 to be processed that is processed once, and the oxygen content is 4.03 WT% by X-ray energy spectrum analysis; FIG. 7 is an electron image of six surface scans of a ruled member according to an embodiment of the present invention, showing that the oxide layer on the surface of the ruled member is substantially removed, and the oxygen content of the ruled member is 2.01 WT% by X-ray energy spectrum analysis.
By the cutting processing, detection and analysis, the processing method realizes the cutting processing of the straight line component with less/no surface oxide layer and meeting the surface quality requirement.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (9)

1. A linear member electric discharge wire cutting device characterized by comprising: the wire electrode assembly, the numerical control platform and the numerical control system are arranged; the numerical control platform is electrically connected with the numerical control system; the numerical control platform is used for fixing a workpiece to be processed; the numerical control system is used for controlling the numerical control platform to do reciprocating motion according to a preset machining track so as to drive the workpiece to be machined and the wire electrode assembly to form reciprocating relative feeding motion; the wire electrode assembly is used for cutting the workpiece to be processed in the environment of deionized water; the wire electrode assembly comprises a wire storage barrel and a wire electrode; the wire storage barrel is used for driving the electrode wire to reciprocate in the vertical direction.
2. The wire electric discharge machine of claim 1, wherein the wire electrode assembly further comprises: a pulse power supply; the positive electrode of the pulse power supply is electrically connected with the workpiece to be processed; and the negative electrode of the pulse power supply is electrically connected with the electrode wire.
3. The wire electric discharge machine of claim 2, wherein the wire electrode assembly further comprises: a lead block; the electric lead block is placed on the electrode wire; the electrode wire is electrically connected with the negative electrode of the pulse power supply through the electric lead block.
4. The wire electric discharge machine for straight-line members according to claim 1, further comprising a jig; and the workpiece to be processed is fixed on the numerical control platform through the clamp.
5. The wire electric discharge machine of claim 1, wherein the numerically controlled stage comprises an X-axis and a Y-axis; the X axis and the Y axis are both electrically connected with the numerical control system; the numerical control system is used for controlling the X axis and the Y axis to reciprocate on a horizontal plane according to a preset processing track; the moving direction of the X axis is vertical to the moving direction of the Y axis.
6. The wire electric discharge machine for straight-line members according to claim 1, further comprising an auxiliary flushing system; the auxiliary flushing system is used for spraying deionized water to a machining area where the electrode wire assembly cuts the workpiece to be machined.
7. A wire electric discharge machining method for a straight-line member according to any one of claims 1 to 6, characterized by being used in the wire electric discharge machining apparatus for a straight-line member; the method comprises the following steps:
controlling the numerical control platform to do reciprocating motion according to a preset machining track so as to drive a workpiece to be machined and the wire electrode assembly to form reciprocating relative feeding motion, and enabling the wire electrode assembly to cut the workpiece to be machined in a deionized water environment;
and when the reciprocating motion times reach the set times, controlling the numerical control platform to stop moving.
8. The wire electric discharge machining method for the straight-line member according to claim 7, wherein before the controlling numerical control platform reciprocates according to a preset machining trajectory, the wire electric discharge machining method further comprises:
and controlling the electrode wire in the electrode wire assembly to reciprocate in the vertical direction.
9. The wire electric discharge machining method for the straight-line member according to claim 7, wherein before the controlling numerical control platform reciprocates according to a preset machining trajectory, the wire electric discharge machining method further comprises:
and spraying deionized water to a processing area of the electrode wire assembly for cutting the workpiece to be processed.
CN202011214910.1A 2020-11-04 2020-11-04 Straight-line component wire cut electrical discharge machining device and method Active CN112372098B (en)

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