CN110756931A - Electric discharge machine electrode clamping correction method and system - Google Patents

Electric discharge machine electrode clamping correction method and system Download PDF

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Publication number
CN110756931A
CN110756931A CN201911227052.1A CN201911227052A CN110756931A CN 110756931 A CN110756931 A CN 110756931A CN 201911227052 A CN201911227052 A CN 201911227052A CN 110756931 A CN110756931 A CN 110756931A
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China
Prior art keywords
electrode
positioning
point
vertical
melting
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CN201911227052.1A
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Chinese (zh)
Inventor
黄文浩
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Dongguan Dimon Numerical Control Machinery Co Ltd
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Dongguan Dimon Numerical Control Machinery Co Ltd
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Priority to CN201911227052.1A priority Critical patent/CN110756931A/en
Publication of CN110756931A publication Critical patent/CN110756931A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H7/00Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/26Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H1/00Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H11/00Auxiliary apparatus or details, not otherwise provided for

Abstract

The invention discloses an electric discharge machine electrode clamping correction method and a system, wherein a workpiece to be processed and a positioning jig are both arranged on a workbench, and the coordinates of the positioning point of the positioning part of the positioning jig are predetermined as (X1, Y1); placing the electrode on a positioning jig, wherein the reference point of a reference table is overlapped with the positioning point of the positioning part, and at the moment, the electrode is in a horizontal alignment state; knowing that the length of the reference platform of the electrode is L and the width of the reference platform of the electrode is W, calculating and determining the coordinates of the center point of the electrode at the moment as (X3 and Y3) according to the coordinates (X1 and Y1) of the positioning point of the positioning part of the positioning jig; clamping the connecting rod to a machining head of an electric spark machine, connecting and fixing the end part of the connecting rod with the upper end face of the electrode after the connecting rod is heated, melted and shaped through low-melting-point metal materials, and at the moment, the electrode is fixedly connected and still keeps a horizontal alignment state, so that the electrode clamping correction is completed.

Description

Electric discharge machine electrode clamping correction method and system
Technical Field
The invention relates to an electrode clamping correction technology in the process of machining of an electric discharge machine, in particular to an electrode clamping correction method and system of the electric discharge machine.
Background
When an electric spark machine is processed, an electrode (commonly called as a copper electrode or a copper electrode) needs to be clamped and corrected, and the approximate operation flow is as follows: a workpiece to be processed is clamped on a workbench of an electric spark machine, and an electrode is clamped on a processing machine head of the electric spark machine; centering the workpiece on the workbench through a standard ball, positioning a central point of the workpiece to be machined (acquiring a coordinate of the central point of the workpiece to be machined), clamping the electrode (necessarily having a certain inclination or not being straightened), performing multiple fine adjustment attempts by a professional operator through a universal adjusting head (capable of performing fine adjustment of left and right inclination, fine adjustment of front and back inclination and fine adjustment of horizontal rotation) on a machining head in cooperation with an adjusting detector and a reference platform of the electrode (a reference of the electrode), and adjusting and correcting the electrode after 2 to 5 minutes to be horizontal and straightened; after the electrode is corrected, centering the electrode on a reference table matched with the electrode through a standard ball at the periphery of the workpiece, positioning the center point of the electrode (acquiring the coordinates of the center point of the electrode at the moment), then leading the electrode by a processing machine, moving the coordinates of the center point of the electrode at the periphery of the workpiece to the coordinates of the center point of the workpiece (aligning and coinciding the center of the electrode with the center of the workpiece), setting the center point of the workpiece as zero coordinates (0, 0), and then moving the electrode to a position to be processed according to a coordinate system of a drawing corresponding to the workpiece to perform electric spark processing. Moreover, as a workpiece is machined, the machining shapes or sizes of a plurality of positions of the workpiece are different, a whole set of a plurality of electrodes are required to be matched, each time when one electrode is replaced for machining, the electrodes are required to be adjusted and corrected once after being clamped, and meanwhile, the electrodes are required to be centered and positioned at a central point once, and then the center points of the workpiece are moved to be aligned. The whole operation process is time-consuming and labor-consuming, affects the processing efficiency and the processing quality, and is necessary to be equipped with professional operators (mainly because the correction of the electrodes requires professional personnel). Therefore, the traditional electrode clamping correction technology of the electric discharge machine has many unreasonable places and needs to be improved and perfected.
Disclosure of Invention
Aiming at the defects, the invention aims to provide the method and the system for clamping and correcting the electrode of the electric discharge machine, which can clamp and correct the electrode simply, conveniently and quickly, quickly locate the central point of the electrode, are efficient and reliable and ensure the quality; moreover, for a set of a plurality of electrodes, when the electrodes are replaced, time-consuming adjustment and correction of the electrodes by means of a regulating detector are not needed, and the electrodes do not need to be positioned and centered for a plurality of times by means of a standard ball.
The technical scheme adopted by the invention is as follows: the method for correcting the clamping of the electrode of the electric discharge machine is characterized by comprising the following steps of:
1) arranging a positioning jig, wherein the positioning jig is provided with a positioning part matched with a reference platform of an electrode, the reference platform of the electrode comprises a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface, the first vertical reference surface is vertically intersected with the second vertical reference surface, the first horizontal reference surface is intersected with the first vertical reference surface to form a transverse reference edge, the first horizontal reference surface is intersected with the second vertical reference surface to form a longitudinal reference edge, the intersection point of the transverse reference edge and the longitudinal reference edge is the reference point of the reference platform of the electrode, the positioning part comprises a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface, the first vertical positioning surface is vertically intersected with the second vertical positioning surface, the first horizontal positioning surface is intersected with the first vertical positioning surface to form a transverse positioning edge, and the first horizontal positioning surface is intersected with the second vertical positioning surface, forming a longitudinal positioning edge, wherein the intersection point of the transverse positioning edge and the longitudinal positioning edge is a positioning point of the positioning part; arranging a connecting rod;
2) the workpiece to be machined and the positioning jig are arranged on a workbench of the electric discharge machine, the positioning jig is positioned on the side of the workpiece to be machined, and the coordinates of the positioning point of the positioning part of the positioning jig are determined to be (X1, Y1); placing the electrode on a positioning jig, wherein a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface of a reference table of the electrode are respectively matched with a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface of a positioning part of the positioning jig, so that a transverse reference edge and a longitudinal reference edge are respectively superposed with a transverse positioning edge and a longitudinal positioning edge, the reference point of the reference table is superposed with the positioning point of the positioning part, and at the moment, the electrode is in a horizontal alignment state; knowing that the length of the reference platform of the electrode is L and the width of the reference platform of the electrode is W, the distances from the center point of the electrode to the transverse reference side and the longitudinal reference side are L/2 and W/2 respectively, and then calculating and determining the coordinates of the center point of the electrode at the moment as (X3 and Y3) according to the coordinates (X1 and Y1) of the positioning point of the positioning part of the positioning jig; clamping the connecting rod to a machining head of an electric spark machine, connecting and fixing the end part of the connecting rod with the upper end face of the electrode after the connecting rod is heated, melted and shaped through low-melting-point metal materials, and at the moment, the electrode is fixedly connected and still keeps a horizontal alignment state, so that the electrode clamping correction is completed.
Further, the method also comprises the following steps: 3) the center point of the workpiece is determined to be (X2, Y2), the electrode is moved from the coordinates (X3, Y3) to the coordinates (X2, Y2), the center point of the electrode is aligned and superposed with the center point of the workpiece, the center point of the workpiece is set to be the zero point coordinate (0, 0), a relative coordinate system is established, and then the electrode is moved to the position needing to be machined according to the coordinates of the drawing corresponding to the workpiece, and electric spark machining is carried out.
Further, the low-melting-point metal material is pure metal or alloy with the melting point of 60-300 ℃. The low melting point metal material is preferably a Sn metal material or a Sn alloy material.
Further, in step 2), the end of the connecting rod is connected and fixed with the upper end face of the electrode after being heated, melted and shaped by the low-melting-point metal material, and the method specifically comprises the following four modes: the upper end surface of the electrode is preset with a low-melting-point metal material, the low-melting-point metal material on the upper end surface of the electrode is directly heated and melted, a connecting rod on an electric spark machining head is moved to the upper part of the electrode and is placed in the melted low-melting-point metal material in a downward mode, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or, a low-melting-point metal material is arranged on the upper end face of the electrode in advance, the end part of a connecting rod on the electric spark machining head is abutted against the low-melting-point metal material on the upper end face of the electrode to heat the connecting rod, then the low-melting-point metal material is heated and melted through the heated connecting rod, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or, the end of the connecting rod on the electric spark machining head is abutted against the upper end face of the electrode, then molten low-melting-point metal material is added into the abutted part, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or the end part of the connecting rod on the electric spark machining head is abutted against the upper end face of the electrode to heat the connecting rod, then the low-melting-point metal material is supplied, the low-melting-point metal material is heated and melted by the heated connecting rod to coat the abutted part, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed.
Furthermore, an electric heater is arranged above the positioning jig, corresponds to a connecting rod clamped on a processing head of the electric spark machine, and electrically heats the connecting rod.
As an extension scheme, the upper end face of the electrode is provided with a connecting groove, and a low-melting-point metal material is arranged in the connecting groove.
The electric discharge machine electrode clamping correction system for implementing the method is characterized by comprising a workpiece to be machined, an electrode, a positioning jig and a connecting rod, wherein the workpiece to be machined and the positioning jig are arranged on a workbench of an electric discharge machine, and the positioning jig is positioned on the side of the machined workpiece; the electrode is provided with a reference platform, the reference platform of the electrode comprises a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface, the first vertical reference surface is vertically intersected with the second vertical reference surface, the first horizontal reference surface is intersected with the first vertical reference surface to form a transverse reference edge, the first horizontal reference surface is intersected with the second vertical reference surface to form a longitudinal reference edge, the intersection point of the transverse reference edge and the longitudinal reference edge is the reference point of the electrode reference platform, the positioning jig is provided with a positioning part matched with the reference platform of the electrode, the positioning part comprises a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface, the first vertical positioning surface is vertically intersected with the second vertical positioning surface, the first horizontal positioning surface is intersected with the first vertical positioning surface to form a transverse positioning edge, and the first horizontal positioning surface is intersected with the second vertical positioning surface, forming a longitudinal positioning edge, wherein the intersection point of the transverse positioning edge and the longitudinal positioning edge is a positioning point of the positioning part; the electrode is placed on the positioning jig, and a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface of a reference table of the electrode are respectively matched with a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface of a positioning part of the positioning jig, so that a transverse reference edge and a longitudinal reference edge are respectively superposed with a transverse positioning edge and a longitudinal positioning edge, the reference point of the reference table is superposed with the positioning point of the positioning part, and at the moment, the electrode is in a horizontal alignment state; the connecting rod is clamped to a machining head of an electric spark machine and is connected and fixed with the electrode in a mode of heating, melting and cooling and solidifying the low-melting-point metal material.
Furthermore, an electric heater is arranged above the positioning jig, corresponds to a connecting rod clamped on a processing head of the electric spark machine, and electrically heats the connecting rod.
Further, as an extension scheme, the upper end face of the electrode is provided with a connecting groove, and a low-melting-point metal material is arranged in the connecting groove.
The invention has the following advantages: designing a positioning jig, and matching a positioning part of the positioning jig with a reference platform of the electrode, so that the electrode can be accurately and quickly in a horizontal alignment state, and the coordinate of the center point of the electrode at the moment is determined; the design connecting rod (generally speaking, connecting rod and electrode all are the copper product) to the low melting point metal material of melting point at 60 ℃ -300 ℃ can be under the condition that need not accurate positioning (the connecting rod need not to aim at the center of motor up end promptly, and general staff also can operate, breaks away from the reliance to professional operating personnel), make the connecting rod be connected fixedly with the positioning jig through the mode that heating melting and cooling solidify, and guarantee effectual electric conductivity. The method can clamp and correct the electrode simply, conveniently and quickly, position the central point of the electrode quickly, is efficient and reliable, ensures the quality, saves time and labor, and gets rid of dependence on professional operators; moreover, for a set of a plurality of electrodes, when the electrodes are replaced, time-consuming adjustment and correction of the electrodes by means of a regulating detector are not needed, and the electrodes do not need to be positioned and centered for a plurality of times by means of a standard ball.
The present invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a schematic structural diagram of a workpiece, a positioning fixture and an electrode on a worktable of an electric discharge machine;
FIG. 3 is a schematic view of the positioning fixture and the electrodes;
FIG. 4 is a first schematic view of an electrode structure;
FIG. 5 is a second schematic structural view of an electrode;
FIG. 6 is a third schematic view of the electrode structure;
in the figure: positioning a jig 1; a positioning portion 11; a first horizontal positioning surface 12; a first vertical positioning surface 13; a second vertical positioning surface 14; a transverse positioning edge 15; a longitudinal positioning edge 16; an electrode 2; a reference table 21; a first horizontal reference plane 22; a first vertical reference plane 23; a second vertical reference plane 24; a transverse reference edge 25; a longitudinal reference edge 26; a connecting groove 27; a connecting rod 3; a workpiece 4; an electric spark machine 5; a table 51; the machining head 52; an electric heater 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, 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.
It should be noted that if directional indications (such as … …, which is up, down, left, right, front, back, top, bottom, inner, outer, vertical, transverse, longitudinal, counterclockwise, clockwise, circumferential, radial, axial) are provided in the embodiments of the present invention, the directional indications are only used for explaining the relative position relationship, motion condition, etc. of the components at a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first" or "second", etc. in the embodiments of the present invention, the description of "first" or "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 6, the method for correcting clamping of an electrode of an electric discharge machine provided in this embodiment includes the following steps:
1) arranging a positioning jig 1, wherein the positioning jig 1 is provided with a positioning part 11 matched with a reference platform 21 of an electrode 2, the reference platform 21 of the electrode 2 comprises a first horizontal reference surface 22, a first vertical reference surface 23 and a second vertical reference surface 24, the first vertical reference surface 23 is vertically crossed with the second vertical reference surface 24, the first horizontal reference surface 22 is crossed with the first vertical reference surface 23 to form a transverse reference edge 25, the first horizontal reference surface 22 is crossed with the second vertical reference surface 24 to form a longitudinal reference edge 26, the intersection point of the transverse reference edge 25 and the longitudinal reference edge 26 is the reference point of the electrode reference platform 21, the positioning part 11 comprises a first horizontal positioning surface 12, a first vertical positioning surface 13 and a second vertical positioning surface 14, the first vertical positioning surface 13 is vertically crossed with the second vertical positioning surface 14, the first horizontal positioning surface 12 is crossed with the first vertical positioning surface 13, forming a transverse positioning edge 15, wherein the first horizontal positioning surface 12 is intersected with the second vertical positioning surface 14 to form a longitudinal positioning edge 16, and the intersection point of the transverse positioning edge 15 and the longitudinal positioning edge 16 is a positioning point of the positioning part 11; a low melting point metal material (not shown In the drawing) is provided on the upper end surface of the electrode 2 (see fig. 6, alternatively, a connecting groove 27 may be provided on the upper end surface of the electrode 2, and then a low melting point metal material, which is a Bi, Sn, Pb, or In metal or alloy having a melting point of 60 to 300 ℃, preferably a Sn material, is provided In the connecting groove 27, and the connecting rod 3 is provided. It should be noted that why tin metal material woollen is preferred, because the connection of connecting rod and electrode best needs to satisfy three requirements, firstly the stability of connecting avoids becoming flexible or droing, secondly the electric conductivity of connecting, guarantees fine electrically conductive effect as far as possible, thirdly, can rapid heating melting and cooling solidification, improves the fixed efficiency of connection of connecting rod, and tin metal has satisfied above three point requirements well, is that other materials are incomparable. For example, some quick-drying glues on the market are poor in effect, and although the quick-drying glue can quickly fix the connecting rod and the electrode, the quick-drying glue is poor in conductivity and affects the processing effect. Therefore, although the above description describes that "the upper end surface of the electrode is fixedly connected with the end of the connecting rod through the heating melting and cooling shaping of the low-melting-point metal material", if there is a novel connecting material with good electrical conductivity, the connecting rod and the electrode can be directly connected instead of the "metal melting/solidification" manner, which is also feasible and an equivalent alternative.
2) The workpiece 4 to be machined and the positioning jig 1 are both arranged on a workbench 51 of the electric discharge machine 5, the positioning jig 1 is positioned at the side of the workpiece 4 to be machined, and the coordinates of the positioning point of the positioning part 11 of the positioning jig 1 are predetermined as (X1, Y1); placing the electrode 2 on the positioning jig 1, wherein a first horizontal reference surface 22, a first vertical reference surface 23 and a second vertical reference surface 24 of a reference table 21 of the electrode 2 are respectively matched with a first horizontal positioning surface 12, a first vertical positioning surface 13 and a second vertical positioning surface 14 of a positioning part 11 of the positioning jig 1, so that a transverse reference edge 25 and a longitudinal reference edge 26 are respectively superposed with a transverse positioning edge 15 and a longitudinal positioning edge 16, the reference point of the reference table 21 is superposed with the positioning point of the positioning part 11, and at the moment, the electrode 2 is in a horizontal alignment state; knowing that the length and width of the reference table 21 of the electrode 2 are L and W, the distances from the center point of the electrode 2 to the transverse reference side 25 and the longitudinal reference side 26 are L/2 and W/2, respectively, the coordinates of the center point of the electrode 2 at this time can be calculated and determined to be (X3 and Y3) according to the coordinates (X1 and Y1) of the positioning point of the positioning part 11 of the positioning jig 1; clamping the connecting rod 3 to a machining head 52 of the electric discharge machine 5, connecting and fixing the end part of the connecting rod 3 with the upper end surface of the electrode 2 after heating and melting the low-melting-point metal material, cooling and shaping, and then connecting and fixing the electrode 2, wherein at this time, the electrode 2 is connected and fixed and still keeps a horizontal alignment state, and at this time, the electrode clamping correction is completed (here, the connecting rod is connected and fixed with the electrode, there are four ways described above, which are not described herein again). When a new electrode is replaced, the low-melting-point metal material on the upper end face of the electrode is heated and melted, so that the electrode can be separated from the connecting rod, then the new electrode is placed on the positioning jig and connected again, and therefore the electrode can be replaced conveniently and quickly.
Here, it should be noted that, in general, the reference stage of the electrode is square, the positioning portion of the positioning jig is L-shaped, and has one positioning right angle, and for the calculation of the coordinates: the coordinates of the positioning points of the positioning part of the positioning jig are (X1, Y1) and the central points of the workpiece are (X2, Y2), which are measured in advance, namely the coordinates are measured when the positioning jig and the workpiece to be machined are fixed on the electric discharge machine workbench; the determination can be made by a standard ball or related implement, method. The workpiece to be machined is generally clamped and fixed at the middle position of the workbench, and the positioning jig can be arranged at the left side, the right side, the upper side, the lower side, the left upper side, the left lower side, the right upper side and the right lower side of the workpiece; it may be: x3 ═ X1+ W/2 or X3 ═ X1-W/2, Y3 ═ Y1+ L/2 or Y3 ═ Y1-L/2.
It should be noted here that why the connecting rod can be connected and fixed to any position of the upper end face of the electrode without influence, because the electrode is kept horizontal and guaranteed by the positioning part of the positioning jig and the reference platform of the electrode at the moment, and the central point can be calculated and determined, so the connecting rod only needs to be capable of connecting and fixing the electrode, and whether the connecting rod is horizontally aligned or not or how the position of the connecting rod is not important, so long as the electrode is horizontally aligned and the coordinate of the central point is accurate, the connecting rod can be accurately aligned and superposed with the central point of the workpiece. In the whole process, the process of adjusting and correcting the electrodes by professional operators through the measurer is reduced, and the electrode adjusting and correcting device is efficient, reliable, time-saving and labor-saving and gets rid of dependence on professionals.
Specifically, the subsequent processing operation further comprises the steps of: 3) the center point of the workpiece 4 is determined to be (X2, Y2), the electrode 2 is moved from the coordinates (X3, Y3) to the coordinates (X2, Y2), the center point of the electrode and the center point of the workpiece are aligned and overlapped at the moment, the center point of the workpiece is set to be a workpiece zero point coordinate (0, 0), a relative coordinate system is established, and then the electrode is moved to a position to be machined according to the coordinates of a drawing corresponding to the workpiece, and electric spark machining is carried out. Here, in general, machining by an electric discharge machine is performed by establishing a coordinate system with a center point of a workpiece as a zero point. In addition, the coordinates of the central point of the workpiece and the coordinates of the central point of the electrode placed on the positioning jig are not changed, so that the electrode is determined once, and the subsequent replacement of the electrode is not influenced.
Specifically, in step 2), the end of the connecting rod 3 is heated and melted by the low-melting-point metal material, then cooled and shaped, and then connected and fixed with the upper end face of the electrode 2, specifically including the following four ways: the upper end surface of the electrode 2 is preset with a low-melting-point metal material, the low-melting-point metal material on the upper end surface of the electrode 2 is directly heated and melted, the connecting rod 3 on the processing head 52 of the electric spark machine 5 is moved to the upper part of the electrode 2 and is placed in the melted low-melting-point metal material in a downward way, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode 2 is connected and fixed; or, the upper end surface of the electrode 2 is provided with a low-melting-point metal material in advance, the end part of the connecting rod 3 on the processing head 52 of the electric spark machine 5 is abutted against the low-melting-point metal material on the upper end surface of the electrode 2 to heat the connecting rod 3, then the low-melting-point metal material is heated and melted through the heated connecting rod 3, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode 2 is fixedly connected; or, the end part of the connecting rod 3 on the processing head 52 of the electric spark machine 5 is propped against the upper end surface of the electrode 2, then molten low-melting-point metal material is added into the propped part, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or, the end part of the connecting rod 3 on the processing head 52 of the electric spark machine 5 is abutted against the upper end surface of the electrode 2, the connecting rod 3 is heated, then the low-melting-point metal material is supplied, the low-melting-point metal material is heated and melted by the heated connecting rod 3 to cover the abutted part, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode 2 is connected and fixed. The present embodiment adopts the fourth mode.
Specifically, an electric heater 6 is arranged above the positioning jig 2, and the electric heater 6 corresponds to the connecting rod 3 clamped on the machining head 52 of the electric discharge machine 5 to electrically heat the connecting rod 3.
The electric discharge machine electrode clamping correction system for implementing the method comprises a workpiece 4 to be machined, an electrode 2, a positioning jig 1 and a connecting rod 3, wherein the workpiece 4 to be machined and the positioning jig 1 are both arranged on a workbench 51 of an electric discharge machine 5, and the positioning jig 1 is positioned on the side of the workpiece 4 to be machined; the electrode 2 is provided with a reference platform 21, the reference platform 21 of the electrode 2 comprises a first horizontal reference surface 22, a first vertical reference surface 23 and a second vertical reference surface 24, the first vertical reference surface 23 is vertically intersected with the second vertical reference surface 24, the first horizontal reference surface 22 is intersected with the first vertical reference surface 23 to form a transverse reference edge 25, the first horizontal reference surface 22 is intersected with the second vertical reference surface 24 to form a longitudinal reference edge 26, the intersection point of the transverse reference edge 25 and the longitudinal reference edge 26 is the reference point of the reference platform 21 of the electrode 2, the positioning jig 1 is provided with a positioning part 11 matched with the reference platform 21 of the electrode 2, the positioning part 11 comprises a first horizontal positioning surface 12, a first vertical positioning surface 13 and a second vertical positioning surface 14, the first vertical positioning surface 13 is vertically intersected with the second vertical positioning surface 14, and the first horizontal positioning surface 12 is intersected with the first vertical positioning surface 13, forming a transverse positioning edge 15, wherein the first horizontal positioning surface 12 is intersected with the second vertical positioning surface 14 to form a longitudinal positioning edge 16, and the intersection point of the transverse positioning edge 15 and the longitudinal positioning edge 16 is a positioning point of the positioning part 11; the electrode 2 is placed on the positioning jig 1, and a first horizontal reference surface 22, a first vertical reference surface 23 and a second vertical reference surface 24 of a reference table 21 of the electrode 2 are respectively matched with a first horizontal positioning surface 12, a first vertical positioning surface 13 and a second vertical positioning surface 14 of a positioning part 11 of the positioning jig 1, so that a transverse reference edge 25 and a longitudinal reference edge 26 are respectively superposed with a transverse positioning edge 15 and a longitudinal positioning edge 16, the reference point of the reference table 21 is superposed with the positioning point of the positioning part 11, and at the moment, the electrode 2 is in a horizontal alignment state; the connecting rod 3 is clamped to a processing head 52 of the electric spark machine 5 and is connected and fixed with the electrode 2 in a mode of heating, melting and cooling solidification of the low-melting-point metal material.
Specifically, the low-melting-point metal material is a pure metal or an alloy with a melting point of 60-300 ℃.
Specifically, an electric heater 6 is arranged above the positioning jig 2, and the electric heater 6 corresponds to the connecting rod 3 clamped on the machining head 52 of the electric spark machine 5 to electrically heat the connecting rod.
As an extension, the upper end face of the electrode 2 is provided with a connecting groove 27, and the connecting groove 27 is provided with a low melting point metal material.
The present invention is not limited to the above embodiments, and other methods and systems for correcting clamping of an electrode of an electric discharge machine, which are obtained by using the same or similar technical features as those of the above embodiments of the present invention, are within the scope of the present invention.

Claims (10)

1. The method for correcting the clamping of the electrode of the electric discharge machine is characterized by comprising the following steps of:
1) arranging a positioning jig, wherein the positioning jig is provided with a positioning part matched with a reference platform of an electrode, the reference platform of the electrode comprises a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface, the first vertical reference surface is vertically intersected with the second vertical reference surface, the first horizontal reference surface is intersected with the first vertical reference surface to form a transverse reference edge, the first horizontal reference surface is intersected with the second vertical reference surface to form a longitudinal reference edge, the intersection point of the transverse reference edge and the longitudinal reference edge is the reference point of the reference platform of the electrode, the positioning part comprises a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface, the first vertical positioning surface is vertically intersected with the second vertical positioning surface, the first horizontal positioning surface is intersected with the first vertical positioning surface to form a transverse positioning edge, and the first horizontal positioning surface is intersected with the second vertical positioning surface, forming a longitudinal positioning edge, wherein the intersection point of the transverse positioning edge and the longitudinal positioning edge is a positioning point of the positioning part; arranging a connecting rod;
2) the workpiece to be machined and the positioning jig are arranged on a workbench of the electric discharge machine, the positioning jig is positioned on the side of the workpiece to be machined, and the coordinates of the positioning point of the positioning part of the positioning jig are determined to be (X1, Y1); placing the electrode on a positioning jig, wherein a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface of a reference table of the electrode are respectively matched with a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface of a positioning part of the positioning jig, so that a transverse reference edge and a longitudinal reference edge are respectively superposed with a transverse positioning edge and a longitudinal positioning edge, the reference point of the reference table is superposed with the positioning point of the positioning part, and at the moment, the electrode is in a horizontal alignment state; knowing that the length of the reference platform of the electrode is L and the width of the reference platform of the electrode is W, the distances from the center point of the electrode to the transverse reference side and the longitudinal reference side are L/2 and W/2 respectively, and then calculating and determining the coordinates of the center point of the electrode at the moment as (X3 and Y3) according to the coordinates (X1 and Y1) of the positioning point of the positioning part of the positioning jig; clamping the connecting rod to a machining head of an electric spark machine, connecting and fixing the end part of the connecting rod with the upper end face of the electrode after the connecting rod is heated, melted and shaped through low-melting-point metal materials, and at the moment, the electrode is fixedly connected and still keeps a horizontal alignment state, so that the electrode clamping correction is completed.
2. The method for correcting the clamping of the electrode of the electric discharge machine according to claim 1, further comprising the steps of: 3) the center point of the workpiece is determined to be (X2, Y2), the electrode is moved from the coordinates (X3, Y3) to the coordinates (X2, Y2), the center point of the electrode is aligned and superposed with the center point of the workpiece, the center point of the workpiece is set to be the zero point coordinate (0, 0), a relative coordinate system is established, and then the electrode is moved to the position needing to be machined according to the coordinates of the drawing corresponding to the workpiece, and electric spark machining is carried out.
3. The method for correcting the clamping of the electrode of the electric discharge machine according to claim 1, wherein in the step 1), the low-melting-point metal material is a pure metal or an alloy with a melting point of 60-300 ℃.
4. The method for correcting clamping of the electrode of the electric discharge machine according to claim 3, wherein the low-melting-point metal material is Sn metal material or Sn alloy material.
5. The method for correcting the clamping of the electrode of the electric discharge machine according to claim 1, wherein in the step 2), the end part of the connecting rod is connected and fixed with the upper end surface of the electrode after being heated and melted by a low-melting-point metal material, cooled and shaped, and specifically comprises the following four modes: the upper end surface of the electrode is preset with a low-melting-point metal material, the low-melting-point metal material on the upper end surface of the electrode is directly heated and melted, a connecting rod on an electric spark machining head is moved to the upper part of the electrode and is placed in the melted low-melting-point metal material in a downward mode, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or, a low-melting-point metal material is arranged on the upper end face of the electrode in advance, the end part of a connecting rod on the electric spark machining head is abutted against the low-melting-point metal material on the upper end face of the electrode to heat the connecting rod, then the low-melting-point metal material is heated and melted through the heated connecting rod, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or, the end of the connecting rod on the electric spark machining head is abutted against the upper end face of the electrode, then molten low-melting-point metal material is added into the abutted part, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed; or the end part of the connecting rod on the electric spark machining head is abutted against the upper end face of the electrode to heat the connecting rod, then the low-melting-point metal material is supplied, the low-melting-point metal material is heated and melted by the heated connecting rod to coat the abutted part, and after the low-melting-point metal material is cooled, solidified and shaped, the electrode is connected and fixed.
6. The method for correcting the clamping of the electrode of the electric discharge machine according to claim 5, wherein an electric heater is arranged above the positioning jig, and the electric heater corresponds to a connecting rod clamped on a processing head of the electric discharge machine and electrically heats the connecting rod.
7. The method for correcting the clamping of the electrode of the electric discharge machine according to claim 5, wherein the upper end surface of the electrode is provided with a connecting groove, and a low-melting-point metal material is arranged in the connecting groove.
8. An electric discharge machine electrode clamping correction system for implementing the method of any one of claims 1 to 7, which is characterized by comprising a workpiece to be machined, an electrode, a positioning jig and a connecting rod, wherein the workpiece to be machined and the positioning jig are arranged on a workbench of the electric discharge machine, and the positioning jig is positioned at the side of the workpiece to be machined; the electrode is provided with a reference platform, the reference platform of the electrode comprises a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface, the first vertical reference surface is vertically intersected with the second vertical reference surface, the first horizontal reference surface is intersected with the first vertical reference surface to form a transverse reference edge, the first horizontal reference surface is intersected with the second vertical reference surface to form a longitudinal reference edge, the intersection point of the transverse reference edge and the longitudinal reference edge is the reference point of the electrode reference platform, the positioning jig is provided with a positioning part matched with the reference platform of the electrode, the positioning part comprises a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface, the first vertical positioning surface is vertically intersected with the second vertical positioning surface, the first horizontal positioning surface is intersected with the first vertical positioning surface to form a transverse positioning edge, and the first horizontal positioning surface is intersected with the second vertical positioning surface, forming a longitudinal positioning edge, wherein the intersection point of the transverse positioning edge and the longitudinal positioning edge is a positioning point of the positioning part; the electrode is placed on the positioning jig, and a first horizontal reference surface, a first vertical reference surface and a second vertical reference surface of a reference table of the electrode are respectively matched with a first horizontal positioning surface, a first vertical positioning surface and a second vertical positioning surface of a positioning part of the positioning jig, so that a transverse reference edge and a longitudinal reference edge are respectively superposed with a transverse positioning edge and a longitudinal positioning edge, the reference point of the reference table is superposed with the positioning point of the positioning part, and at the moment, the electrode is in a horizontal alignment state; the connecting rod is clamped to a machining head of an electric spark machine and is connected and fixed with the electrode in a mode of heating, melting and cooling and solidifying the low-melting-point metal material.
9. The system for clamping and correcting the electrode of the electric discharge machine according to claim 1, wherein an electric heater is arranged above the positioning jig, and the electric heater corresponds to a connecting rod clamped on a processing head of the electric discharge machine and is used for electrically heating the connecting rod.
10. The system for clamping and correcting the electrode of the electric discharge machine according to claim 1, wherein the upper end surface of the electrode is provided with a connecting groove, and the connecting groove is internally provided with a low-melting-point metal material.
CN201911227052.1A 2019-12-04 2019-12-04 Electric discharge machine electrode clamping correction method and system Pending CN110756931A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111715953A (en) * 2020-06-30 2020-09-29 东莞市迪蒙数控机械有限公司 Automatic electrode replacement machining method for electric discharge machine based on electrode clamping correction
CN112872512A (en) * 2020-12-24 2021-06-01 四川科思精密模具有限公司 One-time machining size in-place method for discharge forming machining

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111715953A (en) * 2020-06-30 2020-09-29 东莞市迪蒙数控机械有限公司 Automatic electrode replacement machining method for electric discharge machine based on electrode clamping correction
CN111715953B (en) * 2020-06-30 2021-05-28 东莞市迪蒙数控机械有限公司 Automatic electrode replacement machining method for electric discharge machine based on electrode clamping correction
CN112872512A (en) * 2020-12-24 2021-06-01 四川科思精密模具有限公司 One-time machining size in-place method for discharge forming machining

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