A machining fixture for EDM machining that can be used to expand the stroke

Abstract

The present invention belongs to the technical field of machining fixture equipment, and provides an electrospark forming machine machining fixture that can be used to expand the stroke, mainly including a conductive connecting rod, a clamping assembly and an electrode clamping piece; the conductive connecting rod is installed in the main shaft clamping position of the electrospark forming machine and is electrically conductive; the clamping assembly includes a first clamping piece, a second clamping piece and a screwing piece, the first clamping piece is provided with a first clamping cavity and a connecting part; the second clamping piece is provided with a through hole and a second clamping cavity, the connecting part can pass through the through hole and be threadedly connected to the screwing piece; the electrode clamping piece includes a clamping part and a mounting part, the mounting part can be extended into the first clamping cavity or the second clamping cavity, and the clamping part is provided with a machining electrode. The present invention can make full use of the available space in the equipment machining cavity on the premise of ensuring the safe operation of the spindle, and improve the production and economic benefits of the enterprise.

Description

Technical Field

[0001] The invention belongs to the technical field of machining fixture equipment, and in particular relates to an electrospark forming machine machining fixture which can be used to expand the stroke. Background Art

[0002] At present, some EDM machines used in daily processing and production, such as the SE series of a certain manufacturer, are generally reserved with a larger protective stroke because the stroke protection of the spindle during processing must be considered when designing the machine tool to avoid accidental collisions. This makes the stroke space of the spindle during processing much smaller than the actual space of the mold processing cavity. Therefore, when facing a mold whose design size is slightly larger than the spindle stroke space, the equipment cannot be used for processing. At this time, there are generally two solutions:

[0003] The first method is to purchase equipment with a larger processing space; however, this method requires increased capital investment, and the purchased equipment will occupy production space and also require corresponding operators, which will greatly increase the company's production costs.

[0004] The second method is to entrust other companies to do the processing on your behalf; however, this method will incur more outsourcing processing fees, which will also greatly increase the company's production costs. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an EDM machining fixture that can be used to expand the stroke, which can fully utilize the available space in the equipment machining cavity while ensuring the safe operation of the spindle, thereby improving the production economic benefits of the enterprise.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A machining fixture for an electric spark forming machine that can be used to expand the stroke, comprising a plurality of conductive connecting rods and a clamping assembly for clamping and fixing two adjacent conductive connecting rods;

[0008] One end of the conductive connecting rod is installed in the main shaft clamping position of the EDM machine and is electrically conductive;

[0009] The clamping assembly includes a first clamping member, a second clamping member and a screwing member. The first clamping member and the second clamping member can be electrically conductive. The first clamping member is provided with a first clamping cavity with a variable clamping space for the conductive connecting rod to pass through, and a connecting portion arranged away from the first clamping cavity; the second clamping member is provided with a through hole for the first clamping member to pass through, and a second clamping cavity with a variable clamping space for the conductive connecting rod to pass through. After passing through the through hole, the connecting portion is threadedly connected to the screwing member and promotes the change of the clamping space of the first clamping cavity and the second clamping cavity.

[0010] Preferably, the first clamping member includes an outer sleeve and an inner column member, the inner column member is inserted into the outer sleeve, and through holes are coaxially provided on the outer sleeve and the inner column member, and the first clamping cavity is formed between the through holes on the outer sleeve and the inner column member.

[0011] Preferably, the outer sleeve comprises a first ring segment and a second ring segment which are coaxially arranged, the outer diameter of the first ring segment is smaller than the outer diameter of the second ring segment, and the outer diameter of the first ring segment is adapted to the diameter width of the through hole, and the outer diameter of the second ring segment is larger than the diameter width of the through hole;

[0012] The through hole on the outer sleeve is arranged on the second ring segment.

[0013] Preferably, the inner column member comprises a columnar body, and the connecting portion is coaxially arranged at the end of the columnar body.

[0014] Preferably, the second clamping cavity is provided on the second clamping member in a hole-shaped structure, the through hole is transversely provided on one opposite side of the second clamping member, the second clamping cavity is transversely provided on the other opposite side of the second clamping member, and the axis of the through hole and the axis of the second clamping cavity are intersected with each other;

[0015] A clamping gap is provided on the second clamping member in the middle of the through hole, which crosses and cuts through the through hole. The clamping gap is communicated with the side surface of the second clamping member and the side wall of the second clamping cavity.

[0016] Preferably, an anti-slip structure is provided on the screwing member.

[0017] Preferably, it further comprises an electrode clamping member, which comprises an electrically conductive clamping portion and a mounting portion, wherein the mounting portion is detachably inserted into the first clamping cavity or the second clamping cavity, and a machining electrode is arranged on the clamping portion.

[0018] Preferably, the clamping portion comprises an annular body, a locking member is provided on the side wall of the annular body, and a threaded through hole is transversely provided on the side wall of the annular body, and the locking member is threadedly connected to the threaded through hole.

[0019] Preferably, a V-shaped groove for mounting a machining electrode is provided on the inner wall of the annular body, and the locking member is provided on the annular body opposite to the V-shaped groove.

[0020] Preferably, the number of the conductive connecting rods corresponds to the number of the clamping assemblies.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In this scheme, a processing fixture for expanding the processing stroke of the EDM forming machine is cleverly provided, including several conductive connecting rods and clamping components. The adjacent conductive connecting rods are clamped and fixed by the clamping components to achieve electrical conduction. One of the conductive connecting rods is set in the main shaft clamping position, and the other conductive connecting rods are installed, fixed and extended by the clamping components. The processing electrode is clamped and fixed by the clamping components and electrically conductive like the conductive connecting rods to ensure the normal operation of the electrode. The conductive connecting rods can be used to extend and expand the processing stroke of the main shaft, effectively make full use of the available space in the processing cavity of the equipment, and process larger-sized molds; the conductive connecting rods do not change the actual operating stroke of the main shaft. By adjusting the connection status of each conductive connecting rod, the processing of the side holes of the mold and the upward hole structure at the bottom of the mold can also be achieved in the same process, which can effectively reduce the clamping time of the mold to be processed, greatly reduce the cost of the enterprise, and improve the processing efficiency, with higher economic benefits; and the structure of the entire processing fixture is relatively simple, easy to operate, and easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the clamping assembly of the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the present invention when it is installed and used.

[0027] Figure 4 It is a schematic diagram of the side structure of the electrode clamp of the present invention.

[0028] in:

[0029] 1-conductive connecting rod, 11-first conductive connecting rod, 12-second conductive connecting rod, 13-third conductive connecting rod; 2-clamping assembly, 21-first clamping member, 211-connecting portion, 212-outer sleeve, 2121-first ring segment, 2122-second ring segment, 213-inner column member, 214-through hole, 22-second clamping member, 221-through hole, 222-second clamping cavity, 223-clamping gap, 23-screwing member, 231-anti-slip structure; 3-electrode clamping member, 31-clamping portion, 311-locking member, 312-V-shaped groove, 32-installing portion; 4-spindle, 5-machining electrode. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] Example 1

[0033] like Figure 1-3 As shown, in this embodiment, a processing fixture for an EDM forming machine that can be used to expand the stroke is provided, which mainly includes a plurality of conductive connecting rods 1, a clamping assembly 2 for clamping and fixing two adjacent conductive connecting rods 1, and an electrode clamp 3. The number of the conductive connecting rods 1 corresponds to the number of the clamping assembly 2. In this embodiment, three conductive connecting rods 1 are provided for example to achieve extension in the three directions of X, Y, and Z, including a first conductive connecting rod 11, a second conductive connecting rod 12, and a third conductive connecting rod 13. In the actual application process, the operator can select the number of the conductive connecting rods 1 and the clamping assembly 2 according to actual needs.

[0034] Specifically, one end of the first conductive link 11 is installed at the clamping position of the spindle 4 of the EDM machine to achieve electrical conduction with the spindle 4 of the EDM machine; the other end of the first conductive link 11, the second conductive link 12 and the third conductive link 13 are connected end to end in sequence through the clamping assembly 2. The electrode clamp 3 is fixedly arranged at the end of the third conductive link 13 through the clamping assembly 2, and the machining electrode 5 is installed on the electrode clamp 3, so as to achieve the extended application of the machining electrode 5 on the spindle 4 to obtain a larger machining stroke or machining range.

[0035] The clamping assembly 2 includes a first clamping member 21, a second clamping member 22 and a screwing member 23. The first clamping member 21 and the second clamping member 22 can both be electrically conductive. In actual application, the conductive connecting rod 1, the first clamping member 21 and the second clamping member 22 can all be made of metal to achieve overall electrical conductivity.

[0036] Furthermore, the first clamping member 21 is provided with a first clamping cavity with a variable clamping space for the conductive connecting rod 1 to pass through, and the first clamping member 21 is provided with a connecting portion 211 away from the first clamping cavity; the second clamping member 22 is provided with a through hole 221 for the first clamping member 21 to pass through, and a second clamping cavity 222 with a variable clamping space for the conductive connecting rod 1 to pass through, and the connecting portion 211 is threadedly connected to the screwing member 23 after passing through the through hole 221 and promotes the change of the clamping space of the first clamping cavity and the second clamping cavity 222.

[0037] As a preferred solution, in this embodiment, the first clamping member 21 also includes an outer sleeve 212 and an inner column member 213, the inner column member 213 is inserted into the outer sleeve 212, and the outer sleeve 212 and the inner column member 213 are coaxially provided with a through hole 214 for the conductive connecting rod 1 to pass through, and the first clamping cavity is formed between the through hole 214 on the outer sleeve 212 and the inner column member 213, and when relative sliding occurs between the inner column member 213 and the outer sleeve 212, the through hole 214 between the two will have an axial separation to realize the changeability of the clamping space, thereby realizing the tight clamping of the conductive connecting rod 1 inserted therein.

[0038] Further, the outer sleeve 212 includes a first ring segment 2121 and a second ring segment 2122 which are coaxially arranged. The outer diameter of the first ring segment 2121 is smaller than the outer diameter of the second ring segment 2122 to form a step structure, and the length of the first ring segment 2121 is smaller than the overall length of the through hole 221. The outer diameter of the first ring segment 2121 is adapted to the diameter width of the through hole 221, so that the first ring segment 2121 can be inserted or extended into the through hole 221. The outer diameter of the second ring segment 2122 is larger than the diameter width of the through hole 221, that is, the step structure formed between the first ring segment 2121 and the second ring segment 2122 can form a mutual abutment with the outer side of the through hole 221, so as to facilitate the control of the clamping state of the second clamping cavity 222 when the screwing member 23 is connected to the connecting portion 211. The through hole 214 on the outer sleeve 212 is arranged on the second ring segment 2122.

[0039] In addition, the inner column member 213 includes a columnar body, and the connecting portion 211 is coaxially arranged at the end of the columnar body; in this embodiment, the length of the columnar body should be smaller than the length of the inner cavity of the outer sleeve 212, and the connecting portion 211 is a portion extending out of the inner cavity of the outer sleeve 212, so that when the connecting portion 211 is screwed with the screw member 23, the relative position between the inner column member 213 and the outer sleeve 212 can be changed, thereby realizing the control of the clamping state of the first clamping cavity.

[0040] The second clamping cavity 222 is provided in a hole-like structure on the second clamping member 22, the through hole 221 is transversely provided on one opposite side of the second clamping member 22, the second clamping cavity 222 is transversely provided on the other opposite side of the second clamping member 22, and the axis of the through hole 221 and the axis of the second clamping cavity 222 are mutually staggered. A clamping gap 223 is provided on the second clamping member 22 in the middle of the through hole 221, which transversely cuts through the through hole 221, and the clamping gap 223 is connected with the side of the second clamping member 22 and the side wall of the second clamping cavity 222. When the first ring segment 2121 extends into the through hole 221, the clamping gap 223 can be compressed by adjusting the screwing state of the connecting portion 211 and the screwing portion 23, thereby realizing the clamping control of the second clamping cavity 222. The operation is simple and convenient. The clamping control of the first clamping cavity and the second clamping cavity 222 can be realized simultaneously through one screwing member 23. The design is ingenious and the linkage is strong.

[0041] The screwing member 23 is also provided with an anti-slip structure 231 to facilitate the screwing operation of the operator.

[0042] As a preferred solution, the electrode clamping member 3 is also made of metal, and includes an electrically conductive clamping portion 31 and a mounting portion 32. The mounting portion 32 can be detachably extended into the first clamping cavity or the second clamping cavity 222, and a processing electrode 5 is arranged on the clamping portion 31.

[0043] Specifically, the structure of the mounting portion 32 in this embodiment can be set to be consistent with the conductive connecting rod 1, so as to facilitate the use of the first clamping cavity and the second clamping cavity 222. The clamping portion 31 includes an annular body, and the mounting portion 32 is welded to the annular body; a locking member 311 and a threaded through hole transversely arranged on the side wall of the annular body are arranged on the side wall of the annular body, and the locking member 311 is threadedly arranged in the threaded through hole. As a preferred solution, the mounting portion 32 and the locking member 311 are arranged in the same plane, so that the existence of the locking member 311 will not further affect the stroke of the processing electrode 5. At this time, the debugging of the equipment only needs to consider the position of the mounting portion 32.

[0044] Furthermore, a V-shaped groove 312 for installing the processing electrode 5 is provided on the inner wall of the annular body to ensure the installation accuracy of the processing electrode 5; the locking piece 311 is provided on the annular body opposite to the V-shaped groove 312, and the processing electrode 5 can be clamped by screwing the locking piece 311, which is simple and convenient to operate.

[0045] The specific structural form of the EDM machine described in this embodiment can be referred to in the prior art, such as the SE4 EDM machine produced by AgieCharmilles, and will not be described in detail here.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A machining fixture for an EDM machine that can be used to expand the stroke, characterized in that: It comprises a plurality of conductive connecting rods and a clamping assembly for clamping and fixing two adjacent conductive connecting rods; One end of the conductive connecting rod is installed in the main shaft clamping position of the EDM machine and is electrically conductive; The clamping assembly includes a first clamping member, a second clamping member and a screwing member, the first clamping member and the second clamping member are electrically conductive, the first clamping member is provided with a first clamping cavity with a variable clamping space for the conductive connecting rod to pass through, and a connecting portion arranged away from the first clamping cavity; the second clamping member is provided with a through hole for the first clamping member to pass through, and a second clamping cavity with a variable clamping space for the conductive connecting rod to pass through, the connecting portion is threadedly connected to the screwing member after passing through the through hole and promotes the change of the clamping space of the first clamping cavity and the second clamping cavity; The conductive connecting rod, the first clamping member and the second clamping member are all made of metal.

2. The EDM machining fixture for expanding the stroke according to claim 1, characterized in that: The first clamping member includes an outer sleeve and an inner column member, the inner column member is inserted into the outer sleeve, and through holes are coaxially provided on the outer sleeve and the inner column member, and the first clamping cavity is formed between the through holes on the outer sleeve and the inner column member.

3. The EDM machining fixture for expanding the stroke according to claim 2, characterized in that: The outer sleeve includes a first ring segment and a second ring segment coaxially arranged, the outer diameter of the first ring segment is smaller than the outer diameter of the second ring segment, and the outer diameter of the first ring segment is adapted to the diameter width of the through hole, and the outer diameter of the second ring segment is larger than the diameter width of the through hole; The through hole on the outer sleeve is arranged on the second ring segment.

4. The EDM machining fixture for expanding the stroke according to claim 3, characterized in that: The inner column member includes a columnar body, and the connecting portion is coaxially arranged at an end of the columnar body.

5. A machining fixture for an EDM machine that can be used to expand the stroke according to any one of claims 1 to 4, characterized in that: The second clamping cavity is provided on the second clamping member in a hole-shaped structure, the through hole is transversely provided on one opposite side of the second clamping member, the second clamping cavity is transversely provided on the other opposite side of the second clamping member, and the axis of the through hole and the axis of the second clamping cavity are intersected with each other; A clamping gap is provided on the second clamping member in the middle of the through hole, which crosses and cuts through the through hole. The clamping gap is communicated with the side surface of the second clamping member and the side wall of the second clamping cavity.

6. The EDM machining fixture for expanding the stroke according to claim 5, characterized in that: The screwing member is provided with an anti-slip structure.

7. A machining fixture for an EDM machine that can be used to expand the stroke according to claim 1 or 6, characterized in that: It also includes an electrode clamping piece, which includes an electrically conductive clamping portion and a mounting portion, the mounting portion is detachably inserted into the first clamping cavity or the second clamping cavity, and a processing electrode is arranged on the clamping portion.

8. The EDM machining fixture for expanding the stroke according to claim 7, characterized in that: The clamping part comprises an annular body, a locking piece and a threaded through hole which is arranged on the side wall of the annular body and crosses the side wall of the annular body, and the locking piece is threadedly connected with the threaded through hole.

9. The EDM machining fixture for expanding the stroke according to claim 8, characterized in that: A V-shaped groove for mounting a machining electrode is arranged on the inner wall of the annular body, and the locking member is arranged on the annular body facing the V-shaped groove.

10. A machining fixture for an EDM machine that can be used to expand the stroke according to claim 1 or 9, characterized in that: The number of the conductive connecting rods corresponds to the number of the clamping assemblies.

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