Graphite electrode machining clamp

Abstract

The utility model discloses a graphite electrode machining clamp. Comprising a base, a positioning column mounting hole, a cylindrical positioning handle, an electrode positioning seat and a positioning groove, wherein the positioning column mounting hole is formed in the base; the cylindrical positioning handle is mounted in the positioning column mounting hole; the electrode positioning seat is arranged at the upper end part of the cylindrical positioning handle; the bidirectional synchronous clamping device is used for automatically centering and clamping the graphite electrode; the two-way synchronous clamping device comprises a pair of through holes formed in the two side walls of the positioning groove of the electrode positioning base respectively, a pair of jacking columns arranged on the pair of through holes in a sliding mode, and a finger air cylinder arranged on the base and located on one side of the electrode positioning base. The push plates are rotationally connected to the pair of clamping fingers of the finger air cylinder through hinge shafts respectively; and when the pair of clamping fingers of the finger air cylinder are oppositely clamped, the push plates are propped against the outer side end surfaces of the pair of propping columns. According to the utility model, the production efficiency of graphite electrode processing is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fixture, concretely relates to a graphite electrode processing fixture. BACKGROUND

[0002] In the manufacturing process of injection mold, the processing of the injection mold cavity surface is involved. Due to the particularity of the shape of the injection mold cavity surface, the graphite electrode is usually used for electrical discharge machining of the injection mold cavity surface. In order to ensure the machining accuracy of the injection mold cavity surface, the graphite electrode needs to be pre-processed into a special shape. Therefore, the graphite electrode needs to be processed on a numerical control machining machine.

[0003] However, for large injection molds, there are many types and specifications of molds, and the cavity area of the injection mold is large. Therefore, a large amount of graphite electrode is often consumed when processing the injection mold cavity surface. In the prior art, the graphite electrode is usually clamped by conventional clamping methods such as pressing plate pressing and vice clamping. However, these conventional clamping methods have low efficiency and poor positioning accuracy, which results in a long clamping and positioning time when machining on an electrical discharge machining machine. Therefore, the production efficiency of the graphite electrode machining is greatly reduced. SUMMARY

[0004] In order to solve the above problems, the utility model provides a graphite electrode processing fixture, which aims to improve the production efficiency of graphite electrode processing. The specific technical scheme is as follows:

[0005] A graphite electrode processing fixture, comprising a base, a positioning column mounting hole arranged on the base, and a graphite electrode clamping and positioning module mounted on the positioning column mounting hole. The graphite electrode clamping and positioning module comprises a cylindrical positioning handle mounted in the positioning column mounting hole, an electrode positioning seat arranged on the upper end of the cylindrical positioning handle, a positioning groove for positioning the graphite electrode arranged on the electrode positioning seat, and a bidirectional synchronous clamping device for automatically centering and clamping the graphite electrode. The bidirectional synchronous clamping device comprises a pair of through holes arranged on the two side walls of the positioning groove of the electrode positioning seat, a pair of top columns arranged on the pair of through holes for pressing against the graphite electrode, a finger air cylinder arranged on the base and located on one side of the electrode positioning seat, and a pair of clamping fingers rotatably connected to the push plate of the finger air cylinder through a hinge shaft. When the pair of clamping fingers of the finger air cylinder are clamped towards each other, the push plate is pressed against the outer side surface of the pair of top columns.

[0006] Preferably, a rectangular flange is arranged on the outer circular upper end of the cylindrical positioning handle, and the rectangular flange is fixed on the base by a bolt.

[0007] Preferably, the hinge shaft is located on the centerline of symmetry of the pair of top columns.

[0008] In order to further improve the reliability of clamping, the electrode positioning seat is further provided with a jacking screw for locking the top post.

[0009] In the utility model, the finger cylinder is fixed on the base through height cushion block cushioning.

[0010] Preferably, the jacking screw is arranged on the two side end faces of the electrode positioning seat along the direction of the positioning groove.

[0011] In the utility model, the base is provided with a plurality of positioning column mounting holes through display arrangement mode, and each positioning column mounting hole is matched with the graphite electrode clamping positioning module.

[0012] As a further improvement of the utility model, one end of the top post is provided with a sliding block, the push plate is provided with a sliding groove in the direction parallel to the positioning groove, and the sliding block is slidingly arranged in the sliding groove.

[0013] Preferably, the sliding groove is a T-shaped sliding groove.

[0014] In the utility model, a circumferential positioning key is arranged between the rectangular flange and the electrode positioning seat.

[0015] Preferably, the rectangular flange is provided with a dismounting screw for dismounting the cylindrical positioning handle.

[0016] The use method of the utility model is as follows:

[0017] The graphite electrode machining clamp is clamped and fixed on the workbench of the numerical control machine tool, then the graphite electrode to be machined is placed in the positioning groove of the electrode positioning seat of the graphite electrode clamping positioning module, the graphite electrode is centered and clamped by driving the finger cylinder, and the top post for fixing the graphite electrode is locked by using the jacking screw; the numerical control machine tool is started to perform automatic machining of the graphite electrode.

[0018] The utility model has the advantages of:

[0019] First, the graphite electrode machining clamp of the utility model is provided with a bidirectional synchronous clamping device on the electrode positioning seat, the synchronous action of a pair of clamping fingers on the finger cylinder realizes rapid centering and clamping of the graphite electrode, the graphite electrode is clamped and positioned on the positioning groove symmetric axis of the electrode positioning seat, and therefore the efficiency of graphite electrode clamping is improved.

[0020] Second, the graphite electrode machining clamp of the utility model is provided with a jacking screw on the electrode positioning seat, the top post can be locked and fixed, and therefore the reliability of graphite electrode clamping is improved.

[0021] Third, the utility model discloses a graphite electrode processing fixture, and the clamping finger on the finger cylinder is rotatably connected with the push plate through a hinge shaft, and the sliding block and the sliding groove of the push plate are slidably connected, so that the over-positioning assembly caused by manufacturing errors and assembly errors can be effectively eliminated, and the reliability of graphite electrode clamping operation is improved.

[0022] Fourth, the utility model discloses a graphite electrode processing fixture, and the electrode positioning seat is arranged on the cylindrical positioning handle, so that the electrode positioning seat of different specifications can be quickly replaced, and the adaptability is good.

[0023] Fifth, the utility model discloses a graphite electrode processing fixture, and the graphite electrode clamping and positioning module is arranged on the base in an array arrangement mode, so that multiple graphite electrodes of the same or different specifications can be clamped at one time, the center coordinate position of each graphite electrode clamping and positioning module is determined by the positioning column mounting hole on the base, and the numerical control machine tool can continuously process multiple graphite electrodes at one time. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view (top view) of the graphite electrode processing fixture of the utility model;

[0025] Figure 2 It is Figure 1 the structure schematic view (enlarged view) of the graphite electrode clamping and positioning module in

[0026] Figure 3 It is Figure 2 the A-A direction sectional view of

[0027] In the drawing: 1, base, 2, positioning column mounting hole, 3, graphite electrode clamping and positioning module, 4, cylindrical positioning handle, 5, electrode positioning seat, 6, positioning groove, 7, two-way synchronous clamping device, 8, jacking column, 9, finger cylinder, 10, hinge shaft, 11, clamping finger, 12, push plate, 13, rectangular flange, 14, jacking screw, 15, sliding block, 16, sliding groove, 17, circumferential positioning key, 18, dismounting screw, 19, graphite electrode, 20, bolt. DETAILED DESCRIPTION

[0028] The specific implementation of the utility model will be further described below in combination with the drawings and examples. The following examples are only used for more clearly explaining the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0029] As Figures 1 to 3The utility model discloses a graphite electrode processing fixture's embodiment shows, including base 1, set up on the positioning column mounting hole 2 of base 1, install the graphite electrode clamping positioning module 3 on positioning column mounting hole 2, graphite electrode clamping positioning module 3 includes the cylindrical locating handle 4 of installing in positioning column mounting hole 2, set up the electrode locating seat 5 of cylindrical locating handle 4 upper end part, open the positioning groove 6 for positioning graphite electrode 19 on electrode locating seat 5, the two-way synchronous clamping device 7 for automatic centering clamping graphite electrode 19, two-way synchronous clamping device 7 includes respectively set up on the positioning groove 6 both sides wall of electrode locating seat 5 a pair of through -hole, the pair of top post 8 for toping graphite electrode 19 and slidingly setting on a pair of through -hole, set up on base 1 and located the side position of electrode locating seat 5 finger air cylinder 9, respectively through the hinge shaft 10 rotation connection on a pair of finger 11 of finger air cylinder 9 push plate 12, when a pair of finger 11 of finger air cylinder 9 is towards clamping, its push plate 12 top pressure on the outside end face of a pair of top post 8.

[0030] Preferably, the outer circle of the cylindrical locating handle 4 is provided with a rectangular flange 13, and the rectangular flange 13 is tightly fixed on the base 1 by bolts 20.

[0031] Preferably, the hinge shaft 10 is located on the symmetry center line of the pair of top posts 8.

[0032] In order to further improve the reliability of clamping, the electrode locating seat 5 is further provided with a tightening screw 14 for locking the top post 8.

[0033] In this embodiment, the finger air cylinder 9 is fixed on the base 1 after being raised by a height pad (not shown in the figure).

[0034] Preferably, the tightening screw 14 is arranged on the two side end faces of the electrode locating seat 5 along the direction of the positioning groove 6.

[0035] In this embodiment, a plurality of positioning column mounting holes 2 are arranged on the base 1 by a display arrangement, and each positioning column mounting hole 2 is respectively provided with the graphite electrode clamping positioning module 3.

[0036] As a further improvement of this embodiment, the outer side of the top post 8 is provided with a sliding block 15, the push plate 12 is provided with a sliding groove 16 in the direction parallel to the positioning groove 6, and the sliding block 15 is slidingly arranged in the sliding groove 16.

[0037] Preferably, the sliding groove 16 is a T-shaped sliding groove.

[0038] In the embodiment, the circumferential positioning key 17 is arranged between the rectangular flange 13 and the electrode positioning seat 5.

[0039] Preferably, the rectangular flange 13 is provided with a dismounting screw 18 for dismounting the cylindrical positioning handle 4.

[0040] The use method of the embodiment is as follows:

[0041] The graphite electrode processing clamp is clamped to the worktable of the numerical control machine tool for fixation, then the graphite electrode 19 to be processed is placed into the positioning groove 6 of the electrode positioning seat 5 of the graphite electrode clamping positioning module 3, the graphite electrode 19 is centered and clamped by driving the finger cylinder, and the top column 8 for fixing the graphite electrode 19 is locked by using the jacking screw 14; the numerical control machine tool is started to process the graphite electrode 19 automatically.

[0042] The above is only the preferred embodiment of the present application, and it should be pointed out that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A graphite electrode processing jig characterized by, The graphite electrode clamping positioning module comprises a cylindrical positioning handle installed in the positioning column installation hole, an electrode positioning seat arranged at the upper end of the cylindrical positioning handle, a positioning groove for positioning the graphite electrode opened on the electrode positioning seat, and a bidirectional synchronous clamping device for automatically centering and clamping the graphite electrode.

2. A graphite electrode processing clamp according to claim 1, wherein The outer circle upper end of the cylindrical positioning handle is provided with a rectangular flange which is fixed on the base by bolt pressing.

3. The graphite electrode processing clamp of claim 1, wherein The hinge shaft is located on the center line of symmetry of the pair of top columns.

4. The graphite electrode processing clamp of claim 1, wherein The electrode positioning seat is also provided with a tightening screw for locking the top column.

5. A graphite electrode processing clamp according to claim 4, wherein The tightening screw is arranged on the two side end faces of the electrode positioning seat along the direction of the positioning groove.

6. A graphite electrode processing clamp according to claim 1, wherein The base is provided with a plurality of positioning column installation holes arranged by display arrangement, and each positioning column installation hole is respectively provided with the graphite electrode clamping positioning module.

7. A graphite electrode processing clamp according to claim 1, wherein The outer side of the top column is provided with a sliding block, and the push plate is provided with a sliding groove in the direction parallel to the positioning groove.

8. A graphite electrode processing clamp according to claim 7, wherein The sliding groove is a T-shaped sliding groove.

9. A graphite electrode processing clamp according to claim 2, wherein A circumferential positioning key is arranged between the rectangular flange and the electrode positioning seat.

10. The graphite electrode processing clamp of claim 2, wherein, The rectangular flange is provided with a dismounting screw for dismounting the cylindrical positioning handle.

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