CN115213504A

CN115213504A - Electrode clamp assembly

Info

Publication number: CN115213504A
Application number: CN202210980407.XA
Authority: CN
Inventors: 孙理军; 余承利
Original assignee: Shanghai Dijia Machinery Equipment Co ltd
Current assignee: Shanghai Dijia Machinery Equipment Co ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-10-21

Abstract

The invention discloses an electrode clamp assembly, which comprises a positioning support assembly, wherein one side of the positioning support assembly is connected with a cantilever, and the other side of the positioning support assembly is connected with a reference positioning mechanism; the cantilever is at least one or more, and is connected with the electrode mechanism; the reference positioning mechanism is connected with a reference seat fixed on the machine tool in a relatively accurate positioning way; the positioning reference ball is further included, and the ball center position of the reference ball is positioned on the axis center line of the cantilever. The shaft center line of the correcting and positioning bracket assembly is in a straight line with the shaft center line of the cantilever. When the electrode is replaced, the clamp and the whole electrode are not required to be replaced, the replacement saves more time, and after the replacement is finished, the original electrode state can be quickly recovered without checking the reference again, the precision of the clamp and the clamping speed are improved, the processing effect of the electrode on a workpiece is improved to a great extent, the processing time is shortened, the design and manufacturing period of a die is shortened, and the design quality is improved.

Description

Electrode clamp assembly

Technical Field

The invention relates to the industry of die machining equipment, in particular to an electrode clamp assembly for machining holes with various complex shapes of dies.

Background

The electric spark machine tool is widely applied to the mold machining industry, and various complex-shaped holes in the mold workpiece can be machined by utilizing a high-frequency power supply to switch on an electrode to discharge to perform electric erosion machining on a machined workpiece. The electric spark machining is suitable for machining high-hardness and difficult-to-machine materials and complex cavities, and plays a very important role in manufacturing industry, particularly in die machining. Usually, the electrode holder first fixes the discharge electrode and then is connected to an electric discharge machine. The existing electric spark machine tool needs to adopt a mode that a clamp clamps an electrode tip to process in the actual processing process, and the use of the electric spark machine tool processing clamp has great influence on the processing precision and the processing time.

The electric spark forming processing is an indispensable important processing means for modern die manufacturing, along with the increasing precision and complexity of product dies, the parts of the dies which need the electric spark forming processing are more and more, and the workload of the electric spark electrode accounts for 20-40% of the total die design workload.

The existing electric spark machine tools mostly adopt a single electrode head to process, time is consumed for punching large-sized workpieces, and only one electrode head can be used for processing the same parallel punching of some workpieces, so that the production efficiency is influenced. At present, most of common clamps used in the machining process of the spark machine are fixed, when an electrode is replaced, the clamp and the electrode are replaced integrally, the replacement takes time, and after the replacement is finished, the reference needs to be checked again; in addition, the original electrode state needs to be restored, and the reference needs to be checked again, so that the processing effect and the processing time of the electrode on the workpiece are greatly influenced. Sometimes, due to the reference check, the fixture needs to be repeatedly disassembled, and the production efficiency and the machining precision are further affected. The adjustability and design of the electric spark electrode clamp are very important for shortening the design and manufacturing period of the die and improving the design quality.

The adjustability and flexibility of the electric spark electrode clamp are usually based on the accuracy of the positioning of the tool clamp, the electric spark electrode clamp in the existing market is usually fixedly connected with the clamp seat and the working chuck by fixing screws in the tool clamp, and the positioning precision of the clamp seat and the working chuck is improved by lacking a necessary positioning assembly.

Disclosure of Invention

The invention aims to provide an electrode clamp assembly for machining holes with various complicated shapes in a die, and solves the problems.

In order to achieve the purpose, the invention provides the following technical scheme: an electrode clamp assembly comprises a positioning support assembly, a cantilever and a reference positioning mechanism, wherein one side of the positioning support assembly is connected with the cantilever, and the reference positioning mechanism is connected with the reference positioning mechanism and used for positioning the cantilever through the positioning support assembly;

the cantilever is at least one or more, and is connected with the electrode mechanism;

the reference positioning mechanism is connected with a reference seat fixed on the machine tool in a relatively accurate positioning way;

the cantilever positioning device further comprises a positioning reference ball, and the ball center position of the reference ball is positioned on the axial center line of the cantilever.

Preferably, the axis center line of the positioning bracket assembly is aligned with the axis center line of the cantilever.

Preferably, the cantilever is four circumferentially and evenly distributed.

Preferably, the reference positioning mechanism comprises a reference sheet, a connecting column fixed with the reference seat is arranged at the center of the reference sheet, and balance columns and positioning holes which are uniformly distributed are arranged on the reference sheet.

Preferably, the reference seat is provided with a positioning column in interference fit with the positioning hole.

Preferably, the electrode mechanism comprises an electrode clamping mechanism, the distal end of the cantilever is provided with a cantilever hole, and the electrode clamping mechanism is inserted into the cantilever hole.

Preferably, still include micromatic setting, micromatic setting includes fine setting screw rod and fine setting nut, at least one side or the both sides face in cantilever hole set up fine setting screw rod hole, fine setting screw rod inserts fine setting screw rod hole through rotation regulation with the relative position of cantilever, the adjustment each axial relative position of electrode fixture.

Preferably, still include rotating base, rotating base includes rotation driving motor subassembly and rotatory mesa, rotating base set up in electrode fixture's below to install on the machine tool board.

Compared with the prior art, the invention has the beneficial effects that:

when the electrode is replaced, the clamp and the whole electrode are not required to be replaced, the replacement saves more time, and after the replacement is finished, the original electrode state can be quickly recovered without checking the reference again, the precision of the clamp and the clamping speed are improved, the processing effect of the electrode on a workpiece is improved to a great extent, the processing time is shortened, the design and manufacturing period of a die is shortened, and the design quality is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is a schematic view of a partial structure of the electrode holder assembly according to the present embodiment;

FIG. 4 is a second partial schematic view of the electrode holder assembly of this embodiment;

FIG. 5 is a schematic structural diagram of an electrode clamping mechanism according to the present embodiment;

FIG. 6 is a schematic structural diagram of a connection structure of the electrode clamping mechanism and the screw rod in the present embodiment;

FIG. 7 is a schematic structural diagram of a connection structure of the electrode clamping mechanism and the fine adjustment device in the present embodiment;

FIG. 8 is a partial cross-sectional view of the cantilever hole showing the connection structure of the electrode clamping mechanism and the fine adjustment device in this embodiment;

in the figure: 1. the electrode clamping device comprises a reference ball, 2, a reference seat, 3, a reference sheet, 4, a cantilever, 5, a fine adjustment device, 6, an electrode clamping mechanism, 7, a rotating base, 8, a vertical positioning column, 9, a pull nail, 10, a balance column, 11, a positioning support component, 12, a nut, 13 and a screw rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 and other views, an electrode clamp assembly comprises a positioning reference ball 1, a positioning reference seat 2, a positioning reference sheet 3, a cantilever 4, a fine adjustment device 5, an electrode clamping mechanism 6 and an associated waterproof rotating base 7.

As shown in fig. 2 and other views, the positioning reference base 2 is connected and fixed with a machine tool, and forms a positioning system with three parts, namely the positioning reference sheet 3, the balance post 10 and the blind rivet 9. The positioning reference sheet 3, the balance column 10 and the blind rivet 9 are fixed on the positioning support assembly 11, the repetition precision of the positioning support assembly 11 can reach 0.003mm, and the machining precision can reach 0.001mm. The vertical positioning column 8 of the reference seat 2 is inserted into the square hole of the reference sheet 3, and the positioning system is transversely positioned through the size of the positioning column and the deformation of the square hole; the heights of the balance columns 10 at the four corners of the reference sheet 3 are uniform, and the balance columns are axially and vertically positioned; the center blind rivet 9 of the reference plate 3 is fastened through air locking, and the whole tool has the hoisting function.

The reference base 2 is fixed to a machine tool and serves as a base for replacing the electrode holder. When the electrode assembly needs to be replaced, the positioning support assembly is released directly at the position through the air locking device, and the purpose of replacing the electrode immediately can be achieved. And the repetition accuracy of 0.003 can be ensured. The material of reference seat 2 adopts mould steel SKD61, opens roughly through machining center, then 3 times liquid nitrogen cryogenic treatment removes material stress, cooperates the optical grinding, and surface roughness reaches Ra0.1, and machining precision 0.001mm.

The reference plate 3 is made of imported carbon steel, is subjected to laser blanking, is subjected to 3 times of liquid nitrogen deep cooling treatment to remove material stress, is matched with an optical mill, and has the surface roughness of Ra0.05 and the machining precision of 0.001mm. The balance column 10 is made of die steel SKD61, and is processed by a length direction precision grinding machine after heat treatment, wherein the length precision is 0.002mm. The rivet 9 is made of carbon steel, the rivet ring is made of aluminum alloy 6061, and the rivet ring is machined by a center-moving machine, so that the precision reaches 0.002mm.

The reference base 2 is provided with 4 vertical positioning columns 8, and the tips of the reference base are provided with chamfers, so that the reference base can be installed in a guiding manner; the reference sheet 3 is fixed on the positioning support component 11, the vertical positioning column 8 is inserted into the reference sheet 3, the size of the positioning column 8 is interference fit relative to the size of the hole of the reference sheet 3, and the reference sheet and the positioning column can be forced to be positioned in 4 transverse directions. The balance columns 10 are fixed on the positioning bracket assembly 11, and the heights of the 4 balance columns 10 need to be corrected during installation, and the four balance columns 10 are abutted against the reference seat 2, so that the axial dimensional accuracy and the parallelism between the reference seat 2 and the reference sheet 3 are ensured. The blind rivet 9 is fixed on the positioning bracket assembly 11, and after the blind rivet is inserted into the reference seat 2, the metal ball inside the reference seat 2 is extruded by using an air pressure device, so that the blind rivet 9 is tensioned on the reference seat 2.

As shown in FIG. 3 and other figures, the material of reference ball 1 is 440-C type stainless steel, and is quenched to a ball-to-shaft eccentricity tolerance of no more than 0.003mm. The positioning bracket assembly 11 is fixed with the cantilever 4, and the axis center line of the positioning bracket assembly 11 is aligned with the axis center line of the cantilever 4. The reference ball 1 is fixed on the cantilever 4, and the ball center position of the reference ball 1 is on the axial center line of the positioning bracket assembly 11. When the device is used, the reference ball 1 touches the surface of a workpiece for multiple times, and the reference surface and the reference point are quickly determined through circle radius calculation.

As shown in figure 4 and other views, the cantilever 4 is made of aviation aluminum alloy, after stress is removed through heat treatment, the machining center produces the aluminum alloy with the precision of 0.005mm, and the surface is subjected to sand blasting and anodic oxidation treatment. The cantilever 4 acts as a bridge for the body of the electrode holder assembly. The positioning bracket assembly 11 and the reference ball 1 are respectively arranged on the axial central line of the cantilever 4, and the fine adjustment device 5 is arranged at the tail end of the cantilever 4.

The electrode mechanism comprises an electrode clamping mechanism 6, the far end of the cantilever 4 is provided with a cantilever hole, and the electrode clamping mechanism 6 is inserted into the cantilever hole.

As shown in fig. 5, 6 and other views, the electrode clamping mechanism 6 is made of industrial aluminum alloy, after stress is removed by heat treatment, the precision reaches 0.01mm by production in a machining center, and the surface is subjected to sand blasting and anodic oxidation treatment.

As shown in figures 6 to 8 and other views, the device also comprises a fine adjustment device 5, the fine adjustment device 5 is made of aviation aluminum alloy, after stress is removed through heat treatment, the machining center produces the alloy with the precision of 0.005mm, and the surface is subjected to sand blasting and anodic oxidation treatment. The trimming means 5 are mounted at the end of the boom 4, and up to 4 groups can be mounted. After the electrode is fixed, the electrode holding mechanism 6 is inserted into the cantilever hole from below the cantilever 4. And 2 screws 13 which are horizontally laid down are arranged on the fine adjustment device 5 and are to be embedded into holes of the cantilever 4 in advance, in the process of inserting the electrode clamping mechanism 6, the nuts of the screws 13 are clamped into clamping grooves on the side surfaces of the electrode clamping mechanism 6, the screws 12 are screwed on the screws 13 on the outer sides, and the relative positions of the nuts 12 and the screws 13 are adjusted to achieve the purpose of fine adjustment of the electrode position. In the discharge process, the individual positions differ by about 1mm, and if the reference is checked again with the reference ball 1, the reference position of the discharge electrode at the individual position changes. Only the position with the position difference is directly adjusted, and the electrode discharging position can be quickly and conveniently adjusted.

And the rotary base 7 comprises a rotary driving motor assembly and a rotary table board, and the rotary base 7 is arranged below the electrode clamping mechanism 6 and is arranged on a machine tool table. When the associated hole site is punched, the associated waterproof rotating base 7 is operated to rotate to a certain angle, so that the purpose of quick rotating punching can be achieved.

The clamp of the embodiment does not need to be corrected after being arranged on a machine, and is high in clamping and positioning and high in precision; after the electrode is clamped, the meter calibration and the centering are not needed, and the direct discharge machining can be carried out; during initial positioning, a reference ball device can be adopted to quickly position a reference surface; the anchor clamps subassembly of this embodiment can also be compatible current electrode holder frock, and the anchor clamps subassembly is adjusted and is joined in marriage the cover design and change the use as required, realizes in the production and processing process, and the slight adjustment requirement of individuality, simple and convenient quick completion, simultaneously, the lightweight design is used to the anchor clamps appearance, accords with workman's operation custom, convenient to use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An electrode holder assembly, comprising: the cantilever positioning device comprises a positioning support assembly, a cantilever and a reference positioning mechanism, wherein one side of the positioning support assembly is connected with the cantilever, and the other side of the positioning support assembly is connected with the reference positioning mechanism;

2. An electrode holder assembly according to claim 1, wherein: and correcting the shaft center line of the positioning support assembly to be on the same straight line with the shaft center line of the cantilever.

3. An electrode holder assembly according to claim 1, wherein: the cantilever is four that the circumference equipartition.

4. An electrode holder assembly according to claim 1, wherein: the datum positioning mechanism comprises a datum plate, a connecting column used for being fixed with the datum seat is arranged in the center of the datum plate, and balance columns and positioning holes which are uniformly distributed are arranged on the datum plate.

5. An electrode holder assembly according to claim 4, wherein: the reference base is provided with a positioning column in interference fit with the positioning hole.

6. An electrode holder assembly according to claim 1, wherein: the electrode mechanism comprises an electrode clamping mechanism, a cantilever hole is formed in the far end of the cantilever, and the electrode clamping mechanism is inserted into the cantilever hole.

7. An electrode holder assembly according to claim 6, wherein: still include micromatic setting, micromatic setting includes fine setting screw rod and fine setting nut, at least one side or the both sides face in cantilever hole set up fine setting screw rod hole, the fine setting screw rod inserts fine setting screw rod hole through rotation regulation with the relative position of cantilever, the adjustment each axial relative position of electrode fixture.

8. An electrode holder assembly according to claim 1, wherein: the electrode clamping mechanism is characterized by further comprising a rotating base, wherein the rotating base comprises a rotating driving motor assembly and a rotating table top, and the rotating base is arranged below the electrode clamping mechanism and is installed on a machine tool table.