CN219900624U

CN219900624U - Special-shaped electrode tool

Info

Publication number: CN219900624U
Application number: CN202321283735.0U
Authority: CN
Inventors: 罗杨
Original assignee: Chongqing Zhixin Industrial Group Co Ltd
Current assignee: CHONGQING ZHIXIN INDUSTRIAL CO LTD
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-10-27
Anticipated expiration: 2033-05-24

Abstract

The utility model relates to the technical field of electrode tools of projection welding machines, and particularly discloses a special-shaped electrode tool, which comprises an upper electrode rod assembly, a lower electrode assembly and a lower electrode assembly, wherein the upper electrode rod assembly comprises a fixing piece and an electrode welding structure; the electrode welding structure comprises a base with a symmetrical structure with the fixing piece, and the base is arranged right below the fixing piece; the height of the base is 60mm; an electrode mounting plate is horizontally arranged below the base and comprises an electrode part and a connecting part, the connecting part is arranged below the electrode mounting plate, and the electrode part is arranged outside the electrode mounting plate; the front end of the electrode part is vertically provided with an electrode rod, and two through holes are formed in the electrode part and are communicated with the electrode rod. The utility model changes the lateral stress of the electrode rod into the vertical stress, avoids the electrode rod from shifting due to the influence of the stress direction when the electrode rod is punched downwards, improves the consistency of electrode welding, ensures the welding accuracy, and can meet the projection welding requirement of special-shaped workpieces.

Description

Special-shaped electrode tool

Technical Field

The utility model relates to the technical field of electrode tools of projection welding machines, in particular to a special-shaped electrode tool.

Background

The projection welder is one kind of equipment for realizing projection welding process of weldment, and is mainly pneumatic pressurized and bearing guided, and has upper and lower electrodes controlled to contact the surface of weldment separately, heated electrically and then collapsed to complete the welding spot. The electrode has the characteristics of flexible welding spot positions and good electrode follow-up performance, and is widely applied to multipoint projection welding and spot welding of mechanical parts such as automobile parts.

However, in the projection welding process, the projection welding machine often has unstable welding, and the welding spot and the preset convex point are deviated, so that the welding accuracy is low, and the follow-up production flow of the weldment is influenced. Meanwhile, the existing projection welding machine can only perform projection welding on parts with more regular shapes of workpieces, and cannot be suitable for projection welding of workpieces with various shapes and structures.

Therefore, in order to solve the problems that the existing projection welding machine is poor in stability during projection welding, the welding spot accuracy is low, and the existing projection welding machine cannot be suitable for various workpiece structures, a special-shaped electrode tool is required to be provided.

Disclosure of Invention

The utility model aims to provide a special-shaped electrode tool for solving the problem that the precision of the conventional projection welding machine is insufficient during projection welding.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model is mainly used for changing the stress direction of the electrode rod into vertical stress by improving the connection mode of the upper electrode rod and the welding machine, so as to improve the electrode strength, improve the stability of the upper electrode rod during stamping, further improve the welding accuracy, ensure the welding consistency of weldments and be suitable for projection welding of special-shaped structures such as the inner side wall of a part. The special-shaped electrode tool comprises a projection welding machine body, wherein an upper electrode rod assembly and a lower electrode rod assembly are arranged at the front end of the machine body, the upper electrode rod assembly comprises a fixing piece and an electrode welding structure, and the electrode welding structure is arranged at the lower end of the fixing piece; the electrode welding structure comprises a base with a symmetrical structure with the fixing piece, and the base is arranged right below the fixing piece; the height of the base is 60mm; an electrode mounting plate is horizontally arranged below the base, the electrode mounting plate comprises an electrode part and a connecting part, the connecting part is arranged below the electrode mounting plate, and the electrode part is arranged outside the electrode mounting plate; the front end of the electrode part is vertically provided with an electrode rod, and two through holes are formed in the electrode part and are communicated with the electrode rod.

The principle and the advantages of the scheme are as follows:

the projection welder in the prior art mainly comprises a machine body, a welding transformer, a pressure transmission device, a microcomputer controller and the like. The welding end for the projection welding machine at present generally comprises an upper electrode rod and a lower electrode rod which are in rod-shaped structures, and as shown in figure 1, the upper electrode rod and the lower electrode rod are respectively fixed at the front end of a fixing piece of the projection welding machine through electrode arms, and the fixing piece is connected with a pressure transmission device, so that the upper electrode rod is controlled to move up and down and contact with the lower electrode rod to finish projection welding. Therefore, whether the upper electrode rod and the lower electrode rod are in accurate butt joint becomes a key for improving the projection welding accuracy. The inventors have used various precision measuring instruments to adjust the positional accuracy of the upper electrode rod and the lower electrode rod, but have found that projection welding misalignment occurs even if the accuracy of alignment is still high.

After multiple tests, the inventor finds that, because the welding ends are controlled to move by pneumatic pressure, the stamping force of the pneumatic pressure is larger, and the strength of the electrode arm is lower, the upper electrode rod can receive a lateral force under the action of the electrode arm, so that the upper electrode rod deflects forward at the moment of downward stamping, the upper electrode rod is unstable, dislocation occurs at the moment of contact, the stability of the upper electrode rod is poor, and the welding point deflection welding is inconsistent. However, the electrode rod also needs cooling water for cooling during projection welding, and the cooling water is conveyed through a water channel on the electrode arm, so that the electrode arm becomes an indispensable part of the existing projection welding machine.

Meanwhile, the existing projection welding machine can only perform projection welding on a planar structure due to the welding end structure, and cannot contact the surface of a workpiece with a special-shaped structure, so that projection welding operation cannot be performed on the special-shaped structure, and the operation is very inconvenient.

The utility model directly serves as a double-loop cooling water pipeline through the through hole, so that the double-loop cooling water pipeline and the electrode mounting plate are integrated, the electrode arm structure necessary in the prior art can be directly canceled, meanwhile, the connection mode of the electrode rod and the welding machine is integrally changed through the electrode welding structure, the electrode rod is changed from the existing lateral stress to the complete vertical stress, the integral strength of the electrode welding structure is improved, the stability is improved, the electrode strength of the electrode rod is improved, and the welding accuracy is further improved. Meanwhile, the electrode welding structure can be used for projection welding of the special-shaped structure, so that the applicability is wider.

Simultaneously, the base is symmetrical with the structure of mounting, further ensures perpendicular atress direction, guarantees the stability of base, and through setting up the height of base, promotes the intensity of base, and then promotes electrode strength. Meanwhile, the electrode mounting plate is directly arranged at the lower end of the base, the electrode mounting plate is directly connected with the electrode rod, the electrode rod is ensured to be stressed stably, the electrode rod is further ensured not to deviate when being lowered, and the welding accuracy is ensured.

Furthermore, the whole electrode part is of a trapezoid structure, the wide end of the electrode part is connected with the front end of the connecting part, and the tip end extends out of the electrode mounting plate and is positioned on the outer side of the electrode mounting plate. The vertical stress of the electrode rod is ensured, and the stability is improved.

Further, an electrode mounting hole is formed in the front end of the electrode part, and the electrode rod is arranged in the electrode mounting hole; the two through holes penetrate through the electrode mounting holes to form a loop. The original cooling water pipeline is directly replaced by the through hole, so that the electrode arm structure can be directly replaced, the stability of the electrode rod is improved, the cooling effect is improved, the conditions of water pipe falling or bursting and the like are reduced, and the electrode rod is more stable and safer to use.

Further, two through holes are arranged in the electrode part in parallel up and down, and the tail ends of the two through holes extend to the front end of the connecting part. Two control valves are respectively arranged on the two side walls of the connecting part and are respectively connected with the upper through hole and the lower through hole. Is convenient to be connected with a high-pressure pipe, effectively controls the circulation of cooling water and ensures the cooling effect.

Further, the lower end surface of the electrode part is an inclined surface, so that the height of the tip end of the electrode part is lower than that of the wide end of the electrode part. The length of the electrode part is 75mm; the height of the tip end is 41mm; the height of the wide head end is 50mm. The stress influence of the electrode part is reduced, and the stability of the electrode rod is ensured.

Further, the length of the base is 175mm, and the width of the base is 150mm. The length of the connecting part is 185mm, the width is 90mm, and the height is 50mm. The connecting stability with the mounting is guaranteed, and base intensity is increased simultaneously, reduces the atress and interferes with, ensures perpendicular atress.

Further, the center distance between the two through holes is 11mm, and the diameter of the through hole is 5mm. The through holes can bear the impact force of the high-pressure water pipe, and meanwhile, the cooling effect is ensured.

Drawings

FIG. 1 is a schematic view of a prior art projection welding machine electrode arm portion;

FIG. 2 is a structural view of a shaped electrode tooling of the present utility model;

FIG. 3 is an enlarged view of the portion A of FIG. 2;

fig. 4 is a schematic structural diagram of an electrode welding structure of the special-shaped electrode tool of the present utility model;

FIG. 5 is a top view of an electrode mounting plate of a shaped electrode tooling of the present utility model;

fig. 6 is a right side view of an electrode mounting plate of a shaped electrode tooling of the present utility model.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the electrode welding device comprises a fixing piece 1, a base 2, an electrode welding structure 3, an electrode mounting plate 31, an electrode rod 4, a through hole 5, an electrode mounting hole 6, a first arc-shaped groove 7, a second arc-shaped groove 8, a connecting hole 9, a machine body 10, a pressure transmission device 12, an air cylinder 13, a microcomputer controller 14, an electrode arm 15, a lower electrode rod assembly 16, a water pipe 17, an electrode part 41, a connecting part 42, a mounting hole 43, a lower electrode rod 51, an electrode arm 52, a mounting frame 53 and a control valve 61.

An embodiment of a shaped electrode tooling, substantially as shown in figure 2, for electrode projection welding of a projection welder, includes an upper electrode stem assembly and a lower electrode stem assembly 16 mounted by bolts to the forward end of the projection welder body 10. The upper electrode stem assembly is disposed relatively perpendicularly to the lower electrode stem assembly 16. Specifically, the projection welding machine includes a machine body 10 having a rectangular structure integrally, a welding transformer (not shown in the figure, the welding transformer is an existing conventional transformer, for example, a control transformer with a model JBK5-160VA may be adopted) is disposed inside the machine body 10, a pressure transmission device 12 is vertically installed on an upper portion of an outer side of the machine body 10, a microcomputer controller 14 is installed on one side of the machine body 10, the microcomputer controller 14 is electrically connected with the welding transformer and the pressure transmission device 12, and in this embodiment, the microcomputer controller 14 may adopt a resistance welding machine controller with a model STS21 to realize electrical signal control.

Specifically, the pressure transmission device 12 comprises a cylinder 13 arranged at the upper end; the direction of the output shaft of the air cylinder 13 is vertical downwards, the bottom of the output shaft of the air cylinder 13 is connected with an upper electrode rod assembly, the upper electrode rod assembly comprises a fixing piece 1 and an electrode welding structure 3, and the electrode welding structure 3 is mounted at the lower end of the fixing piece 1 through bolts. A lower electrode rod assembly 16 is provided directly under the motor welding structure 3, and the lower electrode rod assembly 16 is fixedly mounted on the body 10 by bolts. Specifically, the lower electrode rod assembly 16 includes a lower electrode rod 51, the lower electrode rod 51 is sleeved on an electrode arm 52, and the electrode arm 52 is clamped on a mounting frame 53 of the machine body 10 through a bolt.

Specifically, as shown in the enlarged partial view of the welding end in fig. 3, the whole fixing member 1 has a cuboid structure, two butt-joint holes are formed above the fixing member 1, and the butt-joint holes are connected with the end part of the output shaft of the air cylinder 13. A second arc-shaped groove 8 which penetrates from front to back is arranged at the lower part of the fixing piece 1. The electrode welding structure 3 is welded directly below the fixing member 1 by bolts.

With reference to the electrode welding structure 3 shown in fig. 4, the electrode welding structure 3 comprises a base 2 with a rectangular structure as a whole, and the base 2 is formed by injection molding of lozirco copper. The base 2 and the fixing piece 1 are identical in structure and are oppositely connected, the length of the base 2 is 175mm, the width of the base 2 is 150mm, and the height of the base 2 is 60mm. The up end of base 2 is equipped with the first arc wall 7 that link up from front to back, and first arc wall 7 sets up with second arc wall 8 is relative, and the lock is a cylindrical through-hole, the installation of being convenient for adjusts. A plurality of connecting holes 9 are formed in the base 2, the connecting holes 9 are respectively formed in two sides of the first arc-shaped groove 7, and in the embodiment, the connecting holes 9 are respectively 4 threaded holes. Correspondingly, four T-shaped nuts matched with the connecting holes 9 are respectively arranged on the lower end face of the fixing piece 1, and the base 2 is conveniently and fixedly connected with the fixing piece 1 through the matching of the T-shaped nuts and the connecting holes 9.

An electrode mounting plate 31 is mounted below the base 2, and an electrode rod 4 is mounted at the front end below the electrode mounting plate 31.

Specifically, as shown in fig. 5 and 6, the electrode mounting plate 31 has a trapezoidal structure as a whole. The electrode mounting plate 31 includes an electrode portion 41 and a connection portion 42. The connection portion 42 is provided below the base 2. The connection portion 42 has a rectangular structure as a whole, and the connection portion 42 has a length of 185mm, a width of 90mm, and a height of 50mm. By providing four mounting holes 43 in each of the connection portions 42, the electrode mounting plate 31 is mounted below the front end of the base 2 through the mounting holes 43. An electrode portion 41 is integrally formed at the front end of the connection portion 42, the electrode portion 41 has a trapezoidal structure as a whole, and the electrode portion 41 is provided outside the front end of the base 2. The length of the electrode portion 41 is 75mm, the wide end of the electrode portion 41 and the front end of the connecting portion 42 are integrally formed, the width thereof is 90mm, and the tip end width is 40mm.

Specifically, as shown in the right view of the electrode mounting plate 31 in fig. 6, the lower end surface of the electrode portion 41 is an inclined surface, so that the front end height of the lower end surface is 41mm, and the rear end height is 50mm, thereby ensuring that the stress is vertical. An electrode mounting hole 6 is formed at the front end of the electrode part 41, and the electrode rod 4 is fixedly mounted in the electrode mounting hole 6; in this embodiment, the electrode mounting hole 6 is a multi-threaded hole with a diameter of 19.5mm, a screw pitch of 0.1mm and a lead of 10.

Specifically, two through holes 5 with the same structure are transversely formed in the lower portion of the electrode portion 41, the two through holes 5 are vertically arranged at the lower end of the electrode mounting hole 6 in parallel, the front ends of the two through holes 5 are communicated with the electrode mounting hole 6, the center distance of the two through holes 5 is 11mm, and the diameter of the through holes 5 is 5mm. The upper through hole 5 is used as a water inlet pipeline of cooling water, and the lower through hole 5 is used as a water outlet pipeline of cooling water, so that a double-loop cooling water pipeline is formed, and the electrode rod 4 is cooled. The end of the through hole 5 extends to the front end of the connecting part 42, control valves 61 connected with cooling water pipes are respectively arranged at two sides of the front end of the connecting part 42, the control valves 61 are connected with a common high-pressure water delivery pipe, cooling water is delivered into the through hole 5, and then the water delivery pipe of the electrode arm is replaced, so that the whole structure of the electrode arm is cancelled. Meanwhile, the through hole 5 is directly used as a waterway pipeline, compared with the plastic water pipe 17 used by the electrode arm 15, the waterway pipeline is not easy to deform under the action of high-pressure water, the condition of bursting cannot occur, the problem that a water pipe falls off is avoided, and the cooling effect is better.

In this embodiment, be connected electrode pole 4 through electrode welded structure and welding machine, will electrode welded structure sets up as an organic whole formula structure, is connected through mounting 1 on base 2 and the welding machine, guarantees the connection stability of base 2 and mounting 1, through setting up the shape of base 2 and the intensity of high promotion base 2, ensures that the welding machine passes to the power on the base 2 is vertical atress, and then guarantees that electrode pole 4 that is connected to the base 2 below is also vertical atress, and then avoids electrode pole 4 to take place the skew, effectively improves electrode pole's electrode intensity. Meanwhile, the electrode rod 4 is directly cooled through the through hole 5 formed in the electrode part 41 in an integrally formed manner, the electrode arm 15 structure can be directly replaced by the double-loop cooling water pipeline formed by the through hole 5, the electrode arm connecting structure can be directly canceled while the cooling effect is improved, the vertical stress of the electrode rod is further ensured, the consistency in the electrode welding process is effectively ensured, and the welding accuracy is improved.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a dysmorphism electrode frock, includes the projection welding machine fuselage, and the fuselage front end is equipped with electrode pole subassembly and lower electrode pole subassembly, its characterized in that: the upper electrode rod assembly comprises a fixing piece and an electrode welding structure, and the electrode welding structure is arranged at the lower end of the fixing piece; the electrode welding structure comprises a base with a symmetrical structure with the fixing piece, and the base is arranged right below the fixing piece; the height of the base is 60mm; an electrode mounting plate is horizontally arranged below the base, the electrode mounting plate comprises an electrode part and a connecting part, the connecting part is arranged below the electrode mounting plate, and the electrode part is arranged outside the electrode mounting plate; the front end of the electrode part is vertically provided with an electrode rod, and two through holes are formed in the electrode part and are communicated with the electrode rod.

2. The profiled electrode tooling of claim 1 wherein: the whole electrode part is of a trapezoid structure, the wide end of the electrode part is connected with the front end of the connecting part, and the pointed end extends out of the electrode mounting plate and is positioned on the outer side of the electrode mounting plate.

3. The profiled electrode tooling of claim 1 wherein: an electrode mounting hole is formed in the front end of the electrode part, and the electrode rod is arranged in the electrode mounting hole; the two through holes penetrate through the electrode mounting holes to form a loop.

4. A profiled electrode tooling as claimed in claim 3 wherein: the two through holes are arranged in the electrode part in parallel up and down, and the tail ends of the two through holes extend to the front end of the connecting part.

5. The profiled electrode tooling of claim 4 wherein: two control valves are respectively arranged on the two side walls of the connecting part and are respectively connected with the upper through hole and the lower through hole.

6. The profiled electrode tooling of claim 2 wherein: the lower end surface of the electrode part is an inclined surface, so that the height of the tip end of the electrode part is lower than that of the wide end of the electrode part.

7. The profiled electrode tooling of claim 6 wherein: the length of the electrode part is 75mm; the height of the tip end is 41mm; the height of the wide head end is 50mm.

8. The profiled electrode tooling of claim 1 wherein: the base is 175mm long and 150mm wide.

9. The profiled electrode tooling of claim 1 wherein: the length of the connecting portion was 185mm, the width was 90mm, and the height was 50mm.

10. The profiled electrode tooling of claim 1 wherein: the center distance between the two through holes is 11mm, and the diameter of the through hole is 5mm.