CN110899931A

CN110899931A - Quick clamping electric spark overlaying welding gun

Info

Publication number: CN110899931A
Application number: CN201911301368.0A
Authority: CN
Inventors: 王建辉; 赵克勇
Original assignee: Individual
Current assignee: Shanghai Langxian Electromechanical Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-03-24

Abstract

The invention discloses a rapid clamping electric spark overlaying welding gun which comprises a welding rod, a movable clamping jaw, a protective cover, a movable gun body, a rotary pushing pull ring, a stop ring, a gun middle shell, a gun shaft, a telescopic gun body and a middle inner gun body. The invention adopts a mode of the movable clamping jaw to clamp the welding rod, the movable clamping jaw rotates by taking the first convex ring at the front end of the gun shaft as a shaft, and the movable clamping jaw is opened and closed under the forward and backward extrusion of the telescopic ring, the opening angle of the opening and closing is large, the welding rod is fully released when the telescopic ring is opened, the operation and the replacement are convenient, and meanwhile, the welding rod with different diameters in a certain range can be clamped due to the large opening angle.

Description

Quick clamping electric spark overlaying welding gun

Technical Field

The invention relates to a welding gun, in particular to a quick clamping electric spark overlaying welding gun.

Background

The electric spark deposition surfacing welding belongs to one type of cold welding, a welding material is continuously deposited and surfaced on a welded workpiece product in a micro molten pool mode by utilizing the discharge of micro electric arcs, the heat input quantity in the welding process is low, the temperature rise of the workpiece product is small, the heat influence on the workpiece product is small, the heat influence cannot be achieved by the traditional arc welding, and particularly, the repairing effect on aluminum alloy is particularly obvious.

The working method of the existing electric spark overlaying welding gun is that a straight welding rod (welding material) is clamped on a chuck (the chuck is the chuck of a small electric drill, the chuck is not too large, the welding gun is too thick due to overlarge condition, an operator cannot conveniently and flexibly hold the chuck, meanwhile, a small motor in the welding gun is small in output torque, the chuck is large in load, so that the rotating speed is reduced, the welding effect is influenced, the chuck is arranged on a transmission shaft, an annular carbon brush is arranged on the transmission shaft and attached to the back of the chuck, the carbon brush is connected with a welding machine through a wire, the motor drives the chuck and the welding rod to rotate through the transmission shaft, and pulse discharge realizes welding.

However, the welding gun has the disadvantages that the heat generated in the welding process is transferred to the chuck, so that the chuck is overheated, the welding rod is consumed quickly, a new welding rod needs to be replaced when the length of the welding rod is too short, the chuck needs to be loosened manually frequently, the welding rod is pulled out, and the chuck is screwed to clamp the welding rod. Because the chuck works at high temperature for a long time, the chuck is often tensioned or even blocked due to overheating, the phenomenon that a chuck key rotates difficultly or rotates immovably is avoided, and the welding rod is replaced difficultly, so that the chuck of the welding gun is often replaced. In addition, the welding rod cannot be clamped tightly due to the fact that the welding rod is hard to screw, contact between the welding rod and the chuck is poor, electric discharge is caused during welding, welding is affected, and damage to the chuck is accelerated.

Moreover, when the chuck is tightened, the chuck key is manually rotated, but the chuck is in a high-temperature state at the moment, so that the chuck is carefully winged to prevent scalding, and therefore, the efficiency of adjusting the welding rod is low, but the welding rod is quickly consumed during welding, the frequency of replacing the welding rod is high, and the working efficiency is low.

If a quick chuck such as an electric grinding head is adopted, the quick chuck is not suitable, because the chuck is an integral chuck formed by cutting an opening after turning by adopting an integral round copper rod, external force is applied to clamp an excircle during working, the chuck tightens and clamps a grinding head round rod, and when the external force is loosened, the chuck is opened by self elasticity, and the chuck rod is loosened, so that the grinding head is assembled and disassembled, the mode is difficult to be used on an electric spark surfacing repair machine, and the reason is that 1, when the electric spark surfacing repair machine works, the temperature is high, and after the high temperature is long time, the elasticity of the chuck is continuously eliminated, so that the chuck cannot be opened and is always in a tightened state and is difficult to be assembled and. 2. The diameter specifications of the commonly used welding rod are several, and the inner hole of the conventional chuck is fixedly corresponding to a certain size, so that the conventional chuck has no universality. 3. The electric spark surfacing welding works by pulse heavy current, and the heavy current can often cause discharge and ignition between a welding rod and a chuck to cause a rough surface of a contact surface, so that the welding rod is inconvenient to pull out. Due to the reasons, the clamping mode cannot be applied to the welding gun of the electric spark surfacing repair machine.

So far, the problems that the welding rod of the electric spark overlaying welding gun is inconvenient to replace and the chuck of the electric drill is easy to burn are not solved, and the electric spark overlaying welding gun is always a common fault. Therefore, the existing welding gun needs to be improved, the problems that the chuck of the electric drill is frequently replaced and the welding material adjusting speed is low are solved, and the power and the starting point of the welding gun are completed.

Disclosure of Invention

The invention aims to provide a rapid clamping electric spark overlaying welding gun with convenient replacement of a welding rod, good practicability and reliability and high working efficiency, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a quick clamping electric spark overlaying welding gun comprises a welding rod, a movable clamping jaw, a protective cover, a movable gun body, a rotary pushing pull ring, a stop ring, a gun middle shell, a gun shaft, a telescopic gun body and a middle inner gun body, wherein the welding rod is clamped in the movable clamping jaw, the movable clamping jaw is arranged around the front part of the gun shaft and the periphery of the movable clamping jaw, the telescopic ring is arranged at the front part of the telescopic gun body through a connecting bearing, the gun shaft is arranged at the inner side of the middle inner gun body through a first bearing, a first bearing fixing insulating ring, a second bearing and a second bearing fixing insulating ring, the telescopic gun body is arranged at the outer side of the middle inner gun body, the movable gun body is arranged on the rear end step circumference of the middle inner gun body, the rear side outer part of the movable gun body is provided with the gun middle shell, the inner side of the movable gun body is provided with the stop ring, the inner part of the movable gun body is also provided with the rotary pushing pull ring, and the rotary pushing pull ring is matched with the outer, and is arranged on the outer side of the telescopic gun body.

Preferably, the front part of the gun shaft is provided with a movable clamping jaw, the outer part of the movable clamping jaw is a curved surface, and the front end and the tail end of the movable clamping jaw are in a tilting shape.

Preferably, the clamping petals of the movable clamping jaw are multiple in number.

Preferably, the front end of the gun shaft is provided with a deep hole, and the side wall of the hole is provided with an air hole communicated with the outer side.

Preferably, the middle inner gun body is provided with a gas through hole communicated with the gas pipe and the space outside the gun shaft.

Preferably, the rotary push-pull ring and the movable gun body are integrally formed.

Preferably, the front end of the gun shaft is provided with a first convex ring, and the first convex ring is matched with a groove on the inner side of the movable clamping jaw.

Preferably, the material of rifle axle and movable clamping jaw chooses electrically conductive material for use.

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

1. the invention adopts a mode of the movable clamping jaw to clamp the welding rod, the movable clamping jaw rotates by taking the first convex ring at the front end of the gun shaft as the shaft to realize opening and closing, the opening angle of the opening and closing is large, the welding rod is fully released when the welding rod is opened, the operation and the replacement are convenient, and meanwhile, the welding rod with different diameter specifications in a certain range can be held due to the large opening angle.

2. The invention adopts a mode of converting rotary torque force into forward and backward thrust force, can realize the clamping or releasing of welding materials only by rotating the gun body during operation, has extremely simple and convenient operation, and is also the key point of the invention.

3. When the welding rod is clamped, the second convex ring on the inner side of the telescopic ring presses the front end of the movable clamping jaw, the rotating shaft of the movable clamping jaw is arranged at the rear end, so that the torque is increased, the clamping of the welding rod is tighter, and when the welding rod is released, the rear end of the movable clamping jaw is pressed, although the torque is short, the force required by the release is small, so that the welding rod can be completely released, and meanwhile, because the torque is small, the opening when the welding rod is opened is large, and the welding rod is suitable for welding rods with different diameters in a certain range.

4. Through the structural design, the welding gun welding rod replacement device improves the convenience, the practicability and the reliability of welding rod replacement and further improves the working efficiency of the welding gun.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1-welding rod; 2-moving the clamping jaw; 3-a telescopic ring; 4-a protective cover; 5-a first bearing; 6-moving the gun body; 7-rotating the push-pull ring; 8-a stop ring; 9-gun middle shell; 10-gun shaft; 11-connecting the bearing; 12-telescopic gun body; 13-first bearing fixed insulating ring; 14-middle inner gun body; 15-a second bearing; 16-second bearing fixed insulating ring; 17-a first convex ring; 18-a groove; 19-second bulge loop.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

A quick clamping electric spark overlaying welding gun comprises a welding rod 1, a movable clamping jaw 2, a telescopic ring 3, a protective cover 4, a movable gun body 6, a rotary push-pull ring 7, a stop ring 8, a gun middle shell 9, a gun shaft 10, a telescopic gun body 12 and a middle inner gun body 14, wherein the welding rod 1 is clamped in the movable clamping jaw 2, the movable clamping jaw 2 surrounds the front part of the gun shaft 10, the periphery of the movable clamping jaw 2 is provided with the telescopic ring 3, the telescopic ring 3 restricts the moving range of the movable clamping jaw 2, the telescopic ring 3 is arranged at the front part of the telescopic gun body 12 through a connecting bearing 11, the outside of the movable clamping jaw 2 is a curved surface, the front end and the tail end of the movable clamping jaw 2 are in a tilting shape, the tilting height is greater than the size of a second convex ring 19 inside the telescopic ring 3, the movable clamping jaw 2 is subjected to front extrusion and rear extrusion when the telescopic ring 3 moves back and forth, and back, and forth tilting effects taking the second convex, the front end of the inner side of the telescopic ring 3 is provided with a second convex ring 19 for pushing the front end and the rear end of the movable clamping jaw 2 to tilt, the telescopic ring 3 can synchronously rotate along with the gun shaft 10 while clamping the movable clamping jaw 2, the gun shaft 10 is arranged on the inner side of the middle inner gun body 14 through a first bearing 5, a first bearing fixed insulating ring 13, a second bearing 15 and a second bearing fixed insulating ring 16, the gun shaft 10 is arranged at the center of the welding gun, the front end of the gun shaft 10 is provided with a first convex ring 17, the first convex ring 17 is matched with a groove 18 on the inner side of the movable clamping jaw 2 to prevent the movable clamping jaw 2 from moving forwards and backwards, and meanwhile, the gun shaft 10 is hollow or the front part of the gun shaft 10 is provided with a deep hole, the side wall of the deep hole is provided with an air hole communicated with the outer side, the deep hole is used as a space for accommodating a welding rod and is used as a passage for air to flow to the front end of the gun, the hollow or deep hole of the gun shaft 10 is used as the deep space of the welding rod 1 and the channel of the protective gas, the material of the gun shaft 10 and the movable clamping jaw 2 is selected from conductive material, the welding current is conducted to the movable clamping jaw 2 from the gun shaft 10 and then conducted to the welding rod 1, the telescopic gun body 12 is arranged at the outer side of the middle inner gun body 14, is matched with the excircle of the middle inner gun body 14 and can slide back and forth, the middle inner gun body 14 is provided with a gas through hole communicated with the gas pipe and the space at the outer side of the gun shaft, the gas through hole is connected with the gas pipe and internally communicated with the space at the outer side of the gun shaft, the gas is communicated into the gun shaft through the hole at the side wall of the gun shaft, the movable gun body 6 is arranged on the circumference of the step at the rear end of the middle inner gun body 14, the outer part at the rear side of the movable gun body 6 is provided with a gun middle shell 9, the inner side of the movable gun body 6 is provided with a stop ring 8, unable drunkenness around, the front end that moves the rifle body 6 is equipped with safety cover 4, and safety cover 4 mainly used retrains the gaseous flow direction of protective gas and protects operating personnel can not touch inside high temperature part, the inside that moves the rifle body 6 still is equipped with rotatory pull ring 7 that pushes away, and rotatory pull ring 7 that pushes away can rotate around middle interior rifle body 14 under the drive that moves the rifle body 6, rotatory pull ring 7 that pushes away is through the screw thread fit in inboard screw thread and the flexible rifle body 12 outside to install in the outside of the flexible rifle body 12, the rotatory pull ring 7 that pushes away promotes the flexible rifle body 12 back-and-forth movement through the screw thread when rotating, rotatory pull ring 7 that pushes away also can close as an organic whole with moving the rifle body 6, moves the rifle body 6 and be integrated into one piece part.

The working principle of the invention is as follows: before welding, the rotary movable gun body 6 drives the rotary push-pull ring 7 to rotate, the rotary push-pull ring 7 pushes the telescopic gun body 12 to move back and forth through threads, the telescopic gun body 12 moves back and forth to drive the telescopic ring 3 to move back and forth, and the back and forth movement of the telescopic ring 3 drives the movable clamping jaw 2 to clamp or open, so that the effect of clamping the welding rod 1 or releasing the welding rod 1 is realized; during welding, power drives the gun shaft 10 to rotate, the gun shaft 10 drives the telescopic ring 3, the movable clamping jaw 2 and the welding rod 1 to rotate, and in the process, welding current is conducted to the movable clamping jaw 2 and the welding rod 1 through the gun shaft 10 and finally conducted to a product to generate electric arc for welding.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. The quick clamping electric spark overlaying welding gun is characterized by comprising a welding rod (1), a movable clamping jaw (2), a telescopic ring (3), a protective cover (4), a movable gun body (6), a rotary push-pull ring (7), a stop ring (8), a gun middle shell (9), a gun shaft (10), a telescopic gun body (12) and a middle inner gun body (14), wherein the welding rod (1) is clamped in the movable clamping jaw (2), the movable clamping jaw (2) surrounds the front part of the gun shaft (10) and is provided with the telescopic ring (3) at the periphery of the movable clamping jaw (2), the telescopic ring (3) is arranged at the front part of the telescopic gun body (12) through a connecting bearing (11), the gun shaft (10) is arranged at the inner side of the middle inner gun body (14) through a first bearing (5), a first bearing fixing insulating ring (13), a second bearing (15) and a second bearing fixing insulating ring (16), and the telescopic gun body (12) is arranged at the outer side of the middle inner gun body (14), move the rifle body (6) and set up in the centre on the rear end step circumference of the rifle body (14), move the outside of the rear side of the rifle body (6) and be equipped with casing (9) in the middle of the rifle, the inboard of moving the rifle body (6) is equipped with check ring (8), the inside of moving the rifle body (6) still is equipped with rotatory push-and-pull ring (7), rotatory push-and-pull ring (7) are through the screw thread of inboard and the screw-thread fit in the flexible rifle body (12) outside to install in the outside of the flexible rifle body (12).

2. The rapid clamping electric spark overlaying welding gun according to claim 1, wherein the front part of the gun shaft (10) is provided with a movable clamping jaw (2), the outer part of the movable clamping jaw (2) is a curved surface, and the front end and the tail end of the movable clamping jaw (2) are in a tilting shape.

3. The rapid clamp electric discharge surfacing torch according to claim 1 or 2, characterized in that the number of the clamping lobes of the movable clamping jaw (2) is plural.

4. The rapid clamping electric spark overlaying welding gun according to claim 1, wherein the front end of the gun shaft (10) is provided with a deep hole, and the side wall of the hole is provided with an air hole communicated with the outside.

5. The rapid clamping electric spark overlaying welding gun according to claim 1, wherein a gas through hole communicating the gas pipe with the space outside the gun shaft is formed on the middle inner gun body (14).

6. The rapid clamping electric spark overlaying welding gun according to claim 1, wherein a first convex ring (17) is arranged at the front end of the gun shaft (10), and the first convex ring (17) is matched with a groove (18) on the inner side of the movable clamping jaw (2).

7. The rapid clamping electric spark overlaying welding gun according to claim 1 or 4, wherein the gun shaft (10) and the movable clamping jaw (2) are made of conductive materials.