A fast-clamping electric spark welding gun

Abstract

The invention discloses a quick-clamping electric spark welding gun, comprising a welding rod, a movable clamping jaw, a protective cover, a movable gun body, a rotating push-pull ring, a stop ring, a gun intermediate shell, a gun shaft, a telescopic gun body and an intermediate inner gun body, wherein the welding rod is clamped in the movable clamping jaw, the movable clamping jaw surrounds the front part of the gun shaft and a telescopic ring is arranged on the periphery of the movable clamping jaw, the telescopic ring is installed on the front end of the telescopic gun body through a connecting bearing, the gun shaft is installed on the inner side of the intermediate inner gun body through a first bearing, a first bearing fixing insulating ring, a second bearing and a second bearing fixing insulating ring, and the telescopic gun body is arranged on the outer side of the intermediate inner gun body. The invention adopts a movable clamping jaw to clamp the welding rod, the movable clamping jaw rotates with the first convex ring at the front end of the gun shaft as the axis, and is opened and closed under the front and rear squeezing of the telescopic ring, the opening angle of the opening and closing is large, the welding rod is fully released when opening, and the operation and replacement are convenient, and at the same time, due to the large opening angle, welding rods of different diameters within a certain range can be clamped.

Description

Technical Field

[0001] The invention relates to a welding gun, in particular to a fast clamping electric spark cladding welding gun. Background Art

[0002] Electrospark deposition welding is a type of cold welding. It uses the discharge of a micro-arc to continuously deposit welding materials on the workpiece in the form of a tiny molten pool. The welding process has low heat input, a small temperature rise in the workpiece, and little thermal impact on the workpiece, which is something that traditional arc welding cannot achieve. The repair effect is particularly obvious for aluminum alloys.

[0003] The working method of the current electric spark welding gun is to clamp the straight welding rod (welding material) into the chuck (this type of chuck is the chuck of a small electric drill. This type of chuck should not be too large. If it is too large, the welding gun will be too thick, and the operator will not be convenient and flexible to hold it. At the same time, the small motor in the welding gun has a small output torque, and the large chuck causes a large load, which reduces the speed and affects the welding effect. The chuck is installed on the transmission shaft, and an annular carbon brush is installed on the transmission shaft close to the back of the chuck. The carbon brush is connected to the welding machine through a wire, and the motor drives the chuck and the welding rod to rotate through the transmission shaft, and pulse discharge is used to achieve welding.

[0004] However, the disadvantage of this welding gun is that the heat generated during welding will be transferred to the chuck, causing the chuck to overheat, and the welding rod will be consumed quickly. When the welding rod is too short, a new welding rod must be replaced, and the chuck must be manually loosened frequently, the welding rod must be pulled out, and the chuck must be tightened to clamp the welding rod. Since the chuck works at high temperature for a long time, overheating often causes the chuck to tighten or even get stuck, and the chuck key is laborious to rotate or cannot rotate, and it is laborious to replace the welding rod, so the welding gun chuck must be replaced frequently. In addition, the laborious tightening will also cause the welding rod to not be clamped tightly, the contact between the welding rod and the chuck is poor, and discharge and sparking will occur during welding, affecting welding and accelerating the damage of the chuck.

[0005] Furthermore, each time the chuck is loosened or tightened, the chuck key must be manually rotated, but the chuck is at a high temperature at this time, so caution must be exercised to prevent burns. Therefore, the efficiency of adjusting the welding rod is very low, but the welding rod is consumed quickly during welding work, and the welding rod is replaced frequently, so the work efficiency is low.

[0006] If a quick chuck such as an electric grinding head is used, it is not applicable because this chuck is made of an integrated round copper rod, which is cut and opened after turning. When working, an external force is applied to clamp the outer circle, and the chuck tightens and clamps the grinding head round rod. When the external force is released, the chuck opens by its own elastic force, and the chuck rod is released, so that the loading and unloading of the grinding head is realized. This method is difficult to use on the electric spark welding repair machine. The reasons are as follows: 1. The electric spark welding repair machine is high temperature when working. After a long period of high temperature, the elastic force of the chuck itself is gradually eliminated, resulting in the chuck being unable to spring open and always in a tightened state, making it difficult to load and unload. 2. There are several commonly used diameter specifications of welding rods. The inner hole of this conventional chuck is fixed to a certain size and is not universal. 3. Electric spark welding relies on a large pulse current when working. This large current often causes discharge and sparking between the welding rod and the chuck, resulting in a pockmarked contact surface, which is inconvenient to pull out the welding rod. The above reasons make it impossible to use this clamping method on the welding gun of the electric spark cladding repair machine.

[0007] So far, the problem of inconvenient replacement of welding rods and easy burning of electric drill chucks of electric spark welding guns has not been solved, which has always been a common problem of electric spark welding guns. Therefore, it is necessary to improve the existing welding guns to solve the problems of frequent replacement of electric drill chucks and slow adjustment of welding materials. This is the motivation and starting point for the completion of this patent. Summary of the invention

[0008] The object of the present invention is to provide a quick-clamping electric spark cladding welding gun which is convenient for replacing welding rods, has good practicability, reliability and high working efficiency, so as to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A quick-clamping electric spark welding gun comprises a welding rod, a dynamic clamping jaw, a protective cover, a dynamic gun body, a rotating push-pull ring, a stop ring, a gun intermediate shell, a gun shaft, a telescopic gun body and an intermediate inner gun body, the welding rod is clamped in the dynamic clamping jaw, the dynamic clamping jaw surrounds the front part of the gun shaft and a telescopic ring is provided on the periphery of the dynamic clamping jaw, the telescopic ring is installed at the front part of the telescopic gun body through a connecting bearing, the gun shaft is installed on the inner side of the intermediate 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 on the outer side of the intermediate inner gun body, the dynamic gun body is arranged on the rear end step circumference of the intermediate inner gun body, the rear side of the dynamic gun body is provided with a gun intermediate shell, the inner side of the dynamic gun body is provided with a stop ring, the interior of the dynamic gun body is also provided with a rotating push-pull ring, the rotating push-pull ring cooperates with the outer side of the telescopic gun body through the inner thread and is installed on the outer side of the telescopic gun body.

[0011] Preferably, a dynamic clamping jaw is provided at the front portion of the gun shaft, the exterior of the dynamic clamping jaw is a curved surface, and the front end and the rear end of the dynamic clamping jaw are in a raised shape.

[0012] Preferably, the movable clamping jaw has a plurality of clamping petals.

[0013] Preferably, a deep hole is provided at the front end of the gun shaft, and an air hole communicating with the outside is provided on the side wall of the hole.

[0014] Preferably, the middle inner gun body is provided with a gas through hole connecting the air pipe and the outer space of the gun shaft.

[0015] Preferably, the rotating push-pull ring and the movable gun body are integrally processed and formed components.

[0016] Preferably, a first convex ring is provided at the front end of the gun shaft, and the first convex ring cooperates with a groove on the inner side of the dynamic clamping jaw.

[0017] Preferably, the gun shaft and the movable clamping jaw are made of conductive material.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts a dynamic clamping jaw to clamp the welding rod. The dynamic clamping jaw rotates with the first convex ring at the front end of the gun shaft as the axis to achieve opening and closing. The opening angle of this opening and closing is large, and the welding rod is fully released when opened, which is convenient for operation and replacement. At the same time, due to the large opening angle, welding rods of different diameters within a certain range can be clamped.

[0020] 2. The present invention adopts a method of converting rotational torque into forward and backward thrust. During operation, the welding material can be clamped or released by simply rotating the gun body. The operation is extremely simple and convenient, which is also the key point of the present invention.

[0021] 3. When the welding rod of the present invention is clamped, the second convex ring on the inner side of the telescopic ring squeezes the front end of the movable jaw, and the rotating axis of the movable jaw is at the rear end, so that the torque is increased, and thus the welding rod is clamped tighter. When releasing, the rear end of the movable jaw is squeezed. Although the torque is short, the force required for release is small, so the welding rod can be completely released. At the same time, due to the small torque, the opening when opened is large, which is suitable for welding rods of different diameters within a certain range.

[0022] 4. The present invention improves the convenience, practicality and reliability of replacing welding rods and further improves the working efficiency of the welding gun through the above-mentioned structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] In the figure: 1-welding rod; 2-moving clamping jaw; 3-telescopic ring; 4-protective cover; 5-first bearing; 6-moving gun body; 7-rotating push-pull ring; 8-stop ring; 9-middle shell of the gun; 10-gun shaft; 11-connecting bearing; 12-telescopic gun body; 13-first bearing fixing insulating ring; 14-middle inner gun body; 15-second bearing; 16-second bearing fixing insulating ring; 17-first convex ring; 18-groove; 19-second convex ring. DETAILED DESCRIPTION

[0025] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0026] A quick-clamping electric spark welding gun comprises a welding rod 1, a dynamic clamping jaw 2, a telescopic ring 3, a protective cover 4, a dynamic gun body 6, a rotating push-pull ring 7, a stop ring 8, a gun intermediate housing 9, a gun shaft 10, a telescopic gun body 12 and an intermediate inner gun body 14. The welding rod 1 is clamped in the dynamic clamping jaw 2, the dynamic clamping jaw 2 surrounds the front part of the gun shaft 10 and the outer periphery of the dynamic clamping jaw 2 is provided with a telescopic ring 3, the telescopic ring 3 restricts the range of movement of the dynamic clamping jaw 2, the telescopic ring 3 is installed at the front part of the telescopic gun body 12 through a connecting bearing 11, the outer part of the dynamic clamping jaw 2 is a curved surface, the front end and the end of the dynamic clamping jaw 2 are in a warped shape, the warping height is greater than the size of the second convex ring 19 inside the telescopic ring 3, and the telescopic ring 3 forms a front extrusion and a rear extrusion on the dynamic clamping jaw 2 when moving forward and backward, forming a gun shaft 10. The second convex ring 19 serves as a seesaw effect of the fulcrum. The inner front end of the telescopic ring 3 is provided with a second convex ring 19, which is used to push the front and rear end tilting parts of the dynamic clamping jaw 2. The telescopic ring 3 can ensure that the dynamic clamping jaw 2 is clamped while it can also rotate synchronously with the gun shaft 10. The gun shaft 10 is installed on the inner side of the middle inner gun body 14 through the first bearing 5, the first bearing fixing insulating ring 13, the second bearing 15 and the second bearing fixing insulating ring 16. The gun shaft 10 is set 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 cooperates with the groove 18 on the inner side of the dynamic clamping jaw 2 to prevent the dynamic clamping jaw 2 from moving back and forth. At the same time, it serves as the turning axis of the dynamic clamping jaw 2 to realize the opening and closing action of the dynamic clamping jaw 2. The gun shaft 10 is hollow or the front part of the gun shaft 10 A deep hole is provided, and the side wall of the deep hole is provided with an air hole connected to the outside. The deep hole serves as a space for accommodating the welding rod and as a channel for gas to flow to the front end of the gun. The hollow or deep hole of the gun shaft 10 is used as a deep space for the welding rod 1 and a channel for protective gas. The material of the gun shaft 10 and the dynamic clamping jaw 2 is selected from conductive materials. The welding current is transmitted from the gun shaft 10 to the dynamic clamping jaw 2, and then to the welding rod 1. The telescopic gun body 12 is arranged on the outside of the middle inner gun body 14, and cooperates with the outer circle 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 connecting the air pipe and the outer space of the gun shaft. The gas through hole is connected to the air pipe and connected to the outer space of the gun shaft. The gas flows into the gun shaft through the hole on the side wall of the gun shaft. The dynamic gun body 6 is arranged on the middle inner gun On the rear end step circumference of the body 14, a gun intermediate shell body 9 is provided on the rear side of the movable gun body 6, and a stop ring 8 is provided on the inner side of the movable gun body 6. The movable gun body 6 can rotate around the intermediate inner gun body 14 when working, and at the same time, under the constraint of the stop ring 8, it cannot move forward and backward. A protective cover 4 is provided at the front end of the movable gun body 6. The protective cover 4 is mainly used to restrict the flow direction of the protective gas and protect the operator from touching the high-temperature parts inside. A rotating push-pull ring 7 is also provided inside the movable gun body 6. The rotating push-pull ring 7 can rotate around the intermediate inner gun body 14 driven by the movable gun body 6. The rotating push-pull ring 7 cooperates with the thread on the outer side of the telescopic gun body 12 through the inner thread and is installed on the outer side of the telescopic gun body 12. When the rotating push-pull ring 7 rotates, the telescopic gun body 12 is pushed forward and backward by the thread.The rotating push-pull ring 7 can also be integrated with the movable gun body 6 and be an integrally processed and formed component with the movable gun body 6.

[0027] The working principle of the present invention is: before welding, the rotating gun body 6 drives the rotating push-pull ring 7 to rotate, and the rotating push-pull ring 7 pushes the telescopic gun body 12 to move forward and backward through the thread, and the telescopic gun body 12 moves forward and backward to drive the telescopic ring 3 to move forward and backward, and the forward and backward movement of the telescopic ring 3 drives the clamping or opening of the movable clamping jaw 2 to achieve the effect of clamping the welding rod 1 or releasing the welding rod 1; during welding, the power drives the gun shaft 10 to rotate, and the gun shaft 10 drives the telescopic ring 3, the movable clamping jaw 2 and the welding rod 1 to rotate. During the process, the welding current is transmitted from the gun shaft 10 to the movable clamping jaw 2 and the welding rod 1, and finally transmitted to the product to generate an arc to achieve welding.

[0028] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A quick-clamping electric spark welding gun, characterized in that: The invention comprises a welding rod (1), a movable clamping jaw (2), a telescopic ring (3), a protective cover (4), a movable gun body (6), a rotating push-pull ring (7), a stop ring (8), a gun intermediate shell (9), a gun shaft (10), a telescopic gun body (12) and an intermediate 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 a telescopic ring (3) is arranged on the periphery of the movable clamping jaw (2), the telescopic ring (3) is installed on the front part of the telescopic gun body (12) through a connecting bearing (11), the gun shaft (10) is installed on the inner side of the intermediate 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 in the intermediate inner gun body (14). The outer side of the inner gun body (14), the movable gun body (6) is arranged on the rear end step circumference of the middle inner gun body (14), the outer side of the rear side of the movable gun body (6) is provided with a gun intermediate shell (9), the inner side of the movable gun body (6) is provided with a stop ring (8), the inner side of the movable gun body (6) is also provided with a rotating push-pull ring (7), the rotating push-pull ring (7) cooperates with the outer side thread of the telescopic gun body (12) through the inner thread, and is installed on the outer side of the telescopic gun body (12), the front part of the gun shaft (10) is provided with a movable clamping jaw (2), the front end of the gun shaft (10) is provided with a first convex ring (17), the first convex ring (17) cooperates with the inner groove (18) of the movable clamping jaw (2), the outer side of the movable clamping jaw (2) is a curved surface, and the front end and the end of the movable clamping jaw (2) are in a raised shape.

2. The quick-clamping electric spark cladding gun according to claim 1 is characterized in that: The movable clamping jaw (2) has a plurality of clamping petals.

3. The quick-clamping electric spark welding gun according to claim 1 is characterized in that: 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 connected to the outside.

4. The quick-clamping electric spark welding gun according to claim 1 is characterized in that: The middle inner gun body (14) is provided with a gas through hole connecting the air pipe and the outer space of the gun shaft.

5. The quick-clamping electric spark welding gun according to claim 1, characterized in that: The gun shaft (10) and the movable clamping jaw (2) are made of conductive materials.

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