CN116275409A - Welding end isolation protection device for stud welding torch and stud welding torch - Google Patents

Abstract

The invention belongs to the field of automobile industry, and discloses a welding end isolation protection device of a stud welding gun and the stud welding gun using the positioning pin. Through setting up the safety cover after the improvement outside the double-screw bolt welding dop for can effectively prevent welding slag and welding light and leak when welding, play work protection effect. The device is small and simple, can be realized by small modification on the existing common welding gun, belongs to a pure mechanical device, has action dependent on spring force, does not need energy supply, is convenient to repair and maintain, and is suitable for a stud welding process.

Description

Welding end isolation protection device for stud welding torch and stud welding torch

technical field

The invention belongs to the field of automobile industry, and specifically discloses a welding end isolation protection device of a stud welding torch and a stud welding torch using the welding end isolation protection device.

Background technique

In order to protect the chuck of the stud welding gun from being damaged during welding without screws, the chuck is generally equipped with a chuck protection sleeve, so that the chuck is inside the chuck protection sleeve, but the chuck is clamped The bolts to be welded protrude out of the protective sleeve of the chuck, which is convenient for arc ignition to complete welding, which means that the welding light and spattered welding slag are not shielded in any way.

In the welding workshop of the automobile manufacturing plant, the automatic stud welding will produce dazzling welding light and welding slag splash during the process of welding studs for the plate, which will have a negative impact on the workers and the environment. How to complete the welding work with normal arc ignition It is an urgent problem for those skilled in the art to take isolation measures to deal with welding light and spatter.

Contents of the invention

In order to solve the problems in the background technology, the invention provides a welding end isolation protection device of a stud welding torch, and the specific technical scheme is as follows:

A welding end isolation and protection device for a stud welding gun, comprising: a limit nut, a spring whose upper end abuts against the lower end surface of the limit nut, a cylindrical chuck protective sleeve and a barrel fixed around the stud welding chuck Shaped welding light protection cover;

The outer wall of the upper end of the cylindrical chuck protective sleeve is screwed to the limit nut, and the height of the lower end surface of the cylindrical chuck protective sleeve is located between the clamping end of the stud welding chuck and the stud welding end;

The cylindrical welding light protection sleeve is fitted outside the cylindrical chuck protective sleeve through a clearance fit; the spring is sleeved outside the cylindrical chuck protective sleeve, and the lower end of the spring is welded to the cylindrical chuck. The upper end surface of the light protection sleeve abuts; when the spring elongation is minimum, the lower end surface of the cylindrical welding light protection sleeve is higher than the lower end surface of the cylindrical chuck protection sleeve; the cylindrical chuck protection sleeve The outer wall of the cylindrical welding light protection sleeve and the inner wall of the cylindrical welding light protection sleeve are provided with a contact-type limit structure that cooperates with each other. Lower by at least arc starting distance.

Preferably, the cylindrical outer wall of the cylindrical chuck protective sleeve is in the form of a stepped shaft, and the cylindrical inner wall of the cylindrical welding light protection sleeve is in the form of a stepped hole; the stepped surface of the stepped shaft faces upward, so The stepped face of the stepped hole faces downwards, constituting the contact position-limiting structure.

Preferably, the tubular chuck protective sleeve and the cylindrical welding flash protective sleeve are both cylindrical in shape.

Preferably, the cylindrical welding light protection sheath is made of ceramics.

The present invention also provides a stud welding torch, which includes the above-mentioned isolation protection device for the welding end of the stud welding torch.

Compared with prior art, the present invention produces following beneficial effect:

Through the simple spring and limit setting, it can effectively prevent the leakage of welding slag and welding light under the condition of meeting the requirements of normal welding process, and has the effect of labor protection.

The device is small and simple, and can be realized by making a small modification on the existing ordinary welding torch. It is a purely mechanical device, and its action depends on the spring force. It does not need energy supply and is easy to maintain.

Description of drawings

Figure 1 is a disassembled view of the welding end isolation protection device in the embodiment of the present invention;

Fig. 2 is the assembly diagram of the welding end isolation protection device in the embodiment of the present invention;

In the figure: 1. stud welding torch body; 2. stud welding chuck; 3. stud; 4. limit nut; 5. spring;

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on this embodiment, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

As shown in Figure 1-2, the welding end isolation and protection device of the stud welding torch of the present embodiment includes: a limit nut 4, a spring 5, a cylindrical chuck protection sleeve 6 and a welding light protection sleeve 7 (that is, the content of the invention The cylindrical chuck protection sleeve and the cylindrical welding light protection sleeve in the middle).

The chuck protective sleeve 6 is set on the stud welding chuck 2, the inner wall of the upper end is screwed with the stud welding torch body 1 fixing the stud welding chuck 2, and the outer wall of the upper end is screwed with the limit nut 4, and the chuck is protected after being installed in place. The lower end surface of the sleeve 6 is lower than the clamping end of the stud welding chuck 2, but higher than the welding end of the clamped stud 3.

The welding light protective cover 7 is made of ceramics, and fits outside the chuck protective sleeve 6 through clearance fit; the spring 5 fits outside the chuck protective sleeve 6, and the upper end contacts with the lower end surface of the limit nut 4, and the lower end contacts with the lower end surface of the stop nut 4. The upper end surface of the welding light protection sleeve 7 is in contact; when the elongation of the spring 5 is the smallest, the lower end surface of the welding light protection sleeve 7 is higher than the lower end surface of the chuck protection sleeve 6; the cylindrical outer wall of the chuck protection sleeve 6 is a stepped shaft The type of the type, the cylindrical inner wall of the welding light protection cover 7 is the type of stepped hole; the step of the stepped shaft faces up, and the step of the stepped hole faces down, forming a contact limit structure to ensure that when the spring 5 elongates to the maximum , the lower end surface of the welding light protection cover 7 is at least 1 arc starting distance lower than the welding end of the stud 3 . It should be added that the contact-type limiting structure is not limited to the type of the above-mentioned two opposite annular step surfaces, and may also be other types such as boss-to-top or chute-to-slider.

When the stud welding torch body 1 reaches the preset welding point, the stud welding torch body 1 approaches the parent part to be welded downward, and the welding light protection cover 7 contacts the parent part first, thereby compressing the spring 5 until the stud 3 The welding end reaches the correct welding position. At this time, the welding light protection cover 7 covers the entire stud welding chuck 2 and the stud 3, and the stud welding starts welding. There is no welding light dazzling, and the welding slag is no longer leaked out; After the monitoring welding is completed under the safety protection, the welding light protection cover 7 is out of contact with the parent part, and the welding light protection cover 7 returns to the non-working state under the effect of the spring force, and is ready to enter the next welding cycle.

The welding end isolation protection device of this stud welding torch is installed on the ordinary stud welding torch, which is used to prevent light pollution and welding slag splashing during welding. The welding end of the welding torch is isolated from the stud welding torch of the guard.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. The utility model provides a welding end isolation protection device of double-screw bolt welder which characterized in that includes: the welding head comprises a limiting nut (4), a spring (5) with the upper end abutting against the lower end face of the limiting nut (4), a cylindrical chuck protective sleeve (6) and a cylindrical welding light protective sleeve (7) which are fixed around the stud welding chuck (2);

the outer wall of the upper end of the cylindrical clamping head protective sleeve (6) is in threaded connection with the limit nut (4), and the height of the lower end surface of the cylindrical clamping head protective sleeve (6) is positioned between the clamping end of the stud welding clamping head (2) and the welding end of the stud (3);

the cylindrical welding light protection sleeve (7) is sleeved outside the cylindrical clamping head protection sleeve (6) in a clearance fit mode; the spring (5) is sleeved outside the cylindrical chuck protective sleeve (6), and the lower end of the spring (5) is abutted with the upper end face of the cylindrical welding light protective sleeve (7); when the elongation of the spring (5) is minimum, the lower end face of the cylindrical welding light protection sleeve (7) is higher than the lower end face of the cylindrical clamping head protection sleeve (6); the outer wall of the cylindrical chuck protective sleeve (6) and the inner wall of the cylindrical welding light protective sleeve (7) are provided with contact limiting structures which are matched with each other, and when the elongation of the spring (5) is maximum, the lower end face of the cylindrical welding light protective sleeve (7) is lower than the welding end of the stud (3) by at least 1 arcing distance.

2. The welding end isolation protection device of a stud welding gun according to claim 1, wherein: the cylindrical outer wall of the cylindrical chuck protective sleeve (6) is in a stepped shaft shape, and the cylindrical inner wall of the cylindrical welding light protective sleeve (7) is in a stepped hole shape; the step surface of the stepped shaft faces upwards, and the step surface of the stepped hole faces downwards, so that the contact type limiting structure is formed.

3. The welding end isolation protection device of a stud welding gun according to claim 2, wherein: the cylindrical clamping head protecting sleeve (6) and the cylindrical welding light protecting sleeve (7) are cylindrical.

4. The welding end isolation protection device of a stud welding gun according to claim 3, wherein: the cylindrical welding light protection sleeve (7) is made of ceramic.

5. A stud welding gun, characterized by: a weld end isolation protection device comprising a stud welding gun as defined in any one of claims 1-4.

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