KR0128014B1 - Collet for welding torch - Google Patents

Abstract

The collet for fixing a welding rod having a body, a penetrated hole, a space and an elastic piece is disclosed. The body is cylinder type having corn tip. The penetrated hole is in center part between the tip and rear end of said body. The space is formed inside from said tip. The elastic piece is springed toward said space and is formed by cut parts more than 2. Thereby, it is not possible to be affected by high heat generating during welding and thus there is no heat deformation.

Description

Weld Torch Collet

1 is a perspective view of a collet for a welding torch according to an embodiment of the present invention;

2 is a longitudinal sectional view taken along the line I-I of FIG. 1,

3 is a plan sectional view taken along the line II-II of FIG.

4 is a state of use of the welding torch collet according to an embodiment of the present invention,

5 is a perspective view of a welding torch collet according to another embodiment of the present invention;

6 is a longitudinal sectional view taken along line III-III of FIG. 5,

7 is a plan sectional view taken along line IV-IV of FIG. 6,

8 is a view showing an example of the use of a conventional collet for welding torch.

* Explanation of symbols for main parts of the drawings

10,10a: collet body 11: conical part

12: through hole 14: annular indentation

15: cutting line 16: elastic piece

18: Guideman

The present invention relates to a collet for fixing a welding rod used to firmly fix a tungsten welding rod provided for TUNGSTEN INERT GAS WELDING, and in particular, the appearance structure is improved so that deformation due to high welding temperature is hardly generated. It relates to a welding rod fixing collet. In general, the collet is integrally coupled to the TIG welding torch to support the welding rod provided for the welding operation. An example of the conventional structure thereof is shown in FIG. As shown in the drawing, the TIG welding torch is detachably screwed into the welding torch main body 2 having the handle 1 integrally with the main body 2 and the front and rear portions of the main body 2. It consists of the nozzle 3 and the cap 4 which exist. The welding rod 5 is positioned to penetrate the through hole 6 formed in such a manner that the main body 2, the nozzle 3, and the cap 4 are in communication with each other, and the welding rod 5 is disposed in the through hole 6. ) Is provided with a detachable collet 7. The collet 7 only needs to be able to hold the welding rod 5 firmly. However, the collet 7 has a long shape in which the collet 7 is adjacent to the tip portion of the nozzle 3 of the TIG welding torch. Therefore, the high temperature (approximately 1500 to 2000 ° C.) generated during the welding operation by the welding rod 5 easily reaches the collet 7 positioned adjacent to the nozzle 3, and the collet 7 is caused by the heat at this time. Distortion deformation occurs. In particular, since the collet 7 is generally made of copper, the warpage deformation due to high heat is performed at a higher speed, resulting in a shorter lifespan, which is necessary to frequently replace the collet 7 with a new one. This is accompanied by inconvenience and uneconomics. In addition, the deformation of the collet 7 during welding weakens the rigidity of the welding rod, which causes a blow hole or a slag to be mixed in the welding area, thereby degrading the quality. SUMMARY OF THE INVENTION An object of the present invention is to provide a welding rod fixing collet by eliminating the above-mentioned defects and improving the external structure to support the welding rod in a state located far from the welding torch nozzle. Is in. A feature of the present invention for achieving the above object is a welding rod fixing collet which is installed in a welding torch having a nozzle and configured to fix a welding rod positioned to penetrate the torch and the nozzle, wherein the welding rod is located at a distance from the nozzle. It is formed of a short cylinder having a through hole, at least one end of the collet body formed a cone portion and the cutting portion provided at a predetermined distance from the cone portion to elastically support the welding rod inserted into the hole of the collet body The welding rod fixing collet comprising at least two elastic pieces formed by. Further, another feature of the present invention is a welding rod fixing collet which is installed in a welding torch having a nozzle and configured to fix a welding rod positioned to penetrate the torch and the nozzle, wherein the welding rod supporting hole is provided at one end. It is formed of a short cylinder having a wide space therein, and at the end where the hole is located, a collet body having a cone portion and a welding rod inserted in the hole of the collet body are elastically supported at a predetermined distance from the cone portion. The welding rod fixing collet comprising at least two elastic pieces formed by the cut portion provided. It is more preferable to install a groove recessed inwardly in a predetermined position of the collet body in order to smoothly flow the welding gas. Hereinafter, preferred embodiments of a welding rod fixing collet according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view along the line I-I of FIG. 1, and FIG. 3 is a plan sectional view along the line II-II of FIG. will be. As shown in the drawing, the collet according to the present invention has a cylindrical body 10 having a short length by having a through hole 12 supporting a welding rod, which will be described later. At least one end of the body 10 forms a cone portion 11. The formation of the conical portion 11 is to be more closely coupled to the through hole provided in the torch as described in FIG. At least two or more elastic pieces 16 are formed from the conical part 11 by cutting lines 15 provided along the longitudinal direction of the body 10. At least two of the cutting lines 15 are preferably formed longer than the other. The reason for this is to allow the welding gas to flow more smoothly toward the nozzle of the welding torch described later through the elongated incision lines 15. The length of the cutting line 15 may all be longer, but preferably different lengths for maintaining the strength of the body 10. In the above embodiment, the four elastic pieces 16 are formed, but may be more than that. The end portion of the cutting line 15 is provided with an annular recess 14 provided to be deeply dug along the entire circumference of the body 10. The annular inlet portion 14 provides a flow path that allows the supplied welding gas to be quickly supplied to the nozzle of the welding torch described later through the cutting line 15 and the through hole 12. 4 is a diagram illustrating a state of use of the collet, and the same parts as those of the above-described FIG. 8 are denoted by the same reference numerals in order to avoid duplicate explanation. The collet is located in the torch body 2 remote from the weld torch nozzle 3. Preferably, the welding gas supply hose (H) is preferably positioned at the site where the gas is introduced. The method of positioning the collet inside the welding torch body 2 is carried out with the cap 4 separated. When the cap 4 is fastened again, the elastic pieces 16 of the collet body 10 are contracted by the pressure applied from the cap 4. Thereby, the welding rod 5 positioned inside is firmly clamped and fixed. Due to this coupling structure, even if the welding rod 5 is provided for the welding operation, since the collet body 10 is located at a distance from the nozzle 3, it is not affected by the high heat generated during the welding operation. Therefore, the collet body 10 has no distortion due to high heat and once installed there is an effect that can be used almost permanently. In addition, since the welding rod 5 is firmly supported and provided to the welding operation at all times, there is an effect that welding defects (blow hole and slag incorporation) generated when using the conventional (first degree) collet are eliminated. In addition, the concave inlet portion 14 formed on the collet body 10 and the cutting portion 15 successively connected to the welding argon gas introduced through the hose H are quickly flowed to the nozzle 3 to effectively conduct the welding operation. To be able. 5 is a perspective view of a welding rod support collet according to another embodiment of the present invention, FIG. 6 is a longitudinal cross-sectional view taken along line III-III of FIG. 5, and FIG. 7 is taken along line IV-IV of FIG. The planar cross-sectional views are respectively shown. The same parts as in the above embodiment are denoted by the same reference numerals to avoid redundant description. Unlike the above embodiment, a wider through hole 12 is formed inside the collet body 10a, and guide holes 18 are formed at a predetermined interval in the circumferential direction as the main wall. This is to allow the argon, which is a welding gas, to flow more smoothly toward the welding nozzle. Although the through hole 12 is formed to be wide, the conical part 11 is formed to be narrow to have a diameter corresponding to the electrode, so that there is no major obstacle in supporting the electrode. In addition, the configuration and operation and effect are the same as the above embodiment, and a detailed description thereof will be omitted. As described above, according to the present invention, the collet is improved in appearance so that the welding torch can be firmly supported while being positioned at a distance of the welding torch nozzle. Thereby, there is no economical deformation that can be used almost permanently once installed because there is no heat deformation such as warping because it is not affected by high heat generated during welding. In addition, there is no welding defects such as blow holes and slag mixing because the welding rod is firmly fixed in the first state, thereby obtaining a good product.

Claims (4)

A welding rod fixing collet for fixing a welding rod penetrating a torch and a nozzle installed in a welding torch having a nozzle, comprising: a body extending from a rear end to a cylinder to form a cone at a front end; A through hole passing through the center portion between the front end portion and the rear end portion; A space portion formed inward from the front end by a predetermined length; And an elastic piece formed by a cutting part cut at least two from the tip part so as to be shot toward the space part. Welding rod fixing collet, characterized in that it comprises a. The welding rod fixing collet according to claim 1, further comprising a concave inlet for welding gas induction formed along the circumference of the body to the rear end of the outer circumferential surface of the body. According to claim 1, Body from the rear end to the front end to form a whole space; A through hole formed at the front end of the body; Several cut portions formed along the outer circumferential surface of the through hole; And an arc-shaped elastic surface that starts wide at the inner circumferential surface of the through hole and gradually tapers to the outer circumferential surface of the body. Welding rod fixing collet comprising a. 4. The welding rod fixing collet of claim 3, further comprising guide holes formed at regular intervals along the outer circumferential surface of the body to guide the welding gas.