JPS58209483A - Stud welding method and device directly used for applying said method - Google Patents

Abstract

PURPOSE:To prevent sparking and scattering of arcs with welding, the generation of noise, etc. with an inexpensive and simple device by covering the spacing between the forward end of a wleding gun which performs stud welding and a base material with a hollow cylindrical wall and performing welding in a closed atmosphere. CONSTITUTION:A heat resistant member 2 of a glass fiber material or the like is mounted on the inside circumferential surface of a hollow cylindrical body 1 consisting of an electrically insulating material such as, preferably a rigid plastic material or the like to constitute a device; further three guide leg parts 7 which determine the bottom end position of said device are mounted by means of screws 6 to the outside circumferential part in the lower part of the body 1. Such device is mounted by means of a fixing member 8 to a welding gun 9 mounted with a stud 10 to be welded. The forward end of said device is positioned roughly flush with the forward end of the stud 10 so that the welding of the stud 10 and a base material 11 is accomplished in the substantially closed atmosphere enclosed with the gun 9, the device 1, the material 1, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stand welding method and an apparatus directly used for carrying out the method.

For example, stand welding using a type 11 capacitor welding device or an arc welding device, which consists of a welding device body and a welding gun, is widely used in various fields due to its simplicity and workability. It is becoming more and more common. In this type of welding method, a welding current is passed between the stand attached to the welding gun and the base metal to generate an arc, so sparks and molten metal scattering cannot be avoided. 8. If there are flammable materials around the work site or if one worker has to work overhead, for example when welding a stand to a ceiling, etc., there is a risk of fire or burns to the worker. There is. In addition, special instructions and supervision are provided to ensure that no arc or sparks are generated during stand welding work in an environment where flammable materials are present.

Furthermore, this rice welding method generates considerable noise when arcing occurs between the stand and the base metal.

This tendency is particularly noticeable when working indoors.

An object of the present invention is to provide a novel stand welding method that can prevent the scattering of sparks and arcs as well as the noise generated during stand welding as described above.For this purpose, the method according to the present invention Stud welding is performed in a substantially closed atmosphere by covering the space between the tip of the welding gun and the base material to be welded with a heat-resistant and sound-insulating member.

The invention therefore also provides a device for direct use in carrying out the above method, the device being adapted to be attached at one end to a welding gun and at the other end to a welding device attached to the welding gun. It is made up of a hollow cylindrical body that extends to approximately the same plane as the tip of the stand, and has a heat-resistant member applied to at least a portion of its inner peripheral surface. Preferably, the hollow cylindrical body may be constructed of an electrically insulating material, such as a hard plastic material, and the heat resistant member may preferably be comprised of a glass fiber material.

As described above, according to the present invention, by changing the conventional open type welding method to a closed type, the arc, sparks, and noise during discharge of the welding current can be preserved and confined within the member. Not only can stand-up welding be performed safely in areas where heat-generating materials are present or on ceilings, but it also prevents sudden atmospheric flow and molten metal from scattering, ensuring reliable welding and maintaining the welding temperature. It can also reduce noise even in closed work sites, such as indoors.
It is possible to prevent adverse effects on workers and surrounding people.

In addition, the device of this invention has a simple structure and can be used repeatedly, and can be used without substantially changing existing welding guns, making it extremely practical in terms of cost and usability. It can be used semi-permanently by configuring the device so that the sexual members can be replaced. Further, by changing the position of attachment to the welding gun depending on the length of the stand used, it can be easily applied to stands of various lengths. Furthermore, since the tip of the welding gun and the area around the stand are electrically insulated and shielded, dangers such as electric shock due to erroneous operation can be prevented.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2 show an embodiment of the device according to the present invention,
l is a hollow cylindrical body which may be made of a suitable hard plastic material and whose inner surface is provided with a heat-resistant material λ. The lower end of this heat-resistant material terminates in front of the lower end of the hollow cylindrical body l, as shown in partial cross section in FIG.
The wall is thin so as to form a recess 3 between the two. The cover member is made of a glass fiber material that covers the lower edge of the heat-resistant material, one end of which extends upward along the inner peripheral surface of the heat-resistant material, and the other end of which is housed in the recess 3. And the zipper! Fixed by Further, in the illustrated embodiment, three guide legs 7 for positioning are attached to the lower outer periphery of the hollow cylindrical body l by screws O.
The lower end of each guide leg 7 is bent outwardly to define the lower end of the device. The upper end of the hollow cylindrical main body l is formed in a taper shape, and a fixing member r is attached thereto. The dimensions of each part of the mounting part constructed in this way can be arbitrarily designed depending on the welding gun used and the dimensions of the stand to be welded.

FIG. 3 shows a state in which the apparatus shown in FIGS. 1 and 1 is attached to the welding gun 2. Fig. 3 also shows the stud 10 to be welded mounted on the welding machine, and as is clear from this figure, the tip of the device is located on the same plane as the tip of the stud 10, that is, on the surface of the base material //. As a result, the stand io is substantially surrounded by the surface portion of the base material to be welded, the inner wall of the device, and the tip of the welding gun 2. In this case, the attachment position of the device to the welding gun 2 may be changed depending on the dimensions of the stand, or the device itself may be sized in accordance with the length of the stand to be welded.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an embodiment of the device according to the present invention, FIG. 2 is a top view of the device shown in FIG. 1, and FIG. 3 shows the device shown in FIGS. FIG. In the figure, /: hollow cylindrical body, 2. ≠: Heat resistant material, ri:
Welding gun, 10: stand, /l: base metal. Jyojo on the x side (no change in content) Figure 1, 3rd grade school procedure amendment (method) 1. Indication of the case 1982 Patent application No. E19938 2, name of invention Relationship to the case Patent applicant address 8-10 Denenchofu Minami, Ota-ku, Tokyo Name
Nippon Drive India Co., Ltd. 4, Agent 105 Address Bussan Building Annex, 1-15 Nishi-Shinbashi, Minato-ku, Tokyo Telephone (591) 02611, Drawing 2, Power of attorney

Claims (1)

[Claims] 1. Attach the stand to be welded to the welding gun. In a method of welding a stand by discharging welding current between the stand and the base metal to generate an arc. A stand welding method characterized in that the stand welding is performed in a substantially closed atmosphere by covering the space between the tip of a welding gun and the base material to be welded. 2 Consisting of a hollow cylindrical body whose one end can be attached to a welding gun and whose other end extends to approximately the same plane as the tip of the stand to be welded attached to the welding gun, and at least a portion of its inner peripheral surface is made of a heat-resistant member. A device used for stand welding that is characterized by being subjected to. 3. The device according to claim 12a, wherein the hollow cylindrical body is made of an electrically insulating material, such as a hard plastic material, and its inner circumferential surface is fitted with a glass fiber material.