JPH0238311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stud welding jig.

Stud welding using, for example, capacitor discharge welding equipment or arc welding equipment, which consists of a welding equipment body and a welding gun, has become widely used in various fields due to its simplicity and workability. I'm getting used to it. By the way, in this type of welding method, a welding current is passed between the stud attached to the welding gun and the base metal to generate an arc, so the phenomenon of sparks and molten metal scattering cannot be avoided. This means that if there are flammable objects around the work site or if workers have to work overhead, for example when welding studs to ceilings, there is a risk of fire or burns to the workers. There is. Also, stud welding operations in environments where combustible materials are present must be instructed and supervised to prevent arcing and sparks from scattering.

Furthermore, in this type of welding method, considerable noise is generated when an arc occurs between the stud and the base metal, and this tendency is particularly noticeable when working indoors.

An object of the present invention is to provide a new stud welding jig that can prevent the scattering of sparks and arcs and the noise generated during stud welding as described above.

In order to achieve this object, the stud welding jig according to the invention is adapted to be attached at one end to a welding gun, and at the other end to an electric conductor which extends approximately in the same plane as the tip of the stud to be welded which is attached to the welding gun. It has an insulating hollow cylindrical body and a guide leg for positioning attached to the lower part of the outer periphery of the hollow cylindrical body, and the inner peripheral surface of the hollow cylindrical body is coated with a heat-resistant material. , the lower edge of this heat-resistant material is covered with a cover member made of glass fiber material.

As described above, according to the present invention, by changing what was conventionally an open type to a closed type,
The arc, sparks, and noise generated when the welding current is discharged can be confined within the cover material, making it possible not only to perform stud welding safely in areas where combustible materials are present or on ceilings, but also to reduce the atmosphere. It can prevent sudden flow of molten metal and scattering of molten metal, ensuring reliable welding, and can also reduce noise even when working in closed work sites, such as indoors, to prevent negative effects on workers and surrounding people. be able to.

Furthermore, the device of the present invention has a simple structure, 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 attachment position to the welding gun depending on the length of the stud used, it can be easily applied to studs of various lengths. Furthermore, since the tip of the welding gun and the area around the stud are electrically insulated and protected, 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 invention, 1 being a hollow cylindrical body which may be made of a suitable hard plastic material, the inner surface of which is provided with a heat-resistant material 2. FIG. The lower end of this heat-resistant material 2 terminates before the lower end of the hollow cylindrical body 1, as shown in a partial cross section in FIG. The wall is thin so as to form a recess 3 in between. 4
is a cover member made of a glass fiber material that covers the lower edge of the heat-resistant material 2 and has one end extending upward along the inner circumferential surface of the heat-resistant material 2 and the other end being accommodated in the recess 3. It is fixed by a fastener 5. Further, in the illustrated embodiment, three guide legs 7 for positioning are attached to the lower outer circumference of the hollow cylindrical body 1 by screws 6, and the lower end of each guide leg 7 is bent outward. The lower end position of this device is determined. The upper end of the hollow cylindrical body 1 is formed into a tapered shape, and a fixing member 8 is attached thereto. The dimensions of each part of the apparatus thus constructed can be arbitrarily designed depending on the welding gun used and the dimensions of the studs to be welded.

Figure 3 shows the equipment shown in Figures 1 and 2 with a welding gun 9.
Shown is the state in which it is installed. FIG. 3 also shows the stud 10 to be welded attached to the welding gun 9, and as is clear from this figure, the tip of the device is attached to the stud 1.
0, that is, on the surface of the base material 11, so that the stud 10 is substantially located on the surface of the base material 11 to be welded, the inner wall of the device, and the tip of the welding gun 9. will be surrounded by. In this case, the mounting position of the device relative to the welding gun 9 may be changed depending on the dimensions of the stud, or the device itself may be sized in accordance with the length of the stud to be welded.

[Brief explanation of drawings]

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, 1: hollow cylindrical body, 2, 4: heat-resistant member, 9: welding gun, 10: stud, 11: base material.

Claims (1)

[Claims] 1. An electrically insulating 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 stud to be welded which is attached to the welding gun, and the outer periphery of this hollow cylindrical body. A heat-resistant material is applied to the inner peripheral surface of the hollow cylindrical body, and a lower edge of the heat-resistant material is covered with a covering member made of glass fiber material. A stud welding jig characterized by being covered with.