JPH0780657A - Electrode fixing structure for spot welding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Positioning and fixing of fixed electrodes in indirect and series spot welding. It is possible to perform positioning and fixing at the same time. Furthermore, by exchanging templates, it is possible to handle various works. This is the purpose. [Structure] A template 4 is used for positioning and fixing a fixed electrode, a template positioning fixing bolt 5 for fixing the template 4, and an assembly jig for supporting and fixing them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode fixing structure for a spot welding device, and more particularly to an electrode fixing structure for a spot welding device suitable for joining works having different specifications by indirect welding or series welding. Is.

[0002]

2. Description of the Related Art In general, fixed electrodes (back electrodes) for indirect, series and multi-spots are directly or indirectly assembled and fixed on a jig by bolting.

The conventional fixing method is to fix it to the stall as described in the document "Labor Saving Welding Handbook" Sankaido Co., Ltd., December 10, 1976, page 38, dedicated automatic welding machine, back electrode. The structure is such that the electrode (insert electrode) is inserted and tightened with bolts to be fixed.

[0004]

In the above-mentioned conventional fixing structure, it is necessary to give sufficient consideration to the following points.
Since the fixed electrode is fixed by bolts, it is necessary to improve workability during attachment / detachment work and reduce man-hours involved in setup. Further, since the fixed electrode is fixed by bolting, it is difficult to deal with various works (models) and there is a tendency to use a dedicated jig, which requires a large jig manufacturing cost.

The present invention provides an electrode fixing structure for a spot welding apparatus that facilitates positioning and fixing of a fixed electrode to an assembly jig to shorten the attachment / detachment time, and is capable of responding quickly to various works. This is the purpose.

[0006]

[Means for Solving the Problems] A jig for positioning adjustment, tightening and fixing, etc. of a fixed electrode by a method of mounting a template on the upper surface of a jig and enabling positioning and fixing only by fitting a fixed electrode into the template. Aim to reduce the number of assembly steps. Further, by exchanging the template, various works can be dealt with, so that the jig manufacturing cost and the storage place can be reduced and the management can be facilitated.

[0007]

The template is integrated or divided according to the size of the work and is supported and fixed on the assembly jig. By fitting the fixed electrode into this template, positioning and fixing in the front-rear, left-right direction can be performed at the same time. Further, by increasing the thickness of the template or reducing the clearance between the opening and the fixed electrode, the positioning accuracy can be improved and the fixing can be made firm. Further, by exchanging the template, various works can be dealt with, and if the material is made of aluminum alloy or the like and the lightweight holes are provided, the workability at the time of handling is improved and the setup time can be shortened.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described based on. The indirect spot welding fixed electrode positioning and fixing structure according to the present invention comprises an assembly jig capable of handling various works and a template for simultaneously positioning and fixing the fixed electrode to the jig. There is.

FIG. 1 shows the structure of an assembling jig, which comprises a rigid base 1, a copper conductive plate 2 for energizing a work on the base 1 with little resistance, and a ground electrode 3. The base 1 and the conductive plate 2 are joined by a countersunk screw so as to be in close contact with each other, and a reference hole 12 and a tapping process 13 for positioning and fixing the template 4 are applied to them. Further, the ground electrode 3 is arranged on one end of the assembly jig, and is fastened together with the conductive plate 2 to the base 1 and serves as a terminal when electricity is applied. Reference numeral 7 is a movable electrode for energizing the ground electrode 3. Reference numeral 8 is a movable electrode for welding the work.

FIG. 2 shows the positioning and fixing procedure of the fixed electrode 6, and the template 4 in (c) is integrated or divided according to the size of the work, and the template 1 and the conductive plate 2 described above are used. It is positioned on the assembling jig and is fixed by the fixing bolt 5. The fixing hole 14 and the insertion hole 15 for positioning and fixing the various fixed electrodes 6 and the light-weight hole 16 in consideration of workability of the template 4 are machined. In addition, in the vicinity of the insertion hole 15, a matching mark such as the model name of the fixed electrode 6 and the insertion hole direction is displayed, and as the template 4 alone, the work name, the allocation position, etc. are clearly indicated in the center portion, Is designed so that the corresponding work can be easily grasped.

This template 4 is placed on the assembly jig shown in FIG. 1, and then the template 4 shown in FIG.
In order to perform accurate positioning and reliable fixing, the positioning and fixing are performed by the template fixing fixing bolt 5 provided with the tapered portion and the straight portion. Finally, Figure 2
The various fixed electrodes 6 shown in (a) are fitted into the insertion holes 15 of the template 4 on which the corresponding model name, insertion direction, etc. are displayed, and the positioning and fixing of the fixed electrodes 6 are completed.

When the work is changed, the template 4 can be replaced. FIG. 3 shows the fixed electrode 6 positioned and fixed by the procedure described in FIG.
FIG. 4 is a perspective view showing a state in which the work is set on the top, and a cross section thereof is shown in FIG.

Next, a second embodiment will be described below with reference to FIG. This drawing is a cross-sectional view showing a state in which the positioning and fixing of the fixed electrode 6 are completed, and the assembly jig has a rigid base 1, a template also serving as a conductive plate 4, and a conductive plate 2 made of copper for conducting electricity. And the ground electrode 3. The base 1 and the conductive plate 2 are attached so that their ends are flush with each other at the ends of the base 1 and are fastened together with the ground electrode 3, and the ground electrode 3 functions as a terminal when energized. ing. Further, the base 1 and the conductive plate 2 are provided with reference holes and taps for positioning and fixing the template 4.
The template 4 is positioned on the assembly jig described above, and fixing holes for fixing and inserting holes for fixing and fixing various fixed electrodes 6 are formed, and holes such as lightweight holes in consideration of handling workability of the template 4 are formed. The material is a copper alloy having a high electrical conductivity and also serves as a conductive plate. In the vicinity of the insertion hole, a matching mark such as the model name and insertion direction of the corresponding fixed electrode 6 among various fixed electrodes 6 is displayed so that workability at the time of positioning and fixing is considered. The fixed electrode 6 differs from that of the first embodiment in that the template 4
The fitting plate for fitting, positioning and fixing by fitting in and the conducting plate provided with the contact part for conducting electricity are integrally configured, and the fixing method and procedure are the same as in the first embodiment.

A third embodiment will be described with reference to FIG. This drawing is a cross section showing a state in which positioning and fixing of the fixed electrode 6 are completed, and the assembly jig has a rigid base 1 and a copper conductor plate 2 for conducting electricity to the fixed electrode 6, a cable 9, and a ground. It consists of electrodes 3. The narrow conductive plate 2 and the ground electrode 3 are fastened together at the end portion on the base 1 and serve as terminals during energization.

These assembling jigs are provided with screw holes for positioning and fixing the template 4, mounting holes for mounting the cable 9 for conducting to the fixed electrode 6, and tap processing, and function as terminals when energized. Are doing

The template 4 has the same concept as that of the first embodiment, and the fixed electrode 6 is provided with tap holes for attaching the cable 9 connected from above the conducting plate 2, so that the template 4 can be positioned. After being fixed, it is connected with the hexagon bolt 10 and is energized. The present embodiment is an example applied to a work that can be handled by a small number of fixed electrodes 6.

As described above, according to the first to third embodiments, there are the following advantages. The template 4 processed by the NC turret punch press or the like enables high-precision positioning and fixing of the fixed electrode in a short time. By exchanging the template 4, it is possible to deal with various works and standardize the work. Therefore, according to the above configuration, it is possible to provide a work assembled with high accuracy, with the advantage of reducing the number of jig assembling steps including positioning and fixing. Further, by exchanging the template 4 on the same jig, various works can be dealt with, and there is an advantage that the manufacturing cost of the dedicated jig and the like and the storage place can be reduced and management can be facilitated.

[0018]

According to the present invention, since the fixed electrode is fixed by the method of fitting into the template, positioning and fixing can be performed at the same time, and there are effects such as shortening of jig assembly time and highly accurate positioning of the electrode. In addition, since the work method can be standardized, it is possible to eliminate the skill difference between the workers and improve efficiency and reliability.

[Brief description of drawings]

FIG. 1 is a perspective view of an assembly jig including a first embodiment of an electrode fixing structure of the present invention.

FIG. 2 is a perspective view showing a positioning and fixing state in the first embodiment of the electrode fixing structure of the present invention.

FIG. 3 is a perspective view showing a state in which a work is set on the first embodiment of the electrode fixing structure of the present invention.

FIG. 4 is a cross-sectional view showing the work set state of FIG.

FIG. 5 is a sectional view showing a second embodiment of the electrode fixing structure according to the present invention.

FIG. 6 is a sectional view showing a third embodiment of the electrode fixing structure according to the present invention.

[Explanation of symbols]

1 ... Base, 2 ... Conductive plate, 3 ... Ground electrode, 4 ... Template, 5 ... Fixing bolt, 6 ... Fixed electrode, 9 ... Cable,
14 ... fixing hole, 15 ... insertion hole, 16 ... lightweight hole.

Claims (1)

[Claims] 1. An electrode fixing structure of a spot welding apparatus, wherein a fixed electrode is installed in a work welding position on a base so as to be conductive, and a work is placed on the fixed electrode and welding is performed by a movable electrode. A template that is divided and configured corresponding to each welding position of the work and has an insertion hole into which each fixed electrode can be fitted corresponding to the welding position of the work is electrically conductive to each fixed electrode on the base. An electrode fixing device for a spot welding device, which is installed as much as possible.