JPH05329685A - Welding system - Google Patents

Abstract

PURPOSE:To complete a welding system with the reduced number of robots by travelling in a U-shape the welding robots in plural stations. CONSTITUTION:A work station 2 is arranged in a plural number along a carrier line 1, and simultaneously a welding robot 3 is installed in each work station 2. These robots 3 are operated along the rail 4 that is installed in a manner to enclose each work station 2. Then, a workpiece 5 is loaded on a pallet 6 and moved on the carrier line 1. At the work station 2, the robot 3 is moved along the rail 4, and welding is performed on the opposite side of the workpiece 5. Compared with the conventional arrangement in which robots themselves do not move around, the number of robots may be reduced. The workpiece 5 whose welding is completed is returned to the carrier line 1.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to welding systems.

[0002]

2. Description of the Related Art In a vehicle body production line, as shown in FIG. 4, welding robots b are arranged on both sides of a transfer line a to weld a work d sent to each work station c. I am giving it. However, since this manufacturing line requires two welding robots b for each work station c, the number of welding robots b increases, which causes a cost increase.

In view of such circumstances, it is an object of the present invention to provide a welding system that requires only one welding robot for each work station.

[0004]

According to the present invention for solving the above problems, a plurality of work stations are arranged along a work transfer line, and one welding robot is installed at each of the stations. Each of the robots is caused to travel in a U shape so as to surround the work station.

[0005]

EXAMPLE FIG. 2 shows the welding system of the present invention. In this system, a work station 2 is installed along the transfer line 1.
A plurality of welding robots 3 are arranged and one welding robot 3 is installed at each work station 2. These robots 3 travel along rails 4 installed so as to surround the work station 2 as shown in FIG.

Now, when the work 5 is sent to the front of the work station 2 at the left end in the figure, the work 5 is transferred from the pallet 6 to this station 2. Here, the welding robot 3 welds one side of the work 5 at the position shown. Then, it moves along the rail 4 to the opposite side of the rail 4 and welds the opposite side of the work 5. In some cases, welding may be performed during the movement. When the welding at the station 2 is completed, the work 5 is returned to the transfer line 1 and the same welding operation is repeated at the adjacent station.

When an overhead conveyor is used, the rail 4 may be arranged as shown in FIG.

[0008]

According to the present invention, since one welding robot is sufficient for each work station, the number of welding robots can be reduced, which is advantageous in cost.

[Brief description of drawings]

FIG. 1 is a diagram showing a work station in a welding system of the present invention.

FIG. 2 is a diagram showing the entire system.

FIG. 3 is a diagram showing a modified example of FIG.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Transport line 2 Work station 3 Welding robot 4 Rail 5 Work

Claims (1)

[Claims] 1. A plurality of work stations are arranged along a work transfer line, one welding robot is installed at each of the stations, and each robot has a U-shape so as to surround the work station. Welding system characterized by running.