JPH01224174A - Welding equipment for vehicle - Google Patents

Abstract

PURPOSE:To improve welding workability by fixing a couple of works from between the couple of works to weld the couple of works at the same time. CONSTITUTION:The couple of front wheel houses W1 and W1 are set on a setting jig on a truck 1 at a setting station S1. The truck 1 is moved and carried in a station S2 and the house W1 whose tack-welding and additional welding are finished at the station S2 is once lifted above by a lifting device. During this time, the truck 1 returns to the left and a new house W1 is set on the setting jig on the truck 1 of the left side. During this time, the house W1 which is lifted above and whose tack-welding and additional welding are finished is again set on the setting jig on the truck 1 of the right side by falling of the lifting device. The truck 1 is moved to the right and a house W1 set newly on the setting jig of the left side is carried in the station S2 and the house W1 set on the jig of the right side is carried and welded to a bulkhead W2 and a board W3 by integrated welding equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for welding a pair of left and right works, such as a front wheel house, among works constituting a vehicle body.

(Prior Art) As a welding device for vehicles, one disclosed in Japanese Patent Application Laid-Open No. 59-39481 is known. This device has a preset jig attached to the welding device, and while the welding device is welding the work, the next work to be welded is set on the preset jig, reducing cycle time. .

(Problems to be Solved by the Invention) According to the conventional device described above, the cycle time can be shortened for a single workpiece, but problems remain when considering the entire vehicle body. In other words, with conventional equipment, even if the left and right workpieces are a pair, they are welded separately without any relationship. For example, in the case of left and right front wheel houses, tack welding and additional welding are performed separately, and then welding is performed separately. Since the workpieces are transported to a comprehensive welding device for welding with other workpieces, there is waste in terms of space and layout, and there are also problems in logistics, such as difficulty in automating and improving productivity. .

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a welding device on both sides of a setting jig for setting a pair of left and right workpieces, and a pair of workpieces is completed in the setting jig. A positioning clamp device is provided to fix the workpiece at a gap substantially equal to the state of the vehicle, and the workpiece is fixed from the center side of the vehicle body by the positioning clamp device.

(Function) Since the pair of workpieces is fixed from the center side of the vehicle body, that is, from between the pair of workpieces, it is possible to weld the pair of workpieces at the same time.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

Fig. 1 is a plan view of an assembly device for the front part of a vehicle body using a welding device according to the present invention, and Fig. 2 is a front view of the same device. An additional welding station S2, a transfer station S3, and a general welding station S4 are arranged, and a mutually connected cart 1.1 is movably provided between the set station S1 and the additional welding station S2.
Set jigs 2, 2 are replaceably provided on the trolley 1.1, and a pair of left and right front wheel houses Wl, Wl are attached to these set jigs 2.2 with a gap approximately equal to the gap between the left and right front wheel houses in the completed vehicle body. That's how I set it.

In addition, the tack welding station S2 has a welding robot 3.3 for tack welding and a welding robot 4.4 for additional welding set in the setting jig 2 corresponding to the front wheel houses Wl and Wl. Lifting devices 5 are disposed on both sides and are attached to the frame 6 to lift the front wheel house W1, which has been tacked and added, upward and put it on standby.

The transport station S3 is provided with a transport device.

In this conveying device, a rail 8 is constructed between the upper part of the delivery position located downstream of the additional welding station S2 and the upper part of the general welding robot 7, and a traveling body 9 is engaged with this rail 8, An elevating body 10 that moves up and down with a cylinder unit is attached to the body 9, and a chucking unit 11 for gripping the front wheel house W1 is provided on the elevating body 10.

Further, as shown in FIG. 1, the front wheel house W1 is connected to the general welding station S4 via the conveyance path 12.
The bulkhead W2 and the dash board W3 to be welded are brought in.

Next, the setting jig 2.2 will be described based on FIGS. 13 to 5. Incidentally, since the setting jigs 2, 2 are respectively provided on each carriage 1.1, only one of the setting jigs 2 will be explained.

The setting jig 2 has a support 21 erected on a base 20,
Positioning pins 22 for rough positioning and cylinder units 23 are attached to these supports 21, and the clamp claws 2 are attached to the cylinder units 23.
Further, in this embodiment, a positioning and clamping device 25 is provided that simultaneously accurately positions and clamps the front wheel house W1. Then, the above-mentioned pillar 21, positioning pin 22,
The cylinder unit 23, the clamp claw 24, and the positioning clamp device 25 are all provided at positions where they do not interfere with the work of the welding robot 3 for temporary welding and the welding robot 40 for additional welding. In other words, each of the above members is positioned approximately inside the front wheel house W1,
The front wheel house W1 is fixed from the center side of the vehicle body.

Here, as shown in FIG. 5, the positioning clamp device 25 has a cylinder unit 26 fixedly installed at the upper end of the column 21.
By operating this cylinder unit 260, the elevating body 27 is moved diagonally up and down along the guide rod 28, and the main bin 30, which fits into the hole 29 from above, is attached to the elevating body 27 to attach the shock absorber of the front wheel house W1. A sub-bin 32 that fits into the hole 31 is provided for bolt attachment provided near the hole 29. A slit 33 is formed in the main bin 30 in the axial direction, and a clamp claw 35 operated by the cylinder unit 34 is inserted into the slit 33.
has been established. Therefore, the main bin 30 and the sub-bin 32
are fitted into the holes 29 and 31 to horizontally position and prevent the front wheel house W1 from rotating, and by gripping the front wheel house W1 between the clamp claw 35 and the shoulder 36. Performs vertical positioning.

Although FIGS. 3 and 4 only show the positioning and fixing mechanism on one side of the setting jig 2, a similar mechanism is provided on the other side of the setting jig 2, and these mechanisms As a result, the pair of front wheel houses Wl, Wl are fixed with a gap substantially equal to that of the completed vehicle.

The operation of the entire assembly apparatus constructed as described above will be described below.

First, set station S1 shown in FIGS. 1 and 2
, the pair of front wheel houses Wl, Wl are set on the setting jig 2 on the left hand truck 1 with the above-mentioned gap.

Next, by moving the trolley 1.1 eight times to the right in Fig. 2, the set pair of left and right front wheel houses W are removed.
The front wheel house W1, which has been tacked and has been tacked, is carried upwards by the lifting device 5 at this station S2. During this time, the truck 1゜1 returns to the left and moves to the new front wheel house W.
1 is set in the setting jig 2 on the cart 1 on the left side. During this time, the front wheel house W1, which has been lifted upward and has undergone temporary attachment and additional hammering, is again set on the setting jig 2 on the right hand truck 1 by the lowering of the lifting device 5. After that, the trolley 1.1 moves to the right in Fig. 2 again, and the front wheel house W1 newly set in the setting jig 2 on the left side is carried to the tacking station S2, and the front wheel house W1 on the right side The front wheel house W1 set in the setting jig 2 is grasped by the chucking unit 11 of the conveying device that has descended at the delivery position, and then lifted upward, and then conveyed to the upper part of the comprehensive welding device 7, where it is welded by the general welding device 7. It is set in the main body 50 of the device and integrally welded with other workpieces, ie, the bulkhead W2 and dash board W3. During this time, the gap between the pair of left and right front wheel houses Wl, Wl is maintained constant.

In the embodiment, a front wheel house is used as an example of a pair of left and right works, but the present invention is not limited to this.

(Effect of the invention) As explained above, according to the welding device according to the present invention,
It is possible to weld the left and right pairs of workpieces at the same time, and the pair of workpieces can be welded while still in the completed vehicle state.
It is advantageous in terms of space and layout, and can be easily automated, improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a vehicle body front assembly device to which the welding device according to the present invention is applied, Fig. 2 is a front view of the same device, Fig. 3 is a front view of a front wheel house setting jig, and Fig. 4 is a front view of a front wheel house setting jig. The figure is a plan view of the setting jig, and FIG. 5 is an enlarged view of the positioning clamp device. In addition, in the drawing, 2 is a setting jig, 3 is a welding robot for temporary attachment, 4 is a welding robot for additional welding, 7 is a general welding robot, wl is a front wheel house, W2 is a bulkhead, and w3 is a dash board. It is.

Claims (1)

[Claims] In a device that simultaneously welds left and right pairs of workpieces that make up a vehicle body, this device has a welding device that welds each of the pair of workpieces on both sides of a set jig, and A vehicle welding device characterized in that a positioning clamp device is provided for fixing a pair of workpieces with a gap substantially equal to that of a completed vehicle, and the positioning clamp device is adapted to fix the workpieces from the center side of the vehicle body. Device.