JPS6243676Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a welding device used for connecting and welding parts.

When connecting and welding multiple workpieces to form an integral part, for example, when connecting the exhaust pipe and muffler body of a motorcycle muffler and welding them together, welding equipment as shown in Figure 1 is used. has been done. That is, 1 is a muffler body, 2 is an exhaust pipe, and the end of the exhaust pipe 2 is inserted into the end of the muffler body 1, and while rotating both, the welding part P is welded with a welding torch 4. ing. The muffler main body 1 is held by a positioning jig 5, and the jig 5 is provided on a bracket 6 so as to rotate in the direction of the arrow. Further, the exhaust pipe 2 is similarly held by a positioning jig 7, and the jig 7 is provided on a bracket 8 so as to rotate in the same direction as the muffler main body 1. 9 and 10 are transmission gears that rotate each bracket 6 and 8;
11 is its transmission shaft, and 12 is a device frame.
In such a device, the muffler main body 1 and the exhaust pipe 2 need to rotate in synchronization, but the respective positioning jigs 5 and 7 are provided on separate separate brackets 6 and 8.
Therefore, due to bumps in the transmission gears 9 and 10, minute misalignment between both rotation centers, minute "deflections" in the brackets 6 and 8 that attach the jigs, and other mechanical looseness and wear, the muffler There is a drawback that positioning accuracy between the main body 1 and the exhaust pipe 2 cannot be obtained. Furthermore, there are many problems with accuracy especially when the device is shared by many types.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to improve the shortcomings of the conventional device, improve the positioning accuracy of the workpiece, and to be able to handle workpieces of various diameters. The object of the present invention is to provide a versatile welding device that can perform welding even in various situations.

The gist of the present invention is to provide a welding device for connecting and welding a plurality of workpieces, in which a jig for holding each workpiece is arranged on a single rotatable bracket, and at least one jig is arranged on a single rotatable bracket. The movable jig is movably attached to the bracket by a support mechanism disposed on the bracket, and the movable jig is retracted from the welding torch while the bracket is rotated to perform connection welding of the workpiece. It's about trying to get it.

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

In FIG. 2, 1 is a muffler body, 2 is an exhaust pipe, 21 is a positioning jig for the muffler body 1, and 22 is a positioning jig for the exhaust pipe 2. This positioning jig 22 includes a holder 29 that can be opened and closed, and is rotatably provided at one end of an arm 23, and the other end of the arm 23 is also rotatably supported by a support 24. Pillar 2
4 and the positioning jig 21 are both fixed to the same bracket. The positioning jig 22 is rotatably attached to the bracket 25 by a support mechanism consisting of a column 24 and an arm 23. Further, 26 is a rotating device, and the bracket 25 is provided on a rotating shaft 27 from the rotating device 26. 28 is a frame of the device, which rotatably supports the rotating device 26. 4 is a welding torch.

This device is used as follows. First, the second
As shown in the figure, set the muffler body 1 and exhaust pipe 2, and place them on the positioning jig 2.
1 and 22.

Then, the welding torch 4 is brought close to start welding. The rotation of the rotation shaft 27 of the rotation device 26 causes the muffler body 1 and the exhaust pipe 2 to rotate together with the bracket 25, and the welded portions P thereof are sequentially welded while rotating. Immediately before the positioning jig 22 contacts the welding torch 4,
In response to a signal from a conventional means for detecting the approach, the positioning jig 22 releases the exhaust pipe 2, moves in the direction shown by the arrow, and retreats to the position shown by the chain line. At this point, welding area F
Welding is completed to 1/3 to 1/2 of the entire circumference, so even if the exhaust pipe 2 is unclamped, no displacement will occur. Thereafter, it is sufficient to weld the entire circumference of the welded portion P in this state. After welding is completed, the welded muffler main body 1 and exhaust pipe 2 are removed and returned to their initial state.

The welding posture of the workpiece may be adjusted by appropriately changing the elevation angle α and the rotation angle of the bracket 25 using the rotation device 26.

As described above, according to the device of the present invention, the muffler main body 1 and the exhaust pipe 2 to be connected are arranged on the same bracket 25 and the jig 21
and 22 and its bracket 25
Because welding is performed while rotating, there are no problems such as bumps in the transmission gear, misalignment of the rotation center, and
There is no influence from mechanical looseness or wear such as "bending" of the bracket, and therefore the positioning accuracy of the workpiece is improved. Especially when this device is shared by multiple models, it is easy to achieve positioning accuracy, and multiple workpieces can be connected and welded without causing welding irregularities. In addition, by appropriately adjusting the moving position of the welding torch 4, it is possible to properly connect and weld workpieces of various diameters, thereby providing a highly versatile welding device. Furthermore, the welding posture of the workpiece can be changed as appropriate, and the optimal position can be selected in relation to the shape of the workpiece, the welding position, and the welding torch. Therefore, the welded appearance is also improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional welding device, and Fig. 2 is a schematic diagram of a welding device according to the present invention. 1: muffler body, 2: exhaust pipe, 4: welding torch, 21, 22: positioning jig, 23: arm, 24: support, 25:
Bracket, 26...rotating device, 27...rotating shaft, 28...frame.

Claims (1)

[Claims for Utility Model Registration] (1) In a welding device for connecting and welding a plurality of workpieces, a jig for holding each workpiece is arranged on a single rotatable bracket, and at least one A jig is movably attached to the bracket by a support mechanism disposed on the bracket, and while the bracket is being rotated to perform connection welding of the workpiece, the movable jig is attached to a welding torch. A welding device characterized in that it can be evacuated from the welding device. (2) The practical use characterized in that the support mechanism is composed of a column fixed on the bracket and an arm rotatably attached to the column, and the jig is attached to the arm. A welding device according to claim 1 of patent registration.