JPH0217743Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic welding machine for inserting a member to be welded into the end of a long hollow member and welding the parts.

B. Prior art A component in which a shaft member is inserted into openings at both ends of a long hollow member and the two are welded together, for example, in an automobile suspension, a spindle is welded to both ends of a hollow axle beam. The distance between the spindles and the center alignment of the axle beam and spindle must be performed with high precision. For this reason, conventionally, instead of pressing the spindles on both sides to the axle beam for welding, each part was positioned in its proper position using a dedicated jig, and in this state, the entire circumference of the axle beam and spindle was welded. This allows the machining errors of each part to be absorbed and combined. However, with the above welding method, it is not possible to rotate the axle beam, and the axle beam and spindle are temporarily attached at several locations, and then the axle beam and spindle are rotated together using an automatic welding machine. The entire circumference was welded.

That is, conventionally, as shown in FIG. 1, the positioning pin 4 provided on the positioning jig 3 was
At the same time, the shaft portion 2a of the spindle 2 is inserted into the support hole 6 of the clamp jig 5, and the flange 2b is clamped with the clamp 7. Move the clamping jig 5 horizontally to insert the root 2c of the spindle 2 into the end of the axle beam 1, and after stopping at a predetermined position, use the tacking torch 8 to connect the root 2c of the axle beam 1 and the spindle 2. Temporarily attach them in several places, for example, in three places. Next, the axle beam 1 and spindle 2 are removed from the positioning jig 3 and clamping jig 5, respectively, and the shaft portion 2a of the spindle 2 is chucked using the chuck jig 9 of an automatic welding machine as shown in FIG. While rotating the spindle 2 in this state, weld the entire circumference between the root 2c of the spindle 2 and the axle beam 1 using a torch 10, and then remove the spindle 2 from the chuck jig 9 and take out the product. Ta.

Conventionally, a welding machine for tack welding and a welding machine for actual welding are required, which increases equipment costs and also requires changing the axle beam 1 and spindle 2 from the welding machine for tack to the welding machine for actual welding during the welding process. Furthermore, when tacking, if there are two or less tacking points, there is a problem that positional deviation will occur between both 1 and 2 when reassembling, so tacking must be done at three or more places. , the number of man-hours was very large, and the work efficiency was very poor.

(b) Purpose of the invention This invention aims to provide an automatic welding machine that can perform tack welding and permanent welding with one device without rearranging parts, and can perform tack welding at one location. It is something.

C. Structure of the device In this device, a positioning jig 16 for positioning and supporting the hollow member 1 is provided so as to be movable up and down, and the member to be welded 2
Positioning jig 16 for chuck jig 17 that holds
A temporary attachment torch 24 for temporary attachment and a permanent attachment torch 25 for actual attachment are arranged at a distance of 90 degrees or more from each other, and a positioning jig is used for temporary attachment. The hollow member 1 is positioned at 16, and the workpiece 2 to be welded is held by the chuck jig 17 to position both 1 and 2. Temporary attachment is performed at one place using the tacking torch 24, and then the positioning jig 17 16 is lowered, and the workpiece 2 and hollow member 1 are rotated using the chuck jig 17.
5, the entire circumferences of both 1 and 2 are welded.

D. Embodiment Figures 3 and 4 are drawings showing an embodiment of the present invention, in which a spindle 2, which is a member to be welded, is welded to both sides of an axle beam 1, which is a hollow member in the suspension of an automobile. It shows. In the same figure, 15 is a stand for an automatic welding machine;
A positioning jig 16 for positioning and supporting the axle beam 1 is provided at the center of the frame 15, and chuck jigs 17, 17 for holding the spindle 2 are provided on both sides of the positioning jig 16.

The positioning jig 16 has a connecting rod 18 of a predetermined length.
V-blocks 19, 19 for supporting the lower surface of the axle beam 1 and positioning blocks 20, 20 for positioning are integrally connected to both ends of the axle beam 1, respectively.
Positioning pins 21, 21 are provided protruding from the upper surfaces of a, 20a. Therefore, the positioning hole (not shown) provided in the axle beam 1 is inserted into the positioning pin 21,
21, and the bottom surface of the V block 19, 19.
By placing the axle beam 1 on the V grooves 19a, 19a of the axle beam 1 and bringing the side surfaces into contact with the vertical portions 20b, 20b of the positioning blocks 20, 20, the axle beam 1 can be positioned with respect to the positioning jig 16 without wobbling. This positioning jig 16 is mounted so as to be movable up and down along the longitudinal direction of the frame 15, and is set so that it can be moved up and down by appropriate means, and at the raised position, the axle beam 1 can be set to the height at the time of welding. has been done.

Further, the chuck jig 17 has a chuck mechanism 22 for chucking the shaft portion 2a of the spindle 2 and a drive mechanism (not shown) for rotating the chuck mechanism 22 built therein, and has a flange of the spindle 2 on the front surface of the inner end surface 17a. A clamp member 23 is provided to clamp 2b. The chuck mechanism 22
is provided at a height such that its chuck center coincides with the center of both end openings of the axle beam 1 set at the welding position. Therefore, the shaft portion 2a of the spindle 2 is chucked by the chuck mechanism 22,
When the flange portion 2b is clamped between the inner end surface 17a and the clamp member 23, the center of the spindle 2 and the center of the axle beam 1 are aligned, and the longitudinal position of the spindle 2 is regulated. This chuck jig 17 is mounted on both sides of the positioning jig 16 so as to be horizontally movable along the longitudinal direction of the pedestal 15 at positions equidistant apart from each other, and is moved by an appropriate moving means, and at its forward end. The spindle 2 is set to a predetermined welding position.

24, 24 are axle beam 1 and spindle 2
Temporary attachment torches 25, 25 are used to perform temporary attachment, and the temporary attachment torch 24 is separated from the actual attachment torch 25 by an interval of approximately 100° at both ends of the axle beam 1. It is placed in

To explain the operation in the above structure, a worker holds two spindles 2, 2, and the chuck jig 1 has their shaft parts 2a, 2a retracted backward respectively.
7 and 17 and chucked, and at the same time, the flanges 2b and 2b of the spindles 2 and 2 are clamped by the clamp members 23 and 23. Next, the axle beam 1 is placed on the V-blocks 19, 19 of the positioning jig 16 that is waiting to rise, and the positioning hole is inserted into the positioning pin 21,
21 for positioning. In this state,
When the start button is pressed, the chuck jigs 17, 17 move inward a predetermined distance so as to approach each other, and connect the roots 2c, 2c of both spindles 2, 2 to the axle beam 1.
Insert it into the openings at both ends and set it to the normal position. Thereafter, the tacking torches 24, 24 move forward to weld and tacking the axle beam 1 and spindle 2 together at one location. When the tacking is completed, the tacking torches 24, 24
is moved backward, and at the same time the positioning jig 16 is lowered, the positioning pins 21, 21 are moved out of the positioning holes, the axle beam 1 is set in a free state, and the clamp members 23, 2 of the chuck jigs 17, 17 are moved back.
3 opens and the flanges 2b, 2 of the spindles 2, 2
Open b. After that, the torches 25, 25 move forward and start welding the axle beam 1 and the spindle 2, and at the same time, the chuck mechanisms 22, 22 of the chuck jigs 17, 17 start rotating, and the spindle 2
The axle beam 1 is rotated, and thus both 1 and 2 are permanently attached. When the actual attachment is completed, the attached torches 25, 25 are moved back, and at the same time, the chuck mechanisms 22, 22 are opened and the spindles 2, 2 are opened.
is released, after which the chuck jigs 17, 17 are retreated and the axle beam with spindle is taken out.
Thereafter, the positioning jig 16 is raised and the above-described operation is repeated to weld the axle beam 1 and the spindle 2 together.

E. Effects of the invention With this invention, it is possible to temporarily and permanently attach the hollow member and the workpiece to be welded using a single device, eliminating the need for dedicated welding machines for each as in the past, and reducing equipment costs. The installation space can also be narrowed down. In addition, unlike in the past, there is no need for reassembly when transitioning from temporary attachment to actual attachment, and positional misalignment between each member during reassembly is eliminated. Because they are spaced more than 1000 degrees apart, when final attachment is performed after temporary attachment, the welding is performed sequentially toward the temporary attachment point, so even if the temporary attachment is in one place, there will be no positional deviation, resulting in high precision. Welding can be performed, and the number of man-hours required can be significantly reduced, thereby greatly improving work efficiency.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts of a conventional tack welding machine.
Figure 2 is a cross section of the main part of a conventional welding machine for final attachment, and Figure 3 is
The figure is a perspective view schematically showing a welding machine according to the present invention, and FIG. 4 is a sectional view of a main part of the welding machine. 1... Hollow member (axle beam), 2... Welded member (spindle), 16... Positioning jig, 17
...chuck jig, 21...positioning pin, 22...chuck mechanism, 23...clamp member, 24...temporary attachment torch, 35...main attachment torch.

Claims (1)

[Scope of utility model registration request] A positioning jig that is movable up and down and that rises during temporary attachment to position and support the hollow component and lowers and retreats during actual attachment; A chuck jig that chucks the welded part to position and attach it to the end of the hollow member and rotates the welded part during the actual attachment, and a temporary attachment torch and a jig that are placed at least 90 degrees apart around the welding position. An automatic welding machine characterized by being equipped with an attached torch.