JPH0450103B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a welding device for welding workpieces using a setting jig.

(Prior Art) The body of an automobile is constructed by welding a plurality of panels (workpieces) together. Such a device for welding a body is equipped with a workpiece clamping mechanism, and each workpiece is manually set in the welding device main body and each workpiece is welded.

However, with this method, it takes time to set the workpiece, so
As disclosed in No. 1, a preset jig is attached to the welding equipment main body, and while the work is being welded, the next work to be welded is set on the preset jig, thereby reducing the work time. The device is known.

(Problems to be Solved by the Invention) According to the conventional device described above, it is possible to significantly shorten the working time, but when it comes to welding automobile bodies, etc., there is a problem with the subsequent process. Even if only the time of the welding equipment can be reduced, it may not have much effect on the overall efficiency, and in the case of conventional equipment, the workpiece must be completely transferred from the preset jig to the welding equipment main body, and this In order to do this, it is necessary to provide a workpiece clamping mechanism in both the preset jig and the welding device main body, which makes the entire device large and complicated, which is disadvantageous in terms of cost.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a welding device main body equipped with means and a fixing device for positioning and fixing a welding gun and a workpiece, and a setting jig for holding another workpiece. At the same time, a means for reciprocating the setting jig between the workpiece setting position and the welding position is provided, and the setting jig is positioned and fixed to the welding equipment body at the welding position via a fixing device, and the workpiece is placed on the setting jig. Each workpiece is welded together while holding it.

(Function) Since the workpiece is welded while being held in the setting jig, there is no need to transfer the workpiece.
When welding together the workpieces set in the setting jig and the welding device main body, there is no need to provide a mechanism for simultaneously positioning and clamping the workpieces.

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

FIG. 1 is a front view showing a cradle of a welding device according to the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is a view taken in the direction of arrow B in FIG. The stand 1 has a support 3 erected on one side of a base plate 2 fixed on the floor, a rail member 4 is provided in a frame built on the support 3, and a traveling body 5 is engaged with the rail member 4. However, due to the operation of a cylinder unit (not shown), the traveling body 5 moves in the direction perpendicular to the plane of the paper in FIG. 1 (in the left-right direction in FIG. 2).
I'm trying to move to. Further, a chucking unit 7 is attached to the traveling body 5, which moves forward and backward by the operation of the cylinder unit 6, and a setting jig, which will be described later, is attached and detached by this chucking unit 7.

Furthermore, a box part 8 is provided on the board 2, a transformer 9 is housed in the box part 8, and a connector 1 extending from the transformer 9 is arranged on the top surface of the box part 8.
0 stands out. A pair of cylinder units 11, 11 are attached to one side of the box part 8 via a bracket, and a rod guide 12 is attached to the other side.A rail 13 is attached to the upper end of the rod 11a of the cylinder unit 11, and is inserted through the rod guide 12. A rail 14 parallel to the rail 13 is fixed to the upper end of the rod 12a, and the lower end of the rod 11a and the lower end of the rod 12a are connected via a link mechanism 15. The other rail 14 is also made to move up and down by the same amount, and these rails 13 and 14 are provided with hooks 16 for fixing the welding device main body, which will be described later, to the pedestal 1 side.

Further, the lower end portions of support plates 17, 17 are fixed to one side of the box portion 8 via a bracket, and a bracket 1 is attached at an intermediate position between these support plates 17, 17.
A cylinder unit 19 in the vertical direction is pivotally connected via a shaft 2 which is installed between the upper parts of the support plates 17, 17.
Attach an arm 21 to 0, connect the rod 19a of the cylinder unit 19 to this arm 21,
The arm 21 is moved to the shaft 2 by the operation of the cylinder unit 19.
It is designed to swing vertically around 0. Further, a cylinder unit 22 is fixed to the tip of the arm 21, and a chucking unit 23 is provided at the tip of the rod 22a of the cylinder unit 22.

Further, as shown in FIG. 3, air distributors 24, 24 connected to the compressor are arranged on the sides of the box portion 8, and air is supplied from the distributor 24 to each cylinder unit.

FIG. 4 is a front view showing the state in which the welding device main body 30 is carried onto the pedestal 1 having the above-described structure, and FIG. 5 is a view taken in the direction of arrow D in FIG. A roller 32 that rolls on the rails 13 and 14 of the pedestal 1 is attached to the lower surface of the
A locking piece 33 that is engaged with the hook 16 is provided inside the connector 10, and a connecting piece 34 that is inserted into the connector 10 is provided inside the locking piece 33.

Further, a large number of brackets 35 are provided on the upper surface of the horizontal plate 31, and welding guns 36 are attached to predetermined ones of these brackets 35, and workpieces W3 are positioned and fixed to predetermined brackets ₃₅ . A cylinder unit 37 for positioning and fixing is attached, and fixing devices 38 and 39 for fixing a setting jig, which will be described later, to the welding device main body 30 are provided spaced apart on the left and right.

The fixing device 38 is for positioning and fixing the setting jig 50 with respect to the welding device main body 30, and its concrete structure is as shown in FIG. A cylinder unit 43 is pivotally attached to the main body 40, and the tip of the rod 43a of this cylinder unit 43 is connected to the claw piece 41 via a link mechanism 44, and the cylinder unit 43 is set by protruding. The jig 50 is held between the main body 40 and the claw pieces 41. Note that 45 is a positioning pin provided on the main body 40 side.

Here, the setting jig 50 is assumed to position and hold, for example, a bulk head constituting an engine room, and its structure is as shown in FIG. 7, which is a view taken in the direction of arrow E in FIG. Positioning pin 5 inserted into the hole of the bulkhead at the bottom
2..., a docking part 53 extending downward from the plate-like body 51 and held between the main body 40 and the claw piece 41 of the fixing device 38, and furthermore, cylinders are provided on both sides of the upper part of the plate-like body 51. A chuck 55 operated by the unit 54 is provided to grip the positioned bulkhead.

On the other hand, the fixing device 39 positions and fixes the setting jig 60 with respect to the welding device main body 30. Unlike the fixing device 38, this fixing device 39 allows the rod 70a of the cylinder unit 70 to be fixed to the welding device main body 30. By inserting it into the docking part 62, the setting jig 60 is fixed.

Further, the setting jig 60 positions and holds, for example, a dart board lower, and its structure is as shown in FIG. 8, which is a view taken in the direction of arrow F in FIG. It has a docking part 62 connected to the device 39, a chuck 64 operated by a cylinder unit 63 is provided in the center, and a positioning pin 65 and a work holder 66 are provided between the docking part 62 and the chuck 64.

In order to weld the workpieces in the above process, first the welding device main body 30 is selected according to the workpieces to be welded. In other words, when welding the bulk head, dart board lower, and wheel house that make up the engine room, a welding device that is equipped with setting jigs 50 and 60 that hold these workpieces, and a welding gun 36 that welds predetermined locations is used. The main body 30 is selected, and this welding device main body 30 is placed on the pedestal 1 via the rollers 32.
Then, as shown in FIG. 9, the rails 13 and 14 were lowered by the operation of the cylinder unit 11 of the cradle 1, and were fixed to the rails 13 and 14. Hook 16
The locking piece 33 of the welding device main body 30 is pressed against the upper surface of the box portion 8. Then, the locking piece 33 comes into contact with the upper surface of the box portion 8. At the same time, the stopper 1a of the pedestal 1 and the stopper 30a of the welding device main body 30 come into contact, the connecting piece 34 is inserted into the connector 10, and the welding device main body 30 is inserted into the distributor 24.
is jointed.

Once the welding device main body 30 is positioned and fixed on the pedestal 1 in this way, the cylinder unit 19
The arm 21 is caused to extend, the arm 21 is swung upward, the chucking unit 23 is advanced by the cylinder unit 22 provided at the tip of the arm 21, and the setting jig 50 held by the fixing device 38 is moved forward. is received by the chucking unit 23, and then the cylinder unit 19 is caused to perform a pulling action, and the arm 21 is swung until the setting jig 50 is oriented substantially upward. Set W1.

Meanwhile, in parallel with this, the cylinder unit 6 of the traveling body 5 is actuated to advance the chucking unit 7, and the chucking unit 7 receives the setting jig 60 held by the fixing device 39, and the chucking unit 7 moves forward. After retracting the king unit 7, the traveling body 5 is moved in the direction perpendicular to the plane of the paper in FIG. 10, and the setting jig 60 attached to the tracking unit 7 is moved to the setting position. Set the dart board lower W2 to 60.

Further, the wheel house W3 is similarly set in a setting jig (not shown).

Once the bulkhead W1, dart board lower W2 and wheel house W3 have been set in each setting jig as described above, the traveling body 5 is moved to the position of the welding device main body 30 as shown in FIG. The units 6, 19, etc. are operated, and the setting jigs 50, 60 holding the bulk head W1 and the dash board lower W2 are positioned and fixed to the welding apparatus main body 30 via the fixing devices 38, 39. Incidentally, the wheel house W3 is similarly positioned and fixed on the welding device main body 30 side while being held by a setting jig.

When the above operations are completed, welding gun 36...
Bulk head W1, dart board lower W2
Then, a predetermined portion of the wheel house W3 is welded to form an engine room. Once the engine room is formed, it is transferred to the next process and additional firing is performed.

In the embodiment, the workpieces are shown as a dart board lower, a bulkhead, and a wheel house, but the workpieces are not limited thereto.

(Effects of the Invention) As explained above, according to the present invention, since welding is performed while the workpiece is held in the setting jig, it is possible to weld the workpiece while it is being held in the setting jig. This saves time and effort, and the mechanism itself can be simplified.

Moreover, since the setting jig is directly positioned and fixed to the welding machine main body, the accuracy of positioning the workpiece is improved.

[Brief explanation of drawings]

FIG. 1 is a front view of a cradle of a welding device according to the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a view taken in the direction of arrow B in FIG. A front view of the welding equipment main body carried into the stand, Figure 5 is D in Figure 4.
6 is an enlarged view of the fixing device, FIG. 7 is a view in the E direction of FIG. 4, FIG. 8 is a view in the F direction of FIG. 4, and FIGS. 9 to 11. FIG. 2 is a front view of a welding device illustrating a welding procedure. In addition, in the drawing, 1 is a pedestal, 5 is a running body, 7, 23
is the tracking unit, 13 and 14 are the rails,
16 is a hook, 30 is a welding device main body, 32 is a roller, 33 is a locking piece, 36 is a welding gun, 38, 39
is a fixing device, and 50 and 60 are setting jigs.

Claims (1)

[Claims] 1 A welding device body equipped with means and a fixing device for positioning and fixing the welding gun and the workpiece, and a setting jig for holding other workpieces, and the setting jig is reciprocated between the workpiece setting position and the welding position. The welding apparatus is characterized in that the setting jig is positioned and fixed to the welding apparatus main body via the fixing device at the welding position, and the respective works are integrated by the welding gun.