JPS5920428B2 - Wheel copy welding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic profile welding device used for welding the entire circumference of a rim and a disk of an automobile wheel.

Conventionally used automatic copy welding equipment for welding the disk and rim together detects the welding position by installing a copy roller at a position preceding the welding torch on the inner circumferential side of the rim, and then moving the torch mechanically or electrically. The welding was performed by controlling the position of the tip of the torch by following the target.

However, since the copying roller precedes near the torch,
Not only will the welding spatter disturb the sensor itself and its detection accuracy, but it will also detect irregularities in the partial temporary welding area where the disc and rim are temporarily attached, which will disturb the movement of the tracing torch. I had given it away.

The present invention aims to solve the problems associated with conventional welding equipment. In view of this, the copying roller is applied from the outer periphery of the rim corresponding to the weld between the rim and disk, that is, from the back side when viewed from the weld, and the welding torch is inserted into the weld from the inner periphery of the rim. The present invention provides a wheel copy welding device that performs welding.

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire apparatus of this embodiment, and numeral 1 in the figure is a wheel to which the rim 1a and the disk Ib are welded all around.

Ic indicates the welding area to be welded all around. Reference numeral 2 denotes a rotatable rotary table, and the wheel 1 is placed on the rotary table 2, and the pin 3 is inserted into the hole of the wheel disk Ib to align the position, and the relative rotation between the wheel 1 and the rotary table 2 is stopped. Welding is performed while rotating the wheel 1 together with the rotary table 2.

The axis of the rotary table 2 can be adjusted in the X direction in the figure, and wheels with different diameters can be welded at a single welding position by adjusting the axis position. ing. Above the rotary table 2 is a tilted cylinder 4.
A slide unit 6 is attached to the tip of the rod 5 of the cylinder 4 so as to be able to approach and separate from the wheel 1 on the rotary table 2.

By driving the cylinder 4, the slide unit 6 moves up and down in the Y direction in the figure, moving forward and backward relative to the wheel 1. When the wheel 1 is attached to and removed from the rotary table 2, the slide unit 6 is raised upward to prevent interference with the wheel 1, and when the wheel 1 is to be rotated for welding, the slide unit 6 is at the lower end position, that is, as shown in FIG. lowered to the desired position. The slide unit 6 supports the floating table r in a floating manner, as shown in a partially enlarged view in FIG.

A frame 8 of the slide unit 6 is attached to the rod 5 side of the cylinder 4, and a floating table 7 is attached to the frame 8 so as to be movable in the horizontal direction along a pair of guide rods 9 via bearings 10. The floating table r is urged in the Z1 direction in the figure by a spring 11 at an intermediate position between the pair of guide rods 9. Numerals 12 and 13 are screws screwed into the frame 8 and the floating table 7, respectively, and by adjusting the abutment positions, the opening angle of the torch, which will be described later, can be adjusted.

The floating table 7 is provided with a perforation piece 14 extending downward, and an arm 15 is pivotally supported on the perforation piece 14 so as to be rotatable about a fulcrum 16 . A copying roller 17 is attached to the tip of the arm 15 so as to be rotatable around two axes of the roller 17, and when the arm 15 rotates, the copying roller 1r
is pressed against the outer periphery of the rim 1a and when the rim 1a is rotated by the rotary table 2, the copying roller 1r
It is designed to roll around the outer periphery of a. The length of the arm 152 is such that when the copying roller 1r is pressed against the outer periphery of the rim 1a, the copying roller 1r is positioned just on the outer periphery side of the welded portion 1c between the rim 1a and the disk 1b. The floating table r extends in the Z1 direction in the figure, and a torch holder 18 is attached to its three ends.

The torch holder 18 holds a torch 19 for MIG welding. The torch holder 18 is provided with position adjustment mechanisms 20 and 21 in the P direction and the Q direction, so that the position of the torch 19 can be adjusted in accordance with the lie wheel 1. The floating table r also extends in the Z2 direction in the figure, and an arm rotation cylinder 22 is attached to its tip so as to be rotatable around a fulcrum 23.

The tip of the rod 24 of the cylinder 22 is attached to the arm 15 as a fulcrum φ
They are rotatably connected at 25. As a result, a triangle is formed by the fulcrums 16, 23, and 25, and the arm rotation cylinder 22 forming one side of the triangle is expandable and retractable. Using the apparatus having the above configuration, profile welding of wheels is carried out as follows.

First, the wheel 1 to which the rim 1a and the disk 1b are temporarily attached is set on the rotary table 2.

In this case, the pin 3 is inserted into the hole of the disk 1b.
Next, the cylinder 4 is activated, and the rod 5 comes out from the cylinder 4 to move the slide unit 6 downward in the Y direction.
Due to this movement, the copying roller 1T moves to the outer circumferential side of the rim 1a, and the torch 19 moves to the inner circumferential side of the rim 1a and descends. Continuing (・The arm rotation cylinder 22 begins to extend,
The arm 15 is rotated around the fulcrum 16 to press the copying roller 17 against the outer peripheral surface of the rim 1a.

The copying roller 1r is applied to the back side of the welding part 1c. When the copying roller 1r contacts the outer periphery of the rim 1a and the arm 15 no longer moves toward the wheel 1, the extension of the arm rotation cylinder 22 causes the arm 15 to rotate around the fulcrum 16 and the torch 19 to be horizontal. Start moving in the Z2 direction. That is, if the extension of the arm rotation cylinder 22 in the R direction is divided into a horizontal component S and a component in a direction perpendicular to the horizontal component S, the component component points the arm 15 at the fulcrum 16.
The component S acts to rotate the floating table 7 in the Z2 direction in the figure against the spring 11, and thus pulls the torch 19 in the Z2 direction toward the welding site 3. . The movement of the torch 19 stops when the cylinder 22 is fully extended, but by adjusting the adjustment mechanisms 20 and 21, the tip of the torch 19 is brought to a position suitable for welding the welding part 1c ( - Next, welding is performed while rotating the rotary table 2 around its axis, and the welding portion 1c of the wheel 1 is welded over the entire circumference.

In this case, when the copying roller 1r moves, the triangle 16,
While keeping the shapes of 23 and 25, the tip of the torch 19 is made to follow the roller 17. Automatic copying is thus achieved. When the welding is complete, arm rotation cylinder 2
2 contracts, and the tip of the torch 19 moves away from the welding site 1c in the Z direction.

Subsequently, the arm 15 rotates and the copying roller 1r moves onto the rim 1a.
As the cylinder 4 moves away from the outer circumferential surface of the wheel 1, the cylinder 4 rises, lifts the slide unit 6, lifts the copying roller 1r and the torch 19 together, and after the interfering devices are removed from the periphery of the wheel 1, the wheel 1 moves to the turntable. Removed from 2. When welding the next wheel 1, repeat the above operation. It becomes cold. Since the wheel profile welding apparatus of the present invention is as described above, the following effects can be obtained according to the present invention.

First of all, since the copying roller is applied to the outer circumferential surface of the rim on the opposite side of the welding part, the force of the welding spatter is not detected, and the roller does not detect irregularities in the temporary welding part, making it stable. It is possible to perform reliable copy welding.

In addition, since the copying roller and the torch are arranged with the rim separated, there is no need to install the copying roller in advance of the torch, and it can be installed at the torch position, allowing the torch to copy the rim with high precision. It is possible to improve the quality of the product.

Furthermore, by providing a slide unit with a floating table, a cylinder for rotating the arm, etc., the torch can be skillfully drawn toward the welding site, thereby providing a high-performance automatic copy welding device with a simple structure and compact size. be able to.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an apparatus according to an embodiment of the present invention, and FIG.
The figure is a partial sectional view of the slide unit of the apparatus shown in FIG. 1. 1...Wheel, 1a...Rim, 1b
...Disc, 2...Rotary table, 4...
...Cylinder, 6...Slide unit,
7... Floating table, 11... Spring, 15.
... Arm, 16, 23, 25 ... Fulcrum, 17 ... Copying roller, 18 ... Torch holder, 19 ... Torch, 22.・・・・・・
Cylinder for arm rotation.

Claims (1)

[Claims] 1. A rotatable turntable on which a wheel is placed, a slide unit that is provided so as to be able to approach and leave the wheel on the turntable and supports the floating stand in a slidable manner, and an arm rotatably supported on the floating stand. and a copying roller attached to the tip of the arm, a torch holder supported on the floating table side, a torch held by the torch holder, and a copying roller that is pivoted between the floating table and the arm and rotates to move the copying roller around the outer periphery of the rim. A wheel profiling welding device comprising an arm rotating cylinder that presses the profiling roller against the outer periphery of the rim and then retracts the torch from the inner circumferential side of the rim to a position facing the welding part between the rim and the disk.