JPH0324304Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a three-dimensional curve welding device that can automatically weld three-dimensional welding curves.

[Conventional technology]

For example, vanes in impellers used in compressors and the like cannot be automatically welded because the weld line is a three-dimensional curve, so welding is performed manually.

[Problem that the invention attempts to solve]

However, in such manual welding, it is necessary to move the workpiece and the torch separately, and the welding work is difficult because the workpiece rotates or falls over, or the welding position tends to change.

Furthermore, since the welded part cannot be visually recognized due to the arc, the operator requires skill and relies on intuition, making it difficult to obtain a high-quality product.

[Means for solving problems]

In order to solve the above-mentioned problems, in the present invention, a rotating shaft capable of supporting and fixing a welded workpiece is rotatably attached to a bracket, and the bracket can be rotated about an axis perpendicular to the rotating shaft. It is composed of a welding object moving mechanism fixed to a rotary table, and a torch moving mechanism having a welding torch, which faces the welding object, movably attached in the vertical direction and in the axial direction of the rotating shaft.

[Operation] A welding torch is attached to the tip of a torch holder corresponding to the welding part of the welding object, and when welding starts, the rotary table is rotated while rotating the rotating shaft supporting and fixing the welding object, and at the same time, the welding torch is rotated around the rotating shaft. move in the direction.

Thereby, a three-dimensional curve can be automatically welded always in a downward position.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 and 2 are an embodiment of the present invention,
Rotating shaft 2 capable of supporting and fixing a welded object 1 such as an impeller
is cantilever-supported by a bracket 3, a gear 4 is fixed to the end of the rotating shaft 2 protruding from the bracket 3, and a pinion 6 attached to the output shaft of a motor 5 fixed to the bracket 3 is meshed with the gear 4. The rotating shaft 2 can be rotated by rotating the motor 5.

The bracket 3 is fixed perpendicularly to one surface (surface) of a disc-shaped rotary table 7, and the rotary table 7
was rotatably attached at its center to a shaft 9 erected on the support seat 8, and a gear 10 was attached to the other surface (back surface) of the rotary table 7 so as to be centered at the center, and fixed to the support seat 8. The pinion 11 with the motor 12 attached to the output shaft is connected to the gear 10.
The rotary table 7 can be rotated by meshing with the rotary table 7 and driving the motor 12 to rotate.

A rotating shaft 13 is installed horizontally on both sides of the support seat 8, and the supporting frame 1 is mounted on the rotating shaft 13.
It is pivoted by 4.

The workpiece moving mechanism 15 is configured as described above, and the torch moving mechanism 16 is configured as follows.

Rails 17 are laid in parallel on the support frame 14 in a direction orthogonal to the rotation axis 2, a trolley 18 is placed on the rails 17 so as to be movable, and a T-shaped rack is mounted on the upper part of the trolley 18. A pinion 23 is attached to the gear 21 carved on the upper surface of the leg 20 of the rack 19 and attached to the output shaft of the torch running motor 22. are interlocked.

A screw rod 25 is disposed vertically on the vertically oriented arm 24 of the T-shaped rack 19, and one end side of a support plate 26 is attached to the screw rod 25 so that the support plate 26 is horizontal. Welding equipment such as a torch holder 27, a wire feeder 28, and a wire reel 29 are arranged on the support plate 26. The screw rod 25 can be driven by a torch vertical motor 30.

Next, the operation of the welding apparatus of the present invention will be explained.

Attach the boss portion 32 of the impeller 31 to the rotating shaft 2,
and the vane 33 is fixed in position on the boss portion 32. The torch moving mechanism 16 is brought close to the welding part, the welding torch 34 is attached to the tip of the torch holder 27 according to the bending of the vane 33, and when welding starts, the motor 5 for rotating the impeller and the motor 12 for tilting the impeller are rotationally driven. The torch running motor 22 is driven to rotate. The speed of rotation of the motors 5 and 12 is adjusted so that the welding curve moves from one end and is successively positioned at a constant height and directly above the rotating shaft 2. As the motor 12 for tilting the impeller is driven to rotate, the motor 30 for raising and lowering the torch moves the support plate 26 up and down in order to keep the arc length constant.

Thereby, by simply moving the rack 19 in the axial direction of the rotary shaft 2, a three-dimensional welding curve can be automatically welded always in a downward position.

It should be noted that the three-dimensional curve welding device of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effect of idea]

As described above, according to the three-dimensional curve welding apparatus of the present invention, a rotating shaft capable of supporting and fixing a workpiece to be welded is rotatably attached to a bracket, and the bracket is rotated about an axis orthogonal to the rotating shaft. A welding object moving side fixed to a rotary table that can be driven; and a torch moving side having a welding torch facing the welding object movably mounted in the vertical direction and in the axial direction of the rotating shaft. With this configuration, it is possible to automatically weld a three-dimensional welding curve downward, and various excellent effects can be achieved, such as the welding work being simplified and automated, and high-quality products being reliably obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of one embodiment of the apparatus of the present invention, and FIG. 2 is a view taken in the direction indicated by the arrow in FIG. 1 is a welding object, 2 is a rotating shaft, 5 is a motor, 7 is a rotating table, 8 is a support seat, 12 is a motor, 14 is a support frame, 15 is a welding object moving mechanism, 16 is a torch moving mechanism, 17 is a rail, 18 is a trolley, 19
22 is a torch running motor, 26 is a support plate, 27 is a torch holder, 30 is a torch vertical motor, and 34 is a welding torch.

Claims (1)

[Scope of utility model registration request] A weldment workpiece moving mechanism comprising: a rotating shaft capable of supporting and fixing a weldment workpiece attached to a bracket so as to be rotatable; and the bracket fixed to a rotary table capable of rotating around an axis orthogonal to the rotational shaft. and a torch moving mechanism in which a welding torch directed toward the workpiece is movably mounted in the vertical direction and in the axial direction of the rotating shaft.