JPS60250876A - Parallel oscillating device of automatic welding machine - Google Patents

Abstract

PURPOSE:To obtain the titled device for controlling exactly and automatically a welding torch position by transferring a rotational angle of a screw rod to a detector by a gear, in a welding torch parallel oscillating device for shifting a moving piece by a rotation of the screw rod driven by a motor. CONSTITUTION:A screw rod 3 is rotated by driving of a motor 2, a screw fitting moving piece is moved, and an attached welding torch 1 is oscillated in parallel. A rotational angle of the screw rod 3 is transferred to a detector by attached gears 7, 8, and a position of the welding torch is detected. The rotation of the motor 2 is controlled by inputting this detected value to an automatic control device, and the position of the welding torch 2 is controlled automatically. Accordingly, an automatic oscillating device becomes small in size. In this regard, as for the transfer to the detector 6, a worm gear system and a movement direct transfer system of a moving piece 4 can be adopted, as well.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention detects the amount of parallel movement of a moving piece in a parallel oscillation device of an automatic welding machine via the rotation angle of a threaded rod,
The present invention relates to a parallel oscillation device that can perform stable control.

[Technical background]

With the development and development of industry, production lines have become more diverse, and in situations where uniform work is performed, labor savings, improved safety,
Various industrial robots are being developed and put into practical use with the aim of improving the environment and making quality uniform.

Among these, various improvements have been made in the automatic welding machine department to improve work efficiency.

However, when it comes to parallel oscillation devices that move the welding torch in parallel, there is still room for modification.

For example, a conventional parallel oscillation device has a configuration as shown in FIG. Here, 1 is a welding torch, 2 is a motor, 6 is a threaded rod, 4 is a moving piece, 5 is a detector movable part, and 6 is a detector main body.

In this case, when the rotational force of the motor 2 is transmitted to the threaded rod 6, the movable piece 4 screwed onto the threaded portion moves to the right or left depending on the rotation direction of the threaded rod 6, but it is not fixed to the movable piece 4. A welding torch whose movement is regulated and moves to the left or to the left.

A detector movable part 5 is separately attached to the movable piece 4, and the amount of change thereof is input to the detector main body B according to the moving distance of the movable piece 4.

By the way, in this type of device, the specification of the off-rate stroke of the oscillating device is changed depending on the change of the object, but each time the specifications of the off-rate stroke of the oscillating device are changed, and at the same time, the parts constituting the movable piece 4 and the detector movable part 5 ( In some cases, it is necessary to change the detector body 6), and the size of the detector is approximately twice as large as the total stroke. Furthermore, the screw rod 6 and the moving piece 4 which are off-rate drive parts
It is conceivable that the threaded rod 6 may rotate or the movable piece 4 may move by that amount, and therefore the input information input from the movable piece 4 to the detector movable part may be incorrect. It had the disadvantage of being unstable.

[Summary of the invention]

The present invention solves the various drawbacks mentioned above and provides a parallel oscillation device for an automatic welding machine that can accurately grasp the amount of parallel movement and adapt to the actual situation. In a parallel oscillation device that rotates a syn-threaded rod and moves a moving piece by the threads of the rotating screw rod, a gear is provided concentrically with the screw rod, and the rotation angle of this gear is extracted by another gear and the rotation angle is detected. The present invention relates to a parallel oscillation device for an automatic welding machine, characterized in that the stroke of a moving piece is adjusted by inputting it into a device and detecting the amount of rotation.

A gear that is concentric with a threaded rod may be one in which a normal gear is fitted around the circumferential surface of the threaded rod shaft, and another gear can be engaged from there.A worm may be installed on the threaded rod. may be a combination of a worm wheel and a worm wheel.

Hereinafter, the configuration of the present invention will be specifically explained using examples.

[Embodiments of the invention]

A parallel off-rate device as shown in FIG. 1 was constructed in accordance with the present invention. In the figure, 1 is a welding torch, 2 is a motor, the roller is a threaded rod, 4 is a moving piece, 5 is a detector movable part, 6 is a detector body, and 7.8 is a gear.

In the oscillator device configured in this way, when the threaded rod 6 rotates based on the rotation of the motor 2 and the movable piece moves, the welding torch 1 moves to a predetermined position as the movable piece 4 moves. At this time, the gear 7 also rotates at the same time, and this transmits the rotation angle to the gear 8, which inputs the rotation information (i.e., information on the moving distance) to the detector main body B via the detector movable part 5. It is.

In addition, for example, a configuration as shown in FIG. 2 may be used as another embodiment. In this case 9 is warm, 10
shows a worm wheel.

〔Effect of the invention〕

When the oscillation stroke changes, the parallel off-rate device of the present invention can accommodate the entire stroke of the moving piece by simply changing the gear reduction ratio, and does not require changing the detector like conventional products. The overall effect of the casing is that it can be made into a compact oscillating device.

[Brief explanation of the drawing]

1 and 2 are side views of a parallel on-rate device for an automatic welding machine constructed based on the present invention, and FIG. 6 is a side view of a conventional parallel on-rate device. 1... Welding torch, 2... Motor, 6... Threaded rod, 4... Moving piece, 6... Detector body, 7, 8...
・Gear, 9... Worm, 1o... Worm wheel Note that the same reference numerals in each figure indicate the same or equivalent parts. Representative Patent Attorney Sanro Kimura

Claims (1)

[Claims] 1. In a parallel oscillation device in which a threaded rod is rotated by the rotation of a motor and a moving piece is moved by the threads of the rotating threaded rod, a gear is provided concentrically on the threaded rod and the gear is A parallel oscillation device for an automatic welding machine, characterized in that the rotation angle is output to another gear, the rotation angle is inputted to a detector, the amount of rotation is detected, and the stroke of a moving piece is adjusted. 2. The parallel oscillation device for an automatic welding machine according to claim 1, wherein the gear provided on the threaded rod is a worm gear and the other gear is a worm wheel.