JPH0140625Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a profiling device in which the tip of a welding torch through which a welding wire is passed is used as a stylus, and the tip of the welding torch is made to follow the position of a weld line on a workpiece.

There have been many mechanical profiling devices in the past, but in all of them, the stylus scans at a position that is either ahead of or behind the processing point, and with this method, the welding wire and stylus are misaligned, making it difficult to position the torch using the stylus. I was unable to imitate it accurately.

In this invention, before the welding torch performs copy welding, the tip of the welding torch is used as a stylus to slide in the longitudinal axis direction of the torch, bring it into contact with the workpiece, and align the center of the tip along the bevel angle. The purpose is to provide a new processing device that aligns the tip with the welding line, accurately positions the torch, and pulls the tip in the axial direction to maintain a certain distance from the workpiece during welding. do.

FIG. 1 is a side view showing the structure of an embodiment of the present invention.

1 is a tip that also serves as a stylus of the welding torch 100; 2 is a first piston that causes the tip 1 to protrude or retract in the direction of the longitudinal axis 16 of the torch; that is, it slides up and down; 3 is an elastic body; and 4 is a first piston. a second piston 5 which engages the piston 2 and slides up and down on the upper part of the torch with a play l between them; 5 a first chuck on the side wall of the second piston 4;
6 is a second chuck on the side wall of the first piston 2 and locks the piston 4; 7 is the first and second chuck;
A second air port 8 introduces air that slides the pistons 2 and 4 downward and upward, respectively, to enlarge the gap between them; 8 is the first chuck 5;
A first air port 9 introduces air to bring the second piston 4 into the locked state through the chuck 6 and bring the first piston 2 into the locked state through the second chuck 6; 10 is a spherical body 17 fixed to the side wall of the welding torch 100;
11 is a third chuck 1 that locks the spherical body 17 of the welding torch 100.
12 is the center of the spherical body 17 and is a fulcrum when the welding torch 100 freely rotates in any direction; 13 is the workpiece to be processed; 14 is the welding wire; 15 is welding line, 18
is a shield gas passage, 200 is a welding torch 100
The arm has a concave spherical surface that fits loosely into the spherical body 17.

In FIG. 1, chip 1 is a welding torch 100.
It also serves as a stylus, is removable from the first piston 2, and is a consumable item. A welding wire 14 passes through the center or shaft 16 of the chip 1 and the first and second pistons 2,4.

To start copying, apply air pressure to the third air port 11, reduce the air pressure of the first air port 8 to zero while maintaining the posture, and change from the locked state by the first chuck 5 to the second state. Open piston 4.

Next, when air pressure is applied to the second air port 7,
Since the first piston 2 is pushed up by the elastic body 3, the second piston 4 rises first, then the elastic body 3 is compressed to lower the first piston 2, and the first piston 2 and 2 and the piston 4 are pushed apart until the stroke 1 becomes zero.

When air pressure is applied to the second air port 7 and then air pressure is applied to the fourth air port 9, the first and second pistons 2 and 4 become elastic while the stroke l remains zero. The tip 1 descends while bending the body 3 and comes into contact with the work 13. The previous timings are set by a timer in a control device (not shown), and the air pressure of the third air port 11 is set to zero, and the third chuck 10 controls the spherical body 17.
When the lock is released, the welding torch 100 is allowed to move, and if there is a misalignment between the welding line 15 and the longitudinal axis 16 of the welding torch as shown in FIG. Sliding longitudinal axis 16
align with the welding line 15 and stop.

Then, by applying air pressure to the first air port 8 and the third air port 11 and pushing the first chuck 5 and the third chuck 10, the attitude of the welding torch 100 is maintained.

Next, the air pressure in the second air port 7 and the fourth air port 9 is made zero. The first piston 2 moves up by a stroke l due to the return force of the elastic body 3 and then stops.

By setting this stroke l to the distance between the tip of the tip (stylus) 1 and the workpiece 13,
This can be kept constant.

In this state, the positioning and tracing of the welding torch is completed, an arc is generated between the welding wire 14 and the workpiece 13, and welding is started or restarted.

The copying time for one cycle is as short as about 2 to 3 seconds, and by setting the start time of the copying operation using a timer, limit switch, or teach data, it is possible to perform intermittent copying operations in the left-right and up-down directions. By the way, in this embodiment, the spherical body 17 is supported by the arm 200 and can freely move in any three-dimensional position.
The posture of the welding torch 100 is fixed by air from the air port 11 of the welding torch 100 via the third chuck 10.
If the welding torch 100 is gripped by the part 2, the welding torch 100 can be freely positioned in any position based on the attitude control command given to the industrial robot.

Thus, according to the present invention, the following effects are recognized.

○ By automatically adjusting the amount of insertion and removal of the tip (stylus), it is possible to correct the amount of upward and downward deviation.

○B It is air-driven and does not require any actuator.

○C By integrating the tracing sensor (stylus) and welding torch, the device can be made smaller and weigh more.

○D Since there is no misalignment between the welding point and the copying point, the accuracy of the welding process is improved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a positional embodiment of the present invention. 1... Chip, 2... First piston, 3...
Elastic body, 4... Second piston, 5... First chuck, 6... Second chuck, 7... Second air port, 8... First air port, 9... Fourth air port, 10... third chuck, 11... third air port, 12... fulcrum, 13... workpiece, 14...
Welding wire, 15... Welding line, 16... Longitudinal axis,
17... Spherical body, 18... Shield gas passage, 1
00...Welding torch, 200...Arm.

Claims (1)

[Claims for Utility Model Registration] A first piston having a tip removably attached to its tip and supported by the tip of the torch so as to be able to slide in the axial direction of the torch; A second piston that is engaged with the first piston so as to slide according to the sensation between the workpiece and the chip during welding, and an elastic force that biases the first piston toward the second piston within the torch. a first piston for holding the second piston fixed in a moving position within the torch;
chuck, and a welding wire is led out from the center of a tip provided at the tip of the first piston through a hole bored in the axial direction of each of the second piston and the first piston. Copy processing equipment.