SU1286369A1 - Torch for arc welding with non-consumable electrode - Google Patents

Abstract

The invention relates to electric arc welding with a non-consumable electrode in a protective gas environment and can be used in welding machines for argon-arc welding with short seams or for argon-arc spot welding. The purpose of the invention is to increase the productivity and quality of welding. When a voltage is applied to the electromagnet 18 of the power supply source, the magnet 17 of the electromagnet presses the nut 14 through the lever 16. 5 with the electrode 4 continues to move until it touches the electrode 4 with the product. After the electrode 4 is lowered onto the product, the voltage and current in the electromagnet 18 decrease to zero, and the collet holder 5 together with the clamp

Description

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volume and electrode 4 is lifted until it is locked into the nut 19. Further movement of the collet holder 5 stops, since

this prevents the seizure itself. The spring 9 through the separator 7 wedges the balls 8 in the housing 6. 1 hp; f-ly, 1 ill.

The invention relates to electric arc welding with a non-consumable electrode in shielding gases and can be used in welding machines for argon-arc welding with short seams or argon-arc spot welding with a tungsten electrode.

The purpose of the invention is to increase the productivity and quality of welding.

The drawing shows the proposed burner, a general view.

The burner contains a supporting nozzle 1, made with a cooling jacket 2. The burner includes a collet 3 for securing the non-consumable electrode 4. The collet 3 is installed in the collet holder 5. On the collet holder 5 there is a ball grip consisting of body 6, separator 7, clamping balls 8, spring 9 and adjusting screw 10. On the shirt 2, the cup 11 with the adjusting nut 12 is fixedly fixed. The carrier is 5 spring-loaded by the return spring 13 and is equipped with a clamping nut 14. The carrier is 5 with a cooling jacket that is connected to the water supply fitting 15.

The holder of the carrier 5 is connected via a lever 16 to the core 17 of the electromagnet 18 of the contact excitation of the arc. The burner includes a nozzle 19 for supplying a protective gas and a current supply 20. A cooling nozzle 1 of the cooling nozzle 1 is connected to a water inlet nozzle 21. The grip is equipped with a lever 22, the end of which extends from the slot made in glass 11.

The reference nozzle can be equipped with a burner installation sensor on the product, which gives a signal to turn on the magnet. The cooling jacket is electrically connected to the glass. The grip is pressed against the nut of the cup by the action of a recoil spring through the Caliper. The gripping spring acts on the separator and presses the balls against the gripping body and the collet holder. The cooling water is expelled through additional nipples.

Before performing the welding cycle after installing the collet holder 5, it is necessary to put the torch on the product without turning on the power source, lower the lever 22 (the grip is lowered, the balls 8 wedge) and lower the holder 4 until it touches the product, then release the lever Under the action of the return spring 13, the Carrier Holder 3, together with the grip, rises up to the stop of the grip into the nut 12 for adjusting the arc length. The burner is ready for operation.

welding cycle.

When a voltage is applied to the electromagnet 18 of the power supply source, the magnet 17 of the electromagnet presses the nut 14 through the lever 16. electroloch 4 continues to move until it touches the electrode 4 with the product. After lowering the electrode

4 to the product, the voltage and the current on the electromagnet 18 decrease to zero and the collet holder 5, together with the gripper and electrode 4, rises up to the stop of the gripper in the nut 12. The further movement of the collet holder 5 stops, since

0 grip, spring 9 through the separator 7 wedges the balls 8 in the housing 6.

Thus, the stroke of the grip from the bottom stop to the top determines the arc length set by the nut 12. In the process

5, the electrode is shortened due to melting and the arc length increases, which is compensated for by an additional stroke of the collet holder 5 together with the electrode 4 downwardly relative to the grip after the latter touches the bottom stop (cup 11) during the initiation of the arc. Consequently, the required arc length is set automatically at the beginning of the welding cycle, which allows for high repeatability of the welding cycle parameters and stability of the welding quality.

5 The device does not require any alterations in the electrical circuit of the welding machine and ensures high reliability of operation. When setting the arc length, no special patterns are required, and the time for replacing the colander and electrodes is significantly reduced.

Lever 22 is needed when setting up the device and changing the electrode. By pressing the lever 22 and lowering it, the gripping balls 8 are wedged and the pick-holder 5 os5 is liberated. The principle of the gripping is that, by jamming the balls 8 between the gripping body 6 and the collet holder body 5, the gripping separator 7 and spring 9 keep the collet holder 5 from moving upwards

to capture. The lever 22 facilitates the change of the electrode.

The proposed burner design allows you to automatically set the desired arc length and maintain it during burner operation.

Claims (2)

1. A torch for arc welding with a non-consumable electrode, containing an electromagnet of contact excitation of an arc, connected with an electrode holder, under spring-loaded return spring, as well as a nozzle with a cooling jacket, characterized in that, in order to increase the productivity and quality of welding, it is equipped with a ball pick-up mounted on the electrode holder and mounted on the cooling jacket with an adjusting nut, the holder is located inside the glass. 2. The burner according to claim 1, characterized in that a lever is fixed on the gripper, and the glass is made with a slot, in which the protruding end of the lever is located