CS252171B1 - Wire tube for wire feed - Google Patents

Abstract

Wire feed nozzle

Description

The invention is a wire feed nozzle of a welding device for welding internal and external rotary surfaces for under-atmosphere welding, which are used to weld bulky parts, especially non-rotating parts, without the need to position them.

The prior art nozzles consist of a fixed die, which is supplied by the source voltage, the gas inlet, the inlet and the outlet of the cooling water. The nozzle is mounted on a device consisting of a stand with a vertically adjustable carrier, provided with a pivoting bracket on a vertical pin, on which a semi-automatic welding machine is mounted, whose worm gear for driving the semi-automatic welding machine spindle is connected by a flexible shaft to the variator with its own rotary drive on which the welding nozzle is slidably mounted horizontally. In this welding method, not only the nozzle, which follows the inner or outer welded rotational surface, rotates, but also the welding wire coil, the drive feeder and the drive causing the rotational movement of the welding nozzle. To control and run the motors, the motor leads must be routed to the control box. The transfer of these leads from the rotating part to the stationary control box takes place through the slats and brushes, there are often failures, and this part is expensive to manufacture. Since it does not rotate only the nozzles, there is increased oscillation during welding, it is necessary to choose a higher rigidity of the equipment or to be satisfied with the reduced quality of the overlay.

These disadvantages of the prior art are substantially reduced by the use of a nozzle according to the invention. The welding wire is led through the die to the rotating body and the outlet neck. The rotatable body is mounted in a turntable in the body to which the gas inlet and cooling are supplied.

One possible embodiment of a welding nozzle according to the invention is shown in the drawing where a longitudinal section of the nozzle is shown.

The device consists of a die 1 with a supply voltage terminal 6, which is connected to a body 8 with a gas inlet 4 and a cooling water inlet 5, in which a rotatable body 2 with an outlet neck 3 is mounted on the rotary elements 9. and a nozzle holder 10 to a shaft 12 that performs rotational movement. Welding wire 13 is fed through shaft 12 from a magazine and feed device fixed to shaft 12 stationary.

Because the welding wire 13 is embedded in the rotatable body 2, it does not twist when the shaft 12 is rotated. The turntable elements 9 can be made, for example, of non-conductive materials. The inclination of the nozzle can be varied in the nozzle holder 10 as desired for welding. The welding radius can be changed by moving the nozzle holder 10 in the guide arm 11. The outlet nozzle 3 is replaceable and always allows the most suitable adaptation of the inert gas supply. For easier insertion of the welding wire there is a conical taper 7 in the rotating body 2.

The object of the invention can be used in the renovation or production of the overlay layer of the inner and outer rotation surfaces.

Subject

Claims (1)

Subject Nozzle for equipment for welding internal and external rotating surfaces, characterized in that the die (1) with the clamp (6) is connected to a body (8) to which only the gas inlet (4) and the cooling inlet (5) are connected and in the body (8), a rotatable body (2) with an outlet neck (3) is mounted on the rotary elements (9). 1 sheet of drawings