SU1500446A1 - Apparatus for automatic arc welding - Google Patents

Abstract

The invention relates to welding, in particular, to devices for automatic arc welding, and can be used in welding multi-shaft seams. The purpose of the invention is to simplify the design of the drive mechanism for moving the welding torch across the seam and increase its reliability. On the guide 1, a carriage is mounted on which a hinged-lever mechanism is mounted. Welding torch 3 is fixed on link 6 of this mechanism. Welding torch 3 is moved across the weld when its rollers are applied by bending during heating and straightening during cooling plate springs 8 made of a material that has a shape memory, for example, titanium nickelide. The heating of the springs is carried out from electric heaters 9. The number of pairs of springs 8 is chosen to be equal to the number of positions of the welding torch 3. 2 Cp f-ly, 2 ill.

Description

: l

1500446

The invention relates to a pairing, in particular to automatic devices for arc welding, and can be used in welding many

IRON BREAK

The aim of the invention is to simplify the design of the drive mechanism for moving the welding torch across and to increase the reliability of its operation.

tfa of FIG. 1 shows the device, obiy view; in fig. 2 - kinematic diagram of the device.

The device for arc welding contains a guide 1, a carriage 2 mounted on it, a movement of a welding torch 3 rigidly connected with a pivot-lever mechanism 4 mounted on the carriage 2 and consisting of a horizontal link 5 and a link 6 deviated from the vertical axis at an angle of 10-25, This angle is determined experimentally. At an angle of less than 10 °, malfunctions of the device were observed, and at an angle of more than 25 °, the device is operational, but this leads to an unjustified increase in the dimensions of the device,

The lever mechanism is designed to move the burner across the gap. Link 6 and 5 of the hinge-lever mechanism 4 have screw adjustable stops 7 in an amount equal to the number of rollers in the seam. Under every smoke. a screw emphasis on the carriage body 2 is fixed on a plate spring 8 with an electric heater 9. The leaf springs are made of a heat-sensitive metal having 40 shape memory, for example, titanium nickelide (54-56% nickel, the rest is titanium, 10 cycles of shape change response 70 ° C, return temperature 45 100% of the form).

The device for arc welding works as follows.

Guide 1 is oriented for

50

welding the first bead of the weld

on the product., U, After welding the first roller, the heaters 9 of the leaf springs 8 of the first pair of screw stops are turned on 7. The leaf springs. 8, under the influence of heating (above + 70 ° C), change their shape and, from the position a, shown in FIG. 2, with a dotted line, go to state b, according to

This is indicated by the solid line and affects the stops 7 of both links of the hinge-lever mechanism, which is why the welding torch 3 as a result of the addition /, the movement of the links takes the position corresponding to the welding of the second bead of the seam.

After welding the second roller, the heating of the first pair of plate springs is turned off and they, cooling (below +40 C), take the initial position (a), simultaneously the heaters of the next pair of plate springs turn on and the welding torch takes the position for welding the third roller and ,

The use of the invention will simplify the design of automatic welding machines for multilayer welds by eliminating the electromechanical drive, reduce the cost of manufacturing the proposed device, as well as improve the reliability of the device by eliminating rotating and moving parts, reduce maintenance costs and manufacture of spare parts.

F o rmu l and 30 brethren

Claims (3)

1.A device for automatic arc welding, mainly multi-shaft welds, containing a guide, a carriage mounted on it, mounted on a carriage a hinge-lever mechanism for moving the welding torch across the seam, a drive of a hinge-lever mechanism, including adjustable stops, a welding a burner mounted on a link of the hinge-lever mechanism for its movement, characterized in that, in order to simplify the design of the drive mechanism of the movement of the welding torch and increase its operation reliability, The hinged-lever mechanism is made in the form of plate springs made of a heat-sensitive material with memory, shape, and electric heaters according to the number of springs. 2. A device according to claim 1, characterized in that the leaf springs are made of titanium nickelide, 3. A pop device, 1, characterized in that the adjustable stops are mounted on the links of the hinged-lever mechanism. Yu Fig. /