SU1207684A1 - Machine for resistance butt welding - Google Patents

Description

I

The invention relates to mechanical engineering, and specifically to equipment for resistance welding.

The aim of the invention is to reduce the metal capacity of the machine and to provide a gap between the welded ends before welding.

Fig, 1 shows the proposed machine; figure 2 - section aa in figure 1; in figs. 3 and 4, the position of the elements of the mechanism is clamped at the moment of clamping of the welded part and its release from clamping, respectively; in FIG. 3, section BB, in FIG. 3.

The machine contains precipitation cylinders 1, and 2, the sleeves of which are connected with guide rods 3 and 4, fixed on the fixed block 5, on which the movable block 6 moves, and the hydraulic cylinders of the precipitation are connected to the movable block 6. At the ends of the rods 3 and 45 connected, with sleeves of hydraulic cylinders 1 and 2, nuts 7 and 8 are screwed, which are stops and are in contact with the movable unit 6, and springs 9 and bushings 10 connected to the piston screw 11 are mounted on the end of the piston of the hydrochairs 1 and 2. 6 and fixed 5 blocks carry mechanisms to clamp with two pivotally connected clamping elements 12 and 13, between which the welded blanks 14 are clamped, in the bores of the elements 12 are located a hydraulic cylinder 15 clamping the blanks 14. At the end of the rod 16 of the hydraulic rod 15 are fixed a clamp 17 and a roller 18 connected by a flexible link (cable) 19 with a roller 20 mounted on the clamping element 13, made in the form of a folding bracket. Bracket 17 is pivotally connected to stem 16 by means of axis 21 (Fig. 5), which allows it to rotate in a vertical plane. The roller 18 is also connected to the bracket by means of an axis 21 and dowels. Therefore, when the brace 17 is rotated At a certain angle, the roller 18 rotates at the same angle, winding the cable 19 onto itself.

The machine works as follows.

The starting point for starting work is the position at which the movable block 6 is moved by means of hydraulic cylinders slump 1 and 2

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fixed block 5. Staples 17 are in a horizontal position and clamping the clamping elements 13 to the elements 12.

5 To release the movable unit 6 to its initial welding position, oil is pumped under low pressure into the rod end of the hydraulic structures of sludge 1 and 2. The piston of the hydraulic cylinder 10 moves up to the stop in the sleeve 10 and the spring 9. The force created by the hydraulic cylinder is less than the force required to deform the shuhuzhina. Thereafter, the staples 17 are re-blended vertically downward, while the elements 13 are mounted horizontally by means of a flexible link 19 attached to them and the rollers 18. The welded billets 20 are then laid, the brackets 17 are placed in a horizontal position and fixed on the clamping elements 13. To create a full clamping force, the oil is fed into the cavity C hydrotsin25 15. The elements 13 move to the left and clamp the blanks.

Weld workpieces are laid in such a way that after clamping they continue to contact with each other. Thereafter, oil is supplied to the rod cavities of the hydraulic cylinders of the sludge under pressure sufficient to deform the spring 9. The movable block together with the workpiece moves to the left against the stop to the nuts 7 and 8. The position of the nuts 7 and 8 determines the gap between the welding 1) 1 billets before welding . When oil is supplied to the piston cavity of the hydraulic cylinders of the precipitation, a welding process takes place. After welding, the pressure in the cylinders 15 is relieved, the brackets 17 are shifted to a vertical position, which corresponds to the opening of the elements 13. The machine is ready for the repeated welding cycle.

The use of the proposed machine allows to reduce the construction capacity by simplifying the hydraulic cylinder clamping, rejecting the levers, reducing the diameter of the hydraulic cylinder of the draft due to the use, in contrast to the oi of the prototype, of the piston cavity of the hydraulic section of the draft.

fi one

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position of sko-jbi on the nooow of the total 7S cylinder

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fig 5

Claims (1)

MACHINE'S FOR CONTACT BUTT WELDING, including movable and fixed blocks mounted on guide rods, one ends of which are fixed on a fixed block, clamping mechanisms with two pivotally connected clamping elements and clamping cylinders, upsetting cylinders, which differ in that , in order to reduce the metal consumption and provide a gap between the ends to be welded before welding, it is equipped with two stops, each of which is mounted on the free end of the corresponding guide rod with the possibility interacting with the movable block, the sleeve of each upsetting cylinder is connected to the free end of the corresponding guide rod and is equipped with a spring-loaded sleeve installed in it with the possibility of interaction with the piston end, the rod of which is installed to interact with the movable block, and each clamping mechanism equipped with. a bracket and a roller mounted on the same axis, pivotally mounted on the rod of the clamping hydraulic cylinder, an additional roller mounted on one of the clamping elements, made in the form of a hinged clip installed with the possibility of interaction with the bracket, and a flexible connection connecting the rollers to each other .. SU .... 1207684