SU923770A1 - Tungs for resistance spot welding - Google Patents

Description

The invention relates to welding, in particular to equipment for resistance spot welding.

Known pincers for contact spot welding, containing current leads, levers with electrodes, a drive for turning levers and spring-loaded contacts [1

A disadvantage of the known ticks is the rapid wear of the current collectors.

Known pincers for contact spot welding, containing current-supports with arms mounted on them, made with cylindrical cavities for accommodating contacts, interacting with them movable pistons and a power drive connected to one of the arms of the levers, on the other arms of which electrodes are installed (2 ].

The contacts of these tongs wear out quickly, since their activation takes place at the moment of switching on the welding current.

2

'The purpose of the invention is to increase the durability of contacts.

This goal is achieved by the fact that in pincers for resistance spot welding, containing current-leads with ball-shaped levers fixed to them, made with cylindrical cavities for accommodating contacts in them, interacting with them

u pistons and a power actuator connected to one of the arm arms, on the other arms of which electrodes are mounted, each of the contacts is made in the form of an elastic sleeve filled with hydro-medium with rigid tertires, one of which is fixed on the current lead, and the cavity of the sleeve is placed gidronagnegatel in contact with the movable piston.

FIG. 1 shows ticks, common

view; in fig. 2 is a section A-A in FIG. one.

Ticks are made up of tokopodsdov 1 and

2, fastened together by insulated studs 3 and made

923770

3

with holes in which the insulating zagtseessovany bearings 4, coaxially with them and on the outer faces of the current-supplying current feeders mounted in the bearing cover 5. 4 pivotally zakrep- ₅ levers 6 and 7 with Lena cylindrical cavities 8, each of which is placed a movable piston 9 and the elastic sleeve 10 with rigid ends 11 and 12. The ends 11 of sleeve 10 through covers 5 are fixed on fuel leads 1 and 2, and on the side of ends 12 in the cavities of sleeves 10 are placed hydraulic superchargers 13, which are spring-loaded with respect to covers 5. The bushings 10 are fixed hydro, 5 to 14, and an insulator 15 is installed between the levers. The shoulders 16 of the levers 6 and 7 are interconnected by a power drive 17, which is connected by channel 18 to the cavities 8, and on the other shoulders there are fish. 20 chagov installed electrodes 19. When applying the working environment in the actuator 17, the levers 6 and 7 are rotated in bearings 4, resulting in the electrodes 19 compress the welded parts 20. 25

At the same time, the working medium, passing through the channel 18, creates pressure in the cavities 8, as a result of which the pistons 9 through the hydraulic heaters 13 compress the hydraulic medium 14, which transmits the compression forces 30 to the inner walls of the elastic bushings 10. When a certain pressure of the hydraulic medium 14 is reached, the elastic bushings 10 enter close contact with the cylindrical walls of the cavity 8, after _{35 of} which the welding current is supplied, which through the covers 5, rigid ends 11 and levers passes from the current leads 1 and 2 to the electrodes 19, resulting in welding of the parts 20.

After welding, relieve the pressure of the working medium in the actuator 17, while the pistons 9 retreat to the initial position, and the sleeve 10 under the action of elastic forces, compressing, releases the levers, which freely return to the initial position.

Claims (1)

Claim Flares for contact spot welding, containing current leads with hinged levers on them, made with cylindrical cavities to accommodate contacts in them, movable pistons and a power actuator connected to one of the arms of the levers, on the other arms of which that, in order to increase the durability of the contacts, each of the contacts is made in the form of an elastic sleeve filled with hydro-environment with rigid ends, one of which is fixed to the current lead, and end sleeve placed in the cavity gidronagnetatel contacting the movable plunger.