SU1180207A1 - Friction-welding machine - Google Patents

Abstract

MAIIMHA FOR WELDING WITH DIRECTION, containing a frame, a rotational drive, an electromagnetic axial force actuator, which operates on a singing current. made into a videdelement associated with a rotational drive and a clamping device for a rotating part with a shaft, and an electromagnetic coil mounted on a shaft with a gap relative to the core, ensuring their magnetic interaction, and a clamp for a non-rotating part, characterized in that expansion of technological capabilities, it is equipped with a mechanism for axial movement installed in the form of an external wedge, which is installed with the possibility of interacting with a clip for a non-rotating part, n which podpruel zhinen relative to the frame.

Description

The invention relates to welding, and in particular to devices for friction welding.

The purpose of the invention is the expansion of technological capabilities. 5

This goal is achieved by the fact that the clamp for a non-rotating part is equipped with a mechanism for its axial movement, which makes it possible to compensate for the shortening of parts during welding, and to weld parts of large sections.

The drawing schematically shows a machine for friction welding.

The machine contains a frame 1, in the bearings 2 and 3 of which a shaft 15 4 is installed, having the possibility of axial movement. At the end of the shaft 4, the spindle 5. is fixedly fixed with a clamp 6 for. rotating parts 7. In the middle part of the shaft 4, a wire 8 with a coil 9 is placed with a gap of magneto 20, rigidly connected to the bed 1 and core 10 is rigidly connected to the shaft 4.

On the splined part 11 of the shaft 4, there is a brake drum 12 with 25 boats 13 and an associated electromagnetic clutch 14, which on the other hand is connected to a pulley 15, which is placed with a clearance on the shaft 4 and serves to drive the drive through a belt drive from an electric motor (not shown).

At the other end of the shaft 4, made threaded, there is a sleeve 16, pressed by its shoulder through the elastic element 17 and the washer 18 with the nut 19 to the inner rotating ring of the rolling bearing 2.

Coaxially rotating part 7 in the clamp 20, mounted with the possibility of movement on the guides 21 of the frame 1,. fixed non-collapsible part 22. In this case, the clamp 20 abuts against its wedge 23, spring-loaded in the upper part by a tension spring 24 and connected to the armature 25 of the electromagnet 26 mounted on the frame 1.

‘The machine operates as follows.

When the electromagnet 26 is turned on, the anchor 25, attracting, moves the wedge 23 downward, stretching the spring 24. Details 7 and 22 are fixed in clamps 6 and 20, respectively, so that their end surfaces touch & touch, after which the electromagnet 26 is turned off.

Then, an electric motor is turned on, which, through a belt drive, unwinds a pulley 15 connected through an electromagnetic clutch 14 to a shaft 4, which, when turned on, rotates the drum 12 and the shaft 4 with all the parts attached to it.

When a certain number of revolutions is reached, the coil 9 is connected to a source of pulsating or alternating current and, under the influence of electromagnetic force at the moment of a current pulse, the core 10 is attracted to the magnetic circuit 8, the shaft 4 moves and the elastic element 17 is compressed, resulting in a junction axial force occurs.

After the cessation of the electromagnetic force and the disappearance of the current pulse, the shaft 4 under the action of the elastic element 17 moves in the opposite direction.

The oscillating movement through the non-revolving part 22 and the clamp 20 is transmitted to the wedge 23, which, moving under the action of the spring 24, as the parts 7 and 22 are shortened, compensates for the draft during welding by moving the non-rotating part 22.

Before the end of the welding process, the clutch 14 is turned off and the brake drum 12 under the action of the pads 13 provides a quick braking of the shaft 4. After this, forging by further passing the current through the coil 9 follows.

After receiving the welded joint, an electromagnet 26 is turned on, which moves the wedge 23 downward, as a result of which it becomes possible to release the welded parts 7 and 22 from the clamps 6 and 20.

In addition to conventional welding, inertial welding is also possible. In this case, after untwisting the shaft to a certain number of revolutions and accumulating the necessary kinetic energy, the electric motor is turned off, and the shaft with all parts attached to it continues to rotate by inertia. The joint heating of parts is achieved in the same way as in the conventional method, and forging, in contrast to the conventional method, is carried out during rotation, i.e. without braking the rotating parts.

Claims (1)

Friction welding machine containing a bed, a rotation drive, an axial-force electromagnetic drive operating on alternating current, made in the form of a core connected with a rotation drive and a clamping device for a rotating part with a shaft, and an electromagnetic coil mounted on the shaft with a clearance relative to the core, providing their magnetic interaction, and a clamp for a non-rotating part, characterized in that, in order to expand technological capabilities, it is equipped with an installed in interacting with a clamp for a non-rotating part by an axial movement mechanism made in the form of a drive wedge, one end of which is spring-loaded relative to the bed. 1 L80207 2