SU967713A1 - Apparatus for feeding wire - Google Patents

Description

(54) DEVICE FOR WIRE SUPPLY

The invention relates to welding and can be used for the automatisation of welding wire to the zone; welding.

A device for feeding welding wire, a motor, a gearbox and an eccentric feeding mechanism 1 is known.

The disadvantages of this device are large inertia when stopping or reversing the wire feed and reduced its reliability in operation.

. - The closest to the invention in its technical essence and the achieved result is a wire feeder containing. electric drive with wire oscillation mechanism and electromechanical wire clamps with power source t2j.

The drawbacks of the device are the impossibility of reversing the supply of welding wire, as well as a large inertial supply wire at the time of its termination.

The aim of the invention is to provide reverse wire feed, -, its smooth adjustment, as well as

high-speed stopping.

The delivered celb is achieved by the fact that in a wire feeder containing an electric drive with a wire oscillation mechanism and electromechanical wire clips with a power source, the clips are equipped with a phase-controlled power interrupt, the rotor of which is mounted on the electric drive shaft coaxially with the wire oscillation mechanism, and the stator has the possibility rotation about the axis of the rotor.

15

Fig. 1 shows a wire feeder; in Fig.2, a phase-controlled chopper circuit | power supply; on fig.Z - timing charts the wire.

20

The device consists of a drive (electric motor) 1, with the axis of which the crank mechanism 2 and the rotor 3 of the chopper are connected, which is connected to the power source 4 (rectifier) through the brush 5 and to the electromechanical clamps 6 and 7 through the brushes 8 and 9. Brushes 8 and 9 mounted on the stator 10 mounted coaxially to the rotor 3 on a common basis

30 with the ability to move around

axes relative to the rotor using the handle 11.

The electromechanical clips 6 and 7 consist of a winding 12, a core 1 and a core 14.

The rotor 3 of the chopper consists of an annular part with a brush 5 installed on it and collector plates with brushes 8 and 9 mounted to them at an angle of 90 to each other. limited by the angle fi72 and mounted on diametrically opposite sides of the collector,

The device works as follows.

When the drive 1 is turned on, the wire 15 communicates transverse oscillations of the crank mechanism 2 At the same time, the collector of the rotor 3 simultaneously connects the electromechanical clips 6 and 7 to the power source 4 via brushes 8 and 9, when connecting the coil 12 of the clamp 6 to the power source its measles 14 is drawn into the magnet body of the clamp b as a result of which the body is fixed between the core 14, the core 13 and the said body, the fixation in locker 7 occurs similarly. The holding of the body in one of the clamps occurs alternately for a time equal to T / 4 of one full period of transverse oscillations of the wire 15, as shown in diagrams 16 and 17, in this case, if the body moving point is dead, it corresponds to the position. brushes 8 and 9 on the collector rotor 3. (Figs 1 and 2), the maximum is observed at the body supply in the direction from the clamp 7 and 6, since during a quarter of the period when the clamp 6 is turned on and 7 is off, the body is pulled into the area between. clamps, and in the next quarter of the period of his pushing through the disconnected clamp 6 with clamp 7 turned on, limiting movement of the body in the opposite direction.

By changing the position of brushes B and 9 by turning the stator 10 at a certain angle vp relative to the dead point of the crank mechanism 2 between the periods of operation of the clamps 6 and 7 and the oscillations of the wire 15, a temporary mismatch of 1 41 / C is observed, as a result

during the T / 4 clamp 6, the body moves through the disconnected clamp J, first in the forward and then in the opposite direction, as a result of which the body feed by 5 between the clamps is equal to the difference of two displacements and amounts to S ((jj), (diagram 18).

The movement of the wire 15 through the clamp 6 is observed in the following T / 4

o (diagram 19), in the same way clamp 7 is turned on and clamp 6 is turned off (diagrams 16 and 17). As a result, the body is reciprocated twice in each period of transverse oscillation of the body, and the feed rate in each cycle corresponds to diagram 20 when the stator 10 changes position relative to the axis of the rotor 3,

0, body feed control is performed from the maximum feed in one direction to the corresponding feed in the other direction - tttcfx When feed is stopped, and the wire pulses in place, since the return movement of the body is direct.

The advantage of the proposed device is the ability to control the wire feed without stopping the drive, providing controlled wire feed in both directions, and also stopping the wire with high speed.

five.

Claims (1)

1. USSR author's certificate I 416193, cl. 23 K 9/12, 1971 (prototype).