RU1801711C - Electrode wire pulse feeder - Google Patents

Abstract

The invention can be applied in welding machines where it is necessary to change the feed rate of the electrode wire during the welding process. The device comprises feed and pinch rollers, a drive drive for rotating the feed roller, a drive drive shaft and a mechanism for changing the wire feed speed, a mechanism for changing the feed speed is made in the form of a ratchet wheel mounted on the shaft of the feed roller and mounted on the shaft to rotate the lever with a ring on which are mounted dogs with which the ratchet wheel interacts. The lever arm is connected on one side with a drive link, which, if necessary, increase the speed, the lever is sharply turned in one direction, the arm is secured against rotation on the other side, and the shaft is connected by rotation of the feed roller by means of a ratchet clutch. Thus, at a constant feed rate, the ratchet wheel slides relative to the lever, and when the speed increases, the ratchet clutch slides. 2 ill. (L

Description

The invention relates to welding, and in particular to devices for pulsating feed of electrode wire into a welding torch.

The purpose of the invention. is simplification of design and expansion of technological capabilities.

In FIG. 1. The general view of the device is shown; in FIG. 2 is a section AA in FIG. 1.

The device comprises a drive feed roller 1 mounted on the driven shaft 2, and a pressure roller 3 pressed against it, between which the electrode wire 4 is fed into a welding torch (not shown). The driven shaft 2 is connected to the drive shaft 5 of the rotation drive by a ratchet clutch including a driven 6 and a driving 7 of the coupling half. The coupling half 7 mounted on the shaft 5 is longitudinally movable and spring loaded with a spring 8 relative to the driven coupling half mounted on the shaft 2. The device has a wire feed acceleration mechanism including a ratchet mounted on the shaft 2 of the feed roller 1 and mounted on the shaft 2 with the possibility of the rotation of the ring 10 with the lever 11 fixed on it. On the ring U, there are dogs 12 interacting with the ratchet wheel 9. On the side of the lever 11 opposite to the direction of movement of the feed roller, on the housing 13 replay stop 14 in the form of a screw, screwed into one of the holes 15 of the housing. On the other hand, the lever 11 is connected by a pivot link 16 to a link 17. having a drive in the form

w

for example, hydraulic, pneumatic or electromagnet.

The device operates as follows,

The movement from the drive shaft 5 is transmitted to the drive coupling half 7. Which, being a spring-loaded spring 8 to the driven coupling half b, engages with it, and rotation is transmitted through the housing 13 along the shaft 2 to the feed roller 1, which, when the pressure roller 3 is pressed against it feeds the welding wire 4. Simultaneously with the feed roller 1, the ratchet wheel 9 rotates, which, when rotated inside the ring 10 by the flat side of the teeth, raises the dogs 12. If necessary, give a large impulse, an instantaneous large force is applied from the hydro- a cylinder or an electromagnet (not shown) to track 17. The force of OttWuy 17 is transmitted through link 16 to the lever 11, ring 10 catches the ratchet wheel 9 in its rotation, the dogs 12 engage with the wheel 9 and rotate it with increased speed . The length of the wire supplied by this pulse depends on the location of the screw 14 in the holes 15, in which the shoulder of the lever 11 abuts. Accelerated rotation is transmitted through the shaft 2 to the driven coupling half 6, which, accelerating the rotation with respect to the driving coupling half 7, disengages from her. The coupling half 7 moves along the shaft 5 and compresses the spring 8. After completing the acceleration, the ring 10 stops, and the driving coupling half 7

and

under the action of the spring 8, it engages with the driven coupling half 6. The time taken to equalize the rotation speeds of the coupling half 6. 7 is spent on restoring the arc length.

The advantages of the proposed device over the prototype are in providing an instant increase in wire feed speed, expanding technological capabilities without increasing the dimensions of the device.

Claims (1)

SUMMARY OF THE INVENTION A device for pulsed feeding of an electrode wire, comprising a housing, a feed roller mounted on a shaft, a drive for rotating it, a pressure roller and a mechanism for changing the feed speed of the electrode wire, characterized in that, in order to expand technological capabilities, a mechanism for changing the feed speed The electrode wire is made in the form of a ratchet wheel with itself, a lever and a ring rigidly connected to it, stops, a drive rod and a ratchet coupling 25, while the ratchet wheel is mounted on the shaft and JCOMM associated with the feed. with a roller, the dogs are mounted on the ring with the possibility of interacting with the ratchet wheel, the ring is mounted On the shaft with the possibility of rotation relative to it, the lever is pivotally connected to the drive rod, the stops are fixed to the housing with the possibility of contacting with the lever, and the shaft is connected to the rotation drive by ratchet clutch. YU fifteen twenty thirty 35 Ri. 2