SU1579681A1 - Arrangement for pulsed feeding of electrode wire - Google Patents

Abstract

The invention relates to welding, in particular to a device for pulsating supply of electrode wire to the welding zone. The purpose of the invention is the expansion of technological capabilities without increasing the radial dimensions of the speed programmer element and increasing reliability in operation. The device contains, as a programmer element, wire feed speeds, a stepped roller 8 mounted on the drive shaft, having sections 14 of a smooth transition from one step to another feed roller 2 and the clamping mechanism. The step roller is mounted with the possibility of axial movement, which provides interaction with all the steps and transition sections of the feed roller pressed to the step roller 2. The transition sections 14 can be made along a helical or other curved line depending on the operating conditions and the size difference of the step sizes. The transitional areas allow transition from low speed to high speed. The device allows the cycle of multipulse welding of any relatively long duration to be worked out. 2 Il.

Description

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The invention relates to welding, in particular to a device for pulsating supply of electrode wire to the welding zone.

The purpose of the invention is the expansion of technological capabilities without increasing the radial dimensions of the speed programmer element and increasing reliability of operation.

FIG. 1 shows the device, a general view; in fig. 2 is a view A of FIG. one.

The device for pulsating feeding of the electrode wire 1 contains a feed roller 2 and a clamping mechanism in the form of a pressure roller 3 with a pneumatic clamp 4. The axis of the delivery roller 2 is fixed on the bracket 5 pivotally mounted on the frame 6 The axis of the pressure roller 3 is fixed on the bracket 7, also hinged on frame 6. The element-program-change in the wire feed speed is a stepped roller 8, the rotation shaft of which by the coupling 9 is connected to the back of the electric drive 10, having the possibility of reversing. On the other side of the roller 8 is installed on the screw 11, mounted on the frame. Spring 12 roller 2 is preloaded to the stepped roller 8. The ends of the spring are fixed on the bracket 5 of the roller 2 and the bracket 13, rigidly fixed on the frame. The stepped roller 8 has sections 14 for the transition of one step to another. These sections can be made along a helical line with a variable turn diameter or other curve, as well as along an inclined straight line (not shown) depending on the operating conditions and the magnitude of the difference in the radial dimensions of the roller steps 8. On the surface of the steps, and in some cases teeth can be cut at transition sites or rubber coating or another coating that improves adhesion can be applied (not shown). The feed roller 2 may have a roller 15 attached to its axis 15 of the same diameter with it, mounted so that the lever is located between them. The roller 2 in the operating mode rolls on the steps of the roller 8 during the ascent along the transition to a larger diameter, it is the feed, and the roller 15 during the descent is the smaller diameter and is a satellite.

It is possible to install the drive and the stepped roller rigidly without a clutch, with the possibility of moving the roller drive along the screw 11. It is also possible to move the drive and the roller with the screw fixed on the roller with the gear to rotate the worm wheel and move due to its rotation. There are options when the feed and pinch rollers are spring-loaded between each other and together move away from the stepped driving roller or, conversely, the driving roller can move away.

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The device works as follows. The roller 3 pneumatic clamp 4 is pressed to the feed roller 2. Include the actuator 10, which through the clutch 9 transmits rotation

on roller 8, which, when rotated, makes an axial movement, twisting on screw I. Spring 12 presses radik 2 to roller 8. Starts supplying electrode wire 1 passing between rollers 2 and 3 to a welding torch (not shown) according to the program, given by the dimensions of the steps of the roller 8 and its transitional sections 14. High revolutions of roller 2 can be reported at relatively small maximum distances from the center of rotation and, accordingly, to obtain a low speed, the corresponding steps can be fulfilled as small as needed. m. Depending on the duration of the movement at a given speed, the size of the step along the axis and other necessary parameters are determined. If it is necessary to drastically change the speed, the transition section can be made of a large steepness or even straight, etc. (not shown). Wire 1 at a certain speed is fed to the welding torch for a certain time. Depending on the size of roller 8, rollers 2 and 3 are rejected on brackets 5 and 7. Depending on the program, roller 15 is inserted into interaction with roller 8 by roller 8 - roller 2 satellite. At the end of the cycle roller 8 drives to the limit switch (not shown), when triggered, the reverse of the actuator 10 and the pneumatic cylinder 4 are activated, which take the pinch roller 3 out of interaction with the feeder roller 5. 2 In this mode roller 8 returns to its original position before it hits the second limit switch, which again presses p 3 face to the roller 2 and reverses the actuator 10.

0 The device is ready for the next cycle. The device provides the ability to work in a long multi-pulse process, in particular for spot arc welding with electric rivets with high reliability in operation.

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Claims (1)

Invention Formula A device for pulsating electrode wire feed containing a pressure roller, a feed roller and a drive 0 rotation with a wire feed speed programmer element mounted on its shaft and a clamping mechanism, characterized in that; In order to expand technological capabilities without increasing the radial dimensions of the speed programmer element and increase reliability, the speed programmer element is made in the form of a stepped roller with areas of transition from one stage to another, installed with the ability to interact with the feed roller, and the feed and step rollers are installed with the possibility of mutual axial movement.