SU1000203A1 - Apparatus for automatic electric arc welding of butt connections - Google Patents

Description

The invention relates to welding equipment and can be used to equip automatic welding machines for electric arc welding of thick metal into slotted grooves.

A device for automatic arc welding of butt joints, comprising a mechanism for adjusting the position of the electrode wire relative to the groove, is known in the form of a carriage mounted on a guide rail on which a bracket with copy rollers is mounted.

A disadvantage of this device is the impossibility of adjusting the position of the electrode wire during welding in a narrow or slotted groove, since in this case the groove surfaces are parallel to the copier rollers and their reliable contact is not ensured with variations in the groove width.

Closest to the present invention is a device for automatic arc welding of butt joints, comprising a driving carriage mounted on a carriage with the possibility of rotating the carriage, on

where the welding torch and the welding torch guide mechanism are mounted along the junction, made in the form of a bracket fixed on the carriage, guides mounted on it, movably mounted on an additional bracket guides and a spring-loaded rotary bar fixed on it,

10 at the ends of which the plows are mounted with the guide rollers L2J mounted on them rotatably.

However, the known device does not provide a sufficiently high quality of the weld due to the instability of the electrode out- put, due to the fact that both guide rollers are spring-loaded.

The purpose of the invention is to increase the quality of the weld by stabilizing the emission of the electrode.

This goal is achieved by the fact that in the device for automatic electric arc welding of joints, the drive carriage mounted on the carriage can be rotated the carriage on which the welding torch and the welding torch direction mechanism are mounted, made in the form of a bracket mounted on the carriage guides mounted on it, an additional bracket movably mounted on the guides and a spring-loaded swivel bar fixed on it, at the ends of which Fingers are fitted with rollers mounted on them with the possibility of rotation, one of the fingers is fixed on the turn bar rigidly, and the welding torch is mounted on the carriage with the possibility of movement in the axial direction. Fig. 1 shows a device for automatic welding, the general view of Fig. 2 is a mechanism for adjusting the position of the electrode wire, a general view; in FIG. 3, view A in FIG. The device comprises a driving carriage 1, a carriage 2 on which a welding torch .4 is mounted for vertically moving along its guide grooves 3, an electrode wire feeding mechanism 5 and a mechanism 7 for adjusting its position relative to the partition. The correction mechanism 7 comprises a bracket 8 having transverse guides 9 and 10 and rigidly mounted on a rod 11, which can be moved parallel to itself in the cage 12 by the action of the pressure spring 13. To the bracket 8 with the possibility of adjusting vertical movement and fixation. the position using a screw 14 is rigidly fixed welding torch 4, is isolated from the bracket 8 by an insulating ring 15. The guide 9 is set on a scale of 16. On the transverse guides 9 and 10 there is an additional bracket 17 with the possibility of shifting and fixing it in a given position with the help of the lead screw 18. On the bracket 17, the hinge 19 secured the pivot bar 20, which, under the action of the spring 21, turned perpendicularly to the direction of movement of the entire device. The pins 22 and 23 are fastened parallel to each other on the turn bar 20 and can rotate around their axis. The finger 23 is spring-loaded with a spring 24. The fingers 22 and 23 at the end are equipped with follow-up roles 25 and 26, made in the form of two truncated cones. The device works as follows. In the Preparing for welding position, the follower rollers 25 and 26 of the external correction mechanism 7 are compressed and inserted into the slotting groove before contact with the groove walls. The hinge 19 at the same time occupies a position in the middle of the cutting. Under the action of the spring 13, the roller 25 is pressed against the surface 27 of the parts to be welded, and the spring 24, compressing, presses the roller 26 also to the surface 27. The welding torch 4 is installed at a certain height f above the surface 27 and rigidly fixed by a clamping screw 14 to the bracket 8 Moving along the guides 9 and 10 the bracket 17 using the lead screw 18, install the welding torch 4 and, therefore, the electrode wire b exactly in the center of the groove. This completes the preparation of the device for automatic electric arc welding. After the welding arc is ignited and the driving carriage 1 is turned on, the rollers 25 and 26 move together with the welding torch 4 during the cutting process. When the width of the gap gap changes, the followers rollers 25 and 26 change their position by constant action of the spring 21. The cutting walls causing displacement of the turn bar 20 around the hinge 19. Since welding torch 4 is rigidly connected to hinge 19, then any turn of the strap 20 will weld the welding torch. 4 and, therefore, the electrode wire will be exactly in the middle Christmas tree. With a vertical displacement of the surface 27, the roller 25, which rests tightly on it under the action of the spring 13, compensates for this displacement by a vertical movement of the spring-loaded rod 11 and, consequently, a vertical movement of the welding torch 4 fixed on the bracket 8 and installed with the possibility of vertical movement relative to the carriage 2. Therefore, the amount of emission E of the electrode to the surface 27 of the parts to be welded, which is set before welding, remains constant during the welding process, while the electrode wire Lock 6 is exactly in the middle of the groove width. I The application of the proposed device for automatic electric arc welding into slotted butt joints will improve the quality of welding joints by maintaining the specified parameters of the welding mode, labor productivity by reducing the amount of weld metal and saving welding materials. Using the proposed method of electric arc welding in enterprises will provide an annual economic effect of about 5.86 thousand rubles. Formula of the Invention A device for automatic arc welding of butt joints containing a driving car, setting up a ria carriage with the possibility of turning a carriage on which a welding torch is mounted; Ka and a welding torch guiding mechanism made in the form of a bracket mounted on the carriage mounted on of guides, movably mounted on the guides of the Additional bracket on and secured via it a torsion bar, at the ends of which fingers are mounted, with put on them with the possibility of raising with the guide rollers, so that, in order to improve the quality of the weld by stabilizing the electrode, one of the fingers is fixed on the turn plate rigidly, and the welding torch is installed on the carriage with possibility of movement in the axial direction. f Sources of information taken into account in the examination 1. The author's certificate of the USSR 607687, cl. At 23 K 37/02, 07.07.75. 2. Authors certificate of the USSR 82304, cl. At 23 K 37/02, 07/06/79 (prototype).

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Claims (2)

Claim A device for automatic electric arc welding of butt joints, comprising a drive trolley mounted on a trolley with the possibility of turning a carriage, on which a welding torch and a welding torch guide mechanism along the joint are mounted, made in the form of an arm fixed to the carriage, mounted on it with guides mounted movably on guides of the Additional bracket and the spring-loaded rotary bar fixed on it, at the ends of which 15 fingers are mounted, with the rotation of the guide rollers, it is noteworthy that, in order to improve the quality of the weld by stabilizing the stick out of the electrode, one of the fingers is rigidly mounted on the turntable and the welding torch is mounted on the carriage with the possibility of axial movement . from Sources of information taken into account during the examination 1. USSR author's certificate No. 607687, cl. B 23 K 37/02, 07/07/75. 2. USSR copyright certificate! ” 823046, cl. In 23 K 37/02, 07/06/79, (prototype). Feature 2 .1000203 Fig.Z