SU1227393A1 - Automatic welding device - Google Patents

Description

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The invention relates to welding, in particular, to devices for automatically guiding a welding tool along the interface of the products to be welded, and can be used in mechanical engineering, in particular in automatic welding tractors when welding with a thin sheet metal (thickness less than 3 mm) or butt joints connections with narrow groove edges for welding, for example, when welding bottoms with a sheath dI.

The aim of the invention is to improve the quality of the weld by ensuring reliable tracking of welding welds of overlapped joints with a thickness of the top sheet of less than 3 mm and butt joints with narrow edges.

Fig, 1 shows a device for welding; in fig. 2 is a view A of FIG. 1; in fig. 3 shows a section BB in FIG. one; Fig, 4 - section bb In Fig, 2; in fig. 5 is a section of YYD in FIG. one.

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The device contains fixed on traverse 1 with the ability to move in vertical and horizontal direction: base 2 with a fork 3, on which a supporting roller -t is mounted for rotation, in contact with the welded product - shell 5, forming the top sheet of an overlap joint, as well as the carriage 6 with copier rollers 7, hingedly connected with the magnitude of rotation in the horizontal plane with a guide prism 8 installed with the possibility of horizontal movement between two pairs of figured rollers 9, mounted for rotation on axles x 10, mounted on base 2. To secure the carriage 6 with the rollers 7 to the end 11 of the shell 5, the prism 8 is spring-loaded relative to the base by means of an extension spring 12, one end of which mounted on the base and the other on the prism 8. On the carriage b on each side of the swivel 13 of it with the prism 8 there are two curved copy rollers 7. The copy rollers 7 are mounted with the possibility of rotation of the axes 14 spring-loaded forks 15, the rods 16 of which installed with the possibility of re escheni in vertical holes 17 of the carriage 6. Thus forks rods 5 bear

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The rollers D and E, located on the carriage 6 on one side of the hinge 13, are interconnected in the upper part by the hinge bar 18, and the rods of the forks 5 of the bearing rollers J and I, which are on the other side of it, are connected by another hinge bar 19. The welding torch 20 is installed in the vertical hole 21 of the carriage 6 with the possibility of vertical movement relative to the carriage. The hole 21 is made with a minimum clearance relative to the burner, and its axis is located in the plane of the carbon surfaces 22 of the rollers 7, as a result, the axis of the burner 20 is also located in the plane of the copier surfaces 22 of the rollers. The burner 20 is provided with a support surface formed by a plate 23 rigidly connected to it, and on base 2 a jet system is installed to create an air cushion under the specified support surface, providing aerodynamic ascent of plate 23 with burner 20 when air is applied and configured as a cantilever mounted on base 2 under the slab 23 of the hollow element 24 with a grill 25 and a nozzle 26 for supplying air.

The device works as follows.

After the air is supplied through the nozzle 26 into the cavity of the hollow element 24 and the optimum discharge mode of the jets from the grid 25 is created, this creates an air gap between the grid and the burner plate 20, i.e. the air cushion, the machine shifts the base 2 fixed on it for some distance from the joint to be welded and, lowering it to the contact of the support roller 4 and the copier rollers 7 with the top of the shell 5, moves the base 2 and the knit: the carriage with it 6 seconds rollers 7 to their original position. In this case, the copier surfaces of the 22 figured rollers 7 are in contact with CTbiKONt and pressed against the end face 11 of the shell 5 under the action of the spring 12, and the burner 20 is set to the welding position. After starting the rotation mechanism of the shell 5 with the preassembled bottom adhered to it, the copier rollers 7, pressing against the end 11 of the shell 5, copy the joint, and the carriage 6 leads in accordance with the predetermined rollers

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, 7 with the direction set in its hole 21 welding torch 20, providing the necessary position of the electrode. If on the way of the rollers 7 there is an assembly (tack) seam or an influx, then the first of a pair of rocks 7 (roller I), overcoming the impact of the spring that presses the plug 15 to the product being welded, freely rolls through it, holding the hinge bar 19 in the given direction, a second roller B and a pair of rollers D and E, located on the other side of the hinge 13 of the carriage 6 with the prism 8, while the axis of the welding torch 20 continues to be in the plane of the copier surfaces 22 of the rollers 7, ensuring a high quality weld. Since the roller W remains in engagement with the end face 11 of the shell 5, on each side of the hinge joint at least one roller 7 is in engagement with the joint (in this case, roller W and Roller D and E on the other). The same happens when moving through the assembly tacking other videos. This eliminates the possibility of rotation of the carriage 6 with the rollers 7 around the swivel 13 with the rollers out of engagement with the joint, regardless of the thickness of the shell 5, which increases the reliability of tracking the joint of the carriage 6 with the burner 20. Installing the rollers 7 on the spring-loaded forks 15, the rods of which Mounted in the slots of the carriage 6 vertically and pairwise connected to each other, it provides the greatest accuracy in tracking the welding joint. Since the welding torch 20 is installed in the hole 21 of the carriage with a gap allowing it to be vertically moved, the torch is suspended above the base 2 on an air cushion, the weight of the torch 20 with hoses and cables (not shown) attached to it is not transferred to the carriage 27739

6, and on the base 2 with the support roller 4, and the burner suspension allows the burner 20 to move relative to the base 5 2 without friction. As a result, the weight of the node with roller 7 and the force with which it must act on the welding torch 20 is significantly reduced. The required force of the spring 12, which prepares the copier rollers 7 to the end face 11 of the shell 5, decreases accordingly. 7 from engagement with said end under the action of spring 15 12 forces at end height 11 less than 3 mm, and consequently, increases the reliability of tracking the welded joint. Turning the carriage with the rollers around the swivel 13 allows to ensure reliable tracking of the joint during operation of the device, as well as to improve the accuracy of tracking. As a result, the quality of the weld is improved when welding overlapped joints 25 with a top sheet thickness of less than 3 mm. The same thing happens when welding butt joints with fine grooves for welding.

Thus, ensuring reliable engagement of the cam rollers with the joint by preventing the carriage from rotating the rollers around the hinge joint, as well as using aerodynamic means of unloading the copiers from the masses, the burner and hoses, create a flexible system for tracking the joint, increase reliability devices for welding of products from thin-sheet Q metal with a thickness of less than 3 mm, which significantly improves the quality of the weld, reduces the possibility of the welding torch escaping from the butt line and also reduces the work capacity of the weld by approximately 15% due to the exclusion of work on the correction of welding defects.

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Compiled by I. Dergalev Editor M. Tsitkina Tehred N. Vonkalo Corrector O. Lugova

Order 2247/14 Circulation - 1001, Subscription

VNIIPI USSR State Committee

inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and printing company, Uzhgorod, st. Project, 4

phases. five

Claims (1)

A DEVICE FOR AUTOMATIC WELDING, comprising a base with a support roller, hinged on a base and a spring-loaded carriage with spring-loaded copy rollers, on which a welding torch with a mechanism for moving it is mounted which can be moved, characterized in that, in order to improve the quality of the welded weld due to ensuring reliable tracking of the butt when welding lap joints with a top sheet thickness of less than 3 mm and butt joints with a narrow cutting of edges, in the carriage Neno through opening mechanism for moving the welding torch configured as a plate attached to the welding torch, hollow member with an air supply and removal system with dyuzovoy grating facing the plate, and a central opening arranged coaxially to the through-hole in the carriage rigidly _with fixed on the base at a predetermined distance from the surface of the plate, the welding torch is passed through the holes in the hollow element and the carriage, and the copy rollers are mounted on the carriage on both sides and symmetrically relative to STI passing through its pivot axis, at least two on each side. ί 1227393