SU1286386A1 - Apparatus for assembling and welding metal structures - Google Patents

Abstract

The invention relates to welding and is intended for the assembly and welding of metal structures, mainly valve bodies from cy-. Lindric shell and two nozzles. The invention is an improvement in quality by ensuring that the welding head moves along the bisector of the angle between the edges being welded. The welding heads are moved along the copiers 15 and 16, thanks to their connection through the tips 18 with the copy grooves. The product is mounted on a rotator, with which two copiers, 90 relative to each other, are linked through a gear drive. 6 Il.

Description

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The invention relates to welding, in particular, to the construction of a device for assembling and welding metal structures, preferably valve bodies of a cylindrical shell and two nozzles.

The purpose of the invention is to improve the quality by ensuring that the welding head moves along the bisector of the angle between the weld edges.

Figure 1 shows a diagram of the product and the adjacent elements of the device; figure 2 - the initial position of the electrode welding head before welding; Fig. 3 shows a device for assembly and welding, side view; figure 4 is the same, top view; on fig.Z - section aa in figure 4; figure 6 - section bb in fig.Z.

The device comprises a base 1, a rotation drive 2, an L-shaped body 3, a tailstock 4, as well as elements of an assembly tool including retractable front 3 and back 6 flanges with pins 7 under the nozzles of the nozzles, a clamp 8 for orientation of the rear flange, an adaptation for assembly 9 and control patch 1P. The L-shaped body 3 is rigidly connected to the spindle 11 of the headstock 11 with a conical gear pair 12, forming a kinematic chain through which the rotation of the horizontal axis of the device is converted into reciprocating and oblique movement of each welding torch 13.

The rotation of the spindle 11 is transmitted by the shaft 14 to the main copier 13 having a groove and an additional copier 16 which is rotated relative to the main copier by 90. Copiers 13 and 16. Two actuators,.

Each actuator includes two cam rollers, which are placed in the grooves of copiers 13 and 16 and mounted on brackets 17 connected to rods 18 moving in two guides 19, between which are mounted with the possibility of permutation of the sleeve 20 with fingers 21, scenes 22, pivotally mounted at one end on the fingers 21. In the arm 22, an open groove is made, in the flats of which the driving axle 23 of the carriage 24 is inserted. In the central part of the link 22 there is a groove for the axle 23, which connects it to the plate 26, which fixed to the wall of the housing 27 on even Two screws 28 can be swapped horizontally.

The carriage 24 has a body 2, in the holes of which a drive 23 and a creeper 30 are inserted with supporting wheels 31 for moving the carriage 24 in guide grooves made in the side walls of the body 27.

On the drive axle 23 of the carriage 24, a bracket 32 with a sleeve 33 is rigidly seated, inside which the welding torch is moved and fixed in two extreme positions by the handle 34.

A second actuator for another is similarly arranged.

welding torch

for an additional copier 16, the elements of the assembly tool are designed to assemble two nozzles 35 and a shell 36, as well as to orient the two curved joints of the valve body exactly in accordance with the operation of the two copying mechanisms of the L-shaped case.

The process of assembling the product takes place in the following sequence.

The front flange 3 of the product is mounted on the front flange 3 along the pin 7 and fixed by the control patch 10 with the aid of a clamp 37. A shell is slid on the outer diameter of the fitting up to the stop against the inside diameter of the control patch 10. The rear flange 6 is fitted on the pin 7. pipe 33, which is inserted into the side opening of the shell 36 with the help of the tailstock 4.

Inside the shell are inserted the direct- ly for the assembly of parts of the valve. In order to obtain the required size between the inner ends of the nozzles 33 and the tailstock, all parts are pressed together, while the outer diameter of the shell must be free to abut against the inner diameter of the control pad 10, which controls the position of the curvilinear joint in accordance with the L-shaped body copy mechanisms and exposes the nozzles and shell axes mutually perpendicular. Before welding, release the clamp 37, remove the test

an overlay S, translate and fix two welding torches 13 to the working position with the handle FOR.

The device works as follows. .

Drive 2 axis rotation. nozzles are turned on simultaneously with the start of welding and its rotation is transmitted to the copier 15, the design of which transmits two complete oscillations for each pull of 18 spindles and moves in opposite directions in the guides 19, carries the sleeves 20. Each slide

22, mounted on pin 21, moving together with sleeve 20, simultaneously rotates around axis 25,

and the end inserted into the flats of the axis

23, moves the carriage 24 and rotates the axis 23. The bracket 32, on which the welding rod is mounted, is rigidly connected

with axis 23, moves progressively along with the carriage and makes oblique movements about axis 23

Thus, each welding torch 13, connected kinematically with its own and complementary mechanism, makes a reciprocating movement along the axis of rotation of the spindle and at the same time tilts in the direction of movement of the carriage. The rings of the electrodes of each welding torch coincide in level with the continuation of the axis of the shaft 23 of the carriage 24, therefore the inclinations made by them during the welding process are not reflected on the contour of the welding line, since the top of the inclination angle is located at the junction of the parts to be welded. The welding of two joints is carried out in one pass and ends automatically by means of a limit switch after welding a welded lock. The welding torches are set and fixed to their original positions with handle 34, after which the installation mechanisms are automatically returned to their original position by pressing the Return button on the device's remote control (not shown).

Release the assembly tool 9 parts such as pipes with a wedge and screw and remove them from the neck of the shell. The tailstock A is retracted to its original position, the valve body is removed from the pins 7 and put back into place. Further, the process of assembly for welding and automatic welding at the same time of two joints of the product is repeated on the next product.

The device can weld valve bodies consisting of nozzles and shells of different diameters.

By using a permutation of the sleeve 20, the axis 25 and the plate 26, the L-shaped housing can be configured to weld two curved circular seams in valve housings with variable diameters both at the branch pipes and at the shell.

The adjustment is made according to the control standard of the valve body with the corresponding diameters of the pipes and the shell. By moving the axis 25, it is possible to vary the magnitude of the oscillation amplitude and the inclination angle of the welding torch.

The combined horizontal movement of the sleeve 20 and the plate 26 changes the position of the welding torch along the axis of rotation of the spindle.

The rotational speed of the setting spindle 11 can be varied with interchangeable gears 38.

The assembly and welding device increases labor productivity by simultaneously automatically welding two joints, reduces subsequent laboriousness, as valve assembly is facilitated due to high-quality and precise assembly of valve body parts, also improves valve welding quality and improves production culture.

Claims (1)

Invention Formula A device for assembling and welding metal structures, mainly valve bodies of a cylindrical shell and two nozzles, containing a base-mounted mechanism for rotating the product from the front and back headstock {and welding head connected with a copier groove to move the welding head along a curved contour in the process product revisions, different from that, in order to improve quality by ensuring that the welding head moves along the bisector of the angle between the edges being welded, the device o mounted on the base 5 7 (AZ.Z L 1lf 17 fig.e