SU1380887A2 - Machine for resistance seam welding of sheets - Google Patents

Abstract

The invention relates to equipment for contact roller welding strips. The aim of the invention is to expand the technological capabilities of the machine, improving the quality of the welded joint, saving metal. For this, the rods 12 of the centering mechanisms of the strips are located on both sides of the longitudinal edges of the current-carrying welding lining 9. The distance between the edge of the lining 9 and the flat blades 11 should be in the range of 1–1.5 thicknesses of the roller electrode. By virtue of the crescent of the strips, as well as in inaccurate submission to the welding machine, the installation of rods in the immediate vicinity of the welding zone ensures a uniform overlap and assembly of sheets without ledges along the edges of the butt joint. 5 il. €

Description

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The invention relates to equipment for the contact roller welding of strips and sheets in technological processes that require continuous growth of the strip for its further processing.

The purpose of the invention is to improve the accuracy of alignment of the strip in the weld zone, which results in the absence of ledges in the weld zone, improving the quality of the welded joint and the percentage of cross seams in the assembly line, saving metal.

Figure 1 shows the machine, the side view of the cube; figure 2 is the same, front view; FIG. 3 is a diagram of the stop and centering of the strip; FIG. 4 is a diagram of clamping strips for welding, side view; FIG. 3 is a diagram of installation of the rods of the centering mechanism, plan view.

The machine is a gantry type construction placed on the base 1, on which are mounted in the upper part the guides 2 for moving the carriage 3, on which two roller electrodes 4, two circular knives 5 are mounted. On the lower part of the base 1 there are calipers 6 with clamps 7 strip ends with 8 keys.

Between calipers 6, a current lead welding pad is installed.

9, stops 10 for stopping the floors, flat knives 11, rods 12 of the centering mechanism of the incoming and outgoing 13

14 lanes located in windows 15.

The machine operates in the following sequence.

The end of the outgoing lane 14 is stopped. Stops 10 are retracted. The outgoing lane 14 is reversed, and the incoming lane 13 is fed to the stop.

10.Can alignment of the bands. 13

and 14 with the help of rods 12. After centering, the strip is fixed with 1 clamps.

The carriage 3 is set to a strip cutting position. Then the circular knives 5 are lowered. The drive of the carriage 3 is turned on. The two ends of the strips 13 and 14 are trimmed simultaneously. After the trimming is completed, the circular knives 5 are raised with the clamps 7 and move towards each other along with the clamped ends of the strips. Forms necessary overlapping bands. The carriage 3, at the end of the cutting operation, is in position to perform

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welding. The roller electrodes 4 are lowered and the carriage 3 turns on. The strips are welded in the opposite cutting direction.

Then they are released from clamping the ends of the strips 13 and 14. All mechanisms return to their original position, and the welded strip receives movement along the line of the unit.

The machine for contact roller welding of sheets is intended to ensure continuous technological processing of the strip in the metallurgical industry and its welding by crushing the edges.

Due to the crescent shape of the strips (along their length), as well as their inaccurate supply to the welding machine (the axis of the strip significantly deviates from the axis of the machine) a large distance of the rods of the centering devices from the welding zone significantly reduces the quality of centering of the ends of the strips and leads to the formation of with uneven overlap, as well as with the formation of ledges along the edge (width) of the butt joint. The same consequences are caused by trimming the ends of the centered strips before they are assembled for welding, if the trimming is performed at a large distance from the weld zone.

To eliminate these drawbacks, the rod 12 of the centering devices is placed directly at the welding conductor forming lining 9, in the windows 15 for removing cutting waste, and the trimming zone of the centered bands is placed immediately behind the rods 12 of the centering devices, i.e. as close as possible to the welding zone. In this case, the distance between the edges of the current-carrying lining and the flat blades is in the range of 1-1.5 crowds of the roller electrode.

Due to such placement of the rods 12 of the centering mechanism and the cutting mechanism, accurate alignment of the strips is achieved, regardless of the degree of accuracy of the feed of the ends of the strips to the welding machine and the degree of crescent of the strips. It also allows for trimming of strips with minimal scrap metal, which creates additional savings in the yield of the finished metal.

Claims (1)

Invention Formula Machine for contact welding of sheet sheets aut. St. No. 564121, characterized in that, in order to improve the quality of the welded connection and economy of metal, it is equipped with a centering mechanism for the strips, made with centering rods placed between the welding casting plate and the lower flat blades in the windows to remove waste after cutting. 1 J G2 7O 3 JO // // cfJue.lf f2 HT / T / T / A dzig.5