SU990363A1 - Tube welding mill for producing tubes in bundles - Google Patents

Description

one

The invention relates to pipe production, in particular, to the design of pipe-welded pipes for argon-arc welding of pipes.

A pipe-welding mill for the production of pipes in coils is known, which includes a belt preparation section, including a roll shop, an uncoiler, a loop table, a welding machine, heating devices, molding and calibration stands, a welding stand, a reduction, Q mill, a cutting device, a wiring system , differential arrows, specifying maschiny, winder 1.

The disadvantage of this mill is the need to install post-cutting systems after the cutting system, differential arrows of complex construction for dividing the flow of pipes into two winders that drive machines, since only such a set of equipment can ensure the continuity of the coiling of pipes into the coils, and this makes it difficult mill design.

Closest to the invention is a pipe-welding machine for the production of pipes in coils, containing an unwinder mounted for movement in a direction perpendicular to the mill axis, rolls shop, butt-welding machine, molding, welding and pulling stands, cutting device, coiling device bending rollers, and a receiving device with parallel receiving rollers, while the bending and receiving rollers are interconnected by a common drive 2b

The disadvantages of the known mill are the complexity of the design, the large size, and the inconvenience of maintenance, due to the fact that the cutting device installed in front of the bay convolution requires the supply of additional structures to the mill, namely, wiring, master rollers, a control mechanism of the bending roller required for guiding the front end of the subsequent pipe into the bending rollers to control the bending roller at the time the next end of the subsequent pipe approaches the bending area to form sufficient quantities There are gaps between the front end of the next and the rear end of the previous pipe, coiled into a coil, necessary to enable the finished coil to be removed without stopping the mill. The aim of the invention is to facilitate the maintenance of the pipe welding mill and simplify its construction. This goal is achieved by the fact that the receiving device is equipped with a platform installed with the possibility of tilting it relative to the axes of the bending rollers, the receiving rollers are placed on the platform and connected to the output shaft of the common drive through a universal joint, and the cutting device is installed behind the bending rollers of the coil-twisting device along the pipe coil . In addition, the device is made in the form of a fixed guide sleeve-knife and a movable foot mounted at the exit of the knife-sleeve. Moreover, the decoiler is made console, and the rolls shop is installed on its console. Such an embodiment of the pipe welding mill makes it possible to significantly simplify the design, provides the possibility of forming and removing coils without stopping the machine, eliminating the need to refill the front end of the pipe in the rollers of the bay convolution device, reduce the size and simplify the maintenance of the mill when filling the tape. FIG. 1 shows the proposed mill; in fig. 2 - front view of the mill; in fig. 3 is a kinematic diagram of a coil and cutting device; in fig. 4 - the same scheme of the receiving device. Pipe welding mill contains section 1 for preparation of rolls with a cantilever 2 and a magazine of 3 rolls made in the form of a roll with several parallel rolls, and for convenience of serving the rolls on the roll are assembled with the same direction of burrs on the edge of the tapes, butt-welding machine 4, forming stands with non-rolls forming rollers 5, welding stand 6, a tangent stand 7 with eight pairs of rollers (8 drive rollers and 8 pressure rollers), the first and fifth pairs having a vertical axis of rotation and a baying device 8 with bending rollers 9, made, for example, in the form of three roller bending machines, a receiving device 10 with parallel receiving rollers 11 placed on a platform 12 installed with the possibility of tilting it relative to the axes of the bending rollers 9 by means of a tilting mechanism made, for example, in the form of a pneumatic cylinder 13, hinged on the frame of the coil-convolution device 8 and the platform 12 through the tie-rods and the clamped coupling 14. The drive 15 of the bending 9 and the receiving rollers 11 is made of The receiving rollers 11 are connected to the output shaft 16 by means of a universal joint 17. The mill also includes a cutting device 18 consisting of a guide sleeve sleeve 19 fixed in the housing 20 and a movable knife 21 connected, for example, with pneumatic cylinder (not shown). The camp works as follows. From the magazine-reel mounted on the unwinder console, the end of the tape of one roll is unwound and transferred through a welding machine to the molding stands, where the tape is formed into a tubular billet. The pipe billet is fed to the welding stand where the complete reduction of the edges of the tape and their argon arc welding is performed. The tubular billet is produced by the rollers of the undercarriage. After the bottom stand, the welded tube is delivered to the bending rollers of the bay-convolution device. The end of the pipe, bent into a turn, is passed through the knife guide bushing and is transmitted to the receiving rollers of the receiving device. As the tube is welded, the turns of the tube accumulate on the pickup rollers. At the end of the tape in the previous roll, the welding process stops, the unwinder is moved by means of the movement mechanism in the direction perpendicular to the mill axis direction to the schag, multiple to the roll width, the front end of the next roll is fed to the butt welding machine, which after appropriate preparation is joined to the rear end of the previous one. Then the process of welding the tube stock begins again. After accumulating on the receiving rollers 11 a sufficient number of turns of the coil, the c. using a pneumatic cylinder (not shown) movable knife, and cuts a coil of tubular billet. In this case, since the movable knife is placed at the exit from the knife sleeve along the tubular turn, a new filling of the pipe end into the bending rollers of the coiler and the knife sleeve is not required. The cut coils of the formed coil are tilted together with the take-up rollers by tilting the platform, by means of the pneumatic cylinder 13 and discharged, for example, to the crane traverse. The resulting new coils of the coil fall onto the take-up rollers 11. In the process, the welding process of the tubular billet does not stop. The proposed construction of the mill greatly simplifies the design, provides the possibility of forming and removing the coils without stopping the mill, eliminates the need to refill the front end of the pipe into a coil pack, reduces the size and simplifies maintenance of the mill.

The mill is designed for the production of welded thin-walled pipes with the ratio of the outer diameter of the pipe being welded to the wall thickness and a welding speed of up to 15 m / min.

Claims (3)

1. A pipe-welding machine for the production of pipes in coils, containing an uncoiler installed with the possibility of movement in the direction perpendicular to the mill axis, rolls shop, cutting machine, molding, welding and pulling stands, cutting device, coiler wrapping device with bending rollers, and a receiving device with parallel-arranged receiving ryuls; the bending and receiving rollers are interconnected by means of a common drive. characterized in that, in order to facilitate the maintenance of the pipe-welding mill and simplify its design, the receiving device is equipped with a platform installed with the possibility of tilting it relative to the axes of the bending rollers, the receiving rollers are placed on the platform and connected to the output side of the universal drive through the universal joint, and the cutting the device is installed behind the bending rollers of the bay the turn of the pipe. 2. A mill according to claim 1, characterized in that the cutting device is made in the form of a fixed knife guide sleeve and a movable knife mounted at the exit of the knife sleeve a. 3. A mill according to claim 1, characterized in that the decoiler is made console, and the rolls magazine is installed on its console.