SU1310062A1 - Arrangement for moulding spiral-welded tubes - Google Patents

Abstract

The invention relates to the field of pipe production, in particular, to devices for forming spiral-seam pipes from metal tape. The aim of the invention is to enhance the functionality and simplify the design of the device. The possibility of simultaneous conversion of the device to the required pipe diameter and installation of the forming rollers at an angle corresponding to the angle of the forming of the spiral-seam pipe is provided by supplying supports with the forming rollers 2 with half nuts 3 and 4. Moreover, one of the half-nuts is cut and the other has a cylindrical bore. When the device is adjusted to the required size, the calipers are moved in the tangential direction by hydraulic cylinders 6. By rotating the screw gear 7 by means of a rail 11 mounted on the adjacent caliper, the molding rollers 2 are set to the position according to the molding angle. 8 Ш1. c (L E5 yu

Description

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The invention relates to pipe production and can be used to form pipes from a metal strip.

The aim of the invention is to simplify the design and expand the functionality.

1 shows a device for forming spiral pipes, top view; figure 2 - view A in figure 1 in fig.Z - view B in figure 1; in FIG. A, a device for retrofitting to different diameters; on fig.Z - node II in figure 4; figure 6 - section bb In fig.Z (rail shown conventionally); figure 7 - node I in figure 1; 8 shows a half-nut structure.

The device contains calipers I with forming rollers 2 provided with half-nuts 3 and 4 moving in the axial direction, one of the half-nuts provided with cutting, and the other has a cylindrical bore 3, hydraulic cylinders 6 moving the supports in the tangential direction, screw gear 7, a forming frame 8, the lever 9, the stop 10, the rail 11, the control rack 12, the thrust plane 13 of the semi-nut 4 and the interposer 14.

The device works as follows.

The device is installed at the required diameter according to the caliber (pipe section of the desired diameter) by supplying the working medium to the transom cavity of the hydraulic cylinder 6 before the rollers come into contact with the surface of the caliber. Then, the steel tape 13 from the setting machine is fed through the wiring to the caliper 1. With further advancement, the steel tape 13, pressed to the pipe axis, gets onto the surface of the rollers 2 of the subsequent caliper 1 and thus rolls into a spiral on the rollers 2 subsequent calipers 1 to exit from the device.

The device is adjusted to different pipe diameters (Fig. 4) by moving the supports 1 in the tangential direction (changing the distance a between the supports), supplying the working medium to the rod or backside cavity of the hydraulic cylinders 6. And at the same time, the forming angle oi is automatically set (changing the distance b) due to the rotation of the screw gear 7 by means of a rail 11, fastened22

for the next caliper, and turn the rollers 2 according to the molding angle oh with the help of levers 9 and stops 10. The device, when changing over from one pipe diameter to another, works as follows.

When supplying the working medium, for example, to increase the diameter of the pipe into the gate cavity of the cylinder 6 rod, the output from the cylinder, moves the subsequent support from the previous one. The rail 11 is also attached to the previous caliper. Screw gear 7, which is constantly in engagement with the rack

11, rotates, and the half-nut 3 is displaced along the cutting in the axial direction (in FIG. 6 it is indicated by an arrow), which is carried along by the rollers.

When changing over to a smaller

pipe meter working medium is fed into

five

The rod fionocTb of cylinder 6 and the stop 10, not allowing the lever 9 to move, causes it to rotate relative to itself and turn the roller according to the angle of the molding.

The screw gear 7, abutted against the stop plane 1 3 (Fig. 6), remains stationary in the axial direction. Semi-nuts 3 and 4, belonging to the same caliper, do not have the possibility of transverse relative to each other, since they are connected by a strap 16.

For the initial setup of the device, the forming angle ы, and the pitch t of the pipe helix are changed by the width of the steel strip 13. This is achieved by separating the rail 11 and the screw gear 7, as well as rotating it (changing the distance b). At the same time, the rollers 2 turn according to the forming angle.

When the working medium is supplied to the hydraulic cylinders 6, according to a given program, pipes of variable cross section, for example conical, are obtained.

The use of the invention allows for reconfiguration of the device to

0, different pipe diameters automatically change the setting angle of the forming rollers in accordance with the angle of forming of the helical pipe. In addition, the use of a hydraulic drive for moving calipers with forming rollers makes it possible to simplify this design as compared with the known aggregates for the manufacture of spherical-welded pipes.

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313

Claims (1)

Invention Formula A device for forming spiral-seam tubes containing calipers mounted on a frame with molding rollers and drives for moving calipers in the tangential direction, characterized in that, in order to enhance the functionality, calipers with molding rollers are equipped with gear racks and semi-nuts, one of which The cylinder has a cylindrical bore, the other is threadedly cut and is axially displaced relative to the half-nut with the bore, and the half-nut drive of each caliper is made in the form of a gear screw that engages a toothed rack and is mounted on an adjacent hydraulic cylinder caliper. with rake. 12 Figg 12 vrjo / trHfrrirt / figl /// ///// 7 5 -5 H t Editor N.Shvydka Compiled by E. Vetrova Tehred V. Kadar Proofreader A.T. 1820/7 Circulation 733 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, i