SU1389899A1 - Machine for sizing the ends of tubes - Google Patents

Abstract

The invention relates to the processing of metals by pressure, and more specifically to the design of machines for calibrating the ends of pipes with a roller tool. The purpose of the invention is improved calibration accuracy. A pipe end calibration machine consists of a pipe end calibration mechanism and a turner and pipe clamping mechanism. The pipe end calibration mechanism includes deforming rollers 3 mounted in separator 4 and supported on holder 5 fixed in traverse (T) 6. T 6 mounted on hydraulic cylinders 8 housings 7. Inner roller 14 is mounted eccentrically on shaft 15 that is offset from fixed axis 16 calibration mechanism. The pipe fixation mechanism consists of a damper 19 and a pusher 20 driven by a hydraulic cylinder 21. The pipe is set into deforming rollers 3 and clamped with jaws 23. The roller 14 distributes the end of the pipe to the specified dimensions, and the rollers 3 compress its end portion at a given length and give it the necessary conical profile. 3 il. A A (O ate

Description

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The invention relates to the processing of metals by pressure, and more specifically to the structures of machines for calibrating pipe ends with roller tools and can be used in the manufacture of thin-walled threaded oil assortment turbines (casing and tubing).

The purpose of the invention is to improve the accuracy of calibration.

FIG. 1 shows a machine for calibrating pipe ends, batched; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

The machine for calibrating pipe ends consists of two main mechanisms: mechanism 1 for calibrating 1THE pipe and mechanism 2 for rotating and clamping the pipe.

The pipe end calibration mechanism 2 includes deformed rollers 3 installed in the separator 4 with the possibility of turning, radial movement and resting on a conical holder 5 fixed in the cross member 6, which is axially displaced by hydraulic cylinders 7 installed in the housing 8. The ratio the taper of the rollers 3 to the taper of the holder 5 is 0.15-0.25. The separator 4 is mounted on a hollow shaft 9, which rotates freely on the rolling bearings 10. The yoke 6 is mounted on the housings of the hydraulic cylinders 7 and is attached to the rods of the 11 hydraulic cylinders by split half rings 12 held outside by the sleeve 13. The inner roller 14 is mounted eccentrically on the shaft 15, which is offset relative to the fixed axis 16 of the calibration mechanism. The shaft 15 is rotated around its own axis by a lever 17 from the hydraulic cylinder 18.

The fixing mechanism of the pipe end consists of a damper 19 located behind the rollers 3 and a pusher 20 driven by a hydraulic cylinder 21. The pusher 20 is located in the axis 16 of the calibration mechanism and passes through a groove made in the damper 19.

The clamping and rotating mechanism of the pipe consists of shpindles 22, in the grooves of which sponges 23 are mounted, supported on a tapered sleeve 24, moved axially by hydraulic cylinders 25. The rotational drive of the spindle consists of an electric motor 26 and a gearbox 27.

The device works as follows.

The pipe on the roller conveyor (not shown) is set through the spindle 22 into the roller gauge all the way into the damper 19. After the command to the hydraulic cylinder 21, the pusher 20, which sets the end of the pipe to the working position and the roller table is turned off. The pipe is clamped by the tubes 23, after which the pusher is retracted to the rearmost position, the drive of the pipe rotation 26 is turned on.

The inner roller 14 driven by the hydraulic cylinder 18 distributes the end of the pipe to a predetermined size and is retracted to its original position. A command is issued to move the yoke 6 with the yoke 5, which interacts with the idle rollers 3, which move radially to the axis of the pipe, compress its end portion at a predetermined length and provide it with the necessary conical profile. Due to the fact that the ratio of the taper of the rollers to the taper of the shroud is 0.15-0.25 when the axis of the mechanism for calibrating the rollers is deformed and forming the inner conical surface of the shroud intersect at one point, which

reduces slippage and improves surface quality. After the end of the working stroke, which is limited by the limit switches, the yoke 6 with the yoke 5 is kept in the extreme forward position for

pipe end calibration Then the yoke 6 is retracted to the rearmost position, the clamping rod 22 is turned off, the pipe clamping cams 23 are released, the roller table is turned on and the pipe is pulled out of the machine.

A machine for calibrating pipe ends in comparison with the known ones allows for improved calibration accuracy. The device also reduces the cost of producing pipes by reducing scrap.

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Claims (1)

Invention Formula A machine for calibrating pipe ends, comprising a pipe clamping and rotating mechanism, a pipe end fixation mechanism and a calibration mechanism in the form of an annular cage with an internal conical working surface located inside the cage of an annular separator with deforming conical rollers and power cylinders for moving the sleeve in the pipe feed direction, characterized in that, in order to improve the calibration accuracy, it is provided with an adjustable drive shaft, displaced relative to the axis of the calibration mechanism, a roll-on roller mounted eccentrically on the shaft, while the fixation mechanism of the pipe end is made in the form of a damper with a through groove mounted on the shaft and spring-loaded in the direction of movement; 0, a pusher damper located in a groove with a power cylinder for driving its axial movement, and the ratio of the taper of the deforming rollers to the inner working surface of the casing is 0.15-0.25. / 23 25