SU1687380A1 - Pipe-cutting device - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in mechanical engineering for cutting pipes into dimensional workpieces. The purpose of the invention is to improve the quality of the resulting blanks. The pipe is fed to the stop. The cage with the cams 4. 5, 6, 7, 16 moves simultaneously with the guide collar all the way into the body 2. The cams, while continuing to move with the cage, are in contact with the mating surface of the outer knife and mandrel with their conical surfaces. At the same time, the annular sectors 8, 9, 19, 11 of the outer knife and the annular sectors 12, 13, 14, 15 of the mandrel are cut simultaneously from the outside and from the inside along the circumference of the pipe wall, bending the leaf springs. 2 Il.

Description

Type A

FIG. 2

(L

and 5

12

About 00 XI

with

00

about

The invention relates to the processing of metals by pressure and can be used in mechanical engineering for cutting pipes into dimensional workpieces.

The purpose of the invention is to improve the quality of the resulting blanks.

Figure 1 shows a device for cutting pipes, a longitudinal section; figure 2 is a view along arrow A in figure 1.

The device for cutting pipes comprises a base 1, a housing 2 mounted thereon, a holder 3 fixed in the housing, the inner surface of which is made conical and is cams 4, 5, 6, 7 for moving radially on knife knives made in the form of annular sectors 8, 9, 10, 11. In the cage installed mandrel, made in the form of four annular sectors 12, 13, 14, 15, covering the cam 16, made with an outer conical surface on the side of the annular sectors. The annular sectors of the outer knife and mandrel are associated with the guide 17 by means of leaf springs 18 and 19 and have the possibility of multidirectional radial movement. The guide 17 is installed in the longitudinal groove of the housing 2 with the possibility of axial reciprocating movement. It has axial bores 20 for the passage of the cam 16 and openings 21 for the passage of the rods of the stop 22. On the right side of the housing 2 is mounted a power cylinder 23 with a rod 24. The cam 16 has protrusions 25 designed to stop at the end of the guide 17 when moving it together with the clip 3 to its original position. A shoulder 26 is made on the right side of the guide, which limits its movement relative to the body 2 to the left. The spring guide is spring 27 to the base of the oooma 3.

The device for cutting pipes operates as follows.

The pipe 28 is fed into the cutting area of the device up to the stop of its end face at the ends of the bars of the stop 22. The force cylinder 23 is turned on. The rod 24 moves the sleeve 3 with the cams 4, 5, 6. 7 and the cam 16 along the body 2 guides to the left. At the same time, the yoke 3, through the spring 27, moves to the left a guide 17 with outer 8, 9, 10, 11 and inner 12,13, 14, 15 ring sectors up to the stop with an annular shoulder 26 into the body 2. Cams l. 5, 6, 7 and 16, continuing

together with the holder 3, move to the left, compressing the spring 27, with their conical surfaces they contact with the counter surface of the outer knife and mandrel. With

This knives are cut by cutting edges at the same time outside and inside along the circumference of the wall of the pipe 28, folding the leaf springs 18 and 19. After cutting the walls of the pipe 28, the power cylinder 23 switches to the reverse movement of the rod 24 moves the sleeve 3 with the cams 4, 5, 6, 7 and cam 16 to its original (right extreme) position. In this case, the bevels of the cams 4, 5, 6, 7 and 8 descend from the bevels of the outer 8, 9,10,11 and internal

12, 14, 15 ring sectors, as a result of which, under the action of the extension springs 18 and 19, they return to their original position (departure from the pipe 28). The projections 25 of the cam 16, acting on the end of the guide 17, move it together with the holder 3 to the initial (right extreme) position. The cut billet is held by the stop rods 22, after release under the force of gravity moves on

unloading. Then the cycle repeats.

Claims (1)

Claims An apparatus for cutting pipes, comprising a base, a housing mounted thereon, a yoke with a movable knife mounted therein with cutting edges on its inner surface and an abutment, characterized in that, in order to improve the quality of the received blanks, it is provided with a spring-loaded guide mounted in the yoke, a cam mounted in the mandrel and connected to the yoke, cylinder mounted on the housing and associated with the yoke, the rod, while the movable knife and mandrel are made in the form of ring sectors, installed with a gap between them and with the possibility of multidirectional radial movement, each ring sector is associated with the guide through the leaf spring, the yoke from the side of the movable knife is made with cutting edges on the outer surface and with the inner conical surface mounted with the ability to interact with the counter outer surface of the movable knife, and the cam is made with an outer conical surface mounted to interoperate with the counter inner surface of the mandrel 20 16 tt Phage /