SU814268A3 - Device for treatment of ends - Google Patents

Description

one

The invention relates to the field of pressure treatment of parts such as pipes and can be used in the formation of castor bean at the end of the pipe before it is drawn.

A device for processing pipe ends is known, which comprises a feed mechanism, a pipe clamping mechanism and an annular matrix connected to the piston of the power cylinder tl mounted on the bed during the pipe feed.

However, in a pipe treated with such a device, it is necessary to cut off the crimped end, since it cannot be dragged on the mandrel. The result is a very large metal loss.

The purpose of the invention is to reduce metal losses in the device.

The goal is achieved by the fact that, in a device comprising a feed mechanism, a pipe clamping mechanism and an annular matrix connected to the piston of the power cylinder, the bar is hollow, and the device is equipped with a mandrel located coaxially with the annular matrix inside it and an additional driven piston

placed in the cavity of the main piston and rigidly connected with the mandrel. FIG. 1 presents a device, a general view from the side; in fig. 2 - the same, top view.

On the base 1, the clamping mechanism 2 of the pipe 3 is fixed, as well as the processing mechanism 4. The pipe 3 is inserted into the clamping mechanism 2 by means of an additional mechanism, made in the form of rollers 5, which are mounted to the swing levers 6 hinged on the brackets 7 of the base 1 and the Zan

 by means of a cable 8 with a drive 9. The height of the rollers 5 is installed by means of the actuator 9 so that the axis of the feed pipe [Yu] of the pipe coincides with the axis of the mechanism 2 of the clamp. Pipe 3

The 0 is pushed into the clamping mechanism until its end protrudes from this mechanism for a length, which allows the pipe to be machined to a certain size. 2 clamping mechanism

5 contains several clamping jaws 10 located inside the housing, ensuring a clamping of the pipe without deforming the latter. On the jaws, f. two bevels are completed, with which the clamping wedges 11 interact,

Each of the wedges 11 is connected to the piston 12 of the power cylinder 13. The machining mechanism 4 consists of a fixed base of the power cylinder 14, in which the hollow piston 15 is mounted. In the cavity of the hollow piston 15 there is an internal piston 16, the rod 17 of which carries the machining tool in the form of a mandrel. 18. On the hollow piston 15 through the sleeve 19 is fixed annular matrix 20.

The device works as follows.

The pipe 3 is fed through the rollers 5 to the clamping mechanism 2, where it is clamped by the cams 10 when pressure is applied to the piston cavities of the power cylinders 13. Then, through flexible hoses (not shown), pressure is applied to the piston cavities of the power cylinder 14 and the hollow piston 15, resulting in the die 20 and mandrel 18 move onto the tube 3 by machining the end of the tube. After crimping the end of the pipe, pressure is applied to the rod end of the cylinder 14 and the hollow piston 15 — the die 20 and the mandrel 18 move away from the pipe. Then pressure is applied to the rod end of the cylinder 13, the cams 10 unclench the pipe 3 and it is removed from the device.

If necessary, the mandrel 18 and the matrix 20 can handle the end of the pipe and alternately, for which you need to apply pressure only in the piston cavity of the cylinder 14 or 1 of the hollow piston 15.

Claims (1)

1. USSR author's certificate number 115851, cl. B 21 D 41/04, 28.08.57. 2 10 ° IS 3 17 W 15 fS If Rig. 2