CS224029B1 - Clamping bush for moving round of tubes on tubes on pilger mills - Google Patents

Description

CZECHOSLOVAK SOCIALIST REPUBLIC (18) DESCRIPTION FOLLOWING COPYRIGHT CERTIFICATE 224029 (11) (Bl) (22) Enrolled 28 11 81 (21) (PV 8803-81) (51) Int. Cl.1 * 3 B 21 B 21/06 (40) Published 25 02 83 EQUIPMENT FOR INVENTIONS AND DISCOVERIES (45) Published 15 04 86

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Author vynilexu KOLLÁR LADISLAV, POVAŽSKA BYSTRICA (54) Clamping sleeve for rotating pipes in pilgrim rolling stations 1

The invention provides a clamping sleeve for rotating pipes on pilgrim rollers. Pipe rods on pilgrim rolling mills provide the appropriate feed-to-year feed between the reduction tools and rotate the tubes to one stroke of the rolling cage. A thrust with a compression spring, whose force is adjustable by the nuts, is located in the upper part of the tubing.

Three jaws are pushed through the radial lever lever mechanism by a leading radius and angle to the rear of the reduced tube. The torque is transmitted through the contact force by friction between the tube and the support flathead. This mechanism, when worn by the jaws and also in the case of spring fatigue, does not close the tube sufficiently so that the jaws slip along the tube.

Turning the tube to one stroke of the rolling cage is not constant, causing the geometry of the rolled tube not to be within the required tolerance. The pressure carriage is located in the superstructure of the tubular. This increase in tubing obscures the operator's view of the rear lunches from the control panel.

The above-mentioned drawbacks are eliminated by the clamping sleeve provided with an external thread for the u-2 tension in the tubular bed and the clamping hole according to the invention, which consists in that the pipe clamping hole is formed by an inlet tapered bore and a clamping tapered bore hole terminated by a seat . The advantages of the clamping sleeve lie in the simplicity of construction compared to the lever clamping mechanism, in uneconomical production, in the longevity of the surface of the inlet and clamp sleeves being cushioned and hardened. In the case of the need for the inlet and the clamping part of the self-locking clamping sleeve, it is possible to restore the parts by hard chrome. The pipe clamp with clamping sleeves is considerably lower, which improves the operator's view, from the control panel to the rear bezel and the rolling mill section. An exemplary embodiment of a clamping sleeve according to the invention is shown in cross-section of the accompanying drawing.

The clamping sleeve is formed by an external clamp 3 for clamping in a tubing by means of a key which is inserted into the holes 5 formed in the collar 4. Inside the clamping sleeve there is provided a hole for clamping the pipe which consists of an inlet conical shaft 1 and a clamping tapered conical 224029

Claims (1)

SUBJECT A clamping sleeve for rotating tubes on pilger mill stands equipped with an external thread for clamping the sleeve in a tube and a tube clamping hole provided sufficient friction force to transmit the torque required to rotate the tube at the extreme dead center of the rolling cage. BACKGROUND OF THE INVENTION characterized in that the tube clamping hole is formed by an inlet tapered bore (1) and a self-locking tapered bore (2) terminated by a seat (6).