Clamp of conical expansion-sleeve type steel bar cold drawing machine

Abstract

The invention relates to a clamp of a conical expansion-sleeve type steel bar cold drawing machine. The clamp comprises an end cover (1), an inner expansion sleeve (2) and an outer expansion sleeve (3), wherein the inner expansion sleeve (2) is arranged inside the outer expansion sleeve (3); the end cover (1) is arranged at the upper part of the outer expansion sleeve (3) and is connected with outer expansion sleeve (3) through a screw; the inner expansion sleeve (2) is in the shape of an outer cone; a circular hole is formed in the middle of the inner expansion sleeve (2) in a machining manner and deforms under the action of force; a groove is formed in the side wall of the inner expansion sleeve (2); the outer expansion sleeve (3) is in the shape of a cylinder as a whole and in the shape of an inner cone internally; the conical degree of the inner cone surface of the outer expansion sleeve (3) is the same as that of the outer cone surface of the inner expansion sleeve (2); a circular hole is formed on the minor diameter end of an inner cone hole of the outer expansion sleeve (3) in the machining manner; and the aperture of the circular hole is equal to the aperture of the inner expansion sleeve (2) and is matched with the diameter of a drawn steel bar. The mechanical clamping is realized by utilizing the inner and the outer expansion sleeves, so that the structure of the clamp is simple; and the clamp is automatically released by depending on the gravity of a steel bar after the steel bar is drawn, so that the manpower is saved.

Description

technical field [0001] The invention relates to a fixture, in particular to a tapered expansion sleeve type steel bar cold drawing machine fixture. Background technique [0002] Steel bar cold drawing is the main machine for industrial production of intermediate materials. Its main function is to provide factories with different diameters of bars, wires and various semi-finished bars and wires. The principle of its production process is simple, easy to operate, fast processing speed; small size, convenient installation, low degree of automation; low processing technology content, and low price. Due to the above characteristics, the cold drawing machine is used in many objects and has a wide market. [0003] At present, the cold drawing machines on the market usually do not have a good fixture, and there are difficulties in threading wires, poor clamping effect, too much waste, and difficulties in early processing, especially for thin steel bars. At present, there are mainl...

AI Technical Summary

Problems solved by technology

[0003] At present, the cold drawing machines on the market usually do not have a good fixture, and there are difficulties in threading wires, poor clamping effect, too much waste, and difficult early processing, especially for thin steel bars.

At present, there are mainly two types of fixtures for cold drawing machines: 1) manual loading and clamping and loosening; 2) automatic clamping and separation using a linkage mechanism, but these two methods are laborious to use

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