SU1660861A1 - Mandrel - Google Patents

Abstract

The invention relates to metal working and may be used for securing blanks. The purpose of the invention is to increase the reliability of the fastening by means of uniform distribution of the fastening forces. In the longitudinal slots of the housing 1 there are slides 2, in the grooves 3 of which pressure elements (balls) 4 are mounted, mounted in the slots of the separator 5 and using the latter associated with the piston 6 of the hydraulic cylinder 7. In the radial holes of the sliders 2 there are clamps 18 with springs 19. The balls are covered by elastic rings 23, and the surfaces of the sliders 2 are in contact with expanding elements (cams) 28. When securing the blanks, the piston 6 with the separator 5 moves to the left. They also move the balls, which press on the surface of the sliders 2, and shift them also to the left. As a result, the cams secure the blanks. Then, overcoming the radial force of the ring 23, which squeezes them, the balls roll under the conical section 25 of the ring 23 and, compressed by this ring, move the clamps 18 in the radial direction, locking the sliders 2. To remove the blanks from the mandrel, the separator 5 moves to the right, turning the balls into groove 3 of the slide 2, fix them and shift them to the right. The cams are displaced by spring rings 30 to the axis of the mandrel, freeing the blanks. 7 il.

Description

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Claims (1)

Claim A mandrel with expanding elements, sliders and a separator connected to the drive with pressure elements located in its holes, characterized in that, in order to increase the reliability of fixing, the mandrel is equipped with spring-loaded clamps with beveled cuts at the end and elastic rings with L-shaped protrusions, profile grooves, guide grooves and radial holes are made in the sliders, and grooves are made on the surface of the body, at the bottom of which * a notch is made, and the spring-loaded clamps are set Lena in the radial holes of the sliders and are designed to interact with the pressure elements on the one hand, and on the other hand with their beveled sections - with a notch, while the L-shaped protrusions of the elastic rings are installed in the grooves of the sliders, and the inner surfaces of the said rings are designed to interact with the pressure elements. Fig.Z 8-8 Compiled by A. Gribkov Editor V. Danko Tehred M. Morgenthal Corrector M. Kucheryavaya Order 2080 Circulation 551 Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.