SU1493356A1 - Apparatus for rotary drawing of hollow axisymmetric articles - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in machines for rotary drawing of hollow axisymmetric parts. The purpose of the invention is to improve the quality of parts and reliability by ensuring the equality of the peripheral speeds of the deforming roller and the workpiece at the initial moment of deformation. The device contains a rotating mandrel, at least one deforming roller and a workpiece assembly against the end of the mandrel, including a rotating center installed in the tailstock with a spring-loaded workpiece bushing mounted concentrically. The device also contains a spin-up unit for the deforming roller, which is made in the form of a clamp installed coaxially with the sleeve and concentrically rotating to the center from the tailstock of the cup with a longitudinal groove on the inner surface open from the side of the cup cavity. The glass is spring-loaded from the side of the clamping sleeve and mounted with the possibility of limited reciprocating movement along the axis of the rotating center. The length of the groove of the glass exceeds the idle of the deforming roller. Perpendicular to the axis of the rotating center, a pin is installed that interacts with its ends with the side and blind walls of the groove of the glass. An intermediate roller made of an elastic material is mounted on the same axis as the deforming roller and has a diameter smaller than the diameter of the deforming roller. Because the cup and roller are taken out of the immediate vicinity of the deformation zone, they are not exposed to the effect of the coolant, and therefore, they wear less. 1 il.

Description

four

WITH

00 00

SP

O5

by more than the idle of the deforming roller. Perpendicular to the axis of the rotating center of the center, a pin is installed, interacting with its ends with side and blind walls of the groove of the glass. Intermediate roller made of elastic material mounted on one axis

with a deforming roller and has a di-, smaller diameter deforming roller. Since the tumbler and roller are taken out of the immediate vicinity of the deformation zone, they are not exposed to the effect of the coolant and, therefore, wear less. 1 il.

The invention relates to the processing of metals by pressure and can be used in machines for rotary drawing of hollow axisymmetric parts.

The aim of the invention is to improve part quality and reliability by ensuring that the circumferential speeds of the workpiece and the deforming roller are equal at the initial moment of deformation.

The drawing shows a diagram of the proposed device.

The device contains at least one longitudinally moving deforming roller 1, on the axis of which an intermediate roller 2 is installed, made of an elastic material such as polyurethane, a mandrel 3 fixed in the spindle, on which the workpiece 4 is put, the tailstock 5 centered. A clamping sleeve 6 is installed on the center, made with grooves and provided with a spring-loaded cup 7, a groove slot and moving as far as it will go into the pin 8.

The device works as follows.

The hollow workpiece 4 is put on the mandrel 3 and pressed in the mandrel by the clamping sleeve 6. The deforming rollers 1 are brought to the working position at a predetermined gap, then they turn on the rotation of the mandrel 3 and the longitudinal movement of the rollers. The rotation through the center 5 and the pressure sleeve is transmitted to the glass 7. By interacting with the rotation of the roller roller 2 fixed on the roller holder axis, the glass mounted on the pressure sleeve makes the roller spin to ensure that the circumferential speeds of the roller and the workpiece are equal. . In this case, the intermediate roller 2 days of wear removal moves together with the cup up to the stop of the groove of the cup pitch 8, installed in the center 5, then the intermediate roller 2 moves along the cup surface until it slips off, after which the spring returns the cup to its original position. The magnitude of the groove in the glass overlaps the amount of idling of the deforming rollers from the moment they are reduced to their working position until they are in contact with the workpiece.

The proposed device is characterized by a simple constructive solution, increased reliability during operation due to continuous spinning of the roller until the start of rotational drawing and equal speed of the roller and workpiece, which significantly improves the quality of the parts, reduces wear and increases the durability of the deforming tool.

As a result of the fact that the roller and the cup are removed from the immediate vicinity of the deformation zone, i.e. No impact (Coolant, reduced wear and increased durability of these parts.

Claims (1)

Invention Formula A device for rotational stretching of hollow axisymmetric parts containing a rotating mandrel, at least one deforming roller and a billet pressing unit to the mandrel face, including a rotating center installed in the tailstock with a spring-loaded billet bushing concentric with it and unwinding the deforming roller prior to deforming With an intermediate roller of elastic material, characterized in that, with the aim of improving the quality of the part and reliability by ensuring equality of the district Tay the deforming roller and the workpiece at the initial moment of deforming, the spinning roller unwinding unit is made in the form of an axially mounted bushing and concentrically rotating center from the tailstock of the cup with a longitudinal groove on the inner surface open from the side of the cup cavity, spring-loaded from the bushing clamp side and mounted with the possibility of a limited returnable axial movement along the axis of the rotating center, a pin installed perpendicular to the axis of the latter with the possibility of its ends interacting with the side and deaf walls of the groove of the glass, while the intermediate roller is mounted on the same axis with the deforming roller and is made with a diameter smaller than the diameter of the deforming roller, and the length the groove of the glass exceeds the idling value of the deforming roller.