SU531598A1 - Roll Bending Machine - Google Patents

Description

one

The invention relates to the field of metal forming, in particular, to devices for bending-rolling shells.

The known roll bending machine for shells, containing the lower roller, in which straightening of the barrel shape of the shell is feasible only with the use of shims placed on the inner surface of the shell 1.

However, in such a machine, in order to obtain the correct shape of the shell, it must be passed through the rolls again, which reduces labor productivity.

A known roll machine comprising a lower roller and a mechanism for eliminating the barrel-shaped part 2.

This mechanism is made in the form of hydraulic cylinders mounted under the cantilever roll parts. When the pressure of the fluid is turned on, the cantilever parts of the roll are bent up and the middle working part of the roll down. This device is complex, bulky and applicable to rolls with a small diameter.

In the proposed mask for simplifying its design, the mechanism for removing barrel-shapedness is made in the form of two split tapered bushings mounted on the lower roll with the possibility of adjusting axial displacement and facing one another with ends of a smaller diameter. The cut of the sleeves can be made along a helix.

Pa figs. I given a roll of the proposed machine with bushings, general view; in fig. 2 shows the layout of the rolls of the machine; in fig. 3 shows the node I in FIG. one.

The lower roll of the machine contains a shaft 1 with split tapered bushings 2 arranged on it, the distance between which depends on the width of the shell. The inner diameter of the sleeve is equal to the diameter of the shaft 1. The angle a is chosen depending on the thickness and brand

material in the range of 5-15 °. To better fit the two sections of the sleeve to the shaft, the section is made along a helical line. The bracket 3, designed to hold the sleeve on the shaft from the axial force, consists of two half-bars and is clamped on the shaft 1 with screws 4. When rolling, the ends of the shell roll over the tapered sleeves 2, as a result of which more pressure is applied to the shell material the center is concave and barrel-shaped - no corsetting is formed.

The proposed device is supposed to be implemented on a number of industry branches. The annual economic efficiency from the implementation of the invention per roller machine will be 12-15 thousand rubles.

Claims (2)

3 claims A roll bending machine for shells, comprising a lower cylindrical roller and a mechanism for eliminating the barrel shape of the part, characterized in that, in order to simplify the construction, the mechanism for eliminating barrel shape is made in the form of two split tapered bushings mounted on the lower roll with the possibility of adjusting axial movement and facing one another the ends of a smaller diameter. 2. A roll machine according to claim 1, characterized in that the slit of the sleeves is made along a helix. Sources of information taken into account in the examination: 1. Moshnin E. N. “Bending and straightening on rotary machines, M., 1967, art. 74-75. 2. Moshnin Ye. N. “Bending and straightening on rotary machines, M., 1967, pp. 116-119 — prototype.