RU1803437C - Ring part thermal calibration device - Google Patents

Abstract

The invention relates to a technology for manufacturing annular parts and can be used in the heat treatment of parts such as shells. The device comprises a cylindrical mandrel made of a material with a linear expansion coefficient greater than that of the part material, a split ring and a sectional forming shell. The mandrel, which can be moved along the axis of the part by means of a settling rod, is connected to the forming shell by means of links and hinges mounted on the protrusions of the mandrel and the shell, the link being made in the form of a plate with grooves for the protrusions of the mandrel and the shell. 3 ill.

Description

ate

WITH

The invention relates to a technology for manufacturing annular parts and can be used in the heat treatment of parts such as shells.

The purpose of the invention is to increase labor productivity by expanding technological capabilities.

In FIG. 1 shows a device, a general view, the moment of thermoforming and changing the shape of a part; in FIG. 2 is a section along AA in FIG. 1; in FIG. 3 - the moment of the beginning of the change in the shape of the part,

The device comprises a mandrel 1 of material with a linear expansion coefficient greater than the linear expansion coefficient of the material of the part, and a forming element 2, which is made sectional, while sections 3 of the forming element are pivotally connected to the mandrel 1 through link 4. The device is also provided a split ring 5 and a clamping rod 6 located coaxially with the forming element 2 and the mandrel 1. The device is mounted on the plate 7.

The device operates as follows.

Initially, sections 3 of the forming element 2 are shifted to the center of the part by a size that allows the installation of the workpiece. When this link 4 is rotated by an angle a. relative to the horizontal. After the workpiece is installed, a detachable ring 5 is installed coaxially with the forming element 2. The clamping rod 6, mounted coaxially in the mandrel 1, provides preliminary shaping of the workpiece within elastic deformations. When heated in a furnace, relaxation occurs e.g. 00

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genius, i.e. the transition of elastic strains to plastic, and the stiffness of the part is reduced.

Under the influence of gravity of the pressing rod 6, the mandrel 1 moves down to the stop in the plate 7. In this case, the link 4 rotates and moves apart radially from the center of section 3 of the forming element 2 (angle a 0). Axial to radial forces are converted.

In addition, when heated due to the large coefficient of linear expansion, the mandrel 1 expands, the link 4 is extended, the sections 3 are moved and, combined with the movements of the sections 3 from the pressure rod, the part is expanded, its geometry is changed, giving it the required size and profile needed.

The settling ability of the forming element is determined by the material and diameter of the mandrel, the material and length of the links and the angle of inclination of the links relative to the horizontal.

By varying the material and diameter of the mandrel, the material and length of the links and their angle of inclination, any desired amount of radial deformation can be achieved.

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Compared with the prototype, the articulation of sections of the forming element with the mandrel through the link reduces friction losses in the joints and allows you to combine the operation of thermoforming and changing the geometry of the part, which extends the technological capabilities of the device and increases labor productivity.

Claims (1)

SUMMARY OF THE INVENTION A device for thermally calibrating ring parts containing a forming element, a mandrel made of a material with a linear expansion coefficient greater than the linear expansion coefficient of the part, and a pressure rod coaxially mounted in the mandrel, characterized in that, in order to increase productivity and expand technological capabilities by additional molding, it is equipped with a split ring located coaxially to the forming element, which is made section while the sections of the forming element are pivotally connected to the mandrel through the link. Fi.g