Fixture for fixing U-shaped annular part

Abstract

The invention discloses a fixture for fixing a U-shaped annular part. The fixture comprises a circular base, wherein a plurality of T-shaped grooves which are distributed in the radial direction are formed on the base; each T-shaped groove is provided with two fixable T-shaped sliding blocks; the T-shaped sliding blocks are provided with positioning blocks; the positioning blocks on two T-shaped sliding blocks in the same T-shaped groove are opposite to each other; opposite surfaces of two positioning blocks are provided with a fine turning block respectively; and the fine turning blocks are connected with the positioning blocks through fine turning screws. Due to the adoption of the fixture, the U-shaped annular part is fixed by tightly clamping the side wall of the part through two opposite fine turning blocks on each T-shaped groove, so that the problems of flattening and deformation can be solved, and the machining quality of the U-shaped annular part can be effectively ensured. Simultaneously, the fixture can position the T-shaped sliding blocks in the T-shaped grooves according to the diameter and the wall thickness of the U-shaped annular part, is high in universality and can be used for various U-shaped annular parts with different diameters and thicknesses.

Description

technical field [0001] The invention relates to a fixing fixture, in particular to a fixing fixture used for processing U-shaped ring parts on a steam turbine. Background technique [0002] The structure of U-shaped ring parts used in steam turbines is as follows: figure 1 , 2 As shown, it includes an annular body 1 , and a narrow and deep U-shaped groove 13 is provided on the inner peripheral surface 12 of the annular body 1 . The structural feature of the U-shaped annular part is that the diameter of the inner peripheral surface 12 is slightly different from the diameter of the outer circular surface 11, and the side wall of the annular body 1 is relatively thin. When the U-shaped annular part is processed, its inner and outer circular surfaces are usually processed first, and after the inner and outer peripheral surfaces are processed, it is used as a reference plane to position and process the dimensions of the upper and lower end surfaces. The workpiece needs to be f...

AI Technical Summary

Problems solved by technology

The workpiece needs to be fixed during the processing of the upper and lower end faces. At present, the commonly used method is to use a pressure plate to fix it. Since the side wall of the annular body 1 is thin, it is particularly easy to cause deformation of the annular body 1 during the clamping process of the pressure plate. And because there is a circle of U-shaped grooves on the inner peripheral surface of the annular body 1, there may be vibrations during the processing, which will adversely affect the processing quality of the U-shaped annular parts.

Images