Inner circle tensioning type clamp for aero-engine disc parts

Abstract

The utility model provides an inner circle tensioning type clamp of an aero-engine disc part, which solves the problem of deformation of the aero-engine disc part in the process of lathing a radial plate and ensures subsequent normal processing. The spherical clamp comprises a spherical clamp bottom plate, and the spherical clamp bottom plate is installed on a base. The bottom plate is suitable for the size of an inner circle of a part, an annular groove is formed in the outer diameter position of the upper surface of the bottom plate, a ball is placed in the annular groove, and the cover plate is installed on the ball in a pressing mode and locked with the bottom plate through a bolt, and is characterized in that the cover plate is of a wedge-shaped structure, and the wedge-shaped face of the cover plate, the groove bottom of the bottom plate and the inner circle face of the assembly define a limiting groove of the ball; and circumferential movement of the ball body is limited.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation engine disc class part processing frock, concretely is the inner circle of a kind of aviation engine disc class part tight type fixture. BACKGROUND

[0002] At present, the thickness of part of aviation engine disc class part web is only 2-5mm, and the radial span is large, the rigidity is weak, and the problem of vibration knife is easy to occur;In order to reduce the vibration knife of part in the process of processing, the rigidity of web is often improved by designing special fixture when processing part;Because the traditional inner circle tight type fixture, see Figure 1 , adopts the design of split type mandrel;During the process of tensioning, the tensioning force is transmitted to cover plate 3 by mandrel 2, and the inner circle of part 1 is transmitted to cover plate 3, mandrel 2 is circular truncated cone, and cover plate is petal-shaped, and the whole is cylindrical after splicing, when nut 4 locks screw 5, nut 4 extrudes mandrel 2, mandrel 2 goes down, the periphery of mandrel 2 extrudes cover plate 3, because the periphery of mandrel is tapered, and it is surface contact between cover plate 3, mandrel 2 generates oblique extrusion force to cover plate 3, according to the principle of force balance, part 1 also generates oblique pressure to cover plate 3, the influence of force and counterforce, cover plate 3 also generates oblique pressure to part, and the oblique pressure causes the linear contact between cover plate 3 and part 1, and the tensioning force received by the inner circle of part is easy to be inclined with the disc body, which causes the deformation of part web in the process of tensioning, and affects the subsequent normal processing. SUMMARY

[0003] In view of the fact that the inner circle of the existing aviation engine disc class part tight type fixture is deformed in the process of tensioning, and the subsequent normal processing is affected, the utility model provides an inner circle tight type fixture for aviation engine disc class part, solves the deformation problem of such parts in the process of web turning, and ensures the subsequent normal processing.

[0004] The technical scheme is as follows: a spherical clamp base plate is installed on a base, the base plate is suitable for the size of the inner circle of the part, a circular groove is formed on the outer diameter of the upper surface of the base plate, a ball is placed in the groove, a cover plate is pressed on the ball and locked with the base plate by bolts, characterized in that the cover plate is wedge-shaped, the wedge surface of the cover plate, the groove bottom of the base plate and the inner circle surface of the assembly form a limiting groove for the ball to limit the circumferential movement of the ball.

[0005] In the above structure of the utility model, the pressing force of the adjusting cover plate on the ball is adjusted to realize the tensioning of the ball on the inner circle of the assembly, the ball is used to press the inner circle of the part by the tensioning force, the deformation of the part is reduced due to the point contact between the ball and the part, the inner circle of the assembly is pressed by the ball by the tensioning force, thereby the rigidity of the assembly is enhanced, and the deformation problem of the part in the process of web turning is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a structural schematic view of an existing inner circle tensioning clamp;

[0007] Figure 2 is a structural schematic view of the utility model. DETAILED DESCRIPTION

[0008] See Figure 2 The utility model includes clamp base plate 7, clamp base plate 7 is installed in base

[0009] 8;The outer circle perimeter of clamp base plate 7 matches the inner circle size of spare part, and the outer edge of the upper surface of clamp base plate 7 is provided with circular groove 9, ball 10 is placed in circular groove 9, locking cover plate 11 is pressed in ball 10 and is locked with clamp base plate 7 through screw 12, cover plate 5 is wedge structure, the wedge surface of cover plate 11, the groove bottom of circular groove 9 of clamp base plate 7 and the inner circle surface of spare part 13 enclose the limiting groove of ball 10, and the circumferential movement of ball 10 is limited.In the center of clamp base plate 7, threaded hole is opened to lock cover plate 11, and the tensioning force of ball 10 to the inner circle of spare part 13 is controlled through locking cover plate 11;The wedge surface of cover plate 11 is convenient for effective contact ball 10 and limiting, after installation in place, screw 12 on cover plate 11 is tightened, thereby providing compression force, and then the tensioning force of ball 10 to the inner circle of spare part 13 is converted.Point contact is between ball 10 and spare part 13, and the angle deflection does not appear at the contact place of tensioning force and spare part 13, and the deformation does not appear in the process of tensioning of spare part 13 radial plate, and subsequent normal processing is guaranteed.

[0010] Figure 2 Middle 6 is fastening screw.

Claims

1. A tensioning fixture for the inner diameter of an aircraft engine disk component, comprising a spherical fixture base plate mounted on a base; the base plate is adapted to the inner diameter of the component, a circular groove is provided on the outer diameter of the upper surface of the base plate, a sphere is placed in the groove, a cover plate is press-fitted onto the sphere and locked to the base plate by bolts, and the following features are present: The cover plate is a wedge-shaped structure, and the wedge-shaped surface of the cover plate, the groove bottom of the bottom plate, and the inner circular surface of the component form a limiting groove for the sphere to limit the circumferential movement of the sphere.

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