CN116038379A

CN116038379A - Double anti-rotation spring jacket processing method

Info

Publication number: CN116038379A
Application number: CN202310062327.0A
Authority: CN
Inventors: 岑晓峰; 李鸿
Original assignee: Guizhou Hangrui Aviation Precision Parts Manufacturing Co ltd
Current assignee: Guizhou Hangrui Aviation Precision Parts Manufacturing Co ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-05-02

Abstract

A double anti-rotation spring jacket processing method comprises the following steps: drilling a middle shaft hole by clamping the centers of the round bars according to the sizes of cylindrical surfaces of different specifications; milling an elliptical step hole on the left end face of the drilled middle shaft hole according to the shape of the head of the part; machining an inner chamfer at the edge of the shaft hole in the bottom of the elliptical step hole according to the maximum cone angle of the part head; processing a circular neck groove on the left side of the outer surface of the round bar material, processing six planes on the right side of the outer surface of the round bar material to form a hexagonal chuck, and forming a limiting step between the circular neck groove and the six planes; the right end surfaces of the six planes are processed into outer chamfers 7, equal-division grooves are formed in the intersection of each plane, and crack-stopping holes are drilled in the left ends of the equal-division grooves. Through test verification, the invention solves the problems of no deformation, slip, damage, rotation and the like of the clamping during the processing of the external round thin-wall part, effectively improves the processing efficiency and achieves the expected purpose.

Description

Double anti-rotation spring jacket processing method

Technical Field

The invention relates to a double anti-rotation spring jacket processing method, and belongs to the technical field of machining.

Background

The external thin-wall part is round, the clamping difficulty is large, the traditional chuck is adopted for clamping during processing, deformation and slipping are easy, even surface damage is caused, and the processing quality and efficiency of the part are directly affected. For this purpose, a double anti-rotation spring collet is specially designed. The clamping problem of this type of part has been solved, processingquality and efficiency have been promoted.

Disclosure of Invention

The invention aims to solve the technical problem of low machining efficiency caused by the conditions of deformation, slipping, damage, rotation and the like of the external round thin-wall part in the machining process.

In order to solve the technical problems, the invention adopts the following technical scheme:

a double anti-rotation spring jacket processing method comprises the following steps:

step one: drilling a middle shaft hole by clamping the centers of the round bars according to the sizes of cylindrical surfaces of different specifications;

step two: milling an elliptical step hole on the left end face of the drilled middle shaft hole according to the shape of the head of the part;

step three: machining an inner chamfer at the edge of the shaft hole in the bottom of the elliptical step hole according to the maximum cone angle of the part head;

step four: processing a circular neck groove on the left side of the outer surface of the round bar material, processing six planes on the right side of the outer surface of the round bar material to form a hexagonal chuck, and forming a limiting step between the circular neck groove and the six planes;

step five: the right end surfaces of the six planes are processed into outer chamfers 7, equal-division grooves are formed in the intersection of each plane, and crack-stopping holes are drilled in the left ends of the equal-division grooves.

The beneficial effects of adopting above-mentioned technical scheme are:

through test verification, the invention solves the problems of no deformation, slip, damage, rotation and the like of the clamping during the processing of the external round thin-wall part, effectively improves the processing efficiency and achieves the expected purpose.

Drawings

FIG. 1 is a schematic view of a double anti-rotation spring collet according to the present invention.

In the figure: 1-middle shaft hole, 2-elliptic step hole, 3-inner chamfer, 4-circular neck groove, 5-plane, 6-limit step, 7-outer chamfer, 8-equal division groove and 9-crack stop hole.

Fig. 2 is a schematic view of the installation structure of the present invention.

Fig. 3 is a right side view of fig. 2.

Fig. 4 is a sectional view taken along the B-B plane in fig. 2.

Fig. 5 is a sectional view of the D-D plane of fig. 2.

In the figure: 10-jacket, 11-chuck, 12-part.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

step one: the center of the round bar material is drilled with a middle shaft hole 1 according to the sizes of clamping cylindrical surfaces of different specifications, so that the parts can be smoothly inserted, positioned and clamped;

step two: milling an elliptical step hole 2 on the left end face of the drilled middle shaft hole 1 according to the shape of the head of the part, wherein the elliptical step hole 2 ensures that the head of the part can be completely sunk;

step three: machining an inner chamfer 3 on the edge of the shaft hole 1 at the bottom of the elliptical step hole 2 according to the maximum cone angle of the part head;

step four: a circular neck groove 4 is processed on the left side of the outer surface of the round bar material, six planes 5 are processed on the right side of the outer surface of the round bar material to form a hexagonal chuck, and a limit step 6 is formed between the circular neck groove 4 and the six planes 5;

step five: the right end surfaces of the six planes 5 are processed into outer chamfers 7, the intersection of each plane 5 is provided with an equal division groove 8, and the left end of the equal division groove 8 is drilled with a crack stop hole 9.

The hexagonal chuck can prevent the jacket from rotating relative to the chuck.

The equally dividing grooves 8 can ensure that the clamped part can be uniformly stressed in six directions.

The crack-stopping holes 9 can prevent the fracture caused by concentration of stress at the bottom of the equal-division groove, and the service life is prolonged.

The annular stiffening groove 4 can reduce the rigidity of the part and is beneficial to clamping parts.

The limiting step 6 is the clamping depth of the fixed jacket on the clamping head.

The outer chamfer 7 is used for clamping and guiding.

The elliptical step hole 2 limits the rotation of the part head relative to the jacket.

The inner chamfer 3 can enable the part to be fully attached to the jacket, and the head of the part is prevented from being damaged by the jacket.

The center shaft hole 1 is a clamping hole of the part, and is fully attached to the rod part of the part during clamping, so that the part is protected from deformation.

The invention adopts the installation mode and the working principle:

selecting a matched spring jacket and a hexagonal chuck according to the product specification, and placing a blank of the part into the jacket when in use, so that the conical surface of the head of the part is fully contacted with the 76-degree chamfer; putting the jacket into a hexagonal chuck to ensure that the limit table is attached to the end part of the chuck; and clamping the hexagonal chuck, and finishing the installation. The mounted state is shown in fig. 2.

Under the clamping force of the hexagonal chuck, six sides of the clamping sleeve 10 are uniformly stressed, so that the relative rotation between the clamping sleeve 10 and the clamping sleeve 11 is effectively prevented; the rod part of the part 12 is uniformly stressed in six directions under the clamping action of the jacket 10, so that local deformation can not occur; the oval head of the part 12 is sunk into the oval stepped hole 2, and even if the clamping is loose, the part 12 and the jacket 10 can be ensured not to rotate relatively. The double anti-rotation effect is achieved.

In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "right", "left", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention.

Claims

1. A double anti-rotation spring jacket processing method is characterized in that: it comprises the following steps:

step one: the center of the round bar material is drilled with a middle shaft hole (1) according to the sizes of clamping cylindrical surfaces of different specifications;

step two: milling an elliptical step hole (2) on the left end surface of the drilled middle shaft hole (1) according to the shape of the head of the part;

step three: machining an inner chamfer (3) on the edge of the middle shaft hole (1) at the bottom of the elliptical step hole (2) according to the maximum cone angle of the part head;

step four: a circular neck groove (4) is processed on the left side of the outer surface of the round bar material, six planes (5) are processed on the right side of the outer surface of the round bar material to form a hexagonal chuck, and a limit step (6) is formed between the circular neck groove (4) and the six planes (5);

step five: the right end faces of the six planes (5) are processed into outer chamfers (7), the intersection of each plane (5) is provided with an equal division groove (8), and the left end of each equal division groove (8) is drilled with a crack-stopping hole (9).