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Clamping method and fixture for deformed workpiece

A workpiece and tooling technology, which is applied in the field of mechanical processing, can solve problems such as unstable adsorption state of workpieces, high technical requirements for personnel, uneven force, etc., and achieve good bonding between workpieces and tooling, high efficiency, and simple clamping Effect

Inactive Publication Date: 2019-11-19
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of unstable workpiece adsorption state, uneven force, high technical requirements for personnel, low precision and long time-consuming existing in the existing clamping of deformed workpieces, the present invention provides a clamp and a supporting method of use, using the clamp and The tooling is connected, and the workpiece to be processed is closely attached to the tooling at the same time, which can achieve the purpose of low personnel requirements, one-time clamping in place, high precision and high efficiency

Method used

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  • Clamping method and fixture for deformed workpiece

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Experimental program
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Effect test

Embodiment 1

[0029] A clamping method for deformed workpieces of the present invention, the steps are:

[0030] Setting tooling 4 and fixture body 1 with a mating curved surface adapted to the shape required by the workpiece;

[0031] The deformed workpiece 3 is installed on the tooling 4

[0032] Air bag 2 is placed on deformed workpiece 3;

[0033] Cover the airbag 2 with the clamp body 1;

[0034] Connect and fix the tooling 4 with the fixture main body 1;

[0035] Inflate the airbag to make the deformed workpiece fit well with the tooling;

[0036] The tooling opens the vacuum adsorption device to absorb the deformed workpiece;

[0037] After the positioning sleeve, air bag and fixture are removed, the workpiece is processed.

[0038] The tooling 4 of the present invention is connected and positioned with the fixture main body 1 through a tapered positioning sleeve 6 . The air bag 2 is provided on the lower surface of the jig main body 1 .

Embodiment 2

[0040] A clamping fixture for a deformed workpiece according to the present invention comprises a fixture main body 1, an air bag 2 and a tooling 4; the tooling 4 and the fixture main body 1 have a curved surface adapted to the required shape of the workpiece; when clamping the workpiece, the deformed workpiece 3 is installed on the tooling Above, the airbag 2 is placed on the deformed workpiece 3, the fixture main body 1 covers the airbag 2, and the tooling 4 is connected and fixed with the fixture main body 3. Both sides of the tooling 4 and the fixture body 1 are provided with connecting holes, and the positioning tooling and the fixture body are connected through the positioning sleeve 6 arranged in the connecting hole 5 . A through hole is formed in the center of the positioning sleeve 6 for installing screws to fix the fixture main body 1 .

Embodiment 3

[0042] A clamping fixture for a deformed workpiece of the present invention, the deformed workpiece 3 is cleaned and placed on the surface of the tooling 4, the clamp 1 is covered on the workpiece, the positioning sleeve 6 is placed in the connecting plate 5, and screws are placed in the positioning sleeve 6 And lock it. During the locking process, the tapered surface of the positioning sleeve 6 automatically fits the fixture with the workpiece and the tooling. By inflating the air bag 2 installed on the surface of the fixture, the deformed workpiece 3 fits well with the tooling 4. Vacuum absorbs the deformed workpiece, and the workpiece can be processed after the positioning sleeve and the fixture are removed.

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Abstract

The invention discloses a clamping method and fixture for a deformed workpiece. According to the clamping method and fixture for the deformed workpiece, the two sides of a fixture main body are provided with connection holes to be used for connecting a tooling, positioning sleeves are put into the connection holes, and in the process of compressing the positioning sleeves, positioning sleeve conical surfaces align the fixture and the tooling automatically; the fixture main body is provided with an air bag, the workpiece and the tooling are made to be closely combined utilizing acting force generated by air bag air inflation on the deformed workpiece, and the whole workpiece is stressed evenly; and when clamping is performed, the workpiece is placed on the tooling, then the fixture is installed on, the fixture, the workpiece and the tooling are fitted together through the positioning sleeves and compressing holes in the two sides of the fixture, the workpiece is adsorbed and fixed afterthe air inflation is performed, and the clamping is finished. By means of the clamping method and fixture for the deformed workpiece, the clamping can be finished by one man operations, and the problem in the prior art of generation of uneven force bearing in workpiece compressing is solved, the workpiece is pressed evenly, the clamping time is short, the clamping state is stable, no machining risk exists, and the efficiency is high.

Description

technical field [0001] The invention belongs to the field of mechanical processing and is used for the clamping operation of deformed workpieces. Background technique [0002] In the field of mechanical processing, due to process requirements and aerodynamic characteristics, it is necessary to design some nonlinear free-form surfaces. Due to overall mass limitations and strength requirements, they are often designed as high-rib, thin-walled heterogeneous workpieces. Therefore, workpiece deformation is a common problem in the processing field. How to effectively control the deformation problem and perform efficient and high-precision machining is a problem that often needs to be faced. Due to the particularity of the material, a large force is required to overcome the deformation of the material in the aerospace field. At present, the ideal method is vacuum adsorption. This method needs to be carried out when the deformation of the workpiece and the tooling is less than 1mm t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/08
CPCB23Q3/08B23Q2703/04
Inventor 罗兴华朱志坤夏远猛张伟伟代良强
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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