Positioning method for low-bending-moment clamping of small clamping surface of complex bracket part

A positioning method and part technology, applied in positioning devices, metal processing machinery parts, clamping and other directions, can solve the problems of easy vibration, affect the machining accuracy and consistency, reduce the bending moment of the clamping, improve the qualified efficiency and consistency, improving stability

Inactive Publication Date: 2020-03-13
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When subjected to cutting force, it is easy to generate vibration, which affects the machining accuracy and consistency

Method used

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  • Positioning method for low-bending-moment clamping of small clamping surface of complex bracket part
  • Positioning method for low-bending-moment clamping of small clamping surface of complex bracket part
  • Positioning method for low-bending-moment clamping of small clamping surface of complex bracket part

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Experimental program
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Effect test

Embodiment Construction

[0028] The present invention will now be further described in conjunction with the embodiments and drawings:

[0029] The invention adopts pin hole positioning and bolt reverse tension clamping to clamp small clamping surface bracket parts. The flatness of the tooling reference surface is required to be 0.01. The flatness requirement of the tooling mounting surface is 0.008; there are two sets of threaded holes 4×M6 on the tooling mounting surface, two positioning pin holes 2×Φ3, and the flatness requirement of the small clamping surface of the part process handle is 0.008. Correspondingly, there are two sets of threaded holes 4×M6 and two positioning pin holes 2×Φ3. After rough machining of bracket parts, the small clamping surface and tooling installation surface are processed to ensure the flatness requirements. Then drill the positioning pin holes. When clamping parts and fixtures, first install the positioning pins, and then match the parts with the fixtures through the p...

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Abstract

The invention relates to a positioning method for low-bending-moment clamping of a small clamping surface of a complex bracket part. Through the method, low-bending-moment clamping of complex bracketparts with small clamping surfaces is realized, stability of part clamping is improved, clamping stress is effectively reduced, positioning accuracy is improved, deformation of parts caused by clamping force is reduced, and processing consistency is ensured. Mainly technical characteristics of the method are as the follows: (1) both a clamping surface of a bracket and a plane of a tool have high flatness; (2) the bracket and the tool are positioned through pin holes; and (3) the bracket and the tool are clamped and fixed through a reverse pull bolt. The method provided by the invention can beused for positioning of low-bending-moment clamping of a small clamping surface of a complex bracket part, and is used for converting a part from vertical processing to horizontal process, so that precision of the part is ensured, and the qualification rate and consistency are improved.

Description

Technical field [0001] The invention belongs to the field of mechanical manufacturing and relates to a low-bending moment clamping positioning method for a small clamping surface of a complex bracket type part. Background technique [0002] For the bracket parts of the pitch axis system of optoelectronic products, due to the design requirements of weight reduction, rigidity and strength, this complex bracket part lacks a reliable and stable clamping and positioning plane, resulting in a finishing boring bottom outer circle clamp Difficulty in positioning. The available clamping plane is the small plane of the craft handle (about 27×70, two places, the span is 112). The conventional clamping method is clamping by the pressure plate, which has the problems of unstable lower pressure point, high height and large bending moment. When subjected to cutting force, vibration is prone to occur, which affects machining accuracy and consistency. [0003] In order to solve the above problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/06
CPCB23Q3/062
Inventor 李奔张文明谢新春兰起洪
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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