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Method to make standard surface roughness by boring aluminum alloy

A surface roughness, aluminum alloy technology, used in turning equipment, manufacturing tools, toolholder accessories, etc., can solve problems such as unstable quality

Inactive Publication Date: 2016-09-07
HARBIN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the outer cylinder of a key part of a helicopter’s nose landing gear, the part is a forging. Its inner hole size requires φ80H7 and φ88H7 to be 246mm deep and the surface roughness is Ra0.4. This is a difficult problem that is difficult to achieve by mechanical boring. The fitter polishes it by hand, and the quality is not stable

Method used

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  • Method to make standard surface roughness by boring aluminum alloy
  • Method to make standard surface roughness by boring aluminum alloy
  • Method to make standard surface roughness by boring aluminum alloy

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Experimental program
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Embodiment

[0045] Use concrete processing method of the present invention as follows:

[0046] 1. Wipe the parts clean and check whether the positioning reference of the part is flat; check that there is no gap between the tooling and the positioning reference of the part; prepare rough and fine boring tools for processing, and check the integrity of the blade.

[0047] 2. Lay the part flat to prevent deformation of the part, that is, install a dial indicator on the symmetrical position on both sides of the top of the hole to detect the slight deformation of the part caused by the clamping force.

[0048] 3. When clamping parts, adopt 4 pressure plates to press symmetrically. Since the parts are high, both the top and the bottom need to be focused during processing, otherwise the parts are easy to vibrate. Using the characteristics of the parts, the original two holes of the parts are connected to a standard rod , as the pressed point for compaction.

[0049] 4. Determine the origin of ...

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Abstract

The invention belongs to the field of machining, and relates to a method to make a standard surface roughness by boring an aluminum alloy. The method includes that (1) the selected machine tool is a machining center machine tool, which has a high-precision linear motion guide rail, a precise spindle bearing, a ball screw and a highly efficient servo drive motor; (2) a mallet is used for alignment when a machining member is clamped and positioned; (3) a through hole boring cutter is an ordinary boring cutter with a cutting edge angle of 45-75 degrees, and the selected blade is a blade made of dedicated boring aluminum material; (6) a process scheme includes the procedures of rough boring, semi-fine boring and fine boring; and (8) rough and finish machining are conducted, with the allowance of <phi>0.1mm prior to finish machining, machining <phi> 80H7, rotating speed S500, and feed F16; and the machining <phi> 88F7, rotating speed S500, and feed F16.

Description

technical field [0001] The invention belongs to the field of mechanical processing and relates to a method for developing and boring aluminum alloy to make the surface roughness reach the standard. Background technique [0002] In the outer cylinder of a key part of a helicopter’s nose landing gear, the part is a forging. Its inner hole size requires φ80H7 and φ88H7 to be 246mm deep and the surface roughness is Ra0.4. This is a difficult problem that is difficult to achieve by mechanical boring. The fitter polishes it by hand, and the quality is inconsistent. [0003] Generally, boring can make the surface roughness of the parts reach about Ra0.8, but it is very difficult to achieve Ra0.4 and make it stable. It is necessary to conduct a comprehensive analysis of the actual situation, and to analyze the factors that cause the out-of-tolerance Make corrections in an appropriate way. Through the experiment, the main problems are as follows: the precision of the machine tool i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B35/00B23B27/00
CPCB23B35/00B23B27/00B23B2220/24B23B2220/44
Inventor 秦世俊宋广权耿连昌闫明贺段秀军单连波刘福久郑志伟尤玉飞姜绪才
Owner HARBIN
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