Machining method for deep hole reducing inner cavity

A processing method and deep hole technology, which is applied in metal processing equipment, manufacturing tools, boring/drilling, etc., can solve the problems of low processing efficiency, inability to realize efficient and precise processing, and low processing pass rate, so as to improve processing quality, shorter processing times, avoidance of residual stresses and effects of high temperatures

Inactive Publication Date: 2014-08-27
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

For the processing of such products, the processing accuracy can be ensured by adopting multiple feeds, but the processing pass rate is low, the processing efficiency is low, and efficient and precise processing cannot be realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The processing of the central transmission rod of a certain type of engine, the material is 18Cr2Ni4WA, the length is 778±0.2mm, the internal large diameter is Φ19mm, the small diameter is Φ14mm, the length of the transition zone is 10mm, and it is located in the middle of the transmission rod. The specific processing steps are as follows:

[0043] 1. Preparation before processing

[0044] Use 3D drawing software for digital part configuration, and input the data into CNC machine tools;

[0045] Adjust the CNC machine tool. After adjustment, the spindle rotation accuracy of the CNC machine tool is 0.015mm;

[0046] The ultrasonic vibration cutting device is clamped on the CNC machine tool, and the boring tool is adjusted. The coaxiality between the center line of the boring bar of the tool and the rotation center of the spindle of the CNC machine tool is 0.015mm;

[0047] Adjust the vibration parameters during tool processing: the vibration frequency is 20KHz, the hori...

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PUM

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Abstract

The invention relates to a machining method for a deep hole reducing inner cavity. Variable cross-section machining is carried out by the adoption of small amplitude, small cutting-in and ultrasonic frequency vibration through turning and clamping, the surface roughness of a workpiece is reduced, and the dimensional accuracy of the workpiece is improved. According to the machining method, the step of repeated cutter feeding and retreating processing for machining the complex deep hole reducing inner cavity part is changed, the machining time is effectively shortened, and the machining quality of the complex deep hole reducing inner cavity part is improved.

Description

technical field [0001] The invention relates to a processing method, in particular to a processing method for a deep hole variable-diameter inner cavity. Background technique [0002] In the field of mechanical manufacturing, due to the complex deep hole variable diameter inner cavity (the aspect ratio is greater than 20, the diameter changes by more than 10%, and the length of the transition zone is less than 10% of the total length), the shape is complex, the processing rigidity is weak, and it is subject to clamping during processing. Force, cutting force, cutting heat, machine tool vibration, etc. are obviously affected, and the phenomenon of excessive tool clearance and chatter is easy to occur during processing, so it has always been one of the difficult problems in processing. For example, the central transmission rod of an aero-engine has a length of 778mm, an internal major diameter of Φ19mm, a minor diameter of Φ14mm, and a transition zone length of 10mm, and the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B37/00B23B41/02
CPCB23B37/00
Inventor 吴瑞彪孙旭东黄鹏跃张德远陈华伟隋翯
Owner HARBIN DONGAN ENGINE GRP
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