Electric spark machining method of outer circle surface array special-shaped grooves

A technology of outer circular surface and processing method, which is applied in the field of mechanical processing, can solve the problems of high processing difficulty, difficulty in accurately copying sharp or concave corners of the workpiece, poor processing consistency, etc., and achieve the effect of reducing repeated positioning errors

Inactive Publication Date: 2019-04-12
CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

For special-shaped slots with high drawing tolerance requirements, irregular slot shapes and high technical requirements for slot tip angles, general processing methods, such as milling and grinding of tiny tools, are not only difficult to process, but also complicated to locate. , It is easy to cause problems such as size out-of-tolerance and poor processing consistency
[0003] During EDM, it is difficult for the workpiece to accurately replicate sharp or concave corners on the tool

Method used

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  • Electric spark machining method of outer circle surface array special-shaped grooves
  • Electric spark machining method of outer circle surface array special-shaped grooves
  • Electric spark machining method of outer circle surface array special-shaped grooves

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Embodiment Construction

[0017] The specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] Taking the machining of the special-shaped groove of the aero-engine plunger as an example, it will be described in detail.

[0019] According to the requirements of the parts to be processed, the circumference length is firstly indexed. The plunger is a shaft sleeve part, and four special-shaped grooves are evenly distributed on the cylindrical surface. The indexing plate rotates 90° each time to process the next special-shaped groove;

[0020] Make special-shaped electrodes according to the size and shape requirements of special-shaped grooves. Considering that EDM cannot process sharp corners and concave corners, the shape of the special-shaped electrode is not completely consistent with the shape of the machined special-shaped groove.

[0021] EDM cannot process sharp corners during the machining process, so it can only infinite...

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Abstract

The invention relates to a machining method of outer circle surface array special-shaped grooves of an aero-engine plunger. According to the shapes of the special-shaped grooves, the shapes of electrode tip angles and the shapes of concave angles are determined according to the characteristics of electric spark process and the requirements of the discharging amount during machining of electrodes,the size is corrected, and it is guaranteed that the electric spark machining can obtain the special-shaped grooves which meet the drawing requirement; and meanwhile, machining of each special-shapedgroove is completed in sequence by utilizing a dividing plate, so that repeated positioning errors caused by repeated clamping are reduced.

Description

technical field [0001] The invention belongs to the field of machining, and in particular relates to an electric discharge machining method for arraying micro-shaped irregular grooves on an outer circular surface. Background technique [0002] For precision parts and couplings in the aerospace, ship and vehicle industries, the processing of outer circular grooves is particularly important. Usually, the special-shaped grooves are evenly distributed on the outer circle of the parts, which play a role in fastening the connection and controlling the flow of gas and fluid. For special-shaped slots with high drawing tolerance requirements, irregular slot shapes and high technical requirements for slot tip angles, general processing methods, such as milling and grinding of tiny tools, are not only difficult to process, but also complicated to locate. , It is easy to cause problems such as excessive size tolerance and poor processing consistency. [0003] During EDM, it is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/00B23H11/00
CPCB23H1/00B23H11/00
Inventor 池宪赵化东杨佳欣张伟杨海涛
Owner CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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