A Machining Method of Radial High-precision Small Square Holes in Revolving Parts

A processing method and technology of revolving body, applied in the field of mechanical processing, can solve the problems of complex electrode processing technology, irregular square hole shape, poor dimensional consistency, etc., to achieve good consistency, low part qualification rate and high machining dimensional accuracy Effect

Active Publication Date: 2018-04-10
FLIGHT AUTOMATIC CONTROL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the processing route of the throttle hole of the valve sleeve part is to use the rough and finish machining electrodes to carry out the rough and finish machining of the small square hole on the EDM machine tool. Irregular shape, poor size consistency, low pass rate

Method used

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  • A Machining Method of Radial High-precision Small Square Holes in Revolving Parts

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Experimental program
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specific Embodiment approach

[0015] 1. The outer circle is from the size of the outer grinding to the The inner diameter is from wire cutting and honing processing size to

[0016] 2. Electrode processing requires the following steps:

[0017] Electrode material: copper tungsten alloy

[0018] 1) Electrode blank processing: wire cutting and flat grinding are used to process it into a strip shape of 40×5×2mm.

[0019] 2) Clamp the electrode blank in the electrode frame and tighten it with screws.

[0020] 3) Use the alignment function of the slow wire machine tool to determine the center on both sides of the electrode, which is the processing origin of the electrode. The parameters are set as follows:

[0021] Machine tool: Swiss AgieCharmilles ROBFIL 2030SI

[0022] Electrode wire: Galvanized copper wire

[0023] Wire speed: 6.8m / min

[0024] Wire tension: 0.48N

[0025] Spray pressure: 0

[0026] Pulse width: 3.0μs

[0027] Pulse interval: 6.6μs

[0028] Servo system average reference volt...

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Abstract

The invention discloses a machining method for a radially high-precision small square hole of a revolving body part. The machining range is 0.3-3.0 mm, the machining thickness is less than 1.5 mm, the root Rmax is 0.08, and the radial coplanarity of relative holes is 0.01 mm. within. This method is based on the traditional EDM processing of small square holes, using EROWA fixtures and self-made electrode holders, rough machining small square holes on EDM machine tools, leaving allowances for finishing; and using EROWA fixtures and slow walking The characteristics and advantages of wire cutting processing workpieces, adding slow wire cutting to the finishing process of small square holes, so as to achieve the purpose of radial coplanarity of relative holes within 0.01mm, and the shape of small square holes is regular. Compared with the traditional processing method, the small square hole processing method of the present invention has high efficiency, stable quality and a pass rate of over 99%.

Description

Technical field: [0001] The invention relates to the field of mechanical processing, in particular to a method for processing small square holes with high precision. The processing range is 0.3-3.0 mm, the processing thickness is less than 1.5 mm, the root Rmax is 0.08 mm, and the radial coplanarity of relative holes is within 0.01 mm. . Background technique: [0002] The accuracy of valve sleeve parts has a great influence on the performance of aviation products, and the valve sleeve throttling small square hole is one of the key characteristics that affect the precise control of hydraulic components. Due to the high precision requirements of the throttling square hole, it is difficult to complete it by traditional machining methods. Due to the advantages of simple equipment, high precision and high efficiency, EDM has been widely valued and applied. The throttling square hole of various valve sleeve parts in aviation products is in the range of 0.3-3.0mm, the radial copl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H9/14B23H7/22B23P23/04
Inventor 戚爱春韩卫刚余攀刘海涛
Owner FLIGHT AUTOMATIC CONTROL RES INST
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