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Machining method for radial high-precision small square holes of rotary part

A processing method and technology of a rotary body, applied in the field of mechanical processing, can solve problems such as complex electrode processing technology, irregular shape of square holes, poor dimensional consistency, etc., and achieve good consistency, low part pass rate, and high processing dimensional accuracy Effect

Active Publication Date: 2016-06-08
FLIGHT AUTOMATIC CONTROL RES INST
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  • Summary
  • 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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  • Machining method for radial high-precision small square holes of rotary part

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Experimental program
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Effect test

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: AgieCharmilles ROBFIL2030SI, Switzerland

[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 referenc...

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Abstract

The invention discloses a machining method for radial high-precision small square holes of a rotary 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 degree of the opposite holes is within 0.01 mm. According to the machining method for the radial high-precision small square holes of the rotary part, on the basis of machining the small square holes through traditional electric spark forming, the small square holes are machined roughly on an electric discharge machining machine tool through an EROWA fixture and a homemade electrode stand to reserve margins for finish machining; by using the characteristics and advantages of machining the workpiece through the EROWA fixture and slow speed wire cutting, slow speed wire cutting is added into the finish machining process for the small square holes, accordingly, the purpose that the radial coplanarity degree of the opposite holes is within 0.01 mm is achieved, and the small square holes are regular in shape. Compared with a traditional machining method, the machining method for the radial high-precision small square holes of the rotary part is high in efficiency and stable in quality, and the qualified rate reaches 99% or higher.

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 Applications(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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