Low-magnetism thread part manufacturing method

A technology for threads and parts, applied in the direction of manufacturing tools, metal processing equipment, tangent devices, etc., can solve the problems of difficult to meet process requirements, large transformation area of ​​non-magnetic steel structure, large residual magnetic field, etc., to save demagnetization time and save demagnetization. Cost, the effect of broad application prospects

Inactive Publication Date: 2012-01-11
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-magnetic stainless steel with extremely low magnetic permeability is usually used to make low magnetic parts, but the magnetic properties of stainless steel will be increased during cold working; parts obtained by traditional methods need to add demagnetization process to ensure the requirements of parts for residual magnetic field. Parts are also prone to re-infection after degaussing
When the processed part is a threaded part, due to the large amount of removal from the wool to the product, the deformation is large, and the transition area of ​​the non-magnetic steel structure is also very large, the part will obtain a large residual magnetic field after processing, which is difficult to meet the process requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Select 316L stainless steel material and use CNC inclined bed machine tool to process it into threaded parts. During the alignment process, the magnetic table frame is first adsorbed on the turret of the machine tool. After alignment, the turret is rotated 180° to keep the stainless steel material around 1m The magnetic field strength in the machine is ≤2GAUSS, start the machine tool for thread processing, the cutting depth is 0.2mm during rough turning, the speed is 150r / min, the feed rate is 0.2mm / r, and the cutting depth is controlled at 0.1mm during finishing turning. It is 120r / min, the feed rate is 0.2mm / r, the cutting depth is controlled to be 0.1mm during thread processing, the speed is 60r / min, the feed rate is 0.2mm / r, and the residual magnetic field of the threaded parts obtained is 15GAMMA.

[0015] All indicators of threaded parts meet the technical requirements.

Embodiment 2

[0017] Select 316L stainless steel material and use CNC inclined bed machine tool to process it into threaded parts. During the alignment process, the magnetic table frame is first adsorbed on the turret of the machine tool. After alignment, the turret is rotated 180° to keep the stainless steel material around 1m The magnetic field strength inside is ≤2GAUSS, start the machine tool for thread processing, the cutting depth is 0.15mm during rough turning, the speed is 120r / min, the feed rate is 0.15mm / r, the cutting depth is controlled at 0.05mm during finishing turning, the speed It is 100r / min, the feed rate is 0.15mm / r, the cutting depth is controlled to be 0.05mm during thread processing, the speed is 50r / min, the feed rate is 0.15mm / r, and the residual magnetic field of the obtained threaded parts is 10GAMMA.

Embodiment 3

[0019] Select 316L stainless steel material and use CNC inclined bed machine tool to process it into threaded parts. During the alignment process, the magnetic table frame is first adsorbed on the turret of the machine tool. After alignment, the turret is rotated 180° to keep the stainless steel material around 1m The magnetic field strength inside is ≤2GAUSS, start the machine tool for thread processing, the cutting depth is 0.2mm during rough turning, the speed is 120r / min, the feed rate is 0.2mm / r, the cutting depth is controlled at 0.05mm during finishing turning, the speed It is 120r / min, the feed rate is 0.15mm / r, the cutting depth is controlled to be 0.1mm during thread processing, the speed is 50r / min, the feed rate is 0.2mm / r, and the residual magnetic field of the threaded parts obtained is 12GAMMA.

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PUM

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Abstract

The invention relates to a low-magnetism thread part manufacturing method, belonging to the machining technical field; the low-magnetism thread part manufacturing method includes the following steps: 316L stainless steel material is selected and machined into thread parts by a CNC slant bed machine tool, the magnetic field strength within 1m around the stainless steel material is maintained less than or equal to 2GAUSS, the machine tool is started for thread machining, the depth of cut is controlled to be 0.1-0.2mm, the rotation speed is 20-150r / min and the amount of feed is 0.15-0.2mm / r during rough turning; depth of cut is controlled to be 0.05-0.1mm, the rotation speed is 20-60r / min, the amount of feed is 0.15-0.2mm / r during finish turning; the depth of cut is controlled to be 0.05-0.1mm, the rotation speed is 20-60 r / m and the amount of feed is 0.15-0.2 mm / r during thread machining, and the residual magnetic field for the thread part is less than or equal to 15 GAMMA. The low-magnetism thread part manufacturing method has high efficiency and low manufacturing cost. The manufacturing method can be directly applicable to manufacturing parts with higher residual magnetic field requirements for military and civil products, and has broad application prospect especially in the signal transmission field.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for manufacturing low magnetic thread parts. Background technique [0002] In many technical fields, low-magnetic parts have been used more and more, and some low-magnetic parts require a residual magnetic field of 40GAMMA (1GAMMA=10 -9 TELSA), this level of low magnetic parts not only strictly controls the processing parameters during the processing process, but also requires avoiding magnetic infection during the detection and transportation process. Non-magnetic stainless steel with extremely low magnetic permeability is usually used to make low magnetic parts, but the magnetic properties of stainless steel will be increased during cold working; parts obtained by traditional methods need to add demagnetization process to ensure the requirements of parts for residual magnetic field. It is also easy to re-infect the magnetism after the parts a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23G1/02
Inventor 刘鹏陈桂荣林大力李伟红何东敏叶红雨魏晓丽赵玉生文锋林岩
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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