Reviving waste product of bearing with inner and outer bearing ring over size

A technology of bearing ring and outer diameter size, which is applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve problems such as inevitable economic losses, and achieve the effect of saving steel and obvious economic effects

Inactive Publication Date: 2006-08-23
马跃林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of these two treatment methods belong to the residual value

Method used

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  • Reviving waste product of bearing with inner and outer bearing ring over size
  • Reviving waste product of bearing with inner and outer bearing ring over size
  • Reviving waste product of bearing with inner and outer bearing ring over size

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Experimental program
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Embodiment Construction

[0045] Production application of the present invention can adopt two kinds of modes

[0046] 1. Manufacturers with an annual output of more than 1.2 million sets of bearings (inner diameter Φ>20mm) can set up and use them for their own use. The site is 60 square meters, the staff is 2-3 people, and the investment in equipment is 30,000 yuan.

[0047] 2. Areas where small bearing factories are relatively concentrated can set up specialized factories to serve bearing manufacturers and charge processing fees. The scale can be large or small, and the investment is within 100,000 yuan.

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Abstract

During bearing production, waste bearing rings with oversized outer and inner diameter in 2-8 % is produced, and the present invention provides the method of reviving these waste products. It is found that the additional tempering can alter the size of waste bearing rings, and controlling the tempering mode, temperature and time can increase or decrease the size of bearing rings. Controlling the temperature and time of tempering in hot oil can increase the outer diameter of bearing rings in 0.01-0.035 mm, and local HF tempering can decrease the inner diameter of bearing rings in0.005-0.015 mm. The principle of the present invention may be also used for other precise mechanical parts.

Description

technical field [0001] Bearings are the basic parts of precision machinery. my country is already a big bearing manufacturing country, and now produces more than 3.5 billion sets of bearings every year. The inner diameter and outer diameter tolerance zone of bearings are strictly regulated by international and Chinese national standards. Anything beyond the tolerance zone is a non-conforming product. The bearing factory treats unqualified rings with inner diameters larger than the standard and outer diameters smaller than the standard size, which can only be treated as waste products. According to the different equipment and technical level of each bearing manufacturer in our country, the scrap amount of this part is between 2% and 8% of the total production quantity. Background technique [0002] Disposal of waste rings Before the 1980s, the bearing factory was saved by chrome-plating the inner or outer diameter surface. After the 1980s, the country banned chrome platin...

Claims

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Application Information

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IPC IPC(8): C21D9/40C21D11/00
Inventor 马跃林廉万玲
Owner 马跃林
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