Method for manufacturing steel ball for fan bearing

A technology of bearing steel and manufacturing method, applied in the field of steel ball manufacturing, can solve the problems of low bearing capacity, short service life, small bearing load, etc., and achieve the effect of tight internal organization

Inactive Publication Date: 2012-10-24
上海钢球厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a manufacturing method of steel balls for fan bearings, to solve the problem that the steel balls for fan bearings produced by the current manufacturing method of steel balls for fan bearings have low impact bearing capacity, small load carrying capacity and long service life. short question

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  • Method for manufacturing steel ball for fan bearing
  • Method for manufacturing steel ball for fan bearing
  • Method for manufacturing steel ball for fan bearing

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Experimental program
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Effect test

Embodiment 1

[0019] Steel balls for fan bearings, The manufacturing method includes a grinding step, wherein a hot heading process and a continuous annealing process are arranged before the grinding step.

[0020] In this embodiment, the hot heading process includes blanking-finishing-heating-forming-cooling. The hot upsetting process adopts upsetting extrusion, and its metallographic structure is fine and compact, and the metal wire flow is in two arc shapes (arch type), which is resistant to pressure and impact.

[0021] The rolling system adopts rolling extrusion. Although the metallographic structure is affected by external forces, the change is small, the wire flow is irregular, and there are many divergence points. The pressure resistance and impact resistance are worse than thermal upsetting.

[0022] The heating temperature of the hot heading process is 800°C, and the heating time is 0.5 hours. The cooling of the hot heading process adopts direct air cooling.

[0023] In this e...

Embodiment 2

[0028] In this embodiment, the steel balls for fan bearings, The manufacturing method includes a grinding step, wherein a hot heading process and a continuous annealing process are arranged before the grinding step. The heating temperature of the hot heading process is 850°C, and the heating time is 1 hour. The preheating temperature of the continuous annealing process is 450° C., and the preheating time is 1 hour. The heating temperature of the continuous annealing process is 700° C., and the heating time is 1 hour. The constant temperature of the continuous annealing process is 780° C., and the constant temperature time is 4 hours. The air cooling temperature for the continuous annealing process is 600°C.

[0029] In the grinding step, a lapping plate is used as the grinding plate, and chromium trioxide is used as the abrasive for grinding. The water solvent for the lapping plate is a mixed water agent with the characteristics and functions of lubricating, cooling, clean...

Embodiment 3

[0033] In this embodiment, the steel balls for fan bearings, The manufacturing method includes a grinding step, wherein a hot heading process and a continuous annealing process are arranged before the grinding step. The heating temperature of the hot heading process is 825°C, and the heating time is 0.75 hours. The preheating temperature of the continuous annealing process is 450° C., and the preheating time is 1 hour. The heating temperature of the continuous annealing process is 700° C., and the heating time is 1 hour. The constant temperature of the continuous annealing process is 790° C., and the constant temperature time is 4.5 hours. The air-cooling temperature for the continuous annealing process is 600°C.

[0034] In the grinding step, a lapping plate is used as the grinding plate, and chromium trioxide is used as the abrasive for grinding. The water solvent for the lapping plate is a mixed water agent with the characteristics and functions of lubricating, cooling,...

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Abstract

The invention relates to a method for manufacturing a steel ball for a fan bearing, which comprises the steps of grinding, wherein the grinding step comprises a hot heading machining process and a continuous annealing process. The hot heading machining process and the advanced continuous annealing process can tighten tissues in the steel ball, and are favorable for enhancing the bearing capacity of the steel ball against impact and improving the bearing load of the steel ball; and the method solves the problems that the steel ball for the fan bearing prepared by the existing method for manufacturing the steel ball for the fan bearing has low capacity against the impact, small bearing load and short service life.

Description

technical field [0001] The invention relates to a method for manufacturing steel balls, in particular to a method for manufacturing steel balls for fan bearings. Background technique [0002] Most of the current steel balls for fan bearings are rolled and extruded. Now the raw materials are heated to 850°C to 900°C, and then pressed with special extrusion abrasives, and then annealed. The temperature of the annealed Generally between 750°C and 800°C. [0003] However, the existing steel balls for fan bearings manufactured by the above-mentioned process have low impact bearing capacity, small bearing load and short service life. Contents of the invention [0004] The purpose of the present invention is to propose a manufacturing method of steel balls for fan bearings, to solve the problem that the steel balls for fan bearings produced by the current manufacturing method of steel balls for fan bearings have low impact bearing capacity, small load carrying capacity and long ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/32B21K1/02C21D1/30C21D1/32
Inventor 徐华郑晓懿
Owner 上海钢球厂有限公司
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