High-grade car precision bearing steel ball fabrication process

A technology of precision bearing and manufacturing process, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of increased material loss, change of stress state, non-collision, etc., to improve material utilization, change stress state, etc. , the effect of material reduction

Inactive Publication Date: 2008-10-15
JIANGSU LIXING GENERAL STEEL BALL
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Problems solved by technology

The raw materials are generally ordinary bearing steel, and its ordinary material makes the steel itself not wear-resistant and impact-resistant; in the billet forming process, the raw materials are directly made into circular billets, billet rings and poles. Column, the quality of the steel ball forming cannot be guaranteed, and the material loss increases due to the ring belt of the ball billet
In addition, the entire process of ball forming by this method, including quenching and tempering processes, cannot effectively improve the plasticity of the material, change the stress state, and make the product prone to cracks; the principle of steel ball strengthening in the surface strengthening process is to use mechanical methods to strengthen the steel. The surface of the ball is impacted with a certain force and time to form a strengthening layer with a certain depth, and the residual stress is controlled between 800 and 1000Mpa. The traditional method is to mechanically impact the steel ball, b...

Method used

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Embodiment Construction

[0015] First select high-quality molded GCr15 bearing steel, and inspect it in accordance with SAC TC98.91-2006 "Rolling Bearing High Quality and High Quality Vacuum Refined GCr15 Round Steel", which is superior to the national standard, to ensure the stability and reliability of raw materials and reach the international advanced level.

[0016] Lightly draw the selected molded GCr15 bearing steel through a light drawing machine, so that the molded GCr15 bearing steel can be lightly drawn by 0.2-0.3mm to remove slight defects on the surface, unify the size and roundness, stabilize the cold heading forming compression ratio, and achieve strain Homogenization makes the material in a state of three-dimensional compressive stress, which is conducive to improving the plasticity of the material, changing the stress state, avoiding the appearance of cracks, and laying a good quality foundation for subsequent processing. After the light drawing is finished, the molded GCr15 bearing ste...

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Abstract

The invention discloses a process for manufacturing a precision bearing steel ball used in a high-grade automobile. The process comprises the following steps of the selection of raw materials, the cold heading and forming of ball billets, the heat treatment, the surface strengthening, the preliminary lapping and flaw detection, the super lapping of a resin wheel, the cleaning, the rust protection and the packaging; by technologies of the selection of raw materials, the forming of ball billets, the surface strengthening and the super lapping of a resin wheel, the surface quality and the geometric accuracy of the steel ball are further improved, thereby improving the quality of products.

Description

technical field [0001] The invention relates to a manufacturing process of a steel ball for cars, in particular to a manufacturing process of high-precision, wear-resistant and impact-resistant high-grade car-specific precision bearing steel balls made of molded GCr15 bearing steel. Background technique [0002] At present, the steel balls for cars on the market are relatively traditional in the selection of raw materials, the cold heading process of the ball billet and the surface strengthening process. The raw materials are generally ordinary bearing steel, and its ordinary material makes the steel itself not wear-resistant and impact-resistant; in the billet forming process, the raw materials are directly made into circular billets, billet rings and poles. Column, the quality of its steel ball forming cannot be guaranteed, and the material loss increases due to the ring belt of the ball billet. In addition, the entire process of ball forming by this method, including que...

Claims

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Application Information

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IPC IPC(8): F16C33/32
Inventor 施祥贵沙小建马林赵高明汤国华
Owner JIANGSU LIXING GENERAL STEEL BALL
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