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Method for producing accurate steel balls

A production method and technology of steel balls, applied to spherical grinding machines, surface polishing machine tools, machine tools suitable for grinding the edge of workpieces, etc., can solve the problems that cannot meet the requirements of high-quality steel balls, and achieve the effect of large potential capacity

Inactive Publication Date: 2007-10-10
SHANDONG DONGE STEEL BALL GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional steel ball production process generally adopts steel ball cold pier, light ball, quenching and tempering heat treatment, hard grinding, primary grinding, fine grinding and other processes, but it still cannot meet the requirements of high-quality steel balls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of production method of precision steel ball, comprises the steps:

[0023] (1), steel ball cold pier:

[0024] The light drawn steel wire is processed into a steel ball blank by high-speed or low-speed cold pier machine, the blank machining allowance is 30-40mm, and the displacement deviation is less than 0.06-1.2mm;

[0025] (2), rough processing:

[0026] Roughly process the above-mentioned steel ball blanks, one is to process the blanks with a light ball machine, the processing speed is 100-140r / min, and the pressure is 100-250KN; the other is to use a ball grinding machine after processing the light ball machine Soft grinding, processing speed 60-120r / min, pressure 40-70KN;

[0027] The grinding amount of steel ball rough machining is 0.15~0.25mm;

[0028] (3), heat treatment:

[0029] The roughly processed steel ball blanks are heated and quenched in a mesh-belt electric furnace with a controllable protective atmosphere. The quenching heat...

Embodiment 2

[0042] Embodiment 2: Taking the production process of φ5.953mm (15 / 64in) steel balls as an example, the steel ball material is GCr15, and the abrasive material is alumina

[0043] (1) Steel ball cold pier: on the high-speed cold pier machine Z32G-5, the steel ball is lightly drawn and the steel wire is processed, and the blank size is φ6.3mm;

[0044] (2) Rough machining:

[0045]a. Processed on a light ball machine, the processing speed is 130r / min, the pressure is 150KN, the grinding amount is 0.05mm,

[0046] b. Carry out soft grinding on the ball grinding machine, the processing speed is 120r / min, the pressure is 50KN, and the grinding amount is 0.18mm

[0047] (3) Heat treatment: Quenching heating temperature is 830°C, heating time is 35min; quenching medium is diesel oil, temperature is 50°C; tempering heating temperature is 145°C, holding time: 120min, surface cold strengthening time is 5 hours, and the hardness after strengthening reaches HRC66.

[0048] (4) Finishin...

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Abstract

A technology for manufacturing precise steel balls includes such steps as providing the light-drawn steel wire, cold forging, shaping plus soft grinding, heat treating through heating, quenching and tempering in protective gas, cooling strengthening surface, hard grinding by abrasive ceramic disc, beautifying appearance by photoelectric eddy, ageing, cold treating, and superfine grinding.

Description

technical field [0001] The invention relates to a production method of precision steel balls, belonging to the technical field of steel ball production. Background technique [0002] my country's steel ball industry has a history of 56 years since it produced the first batch of products in 1948. From the perspective of technological progress and industry development, the development after the reform and opening up is the fastest stage. At present, my country's steel ball industry has been able to produce 0.5-200 Steel balls with more than 1 mm can be produced in batches with a precision of G1000~G10. The products are widely used in bearings, construction machinery, household appliances, automobiles, agricultural machinery, machine tools, motorcycles, metallurgy, chemicals, instruments and other industries. my country has become the world's The country with the most steel ball enterprises is also the country with the largest output. [0003] However, judging from the quality s...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21J5/06C21D9/36C21D11/00C21D10/00B24B11/04B24B31/00B24B31/14B07C5/00
Inventor 王作山
Owner SHANDONG DONGE STEEL BALL GRP
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