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Processing method of high precision steel ball

A processing method and high-precision technology, which is applied in the field of processing high-precision steel balls, can solve the problems of product appearance, shape and size tolerance not meeting the standard requirements, batch processing, waste of man-hours, etc., to reduce labor input and production costs , heat treatment efficiency improvement, and the effect of ensuring quality

Inactive Publication Date: 2017-03-08
ANSHUN HONGYI SPECIAL STEEL BALL MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The appearance, shape and dimensional tolerances of products processed by conventional processes cannot meet the standard requirements, and the efficiency is low. Due to repeated positioning, the shape and position tolerances cannot meet the product needs.
If the current numerical control technology can meet the standard requirements, but it is a waste of man-hours to process such small parts with a numerical control machining center.
Waste of resources, the important thing is that the efficiency is low, the gain outweighs the gain, and it cannot be processed in batches

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for processing high-precision steel balls. For steel balls with a diameter of less than 12mm, the standard is steel balls with G5-level precision. Pickling appearance→secondary soft grinding→first heat treatment→hard grinding→second cold pickling appearance→corrosion removal→first stabilization→strengthening treatment→primary research→secondary stabilization→finishing→appearance selection→superfinishing→secondary Secondary heat treatment→oil washing→testing; specific processing methods include the following:

[0019] (1) Heat the steel rod and wire at 1350-1370°C for 1-2 hours, and then air-cool the steel rod and wire after rapid air cooling to 890-900°C at a cooling rate of ≥0.5°C / s and Automatic straightening is adopted, and the straightened steel rods and wires are docked with the cold heading rolling mill. The steel rods and wires are cut, stamped and rolled into small rolling sections in the cold heading rolling mill. After a soft grinding and hot pickling...

Embodiment 2

[0026] A processing method for high-precision steel balls. For steel balls with a diameter greater than 12 mm but less than 30 mm, the standard is a steel ball with G5 precision. The processing method includes the following steps: cold heading forming → annealing → light ball → First soft grinding → First hot pickling appearance → Second soft grinding → First heat treatment → Hard grinding → Second cold pickling appearance → Corrosion removal → First stabilization → Strengthening treatment → Primary research → Second stabilization → Fine grinding → Appearance selection →Superfinishing→Secondary heat treatment→Oil washing→Inspection; specific processing methods include the following:

[0027](1) Heat the steel rod and wire at 1360-1380°C for 1-2 hours, and then air-cool the steel rod and wire after rapid air cooling to 900-910°C at a cooling rate of ≥0.5°C / s. Automatic straightening is adopted, and the straightened steel rods and wires are docked with the cold heading rolling m...

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Abstract

The invention discloses a processing method of a high precision steel ball. The processing method comprises the following steps: cold heading forming; annealing; ball polishing; primary soft grinding; primary hot pickling for appearance; secondary soft grinding; primary heat treatment; hard grinding; secondary cold pickling for appearance; removal of a corrosion layer; primary stabilizing; strengthening treatment; primary grinding; secondary stabilizing; lapping; appearance selection; super-lapping; secondary heat treatment; oil washing; detection. The processing method of a high precision steel ball provided by the invention shortens the whole quenching and heat treatment time during processing by 50% or more, greatly improves heat treatment efficiency, greatly improves the spheroidization rate, hardness and strength properties of the processed steel ball compared with the steel ball with long quenching and heat treatment time, prolongs service life, satisfies relatively high quality requirements on the steel balls of the roller industry, not only reduces labor intensity, manual input and production cost, but also ensures the quality of products, and increases the added value of the products.

Description

technical field [0001] The invention relates to the technical field of steel ball processing in mechanical manufacturing, in particular to a method for processing high-precision steel balls. Background technique [0002] With the rapid development of machinery manufacturing industry, especially automobile, aviation, atomic energy and other industries, the requirements for bearing performance are constantly increasing. According to the service conditions of shaft parts, it is required that the surface of the parts should have high wear resistance, while the core part should show good strength and toughness. The traditional forming process of shaft parts often makes it impossible to balance the two, and the potential of the material is also limited. Less than full play. 9Cr18 stainless steel is a typical high-carbon chromium stainless bearing steel, which has many advantages such as high hardness, high strength and corrosion resistance. However, due to its high carbon and chr...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 张晶磊
Owner ANSHUN HONGYI SPECIAL STEEL BALL MFG
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