Unlock instant, AI-driven research and patent intelligence for your innovation.

Processing technique for ceramic balls

A processing technology and technology of ceramic balls, applied in the direction of metal processing equipment, manufacturing tools, spherical grinders, etc., can solve the problems of not considering environmental protection requirements, low-end use of ceramic balls, etc., and achieve the effect of ensuring quality and reliability

Active Publication Date: 2010-06-16
LUOYANG BEARING RES INST CO LTD
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents are all aimed at improving Si 3 N 4 The general indicators such as shape accuracy, dimensional accuracy, and surface quality of ceramic balls are for the purpose, and Si 3 N 4 Ceramic balls are used at the lower end, especially those that do not use Si 3 N 4 The dynamic performance of the ceramic ball is the technical goal; at the same time, the above patents all use kerosene, spindle oil and other oils as abrasives, without considering environmental protection requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, the supporting bearing H7004 / HQ1P4 of Φ6.35mmSi 3 N 4 Ceramic ball as an example

[0023] (1) Coarse grinding: Ceramic balls are placed on a circulating machine tool for rough grinding, and the particle size is 80 at the beginning. # For silicon carbide, when the remaining 0.15mm of processing size in this process is replaced by W40 silicon carbide, the abrasive is ordinary hard grinding fluid and water, the ratio is 1:1, and the surface roughness Ra of the ceramic ball after rough grinding is 0.4μm. The spherical error and batch diameter variation are 2μm, the speed is 38 rpm, and the pressure is 35kN;

[0024] (2) Fine grinding: The fine grinding machine tool is a vertical steel ball grinding machine, which must be equipped with a shovel plate. The abrasive is W3.5 silicon carbide micropowder, and the abrasive is ordinary hard grinding fluid and water. The ratio is 1:1. After fine grinding, the surface roughness Ra of the ceramic ball is 0.1μm, ...

Embodiment 2

[0029] In this embodiment, the supporting bearing H7003 / HQ1P4 of Φ5.556mmSi 3 N 4 Take ceramic balls as an example.

[0030] (1) Si 3 N 4 Performance evaluation of ceramic materials: including billet shape, density, hardness, internal structure, porosity, crushing load, fracture toughness, surface defects, fluorescent flaw detection, and the above indicators can meet the requirements of GJB 5332-2004;

[0031] (2) Coarse grinding: Ceramic balls are placed on a circulating machine tool for rough grinding, and the particle size is 90 at the beginning. # Cubic boron nitride, when the processing size of this process is 0.1mm, replace it with W28 cubic boron nitride or alumina. The abrasive is ordinary hard grinding liquid and water, and the ratio is 1:2. The roughness Ra is 0.4μm, the spherical error and batch diameter variation are 1μm, the speed is 30 rpm, and the pressure is 30kN;

[0032] (3) Visual appearance inspection: After the rough grinding process, all the visual a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Surface roughnessaaaaaaaaaa
Surface roughnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a processing technique for ceramic balls, comprising coarse rubbing, fine rubbing, initial grinding and polishing the ceramic balls, evaluating performance of initial ceramic material, detecting overall visual appearance after coarse rubbing and inspecting overall microscopic appearance of ceramic ball finished product. By using the processing technique in the invention, the ceramic ball processing is enhanced from satisfying static performance index to the height that dynamic performance and quality are consistent, thus conforming to development direction of bearing industry; in actual measurement for Si3N4 ceramic ball finished product, the single ball vibration amplitude reaches 30-33Db, much less than the requirement of single ball vibration Z3 stipulated in JB / T 8923-1999; the overall procedure of the invention adopts environment-friendly aqueous grinding fluid, confirming to national industry policy; overall microscopic appearance inspection to Si3N4 ceramic ball finished product is adopted, thus effectively ensuring quality of ceramic ball finished product to be reliable.

Description

technical field [0001] The invention relates to a ceramic ball processing technology, in particular to a Si ball with a low vibration value and a tolerance level of G5. 3 N 4 Ceramic ball processing technology. Background technique [0002] Studies have shown that Si 3 N 4 A typical failure mode for ceramic balls is contact fatigue spalling consistent with steel balls. Ceramic ball material defects and surface processing defects are one of the key reasons for fatigue damage on the surface of ceramic balls. The existing ceramic ball processing technology inevitably produces the above-mentioned defects on the surface of ceramic balls. However, ceramic balls used in high-power, high-speed, and high-rigidity working conditions require not only high shape accuracy, dimensional accuracy, and surface quality. , and for Si 3 N 4 The dynamic performance of ceramic balls, that is, the vibration value of a single ball and the quality consistency of ceramic ball batches have high...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B24B11/04
Inventor 陈志军张永乾张玲李县辉孙永安于琦孔永刚王宇虹张利娟朱莉峰
Owner LUOYANG BEARING RES INST CO LTD