Abrasives Wheel

Abrasive grinding wheels are core consumables for industrial processing. Their classification system is based on abrasive composition, binder characteristics and dynamic mechanical properties. Mainstream products are divided into four categories according to abrasive types: alumina series (including brown corundum, white corundum, chrome corundum), silicon carbide series (black/green silicon carbide), superhard materials (diamond/CBN) and composite abrasives (such as zirconium corundum). Alumina grinding wheels occupy 55% of the market share, among which brown corundum grinding wheels are suitable for rough grinding of 45# steel with a cutting ratio of 1:120; white corundum grinding wheels are used for fine grinding of mold steel with a surface roughness of up to Ra0.2μm.

The bonding agent technology determines the performance boundary of the grinding wheel. The ceramic bonding agent forms a microporous structure through sintering at 1200℃, which is suitable for high-speed precision grinding (line speed 60m/s); the resin bonding agent adds copper powder to enhance thermal conductivity, so that the temperature resistance of the cutting grinding wheel is increased to 300℃; the metal bonding agent (copper-based/cobalt-based) is matched with diamond abrasives, and the wear ratio is as low as 1:5000 when processing cemented carbide. The electroplated grinding wheel adopts a single layer of abrasives arranged in an orderly manner, achieving a shape accuracy of ±2μm in the processing of glass cover plates in the 3C industry.

Continuous innovation in structural design: 1A1 flat grinding wheel accounts for 60% of the total as the basic type, and 27 type grinding wheel with tapered hole is dedicated to the automatic tool change system of CNC grinders. The porosity of porous ceramic grinding wheel reaches 45%, which solves the problem of grinding burns in titanium alloy and increases the processing efficiency by 3 times. Smart grinding wheel has entered the practical stage, and the embedded RFID chip can monitor the cumulative grinding amount in real time with an accuracy of ±5%.

Industry standards strictly regulate safety performance. ISO 603 stipulates that the grinding wheel must pass the blasting test at 1.6 times the working speed, and EN 12413 requires the unbalance amount to be ≤15g·mm/kg. Environmentally friendly grinding wheel uses water-based binder, VOC emissions are reduced by 90%, and the penetration rate in the automotive manufacturing industry reaches 40%. The frontier field focuses on the development of ultra-precision grinding wheels, and nano-diamond grinding wheels have achieved sub-nano-level surface processing of optical glass.