"Double peak" grinding wheel has serious quality problems

Recently, the General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) notified the results of the national supervision and inspection of the quality of the grinding wheel products, and the fixed abrasive fiber reinforced resin cutting wheel produced by Lixing Grinding Wheel Factory of Zhangzhou City was unsatisfactory. The reason for the failure is mainly that the 10 pieces of fiber-reinforced resin-cutting grinding wheels that have been inspected all show turning and breaking when the requirements of the inspection speed are not met, which is a serious quality problem.

This time, 200 kinds of grinding wheel products produced by 197 enterprises in 11 provinces including Hebei, Liaoning, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Shandong, Henan, Hubei and Guangdong were supervised and spot-checked. According to the mandatory national standard GB2494-2003 "General abrasive safety rules", recommended national standards GB/T2485-2008 "consolidated abrasive technical conditions" and industry standard JB/T6353-2006 "consolidated abrasive resin and rubber sheet "Wheel Wheel", JB/T3715-2006 "Consolidation Abrasive Grinding Wheel", JB4175-2006 "Consolidated Abrasive Fiber Reinforced Plastic Cutting Wheel" and other standards, appearance defects, dimensions, Seven items including shape and position tolerance, hardness, static imbalance, swing test and sign were tested and found to be unqualified.

It is understood that among the unqualified products, there are 17 kinds of grinding wheel, fiber reinforced resin cutting wheel, ceramic flat grinding wheel and resin flat grinding wheel. The hole diameter is unqualified, and the grinding wheel diameter is too large or too small, which will cause the grinding wheel to be in use. Broken in the middle. The hardness of the four kinds of ceramic flat grinding wheels is unqualified. The hardness of the grinding wheel plays a key role in the efficiency of cutting and grinding. The hardness of the grinding wheel is soft and hard, which is compatible with the material of the workpiece to be processed. The hardness is not high and the hardness is hard.

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