4 do grinding and safety protection Grinding machine safety protection device is mainly grinding wheel cover. In addition, when grinding and finishing, also should pay attention to prevent wear debris and broken grains of sand and grinding fluid and the formation of the splash water mist diffuses, lest affect the operator's health and cause environmental pollution. Once broken, grinding wheel cover can prevent the wheel debris from equipment and personal injuries caused by flying. Practice shows that reasonable design of the grinding wheel shield can completely block grinding wheel debris flew out, so as to effectively protect the operator and equipment safety, but also have the operator safety protection should be implemented in a row. For example, recently in some branch of double end face grinding wheel broken incident is very alarming, double process operators for dressing grinding wheel is convenient, the grinding wheel on the shield cover of eight fastening screw unexpectedly didn't screw in, the result when a grinding wheel (7 5 6 0 0 * * 50 a 80 K B) suddenly broken occurs, the lid on the wheel guard bursts with 3 m, how far nearly caused the tragedy of death. So when grinding safety more require the operator to have a high level of security awareness and compliance protective consciousness. In short, as long as you can from the above several aspects of the analysis, the methods and measures of implementing the content of the safety requirements, accumulate over a long period of summary analysis, and constantly improve and supplement, we will greatly reduce the events of the grinding wheel broken, will be sufficient to protect the operator's personal safety and property safety of the factory. Above is some experience of the author, in line with the purpose of the study with everybody together, have access to, please refer to our national standard.&nbsp