Rotation Strength Qualification Studies of Grinding Wheel

The quality of grinding wheel is related with people's life. High quality grinding wheel usually won't fail, and there would be no threat to people's life. On the contrary, inferior grinding wheel will threaten people's life, and if grinding wheel rotation strength is unqualified, it will also affect people's life and health.

Rotation strength refers to the resistance ability of rotating grinding wheel to rupture under the action of centrifugal force, which can reflect the tensile stress of the grinding wheel, and is a a very important indicator in grinding wheel manufacturing. To ensure the safe use of grinding wheel, the standard will mark the unqualified rotation strength as a "fatal flaw", namely "It  has dangerous or unsafe defect to users or devices ". The sampling inspection figures are: n=10, Ac=0, Rc=1; Namely, the rotation strength of random 10 pieces of grinding wheels must be completely qualified, as long as there is a piece of grinding wheel is unqualified, that is judged to be all unqualified. Quality spot checks show the rotation strength of fiber reinforced resin flake grinding wheel and depressed center wheel is not ideal. Some of them is lower than the highest speed, and some can not meet the provisions of the rotation speed and also some can reach the speed but not sustain the 30s.

Fiber reinforced resin flake grinding wheel and depressed center wheel need to be holded for cutting and grinding. Operators are at close range with grinding wheel, so once the rotation strength of grinding wheel cause the crushing in the process of cutting or grinding, it is easy to cause personal casualty accident.

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