Belt wheel pulley surface processing method and belt wheel pulley surface processing grinding device

The invention relates to a belt wheel pulley surface processing method and a belt wheel pulley surface processing grinding device. Because the surface roughness curve of the belt wheel pulley surface can guarantee the friction coefficient and the antifriction performance, the processing can be carried out stably. Pulley surfaces (11) (12) of a primary belt wheel (1) and pulley surfaces (21) (22) of a secondary belt wheel (2) are provided with a metal chain, so pulleys (1) (2) of a CVT can carry out the stepless speed change. The belt wheel pulley surface processing method has the first procedure (81), the second procedure (82) and the third procedure (83). In the first procedure (81), the pulley surfaces (11) (12) (21) (22) of the belt wheel (1) (2) are subjected to the minitype shot blasting processing, so the surface hardness is formed, and then the uneven surface roughness of the pulleys of the belt wheels (1) (2) is flattened. In the second procedure (82), the depth of a groove on the pulley surface is ev