Steel wheel inner and outer rim chamfering process and mold thereof

The invention relates to the field of passenger car steel wheel rim manufacturing, in particular to a steel wheel inner and outer rim chamfering process. The process comprises the following steps that sheared long strip materials are rolled to be round and then are sequentially subjected to welding, flaring and three times of roll forming treatment, wherein during the first time of roll forming treatment, an outer side of a rim of a steel wheel is polished and chamfered; during the second time of roll forming treatment, the outer side of the rim is polished and chamfered, and an inner side of the rim is rolled and chamfered, so that an arc line is formed; and during the third time of roll forming treatment, the inner side and the outer side of the rim are rolled and chamfered to form a final curve. The invention further provides a mold and the like involved in the process. According to the steel wheel inner and outer rim chamfering process provided by the invention, no new step needs to be added on the basis