Grinding device for hardware manufacturing

The utility model provides a polishing device for hardware manufacturing, and relates to the technical field of polishing devices. The device comprises a base, and is characterized in that two sliding plates are symmetrically arranged at the two ends of the base in a sliding fit mode, three first motors are fixedly installed in each sliding plate, first threaded rods are fixedly installed at the output ends of the six first motors, one ends of the first threaded rods are in threaded fit with sliding blocks, and the other ends of the first threaded rods are in threaded fit with the sliding blocks. And the peripheral sides of the three sliding blocks are jointly provided with a guide frame in a sliding fit manner. According to the steel pipe polishing device, the three clamping seats can be driven to be close to one another through the arrangement of the first motor, so that the steel pipes with different diameters can be clamped by the steel pipe polishing device, the steel pipes with different diameters can b