Automatic positioning and clamping device for welding of elevator parts and using method of device

The invention discloses an automatic positioning and clamping device for welding of elevator parts and a using method of the device. The device comprises a base, a hydraulic assembly is fixedly connected to the center of the back face of the top of the base, supporting columns are symmetrically and fixedly connected to the middles of the left side and the right side of the base, guide rods are symmetrically and fixedly connected to the left side and the right side of the inner wall of the bottom of each supporting column, the center of the top of the supporting column is fixedly connected with an anti-attrition ring, the top of the anti-attrition ring is provided with a connecting column, one end of the bottom of the connecting column is fixedly connected with a limiting disc, and the center of the bottom of the limiting disc is fixedly connected with a buffer spring. According to the automatic positioning and clamping device for welding of elevator parts and the using method of the device, a low-speed motor