43results about How to "Prevent deformation and instability" patented technology

The utility model provides a combined processing machine tool for external thread grinding and gear hobbing of shaft parts, which comprises a machine tool body, an external thread grinding mechanism, a gear hobbing mechanism, a driver, a sliding frame and a pair of head and tail frames, each head and tail frame is provided with a servo motor and a clamping device, and the clamping devices are driven by the servo motors to rotate. The pair of head and tail frames are oppositely arranged, the two ends of the shaft part are clamped and fixed through the clamping devices correspondingly, the positions, away from each other and close to each other, of the pair of head and tail frames in the axial direction of the shaft part are adjustable, and at least one head and tail frame is provided with a driver. The driver can drive the pair of head and tail frames to move in the directions away from each other and close to each other in the axial direction of the shaft part. According to the utility model, the shaft part is subjected to external thread grinding and gear hobbing in the state of being axially stretched, so that central holes do not need to be pre-processed at the two ends of the shaft part, meanwhile, the shaft part is prevented from being unstable and deformed, and the combined processing precision is ensured.