Patent ID: 11897049
Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 1:
2. The retractable friction stir welding spindle according to claim 1, wherein, in the electric spindle system, the front bearing chamber (5) and the end face of the other end of the electric spindle shell (9) are fixed by bolts, the front end cover (3) is fixed on the left end face of the front bearing chamber (5) by bolts; the rear bearing chamber (12) is fixed on the right end face of the electric spindle shell (9) by bolts, a second angular contact ball bearing (13) is installed into a hole of rear bearing chamber (12), and the second angular contact ball bearing (13) is also assembled on a first step shaft on the right side of the hollow spindle (4).