Clamp for preventing machining deformation of thin-wall rotary part

The invention relates to a clamp for cylindrical turning of a thin-wall rotary part, and belongs to the technical field of cutting. According to the clamp, when cylindrical turning of a workpiece is carried out, a clamp body is specifically mounted on a three-jaw chuck of a lathe, the workpiece is arranged on the clamp body in a sleeving mode and is in clearance fit with the clamp body; and according to a screw and a nut, a conical surface of a cone body interacts with a conical surface of an elastic ring, so that the elastic ring is expanded to enable the outer circle of the elastic ring to be in close contact with an inner cylindrical surface of the workpiece. Compared with the prior art, the clamp has the remarkable advantages that machining rigidity of the thin-wall rotary part is enhanced, clamping and cutting deformation can be reduced, and machining precision is guaranteed. 本发明涉及种用于薄壁回转零件外圆车削加工的夹具，属于切削技术领域。车削工件外圆时将夹具体定安装在车床的三爪夹盘上,工件套装在夹具体上，并间隙配合;通过螺杆螺母，锥体的锥面与弹性圈的锥面相互作用，使弹性圈胀大至其外圆与工件内圆柱面紧密接触，本发明与现有技术相比，