Patent ID: 9162300
Filing Date: 2015-10-20
Classification: B23G,B24B

Abstract:
1. A method for polishing a ball screw comprising a screw shaft defining a screw axis, the screw shaft being formed with a screw groove having a lead and a lead angle, the method comprising the steps of: holding the screw shaft rotatably; rotating the screw shaft at a rotational speed about the screw axis; conveying a polishing tape continuously or intermittently, the polishing tape having a polishing portion traveled around an outer peripheral surface of a pressing roller, the press roller being configured to rotate about a rotational axis; guiding the polishing tape such that the polishing portion is traveled around the outer peripheral surface; pressing the polishing portion against the screw groove; tilting the pressing roller such that the rotational axis is aligned with the lead angle; oscillating the pressing roller linearly along the rotational axis; moving the polishing tape at a moving speed in a direction parallel to the screw axis; and synchronizing the rotational speed with the moving speed based on the lead.