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US 4,760,635 AGranted
Method of forming a helical ball screw member
Assignee20th Century Machine
InventorMichael A. Miller
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Assignee20th Century Machine
InventorMichael A. Miller
Estimating the term…
A method of forming a ball screw member from an elongated workpiece having an outer cylindrical surface, as well as the ball screw member formed by the method. A helical ball screw thread is machined on the outer cylindrical surface, the helical ball screw thread having a helical groove and a helical crest surface. An end journal or other end treatment is formed in the workpiece, the end journal or other end treatment being located during the forming operation relative to the helical crest surface. Alternatively the end journal or other end treatment is formed in the workpiece and the helical screw thread is then machined while the outer cylindrical surface is located relative to the end journal or other end treatment during the machining of the helical ball screw thread on the outer cylindrical surface. The outer cylindrical surface of the workpiece may be centerless ground prior to the machining of the helical ball screw thread. The helical crest surface may be ground after the machining of the helical ball screw thread to provide increased concentricity between components of the ball screw member. A high precision ball screw member may be formed from the ball screw member by performing a regrinding operation on the helical groove, the regrinding operation being positioned relative to the helical crest surface.
A method of forming a ball screw member from a workpiece having a first end, a second end opposite said first end, a longitudinal axis extending from said first end to said second end, a cylindrical portion interposed said first end and said second end, and a cylindrical outer surface on said cylindrical portion, said method comprising:
A method of forming a ball screw member from a workpiece, having a first end, a second end opposite said first end, a longitudinal axis extending from said first end to said second end, a cylindrical portion interposed said first end and said second end, and a cylindrical outer surface on said cylindrical portion, said method comprising:
A method of forming a ball screw member from a workpiece, having a first end, a second end opposite said first end, a longitudinal axis extending from said first end to said second end, a cylindrical portion interposed said first end and said second end, and a cylindrical outer surface on said cylindrical portion, said method comprising:
Dependencies are inferred from the claim text.