| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw groove machining method for a ball screw for obtaining satisfactory surface roughness, shortening machining time of the whole screw groove, and reducing cost. SOLUTION: In this screw groove machining method for the ball screw comprising a process for machining a screw groove 2a in a workpiece W made of a raw material and a process for quenching the machined workpiece W, a general-purpose cutting tool 6 having smaller nose radius R2 of a cutting edge 6a than radius of curvature R1 of the screw groove 2a is used and is moved by effective length of the screw groove 2a for a plurality of times, and a travel path at each time is sequentially deviated in the circular arc direction of a cross sectional shape of the screw groove 2a to machine the whole screw groove 2a and set the nose radius R2 of the cutting edge 6a and an indent angleαso that height of a tool mark of the screw groove 2a becomes 2μm or less in a machining process. Consequently, desired surface roughness is obtained in the screw groove 2a, and molding machining of the screw groove 2a is completed by point cutting. COPYRIGHT: (C)2007,JPO&INPIT
|
