Ball screw grinding machine SK7450A×50

CNC4-axisprecision

This machine is mainly used for grinding screws with Whitworth & Acme threads and ballscrews precisely 【NC system configuration】 1、Equipped with a SIEMENS 828D CNC system，the machine is controlled with four programmable axes including three synchronous ones。 2、No. of programmable axes Axis Z: Longitudinal feed of wheelhead (with grating scale) full close-looped Axis X: Cross-feed of wheelhead Axis C: Rotation of work spindle (with angular encoder) full close-looped Axis Y: Vertical feed of dresser Out of above NC axes, C-axis and Z-axis are linked to perform thread movement；Wheel dressing is conducted by a formed diamond roller； Two electric hand-wheels can control each NC axis by hand。 【Working accuracy】 1、In accordance with the Chinese standard concerned, the pitch error of a screw with pitch not longer than6mmis surely less than the followers；V2πp 0.006mm； V300p 0.012mm；Ep 0.062mm；Vup 0.041mm 2、Error of pitch diameter over a rotation of 360 degree，Error of pitch diameter over entire length of thread，Roughness Ra 0.32μm 【Technical characteristics】 1、The optimized workhead structure makes work spindle speed double, thus improving machine efficiency greatly。 2、No. of programmable axes Axis Z: Longitudinal feed of wheelhead (with grating scale) full close-looped Axis X: Cross-feed of wheelhead Axis C: Rotation of work spindle (with angular encoder) full close-looped Axis Y: Vertical feed of dresser Out of above NC axes, C-axis and Z-axis are linked to perform thread movement；Wheel dressing is conducted by a formed diamond roller；Two electric hand-wheels can control each NC axis by hand。