【Main use】

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 five 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 V: Vertical feed of dresser slider

Axis W: Horizontal feed of dresser slider

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】

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 0.092mm；Vup 0.060mm

Error of pitch diameter over a rotation of 360 degree     0.005mm

Error of pitch diameter over entire length of thread      0.090mm

Roughness  Ra 0.32μm

【Technical characteristics】

1、Employing a rear-mounted wheel spindle supported by hydro-static bearings, workpiece surface improves greatly。

2、The optimized workhead structure makes work spindle speed double, thus improving machine efficiency greatly。

3、The optimized CNC wheel dresser can dress grinding wheel into various required profiles

4、Oil chiller, high-flow and powerful cooling system and double-filtering system together ensure the temperature influence in grinding process to the minimum。

5、With the intelligent grinding software in man-computer interactive conversation，wheel dressing and grinding can be operated with convenience and accuracy。

【Main specification parameters】