Main use
The machine is mainly used for grinding cylindrical,concial,Whitworth and circular internal threads.
NC system configuration
Working accuracy
1,Accuracy of cylindrical whitworth thread ground
Pitch error(within6mm)
adjacent pitch error 0.005mm
at a length of25mm 0.008mm
at a length of100mm 0.01mm
2,Roughness Ra0.4μm
3,Accuracy of cylindrical thread ground
Limit lead deviation 0.006mm
Accumulative error at a length of300mm 0.012mm
Technical characteristics
1,Driven by hydraulic,wheel dressing performs dressing automatically.The operator can shift between one-way or two-way grinding cycles.
2,The precision rolling bearings are used on the wheel spindle
3,A full-closed housing and an oil-mist extractor are provided with the machine
4,Work spindle is supported by the precision rolling bearings; its speed is stepless
5,The change gears can adjust the pitch to be ground
6,The whitworth thread or circular thread can be dressed with the help of changing different types of dressers
CNC LEADSCREW GRINDING MACHINE
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.
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