초록 ▼

A versatile thread grinding machine includes a grinding wheel with concentric thread forms thereon, rotatable about a first axis, and a work spindle which is rotatable about a second axis. Both the angularity and distance between the axes may be varied. In order to produce threads having different l

A versatile thread grinding machine includes a grinding wheel with concentric thread forms thereon, rotatable about a first axis, and a work spindle which is rotatable about a second axis. Both the angularity and distance between the axes may be varied. In order to produce threads having different leads with a single grinding wheel, the work spindle is provided with externally threaded sections having different leads which are integral multiples of the grinding wheel thread pitch. One of a correspondingly threaded set of inserts is brought into engagement the corresponding threaded section, to produce the desired lateral feed rate of the workpiece.

대표청구항 ▼

In a thread grinding machine comprising a grinding wheel having a first axis of rotation, and a periphery with plural concentric tooth forms thereon having a given pitch, means for supporting the grinding wheel on an axis of rotation, means for rotating the wheel about said axis, a work spindle havi

In a thread grinding machine comprising a grinding wheel having a first axis of rotation, and a periphery with plural concentric tooth forms thereon having a given pitch, means for supporting the grinding wheel on an axis of rotation, means for rotating the wheel about said axis, a work spindle having a second axis of rotation, means for supporting said work spindle for rotation about said second axis, and a chuck, supported by said work spindle for rotation a workpiece, the improvement comprising means for both rotating said work spindle and feeding said workpiece laterally with respect to said grinding wheel various integral multiples of said grinding wheel pitch per work spindle revolution, whereby threads of said given pitch, but different leads, may be produced by a single grinding wheel.