Processing machine with numerical control apparatus
AssigneeYamanishi
InventorASAO YAMANISHI
Life of this patent
Estimating the term…
Abstract
A milling cutter is moved relative to a workpiece rotating about a given axis to thereby cut the workpiece into a last. A milling cutter moving apparatus moves the milling cutter in accordance with movement data stored in a memory. The movement data is such that when the milling cutter is moved relative to the rotating workpiece in accordance with the movement data, the cutting edge of the milling cutter, at each of the rotational positions of the workpiece, is at a location where it would contact the surface of the last if the last were rotated about the given axis.
Claims8
A processing machine with a numerical control apparatus, comprising:
- a rotary cutting blade having a cutting edge;
- memory means for storing movement data in accordance with which relative movement of said cutting blade and a workpiece rotated about a predetermined axis is provided to thereby cut the workpiece into a predetermined three-dimensional shape;
- and
- moving means for providing said relative movement of said cutting blade and said workpiece;
- characterized in that:
- said predetermined three-dimensional shape comprises a plurality of cross-section in planes perpendicular to said predetermined axis, at least one of said cross-sections is non-circular, has a different shape or size from at least one of the remaining cross-sections or rotated about said predetermined axis relative to at least one of the remaining cross-sections;
- and
- said movement data is such as to cause relative movement of said cutting blade and said workpiece in such a manner that if said predetermined three-dimensional shape were rotated about said predetermined axis, the locus drawn by said cutting edge of said rotary cutting blade when rotated would contact the surface of said three-dimensional shape at each of rotational positions thereof.
A computation apparatus for preparing movement data in accordance with which relative movement of a workpiece rotated about a predetermined axis and a rotary cutting blade, having a cutting edge, of a processing machine with a numerical control apparatus is produced, whereby said workpiece is cut into a predetermined three-dimensional shape, said processing machine further comprising:
- memory means for storing said movement data;
- and
- moving means for producing said relative movement of said cutting blade and said workpiece in accordance with said movement data;
- characterized in that:
- said predetermined three-dimensional shape comprises a plurality of cross-sections, each depicted by a contour line, in planes perpendicular to said predetermined axis, at least one of said cross-sections is non-circular, has a different shape or size from at least one of the remaining cross-sections or rotated about said predetermined axis relative to at least one of the remaining cross-sections;
- and
- said movement data is such as to cause relative movement of said cutting blade and said workpiece in such a manner that if said predetermined three-dimensional shape were rotated about said predetermined axis, the locus drawn by said cutting edge of said rotary cutting blade when rotated contacts the surface of said three-dimensional shape at each of rotational positions thereof.
Dependencies are inferred from the claim text.