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    • 5. 发明专利
    • METHOD OF MACHINING CIRCULAR THREAD
    • JPH01228720A
    • 1989-09-12
    • JP5692788
    • 1988-03-10
    • FANUC LTD
    • MIYATA MITSUTOMATSUMURA TERUYUKIKAWAKADO SHINJI
    • B23G1/02B23G1/06
    • PURPOSE:To make it possible to simplify the preparation of an NC program by successively shifting a cutting point in each cycle with the use of data necessary for determining a tool path pattern in a circular thread cutting cycle and a cutting point in each cycle. CONSTITUTION:After a tool TL is positioned in accordance with NC data shifted to a tool point A, when an NC instruction during circular thread cutting cycle is inputted, a processor obtains the coordinate value of a cycle starting point Pi (i=1, 2...) at i-th [1 is an initial value of (i)] circular thread cutting cycle PLi with reference to a cycle starting point A. Further, the tool TL is shifted to the point Pi, and thereafter, the i-th circular thread cutting cycle having the point Pi as a starting point is carried out so as to shift the tool TL along a tool path PLi. Thereafter, the circular thread cutting cycle is repeated similarly while the cutting starting point P'i is successively shifted along an arcuate shape of the circular thread. Thereby it is possible to simply prepare an NC program.
    • 10. 发明专利
    • THREAD PROCESSING METHOD FOR THREADED-SEAL FORMING METAL MOLD
    • JPH03202226A
    • 1991-09-04
    • JP33825289
    • 1989-12-28
    • KEEPER KK
    • HIRAGAKI YOSHIO
    • B23G1/06
    • PURPOSE:To enable the processing of a high lead multiple thread against a high hard metal mold material by relatively moving a cutting tool on a conical lip-formed surface of a seal forming metal mold in the sprilal direction, and regulating the feeding of the cutting tool with increasing speed so that the feeding speed of the cutting tool is increased by the specified quantity corresponding to the increased quantity of the circumferential speed of the surface to be processed. CONSTITUTION:The work rotating speed and the cutting tool feeding speed are set so that a helix angle at the minimum diameter part 4 and the maximum diameter part 5 becomes the predetermined angle alpha in a conical lip-formed surface 3 of a threaded-seal forming metal mold made of the high hard metal mold material. Acceleration and deceleration for relatively increasing or decreasing the feeding of the cutting tool by the quantity of l=2pi X.tanbeta.tangamma (x means the minimum diameter of the lip-formed surface, means the lead angle, means inclination of a bus against an axis of the lip-formed surface) per one rotation is relatively given to the cutting tool feeding speed to cut the high lead thread. On the other hand, a cutting start position of the next thread channel is relatively dislocated by the predetermined number to cut.