Title:
AUTOMATIC SPIRAL TAP GRINDER
Document Type and Number:
Japanese Patent JPH01115571
Kind Code:
A
Abstract:
PURPOSE:To efficiently automatically grind a screw slot of a spiral tap by obtaining the uppermost top position of cutting edge sequentially changing on the basis of dimensions of spiral tap while providing a control circuit for performing predetermined backing-off from said position in parallel to a NC device system. CONSTITUTION:Dimensions input through MDI 27 and I/O control circuit 28, such as nominal diameter D, number of screw threads worked, pitch P, number N of slots, slot width theta, torsion angle alpha of slot, relief amount (d), number of index threads, etc., of a spiral tap 4 permit predetermined calculation to be performed to detect the uppermost top position and the next uppermost top position on respective threads of spiral tap 4. Then, a motor 8 for rotating the tap 4, a motor 13 for automatically feeding the tap 4 axially and a motor 18 for automatically feeding a grinding wheel 16 orthogonally to the axis of tap are respectively synchronously rotated with reference to the respective detected uppermost top positions. Thus, predetermined backing-off is performed on all cutting edges of tap 4.
Inventors:
SAITO MASAO
Application Number:
JP27169687A
Publication Date:
May 08, 1989
Filing Date:
October 29, 1987
Export Citation:
Assignee:
MITSUI SEIKI KOGYO KK
International Classes:
B24B3/22; B24B51/00; (IPC1-7): B24B3/22; B24B51/00
Domestic Patent References:
| JPS624556A | 1987-01-10 | |||
| JPS61274865A | 1986-12-05 | |||
| JPS5189285A | 1976-08-04 |
Attorney, Agent or Firm:
Satoshi Takigawa