Title:
SPECIAL WORM SCREW AND THREAD GROOVE CUTTING METHOD AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3265536
Kind Code:
B2
Abstract:
PURPOSE: To shorten the cutting time of the thread groove of a special worm screw by separating a cutting tool from screw base material every time the continuous cutting action of a specified cycle is terminated, and resuming cutting after adjusting the angle-of-rotation position of the screw base material into the initial position of starting slitting to cut the thread groove.
CONSTITUTION: Circular arc shape grooves connecting, at both ends thereof, a going thread groove A to a return thread groove F in relation to an axis are formed by connecting linear grooves B-E and G-J of different lead, and the quantity of cutting depth is increased every time the continuous cutting of one cycle from the groove A to the groove J is terminated. Every termination of the specified cycle, a cutting tool is once separated from screw base material, and cutting is resumed after readjusting the angle-of-rotation position where the slitting of the screw base material is started.
Inventors:
Hirofumi Machinaga
Kunitaka Kondo
Kunitaka Kondo
Application Number:
JP16776892A
Publication Date:
March 11, 2002
Filing Date:
June 25, 1992
Export Citation:
Assignee:
Tsugami Co., Ltd.
Shimamoto Seiko Co., Ltd.
Shimamoto Seiko Co., Ltd.
International Classes:
B23G1/02; B23G1/38; F16H53/08; (IPC1-7): B23G1/02; B23G1/38
Domestic Patent References:
| JP49125996A | ||||
| JP62105201A | ||||
| JP4876178A |
Attorney, Agent or Firm:
Fujio Sasashima