Fanuc Corporation

Fujitsu Fanuc Limited

Takao Sasaki

Kentaro Fujibayashi

Hideaki Kawamura

Toshiaki Otsuki

Kunihiko Murakami

Etsuo Yamazaki

Ryoji Imazeki

Masafumi Sano

Ryoichiro Nozawa

Ryouji Eguchi

Makoto Haga

Masahiko Hosokawa

Masahiko Miyake

Morimasa Sato

Teruyuki Matsumura

Yoichi Amemiya

Hideo Ogino

Haruhiko Kozai

Atsushi Shima

Shouichi Sagara

Takashi Endo

Syuji Matsuura

Mitsuo Kawamata

Ken Yasuda

Shuji Matsuura

Yasuhiro Saito

Masashi Yamaguchi

Takashi Endou

Shintaro Kageyama

Shigeru Isohata

Yoshitaka Takekoshi

Satoru Hirose

Disclosed is a method of screwing a pipe having threads with a different pitch on the outside and inside thereof into an object and assembling the same thereto by using a CNC machine tool. A male thread provided to a spindle is moved to an initial point I and point R by a quick traverse and then moved downward from the point R at a given speed and RPM. More specifically, a pipe is screwed into the object in accordance with the pitch of the thread on the outside thereof and assembled to a female thread of the object. When the male thread reaches a point Z and the pipe is assembled to the female thread of the object, the male thread is moved upward to the point R at a given speed and RPM. More specifically, the male thread is relieved from the pipe in accordance with the pitch of the thread on the inside of the pipe. Only the male thread is moved upward by the movement thereof to enable the pipe to remain engaged with the female thread, whereby the assembly of the pipe to the object is completed.

Method of screwing a pipe to an object

Pitch error compensating system

A gear pitch error correcting system for a numerical control apparatus used for a machine tool including at least one pair of gears provided in a transmission line through which the rotating force of a servomotor is transmitted to a driven member. Gear pitch error correction values for the respective gears, which each correspond to a predetermined gear angle and collectively cover one gear rotation, are stored in a nonvolatile memory. A pitch error computing means (E) refers to a current position register (D), reads out pitch error correction data (14b) corresponding to the current position from the nonvolatile memory, and adds up the data to obtain a superimposed pitch error correction value. The superimposed pitch error correction value and an interpolation pulse from an interpolating means (B) are added together by an adder (C), to obtain a pitch error-corrected output pulse, which is then supplied to an axis control circuit (18). Accordingly, even with a relatively small number of gear pitch error correction values for the individual gears, a gear pitch error correction can be precisely executed in proportion to the superimposing of the gear pitch error correction values.

Gear pitch error correcting system for numerical control apparatus

Numerical control apparatus using fuzzy control

Cylindrical interpolation system

System for controlling three-dimensional coordinate transformation

Numerical control apparatus

Acceleration/deceleration control method for a numerical control device

Involute interpolation speed control system

Method of correcting error on involute interpolation

Method of correcting machine position change

Feed speed control method for a numerical control device

Spindle control command method

Growing community of inventors

Hachioji, Japan

Takao Sasaki