MACHINE TOOL

• Main Authors: SAKAMOTO KOSHIRO, MORIGUCHI TAKUYA
• Format: Patent
• Language: English; Japanese
• Published: 10.01.2019
• Subjects: COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING

To shorten a tool exchange time by using a main spindle device and an automatic tool exchange device that employs a cylinder.SOLUTION: A machine tool 10 comprises: a main spindle head 12; a main spindle 15; a draw bar 17; a driving cylinder 19 having a piston 19b and driving the draw bar; a displacement sensor 29 for detecting an amount of displacement P of the piston 19b; an automatic tool exchange device 37 having a plurality of grips 37p and a motor 37a; and a control device 40 having a storage device 41 for storing a command function 41a showing a command value θ0 for a phase θ of the motor 37a with respect to the amount of displacement P; a computation device 42 having command value computation means 42a for computing the command value θ0 based on the amount of displacement P and the command function 41a; and a driver 44 for driving the motor 37a.SELECTED DRAWING: Figure 3 【課題】シリンダを利用する主軸装置と自動工具交換装置とを用いて、工具交換時間を短縮する。【解決手段】工作機械１０は、主軸頭１２と、主軸１５と、ドローバー１７と、ピストン１９ｂを有しドローバーを駆動する駆動シリンダ１９と、ピストン１９ｂの変位量Ｐを検知する変位センサ２９と、複数のグリップ３７ｐ及びモータ３７ａを有する自動工具交換装置３７と、制御装置４０であって、変位量Ｐに対するモータ３７ａの位相θの指令値θ０を示す指令関数４１ａを記憶する記憶装置４１、変位量Ｐ及び指令関数４１ａに基づいて指令値θ０を演算する指令値演算手段４２ａを有する演算装置４２及びモータ３７ａを駆動するドライバ４４を有する制御装置４０と、を備える。【選択図】図３