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1. 发明专利

JP2008110435A Machine tool having mechanism for sensing contact of tool and workpiece 有权
标题翻译：机床用于感应工具和工件接触的机床
公开(公告)号：JP2008110435A
公开(公告)日：2008-05-15
申请号：JP2006295216
申请日：2006-10-31
申请人： Fanuc Ltd , ファナック株式会社
发明人： HON YONPYO , EBIHARA KENZO , KAWAI TOMOHIKO
IPC分类号： B23Q17/22 , B23Q15/00
CPC分类号： G05B19/4015 , G05B19/404 , G05B2219/37387 , G05B2219/37405 , G05B2219/50027 , Y10T409/3084 , Y10T409/500164 , Y10T409/500656
摘要： PROBLEM TO BE SOLVED: To correctly detect a machining start position in a machine tool for super precision cutting, whose movable axis is supported by a fluid bearing. SOLUTION: A workpiece is mounted on a rotary table of a B-axis, and the rotary table is mounted on an X-axis of a linear drive axis. A tool is mounted on a Y-axis. Also, the Y-axis is mounted on the Z-axis. The X-axis is moved forward and backward every time when the Z-axis is moved by a predetermined amount, and a processing surface of the workpiece is scanned so as to judge whether a positional deviation of the X-, Y-, and B-axis reaches a reference value or more(S1, S3, S7, S8). The Y-axis is driven, so that the tool approaches the workpiece by a predetermined amount (S9, S10) for scanning. When the positional deviation of the X-, Y-, and B-axis reaches the reference value or more, it is judged that the tool comes into contact with the workpiece. Then, a contact point is stored as a machining start position, and the Y-axis is skipped, so as to move the tool in a direction separating from the workpiece by a predetermined amount. Therefore, a maximum projecting point on the machining surface of the workpiece can be simply detected as a start point. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了正确地检测用于超精密切割的机床中的加工开始位置，其可移动轴线由流体轴承支撑。
解决方案：工件安装在B轴的旋转台上，旋转台安装在直线驱动轴的X轴上。工具安装在Y轴上。此外，Y轴安装在Z轴上。每当Z轴移动预定量时X轴向前后移动，并且扫描工件的处理表面，以判断X，Y和B的位置偏差轴达到参考值以上（S1，S3，S7，S8）。驱动Y轴，使刀具接近工件预定量（S9，S10）进行扫描。当X轴，Y轴和B轴的位置偏差达到基准值以上时，判断刀具与工件接触。然后，接触点被存储为加工开始位置，并且Y轴被跳过，以便使工具沿与工件分离的方向移动预定量。因此，可以简单地将工件加工面上的最大突出点作为起点。版权所有（C）2008，JPO＆INPIT

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