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专利名称：Contact detecting apparatus发明人：Kunihiko Eto,Shiro Seki,Kaoru Owa申请号：US06/160542申请日：19800618公开号：US04329771A公开日：19820518
摘要：A contact detecting apparatus for detecting the contact of a workpiece and atool which comprises a coil mounted on the periphery of a spindle head and connectedto an AC power source for generating an induced current in a first looped secondarycircuit formed by the workpiece, a work table, a machine bed, a column, a spindle head, atool spindle and a tool in the tool spindle when the workpiece and the tool are movedrelatively into contact with each other, and a second looped secondary circuit formed bya tool change device, the tool, the tool spindle and the spindle head when a tool changeoperation is performed. A detector is connected between the AC power source and thecoil for detecting a change in an electrical signal caused by contact between theworkpiece and the tool or contact between the tool change device and the tool tooutput a contact detecting signal. Another detector is provided to detect that a contactdetecting signal is not generated, even if a tool change operation has been performed.
申请人：TOYODA KOKI KABUSHIKI KAISHA
代理机构：Oblon, Fisher, Spivak, McClelland & Maier
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