| 摘要 |
1282459 Machine tool details; turret lathes; grinding KISTLER INSTRUMENT AG 31 July 1969 [8 Aug 1968] 38516/69 Headings B3B B3D and B3T A supervisory device for a machine tool is adapted to respond to excessive mechanical effects such as forces, vibrations, torques or accelerations exerted by a machining operation on a workpiece or on a tool, including one or several sensors, 3, 4, 5 and 6, for constantly determining such mechanical factors in various component directions, X, Y, Z, as well as an electronic comparison control device 10 which, when predetermined maximum values of the components of the mechanical factors are exceeded produces a control signal to : stop the machine; bring into operation a replacement tool or control the feed speeds and/or cutting speeds to obviate objectionable chatter or vibration and whereby the feed rates and cutting speeds are held closely to the permissible limits. The device can be adapted to receive values of the maximum permissible components for a number of different operations which are checked against the actual values in step with individual operations prescribed by a central control device 13. The central control device can feed the operational sequence to a storage device 18 which may consist of a magnetic tape system which is advanced step-by-step under the control of the central control device as the latter is operated to cause the machine tool to perform successive machining operations. The sensors are rigid and can embody piezo-electric crystals, piezo. resistive crystals or strain gauge strips. |
