摘要:
Provided is a numerically-controlled machine tool (100) provided with: a tool measuring sensor (104) that measures the length and diameter of a tool (101); a workpiece measuring sensor (105) that measures the three-dimensional shape, and position and orientation of a workpiece (1) in a non-contact manner by laser beam etc.; and a control device (106), which, after determining the position of the machining starting point and the slope of a reference plane on the basis of information from the workpiece measuring sensor (105), on the basis of an inputted machining program, controls the movement of a main axis (102) etc. such that the workpiece (1) is machined from the information from the sensors (104, 105), and the position of the machining starting point and the slope of the reference plane, and controls the movement of the main axis (102) etc. in such a manner that the tool (101) is made to travel more quickly than the tool (101) travel speed in the machining program, in a non-contact manner, when the tool (101) is positioned in a non-machining region.
摘要:
A numerical control apparatus (1 or 20) comprising pecking operation controlling means (12) which make a feed drive system (14) retracted when a cutting load detected by cutting load detecting means (7) exceeds a reference value during a drilling process, the cutting load detecting means (7) comprise a bite load detecting section (8) to detect the cutting load at a biting stage wherein a tool bites a work piece, and a stationary load detecting section (10) to detect the cutting load after the biting stage. The numerical control apparatus (1 or 20) comprises pecking judgement means (11) to judge that the feed drive system (14) should be retracted when a fluctuation load exceeds a specified reference value wherein the fluctuation load is obtained by reducing the bite load from the detected stationary load. When it is judged that the feed drive system (14) should be retracted, the pecking operation controlling means (12) make the feed drive system (14) retracted.
摘要:
An apparatus for discriminating a machining state from a non-machining state in a machine tool wherein a workpiece is machined with a cutting tool or grinder, comprising plural vibration sensors including at least one acoustic-emission sensor, which detect vibrations of different frequency bands, respectively, which are produced during machining of the workpiece by the tool. A discriminating device judges that the workpiece is being machined by the tool when levels of output signals generated from at least two of the vibration sensors are higher than respective predetermined threshold levels, and judges that the workpiece is not being machined by the tool when the level of an output signal generated from less than two of the vibration sensors is higher than a predetermined threshold level. Also disclosed is a method for discrimination between the machining and non-machining states.