摘要:
A numerical control (NC) device (10) for a machine tool (1) provided with a measurement probe (2b) effects measurements of the work (4) on the machine table (5) after a working process. The measurement program, generated by the NC device (10) by modifying the working program, controls the relative movement of the probe (2b) with respect to the work (4) such that the probe (2b) moves along the contour of the worked portion of the work (4) with a displacement from the neutral position thereof, wherein the displacement of the probe (2b) is sampled at a predetermined sampling period. A working error calculation program (17) calculates the working error from the sampled discplacements. If the working error is judged correctable, a correction re-working is effected so as to reduce the working error. The measurement/re-working cycles are repeated until the working error is within tolerance.
摘要:
A numerical control (NC) device (10) for a machine tool (1) provided with a measurement probe (2b) effects measurements of the work (4) on the machine table (5) after a working process. The measurement program, generated by the NC device (10) by modifying the working program, controls the relative movement of the probe (2b) with respect to the work (4) such that the probe (2b) moves along the contour of the worked portion of the work (4) with a displacement from the neutral position thereof, wherein the displacement of the probe (2b) is sampled at a predetermined sampling period. A working error calculation program (17) calculates the working error from the sampled discplacements. If the working error is judged correctable, a correction re-working is effected so as to reduce the working error. The measurement/re-working cycles are repeated until the working error is within tolerance.
摘要:
A numerical control device comprising means (9) having a table/function which represents the motor current of a servo motor, in a servo mechanism (2) for servo-controlling a mechanical movable part, which is detected at a given time instant and the corresponding amount of lost motion correction. The position error caused by the lost motion can be correctd with high accuracy.
摘要:
The apparatus comprises a torque limiter (3) for generating an elastic wave having a level higher than a given level in response to an overload being applied to a cutting tool (1). The cutting tool (1) is working on a workpiece (8) and is mounted in a tool holder (2) or the head portion (6) of a main spindle (5). A detector (11) is provided for receiving the elastic wave outside the cutting section and includes a detecting section (12), a high path-filter (13), an amplifier (14), a mean-valve detector (15) and an amplitude discriminator (16). The detector (11) is connected to a warning signal generator (17) and a controller (18) for effecting a protective counteraction in relation to the cutting tool (1), thereby preventing the cutting tool from being broken or damaged due to the overload.