| 摘要 |
PURPOSE:To control the extent of movement of a tool and to produce a high quality product by measuring component of force applied to the tool and calculating pressing force, and at the same time, detecting the position of the tool in the direction of rotation axis of a die and comparing outputted upper and lower limit values of set pressing force with the pressing force from the detected value. CONSTITUTION:Two components of force applied to a roll tool 4 are detected by strain gauges 7a, 7b of a tool holder 5 and converted to a signal by bridge boxes 8a, 8b and amplified by amplifiers 9a, 9b. Then, the analog signal is converted to digital signal by an AD converter 10, and true pressing force PyT is calculated to real time by arithmetic units 11, 12. On the other hand, the signal of a position sensor 14 is processed by an X-axis position measuring section 15 and X-axis of the tool is measured. Then, upper and lower limit values of pressing force set to the value of X-axis position from a reference table 16 is outputted, and compared with the pressing force PyT by a comparator 17. Data outputted from an NC data table 13 are converted, and the extent of movement of the roll tool 4 is controlled, and spinning work is performed. |
