| 摘要 |
PURPOSE:To improve accuracy of machining in a corner part, by equipping a machine with a discriminator, which discriminates whether or not a machining speed reaches a predetermined value, and a setter, which automatically sets the predetermined value of said machining speed in accordance with a condition of the machining and its state, and controlling the machining speed to be locked to the predetermined value by a signal from the discriminator. CONSTITUTION:In finish machining, a discriminator 12 generates a signal when a machine decreases its cutting amount in an out-corner part or the like with a machining speed reaching a predetermined value. Here a setter 17 automatically deduces the predetermined value of the machining speed to be set from information of an electric condition of the machining from a control unit 11. While in the finish machining, a control unit 13, by the signal of the discriminator 12, controls the machining speed, when it reaches the predetermined value, to be locked so that the machining speed is prevented from increasing to the predetermined value or more. The cutting amount is started again increasing when the out-corner is finished, and the machining speed, if it begins decreasing to the predetermined value or less, is simultaneously released from being locked, being reset to a normal interpole servo. Consequently, the machine prevents an overshoot phenomenon, and, improves accuracy of the machining in the out-corner part.
|
