| 摘要 |
PROBLEM TO BE SOLVED: To provide a service life evaluating device for calculating torque operating on a machine element from a position command of a motor and for evaluating a service life of the machine element. SOLUTION: This device is provided with: a torque calculating part 11 generating a torque signal by determining a position, speed and acceleration of the machine element 11 based on the position command of the motor 9 and calculating the torque operating on the machine element 11 based on an equation of motion; a speed calculating part 19 generating a speed signal by determining the speed of the machine element 11 based on the position command of the motor 9; an operating time detecting part 17 generating an operating time signal by detecting operating time of the service life evaluating device; a service life calculating means 21 determining shortened service life amount of the machine element 11 from a predetermined basic service life based on the torque signal, the speed signal and the operating time signal; and a service life judging part 23 judging whether the service life of the machine element 11 has expired by comparing a cumulative value of the shortened service life amount with the predetermined service life value, and generating a service life expiry signal by judging that the service life has expired. COPYRIGHT: (C)2005,JPO&NCIPI
|
