| 摘要 |
<p>PURPOSE:To permit to decide instantaneously the abnormality in accordance with a work piece, a working machine, a tool and a working condition comprehensively by detecting a load being applied to the tool by a sensing means provided in the working machine and comparing it with a basic pattern or the like. CONSTITUTION:The detection of the load on a driving shaft is effected in a screw working exclusive machine 1 by the value of the electric power of a motor 4 to detect a load value P at every driving positions or driving times from a starting point and describe an original wave form 11. At first, the wave form is decided whether it is within the arrowable range of the basic pattern and the division of mountains and valleys are coinciding with the number of points of deflections or not, and when the abnormality is existing, a bad product is discharged. Next, the range K, for controlling the load value P, is specified and when the load value P exceeds the upper limit U, P, L, and the lower limit L, P, L, of the abnormality, the product is discharged. Further, the integrated value Q of the load value P in the integrating range W with respect to a control integration load value Q is decided and when it is out of the upper limit and the lower limit, the product is discharged. When these data exceed a working time allowable range, the maximum allowable working number and the allowable maximum faulty product frequency, the emergency stop of the machine is effected and the unmanned operation of the working machine may be promoted.</p> |
