| 摘要 |
PURPOSE:To shorten the working time of the whole working process without reducing a rate of operation by executing efficiently pretreatment and post- treatment, in case when an NC plasma cutting device has been introduced to a working process of a steel plate. CONSTITUTION:The surface of a steel plate 1 is cleaned, dried, etc., and a boundary of a part which becomes a necessary member and a remaining material, an external form line 5 of a member to be used, a member fitting line 6 for indicating a plate escape direction, a groove indicating symbol 7, a member symbol 8, a fitted member symbol 9, etc. are shown by using an NC marking-off device. Groove working 10 is executed based on the groove indicating symbol 7, and also cutting is executed to a part which becomes a remaining material. At the same time, cutting for forming a width direction positioning reference surface 12 is executed. When the steel plate 1 of a prescribed number is piled up, the steel plate 1 is removed by one piece each from the respective piles and fed to an NC plasma cutting device, and two steel plates 1 are arranged in parallel and the plate ends are made uniform. Subsequently, the steel plate 1 is divided into a necessary member and a remaining material by moving a torch block along the necessary member external form line 5. |
