MANUFACTURE OF BLADE BODY

PURPOSE:To increase manufacturing efficiency and reduce manufacturing cost of blade bodies such as a pointed knife and the like by giving a plate material heat treatment after stamping a bending line on both sides of the plate material in press processing, blading the plate material after heat treatment and separating the bladed plate material at the bending line. CONSTITUTION:From a roll of plate material of stainless steel or the like wound in a coil, a plate material 10 is sent to a rewinding press process where a bending line 13 is stamped in an unit blade shape on both sides of the plate material 10 with a pair of chisels provided in the upper and lower style and, simultaneously, a cutout 14 and a through hole 15 are formed with a pair of a punch and a dies. Then after quenching the whole plate material at a heat reatment process, the plate material 10 is sent to a blading process where blades (double edge) 18 are formed on a right edge 12 of the plate material 10 by continuously grinding both sides in almost a V shape with a coil polishing machine or the like. Thereafter, the plate material 10 is separated at the bending line 18 by a dividing process and a blade body 40 is obtained as a singular body. An outside finishing process can be omitted by applying this kind of manufacture.