| 摘要 |
PURPOSE: A manufacturing method of a bolt and a nut with thin thickness is provided to improve productivity, and to control quality of a product. CONSTITUTION: A manufacturing method of a bolt(2) with thin thickness comprises: a step of fixing a raw material(1) with pipe configuration of which the internal diameter is formed as square or hexagon, on a CNC(Computerized Numerical control) shelf; a step of processing screw threads on a surface; and a step of cutting into the thin thickness. A manufacturing method of a nut(3) with thin thickness comprises: a step of fixing the raw material with long pipe configuration of which an external diameter is formed as square or hexagon, on a CNC shelf; a step of processing screw threads on an inner surface; and a step of cutting into the thin thickness. [Reference numerals] (AA) Bolt; (BB) Nut; (CC) Raw material; (DD) Thread cutting; (EE) Thread cutting, cutting; (FF) Cutting;
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