(1) A type of scribing tool. It is a round or polygonal bar made of tool steel with one end sharpened. An awl is used to make small dots in the center of a hole or at the intersection of a scribing line, and a centering punch is used to make the dots larger. (2) A male mold in contrast to a female mold. In sheet metal processing, bending is performed using an upper and lower mold, or a punch and die, and in this case, the JIS (Japanese Industrial Standards) refers to the male mold as a punch. [Muneaki Shimura] [Reference item] | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
(1)けがき工具の一種。工具鋼でできた丸棒または多角形の棒の一端を鋭く研いだもの。目打ちは穴の中心やけがき線の交点に小さい点を打つのに使われ、目打ち点を大きくするのに心立ちポンチが使われる。 (2)雌型に対する雄型。板金加工で板素材を曲げるのに上型、下型あるいはポンチとダイスによる型曲げが行われるが、この場合、JIS(ジス)(日本工業規格)では雄型をさしてポンチと名づけている。 [志村宗昭] [参照項目] | |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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