Auxiliary tools are used to facilitate processing and promote mass production and precision, and are made to match the processed part and the tool. For example, when drilling many holes in a part, if a mold with the exact relative positions of the holes is made, aligned with the part, and then the holes in the mold are used as a guide to drill, this will result in greater efficiency and precision than if the holes were drilled individually. Various types of jigs are made for different purposes, the main ones being hole-boring jigs, reaming jigs, welding jigs, and assembly jigs. The term "jig" is also used, but is not an academic term. (→ Fixtures) Jig |
加工を容易にし,量産化と精密化をはかるときに用いる補助工具で,加工部品と工具が整合するようにつくられる。たとえば部品に多数の穴あけをする場合,穴の関係位置が正確な型をつくり,部品に合せてから型の穴部を案内としてドリルで加工すれば個々に穴あけするよりも高い能率と精度が得られる。用途ごとに種々のジグが製作され,おもなものには穴ぐりジグ,リーマ通しジグ,溶接ジグ,組立てジグなどがある。なお,「治具」という用語も使われるが学術的用語ではない。 (→取付け具 )
ジグ
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