本帖最后由 伊凡 于 2011-5-11 15:21 编辑 ( _9 X4 h: q$ R' ~& R8 S7 i
5 G+ H( X! [' ^2 zA jig is a device, which holds and supports the work and also guides the path of the
2 x' I* p# Y7 J2 q; _0 gcutting tool, as the operation is performed. Jigs are used extensively for operations such as
# v3 f& |- v2 ~$ a2 zdrilling, reaming, tapping and counter-boring. The jig need not be secured to the machine.
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A fixture is a device which locates and holds the work securely in a definite position. It* h: b1 v& T% p' n. C9 P ~: K1 R: e8 o( H
is usually secured to the table of the machine and it does not guide the cutting tool. The cutting
4 l7 L9 P/ |# t1 U2 N8 Y4 k6 a+ Dtool is either moved into position for the operation or the table is moved under the cutting tool.) C1 J9 h6 k' t- e8 L& _9 K5 y
Fixtures are used while performing milling, turning, honing, broaching, grinding and welding# t, j& y( J" D4 @1 e
operations.
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