本帖最后由 伊凡 于 2011-5-11 15:21 編輯 5 r; P6 s {% L' g9 M
L5 U. p( V' v7 R' e1 C" UA jig is a device, which holds and supports the work and also guides the path of the' D2 D8 k% }; v' P$ P2 E# i
cutting tool, as the operation is performed. Jigs are used extensively for operations such as8 i% ?, p2 Y4 Z4 E
drilling, reaming, tapping and counter-boring. The jig need not be secured to the machine.+ ^ O; \1 N" w& Z1 J8 \- C
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A fixture is a device which locates and holds the work securely in a definite position. It
/ B- a. t. g: U4 H( q. \is usually secured to the table of the machine and it does not guide the cutting tool. The cutting2 |1 W4 r0 S5 f4 \4 H
tool is either moved into position for the operation or the table is moved under the cutting tool.
& k4 W' f6 v) R4 _Fixtures are used while performing milling, turning, honing, broaching, grinding and welding
' F7 V% h3 w# G8 Boperations.
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