本帖最后由 伊凡 于 2011-5-11 15:21 編輯 9 z% v! ^( Y) R2 h
! K# q! k& h8 r) J! p5 _A jig is a device, which holds and supports the work and also guides the path of the C5 Y: s' d: t5 ?
cutting tool, as the operation is performed. Jigs are used extensively for operations such as) z1 j- Y* j0 u! z2 L
drilling, 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% F, F( ?$ I- F- ?/ H
is usually secured to the table of the machine and it does not guide the cutting tool. The cutting8 r! C" l: V# l6 X. b" S
tool is either moved into position for the operation or the table is moved under the cutting tool.
. ?% e, v$ O2 K( x; \) S! SFixtures are used while performing milling, turning, honing, broaching, grinding and welding! B/ M. I' `5 g( R
operations.& |4 p& ]& ?; \2 k! ~! b
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