本帖最后由 伊凡 于 2011-5-11 15:21 编辑
8 C; S; x" N- G9 s
) B: v# [/ p: iA jig is a device, which holds and supports the work and also guides the path of the
8 M! g& g* a- A+ ], k1 K) p0 Scutting tool, as the operation is performed. Jigs are used extensively for operations such as% N7 \( c$ e. q9 U: w& ~
drilling, reaming, tapping and counter-boring. The jig need not be secured to the machine.) I) E6 E& U1 b, ^$ p/ ^( r
- ^$ W f- M9 c c A* a' E. o/ qA fixture is a device which locates and holds the work securely in a definite position. It
, V. V+ M2 [5 e# lis usually secured to the table of the machine and it does not guide the cutting tool. The cutting; X* H4 c6 N7 v
tool is either moved into position for the operation or the table is moved under the cutting tool.2 ] f# Q! F/ b5 w! V. f
Fixtures are used while performing milling, turning, honing, broaching, grinding and welding; E' @- V _' }
operations.$ ]# I5 ]( h- \
|
发表于 2011-5-10 17:26:12
我英文零分
