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Ch24-I044963.fm Page 116 Monday, August 7, 2006 11:27 AM
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(b)
(a) (a) (b)
Figure 3: TRV decomposed into Minimum Convex

! > •

(a)
(a)

(b)
(b)
Figure 4: Attributed MCPs and generated MFs
3.3 Generation of the desirable MFs

Manufacturing feature each of which is removed with a single machining operation is a combination of a number
of MCPs. Because the tool condition and cutting conditions keep unchanged without tool exchange, machining
MCPs attributed with the same demand information as one MF can guarantee the high quality. The MFs(MF set)
which can actualize the requirements are generated by recomposing the demand-attributed MCPs. System gathers
the MCPs which are demanded by the same description, and combine them into one machinable MF. For example,
two cylindrical MCPs with same concentricity and four MCPs sharing the same face which is required by the
same surface finish are shown in Fig.4 (a), and the desirable features generated are shown in (b) respectively.

1 level Z level
-•fv;

Figure 5: MCPs in different levels

3.4 Recomposition of remained MCPs to MF sets

In this step, the uncombined MCPs without any demand attribution are recomposed to obtain several sets of MFs.
Merging these MCPs in different ways leads to different MF sets. MCPs that generated through decomposition are