Page 176 - Modular design for machine tools

136 Modular Design Guide and Machine Tools Description

subscripts and symbols are added to the generalized description such
as follows to enlarge and enrich the obtainable information.
1. Kinds of the movement, i.e., principal (e.g., rotational movement in
TC), auxiliary (e.g., dividing motion), and complex (e.g., table rotat-
ing motion in NC milling machine) movements using the subscripts
2. Multiple form-generating functional units being connected with the
same adjacency units using + and ( )
3. Combination of rotational and linear movements, e.g., spindle of quill
type in milling head using the symbol ∩ (round hat)
4. Number of tools in the magazine and tool changing motion

In accordance with this description rule, the horizontal boring and
milling machine can be represented as shown in Fig. 4-4. Obviously the

Y
Z B C
Z
X

Extended functional description
X Z /Y Z C
B 0 1 1 1 1 1
Various machining methods possible
Z /C : Boring
1
1
/Z C : Drilling
1 1
X /C 1 : Face milling, groove milling (one-dimensional milling)
1
/Y C
1 1
Z /Y C
1 1
1
X /Y C
1 1 : Contour milling (two-dimensional milling)
1
X X /C 1
1 1
Z /Y C : Engrave milling (three-dimensional milling)
X 1 1 1 1
Suffixes 0 : Auxiliary motion
1 : Principal motion
Figure 4-4 Extraction of various machining methods from an extended
functional description.