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correlating parts and correlated plates can be classified into
three categories, which are one to one, one to many, many
to many, as shown in Fig. 8.2.2.1 One to one
It means the one correlating part and the one correlated
plate, as shown in Fig. 8a. For example, when the hook
screw is mounted on the upper die shoe or the bottom die
shoe or the stripper plate as shown in Fig. 6, the hook screw
is the correlating part while the upper die shoe or the
bottom die shoe or the stripper plate is the correlated part.
The hook screw hole is the connector. This kind of relation
is simple.
2.2.2 One to many
It means the relation between one correlating part and a
group of correlated plates, as shown in Fig. 8b. This kind of
relationship exists commonly such as a threaded fastener
connected two or three plates and pins located two plates.
There are also many such examples in relevant punch and
die structures. In Fig. 4, the slot punch is amounted by the
supporting plate and screw. The slot punch is the
correlating part that associates the punch holding plate,
stripper holding plate, and stripper plate and three holes
with different fits on the corresponding plate. In Fig. 5, the
die is the correlating part that results in three holes,respectively, on die holding plate, die backing plate, and
bottom die shoe. The die is amounted on the die holding
plate with an interference fit. The diameter of the circular
holes on the die backing plate and the bottom die shoe is
increasingly larger than the maximum contour size of the
scrap in order to let the scrap drop down smoothly.
2.2.3 Many to many
It indicates the relation between a group of correlating parts
and several correlated plates, as shown in Fig. 8c. In a set of
progressive die, assembles such as guideposts and bushes,
the pilot pins, and lifter pins are common components
which can be standardized. In Fig. 2, the assemble of
guideposts and bushes composed of ten parts associates
with the correlated three parts, upper die shoe, stripper
backing plate, and bottom die shoe. In Fig. 7, the pilot pin
assemble consists of plug screw, spring, cylinder pin, pilot,
and adjusting collar. The correlated parts are upper die
shoe, punch backing plate, punch holding plate, stripper
holding plate, stripper plate, and die holding plate.
Fig. 6 Composite hole for hook screw2.3 The descriptive model of plate holes and associated
parts
From the analysis of the relationship of the correlating parts
and the correlated plates, we can see that two conditions
must be met in order to achieve the correlated structure
design of holes on plates:
1. The size of the hole(s) on the correlated part(s) will be
determined by the correlating part(s).
2. When location of the correlating parts ismoved or the size
of the correlating parts is edited, so too do the holes on the
correlated plates.
Hence, we establish a descriptive model that views the
correlating parts as controller. The relationship model of
associated holes is defined as follows:
Class associated holes:
Correlating part (one part or a functional assemble)
Location points for the correlating part
Correlated plates (one or a group of parts)
Corresponding library features of holes (one or a
group)
3 Construction process for correlated hole design system
for progressive die
Parameterized die design takes changeable sizes of die
structure as parameters and then changes the die structure
sizes by means of a relationship formula for the parameters
so as to fulfill the design objectives. But in the relevant hole
design process for progressive die, some portions of the die基于级进模性能特性板孔设计的研究