3 Fundamentals of press design

Fine blanking
Blanking plate 2 is located, positioned and fastened on the lower dieset
17. In special cases, for example where a split blanking plate is used or
extremely thick materials are being processed, the blanking plate 2
accommodates a shrink ring 19. The ejector 3, which is guided in the
blanking plate 2, is also responsible for guiding the inner form punches
4, and transmits the counterpressure and ejection force from the counterpressure
piston of the press via the pressure pins 13. The inner form
punches 4 are mounted on the piercing punch retaining plate 10 and
supported by the back-up plate 12.
The underlying principle of the fixed-punch die system is also used
for progressive blanking dies, compound progressive dies and transfer
dies (Fig. 4.7.25).In the case of progressive and compound dies, an additional
coil guidance system 1, an initial blanking stop 3, as well as pilot
17
15
19
8
2
5
12
6
4
10
Fig. 4.7.24 Fixed punch system, complete blanking die:
1 blanking punch; 2 blanking plate; 3 ejector; 4 inner form punch;
5 piercing punch; 6 inner form ejector; 7 ejector pins; 8 vee-ring plate;
9 pressure plate; 10 piercing punch retaining plate; 11 intermediate plate;
12 back-up plate; 13 pressure pins; 14 latch bolt; 15 guide plate; 16 upper frame;
17 lower frame; 18 gib unit; 19 shrink ring
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
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11
13
7
13
9
1
3
13
14
16
18
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