3 Fundamentals of press design

130 Sheet metal forming and blanking
The timetable of an SE project
Within the context of the production process for car body panels, only
a minimal amount of time is allocated to allow for the manufacture of
the dies. With large scale dies there is a run-up period of about 10
months in which design and die try-out are included. In complex SE
projects, which have to be completed in 1.5 to 2 years, parallel tasks
must be carried out. Furthermore, additional resources must be provided
before and after delivery of the dies. These short periods call for precise
planning, specific know-how, available capacity and the use of the
latest technological and communications systems. The timetable shows
the individual activities during the manufacturing of the dies for the
production of the sheet metal parts (Fig. 4.1.7). The time phases for
large scale dies are more or less similar so that this timetable can be considered
to be valid in general.
Data record and part drawing
The data record and the part drawing serve as the basis for all subsequent
processing steps. They describe all the details of the parts to be
milestones:
pre-production
specifications production release
purchasing release
series pilot series series
start of SE project
pre-planning
project planning
process planning
CAD data
draw development
prototype parts
die design
casting models
casting
machining
bench work
Fig. 4.1.7 Timetable for an SE project
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
design die production die
development
home try-out
series try-out