Standard
STD 101-0001
Volvo Group
Version
4
Page
10
Multiple connected cutting planes shall be used for offset sections. See figure 8.
Multiple connected cutting planes
Figure 8 – DSM with offset section
4.2 Digital shape model (DSM) requirements
4.2.1 General
Digital shape models (DSM) represent a part in ideal geometric form at a particular dimensional condition. Unless
otherwise stated as a general note in the general-notes annotation plane, the dimensional condition applied for
the model shall be that all features are modelled at the nominal size from which the upper and lower limits of size
are derived.
4.2.2 Geometric scale and precision
DSMs shall be modelled using scale 1:1.The model precision indicates the numeric
accuracy required in the production of the part in order to fulfil the design intent. The
number of significant digits of the DSM shall be specified in the data set. The number of
decimal places required for the design cannot exceed the precision of the DSM.
4.2.3 Model completeness
The model shall contain geometry, attributes and annotation as required to provide a complete definition of the
part. The model shall be constructed so as to provide a complete definition of the part. In the event this facility is
not used, e.g. in early stages
•
models not fully modelled shall be identified as such, e.g. a partially modelled symmetrical part,
•
features that are not fully modelled shall be identified as such, e.g. threaded holes that are only shown as
holes, and
•
thin parts for which the thickness has not been fully modelled, see figure 9.
