Chrysler Models Engine Parts in Half the Time

22 May 1998
Chrysler Models Engine Parts in Half the Time
    AUBURN HILLS, Mich., May 21 -- Chrysler Corporation
is creating models for power train components in half the time and
saving an estimated $5 million in development by using a new design process,
based on CATIA(R) (Computer Aided Three-dimensional Interactive Application).
    The most dramatic example is the cylinder head for a new 1.6-liter engine
being developed by Chrysler for the Chrysler-BMW joint venture to be used in
future small cars.  The model for the cylinder head was developed in four
months, five months faster than any other cylinder head Chrysler has
developed.  Prototype tooling time was reduced from 16 weeks to eight weeks.
    Previously, computer development of parts were limited to points, lines
and surfaces.  Now, through a process known as solid modeling, Chrysler
engineers can create mathematical data for solid, three-dimensional parts.
Computer images are then transferred in mathematical data to "rapid
prototyping" machines that make those parts in hours, rather than days or
weeks.
    "As you can imagine, these parts are much more exact and that means better
quality for our customers," said Doug Livermore, Executive Engineer, Small Car
Platform Engine Engineering.  "We can create three-dimensional models in half
the time.  In addition, we can get that information to tooling suppliers up to
five times faster, depending on the model size."
    Parts can be tested sooner and engineers can give feedback faster,
according to Laura Rosenbaum, Small Car Platform Engineer.
    "We delivered that cylinder head to machine shops and production machine
tool builders 14 weeks ahead of schedule," Rosenbaum said.
    This CATIA application also allows Chrysler engineers to map the path
cutting tools take before the part is ever made, she added.
    Chrysler uses rapid prototyping processes, such as Fused Deposition Models
(FDM), Laminated Object Modeling (LOM) and Stereo Lithography Apparatus (SLA),
to make real parts from math data stored into a computer.