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- W2181596708 abstract "The requirements to parametric design methods in car body construction are changing by the increasing application of high strength materials and in addition by the subsequently ongoing development of CAD- and PLM-Systems. The optimization of geometry elements and mainly the adjustment of all depending geometry objects refers today no longer only to one forming process and its tools. The optimization rather refers to a complex chain of forming stages and all involved tools. The presented paper analyses the changes and the resulting new boundary conditions for CAD applications used in production planning and construction to support the tool making process. The development of single associative-parametric solutions, named features, within the given base PLM system is needed. Thus also new stable mathematical algorithms for surface and solid design are required. Parts made of high-strength steel show more spring back effects than ordinary steel. The compensation of these effects by adjusting tool geometry will be necessary, in order to manufacture accurate parts for car body assembly. The compensated tool surfaces are computed and optimized today by means of FE simulation. This leads to a mesh based description of the compensated surfaces. To initialize the processes of solid tool design and tool machining one needs a CAD format thereof. The effort of converting this mesh based surfaces coming from production planning into a form which is applicable in solid tool design and machining is becoming more and more a global bottle neck in the work flow of virtual tool making. Three new CAD applications are presented, which accelerates the tool design and at least the machining of tools substantially. The first solution describes a method to automatically convert the optimized spring back compensated surface given in discrete mesh data to continuous NURBS face data. It serves as bridge between FE simulation and further design steps, done in CAD- or PLM-environment. The second solution covers the quick die design, which is requested in production planning. The method available today is to discretely design die addendums which are automatically augmented to a continuous NURBS face format. The production planner then receives a surface model consisting of so called “active faces”, which prepares the solid tool design and tool machining without any need of rework. The third solution describes a parametric method for the automatic computation of the bases bodies and active faces which are required to design and manufacture trimming steels." @default.
- W2181596708 created "2016-06-24" @default.
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- W2181596708 date "2007-01-01" @default.
- W2181596708 modified "2023-09-27" @default.
- W2181596708 title "PARAMETERIZATION OF THE TOOL GEOMETRY AS A PREREQUISITE FOR THE SHAPE OPTIMIZATION OF TOOL SURFACES" @default.
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