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The traditional trial-and-error methods are inefficient for complex dies.
This chapter presents a methodological scheme for a reduction of both the try-out and lead-time of complex dies.
With the growing demands to machine complex dies, moulds, aerospace, automotive, and biomedical parts in shorter cycle time, the utilization of Non-Uniform Rational B-Spline (NURBS) toolpaths has become more important than ever before.
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However, industries require modeling of complex die shapes in the computations.
The plan to build a marina and shopping complex died under community opposition, replaced by plans for a park.
Although simplified mathematical model has been used to calculate the extrusion pressure or speed, more frequently die design and extrusion process optimization depend on trial and error, which is especially true for complex die and preform design.
In general, the porthole die extrusion process consists of three stages (dividing, welding, and forming stage) through the complex die structure composed of container, porthole, mandrel, welding chamber and bearing part.
Instead of leaving the pool, the trio were swept along by strong currents and disappeared over the next tier of the river complex, dying when they were then thrown down a 15-metre waterfall.
In forming simulation with the inverse method, multi-step inverse analysis is difficult to apply because sliding constraint surfaces and initial guesses of intermediate steps described by complex die and punch set are hard to generate with present mapping schemes.
It was not a moment too soon for residents, who said that for years, lawsuits, complaints, and letters to politicians had done little to solve the problems, even after a woman in another building in the complex died in a 2002 elevator accident.
The authors argue that climate change could make such complex die-offs more common.
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