Page 43 - MetalForming May 2017

strength ratios (such as low-strength aluminum alloys) require much tighter clearances, making chipping, wear and abrasion more problematic. Also, small variances in cutting clearance—as little as 0.5 percent material thickness per side—can have a dramatic effect on burr height, sliver production and tool wear.”
Springback compensation for high- strength steels and aluminum alloys also deserves careful attention, and Ulintz will address this during his pres- entation. And, some product and addendum geometry suitable for deep drawing of mild steel will not work for many aluminum alloys.
“Simple things like draw-bead pro- file design requirements can vary great- ly between temper grades within a sin- gle alloy,” he says.
Introduction to Simulation Technology
This presentation, by Jeanne He- Dubois, Dynaform Product Manager, ETA—Engineering Technology Associ-
ates, Inc., covers the two basic simu- lation technologies: the inverse (one- step) method and incremental meth- ods. Up for discussion:
• Simulation of drawing, springback, springback compensation, hydroform- ing, forging, trimline development, superplastic forming and hot forming.
• Advantages and limitations of sim- ulation software.
• Differences between incremental and one-step solvers.
• A discussion of the explicit and implicit simulation methodologies, and element/time-step/mass scaling/dy- namic effects.
“With increases in computing speed,” He-Dubois says, “the inevitable trend is the merging of simulation into the CAD environment. Designers now use sim- ulation technology directly as they design a tool. Some CAD packages already have merged one-step analysis into their design flow, and it’s just a mat- ter of time before incremental analysis will be inside of every CAD package.
“Full time simulation-engineer posi- tions are shrinking quickly,” she adds. “I will discuss the impact this trend will have on the industry.”
Next-Generation Simulation Leads Engineering
Beyond Just Validation
Adithya Ramamurthy, an applica- tion engineer at AutoForm Engineering USA, follows up with a discussion on using virtual simulation to identify potential forming issues that might occur during tryout and production. A subsequent trial-and-error approach can lead to identifying solutions to the forming issues encountered during evaluation of a simulation.
“The trial-and-error approach might work well for minor fixes or when a seasoned tooling engineer uses his vast experience for known issues,” Rama- murthy says. “It is a well-established fact that the trial-and-error approach, both in the toolroom and during sim- ulation, can waste time and resources.
Cimatron is now part of 3D Systems THINGS ARE GETTING BIGGER AND BETTER
As one of the early pioneers developing CAD/CAM software for manufacturing, Cimatron will continue its 33 year legacy going forward as part of 3D Systems.
Look forward to new opportunities for MANUFACTURING THE FUTURE!
For more information go to:
www.3dsystems.com www.cimatrontech.com
www.metalformingmagazine.com
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