Page 14 - MetalForming Magazine February 2023 - Metal Forming for the Automotive Industry

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Tooling by Design
tially eliminate secondary processes such as heat treating, coating and nitrid- ing. Where such processes already are applied, peening improves the results.
Laser heat treating describes a process in which a laser beam focuses onto the tool-steel surface being treat- ed. With proper control, the laser ener- gy raises the surface temperature above its martensitic-transformation tem- perature. When the beam switches off, the thermal mass of the die section promotes rapid self-quenching, result- ing in formation of the desired marten- site microstructure and giving the material its required hardness and wear properties. This process increasingly has become popular due to precision control and application of heat to local- ized areas, resulting in minimal dis- tortion and residual stress input.
Testing various metal forming lubri- cants for comparison can be time-con- suming and risky to production tools, with many lubricant formulations based upon wet-bench chemistry, not actual field trials in an actual tool. Lubricant suppliers and manufacturing companies can take advantage of stan- dardized cup-draw-test tooling to eval- uate results for a variety of trial lubri- cants and sheet metal substrates. This may prove an especially important step in lubricant selection when processing different grades of AHSS materials. Test results show correlation to real-life press applications, thus limiting the risk to actual tools.
Real-time nondestructive produc- tion-monitoring tools have been used widely for various manufacturing processes such as joining and fabrica- tion. And now being realized: applica- tions of real-time and nondestructive evaluation tools to monitor and assess incoming coil properties, blank surface finish/lubrication, die stresses, part tem- perature, final stamping quality such as springback and geometry tolerances.
Eventually, your company or die shop must deal with disruptions cre- ated by new technology. Your response will be determined by how you perceive these disruptions. MF
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