覆盖件拉延模设计制造周期的长短和质量对新车型的开发周期、汽车产品的质量和竞争力有着直接影响。
The design and manufacturing time and quality of panel dies have direct effect on the development period, quality and competitive capability of new car.
通过极限拉伸比试验，研究了轧制、退火、拉伸温度、拉伸速度、拉延间隙以及压边力等工艺因素对镁合金板材成形性能的影响。
Through the limiting drawing ratio tests, the influences of rolling, annealing, blank holder force, drawing gap, drawing temperature and speed on the forming performance were investigated.
结果表明，全量理论可代替增量理论分析、计算拉延成形过程的力和变形等。
It is concluded that the total strain theory can be used as a substitute for the incremental strain theory to analyse the force and deformation in sheet metal deep-drawing process.
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