把回弹量作为修改模具几何的基础，本文给出了一个获得优化模具几何的迭代算法。

The springback is extracted to be a basis of modification of die geometry. An iteration algorithm is given to obtain the optimum geometry of die.

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模拟结果与实际挤压结果较好的吻合，通过数值模拟方法，可以指导设计、修改模具。

Simulation results good agreement with the production, by numerical simulation method, we can guide the die design and modified, instead of the tryout and rework process like before.

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工具和模具制造商，使用各种金属，合金和塑料，修理和修改需要精确尺寸的定做，原型或专用工具，模具，工模，夹具和量具。

Tool and die makers make, repair and modify custom-made, prototype or special tools, dies, jigs, fixtures and gauges using various metals, alloys and plastics which require precise dimensions.

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