本发明提供了一种异形截面钢材局部加热挤压工艺及其装置。工艺过程包括原料准备，对钢坯进行局部加热及通过挤压模挤压成型。
A locally heating and extruding technology for steel material with shaped cross-section includes preparing raw material, local heating steel blank, and extrusion forming with mould.
针对模具制造中遇到的微小异形凸模难加工问题，介绍了采用冷压成形工艺——立体压制方法。
The principle, structure and key design points of three-point fixing method to special-shaped small punch are introduced, and compared with traditional fixing methods.
通过分析异形截面芯模的特征和数控加工工艺，选择了合适的加工设备、数控系统和截面轮廓曲线的处理方式。
Through analyzing the characteristics of special-section mould of and NC machining processes, selected the proper processing equipment, NC system and treatment methods of the sectional profile curves.
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