With upper bound method and least energy principle, the conditions are established of drawing and breaking workpiece with cross wedge rolling technique to form axial symmetry spare parts.
利用上限原理和最小能量原理，获得了用楔横轧工艺成形阶梯轴类件时杆部拉断的条件。
One of the valid method to reduce the vertical breaking in deep-drawing of 18-8stainless steel is to adopt a die clearance which is less than the plate thickness.
防止18 - 8型不锈钢技深件纵向开裂的有效措施之一是在拉深时采用小于板料厚度的凸凹模间隙。
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