radius die

In the process of exploitation, we use a new idea of "pitch cone radius not modification, reference cone angle modification." and order function of "Program" of Pro/ E system to reach parametrical control of assembles of die.

在开发过程中，利用节锥不变、分锥变位的新思路和Pro/E系统中的Program命令功能达到模具组件的参数化控制。

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The determination of the minimum bending radius in the design of the pipe_bending die was stated. And the structure of the die slot, the form and installation of the shaft core were introduced. The pipe was prevented effectively from deformation.

叙述了弯管模设计中最小弯曲半径的确定，弯管模模槽的结构，芯轴的形式和安装，有效地防止管子变形，并通过实践经验给出了一些模具设计参数。

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NIB: Green roller defect on the small end radius; caused by taper die failure. A sharp protrusion on the small end of the roller.

由于圆锥模具缺陷造成的半成品滚子小端倒角缺陷，滚子小端有尖锐的突出。

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Push bending process and die with variable radius for rectangle tube

矩形管变曲率推弯工艺与模具

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The springback angle increases with the increase of the punch round radius and clearances between the punch and the die while decreases with increase of the blank holder force, sheet thickness, friction coefficient and material hardening exponent.

回弹角随凸模圆角半径和凸凹模间隙的增大而增大，随压边力、板料厚度、摩擦系数和材料硬化指数的增大而减小。

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