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介绍扩径推弯法成形原理以及影响弯头成形尺寸和形状的重要扩径推弯技术参数。技术参数的设定包括成形模羊角芯头的设计、芯头材料选择、感应加热圈的设计、扩径弯头温度和温度沿芯头的分布、扩径推弯速度和成品尺寸控制等。不同材质弯头由于物理特性和不同温度下的拉伸性能存在差异,可根据管坯材料特性,选择不同加工工艺参数,以保证弯头的形状、尺寸精度。
Introduce the principle of forming the diameter and the method of forming the elbow, and the important parameters of the diameter and the diameter of the elbow that affect the forming size and shape of the elbow. The setting of technical parameters includes the design of the core, the selection of the core material, the design of the induction heating ring, the distribution of the temperature and temperature of the expansion elbow along the core head, the expansion and contraction speed and the finished product size control. Different material elbow due to physical properties and tensile properties at different temperatures are different, according to the characteristics of the material tube, choose different processing parameters to ensure the elbow shape, dimensional accuracy.