管材挤压工艺分析及实验研究

Analysis and Experiment Study on Tube Extrusion

对管材挤压成形进行了工艺分析及实验研究。确定了镁合金、70 75铝合金、高温合金等几种材料管材挤压成形工艺参数 ,分析了管材挤压成形时变形力的变化规律。研究结果表明 ,管材挤压成形时必须严格控制坯料温度、模具预热温度、润滑方式、挤压速度、挤压比等工艺技术参数。以上工艺参数对挤压力均有不同程度的影响。

Technology of tube extrusion has been analysed and the technological parameters of tube extrusion of Mg alloy(MB2),Al alloy(7075Al) and Superalloy (In718), such as slug temperature, tools temperature, choice of lubricant, ratio of extrusion, and extrusion speed, have been determined by experiment in this paper. The extrusion force and influence factors have also been studied. From the results of experiment, it is found that extrusion force has relation to deformation temperature, tool temperature, ratio of extrusion, lubricant and deformation velocity.