锻压技术

铝镁合金板热渐进成形工艺的研究

英文标题：Research on technique of heat-incremental forming for Al-Mg alloy

作者：张国新

单位：无锡科技职业学院

关键词：铝镁合金热渐进成形电加热润滑

分类号：

出版年,卷(期):页码：2015,40(10):34-38

摘要：

为了实现铝镁合金板料单点渐进成形，根据铝镁合金板料成形特性，提出一种热渐进成形工艺方案。借助金属板料数控柔性快速成形机进行渐进成形，利用电热板装置加热，采用石墨与MoS2复合润滑剂进行润滑，对7075铝镁合金材料热渐进成形进行工艺研究与理论分析。结果表明：1.5 mm厚的7075铝镁合金板料加热温度控制在200~250 ℃范围，进给速度设置在1000~2000 mm·min-1范围，主轴转速设置在3000~4000 r·min-1范围；在陡峭区域采用大步长进给成形，在平坦区域采用小步长进给成形；在保证材料充分塑性成形条件下，尽量采用较大工具头半径，可以实现铝镁合金板料热渐进成形。

In order to realize the single-point incremental forming of Al-Mg alloy sheet, a heat-incremental forming technique based on the forming characteristics of Al-Mg alloy was proposed. The incremental forming was conducted by a sheet-metal NC flexible fast-forming machine, and then the technique study and the theoretical analysis were carried out on the thermal incremental forming technology of alloy 7075，which was heated by electric heating plate equipment and lubricated by graphite and MoS2 composite lubricating agent. Further, the results show that the heat-incremental forming of alloy 7075 sheet with 1.5 mm thickness can be realized under the conditions of the heating temperature 200-250 ℃, the feed rate 1000-2000 mm·min-1, the spindle speed 3000-4000 r·min-1, the large step feed forming at sharp zone and small step feed forming at smooth zone, and the tool size is selected to ensure the full plastic forming of the material.

基金项目：

江苏省“青蓝工程”学术带头人人才基金（苏教师〔2014〕1号）

张国新(1971-)，男，硕士，教授，高级工程师

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