真空搅拌摩擦焊机的研制  

Development of vacuum friction stir welding machine

作　　者：苏海龙[1] 骆宗安[1] 谢广明[1] 王浩[1] Su Hailong;Luo Zong’an;Xie Guangming;Wang Hao(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学,轧制技术及连轧自动化国家重点实验室,沈阳110819

出　　处：《焊接》2022年第10期37-42,共6页Welding & Joining

基　　金：国家自然科学基金资助项目(51774085)。

摘　　要：为了获得性能优异的轻合金(铝、镁合金等)复合板,研制了一台真空搅拌摩擦焊机,有效解决了由于铝镁合金电子束焊接性能差而无法真空制坯的问题。详述了该设备的结构以及工作原理,其相应的组成系统包括机械系统、控制系统、真空系统、冷却系统、气动系统。通过PLC控制真空系统、冷却系统、气动系统来完成抽真空过程,通过CNC控制的伺服驱动系统实现平面以及曲面的焊接,并使用该设备对7050铝合金进行了焊接试验。结果表明,转速为600r/min,焊接速度为100mm/min时,焊接接头力学性能以及表面平整度最佳。该设备的研制为深入研究轻合金复合板制备工艺、界面微观组织演变及结合机理提供了必要的工具和手段。In order to obtain light alloy(aluminum,magnesium alloy,etc.)clad plates with excellent properties,the vacuum friction stir welding machine was developed,which effectively solved the problem of vacuum billet making caused by the poor electron beam welding performance of the light alloy.The structure and working principle of the machine were described in detail.The corresponding composition systems included mechanical system,control system,vacuum system,cooling system and pneumatic system.The vacuum system,cooling system and pneumatic system were controlled by PLC to complete the vacuum pumping process.The plane and curved surface welding was realized by CNC controlled servo drive system.The welding test of 7050 aluminum alloy was carried out with the machine.The results showed that the mechanical properties and surface flatness of the welded joint were the best when the rotating speed was 600 r/min and the welding speed was 100 mm/min.The development of this machine provides a necessary tool and means for investigating the preparation process,interfacial microstructure evolution,and bonding mechanism of light alloy clad plates.

关 键 词：真空 搅拌摩擦焊 数字控制器 伺服控制 复合板 

分 类 号：TG439.9[金属学及工艺—焊接]