T-joint titanium alloy structures are commonly used in aircraft manufacturing,and their laser welding process is relatively mature,but due to the strict requirements of the airplane production,the angular deformation ...T-joint titanium alloy structures are commonly used in aircraft manufacturing,and their laser welding process is relatively mature,but due to the strict requirements of the airplane production,the angular deformation caused by uneven heat input across the sheet is still not negligible,so active control needs to be imposed.In this paper,an active deformation control method based on programmable multi-point flexible support is proposed and validated.In response to the problem that the traditional rigid clamping and pre-stressing are not adapted to the T-structure thin sheet,this study has designed a multi-point flexible support with microcontroller and electric actuators,which can monitor the stress state of the current support position in real time during the welding process and make dynamic adjustment,so that the weld deformation could be effectively reduced in this way.展开更多
为研究新的滚刀刀圈材料,从两种国外刀圈材料中选择一种作为对比材料,对另一种国外刀圈材料的化学成分进行调整,确定了试制刀圈的材料为5Cr5Mo Si V模具钢,开展了试制刀圈冶炼、锻造、热处理工艺研究,分析了5Cr5Mo Si V模具钢热处理后...为研究新的滚刀刀圈材料,从两种国外刀圈材料中选择一种作为对比材料,对另一种国外刀圈材料的化学成分进行调整,确定了试制刀圈的材料为5Cr5Mo Si V模具钢,开展了试制刀圈冶炼、锻造、热处理工艺研究,分析了5Cr5Mo Si V模具钢热处理后的金相组织,进行了试样耐磨性对比试验。结果表明:采用淬火1 060℃和2次500℃回火的热处理工艺,试制刀圈硬度值达到54.7HRC,冲击功AKU达到30J,具有较好的综合力学性能;热处理后的金相组织为保持有马氏体位相的回火索氏体,并且组织中弥散着细小碳化物;在冲击条件下材料断口形貌与拉应力条件下的断口形貌相比,变化不大,保持准解离断裂。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.52275304 and 51975014).
文摘T-joint titanium alloy structures are commonly used in aircraft manufacturing,and their laser welding process is relatively mature,but due to the strict requirements of the airplane production,the angular deformation caused by uneven heat input across the sheet is still not negligible,so active control needs to be imposed.In this paper,an active deformation control method based on programmable multi-point flexible support is proposed and validated.In response to the problem that the traditional rigid clamping and pre-stressing are not adapted to the T-structure thin sheet,this study has designed a multi-point flexible support with microcontroller and electric actuators,which can monitor the stress state of the current support position in real time during the welding process and make dynamic adjustment,so that the weld deformation could be effectively reduced in this way.
文摘为研究新的滚刀刀圈材料,从两种国外刀圈材料中选择一种作为对比材料,对另一种国外刀圈材料的化学成分进行调整,确定了试制刀圈的材料为5Cr5Mo Si V模具钢,开展了试制刀圈冶炼、锻造、热处理工艺研究,分析了5Cr5Mo Si V模具钢热处理后的金相组织,进行了试样耐磨性对比试验。结果表明:采用淬火1 060℃和2次500℃回火的热处理工艺,试制刀圈硬度值达到54.7HRC,冲击功AKU达到30J,具有较好的综合力学性能;热处理后的金相组织为保持有马氏体位相的回火索氏体,并且组织中弥散着细小碳化物;在冲击条件下材料断口形貌与拉应力条件下的断口形貌相比,变化不大,保持准解离断裂。
