1. the purpose and significance of theresearch
1.1 purpose and significance
in recent years, the shortage of resources and environmentaldegradation in the world has become increasingly fierce. the automobileindustry, which is a pillar industry of the global manufacturing industry, isfacing unprecedented pressure on energy conservation and emission reduction.the problem of reducing automobile fuel consumption and reducing emissions isurgently needed to be solved. lightweight design conforms to the requirementsof the times and has become a research hotspot in the current automotive field.there are two main ways to achieve lightweight: lightweight structure and lightweight materials.  at present, the overallsteel body structure optimization can achieve up to 7% weight loss, basicallyreaching the weight reduction limit, using lightweight high-strength aluminumalloy instead of steel body weight loss as high as 30% to 50%, therefore, itcan be considered that the degree of the lightweight material is significantlyhigher than the lightweight structure. 
2. the basic content, objectives, proposed technicalsolutions and measures
2.1 main research content
experimentally study on the influence of the connection processparameters (discharge parameters) and the workpiece structure size (target diediameter) on the connection performance of the dissimilar aluminum/aluminumjoints of the car body when the dissimilar aluminum alloy material is connectedby the vaporizing foil actuator welding method.
(1) weeks 19-20 of the 7th semester: determine the graduation designtopic, improve the graduation design task book (related parameters), andcollect data on campus.
(2) week 1 of the 8th semester: planconception, literature search, completion of the opening report.
4. 参考文献（12篇以上）4. references
yin chengkai. research on 3a21 aluminum alloy and 20# steeltube-tube magnetic pulse welding process [d]. master of engineering, harbininstitute of technology, 2010.
 li yongbing, li yating, lou ming, lin zhongqin. lightweight ofcar body and its challenge to connection technology[j]. journal of mechanicalengineering, 2012, 48(9): 44-54.
 zhang linyang. all-aluminum and steel-aluminum hybrid body lightweightconnection technology [j]. automotive technology and materials, 2018 (7): 1-8,14.