HETEROGENEOUS JUNCTION STRUCTURE

• Main Authors: HATA TSUNEHISA, OHAMA SHOSUKE, KAWASAKI KENICHI, ASAMI AKIHIKO, IMANISHI TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2019
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; MOTOR VEHICLES; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRAILERS; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To achieve more reductions in the weight of an iron member and frictional agitation junction cost and higher reliability of anti-corrosion than the conventional.SOLUTION: A sub-frame structure 10 is constituted by connecting a frame front part 12 and a frame rear part 14 running along vehicle longitudinal direction with each other. The frame front part 12 has higher strength than the frame rear part 14 and the strength of the sub-frame is partially changed. The frame front part 12 comprises alloy galvanized steel (GA steel sheet) with electrodeposition coating. A rear cross panel 24 of the frame rear part 14 comprises galvanized steel (GI steel sheet) with electrodeposition coating, and a rear cross member 22 of aluminum die cast and a rear cross panel 24 of galvanized steel (GI steel sheet) are integrally joined to each other by frictional agitation junction.SELECTED DRAWING: Figure 2 【課題】従来と比較して、鉄製部材の軽量化と、摩擦攪拌接合コストの低減と、耐食信頼性向上とを達成すること。【解決手段】サブフレーム構造体１０は、車両前後方向に沿ったフレーム前部１２とフレーム後部１４とが連結して構成され、フレーム前部１２は、フレーム後部１４と比較して高い強度を有し、サブフレームの強度が部分的に変えられており、フレーム前部１２は、電着塗装を施した合金化溶融亜鉛めっき鋼板（ＧＡ鋼板）からなり、フレーム後部１４のリヤクロスパネル２４は、電着塗装を施した溶融亜鉛めっき鋼板（ＧＩ鋼板）からなり、アルミダイカストのリヤクロスメンバ２２と、溶融亜鉛めっき鋼板（ＧＩ鋼板）のリヤクロスパネル２４とが摩擦攪拌接合により一体的に接合されている。【選択図】図２