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通过理论分析和计算确定了动车组空调通风口部件与铝合金车体胶接用胶粘剂的强度指标。介绍了胶粘剂的选择及胶接结构的设计原则,考查了搭接长度、搭接宽度、胶层厚度和被粘接材料厚度等对胶接件粘接强度的影响。结果表明:车体与空调通风口部件的胶接接头选择受剪切应力作用的搭接接头较适宜,并且搭接接头的承载能力随搭接长度或宽度增加呈先快速上升后趋于稳定态势;当搭接长度为10 mm、胶层厚度为6 mm、铝合金板厚度为5 mm且常温湿固化型单组分PU(聚氨酯)胶粘剂的剪切强度超过0.23 MPa时,搭接接头的承载能力相对最大。
Through the theoretical analysis and calculation, the strength index of the components of air conditioner vents and the aluminum alloy body adhesive for the EMU is determined. The selection of adhesive and the design principle of adhesive bonding structure were introduced. The effects of lap length, lap width, thickness of adhesive layer and the thickness of adhesive material on the adhesive strength were investigated. The results show that the choice of lap joints which are subjected to shear stress is more suitable for the joint of car body and air conditioner vent, and the load-bearing capacity of lap joint increases quickly and then tends to be steady with the increase of lap length or width ; When the lap length is 10 mm, the thickness of the adhesive layer is 6 mm, the thickness of the aluminum alloy plate is 5 mm and the shear strength of the one-component PU (polyurethane) adhesive at room temperature and humidity curing exceeds 0.23 MPa, the lap joint bearing Relatively maximum capacity.