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在发动机装配中,合理选用密封胶对各接合面及螺纹进行密封和锁紧是切实可行的。对油底壳、正时齿轮室盖等法兰面,适合涂液态密封胶;对各种工艺孔的碗形塞片,适合涂高粘接强度、低粘度、固化快的厌氧胶;对各种锥管螺纹接头及通孔螺纹,适合涂低粘接强度、较高粘度的厌氧胶。对厌氧胶,要根据密封间隙大小选择粘度,根据拆装需要决定粘接强度。对含熔剂的密封胶,涂布后经凉置才能连接紧固;对不含溶剂的非干性和硅酮类胶剂,则不需要干燥就可装配,这在大量流水生产中尤为重要。使用液态密封胶应按接合面预处理、涂胶、干燥(对含溶剂的胶)、连接紧固和清理等步骤进行。
In the engine assembly, a reasonable choice of sealant on the joints and threads sealing and locking is feasible. On the oil pan, timing gear chamber cover and other flange surface, suitable for coating liquid sealant; for a variety of process holes bowl-shaped plug, suitable for coating high adhesive strength, low viscosity, fast curing anaerobic adhesive; Various tapered pipe thread and through-hole thread, suitable for low adhesive strength, high viscosity anaerobic adhesive. Anaerobic adhesive, according to the choice of sealing gap size of the viscosity, according to disassembly need to determine the bonding strength. For flux-containing sealants, after coating can be connected through the cooling system fastening; for non-solvent and solvent-free silicone glue, you do not need to dry the assembly, which is particularly important in a large number of 流水生产. The use of liquid sealants should be pre-treated joints, glue, dry (with solvent-containing glue), the connection fastening and cleaning steps.