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铝制气缸盖的焊补在汽车发动机中,气缸盖冷却水孔周围的腐蚀是比较突出的缺陷,有的气缸盖的全部冷却水孔都已腐蚀,缸盖壁厚仅有0.4毫米。对这些废旧汽缸盖,我们采用了全部预热或局部预热的方法进行焊接修复;当腐蚀部位多时,应使用全部预热法。焊前准备用小凿把水孔周围的腐蚀部份铲除,然后放入炉中预热(专用预热炉是一只比气缸盖形状略大一些的炉子,外壁用薄铁板制成,里面放木炭)。
Aluminum cylinder head welding repair In the car engine, cylinder head cooling water hole corrosion is more prominent defects, and some of the cylinder head cooling holes have all corrosion, cylinder wall thickness of only 0.4 mm. For these discarded cylinder heads, we use all the methods of preheating or partial preheating for welding repairs; when the corrosion sites are long, the full preheating method should be used. Pre-welding with a small chisel to erode the corrosion around the water hole, and then placed in the furnace preheating (special preheating furnace is a slightly larger than the shape of the cylinder head stove, the outer wall made of thin iron inside Put charcoal).