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缸盖是柴油机中结构较为复杂的零件,多用铸铁或铸铝制成。若缸盖出现裂缝或损伤,须修复后才能继续使用。铝制缸盖的焊修难度较大,现将用气焊焊修的方法简介如下。 (1)做一个带半圆形嘴子的铁勺,嘴子外端焊成封闭状,与铁勺相接的下方勺壁上钻一个直径4mm的孔。将砸碎的废活塞放入铁勺内加热至熔化状态,然后把铁勺放在干净的铁板上作倾斜移动,让熔化的铝水经小孔流出,形成一根根焊条。焊条最好随做随用,不宜久放,以免表层氧化而影响焊接质量。 (2)先将缸盖外表面氧化物或污垢锈斑清除干净,再
Cylinder head is a more complex structure of the diesel engine parts, mostly made of cast iron or cast aluminum. If the cylinder head cracks or damage, to be repaired before they continue to use. Aluminum cylinder head welding repair more difficult, now using gas welding repair method is as follows. (1) Make an iron spoon with a semicircular mouth, the outer end of the mouth is welded into a closed shape, and drill a hole with a diameter of 4 mm on the spoon wall below the iron spoon. Place the smashed waste piston into an iron spoon and heat it to a molten state. Then place the iron spoon on a clean iron plate and tilt it so that the molten aluminum flows out through the holes to form a root electrode. Electrode with the best as with the use, should not be a long time to avoid surface oxidation and affect the quality of welding. (2) the first surface of the cylinder head oxide or dirt stains clean, and then