学习大庆修旧十二字:焊、补、喷、镀,铆、镶、配、改、校、涨、缩、粘,可使大部分旧件得到修复。焊在农机修理中,除电焊、气焊外,还有下列几种:1.加热减应铸铁冷焊铸铁壳体焊修易产生白口和裂纹,因此过去多用热焊,工效低、劳动强度大。黑龙江安达县农机修造厂用氧炔焰加热减应防止裂纹,用高硅焊条防止白口化,有效地解决了铸铁冷焊 Learning Daqing repair old twelve: welding, fill, spray, plating, riveting, setting, distribution, change, school, up, shrink, sticky, most of the old parts can be repaired. Welding in the farm machinery repair, in addition to welding, gas welding, there are the following: 1 heating cast iron cold welding cast iron shell welding easy to produce white and crack, so in the past with more hot welding, low efficiency, labor-intensive . Anda County, Heilongjiang Agricultural Machinery repair plant with oxygen heating flame should reduce the prevention of cracking, with high-silicon electrode to prevent the white, effectively solve the cold welding of cast iron