罗国良，李连升，宋海洋，李明磊

潍柴动力股份有限公司，山东 潍坊 261000

摘要：采用有限元分析、离散傅里叶变换分析定形珩磨工装和气缸盖分别装配到某中型柴油机气缸体上产生的缸孔变形，采用相关系数法分析两者的一致性和差异性，对气缸体样件进行缸孔变形测试和台架耐久试验验证。分析和试验结果表明:两者的一致性系数在1±5%以内，系统偏差约为0，相关系数大于0.95，表明珩磨工装的刚度十分接近气缸盖的刚度，定形珩磨工艺可以应用于气缸体。定形珩磨技术可以大幅减少缸孔变形，降低柴油机碳排放和污染物排放。

关键词：柴油机；气缸体；定形珩磨；缸孔变形

Abstract：Finite element analysis and discrete Fourier transform are used to analyze the cylinder bore deformation caused by the shaping honing tooling and the cylinder head assembly on the cylinder block of a medium-duty diesel engine, and the correlation coefficient method is used to analyze the consistency and difference between them. The cylinder bore deformation test and bench durability test are carried out on the cylinder block samples. The analysis and test results show that the consistency coefficient of the two is less than 1 ± 5%, the system deviation is about 0, and the correlation coefficient is greater than 0.95, indicating that the rigidity of the honing tooling is very close to that of the cylinder head, which can be applied to the shaping honing of the cylinder block. The shaping honing technology can greatly reduce the cylinder hole deformation and reduce the carbon emission and pollutant emission level of diesel engine.

Keywords:diesel engine；crankcase；form honing; bore deformation