液压油缸缸筒缸底组焊后内径变形研究

在液压油缸生产中,缸筒和缸底组焊后,焊接热影响区内的缸筒内径尺寸会发生较大幅度的变化。通过对30CrMnSi材料φ420 mm缸径液压油缸缸底端缸筒内径组焊后尺寸情况进行统计分析,确定了该油缸缸筒和缸底组焊后缸底端缸筒内径尺寸变化规律。通过改进加工工艺将缸底端缸筒内径组焊后尺寸变化量控制在合理范围内,消除了组焊后缸底端缸筒内径尺寸超差现象,提高了液压油缸产品的质量。

Research on Inner Diameter Deformation of Hydraulic Cylinder After Cylinder and Bottom Assembly Welding

In the production of hydraulic cylinder, the inner diameter of cylinder in the heat affected zone will change greatly after the cylinder and bottom were welded. Based on the statistical analysis of 30CrMnSi material φ420 mm cylinder bore hydraulic cylinder bottom cylinder bore after inner diameter assembly welding, the rule of inner diameter change of the cylinder bore and bottom end cylinder bore after the bottom assembly welding was determined. By improving the processing technology, the dimension change of the cylinder bottom end inner diameter after assembly welding is controlled in a reasonable range, which eliminates the over-tolerance of the cylinder bottom diameter after assembly welding and improves the quality of the hydraulic cylinder products.