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１ 存在的问题我公司生产的装载机前机架结构简图如图１所示。以往采用一次上胎组焊完成，填块和动臂液压缸支承座焊后变形较大。填块变形影响了前机架上三组加工孔的同轴度及其与铰接孔的垂直度，而且造成四个填块受力不均。同轴度的偏差使得动臂、拉杆及铲斗在举升和下降过?
1 problems I produced the front loader rack structure diagram shown in Figure 1. In the past using a welding on the tire is completed, fill block and boom cylinder seat welding deformation after welding. The deformation of the block affected the concentricity of the three sets of machining holes on the front frame and the perpendicularity between the blocks and the hinge holes, and caused the uneven force of the four blocks. Concentricity deviation makes the boom, rod and bucket lifting and lowering too?