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工程机械轻量化的研究应用对推动工程机械快速发展有重要意义,可有效降低设备质量,提高产品性能,节约资源与能源。对某3t平衡重式内燃叉车外门架进行有限元静力学分析,得知叉车外门架应力主要集中于外门架的立柱腹板和翼缘位置。基于第三强度理论对外门架进行静力学计算,获得设计板厚与材料属性之间的计算公式,选取满足设计要求的Q550高强度结构钢材料进行建模,并对轻量化设计后的模型进行强度校核。结果表明,采用Q550高强度钢材料的外门架设计模型满足工作性能需求,比原叉车外门架减重约12%。
Research and application of lightweight construction machinery to promote the rapid development of construction machinery is of great significance, which can effectively reduce the quality of equipment, improve product performance, save resources and energy. Finite element static analysis of a 3t counterbalanced internal combustion forklift outside mast shows that the stress of the forklift external mast is mainly concentrated on the column webs and flanges of the external mast. Based on the third strength theory, the outer mast is statically calculated to obtain the formula between the design thickness and the material property. The Q550 high-strength structural steel material that meets the design requirements is selected for modeling. The light-weight design model Strength Check. The results show that the outer frame design model of Q550 high strength steel meets the performance requirements and weighs about 12% less than the original outer frame of the forklift.