【摘要】 作为皮革切割机的核心支撑部件，机架轻量化能够直接降低制造成本、提高产品经济性。对现有的框架式皮革切割机机架开展轻量化研究。分析机架静态性能，基于变密度法对整体开展了直接拓扑优化，更换顶部矩形管型号并开矩形孔，针对优化结果不清晰的机架底部，将其填充后进行全局拓扑优化，重新确定结构布局，然后采用多项式回归响应面法对矩形孔尺寸和结构位置尺寸迭代计算进行最终参数寻优，实现机架双重轻量化。结果表明：改进后的机架仍符合设计要求，质量减少约10.5%,降低其制造成本，可为框架式机架轻量化设计提供参考。更多还原

【Abstract】 As the core supporting component of the leather cutting machine, the lightweight frame can directly reduce manufacturing costs and improve product economy. This study conducts a lightweight study on the existing frame-type leather cutting machine frame. Analyzing the static performance of the rack, direct topology optimization of the whole was carried out based on the variable density method. The top rectangular tube model was changed and rectangular holes were opened. The bottom of the rack where the optimization results were unclear was filled and global topology optimization was performed to re-determine the structure. Layout, and then use the polynomial regression response surface method to iteratively calculate the rectangular hole size and structural position size for final parameter optimization to achieve double lightweighting of the rack. The results show that the improved rack still meets the design requirements, and its mass is reduced by about 10.5%, which reduces its manufacturing cost and can provide a reference for the lightweight design of frame-type racks.更多还原