目的 在内盒成型机上完成一种折边动作，使某种特定纸盒的内盒围条与面纸能够精准贴合。 方法 通过研究连杆机构式折边装置的运动特点，根据特点分析优化设计的方法，以预期轨迹和实际轨迹之间均方根作为优化的目标函数，运用Matlab搜索在限定条件下的最优尺寸。结果 在Adams中建立相应模型进行运动仿真，得到仿真连杆运动轨迹曲线。最后通过将实际需要的设计轨迹和虚拟仿真的轨迹进行对比，发现虚拟轨迹曲线与设计的曲线最大误差为0.36 mm。结论 符合实际生产中对面纸折边的实际需要，验证了优化设计结果的正确性，对纸盒成型行业提供了一定的参考性。

The work aims to complete an edge folding action on the inner box forming machine, to fit the inner box strip of certain carton to the surface paper accurately. Through the study on motion characteristics of the edge folding device with connecting rod mechanism, the designed method was analyzed and optimized. The root mean square between the expected trajectory and the actual trajectory was taken as the objective function of the optimization, and the optimal size under the limited conditions was searched by the Matlab. The corresponding model was established in the Adams to simulate the motion trajectory curve of the simulated connecting rod. Finally, through the comparison between the actual design trajectory and the virtual simulation trajectory, it was found that the maximum error between the virtual trajectory curve and the designed curve was 0.36 mm. The work is in line with the actual needs of paper folding in actual production, verifies the correctness of the optimization design results, and provides a certain reference for the carton forming industry.