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牛头刨因切削速度不均匀而影响零件的加工精度、粗糙度和刀具寿命,同时使电机功率增大。本文论证了可调机构优化设计应该特殊考虑的问题和处理方法;考虑在滑枕变行程(曲柄长度可调)条件下,以寻求最均匀的切削速度为优化准则,建立牛头刨摆动导杆机构多目标组合优化设计的数学模型;最后论述了寻优计算应注意的问题。牛头刨主传动机构一般采用如图所示的摆动导杆机构。为了提高零件加工精度,降低表面粗糙程度和减少刀具磨损,要求刨削速度尽量均匀。此外对机构急回特性、传力性质和反向冲击等也有一定要求。本文在导杆机构运动分析基础上,考虑到滑枕行程可调这一因素,以最均匀的刨削速度为优化准则,建立了导杆机构计算机辅助多目标组合优化设计的数学模型。将该数学模型写入非线性规划计算程序,即可用计算机算得使机构具有均匀刨削速度的最优设计参数。
Taitou due to uneven cutting speed affect the parts machining accuracy, roughness and tool life, while increasing the motor power. This paper demonstrates the problems and solutions that should be specially considered in the optimization design of adjustable mechanism. Considering that the optimal cutting speed is the most uniform cutting speed under the condition of adjustable crankshaft length (crank length adjustable) Multi-objective combinatorial optimization design of the mathematical model; Finally, the optimization calculation should be noted that the problem. Taupe main drive mechanism is generally used as shown in the swing guide mechanism. In order to improve the accuracy of parts processing, reduce the surface roughness and reduce tool wear, require planing speed as uniform as possible. In addition, there are certain requirements on the quick response characteristics of the organization, the nature of the force transmission and the reverse impact. In this paper, based on the analysis of the movement of the guide bar mechanism, taking into account the adjustable stroke of the ram and taking the most uniform planing speed as the optimization criterion, a mathematic model of computer aided multi-objective combinational optimization design of the guide bar mechanism is established. By writing the mathematical model into the nonlinear programming calculation program, the optimal design parameters that make the machine have a uniform planing speed can be calculated by the computer.