Topology Optimization Design For Cutter-head Of Biaxial Shredding Machine Of Automobile

Follow the increasing of the number of scraped car, disposing the scraped car becomes a problem which urgent to solve. Shredding machine mainly used in the cr ushing stage. Currently, most of shred-master is heavy, low efficiency and often app earance fatigue phenomena. The cutter-head as a key part of shred-master, its struct ure decided the efficiency and lifetime of shred-maser directly. So it is effectively t o solve these problems by lightweight cutter-head.In this thesis, as the cutter-head of shred-master as the object, research on the topology optimization method which suit for large-scale complex part and use this method to lightweight design the cutter-head of shred-master. lightweight design is mainly depend on the topology optimization method, at present these methods are u sually be used, they are Solid isotropic micro-structures with penalization(SIMP) and Bi-Directional Evolutionary Structural Optimization(BESO), among them, SIMP is e asy to implementation by program, and it has a high computation, but the results of this topology optimization method can not provide ground structure with maximum rigidity, BESO method can obtain a topology ground structure with maximum rigid ity and it's geometry size can be calculated, but for complex structure calculation th is kind of method efficiency is low, the quality of the topology optimization results depend on the number, size and quality of elements. So it is efficient for getting t he topology structure of cutter-head, if use the two algorithms alone, and in this the sis, we will use SIMP to find a mathematical relationship between the volume perce ntage and compliance, through which get the constraint equation of volume percenta ge and add these constraint equations in BESO method, so as to improve the efficie ncy and quality.In this thesis, carrying the mechanical design on biaxial shred-master, using AB AQUS software to dynamic analysis the process of shredding, and use the results of dynamic analysis adding the load on the cutter-head, so as to get the topology opti mization model of the cutter-head, then using the improved topology optimization m ethod to topology optimization the cutter-head, get a reasonable structure of cutter-h ead. Finally a mechanics experiment is carried to validate the rationality of the struc ture. the process of optimizing cutter-head is written as a Python program. Through 3D-DIC experiment can get that the strain of cutter-head with a hole is minimum, a nd it is also the most stable structure.As the results in this thesis is that, adopting the new cutter-head structure for s hredding machine the spindle stress state is improved greatly, the maximum von Mi ses stress is less 50.3MPa than the original one. Through changing the configuration of the cutter-head, we can found that the spiral configuration shredding machine cr ushing effect is better than straight line, the von Mises stress of the plate is 3.4 ti mes that of the line configuration.