Dynamic Balancing Of Tool Rest Of Composite Crankshaft Lathe And Topological Optimization Of Critical Component

The composite crankshaft lathe has many advantages,It can not only overcome the disadvantages of low speed,efficiency,accuracy of traditional crank turning processing,but also can alleviate pressure of production enterprises in China to introduce expensive foreign numerical control processing technology and equipment It is in accordance with China's national conditions of crankshaft processing.The parallelogram tool rest is the critical component,the pendulum force and torque exist in the working processing will result in processing workpiece phenomenon,and then has a significant effect to the precision.The Rest tool work at the high speed,the stress of key parts such as connecting rod is relatively complex.it will seriously affect the processing precision of the crankshaft If its static and dynamic performance does not meet the job requirements.So it is particularly important to design a simple structure that it has obvious dynamic balancing result and conduct relevant research of key components topology optimization of static and dynamic characteristics to improve the crankshaft machining accuracy.Aiming at the existing dynamic imbalance of crankshaft composite lathe tool rest,put forward a variety of dynamic balanceing,and carries on the simulation application of virtual prototype technology to validate the feasibility of the protocols.then making a better choice of the dynamic balance effect is easy to implement Through complexity,dynamic balance effect and so on scheme comparison.Using 3 d software to design the structure of tool rest.Then the finite element method was applied to conduct statics and dynamics research to guarantee its static and dynamic performance,then make topology optimization under the condition of job requirements to reduce the weight of the whole head,eventually get rest design scheme.The main contents are as follows:1.Validating dynamic unbalance of the tool rest,Get the unbalanced force and torque curve.According to the principle of planar linkage of dynamic balance.proposing a variety of dynamic balance scheme.Using the Adams simulation dynamic balance effect of each scheme.Analysis the advantages and disadvantages of each scheme,compare them from multiple aspects such as the structure complexity,dynamic balance effect and its implement,the final choice is to add two counter weight;2.By using three-dimensional software to the preliminary design of dynamic equilibrium solution components,including crank,connecting rod,counter weight,and the design of the crank and counter weight adjustment way.Using Adams to the simulation of working process of the tool rest,validate dynamic balance the effect,and optimize the quality of counter weight to minimize the residual inertia load that result from the simplification of the model;3.making statics analysis of connecting rod who is Key components of tool rest under different conditions to achieve the stress strain contours of the connecting rod.Then conducting the modal analysis,get the modal vibration mode.Inspecting whether the dynamic and static characteristics can meet the requirements;4.Conducting the topology optimization Based on static and dynamic performance requirements of connecting rod to get the optimal topology.Verifing whether the dynamic and static characteristics of the new schem still meets the requirement,and to get the optimal connecting rod design.