原竹段去内节去黄组合刀具结构设计及性能仿真

Design and simulation of a combined cutting tool for inner section and tabaxir cutting from the natural bamboo section

针对实际生产中竹材加工利用率低的问题,提出了一种原竹段无裂纹展开方法。在对竹材特征参数分析的基础上,就该方法中原竹段筒去内节去黄工序设计了一套可在一次走刀过程中同时实现去内节去黄的组合刀具。分析了组合刀具的切削原理及去黄刀片在稳定切削时的受力及运动状态,得到了最大工况下刀片的受力情况。利用Ansys Workbench对最大工况下刀片的静力学特性进行了分析,验证了刀片的强度,得到了刀片易失效位置,为后续刀片结构优化设计提供了依据。试生产表明,设计的原竹段筒去内节去黄组合刀具具有良好的切削性能,去内节去黄效果好,并且能够满足工业化生产效率的要求。

In order to improve the bamboo utilization ratio in practical production process, a flattening method of natural bamboo section without cracks was proposed in this study. Based on the analysis of specific characteristics of bamboo, a set of combined cutting tool was designed to realize the inner section and tabaxir cutting from the natural bamboo section simultaneously within one cutting process. Subsequently, the cutting principle of the combined cutting tool was established and the forces on the blade of the tool generated by bamboo under the maximum operating condition were obtained based on the force and motion analysis during stable cutting process. Then, a statics simulation for the blade under the maximum operating condition which verified the strength of the blade was analyzed with Ansys Workbench. Simulation results showed that the strength of blade completely met the requirements of design, and confirmed the vulnerable positions, which provided a basis for the optimum design of the blade structure. Finally, trial production on the natural bamboo section by using the combined cutting tool was conducted, and then the follow-up processes of natural bamboo section were carried out and the flattened natural bamboo without cracks was obtained. The result showed that the designed tool had good cutting performance as well as a fine effect on inner section and tabaxir cutting from natural bamboo section in feeding process simultaneously, which could meet the efficiency requirements of industrial production.