【作者】 周鹏举；

【导师】 林超；

【作者基本信息】 重庆大学 ， 机械设计及理论， 2006， 硕士

【摘要】 高速干式滚齿加工是近年来发展的一种全新高效率的绿色齿轮制造技术,它克服了传统齿轮加工生产效率低下、生产成本高、污染环境及危害工人身体健康等缺点,正成为各国研究的热点。在高速干式滚齿研究领域,切削温度的研究是至关重要的,它与切削机理密切相关。在断续切削的高速干式滚齿加工过程中,刀具受到周期性的热冲击,使滚刀齿产生热裂纹导致破损;此外刀齿切削过程中的粘着、扩散和氧化等现象都与切削温度有直接关系;切削温度还直接影响积屑瘤的形成、工件加工精度及刀具使用寿命等。论文基于传热学理论、金属切削原理及滚齿加工原理等理论,推导了高速干式滚齿、高速干式飞刀铣齿的多因素切削温度场计算公式及平均切削温度计算公式,建立了高速干式滚齿、高速干式飞刀铣齿的切削温度数学模型;采用ANSYS软件对高速干式滚齿的滚刀切削温度场及高速干式飞刀铣齿的飞刀切削温度场进行了仿真模拟;采用VB6.0、MathCAD2000等软件系统对高速干式飞刀铣齿切削温度理论计算、高速干式滚齿切削温度理论计算、滚刀参数化设计及高速干式飞刀铣齿切削温度实验测量进行程序设计;通过高速干式飞刀铣齿来模拟高速干式滚齿实验,设计了切削温度的正交实验测量方案,利用自然热电偶测量飞刀铣齿的平均切削温度;结合理论解析计算、ANSYS有限元分析、切削温度实验测量及切削温度能量守恒实验数据处理四种方法,分别获得了平均切削温度的经验公式,得到了高速干式飞刀铣齿的平均切削温度随切削速度、进给量、切削深度及其它切削因素的变化规律,通过切削温度理论解析还获得了高速干式滚齿的平均切削温度及滚刀齿上任意参考点的瞬时切削温度随上述切削因素的变化规律,将有限元仿真结果、实验测量结果及理论解析结果进行了对比分析,验证了切削温度模型和计算方法的正确性;通过综合分析最后探讨高速干式滚齿的切削机理,包括高速干式滚齿切屑的形成机理、工件材料受热聚积的软化效应、滚刀齿受热的随散效应、高速干式滚齿的切削温度控制策略及刀具的磨损机理。通过本文的研究能够为高速干式滚齿加工技术提供理论支持及高速干式滚齿切削温度的实验测量技术、高速干式滚齿加工工艺的制定、切削因素的优选提供一个参考依据。更多还原

【Abstract】 The technology of high-speed dry hobbing machining is one of bran-new and high machining efficiency technology of gear machining, which develops in recent years. It can conquer many disadvantages of the traditional way of gear machining, such as low processing efficiency, high operating costs, polluting environment and harming the workers’health and so on. It is becoming a hotspot for many countries.In the researching field of high-speed dry hobbing machining, the cutting temperature is most important, it most closely related to cutting mechanism. In the course of discontinuous cutting of high-speed dry hobbing machining, the teeth of hob are got heat strike periodically. Results in the teeth flawed and damaged. Furthermore, the phenomenon of adhereance, pervasion and oxygenation of hob teeth are also in connection with cutting temperature in the cutting course. Cutting temperature also affects the form of built-up edge, machining precision of workpiece, cutter life-span and so on.This paper is based on Heat Transfer Theory, Metal Cutting Theory and Hobbing Machining Principle and other theories. It deduces the multi-factor formulas of cutting temperature field and the formulas of average cutting temperature in high-speed dry hobbing machining and high-speed dry flying cutter cutting, sets up a cutting temperature model of high-speed dry hobbing machining and a cutting temperature model of high-speed dry flying cutter cutting. It applies ANSYS to silmulate the cutting temperature field of hob in high-speed dry hobbing machining. It also applies ANSYS to silmulate the cutting temperature field of flying cutter in high-speed dry flying cutter cutting. It applies VB6.0,MathCAD2000 to write programs of cutting temperature calculation of high-speed dry flying cutter cutting, cutting temperature calculation of high-speed dry hobbing machining, parametric design of hob, cutting temperature testing of high-speed dry flying cutter cutting experiment. Then it utilizes the experiment of high-speed dry flying cutter cutting to simulate high-speed dry hobbing machining, design the orthogonal method of cutting temperature experiment testing, utilizes the nature thermocouple to test the average cutting temperature of flying cutter cutting. Lastly, gathers the methods of analytic calculation, finite element analysis by ANSYS, cutting temperature experiment testing and conversation of energy, acquires the experiential formulas of average cutting temperature, it can analyze the更多还原