变速器齿轮热装工艺仿真及实验研究

发布时间：2018-10-29 14:08

【摘要】：变速器是整个传动系统里除去主减外,最核心、最复杂部件。其中中间轴系是变速器核心部件。它的热装是变速器装配中非常重要的一环,其热装工艺的好坏直接决定了装配质量和整线节拍,最终大大影响到整车性能。因此,本课题对于热装工艺仿真及实验研究有十分重要的工程意义。首先从理论上推导中间轴与齿轮压装许用最大过盈量,以确定热装的必要性,然后确定热装核心参数之一：热装温度范围。再详细介绍比较工程常用两种加热方式：加热箱加热以及电磁感应加热,最后根据自身项目要求,确定了电磁感应加热方式。然后明确变速器中间轴系热装过程压装工艺要求,详细介绍并比较汽车领域变速器装配与测试线常用的压装方法,并根据工艺要求和齿轮内径热扩有限元仿真结果确定的实际工况负载,初选了气动压装方式与气缸型号的同时,也为实际工况负载的确定提供了理论与有限元分析双向指导。并且推导出压装力公式,明确压装力与压装位移、过盈量和外形量之间的理论线性关系。并采用控制变量法,使用ANSYS分别对压装力与压装位移,压装力与过盈量,压装力与外形量关系进行仿真,辅证了理论推导。为不同参数下的压装场合下的压装方式选择,执行机构选型提供理论指导。最后针对实际热装过程中压装不到位问题,使用FLUENT进行轴系热固耦合仿真,分析了问题根源,并加装冰箱线体,解决了压装问题。
[Abstract]:The transmission is the core and most complex part of the whole transmission system except the main subtraction. The intermediate shaft system is the core part of transmission. Its hot loading is a very important link in the assembly of transmission. Its hot charging technology directly determines the assembly quality and the whole line beat, and finally greatly affects the performance of the whole vehicle. Therefore, this topic has very important engineering significance for the hot charging process simulation and experimental research. In order to determine the necessity of hot charging, the maximum allowable interference of intermediate shaft and gear is deduced theoretically, and then one of the core parameters of hot charging is determined: the range of hot charge temperature. Then two kinds of heating methods are introduced in detail: heating box heating and electromagnetic induction heating. Finally, according to the project requirements, the electromagnetic induction heating method is determined. Then the pressing process requirements of the intermediate shaft system of the transmission are defined, and the common pressing methods of the transmission assembly and test line in the automobile field are introduced and compared in detail. According to the technological requirements and the actual load determined by the finite element simulation results of the inner diameter of the gear, the pneumatic pressing mode and the cylinder type are selected, and the bidirectional guidance of the theory and finite element analysis for the determination of the actual working load is also provided. The formula of pressure-loading force is deduced, and the theoretical linear relationship between pressure-loading force and pressure displacement, interference and shape is determined. The control variable method and ANSYS are used to simulate the relationship between the pressure and displacement, the pressure and interference, the pressure and the shape, and the theoretical derivation is given. It provides theoretical guidance for the selection of pressing mode and the selection of actuators under different parameters. Finally, aiming at the problem that pressing is not in place in the actual hot charging process, the FLUENT is used to simulate the thermo-solid coupling of shafting system, and the root cause of the problem is analyzed, and the refrigerator wire body is added to solve the pressing problem.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.212

【相似文献】