轿车车门玻璃升降阻力与车门制造偏差的关系研究

发布时间：2018-03-14 00:01

本文选题：车门玻璃升降系统　切入点：升降阻力　出处：《江西理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：在轿车车门组成系统中,车门玻璃升降系统是其重要的部分之一,为汽车的密闭性与安全性提供一定的保障,然而轿车车门玻璃升降器系统的故障率相对较高,严重影响汽车的整体品质。其主要表现为升降过程中玻璃的卡滞;玻璃在X方向倾斜升降,与导槽密封条底部接触;升降过程的不平稳,严重时会产生较为尖锐的噪声。由于升降过程中主要为玻璃与密封条的接触,其产生的问题的主要原因:装配偏差过大而引起的导致玻璃与密封条的过度接触,进而产生较大升降阻力。针对这些问题,对实际装配过程中产生的偏差及其产生的机理进行分析,并在此基础上,采用有限软件对密封条的压缩特性进行有限仿真分析,同时建立尺寸偏差与升降阻力的数学模型,运用MATLAB软件对其进行求解分析,得到玻璃导槽、内外门板等不同装配偏差下升降阻力的变化曲线,并对其影响进行研究。本文旨在对车门玻璃升降系统各部件的偏差及装配偏差的设计提供依据,提高玻璃升降系统的运行的稳定性及其寿命。本论文的主要研究内容如下:(1)对车门玻璃的受力状况进行分析,采用有限元的方法构建玻璃受力的数学模型,可知腰部水切密封条与导槽密封条的摩擦力是玻璃上升的主要阻力,二者的装配偏差对其影响较大。同时采用有限元软件对导槽密封条和腰部水切密封条的压缩特性进行研究分析。在此基础上,运用MATLAB对数学模型进行求解,得到玻璃上升过程中受到的力与力矩的变化特性。(2)从工艺与玻璃装配过程的角度对玻璃导槽的偏差形成机理进行分析,得到导槽装配偏差的组成及其相关的影响因素。采用有限元与蒙特卡洛模拟公差的的方法,对导槽、玻璃及导槽密封条三者的装配尺寸链进行分析,得到相关尺寸与升降阻力的关系,同时对该尺寸链的公差进行重新设计。导槽在X、Y方向的装配偏差对升降阻力的影响进行研究,在X方向,玻璃与导槽密封条底部非接触,在装配时保持2mm的尺寸可以提高装配成功率,同时保证玻璃可以稳定上升;在Y方向,得到偏移角β与偏移点φp对升降阻力的变化曲线。(3)从工艺的角度对玻璃与内外板之间的偏差形成机理进行分析,得到装配偏差的组成及其相关的影响因素。采用有限元的方法对不同封闭环下的玻璃与水切密封条的尺寸链与升降阻力构建的数学模型进行求解,得到尺寸链与升降阻力特性的关系曲线,并对实际偏差装配过程中升降阻力的变化进行比较分析,结果表明:采用内间距作为封闭环与外间距作为封闭环的方法时,装配偏差在一定范围内,采用前者需要严格控制质量,摩擦阻力较小,效果较好,摩擦阻力因偏差的变化而引起的波动范围较小,相对于前者,后者可以采用比较宽松的偏差,降低质量要求,对摩擦阻力有一定的波动。(4)采用玻璃升降器专用实时测试设备对实车进行实验分析,对车的前后门在Y方向的偏差进行实车测试,得到不同偏差与升降阻力的关系曲线,结果表明:右前门对于面差变化不敏感,而右后门随着面差增大(即车门外凸),升力减小。
[Abstract]:In the car door system, door glass lifter is one of the important part, provide some protection for the car tightness and safety, but the car door glass lifter system failure rate is relatively high, seriously affect the overall quality of the car. The main performance for the card in the lifting process of glass; glass in the X direction of tilt and lifting, seal the bottom contact; the lifting process of instability, which would cause a sharp noise. Because the main glass sealing strip and contact the lifting process, the main causes of the problem: the assembly deviation caused by excessive lead to excessive contact glass and a sealing strip then, have a greater lifting resistance. To solve these problems, the mechanism of deviation in actual assembly process and its analysis, and on this basis, using the finite software of the seal The compression characteristics of CO simulation analysis, and establish the mathematical model of size deviation and lifting resistance, and solved with MATLAB software to carry on the analysis, to obtain the glass guide groove, inside and outside the door, lifting resistance curves of different assembly deviation, and its influence on the research. The purpose of this paper is to provide the basis for the design and assembly of various components of deviation deviation the door glass lifting system, improve the stability of the glass lifting system of operation and service life. The main research contents of this thesis are as follows: (1) on the stress status of the door glass is analyzed, using finite element method to build mathematical model of glass stress, the water cut waist seal and guide friction seal tank is the main resistance of glass increases, the assembly deviation of the two great influence on it. At the same time by using the finite element software of water seal and waist guide strip compression seal cutting. Studied in this paper. On this basis, using MATLAB to solve the mathematical model, get the characteristics of force and moment by the glass rising process. (2) the deviation of guide groove on glass and glass from the process of the assembly process of formation mechanism analysis, obtained factors guide the assembly deviation and its impact by using the finite element method. With Monte Carlo simulation of tolerance to guide the assembly dimension chain glass and seal three through the analysis of the relationship between size and the lifting resistance, while the dimension chain tolerance redesign. Guide in X, to study the effects of Y assembly. The direction of lifting resistance, in the X direction, the glass and the seal at the bottom of non-contact, keep the size of the 2mm in the assembly can improve the success rate of assembly, while ensuring stable glass can be increased; in the Y direction, partial The change curve of the lifting resistance shift angle and offset point beta Phi P. (3) the deviation between the glass and the inner and outer plate formation mechanism is analyzed from the angle of technology factors get the assembly deviation and its impact. The mathematical model is solved by using the finite element method with a glass of water on the sealing ring under different cut size chain and lifting resistance seal construction, get the relation curve of dimension chain and lift drag characteristics, analysis and comparison of changes of resistance in the assembly process of the actual deviation results showed that: the inner ring and the outer space as close spacing as a method of closed loop, assembling deviation in a certain range. The former requires strict quality control, good effect, friction is low, the narrow range of friction due to the deviation caused by changes compared with the former, the latter can be used to compare loose deviation, Reduce the quality requirements, have certain fluctuations on the frictional resistance. (4) using glass lifter special real-time test equipment experimental analysis of vehicle, real vehicle test on the car front door in the Y direction deviation, relation curves of different deviation and lifting resistance, the results showed that: the right front door for the face not sensitive to changes, while the right rear door with surface difference increases (i.e., the lift car door convex) decreases.

【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.834

【参考文献】