微晶陶瓷磨料蜗杆砂轮的磨削性能评价研究

发布时间：2018-07-08 18:48

本文选题：微晶陶瓷砂轮 + 磨削性能　；参考：《山东大学》2017年硕士论文

【摘要】：齿轮磨削是齿轮精加工的最后一道工序,齿轮的加工质量主要取决于砂轮磨削性能的好坏,然而目前对砂轮磨削性能的综合评价较少。本文针对典型齿轮零件(材料为20CrMnTi的直齿齿轮工件)的磨削加工,对微晶陶瓷磨料蜗杆砂轮磨削性能进行综合评价。首先建立了砂轮磨削性能评价指标体系,并确定采用灰色关联分析法作为砂轮磨削性能的综合评价方法;通过单因素实验验证了本研究提出的砂轮磨削性能评价指标体系及综合评价方法的合理性;最后应用该评价方法对两种不同来源的微晶陶瓷磨料蜗杆砂轮进行了磨削性能对比评价。本文的研究成果为砂轮磨削性能综合评价提供了一种新的思路,对企业磨削参数优化具有实际指导意义。建立了针对齿轮零件的砂轮磨削性能评价体系并提出了评价方法。通过理论研究结合学校和企业实际实验条件,确定了以磨削力、砂轮表面形貌(最大出刃高度、均方根高度、偏态和峰度)、齿面粗糙度(平行于加工纹理方向和垂直于加工纹理方向)、齿轮金相烧伤、齿轮加工硬化、齿形齿向精度等级(齿廓偏差、螺旋线总偏差、螺旋线形状偏差和螺旋线斜率偏差)以及残余应力作为砂轮磨削性能指标的评价体系;并根据实验中的数据特点及评价目标,确定选择灰色关联法为砂轮磨削性能的评价方法。通过齿轮磨削实验验证了砂轮磨削性能评价方法的合理性。分别对磨齿进给量及磨削深度进行了单因素齿轮磨削实验,齿轮磨削实验前后测量砂轮磨削性能评价指标的各项具体参数值,再使用灰色关联法对砂轮磨削性能进行评价,该评价结果与企业技术人员现有采用齿形精度、齿面粗糙度等简单指标经验判断砂轮磨削性能优劣的结论是相符合的,即表明本文所提出的砂轮磨削性能评价方法是可行的。针对项目要求及企业需求,将本研究提出的砂轮磨削评价方法应用于企业对两种不同来源的微晶陶瓷磨料蜗杆砂轮的磨削性能对比评价。由于不同的砂轮在加工同样的工件时其砂轮磨削性能最优时的加工参数不一定相同,为使不同的砂轮磨削性能对比更具有合理性,本文首先在YKS7225蜗杆砂轮磨齿机上,采用正交试验法,以灰色关联度值(即砂轮磨削性能的量化)为优化目标,优化出上述两种砂轮在其磨削性能最优时的加工参数,再使用优化后加工参数下各自砂轮反映出来的砂轮磨削性能指标参数进行评价对比。评价结果表明,本企业所使用的两种微晶陶瓷磨料蜗杆砂轮中,砂轮A的磨削性能略优于砂轮B;同时通过该方法优化参数后的砂轮磨削性能均比企业在原设计加工参数下的砂轮磨削性能得到了提高,可见本研究的评价方法对企业磨削齿轮加工砂轮选择与工艺参数制定具有实际指导意义。
[Abstract]:Gear grinding is the last working procedure of gear finishing. The machining quality of gear mainly depends on the grinding performance of grinding wheel. However, the comprehensive evaluation of grinding performance of grinding wheel is few at present. In this paper, the grinding performance of microcrystalline ceramic abrasive worm wheel is comprehensively evaluated for the grinding of typical gear parts (straight gear workpiece with 20CrMnTi material). Firstly, the evaluation index system of grinding performance of grinding wheel is established, and the grey relational analysis method is adopted as the comprehensive evaluation method of grinding performance of grinding wheel. The rationality of the evaluation index system and comprehensive evaluation method of grinding performance of grinding wheel is verified by single factor experiment. Finally, the grinding performance of two kinds of microcrystalline ceramic abrasive worm wheel from different sources was evaluated by this method. The research results of this paper provide a new idea for the comprehensive evaluation of grinding performance of grinding wheel, and have practical guiding significance for the optimization of grinding parameters in enterprises. A grinding wheel grinding performance evaluation system for gear parts is established and the evaluation method is put forward. Through theoretical research and practical experimental conditions in schools and enterprises, grinding force, grinding wheel surface morphology (maximum edge height, root mean square height) were determined. Skewness and kurtosis), tooth surface roughness (parallel to and perpendicular to the texturing direction), metallographic burns of gears, hardening of gears, grade of tooth profile accuracy (tooth profile deviation, total helical deviation), Helix shape deviation and helical slope deviation) and residual stress as grinding wheel grinding performance evaluation system, and according to the experimental data characteristics and evaluation objectives, the gray correlation method is selected as the grinding wheel grinding performance evaluation method. The reasonableness of grinding performance evaluation method is verified by gear grinding experiment. The grinding performance of grinding wheel was measured before and after the grinding experiment, and then the grinding performance was evaluated by grey correlation method. The evaluation result is consistent with the conclusion that the grinding performance of grinding wheel is judged by using simple indexes such as tooth profile precision, tooth surface roughness and so on. That is to say, it is feasible to evaluate the grinding performance of grinding wheel proposed in this paper. According to the requirements of the project and the requirements of the enterprise, the grinding wheel grinding evaluation method proposed in this paper is applied to the comparative evaluation of grinding performance of two kinds of microcrystalline ceramic abrasive worm wheel from different sources. Because the grinding parameters of different grinding wheels are not always the same when machining the same workpiece, in order to make the contrast of grinding performance of different grinding wheel more reasonable, this paper first on the YKS7225 worm wheel grinding machine. The orthogonal test method is used to optimize the machining parameters of the two kinds of grinding wheels when their grinding performance is optimal, taking the grey correlation degree (i.e., the quantization of grinding performance) as the optimization objective. Then the grinding performance index parameters of grinding wheel reflected by each grinding wheel under optimized machining parameters were evaluated and compared. The evaluation results show that in the two kinds of microcrystalline ceramic abrasive worm wheel used in our enterprise, The grinding performance of grinding wheel A is slightly better than that of grinding wheel B, and the grinding performance of grinding wheel after optimizing parameters by this method is improved compared with the grinding wheel grinding performance of enterprise under the original design processing parameters. Therefore, the evaluation method of this study is of practical significance for the selection of grinding wheel and the formulation of technological parameters for enterprise grinding gear machining.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG743

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