共查询到20条相似文献,搜索用时 15 毫秒
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Jun-Ming Wang Yang-Ping Tang Hong-Zan Bin Ren-Zhen Ye 《The International Journal of Advanced Manufacturing Technology》2009,41(5-6):481-486
The theoretical error of elliptical groove in outer race of plunging constant velocity joint ground by finger grinding wheel is about 0.004 mm. In order to decrease the error, a new grinding method with basin grinding wheel is proposed. When we optimize the design parameters, the basin grinding wheel will avoid the problems that the feasibility and grinding accuracy are restricted by the interference of the head in the grinding process by means of finger grinding wheel, and can be used to ensure the machining precision and the sectional shape of the raceway to the greatest extent. Aiming at the grinding process with basin grinding wheel, the paper establishes the mathematical model, optimizes the parameters by using simplex algorithm, studies the processing principle in detail, and analyzes the machining errors. The simulation results indicate that the theoretical error for elliptical groove ground by basin grinding wheel will be reduced to 0.631 μm. 相似文献
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X. H. Zhang Z. H. Deng W. K. An H. Cao 《The International Journal of Advanced Manufacturing Technology》2013,64(1-4):165-170
Grinding is used to meet the accuracy and surface finish requirements of the cam profile in most applications. In order to eliminate the contour error and enhance the processing precision of cam grinding, a methodology for contour error precompensation in cam grinding based on case-based reasoning and rule-based reasoning was implemented. By comparing the dimensional error variation and the corresponding adjacent error variation before/after intelligent precompensation, a satisfied result was obtained by applying the methodology to actual processing. 相似文献
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磨削力的建模研究是认识超声磨削机理的重要基础。在超声磨削单颗磨粒运动特性分析基础上,基于工件上被切削掉的磨屑体积应等于砂轮磨削去除的体积的原则,推导出超声磨削平均未变形磨屑厚度公式,得到切屑变形力模型;考虑超声振动对摩擦因数的影响,建立磨粒与工件摩擦力模型。综合切屑变形力模型、摩擦力模型,推导出超声辅助磨削下的磨削力模型,进行21NiCrMo5H齿轮钢材料渗碳淬火后超声磨削试验研究,确定磨削力模型中相关材料系数,得到超声磨削力模型。与现有文献的计算模型相比较,给出的超声磨削力模型与磨削试验测量结果具有更好的一致性,并对超声磨削机理提出了新的认识,为后续研究提供更多的参考与基础。 相似文献
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本文通过一系列的试验,分析了磨削工艺参数对工件表面粗糙度的影响,建立了磨削表面粗糙度的经验公式,研究了陶瓷结合剂CBN砂轮磨削表面粗糙度的变化规律及其特点,这些规律为凸轮轴的CBN高速磨削提供了一系列实用的工艺参数. 相似文献
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在对凸轮磨削动态特性影响进行分析之后,从凸轮轮廓曲线的形成,制造凸轮靠模的过程,论述了在凸轮磨削过程中,如何排除机床动态特性影响的新方法. 相似文献
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提出了实现弧面分度凸轮单侧面磨削加工控制原理,该方法克服了范成法加工的缺陷,解决了空间凸轮单侧面磨削加工控制难题以及砂轮监测和砂轮半径插补问题,给出了砂轮控制数学模型.计算机仿真计算结果证明了该控制方法的有效性,具有重要的实际应用价值. 相似文献
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刘兴富 《机械工业标准化与质量》2002,(12):33-36
本文从标准轴(原始靠模)的选择与制造、靠模的“反靠”、凸轮的磨削、标准凸轮补偿量的确定和“补偿反靠”的工艺程序等方面,论述了凸轮靠模“补偿反靠”的制造方法。 相似文献
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介绍了一种基于UG的新型平面凸轮磨削方法便是在这个基础上提出的,并成功开发了针对平面凸轮磨削的专用机床.该机床较传统的凸轮加工有更高的精度与效率,较低的加工成本,有很大的经济效益. 相似文献
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Wafer rotational grinding is widely employed for back-thinning and flattening of semiconducting wafers during the manufacturing process of integrated circuits. Grit cutting depth is a comprehensive indicator that characterizes overall grinding conditions, such as the wheel structure, geometry, abrasive grit size, and grinding parameters. Furthermore, grit cutting depth directly affects wafer surface/subsurface quality, grinding force, and wheel performance. The existing grit cutting depth models for wafer rotational grinding cannot provide reasonable results due to the complex grinding process under extremely small grit cutting depth. In this paper, a new grit cutting depth model for wafer rotational grinding is proposed which considers machining parameters, wheel grit shape, wheel surface topography, effective grit number, and elastic deformation of the wheel grit and the workpiece during the grinding process. In addition, based on grit cutting depth and ground surface roughness relationship, a series of grinding experiments under various grit cutting depths are conducted to produce silicon wafers with various surface roughness values and compare the predictive accuracy of the proposed model and the existing models. The results indicate that predictions obtained by the proposed model are in better agreement with the experimental results, while accuracy is improved by 40%–60% compared to the previous models. 相似文献