锥形砂轮磨齿机工作原理研究

本文重点研究了锥形砂轮磨齿机的工作原理,并深入解析了机床调整参数的计算方法,可为进一步开发磨齿机床新功能奠定基础;并对数控锥形砂轮磨齿机的进一步研发具有铺垫作用。     

蜗杆砂轮磨齿机几何误差敏感度分析

为识别影响蜗杆砂轮磨齿机空间精度的关键几何误差项,提出一种基于旋量理论和Sobol法的几何误差敏感度分析方法。以YW7232型蜗杆砂轮磨齿机为研究对象,首先,基于旋量理论建立机床的几何误差模型;然后,采用Sobol法计算机床磨削过程中各几何误差项对空间误差分量的敏感度系数,并识别出关键几何误差项;最后,对机床的关键几何误差项进行修正,通过仿真分析对比修正前后机床的空间误差分量以及3种测量模式下球杆仪的杆长。仿真结果表明所提出的方法可有效识别出机床磨削过程中的关键几何误差,这可为提高机床精度提供理论指导。     

隔振片数量对Y7125型磨齿机振动影响的实验研究

为了提高Y7125型机床的动态性能,通过调整隔振片的数量,分析了其对垂直(X方向)和平行(Y方向)于砂轮轴方向振动强度的影响。通过比较不同隔振片数量下磨齿机关键部位的振动的峰值位移,得出了隔振片数量对振动强度的影响规律,确定出了Y7125型机床的最佳工作状态。     

隔振片数量对Y7125型磨齿机振动影响的实验研究

为了提高Y7125型机床的动态性能,通过调整隔振片的数量,分析了其对垂直（X方向）和平行（Y方向）于砂轮轴方向振动强度的影响。通过比较不同隔振片数量下磨齿机关键部位的振动的峰值位移,得出了隔振片数量对振动强度的影响规律,确定出了Y7125型机床的最佳工作状态。     

基于Pro/E的数控成形磨齿机参数化建模

在传统磨齿机的基础上,采用功能强大的Pro/E三维实体建模软件,进行数控成形磨齿机的三维建模,实现磨齿机的参数化设计.Pro/E可以方便地设计出磨齿机的三维实体模型,进行装配和干涉检查,在做出磨齿机之前就可以模拟实物零件进行装配及测试,为磨齿机产品的更新换代提供方便.     

控制变位齿轮的剃齿噪音

根据变位齿轮噪音产生的原因,设计剃前专用刀具,控制变位齿轮剃齿前的加工精度及剃齿刀特殊修磨方式,有效地控制了齿轮噪音,根据实践进行综合利用。机床的噪音是零件制造的精度(如齿轮、轴、套等)、配套件的精度(如轴承等)、装配精度等综合精度反映。所以要对齿轮的精度提出很高要求。齿轮在机床中的用途主要是:传递速度,传递动力,传递扭矩和用于分度等。结合实际对设备、工装、刀具等影响齿轮噪音的各个环节进行了分析,重点阐述了加工误差对齿轮噪音的影响,介绍了具体的解决办法。     

采用粘弹阻尼结构改善卧式磨齿机的振动特性

一、慨述阻尼材料和阻尼减振技术如今已日益成为一个新的技术领域.世界上一些技术先进的国家在近二十年内进行了大量的研究,主要用于结构的减振和降噪.而当今,在工程制造的广阔领域中,结构振动仍是一个主要的问题.由于粘弹阻尼材料具有刚度低,阻尼大,结构轻小,使用方便等特点,因此得到了广泛的应用.在机床行业中,国产卧式磨齿机存在有滑     

破碎粉磨设备的现状及发展

介绍了破碎磨设备的研制现状，着重阐述了其结构，原理及适应范围，同时对今后破磨设备的发展作了评述。     

基于COM组件的螺旋锥齿轮仿真系统实现方案

通过对机床仿真系统的模块化分析,提出了COM（Component Object Model）组件模式实现螺旋锥齿轮数控仿真系统的开发,用以在通用环境下快速地开发出高效可用的机床加工仿真系统。对不同语言环境下开发模块的整合和数据交换,共享作了分析。针对机床仿真加工的模块特征对模块的实现环境及外部接口均作了描述说明。最后,以5轴联动数控螺旋锥齿轮加工机床仿真系统的实现为例,验证了本文对机床仿真系统在多环境下通过COM组件技术实现的开发模式。     

伺服运动控制器的调试方法研究

数控机床各进给轴伺服驱动器的参数设置是机床整机调试的一项重要工作。合理的参数设置,是保证机床的加工精度、运行平稳性等基本性能的关键因素之一。通过具体的实践总结,介绍伺服驱动器相关参数设置的基本原则、方法和过程,为数控机床厂商及用户的设备调试与维护提供良好的借鉴。     

球磨机大齿轮安装

球磨机是物料被破碎之后,再进行粉碎的关键设备。本文以球磨机在载荷下的实际接触精度为例,通过对球磨机大小齿轮中心距的调节,使球磨机的大小齿轮正确啮合,使齿均布受力,从而减少磨损,提高球磨机的使用寿命,进行下述分析。     

齿轮精度与变速器啸叫声控制的定量分析

齿轮的精度对变速器齿轮副啸叫噪声有重要影响,提高齿轮精度是控制啸叫声的一个重要手段。以452AMT变速器主减齿轮为研究对象,把其传统的剃齿工艺更改为热后磨齿工艺,使齿轮精度提高3个等级,齿轮微观参数的正态分布标准差σ提高1倍以上,且更符合设计要求。最后把两种状态下各5台变速器先后通过下线台架EOL振动和1台整车NVH客观测试的单因素和正交试验的对比分析,变速器壳体振动强度下降1/2左右,车内主减齿轮副啮合阶次啸叫声加速和滑行时分别降低3 dB(A)和6 dB(A)左右。研究揭示齿轮精度对齿轮啸叫影响的机理,对变速器NVH的理论与应用具有一定的学术和工程意义。     

齿轮开裂失效分析

采用断口分析、化学成分分析、低倍检验、金相检验和硬度测试等方法对某批经渗碳、淬火热处理及磨齿加工后放置一段时间发生开裂的齿轮的失效原因进行分析。结果表明：齿轮渗碳层碳化物级别过高,加上淬火后齿轮齿部应力集中,磨齿时又产生磨削裂纹,齿轮在放置期间由于应力导致裂纹扩展而开裂。     

Quality evaluation of internal cylindrical grinding process with multiple quality characteristics for gear products

Gears are among the most crucial components in the transmission systems of machine tools. Gear manufacturing includes a number of processing procedures. The grinding process is an important procedure involving high precision and fairly small grinding surfaces. For this reason, this study aimed at developing a quality assessment model for the internal cylindrical grinding process of gears. The Six Sigma quality indices (SSQIs) were used to directly assess the quality of the internal cylindrical grinding process due to their ability to directly reflect quality level and process yield. Since the process may include nominal-the-best (NTB), larger-the-better (LTB) and smaller-the-better (STB) quality characteristics, so we used the variable transformation method to normalise the specifications of each quality characteristic for the convenient and effective management and analysis of process performance for multiple quality characteristics. We then constructed a multi-characteristic process quality analysis chart (MPQAC) to simultaneously assess the quality levels of various quality characteristics. Furthermore, the MPQAC can provide references for process improvement. This ensures the quality of internal cylindrical grinding and enhances the quality of gear and machine tool products. Finally, a real-world application and numerical experiments demonstrate the effectiveness and practical applicability of the proposed method.     

Topographic error analysis of a gear plunge shaving cutter finished by a cone grinding wheel

Abstract

Gear shaving is one of the most efficient and economical ways to finish gears roughed by hobbing or shaping. The theoretical pitch surface of a gear plunge‐shaving cutter is a hyperboloid with hollow tooth form. The tooth profile of a plunge shaving cutter is usually ground by a cone grinding wheel. In this paper, we propose a mathematical model to calculate the topographical error of the tooth surface of a ground plunge‐shaving cutter compared with the theoretical tooth surface that is conjugated with the work gear. The proposed mathematical model can be used to calculate the profile data of the cone grinding wheel and the corresponding machine setup at a predetermined operating pitch cylinder. The topographic error sensitivities of the plunge‐shaving cutter due to varied operating pitch cylinder, helix angle, and grind wheel data are discussed based on the proposed mathematical model. This paper provides approximate guidance for choosing the proper operation cylinder, the helix angle, and the geometrical data of the cone grinding wheel for the finishing or resharpening of the plunge shaving cutter.     

卧式超细粉磨机的试验研究与结构优化

研究卧式超细粉磨机内部结构对粉磨效果的影响,通过对设备结构的分析,结合试验情况,找到影响卧式超细粉磨机粉磨效率的关键因素,即两个粉碎室内粉磨形式的不同和物料在粉碎室内的运行轨迹,并根据CM51型超细粉磨机的具体情况提出结构优化改进措施。     

Continuous generating grinding method for beveloid gears and analysis of grinding characteristics

Continuous generating grinding has become an important gear processing method owing to its high efficiency and precision. In this study, an adaptive design model is proposed for the continuous generation of beveloid gears in common gear grinding machines. Based on this model, a method for determining the installation position and grinding kinematics is developed alongside an analytical meshing model for grinding contact trace and derivation of key grinding parameters. By combining these aspects, a general mathematical model for the continuous generation of beveloid gears is presented, comprising the entire grinding process from worm wheel dressing to the evaluation of grinding deviation. The effects of the worm and dressing wheel parameters on the grinding deviation were analysed, facilitating the development of an approach to improve the grinding accuracy. The presented procedure represents a novel design method for the continuous generation of beveloid gears in common gear grinding machines, facilitating the appropriate selection of worm and dressing wheel parameters.The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-022-00388-z     

齿轮成型磨削的分度补偿技术研究

文章以分度理论为基础,分析了齿轮成型磨削时,分度机构的工作原理和分度误差产生的机理,找出了影响分度机构传动精度的主要误差源,确立了完整的在机分度误差补偿方案,进行了控制系统的设计和控制程序的编制,通过试验验证了分度误差理论分析的正确性和整个误差补偿系统的实用性。     

应用于磨床砂轮磨钝及故障检测的神经网络研究

磨床在磨削过程中砂轮会逐渐变钝。当它变钝后,需要进行修快。针对砂轮变钝时间的不定性,利用神经网络进行砂轮监控,以便于充分把握修快时机,达到及时、经济的修快。同时对砂轮意外碰撞、破碎进行监控。