离心研磨过程中物料运动特征对加工效果的影响

以在离心场中运动的整团磨料为研究对象,分析了离心研磨机在加工过程中物料运动特征对加工效果的影响.文中通过对高速摄影实验结果的分析,探讨了磨料流在离心场中的运动规律,指明磨料流在运动过程中,其滑移层的运动及前沿界面曲线的变化是影响加工效果的重要因素.通过在不同机器参数下对工件的研磨实验,进一步验证了物料运动特征对加工效果影响的分析结果.     

数控超声磨削陶瓷型面自动编程系统研制

介绍了新研制的数控超声磨削成形加工机床的各运动轴，以及实现平行直纹面数控超声磨削加工的刀位计算和后置处理方法．分析了Visual C＋＋调用Matlab引擎时数据传递过程，实现了自动编程系统软件设计，并试验加工了陶瓷叶片直纹面．该自动编程系统使该机床可充分发挥其功能，所采用的Visual C＋＋与Matlab混合编程方法大大降低了软件开发难度，该方法也可为其它数控加工自动编程系统和非实时系统的开发提供参考．     

Mathematical Modeling of the Numerical Control Cam Grinder Wheel Center Displacement and Its Application

Considering grinding a cam with numerical control(NC)cam grinder,a mathematical model should be estab- lished with the unified parameter based on the original cam-lobe lift data to describe the movement of wheel and establish the relation between the wheel center coordinate,the measuring angle and workpiece's spindle rotation angle.By analyzing,the grinding wheel can be regarded as different followers.To the planar and roller followers,different mathematical models are established, but they can be unified in Eqs.(17)of this paper with the different value of the roller radius r_1.And also the model is suit for the edged follower when assuming the roller radius r_1=0.Experimental verification was done with TKM120 CNC/CBN grinder with NC sets' interpolation according to the model,which shows that high precision parts can be manufactured and this mathemat- ical model can be practically applied for NC cam grinder.     

Mathematical Modeling of the Numerical Control Cam Grinder Wheel Center Displacement and Its Application

Considering grinding a cam with numerical control (NC) cam grinder, a mathematical model should be established with the unified parameter based on the original cam-lobe lift data to describe the movement of wheel and establish the relation between the wheel center coordinate, the measuring angle and workpiece's spindle rotation angle. By analyzing, the grinding wheel can be regarded as different followers. To the planar and roller followers, different mathematical models are established, but they can be unified in Eqs.(17) of this paper with the different value of the roller radius r1. And also the model is suit for the edged follower when assuming the roller radius r1=0. Experimental verification was done with TKM120 CNC/CBN grinder with NC sets' interpolation according to the model, which shows that high precision parts can be manufactured and this mathematical model can be practically applied for NC cam grinder.     

以钴钼废催化剂为原料制备仲钼酸铵试验研究

进行了以钴钼废催化剂为原料制备仲钼酸铵试验研究，采用加碱焙烧、湿式球磨、沉钼酸和氨溶工艺路线。研究结果表明，焙烧温度、时间和纯碱加入量对钼的提取率均有一定的影响，沉钼酸过程除P效果较好，产品仲钼酸铵质量稳定。     

ZGM123G型磨煤机基础台板振动分析及处理

ZGM123G型磨煤机基础台板振动大，经现场分析，对引起磨煤机基础台板振动大的原因进行处理，使其振动值在正常范围，保证磨煤机安全稳定的运行，对解决同类型磨煤机振动大问题具有一定的参考价值。     

双联叶片泵叶片早期磨损原因分析研究

双联叶片泵的早期磨损现象在SF31904型矿用自卸车上非常严重,为了探究其原因本文从油液污染和磨损两方面对其进行分析,通过对取样油液的化验,发现油液污染非常严重,油液中存在大量的硅和钙的化合物等高硬度的摩擦材料,油液的固体污染等级为NAS163812级,在标准中是最高污染等级,再通过叶片的磨损对比、对照实验及理论分析和推理得知其磨损量和磨损系数都较同等条件下的干净油液大了很多,而叶片的运行寿命则短了很多,这说明污染已成为影响叶片寿命的主要原因。     

有色金属矿山磨矿自动控制的探讨

阐述了矿山选矿自动控制技术要求及特点,并对选矿控制方案进行探讨。     

高效离心式研磨机的设计

针对目前国产离心式研磨机存在的研磨头的磨损及研磨精度、密封、动轮与定轮间间隙调整以及主轴组件的集成等问题进行研究与改进 ,给出了问题的解决方案 ,进一步提高了国产研磨机的综合性能 ,使其生产更加高效、清洁。     

超高速磨削实验台主轴系统的精密调整

简述了超高速磨削的概况。对自行研制的超高速实验磨床的主轴径向间隙与轴向间隙、主轴加工精度和表面粗糙度以及轴承供油系统进行了合理的调整。适当加大轴向间隙和径向间隙,且后轴承径向间隙略大于前轴承径向间隙,可保证主轴在超高速运转时正常工作,减少振动,防止抱轴。采用工艺轴刮研轴承获得均匀的径向间隙。超高速磨床主轴与动静压轴承之间相对滑动速度较高,选用粘度较小的L-FD2主轴油,可使主轴得到良好的润滑,减少发热量。提高主轴的加工精度和降低表面粗糙度,可提高主轴的旋转精度和减少主轴的磨损。试验证明合理的选择主轴径向间隙和轴向间隙是改装超高速磨床的关键技术之一。