钙基脱硫过程矿物质对结渣影响的实验研究

对六盘水无烟煤中添加石灰石的钙基脱硫试样的结渣特性、加热过程中矿物质特性进行了实验研究．通过对不同混合比的钙基脱硫灰样熔融特性温度的测定、利用X射线衍射分析对加热过程中钙基脱硫灰样的矿物质特性进行了分析．结果表明：六盘水无烟煤中添加石灰石,当钙硫质量分数之比为2时,钙基脱硫灰样结渣特性由中等变为严重;当钙硫质量分数之比为3时,钙基脱硫灰样结渣特性又变为中等．究其原因是由于高温下,钙硫质量分数之比为2时钙基脱硫灰样中产生较多钙长石和钙(铝)黄长石等熔点较低的矿物质,从而使结渣特性由中等变为严重;当钙硫质量分数之比为3时,钙基脱硫灰样中的部分矿物质分解生成难熔矿物质方钙石,使结渣特性又变为中等．     

Dynamic back-propagation neural net for adaptive controller

A kind of single-input single-output neural net adaptive controller (SISO-NNC) and its algorithm have been presented. For the computer simulation and the special requirements of control problem, we have improved traditional BP algorithm and solved the problem of local minimum to some extent. Using the SISO-NNC to control time-varying system, the simulation results show advantages of neural net controller in control field. Zhu Qiuping: born in 1946, Associate professor     

Research on Bipolar Pulse Current Electroforming in Precision Molds and Dies

Electroforming is a specialised electroplating process for the manufacture of precision metal parts and mold tooling. Because it can simplify technical process and shorten molding cycles, electroforming is also a rapid manufacturing technology. Compared with direct and unipolar pulse current, bipolar pulse current in electroforming can obtain fine structure and grain size as well as surface leveling, resulting in better precision and surface finish. In this paper, bipolar pulse current electroforming is introduced. The influencing parameters such as electrolyte parameter, additives, current density, pH, temperature, and pulse parameters have been studied by experiments. Experiments on nickel electroforming in molds and dies have been done. The results indicated that bipolar pulse current electroforming could improve the quality and precision further, while reducing internal stress.     

集成电路基板研磨表面误差自动修正技术

针对现有ＬＳＩ基板研磨过程中,表面误差修正中存在的问题,提出了一种表面误差自动修正系统。该系统采用激光技术测量研磨中的基板表面状况;并以此为基础建立加工状况数据库,同时采用楔形机构对基板表面误差修正控制。     

Research on Bipolar Pulse Current Electroforming in Precision Molds and Dies

Electroforming is a specialised electroplating process for the manufacture of precision metal parts and mold tooling. Because it can simplify technical process and shorten molding cycles, electroforming is also a rapid manufacturing technology. Compared with direct and unipolar pulse current, bipolar pulse current in electroforming can obtain fine structure and grain size as well as surface leveling, resulting in better precision and surface finish. In this paper, bipolar pulse current electroforming is introduced. The influencing parameters such as electrolyte parameter, additives, current density, pH, temperature, and pulse parameters have been studied by experiments. Experiments on nickel electroforming in molds and dies have been done. The results indicated that bipolar pulse current electroforming could improve the quality and precision further, while reducing internal stress.     

靠模凸轮廓线设计及凸轮加工的误差分析

本文推导出靠模廓线的方程，并对滚子和摆杆尺寸误差对凸轮廓线加工精度的影响进行了分析，这对提高凸轮加工精度具有一定的实际意义。     

低碳低合金三相钢的研究与应用

自行设计一种以Ｓｉ、Ｍｎ为主要合金元素的低碳低合金三相钢，经７００～７４０℃临界区热处理获得（８～１５）％Ａ＋（２０～３０）％Ｍ＋Ｆ不同体积百分比的三相组织。应用光学显微镜、透射电镜、Ｘ射线衍射仪、拉伸试验机研究了三相钢在冷变形过程中的显微组织变化，探讨了冷成型高强度螺栓的强化机制。制成了８．８级、９．８级、１０．９级高强度螺栓。     

光学元件气囊抛光去除效率影响因素研究

基于Preston方程分析了气囊抛光特性,确定去除函数的三个重要特征,即抛光斑尺寸、形状以及去除量,得到影响光学元件气囊抛光材料去除效率的主要参数.通过定点抛光实验,分析气囊充气压强、压缩量、主轴转速对BK7光学元件去除函数和材料去除效率的影响.结果表明:充气压强与压缩量对于气囊抛光去除函数的形状影响较大,去除效率随气囊充气压强增大先升高到2.08mm3/min后逐渐降低然后又升高,压缩量与气囊转速的提高增大了材料的去除效率,分别可以达到6.84mm3/min和5.04mm3/min.     

凸轮磨削产生振纹原因的探讨

本文通过对凸轮在磨削过程中，由于磨削力的变化而引起凸轮表面振纹原因的分析，找出了磨削力的变化规律及其对凸轮精度的影响，并提出了解决的问题办法。