纵向磨削砂轮堵塞的试验研究

本文研究了纵向外圆磨削中,工件转速,修速速度,走刀量,磨削厚度及冷却液对硝轮堵塞深度和而积的影响。初步探讨了纵磨时,砂轮堵塞的基本规律。     

Method for grinding and delaminating muscovite

A method of dry grinding muscovite based on the use of knife-mills is reported. It was possible to produce mica with a particle size below 100 and 45 μm. After grinding, the samples were submitted to sonication treatment, which promoted delamination of the material. The particle size distribution shows that sonicated mica has more particles in the size range 10-50 μm than does non-sonicated mica have.This also indicates a decrease in the average particle size. Characterization of the treated muscovite by scanning electron microscopy revealed a highly delaminated material with a plate-like structure. The products were characterized by chemical analysis and X-ray diffraction, too. This mica has already been used for the synthesis of pearlescent pigments.     

切入磨削砂轮堵塞的试验研究

本文阐述了运用正交设计的方法,对切入磨削中砂轮进给速度、工件转速、修整速度及深度给予砂轮堵塞的影响进行了实验研究,初步探讨了砂轮堵塞的机理。     

Study to analyze the influence of sprouting of the wheat grain on the grinding process

Several studies have been carried out on the grinding characteristic of three species of common wheat (Triticum aestivum, ssp. vulgare). The three-day germinated kernels were pulverized in a micro hammer mill equipped with a changeable screen. The moisture of samples was 12% (w.b.). The results showed that the sprouting of wheat had a significant influence on the grinding process. The average particle size of the pulverized material obtained from the sprouted kernels was almost always significantly lower than those from the sound kernels. The highest changes were observed in the increase of the fraction of particles below a size of 200 μm, caused by sprouting. The sprouting caused a decrease in the value of specific grinding energy in all cultivars. Based on the parameters of screen openings and cultivar, the values of specific grinding energy ranged from 35.5 to 141.6 kJ kg⁻¹ and from 41.4 to 164.3 kJ kg⁻¹ for the sprouted and sound kernels, respectively. In addition, the other values of grinding energy indices confirmed that sprouting significantly reduced the grinding energy requirements. The average value of the grinding ability index was 3.9 and 4.8 kJ m⁻² for the sprouted and sound wheat, respectively. Whereas, sprouting caused a decrease in the average value of the grinding index from 71.2 to 58.0 kJ kg⁻¹ mm^0.5.     

最低成本磨削用量的计算

本文详细讨论了最低成本磨削用量的计算问题,确定以最低单件成本为目标函数,以机床功率、磨削烧伤和表面粗糙度的限制为约束条件,选择约束非线性规划中之随机试验法和复合形法进行寻优计算,较方便地求得了约束最优解x~*和F(X~*)     

Predicting grinding burn using artificial neural networks

This paper introduces a method for predicting grinding burn using artificial neural networks (ANN). First, the way to model grinding burn via ANN is presented. Then, as an example, the prediction of grinding burn of ultra-strength steel 300M via ANN is given. Very promising results were obtained.     

球磨机介质配比方法的试验研究

对生产中简单实用的主要介质配比方法进行了试验比较。结果表明,确定适宜介质配比的方法是：根据给料粒度组成,先确定各主要窄给别对应的最佳介质尺寸,然后各直径球介质占球荷总质量的百分率等于给料中相应窄级别的产率确定介质配比;如果给料中粗粒级含量低,磨矿时间较长,磨机矿浆粘度较大,可按照各尺寸介质等质量百分比法计算介质配比,以适当增加大球介质的比例,提高磨矿效率。该研究结构对实际生产具有重要的指导意义。     

基于智能优化控制的磨矿过程综合自动化系统

本文首先概述了磨矿的工艺过程和控制要求,然后从系统结构与功能、智能优化控制策略等方面详细描述了磨矿过程综合自动化系统,最后谈到该系统的实施及应用效果。     

磨料用量与喷嘴直径相关关系的实验研究

本研究以实验为基础,利在回归分析法建立了磨料用量与喷嘴直径之间的相关关系,为工程应用中地喷砂清理提供了理论指导。     

外圆无心磨削质量控制的灰色预测模型

本文对如何建立外圆无心磨削质量控制的灰色预测模型问题进行了探讨，重点分析了等维灰数递推动态预测模型的建模方式，也初步分析了灰区间预测控制和灰模块预测控制的可能性，通过实验验证了预测的精度．