平面磁力研磨试验台设计

磁力研磨是一种零件研磨和光整加工的新工艺，它是利用磁性磨料在磁场作用下对工件表面进行研磨和抛光加工。     

自由磨粒复杂曲面磁力研磨光整加工试验研究

为了实现复杂曲面模具表面高质量高效率磁力研磨光整加工,在3-TPT五自由度并联机床上进行磁力研磨光整加工的试验研究,对复杂曲面模具自动化研磨光整加工进行了初步探索.从理论上研究了自由磨粒磁力研磨光整加工机理,并针对不同形状的加工对象,实验研究了磁感应强度、研磨间隙、磨粒粒度以及研具表面形状对磁力研磨光整加工的影响及其变化规律.     

磁力研磨法的原理及其应用

磁力研磨法,50年代初起源于苏联、保加利亚等东欧国家。60年代发展比较迅速,相继研制出了一些实用机床。如苏联的1、2、4等型号平面磁力研磨机床。近年来日本学者对磁力研磨法进行了系统的研究,开发了外圆柱面、平面、球面、复杂曲面的磁力研磨方法。研磨后表面粗糙度可达Ra0.2μm。该法主要应用于零件表面的抛光、去毛刺、棱边倒圆等方面。     

磁性磨料磁力研磨工艺研究

采用自行设计制造的加工装置,进行了磁性磨料磁力研磨工艺试验。试验结果表明：工件转这仅对加工效率有正比例影响;国工间隙的增大则引起加工效率的下降,加工表面粗糙度值的上升;存在磁通密度度最佳值点,该条件下可获得较高的加工效率与加工质量;试验还表明在加工初期具有较高的金属去除率,表面粗糙度也下降较快。     

型面研磨新方法——磁力研磨法

磁力研磨法作为一种新的光整加工方法 ,可以研磨加工内、外圆柱面、平面、狭小空间表面、自由曲面及棱边去毛刺 ,国内外都已经做了大量的研究工作 ,有些方面已应用到生产中。     

滚动轴承滚道磁力研磨超精加工的实验研究

介绍了用磁力研磨装置对滚动轴承滚道进行超精加工的方法,阐述了该磁力研磨装置的设计与计算,给出了实验初步结果.该加工方法为滚动轴承滚道的超精加工提供了一种新的途径.     

磁力研磨技术

磁力研磨是一种微细特种加工方法,在此介绍了磁力研磨加工的原理及特点,对磁性磨料的制备技术及要点作了简述,并对磁场场强、场强梯度、磁极分布等研磨参数以及工件与磨粒相对运动方式对研磨质量的影响进行了讨论,同时报告了国内外磁力研磨技术研究及工业应用的现状。     

滚动轴阴滚道磁力研磨超精加工的实验研究

介绍了用磁力研磨装置对滚动轴承滚道进行超精加工的方法,阐述了该磁力研磨装置的设计与计算给出了实验初步结果。该加工方法为滚动轴承滚道的超精加工提供了一种新的途径。     

数控铣床磁力研磨加工的研究

为实现模具型腔在经济型数控铣上精铣后的光整加工，我们直接在经济型数控铣床上，采用磁力研磨工艺对模具型腔进行光整加工，取得了很好的效果。     

电解磁力研磨技术

随着科学技术的飞跃发展,对零件的表面光整加工和棱边精加工提出越来越高的要求。在国内外精加工领域中?人们正在通过各种渠道,借助于多种能量形式,探索新的工艺途径。 电解磁力研磨加工工艺是将电化学加工复合到磁力研磨工艺上,适合于高强度、高硬度和高韧性等难加工材料的表面和棱边光整加工的新颖工艺。 本文在开发研制电解磁力研磨工艺装置的基础上,论述了电解磁力研磨加工原理和加工过程中各因     

金刚石刀具磨损机理的探讨

分析和探讨了金刚石刀具的磨损形态和磨损机理，提出了金刚石刀具在制造与使用时应注意的若干问题。     

Abrasion by lamellar solid lubricants

The extent to which lamellar solid lubricants (graphite, MoS₂, BN, etc.) are abrasive has been determined by measuring the rate of wear of phosphor-bronze sliding against PTFE in the presence of the powdered solid. Dispersions in silicone fluid are preferable to dry powder in order to avoid complicating effects due to transfer of the solid lubricant to the sliding surfaces. There are significant differences in the abrasiveness of samples of MoS₂ conforming to Standard Specifications and it is suggested that a major factor responsible is the degree of perfection of the crystal structure. This aspect may be particularly important for boron nitride and account for its inability to function as an effective solid lubricant.     

卧式磁力泵轴向力平衡及回流孔设计

通过分析泵内腔压力得到了回流孔的大小尺寸,并计算了典型磁力泵转子的轴向受力和磁钢的回复力大小。结果表明,合理设计冷却回流孔可以确保泵腔温度保持正常,调整前、后口环的大小可以平衡转子轴向受力。     

Abrasion of cemented carbides by small grits

The abrasion properties of a series of cemented carbides with different carbide grain sizes, different amounts and types of binder phases have been investigated under varied conditions. Abrasion results from other works are also incorporated for comparison reasons. The results are interpreted in the light of a previously published model for the abrasion properties of multiphase materials, although this is the first time this model is applied to materials with very high amounts of hardphase. It is confirmed that the abrasion resistance of tungsten carbide–cobalt materials may vary considerably, also for fixed amounts of metal and hardphase. Not only the wear resistance level but also the ranking depends both on the test conditions and on the microstructure. It is further showed that some nano-crystalline materials posses a wear resistance superior to those of the pure carbide material.     

Evidence of Superposition between Grooving Abrasion and Rolling Abrasion

In ball-cratering wear tests, two abrasive wear modes are commonly observed, grooving abrasion and rolling abrasion, which act in distinct areas. Observing this tendency, the aim of this article is to discuss the characterization of an intermediate condition, in which the superposition of the grooving and the rolling abrasive wear modes is observed. This phenomenon is referred to as microrolling abrasion due to the following particular characteristic: the rolling abrasion was found to act on the grooving abrasion. Additionally, in a defined sliding distance range and normal force range, microrolling abrasion is qualitatively observed to be proportional to the sliding distance and inversely proportional to the normal force.     

高温、强磨损环境热电偶选型技术要求的探讨

本文简要介绍了热电偶测温原理,针对我厂l＃焙烧炉主炉和预热炉温度检测存在的问题,提出了具体的技术要求,解决了生产中一大难题。     

采用共挤技术提高绝缘电线的耐磨性能

1介绍在电线电缆耐磨方面,已经有过许多研究,特别是在汽车行业和石油开采业,在近海石油工业中,电缆必须能够抵御来自延伸到井里面的检测工具的破坏。在汽车工业,耐磨要求处理主要是由于电线线束安装或组装的需要;为了避免由于直接     

磨损与磨损可靠性

针对机械产品中大量存在的磨损失效问题,分析了常见的磨损失效类型及其主要影响因素,给出了国内外目前主要的计算磨损量的数学模型,最后结合算例对机构磨损可靠性的计算模型进行了阐述.     

磨损与磨损可靠性

针对机械产品中大量存在的磨损失效问题,分析了常见的磨损失效类型及其主要影响因素,给出了国内外目前主要的计算磨损量的数学模型,最后结合算例对机构磨损可靠性的计算模型进行了阐述。     

Abrasion properties of forged fibre-reinforcedaluminium

The effects of forging on the abrasion properties of fibre-reinforced aluminium have been investigated. Metal matrixcomposites with 20 or 30 vol% short Al₂O₃-fibres in an aluminium alloy matrix were forged and evaluatedregarding the wear resistance and friction in a pin-on-cylinder abrasion setup. The microstructure and wear mechanisms have beenstudied with scanning electron microscopy. It has been shownthat the dependence on fibre content and forging is differentdepending on the type of abrasion. The wear resistance of thecomposites increased with fibre content and decreased due to forging, in milder abrasion. In more severe abrasion there wasa tendency towards the opposite behaviour: decreased wearresistance with fibre content and increased with forging. Anincreased amount of fibre reinforcement decreased thecoefficient of friction.