共查询到19条相似文献,搜索用时 109 毫秒
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磁性流体研磨法是70年代新开发研究的一种加工方法,具有高精度、高效率和加工表面无变质层的特点,特别适合难研磨材料和复杂形状表面的研磨加工,并能在研磨加工过程中控制研磨效率和研磨精度。磁性流体研磨法包括悬浮式磁性流体研磨和分离式磁性流体研磨两大类。国外对此进行了大量的研究工作。在悬浮式磁性流体研磨方面,对多种试件材料进行了研磨加工试验,分析了磁性流体研磨的影响因素,提出了非磁性物质存磁性流体内的受力公式,初步形成了用于生产的悬浮式磁性流体研磨加工技代。在分离式磁性流体研磨方面,分析了磨料的构成因素对研磨表面质量的影响,设计了多种分离式磁性流体研磨装置,并对多种试件材料进行研磨加工,也已初步用于生产。近几年,我国也已开始磁性流体研磨的 相似文献
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介绍了小孔内圆表面磁性磨料研磨的加工原理以及加工试验,得出了磁感应强度、加工间隙和研磨时间对被加工内孔表面粗糙度和金属去除量的影响,从而优化出小直径内孔表面磁性磨料研磨的各项加工参数,有一定的指导和借鉴作用。 相似文献
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外圆表面磁性研磨加工的研究 总被引:10,自引:1,他引:10
以加工外圆表面为例,分析对影响磁性研磨这一种新的表面光整加工工艺中的和种工艺参数进行佤分析,探求外圆表面磁性研磨加工的最佳工艺参数。 相似文献
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本文介绍了磁性磨料研磨的加工原理,不仅对磁极的形状加以分析,还对工件在磁场中的受力情况进行理论分析。对淬硬了的工件外圆进行磁性磨料研磨的加工试验,得出了有轴向振动,无轴向振动,不同的轴向振动频率,以及不同研磨时间对加工表面粗糙度和研磨量的影响;从而得出了优化的磁性磨料研磨的加工参数。对实施实际的磁性磨料研磨的加工有一定的指导和借鉴作用。 相似文献
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平面磁研磨法的研究:非磁性金属材料的研磨特性和加工机理的考察 总被引:1,自引:0,他引:1
利用磁研磨法加工非磁性金属平板的表面时,在通常的磁性磨料中混入大粒径磁性粒子(铁粒子),可以显著提高加工效率。由不锈钢毛病产板的研磨实验中以看到:混入的铁粒子的粒径及其混合比例对加工效率影响很大。在研磨加工中,研磨压力存在最佳值。 相似文献
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本文对磁性研究加工的机理进行了分析研究,并就外圆表面的研磨工艺参数对研磨特性的影响规律作了实验研究。 相似文献
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磁力研磨法加工弯管内表面的工艺参数优化 总被引:1,自引:0,他引:1
利用磁力研磨法,使安装在六自由度机械手的磁力研磨装置带动弯管内部的磁粒刷沿弯管中心轴线往复运动,同时磁力研磨装置旋转,解决空间弯管内表面研磨加工的技术难题。选取了影响磁力研磨工艺抛光弯管内表面的主要工艺参数(磁极转速、加工间隙、磁性磨粒粒径、轴向进给速度)并应用正交试验设计法对钛合金弯管内表面进行了研磨试验,结合试验数据对工艺参数进行了分析和优化。通过对比钛合金弯管内表面研磨前后的表面粗糙度及形貌变化,验证了采用磁力研磨工艺对弯管内表面进行光整加工的可行性和可靠性。 相似文献
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采用粘结法制备磁性磨料,对磨料制备工艺进行了优化,确定了最终的工艺方案.通过实验对所制备的粘结磁性磨料进行了性能分析,结果表明磁性磨料粒度为40目时研磨效果最佳,用于模具钢的磁性研磨原始表面Ral.87微米经过4分钟加工可降低到Ra0.4微米左右;氧化铝磁性磨料比碳化硅磁性磨料具有更好的耐用度,持续研磨加工时间可达16分钟;研磨初期工件表面粗糙度快速降低,之后降低趋于平缓;采用由粗到细的磁性磨料分步加工可有效降低表面粗糙度值、缩短加工时间,原始表面Ra2.092微米经过40目、60目、80目磁性磨料各加工4分钟后粗糙度可以达到Ra0.11微米. 相似文献
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为了提高钛合金锥孔的研磨质量和研磨效率,提出了采用超声波振动辅助磁力研磨的复合加工方案。加工时,磨粒在磁场束缚下切削锥孔表面,并对其进行不断撞击,且因为磁场力、超声振动力和离心力等综合影响的原因,磨粒的切削轨迹呈现明显的多向性。针对钛合金锥孔,与传统磁力研磨法进行试验对比,并分析研磨后试件的材料去除量、表面粗糙度和表面形貌等来验证超声磁力复合研磨的效果。结果表明:超声磁力复合研磨加工效率得到提高;锥孔的材料去除量增加至1.6倍;研磨后锥孔平均表面粗糙度由原始的Ra1.23 μm降至Ra0.25 μm,下降率是传统工艺的1.3倍;试件表面的微波峰、凹坑和加工纹理均被去除,锥孔表面质量得到显著提高,且试件形状精度得到改善。 相似文献
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集群磁流变变间隙动压平坦化加工试验研究 总被引:3,自引:1,他引:2
为了提高光电晶片集群磁流变平坦化加工效果,提出集群磁流变变间隙动压平坦化加工方法,探究各工艺参数对加工效果的影响规律。以蓝宝石晶片为研究对象开展了集群磁流变变间隙动压平坦化加工和集群磁流变抛光对比试验,通过检测加工表面粗糙度、材料去除率,观测加工表面形貌、集群磁流变抛光垫中磁链串受动态挤压前后形态变化,研究挤压幅值、工件盘转速、挤压频率以及最小加工间隙等工艺参数对加工效果的影响规律。试验结果表明:集群磁流变平坦化加工在施加工件轴向微幅低频振动后,集群磁流变抛光垫中形成的磁链串更粗壮,不但使其沿工件的径向流动实现磨粒动态更新、促使加工界面内有效磨粒数增多,而且在工件与抛光盘之间的加工间隙产生动态抛光压力、使磨粒与加工表面划擦过程柔和微量化,形成了提高材料去除效率、降低加工表面粗糙度的机制。对于2英寸蓝宝石晶电(1英寸=2.54 cm)集群磁流变变间隙动压平坦化加工与集群磁流变抛光加工效果相比,材料去除率提高19.5%,表面粗糙度降低了42.96%,在挤压振动频率1 Hz、最小加工间隙1 mm、挤压幅值0.5 mm、工件盘转速500 r/min的工艺参数下进行抛光可获得表面粗糙度为Ra0.45 nm的超光滑表面,材料去除率达到3.28 nm/min。证明了集群磁流变变间隙动压平坦化加工方法可行有效。 相似文献
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An internal magnetic abrasive finishing process using a pole rotation system was proposed to produce highly finished inner surfaces of workpieces used in critical applications. Previous research found that the process incorporating one of the characteristic behaviors of the abrasive, the jumbling of the abrasive, results in aggressive contact of the abrasive against the inner surface, disturbing the smooth surface finish. The aim of this paper, therefore, is to characterize the in-process abrasive behavior against the surface and its effects on the finishing characteristics and to describe the finishing mechanism. The magnetic force acting on the magnetic abrasive, controlled by the field at the finishing area, is considered the primary influence on the abrasive behavior against the inner surface of the workpiece. This study examines the relationships between the magnetic field, the force on the abrasive, and the abrasive behavior. The surface roughness and material removal measurements resulting from finishing experiments demonstrate the effects of the abrasive behavior on the surface modifications. This paper also proposes a method to monitor the in-process abrasive behavior to facilitate processing. 相似文献
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S.C. Jayswal V.K. Jain P.M. Dixit 《The International Journal of Advanced Manufacturing Technology》2005,26(5):477-490
Magnetic abrasive finishing (MAF) is one of the advanced finishing processes, which produces a high level of surface quality and is primarily controlled by a magnetic field. In MAF, the workpiece is kept between the two poles of a magnet. The working gap between the workpiece and the magnet is filled with magnetic abrasive particles. A magnetic abrasive flexible brush (MAFB) is formed, acting as a multipoint cutting tool, due to the effect of the magnetic field in the working gap. This paper deals with the theoretical investigations of the MAF process. A finite element model of the process is developed to evaluate the distribution of magnetic forces on the workpiece surface. The MAF process removes a very small amount of material by indentation and rotation of magnetic abrasive particles in the circular tracks. A theoretical model for material removal and surface roughness is also proposed accounting for microcutting by considering a uniform surface profile without statistical distribution. Numerical experiments are carried out by providing different routes of intermittent motion to the tool. The simulation results are verified by comparing them with the experimental results available in the literature. 相似文献
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S.C. Jayswal V.K. Jain P.M. Dixit 《The International Journal of Advanced Manufacturing Technology》2005,26(5-6):477-490
Magnetic abrasive finishing (MAF) is one of the advanced finishing processes, which produces a high level of surface quality and is primarily controlled by a magnetic field. In MAF, the workpiece is kept between the two poles of a magnet. The working gap between the workpiece and the magnet is filled with magnetic abrasive particles. A magnetic abrasive flexible brush (MAFB) is formed, acting as a multipoint cutting tool, due to the effect of the magnetic field in the working gap. This paper deals with the theoretical investigations of the MAF process. A finite element model of the process is developed to evaluate the distribution of magnetic forces on the workpiece surface. The MAF process removes a very small amount of material by indentation and rotation of magnetic abrasive particles in the circular tracks. A theoretical model for material removal and surface roughness is also proposed accounting for microcutting by considering a uniform surface profile without statistical distribution. Numerical experiments are carried out by providing different routes of intermittent motion to the tool. The simulation results are verified by comparing them with the experimental results available in the literature. 相似文献