共查询到20条相似文献,搜索用时 62 毫秒
1.
介绍两种电磁振动磁极头的结构及原理,这种机构结构简单,体积小、质量轻、振动频率高,可以实现强力研磨。对该机构的摩擦力、电磁力及磁势损失进行了分析计算。 相似文献
2.
3.
4.
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 相似文献
5.
6.
磁力研磨法的原理及其应用 总被引:1,自引:0,他引:1
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。 相似文献
7.
刘秀娟 《精密制造与自动化》2003,(2):29-29
研磨是精加工中最常用的光整加工方法之一,是修配和制造精密零件不可缺少的工序,随着科学技术的不断发展,国内外专家都在探索新的精密、高效、节能的加工机理和方法。磁力研磨就是国外70年代把磁场理论应用到机械加工方面,使普通的机械研磨变为物理、化学、机械综合的加工方法。其优点是加工速度快、质量好、成本低和效率高。磁力研磨是外加磁场所产生的磁力作用下,利用强磁体与氧化铝等材料为基础,科学混合磨料做为研磨剂的一种新的加工方法。磁力研磨首先由苏联开发并应用在工件倒角、去毛刺的工序上,随后,德国、日本等先进国家很快把磁力… 相似文献
8.
9.
很多功能零件从保证工作性能出发,其功能棱边不应有毛剌,且在去除毛刺后应保持一定的锐边。本文通过实验表明,采用磁力研磨法,适当控制工艺参数,可以实现这一要求。 相似文献
10.
11.
12.
New iron-based SiC spherical composite magnetic abrasive for magnetic abrasive finishing 总被引:1,自引:0,他引:1
SiC magnetic abrasive is used to polish surfaces of precise, complex parts which are hard, brittle and highly corrosion-resistant in magnetic abrasive finishing(MAF). Various techniques are employed to produce this magnetic abrasive, but few can meet production demands because they are usually time-consuming, complex with high cost, and the magnetic abrasives made by these techniques have irregular shape and low bonding strength that result in low processing efficiency and shorter service life. Therefore, an attempt is made by combining gas atomization and rapid solidification to fabricate a new iron-based SiC spherical composite magnetic abrasive. The experimental system to prepare this new magnetic abrasive is constructed according to the characteristics of gas atomization and rapid solidification process and the performance requirements of magnetic abrasive. The new iron-based SiC spherical composite magnetic abrasive is prepared successfully when the machining parameters and the composition proportion of the raw materials are controlled properly. Its morphology, microstructure, phase composition are characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD) analysis. The MAF tests on plate of mold steel S136 are carried out without grinding lubricant to assess the finishing performance and service life of this new SiC magnetic abrasive. The surface roughness(Ra) of the plate worked is rapidly reduced to 0.051 μm from an initial value of 0.372 μm within 5 min. The MAF test is carried on to find that the service life of this new SiC magnetic abrasive reaches to 155 min. The results indicate that this process presented is feasible to prepare the new SiC magnetic abrasive; and compared with previous magnetic abrasives, the new SiC spherical composite magnetic abrasive has excellent finishing performance, high processing efficiency and longer service life. The presented method to fabricate magnetic abrasive through gas atomization and rapid solidification presented can significantly improve the finishing performance and service life of magnetic abrasive, and provide a more practical approach for large-scale industrial production of magnetic abrasive. 相似文献
13.
磁力研磨作为一种新兴的表面光整技术,在细长管内壁研磨方面有着独特的优势,但目前市场上磁力研磨专用的数控机床设备较少。针对传统数控系统在小型机床上应用的缺陷,基于STM32+FreeRTOS实时操作系统设计了数控机床的嵌入式软硬件,建立了三层拓扑结构的软件系统。对主轴转速伺服控制进行了研究,通过系统辨识建立主轴数学模型,基于Ziegler-Nichols方法整定PID参数。以活检针为例进行了实际的磨削实验,试验结果表明,该机床磨削过程稳定、加工精度高。 相似文献
14.
介绍了永磁体的性能和种类,着重说明了"永磁王"钕铁硼在磁性研磨中作为磁源的科学性和可取性,并作了大量实验,取得了理想的效果。 相似文献
15.
In order to improve the finishing efficiency of the Magnetic Abrasive Finishing process, we proposed a new MAF process with renewable abrasive particles using compound magnetic finishing fluid circulatory system in this paper. This new finishing process has a circulating system that uses a conveyor belt to renew the mixed abrasive particles. This not only maintains the stability of the finishing but also ensures that the processing does not need to be interrupted. In this study, we investigated the magnetic field distribution, finishing force, and finishing behavior of the processing area. Furthermore, we designed experimental device to finish the sus304 stainless steel plate, to verify the feasibility of this process and understand its characteristics through processing experiments. Moreover, the influence of important process parameters, including magnetic particles, abrasive particles, conveyor belt line speed and working gap, on the surface quality of the workpiece is studied through the experiment. The experimental results indicate that the present process can achieve stable processing of the material surface without interruption, and the surface roughness of the sus304 stainless steel plate has been improved from 273 nm to 23 nm through this process. 相似文献
16.
17.
18.
19.
20.
针对空心球形复合超硬磨料的多微孔结构对磨削温度影响问题,研究了空心球形复合超硬磨料的结构,建立了空心球形磨料砂轮的磨削模型.从理论上分析了多微孔结构对砂轮的切削锋利度和携带冷却液能力的影响机制;运用温度测量系统,进行了陶瓷空心球形复合超硬磨料砂轮在不同磨削切深和不同冷却液供给量条件下的平面磨削温度实验研究,并分析了磨削温度随不同切深和冷却液供给量的变化趋势.研究结果表明,空心球形磨料砂轮的磨削温度明显低于传统超硬磨料砂轮,验证了空心球形磨料砂轮具有较锋利的切削刃和更好的携带冷却液能力,可有效降低磨削温度,是实现低温磨削的一种新途径. 相似文献