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数量:11 (6)DOI: DOI: 10.37532 / 2319 - 9822.2022.11 .218 (6)

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通过发送磁场,创建灵活的磁粒研磨过程

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斯科特·戈麦斯主编,《太空探索,尼日利亚电子邮件:spaceexploration@scholarres.org

文摘

非常规加工方法之一,磁粒研磨(加),提供了一个高度的表面质量和本质上是由磁场。在加,工件之间保持N和S磁铁的两极。磁性磨料粒子分散在整个工作空间和工件之间的磁铁。因为磁场的影响在工作差距,磁性磨料刷(MAFB)创建灵活和功能多点刀具。为了确定过程参数对表面质量的影响,本研究调查理论上平面加过程。使用一个有限元模型,模拟磁场。薄片的表面将成为磨料由于磁性磨料粒子在磁场下的持续运动。1毫米厚的铜表都用于实验。电流(0.25,0.5,0.75),coil-turning速度(测量磁性磨料粒子的速度运动)(20、30和40 mm / s),实验特点和流程持续时间(1、2和3小时)。研究进行了自由和棉被。 The outcomes indicate that it is simple to concurrently produce various surface roughness patterns in various directions when applying a transmission magnetic field in the MAF (TMAF). While the surface roughness of the L-shaped object is about 0.9 m in one portion of the object where the electric current is 0.25A, it is approximately 0.55 m in the other section where the electric current is 0.75A. In the meanwhile, TMAF enables the finishing of a free-form surface without the use of specific fittings. Additionally, there is an immediate correlation between the change in surface roughness, the electric current, and the processing time.

关键字

电磁铁磁场,磨料粒子

介绍

美国和俄罗斯的研究人员开发出磁抛光(加)方法。加过程使用磁场和磁性磨料粒子波兰金属大量非传统的方式。采用磁场加过程中推动磨料粒子在目标表面;这些磁性磨料粒子也可能移动工件表面而被绑定到它的磁场。加器过程中使用的刀具是由铁和磨料颗粒。此外,可以保留磨料粒子通过结合微量的金属加工液,如蒸馏水或煤油,增加润滑和冷却组件。机器工具,磨料粒子,介质组成,工艺参数必须使用加方法。根据工件的几何图形,传统的生产设备,如车床和米尔斯已经使用在许多不同的研究,我们的过程。加,几个变量是至关重要的。大量研究表明,磁场有很强的对加工过程的影响。 In addition, the voltage (DC) applied to the electromagnet (in non-permanent magnets), the working gap, the magnet's rotational speed, and the size of the abrasive (mesh number) all have a significant impact on the MAF process. In some applications, such as finishing the inside of tubes and free-form surfaces, the MAF offers special promise since it can do without the drawbacks of conventional finishing techniques. Finishing the inside of the tubes is one of the MAF technique's primary uses. The performance of a system is significantly impacted by the interior roughness of tubes, yet using the traditional finishing procedure, it is challenging to reduce their surface roughness. The MAF system, meanwhile, may be utilised to effectively achieve superior surface quality. The MAF approach has a number of restrictions. Utilizing specialised equipment to reposition the magnetics places limitations on MAF and is seen as one of its drawbacks. The versatility of this technology is diminished when traditional machine tools (lathe and milling) are used. To make this approach more flexible, a new MAF technique is created in the present research. This theory's main tenet is that magnetic abrasive particles track the transmission of magnetic fields (similar a magnetic train moving on a magnetic rail). According to the technique's basic idea (as depicted in Figure 1), a magnetic field generated by electromagnetic coils that are arranged in a specific way beneath a thin sheet transmits from one coil to another. The coils are first prepared before being mounted in multiple rows beneath the workpiece on the insulating surface. Coils are turned on or off by an electrical circuit based on the finishing pattern (the current of each coil be controlled individually). It is not required to alter the physical layout of coils in order to make utilising them quicker. The coils are then turned on and off by an electrical circuit, which causes the magnetic field to flow in a specific direction (depending on coil configuration). After then, the magnetic force (created by a unique coil arrangement) directs the movement of the abrasive particle and polishes the workpieces' surfaces. For effective and precise finishing of interior and flat surfaces, the magnetic abrasive finishing (MAF) technology has recently been developed. This procedure can result in a surface polish of only a few nanometers. Additionally, MAF has a number of appealing benefits, including self-sharpening, controllability, flexibility, and the finishing tool doesn't need dressing or compensating.

结论

实验结果表明TMAF治疗大大改变了表面形态的盘子。TMF过程后的表面形态发生了变化,根据原子力显微镜(AFM)的照片。表面形态改善的过程时间延长。它还演示了如何表面形态改善线圈的电流增加。