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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >Ultra-precision face grinding with constant pressure, lapping kinematics, and SiC grinding wheels dressed with overlap factor
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Ultra-precision face grinding with constant pressure, lapping kinematics, and SiC grinding wheels dressed with overlap factor

机译：恒压超精密平面磨削，精研运动学和修整过的SiC砂轮

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摘要

Several machining processes have been created and improved in order to achieve the best results ever accomplished in hard and difficult to machine materials. Some of these abrasive manufacturing processes emerging on the science frontier can be defined as ultra-precision grinding. For finishing flat surfaces, researchers have been putting together the main advantages of traditional abrasive processes such as face grinding with constant pressure, fixed abrasives for two-body removal mechanism, total contact of the part with the tool, and lapping kinematics as well as some specific operations to keep grinding wheel sharpness and form. In the present work, both U (d)-lap grinding process and its machine tool were studied aiming nanometric finishing on flat metallic surfaces. Such hypothesis was investigated on AISI 420 stainless steel workpieces U (d)-lap ground with different values of overlap factor on dressing (U (d) = 1, 3, and 5) and grit sizes of conventional grinding wheels (silicon carbide (SiC) = #800, #600, and #300) applying a new machine tool especially designed and built for such finishing. The best results, obtained after 10 min of machining, were average surface roughness (Ra) of 1.92 nm, 1.19-mu m flatness deviation of 25.4-mm-diameter workpieces, and mirrored surface finishing. Given the surface quality achieved, the U (d)-lap grinding process can be included among the ultra-precision abrasive processes and, depending on the application, the chaining steps of grinding, lapping, and polishing can be replaced by the proposed abrasive process.
机译：为了获得有史以来最好的硬和难加工材料的加工效果，已经创建并改进了几种加工工艺。科学前沿出现的一些磨料制造工艺可以定义为超精密磨削。对于精加工平面，研究人员一直在收集传统磨料工艺的主要优点，例如恒压端面磨削，用于两体去除机制的固定磨料，零件与工具的完全接触以及精研运动学以及一些其他优点。具体操作要保持砂轮的锋利度和形状。在当前的工作中，研究了U（d）搭接研磨工艺及其机床，旨在在平坦的金属表面上进行纳米精加工。在AISI 420不锈钢工件U（d）搭接的地面上研究了这种假设，修整时重叠系数的不同值（U（d）= 1、3和5）和常规砂轮的粒度（碳化硅（SiC） ）=＃800，＃600和＃300）应用专门为这种精加工设计和制造的新机床。加工10分钟后获得的最佳结果是平均表面粗糙度（Ra）为1.92 nm，直径为25.4 mm的工件的平面度偏差为1.19μm，并进行了镜面抛光。考虑到所获得的表面质量，U（d）研磨工艺可以包括在超精密研磨工艺中，并且根据应用，可以用建议的研磨工艺代替研磨，精研和抛光的链接步骤。 。

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