Grooving, conditioning and micromechanics of grinding wheels

砂轮的开槽、修整和微机械

• 批准号: 217203-2013
• 负责人: Warkentin, Andrew
• 金额: $ 1.68万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570118
• 关键词: Grooving; conditioning; micromechanics; grinding; wheels

Grinding is a strategic manufacturing process; the Canadian aerospace, automotive, oil and gas, and forestry industries are all users of grinding technology. Virtually all parts made of hard materials that require fine surface finishes or tight tolerances are ground. One of the fundamental difficulties with conducting research in grinding is a lack of knowledge of the geometry of the cutting tool. A grinding wheel has a multitude of geometrically undefined cutting points which are irregularly distributed on its working surface and which are presented to the workpiece at random orientations. Prior to any grinding operation, the surface of a grinding wheel needs to be conditioned by cutting the wheel surface with a diamond tool in order to sharpen the grinding wheel and ensure that it has a circular cross-section. This operation modifies the number and the size of cutting edges on the grinding wheel and significantly affects the grinding process. Fine dressing conditions produce very smooth surfaces but also result in low energy efficiency with high forces, high power consumption and a high probability of workpiece damage, while coarse dressing conditions have the opposite effects. While the effects of wheel conditioning have been studied indirectly by measuring the workpiece surface roughness, grinding power, forces and temperatures, the link between the wheel surface topography and these outcomes has not been adequately quantified because a technology does not exist that can completely and accurately define all of the cutting edges on a grinding wheel. Thus, the first objective of the proposed research is to develop a measuring system that, for the first time, can completely map the entire surface of an industrial sized grinding wheel. This information will be used to improve the cost effectiveness and productivity of the grinding process in the same way that learning how tool geometry affects turning and milling has benefited those manufacturing processes. Next, a novel and inexpensive wheel conditioning technology called wheel grooving will be developed that can alter the surface of a grinding wheel in a selective manner and produce the desired surface roughness using less energy with higher material removal rates.

研磨是一个战略制造过程；加拿大航空航天，汽车，石油和天然气以及林业行业都是研磨技术的用户。 几乎所有由需要精细表面表面或紧密公差的硬材料制成的零件均为地面。 进行磨削研究的根本困难之一是缺乏对切割工具的几何形状的了解。 磨轮具有多种几何不确定的切割点，这些切割点不规则地分布在其工作表面上，并以随机方向显示给工件。 在进行任何研磨操作之前，需要用钻石工具切割车轮表面来调节磨削轮的表面，以锐化磨削轮并确保其具有圆形的横截面。 此操作修改了磨轮上切割边缘的数量和大小，并显着影响磨削过程。 良好的敷料条件会产生非常光滑的表面，但也会导致高力，高功耗和工件损害的高可能性，而粗糙的调味料则具有相反的影响。 尽管已经通过测量工件表面粗糙度，磨削功率和温度来间接研究了轮毂调节的效果，但车轮表面形象和这些结果之间的联系尚未得到充分量化，因为不存在一项技术可以完全且准确地定义磨削轮上的所有切割边缘。 因此，拟议的研究的第一个目标是开发一个测量系统，该系统首次可以完全绘制工业尺寸磨轮的整个表面。 这些信息将用于提高研磨过程的成本效益和生产力，就像学习工具几何影响转弯和铣削如何使这些制造过程受益一样。 接下来，将开发出一种称为车轮凹槽的新型且廉价的轮毂调理技术，可以选择性地改变磨轮的表面，并使用较小的能量和较高的材料去除速率产生所需的表面粗糙度。