tailieunhanh - Cutting Tools Part 16

Tham khảo tài liệu 'cutting tools part 16', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | OỌỉSữA Upcoming Chapters Metal Removal Cutting-Tool Materials Metal Removal Methods Machinability of Metals Single Point Machining Turning Tools and Operations Turning Methods and Machines Grooving and Threading Shaping and Planing Hole Making Processes Drills and Drilling Operations Drilling Methods and Machines Boring Operations and Machines Reaming and Tapping Multi Point Machining Milling Cutters and Operations Milling Methods and Machines Broaches and Broaching Saws and Sawing Abrasive Processes Grinding Wheels and Operations Grinding Methods and Machines Lapping and Honing CHAPTER 16 Grinding Wheels and Operations Introduction Grinding or abrasive machining is the process of removing metal in the form of minute chips by the action of irregularly shaped abrasive particles. These particles may be in bonded wheels coated belts or simply loose. The abrasive grains usually cut with a zero to negative rake angle and produce a large number of short small curly or wavy chips. The way an abrasive grain cuts material is shown in Fig. George Schneider Jr. CMfgE Professor Emeritus Engineering Technology Lawrence Technological University Former Chairman Detroit Chapter ONE Society of Manufacturing Engineers Former President International Excutive Board Society of Carbide Tool Engineers Lawrence Prentice Hall- Grinding Wheels Grinding wheels are composed of thousands of small abrasive grains held together by a bonding material. Some typical grinding products are shown in Figure . Each abrasive grain is a cutting edge. As the grain passes over the workpiece it cuts a small chip leaving a smooth accurate surface. As each abrasive grain becomes dull it breaks away from the bonding material because of machining forces and exposes new sharp grains. Types of Abrasives Two types of abrasives are used in grinding wheels natural and manufactured. Except for diamonds manufactured abrasives have almost totally replaced .

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