tailieunhanh - Cutting Tools P14

The broaching operation is similar to shaping with multiple teeth and is used to machine internal and external surfaces such as holes of circular, square, or irregular shapes, keyways, and teeth of internal gears. A broach is a long multitooth cutting tool with successively deeper cuts. Each tooth removes a predetermined amount of material in a predetermined location. The total depth of material removed in one path is the sum of the depth of cut of each tooth. Broaching is an important production process and can produce parts with very good surface finish and dimensional accuracy. Broaching. | CHAPTER 14 Metal Removal Cutting-Tool Materials Metal Removal Methods Machinability of Metals Broaches Single Point Machining Turning Tools and Operations Turning Methods and Machines Grooving and Threading Shaping and Planing and Broaching 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 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- Introduction The broaching operation is similar to shaping with multiple teeth and is used to machine internal and external surfaces such as holes of circular square or irregular shapes keyways and teeth of internal gears. A broach is a long multitooth cutting tool with successively deeper cuts. Each tooth removes a predetermined amount of material in a predetermined location. The total depth of material removed in one path is the sum of the depth of cut of each tooth. Broaching is an important pro FIGURE Typical broaching operation of an internal spline. Courtesy Detroit Broach Machine Co. duction process and can produce parts with very good surface finish and dimensional accuracy. Broaching competes favorably with other processes such as boring milling shaping and reaming. Although broaches tend to be expensive the cost is justified because of their use for high production runs. A two station broaching operation is shown in Figure . Broaching Tooling is the heart of any broaching process. The broaching tool is based on a concept unique to the process -

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