By Thomas Slattery, Arthur R Meyers
Indicates the reader how one can be certain speeds and feeds of metals in response to chemical compositions. Explains how one can pick out the suitable slicing instruments and their configurations. makes use of initiatives to demonstrate handbook and NC and CNC machining, permitting the reader to completely comprehend the basics. Discusses all grinding strategies and size criteria used.
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Extra resources for Basic Machining Reference Handbook
Readily made and kept for later use, a centering tool positions the toolbit in relation to a known location. The tool is positioned against that location, and the toolbit cutting edge is set to a ﬁxed point on the centering tool. Start the lathe. Lathe must turn counterclockwise (toward operator). Establish tool/work contact. Bring the tool up close to the workpiece surface as it is turning and “kiss” or touch lightly. Work may be faced from the center out or from side to center; either one is acceptable practice.
Gap-bed” lathes—ones with a removable bed section that permits turning work larger in diameter than the particular machine’s nominal swing—provide a way to get around this basic dimensional restriction. They were commonly used in the heyday of conventional machining to handle an occasional need to turn a workpiece that was larger than those typically machined at the shop, but are rarely used today because of the excessive time required for changeover. The “40” means that when (1) the tailstock is moved as far as it will go toward the end of the bed opposite the spindle and (2) a part is supported between a center mounted to the spindle and one mounted to T U R N I N G A N D T H E L AT H E : D E F I N I T I O N A N D H I S T O R Y 47 the tailstock, the length of the workpiece, when measured between the centers, will be 40 in.
Clamp the work in the vise as follows. a. Thin strips should be laid ﬂat. b. Short ends should be cut singly. c. Round stock should be held ﬂat on the table and clamped securely with the vise. Tubing should be held the same way. 5. If cutting on a sharp corner, a ﬁne-tooth blade should be used so teeth do not get stripped out as the blade enters the material being cut. 6. Just as in band sawing the number of teeth per inch is determined by the thickness of the material being cut. 7. Use a good-quality cutting ﬂuid when sawing to get the optimum results.
Basic Machining Reference Handbook by Thomas Slattery, Arthur R Meyers