By Arthur Meyers, Thomas Slattery
As a entire and easy-to-use hands-on resource, this booklet is meant to function a reminiscence jog for the skilled, in addition to a reference for programmers and others who won't do the machining yet do want to know precisely what is serious about acting a given machining step, a chain of steps, or a whole activity. closing actual to its unique process, the hot moment variation maintains to provide the foundations of uncomplicated machining, whereas summarizing the most important concerns concerned. Logically prepared, this time-tested reference starts off with these machining steps that almost all frequently commence the machining method and strikes during the easy machining operations. it's a must-have source for knowledgeable machinists; programmers; tooling, layout and construction engineers; and scholars.
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F. Check guide arms; should be as close to the work as possible. g. Check inserts for wear. 5. Cutting rate too slow. a. Increase feed pressure. b. Check pitch; a coarser pitch blade may be needed. c. If the proper pitch has already been selected, increase the band velocity. TROUBLE SHOOTING MACHINE PROBLEMS The following is a simplified description of the proper sequence of automatic operation. Horizontal Cut-Off Machines, 1. 2. 3. 4. 5. 6. 7. 8. 9. Machine is set up on “auto-cycle” and running.
And a distance-between centers (bed length) of 40 in. The “13” means the centerline of the spindle is located a little over 612 in. from the bed, thus permitting a workpiece up to 13 in. in diameter to turn about that centerline without touching the bed. “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.
As is true of every machining operation, the cutting tool is the determining factor in machine design. Consequently, the improvements in cutting tools (saw blades) contributed by new alloys and materials, as well as the advances in saw blade design that these foster, largely account for emergence of band machining as a modern machining method. These led to development of larger, heavier band machines that could take advantage of the newer tools. Hydraulics were added for greater tension of the band and for increased power for feeding the work into the tool.