By Arthur Meyers, Thomas Slattery
As a entire and easy-to-use hands-on resource, this publication 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 interested by acting a given machining step, a sequence of steps, or an entire activity. final precise to its unique process, the recent moment version maintains to provide the foundations of easy machining, whereas summarizing the main issues concerned. Logically prepared, this time-tested reference starts off with these machining steps that almost all frequently start the machining method and strikes in the course of the simple machining operations. it's a must-have source for skilled machinists; programmers; tooling, layout and creation engineers; and scholars.
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Even when the machine is manually operated or mechanically automated, computer calculations can help ensure proper settings. Consequently, the computer can be a bit help by reducing the time and effort necessary to achieve each of the objectives entailed in producing blanks. In addition, numerical control can reduce handling time, thereby reducing the cost of producing the part. Chapter 9 has an example of calculating cost-per-cut for a typical cut-off job [See pages 289–290]. This use of a computer helps ensure efﬁcient operation and provides reasonably accurate calculations of cost-per-cut.
Digital readouts. Each of these will be covered in speciﬁc discussion of operations where its use is critical or useful. 7. Taper turning attachment. 8. Steady rest, which is used to support heavy bars. 9. Follower rest, which is used to support long thin shafts. Otherwise, the shaft would bend due to the pressure exerted by the tool. ) FACING The basic purpose of facing is to square the ends or faces of workpieces with the axis of the work as it turns. Thus in facing, the workpiece is held ﬁrmly in ways that permit it to run true about its axis or centerline.
6). There are two areas where it is used extensively. The ﬁrst is for cut-off sawing of such nonferrous materials as aluminum and brass, and the other is for sawing both large-diameter rounds and thick, ﬂat stock in sections called plates. Cut-off of aluminum extrusions is fast, accurate, and practically burr-free. 6. Abrasive cut-off saw. C U T- O F F 29 There are two excellent reasons for the popularity of circular sawing. The ﬁrst is that it produces a ﬁne ﬁnish on the part (equivalent to a milled ﬁnish).