Analysis of Machining and Machine Tools by Steven Liang, Albert J. Shih

By Steven Liang, Albert J. Shih

This publication offers readers with the basic, analytical, and quantitative wisdom of machining strategy making plans and optimization in line with complicated and functional realizing of equipment, mechanics, accuracy, dynamics, tracking recommendations, and keep an eye on suggestions that they should knowing machining and laptop instruments. it's written for first-year graduate scholars in mechanical engineering, and can be applicable to be used as a reference booklet by way of working towards engineers. It covers subject matters equivalent to unmarried and a number of aspect slicing techniques; grinding tactics; computer device elements, accuracy, and metrology; shear tension in slicing, slicing temperature and thermal research, and desktop software chatter. the second one portion of the booklet is dedicated to “Non-Traditional Machining,” the place readers can locate chapters on electric discharge machining, electrochemical machining, laser and electron beam machining, and biomedical machining. Examples of reasonable difficulties that engineers are inclined to face within the box are integrated, besides strategies and motives that foster a didactic studying event.

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Assume that the maximum cutting power is twice the average cutting power. There is no need to use safety factor of any sort in your calculation. Peripheral end milling of cast iron workpiece with an inside corner, a straight section, and an outside corner are shown in the figure. This will be done on a CNC machine tool where the programmed feed rate is 4 mm/s and the rotational speed is programmed at N = 180 rev/min. (a) For the straight sections of this cut, estimate the average chip thickness, the MRR, and power; (b) repeat the above for the inside corner section; (c) repeat the above for the outside corner section; and (d) based on your calculations, what is an appropriate way to program the CNC machine tool path to keep the power consumption constant when making corners?

However, chip removal is easier and it is usually easier to work on larger complex parts. There is also less restriction on vertical height of the workpiece. There are also “universal” machines with heads that can be rotated so the machining is done either horizontally or vertically. This provides machine versatility, but adds cost and another source of head-positioning error. 3. 4. 1 Milling Machine and Milling Process 27 Fig. 3 Geometry of a face mill Radial Rake Angle D Peripheral Clearance Angle Axial Rake Angle Lead or Corner Angle Face Clearance Angle Fig.

For the same amount of MRR, a longer chip implies a smaller chip thickness, therefore, a smoother surface with less scalloping. However, in up milling the workpiece tends to be lifted due to the existence of an upward cutting force component; thus, the machine structure is more likely to be unstable. Cutting temperature is usually higher and a cutter usually lasts shorter in up milling. 7 represents a cross section along the cutterʼs path, and the chip contact length in end milling. 11) lc = D , 2 in which Dq is the range of angular engagement determined from  a  ∆q = cos−1 1− .

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