By Steven Liang, Albert J. Shih
This publication offers readers with the elemental, analytical, and quantitative wisdom of machining method making plans and optimization in keeping with complex and functional realizing of equipment, mechanics, accuracy, dynamics, tracking suggestions, and keep an eye on concepts that they should figuring out machining and computing device instruments. it truly is written for first-year graduate scholars in mechanical engineering, and can be acceptable to be used as a reference ebook by way of working towards engineers. It covers issues equivalent to unmarried and a number of aspect slicing methods; grinding tactics; desktop device parts, accuracy, and metrology; shear pressure in slicing, slicing temperature and thermal research, and desktop instrument chatter. the second one component 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 sensible difficulties that engineers are inclined to face within the box are integrated, besides recommendations and motives that foster a didactic studying event.
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Additional resources for Analysis of Machining and Machine Tools
Holes made by drilling are often used for mechanical fasteners such as bolts or rivets. Drilling is a preliminary step for processes like tapping, boring, or reaming, and it is the machining process most frequently used on composite materials. The most familiar way of drilling is done with a rotating tool that is fed into a stationary workpiece. However, the workpiece may rotate while the drill remains fixed. Of the drills used, the multiflute twist drill is the most common. The flutes on a twist drill are helical (formed by twisting, hence the name) and are not designed for cutting, as was the case for the helix on an end mill.
3 Surface Grinding 51 θ Ds/2 aw ac,max f ac,max vtrav Chip cross section Length of chip lc Fig. 14) Vo = aw ac, max lc , 4 where aw is the average width of the chip and ac , max is the maximum undeformed chip thickness, and they can be related by a grain aspect ratio rg as a rg = w . 16) where vt is the surface speed of the wheel and C g is the number of actively cutting grains per unit area on the wheel surface. 17) 10 π d g 10d g2 4 where d g is the average grit diameter which is often agreed upon as 60 % of the wire spacing that determines the grit size.
Co lum Cross-rail Tool heads Wo rkp Worktable Base Fig. 9 Machining of a flat surface on a planer iec e n 22 2 Single-Point Cutting Processes Homework 1. A 2024-T4 aluminum cylinder of 64 mm diameter is turned on a lathe to reduce its diameter by 5 mm. The length to be machined on the cylinder is 105 mm. 68 hp; note that 1 hp = 745 W) available at the spindle and the HSS cutter has a major cutting-edge angle of 70° and a minor cutting-edge angle of 6°. Suppose the operation is to be done in one pass while a smooth surface with Ra less than 5 µm is desired, what should be the spindle speed and how much machining time would require?