By Steven Liang, Albert J. Shih
This booklet offers readers with the elemental, analytical, and quantitative wisdom of machining procedure making plans and optimization in accordance with complicated and sensible knowing of equipment, mechanics, accuracy, dynamics, tracking innovations, and keep watch over suggestions that they should realizing machining and computing device instruments. it truly is written for first-year graduate scholars in mechanical engineering, and can also be applicable to be used as a reference e-book through training engineers. It covers issues similar to unmarried and a number of element slicing procedures; grinding strategies; computing device device parts, accuracy, and metrology; shear pressure in slicing, slicing temperature and thermal research, and laptop software chatter. the second one component of the publication 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 life like difficulties that engineers are inclined to face within the box are incorporated, in addition to recommendations and causes that foster a didactic studying event.
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Extra resources for Analysis of Machining and Machine Tools
1 Face milling 3 Multiple Point Cutting Processes Primary motion Tool Machined surface Continuous feed motion Fig. 2 End milling e iec Work surface p ork W Machined surface Tool Primary motion Continuous feed motion ce pie rk Wo Work surface of operation may be lower because less power is required for axis motion on the table plane. Mounting of the larger workpiece is easier and it is easier to achieve accuracy because of the rigidly mounted workpiece. It is also better for the platetype workpiece.
Example A stainless steel was plunge ground with an 8 in. diameter silicon carbide bonded abrasive wheel of fine grain and medium density. 3 × 103 in. 25 ipm, and it was felt that the wheel hardness in this application is appropriate. Suppose a 6 in. wheel of the same grain size and density is to be used and the new hardness should not be greater than the previous in accomplishing the same MRR, what should be the limitations on the new infeed and the new traverse speed? Solution ac2, max = = 4vtrav C g rg vt Z since vtrav = w fa p fDs a p C g rg vt 4Z w f = Ds 4Z w fDs3 a p C g rg π nt (since v t = π Ds nt ), where nt is the wheel rotational frequency.
5 to 2. The variable a is the radial depth of contact, N is the tool rotational speed, and Nt is the number of teeth. 5). 1 Milling Machine and Milling Process 29 In face milling, the theoretical surface profile, measured parallel to the feed rate and coincident with the cutter axis, is equivalent to the profile parallel to the axis of rotation in turning with f = sz , κ r = (π /2) − κ , and κ r′ = κ ′. 6) tan κ + cot κ ′ sz Ra = . 9) Ra ≈ z , for z ≤ R sin κ ′. 32 R 2 Again, these are theoretical roughness values based on kinematics.