Lecture 13a - Milling and Other Processes

Lecture 13a - Milling and Other Processes - Machining...

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ISE 2204 Introduction to Manufacturing Processes Dr. Jaime Camelio Machining Milling and Other Operations Lecture 13.a April 28 th , 2009 ISE 2204 Introduction to Manufacturing Processes Spring 2009 Topics to be discussed Milling Operations Milling Parameters Drilling and Tapping
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ISE 2204 Introduction to Manufacturing Processes Spring 2009 Milling Machines (a) Schematic illustration of a horizontal-spindle column-and-knee-type milling machine. (b) Schematic illustration of a vertical-spindle column- and-knee-type milling machine. Source: After G. Boothroyd. ISE 2204 Introduction to Manufacturing Processes Spring 2009 Typical Machined Parts by Milling Typical parts and shapes produced by the machining processes
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ISE 2204 Introduction to Manufacturing Processes Spring 2009 Conventional and Climb Milling (a) Illustration showing the difference between conventional milling and climb milling. (b) Slab-milling operation, showing depth of cut, d ; feed per tooth, f ; chip depth of cut, t c and workpiece speed, v . (c) Schematic illustration of cutter travel distance, l c , to reach full depth of cut. ISE 2204 Introduction to Manufacturing Processes Spring 2009 Face Milling Face-milling operation showing (a) action of an insert in face milling; (b) climb milling; (c) conventional milling; (d) dimensions in face milling. Terminology for a face-milling cutter. Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
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ISE 2204 Introduction to Manufacturing Processes Spring 2009 Cutting Mechanics The effect of lead angle on the undeformed chip thickness in face milling. Note that as the lead angle increases, the undeformed chip thickness (and hence the thickness of the chip) decreases, but the length of contact (and hence the width of the chip) increases. Note that the insert must be sufficiently large to accommodate the increase in contact length. (a) Relative position of the cutter and the insert as it first engages the workpiece in face milling, (b) insert positions at entry and exit near the end of cut, and (c) examples of exit angles of the insert, showing desirable (positive or negative angle) and undesirable (zero angle) positions. In all figures, the cutter spindle is perpendicular to the page.
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Lecture 13a - Milling and Other Processes - Machining...

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