ChipLabBLANK

ChipLabBLANK - Report ME-1800 Chip Lab Submitted By:...

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Report ME-1800 Chip Lab Submitted By: Submitted To: Professor Brown Submission Date: Section:
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1. Objectives The chip lab serves many goals at once but mainly it is meant to demonstrate key factors in machining parts and manufacturing in general. Some of its lesser goals include familiarizing oneself with the HAAS mills and lathes as well as CAD and CAM software. It also serves to teach valuable engineering techniques. These techniques include everything from performing precise, reproducible experiments, to learning the use of measuring instruments. The most important objectives of this lab are to do each of the following: 1.1 Calculate the shear angle and the apparent tool-chip friction coefficient from chip thickness measurements and plot to see if they vary with the feed. 1.2 Determine the power and plot how it varies as a function of feed – extrapolate to find the power at feed=0. 1.3 Compare the measured and calculated peak-to-valley roughness (Rt, a height-based texture characterization parameter) as a function of feed. 1.4 Observe the statistical variation of the chip thickness, feed and roughness and include it on the plots. 2. Methods 2.1 Procedure This experiment began with the generation of an Esprit file. The NC code from the file contained operations with a cleanup cut, and six cuts with varying feed rates. Once the code was generated, the tool and workpiece were loaded, probed and oriented. The code was then loaded onto a lathe, then run in graphics mode to ensure safety of the machine and integrity of the operations. Before operations began, the max load/power reading was reset to allow the recording of each operation’s power. The cuts were run individually, with a feed hold between each, in order to retrieve chips. 2.2 Measurement
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This note was uploaded on 04/07/2008 for the course ME 1800 taught by Professor Brown during the Fall '08 term at WPI.

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ChipLabBLANK - Report ME-1800 Chip Lab Submitted By:...

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