MARINETTE DISPLAY Challenges
MARINETTE DISPLAY Challenges
Machine Shop Project
( Computer Numeric Control ) Marinette Campus Questions ? Please contact Pete Anderson at : Email : peter . anderson @ nwtc . edu Phone : 715-735-9361
TRADES & ENGINEERING TECHNOLOGIES
Marinette Campus student capacity : Minimum 2 , No Maximum
* This is a “ Display project ” and needs to be completed before the Marinette Trades Skills Competition and brought to NWTC to be judged . These projects can be dropped off at the Marinette Campus Welcome Center between the hours of 8:00 am and 4:00 pm , April 7 th to 10 th for these to be judged on Friday , April 11 th . ( Manual Machining ) Any metal , plastic , wood work piece or part which is machined on one or more types of manual / conventional machine tools ( milling machine , engine lathe , drill press ). ( Computer Numeric Control Machining ) Any metal , plastic , wood work piece or part which is drawn with any CAM ( Computer Aided Manufacturing ) software , or long-hand programmed with G & M code and then created on a CNC machine ( milling , turning , routing , waterjet , EDM ). All displays will be evaluated on tolerances , surface finish , and functionality , in addition to a display of the blueprint used for machining ( all submissions should have a blueprint ), additionally a CAM drawing with a print out of the machine code ( G & M code ) used for CNC parts . Tolerances :
• Fractional Dimensions = +/ - 1 / 64
• ( Two place decimals ) . XX = +/ - . 01
• ( Three place decimals ) . XXX = +/ - . 005
• Angles = +/ - 1 / 2 degree
Surface finish :
• Machined surface should be a 125 Ra or better
• No burrs or sharp edges present
Functionality considerations :
• Complexity of the part ( is the part or piece challenging )?
• Functionality of assembled parts ( does the part or piece serve a purpose )?
Documentation :
• All submissions should have a blueprint with dimensions and tolerances ( handdrawn sketch is acceptable )
• CNC Parts should have a CAM drawing and Gcode print out
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