SKCN 285W - Computer Numerical Control CapstoneCredits: 4
Demonstrates application-based activities that tie together a majority of your previous manufacturing learning. Incorporates skills learned in drafting, CAD, manual and CNC machine tools, and CAM to complete the capstone project. Applies critical thinking and spatial analysis abilities in the processing of this project. Applies the fundamentals of tool design and tool making, fixture building, and geometric dimensioning and tolerancing (GD&T). Credit may be earned in CNC 285W or SKCN 285W but not both.
Prerequisite(s): SKCN 216 , SKCN 225 , and SKCN 260 or permission of instructor
Corequisite(s): None
Lecture Hours: 30 Lab Hours: 60
Meets MTA Requirement: None
Pass/NoCredit: No
Outcomes and Objectives 1. Practice safe working habits.
A. Identify proper work attire and personal protection items.
B. Demonstrate safe work habits when operating equipment.
2. Use reading and writing skills to gather information from technical texts.
A. Complete assignments by gathering information from reading.
B. Use reading strategies to disseminate and organize information.
C. Create a notebook as an essential reference.
D. Record sufficient notes from which to work independently.
3. Select order of operations given part blank dimensions.
A. Select order of operations given part blank dimensions.
1. End Milling
2. Face Milling
3. Pocket Milling
4. Contouring
5. Center Drilling
6. Drilling
7. Reaming
8. Bolt Circle Cycle
9. Chamfering
10. Tapping
11. Dowling
12. Facing
13. Back-facing
14. Turning
15. Back-turning
16. Boring
17. Back-boring
18. Counter boring
19. Countersinking
20. Trepanning
21. OD/ID Tapers, Contouring, Necking
22. Indexing
23. Timing
24. Spline Machining
4. Compute spindle speed for optimum performance.
A. Find the cutting speed range of the given material in a reference chart or book.
B. Measure rotary tool diameter.
C. Measure stationary tool nose radius.
D. Manipulate RPM formula.
5. Calculate feed rates for maximum feed per revolution or feed per minute.
A. Find the feed per tooth of a given tool geometry in a reference chart or book for a given material.
B. Find the feed per revolution of a given tool geometry in a reference chart or book for a given material.
C. Count the number of teeth on the rotary tool.
D. Select and manipulate the appropriate formulae.
6. Optimize speeds and feeds for given horsepower of the machine tool.
A. Compute the horsepower on a given machine.
B. Compute the maximum RPM on a given machine.
C. Compute the maximum inch per minute coordinated feed rate of a given machine.
D. Manipulate the horsepower formula.
7. Calculate feed rates to attain part print surface finish requirement(s).
A. Measure rotary tool diameter.
B. Measure stationary tool nose radius.
C. Count the number of teeth on the rotary tool.
D. Manipulate surface finish formulae.
8. Use a computer, current operating system, and word processing software.
A. Start and exit software as required.
B. Name files and the file extension as prescribed.
C. Demonstrate the correct handling and operation of storage media.
D. Format portable storage media as prescribed.
E. Demonstrate proper file management and backup procedures.
F. Use the word processing software for all written assignments.
G. Create part prints using available computer assisted design software.
H. Design ID tool using available CAD software.
I. Design trepanning tool using available CAD software.
J. Design two milling fixtures using available CAD software.
K. Convert CAD data into format recognized by the available CAM software.
L. Import CAD files into the CAM software.
M. Set up tool libraries in order to perform the above operations within print tolerances.
N. Generate a tool path to perform the above operations.
O. Obtain a part printout from the printer.
P. Obtain a tool path printout from the printer.
Q. Post-process a computer generated program into a usable and proper machinery language format for a particular control in the lab.
R. Verify the post-processed program is 100% accurate.
S. Obtain the machine program printout from the printer.
9. Down-load/up-load part programs to/from the control.
A. Operate the given communication software on the CNC machine tool.
B. Operate the given communication software on the computer.
C. Open the line of communication between the CNC machine tool and the computer.
D. Transmit the program.
E. Verify transmission has occurred.
F. Close the line of communication between the CNC machine tool and the computer.
G. Demonstrate that the program works correctly using:
1. graphics display, or
2. dry run feature.
10: Operate a manual lathe, mill, vertical band saw, horizontal band saw, and oxy-acetylene torch.
A. Cut all stock to length using a horizontal band saw.
B. Manufacture ID tool.
C. Manufacture trepanning tool.
D. Manufacture fixture(s).
E. Heat treat cutting tools.
11. Locate the work piece in the work holding device for the turning center.
A. Assemble work holding device.
B. Align work holding device for trueness.
C. Secure work piece using appropriate hardware.
D. Establish and set work piece zero.
12. Locate the work piece in the work holding device for the machining center.
A. Assemble work holding device.
B. Align work holding device for trueness.
C. Secure work piece using appropriate hardware.
D. Determine and set fixture offset.
E. Determine and set work piece zero.
13. Prepare the cutting tools required on the machining and turning center to perform the necessary operations.
A. Prepare the cutting tools required on the machining and turning center to perform the
necessary (following, but not limited to) operations:
1. End, face and pocket milling
2. Contouring
3. Drilling and center drilling
4. Reaming
5. Bolt circle cycle
6. Chamfering
7. Tapping, dowling/facing and back-facing
8. Turning and back-turning
9. Boring, back-boring and counter-boring
10. Countersinking
11. Trepanning
12. OD/ID tapers
13. Contouring and necking
14. Indexing
15. Timing
16. Spline machining.
B. Measure and record each tool's geometry.
C. Enter tool geometry.
14. Measure and record each tool’s geometry.
A. Measure and record coolant level.
B. Measure and record lubrication oil level.
C. Measure and record lubrication oil pressure.
D. Measure and record hydraulic oil level.
E. Measure and record hydraulic oil pressure.
F. Measure and record air pressure.
15. Demonstrate productive interaction with others.
A. Practice citizenship by respecting each person’s computer files as their personal property.
B. Ask and respond to questions during drawing demonstrations.
C. Display willingness to help classmates.
D. Demonstrate employability, interpersonal, teamwork, and leadership skills necessary to function in a multicultural business setting.
E. Use effective listening skills during classroom demonstrations.
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