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Use safety practices in all machine and hand work operations
Assessment Strategies
Test, Skill demonstration in lab
Criteria
Pass safety test
Demonstrate safety procedures
Operate machines with all required guards in place
Maintain clean and organized work environment
Wear appropriate clothing and Personal Protective Equipment (PPE)
Explain proper lock-out tag-out procedures
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Develop and machine an electrode for EDM machining
Assessment Strategies
Skill demonstration in the lab
Using lab equipment selected by the student
When electrode is machined to the proper undersize to achieve blueprint specifications
On electrodes for dovetail project
Criteria
Select the appropriate electrode material
Complete electrode size worksheet
Generate the geometry and size necessary to produce the cavity detail
Machine finishing electrode to the blueprint specifications
Machine roughing electrode to blueprint specifications
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Setup a CNC EDM machine
Assessment Strategies
Select the appropriate electrode material
Complete electrode size worksheet
Generate the geometry and size necessary to produce the cavity detail
Machine finishing electrode to the blueprint specifications
Machine roughing electrode to blueprint specifications
Criteria
Choose proper workholding devices and rigidly mount workpiece to machine table
Activate proper screens to position electrode and workpiece
Execute centering or edge finding program
Tram workpiece to machine axes and set zero point
Select and load correct program and technology file
Attach flushing lines
Set flushing levels, pressure, and locations
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Program a CNC EDM machine
Assessment Strategies
In class programming assignment
With Makino graphite technology chart and handouts
With computer selected by student
On vise dovetail project
By 4th week of the semester
Criteria
Recognize and use preform commands in programming
Use both absolute and incremental positioning
Calculate frontal surface area of electrode
Use Makino worksheet to determine surface finish, number of electrodes, and rough settings
Use graphite technology chart to calculate generator settings and electrode undersize for both down and orb commands
Generate a complete program with multiple tool changes
Key in program on a computer with ASCII format or Makino control
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Operate a CNC EDM machine
Assessment Strategies
Skill demonstration in the lab
With the Makino CNC EDM and reference manual
Using the lab equipment selected by the student
Using fixturing provided
By verifying the size and depth of burn and adjusting if necessary to achieve blueprint specifications
On vise dovetail project
Criteria
Mount the workpiece to the fixture, and set fixture locations
Load electrodes into toolchanger and set tool length offsets
Load and activate correct technology file for the specific burn
Fill dielectric tank, set float level
Load and execute correct program from memory or thumb drive
Demonstrate file management techniques
Select the proper computer screens to monitor positions and burn progress
Adjust flushing to achieve maximum burn and safety
Activate correct screens and commands to change successive (multiple) tools
Activate correct screens to edit program file for multiple burn locations
Verify burn depth and diameters – adjusting if necessary to achieve blueprint specifications
Shut down machine after completion of program
Follow all safety practices – both general and specific to the CNC EDM
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Setup a CNC machining center
Assessment Strategies
Skill demonstration in the lab
With the Haas, Doosan, and Okuma CNC machining center and reference manual
Using lab equipment selected by student
On vise dovetail, R8, and indicator projects
Criteria
Use proper workholding devices and rigidly mount workpiece to machine table
Tram workpiece to machine axes and set zero point
Install tools into holders, and set fixture and tool length offsets
Select and load correct program
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Program a CNC machining center
Assessment Strategies
Skill demonstration in the lab
Using the Haas, Doosan, and Okuma CNC machines
On vise dovetail, R8, and indicator projects
When machined part or detail matches blueprint specifications
Criteria
Manually program part geometry
Use off-line programming software to draw the part geometry
Use off-line programming software to generate the tool path
Assign the proper tool for a specific operation
Choose the proper cutter entry and exit position/path
Select the appropriate tool change position
Edit part geometry and toolpath
Proof toolpath through back plotting
Assign a filename and post processes the file
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Operate a CNC machining center
Assessment Strategies
Skill demonstration in the lab
Using the Haas, Doosan, and Okuma CNC machines
On vise dovetail, R8, and indicator projects
When machined detail or part conforms to blueprint specifications
Criteria
Load correct program
Check program
Demonstrate file management techniques
Initiate cycle start and adjust feeds and speeds as necessary
Measure part as per blueprint specifications, and adjust tool lengths and offsets as required
Shut down machine properly
Follow all safety practices – both general and specific to the CNC machining center
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Use Cubic Boron Nitride and Diamond superabrasives for grinding
Assessment Strategies
Skill demonstration in the lab
Given a superabrasive grinding wheel, brake controlled truing device, and aluminum oxide dressing stick
With a surface grinder
On selected tool steels
Criteria
Pass superabrasive grinding test
Select and use the proper type of wheel for grinding on a variety of tool steels
Select the proper type of wheel for grinding on non-ferrous materials.
Mount a superabrasive grinding wheel on the grinder
Condition the grinding wheel using both trueing and dressing procedures
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Use advanced setups and procedures on manual vertical and horizontal milling machines
Assessment Strategies
Skill demonstration in the lab
With Bridgeport vertical mill
With horizontal mill
With the Machineries handbook and a calculator
Using cutting tool selected by the student
Using an offset boring head
On vise dovetail, R8, and indicator projects
Criteria
Choose proper workholding devices and rigidly mount workpiece to machine table
Edge find or tram workpiece to establish datum position
Select the proper size cutting tool for the application
Calculate the proper feed and speed for a variety of cutting tools
Parallel mill and square workpieces to blueprint specifications
Spot drill, drill, and ream holes to blueprint specifications
Center drill, drill, chamfer, and diameters to blueprint specifications
Bore hole locations and tap holes to blueprint specifications
Line bore hole locations and diameters to blue print specifications
Mill slots, pockets, angles, radii, and chamfers to blueprint specifications
Follow all safety practices – both general and specific to milling machines
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Use advanced setups and procedures on manual lathes
Assessment Strategies
Skill demonstration in the lab
With manual lathe
With Machineries handbook and calculator
Using cutting tools and holders selected by the student
On R8 and indicator projects
Criteria
Use proper workholding device to mount the workpiece to the machine spindle
Establish the datum or machining location
Select the proper cutting tool for the application
Calculate the correct feed and speed for all cutting tools
Turn diameters, shoulders, and angles to blueprint specification
Center drill, drill, chamfer, and tap holes to blueprint specifications
Spot drill, drill, and ream holes to blueprint specifications
Bore and counterbore hole diameters to blueprint specifications
Chase threads to blueprint specifications
Follow all safety practices – both general and specific to lathes
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Use advanced setups and procedures on surface grinders
Assessment Strategies
Skill demonstration in the lab
Using tools and equipment selected by the student
On the surface grinders
Using precision angle plates, magnetic sine chuck, and magnetic parallels
On vise dovetail and indicator projects
Criteria
Select the proper grinding wheel for a given application
Check and stone off magnetic chuck
Mount and dress the grinding wheel
Parallel grind and square workpiece to blueprint specifications
Properly remove grind stock relative to detail and hole locations
Set up magnetic sine chuck and grind angled surfaces both square and parallel to datum edges
Follow all safety practices – both general and specific to surface grinders
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Operate a CNC wire EDM
Assessment Strategies
Skill demonstration in the lab
Using the Makino wire EDM machine
On indicator holder project
When machined detail or part conforms to blueprint specifications
Criteria
activate the proper screens and load the correct program
Check program
Use Model Plan to create a technology file for roughing, and finish cuts
Activate proper CNC program, wire, and technology files
Check user and EDM parameters page
Activate graphics screen to plot wire geometry path on CNC control screen
Check info page to monitor burn process
Shut down machine properly
Follow all safety practices – both general and specific to the CNC wire EDM
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Verify accuracy of machining using dimensional metrology practices and equipment
Assessment Strategies
Skill demonstration in the lab
Using tools and equipment selected by the student
While part is still mounted to the machine
In the gage lab
On a surface plate
On vise dovetail, R8, and indicator projects
Criteria
Measure dimensional accuracy of the part on the machine using indicators, outside micrometers, depth micrometers, inside micrometers, calipers, telescoping gages, small hole gages, and mating parts
Measure dimensional accuracy of the part on a surface plate using indicators, gage blocks, height gages, sine bars, angle plates, plug gages, and cylindrical squares
Measure length, width, height, locations, sizes, and angles using a CMM
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Heat treats various tool steels using sound metallurgical practices
Assessment Strategies
Skill demonstration in the lab
With the manufacturers heat treating specifications chart
Using tempering and heat treating furnaces
Using tools and equipment selected by the student
Using a Rockwell hardness tester
On vise dovetail or special project
Criteria
Decipher the appropriate time to heat treat within a manufacturing sequence
Determine the correct temperature, length of time, and quenching medium for hardening the workpiece
Determine the temperature and soak time for the tempering process based on the desired Rockwell hardness
Perform visual inspection and Rockwell hardness test on the workpiece to determine heat treating success