| Job Title |
Jig-boring Machine Operator, Numerical Control |
| Job Description |
Sets Up And Operates Numerically Controlled Jig-boring Machine
To Perform Machining Operations, Such As Boring, Drilling And
Counter-sinking Holes In Metal Workpieces According To
Specifications And Setup Instructions, Applying Knowledge Of
Metal Properties And Machining Methods: Studies Blueprints And
Setup Instructions To Determine Machining Required, Dimensional
Specifications, And Work Procedures And Methods. Installs
Work-holding Devices, Such As Blocks And Clamps On Indexing
Table Of Machine, Using Handtools. Lifts Workpiece Manually Or
With Hoist And Positions And Secures It On Machine Table Or In
Holding Device. Inserts Cutting Tool In Spindle Of Machine.
Inserts Punched Card Or Loads Perforated Or Magnetic Tape
Containing Programmed Instructions Into Reader Of Control Unit.
Pushes Button To Zero Indexing Table And Console At Established
Locating Point. Sets Conventional Cams, Stops, And Dial-type
Switches On Machine Head As Indicated On Setup Instructions If
Machine Spindle Is Not Under Numerical Control. Actuates Machine
That Automatically Positions Indexing Table Containing Workpiece
Under Spindle And Machines Part According To Programmed
Instructions. Inspects And Measures Dimensions Of Machined
Workpiece To Verify Conformance To Specifications And Shop
Standards, Using Precision Measuring Instruments, Such As
Precision Gauges, Dial Indicators, Micrometers, And Calipers.
Monitors Machine Operation And Display Panel Of Control Unit For
Indications Of Malfunctions. Notifies Supervisor If Machined
Workpiece Does Not Conform To Specifications Or If Machine
Malfunctions. May Make Manual Adjustments, Such As Setting
Cutting Speed, Feed Rate, And Depth Of Cut. May Operate Machine
In Semiautomatic Mode By Setting Selector Switch And Manually
Dialing In Data According To Oral Or Written Instructions To
Machine Relatively Simple Pieces. May Operate Machine As
Inspection Machine In Manner Similar To Normal Operations By
Inserting Precision Measuring Instrument In Spindle And Moving
Machine Through Cycle Under Automatic Or Manual Mode To Indicate
Deviations From Prescribed Tolerances.
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