| Job Title |
Boring-machine Set-up Operator, Jig |
| Job Description |
Sets Up And Operates Jig Borer To Perform Machining
Operations, Such As Boring, Drilling, Reaming, And Counterboring
Holes In Metal Workpieces, Such As Jigs, Fixtures, Gauges, And
Dies, According To Specifications, Applying Knowledge Of Metal
Properties, Tooling, And Precision Machining: Studies Machining
Instructions, Such As Job Order, Blueprint, Process Sheet, Or
Layout On Workpiece To Determine Dimensional And Finish
Specifications, Sequence Of Operation, Setup, And Tooling
Requirements. Lifts Workpiece Either Manually Or With Hoist Onto
Machine Table. Positions And Secures Workpiece On Table With
Bolts, Clamps, Shims, Or Other Holding Devices, Using
Machinist's Handtools. Verifies Parallelism Of Reference Lines
On Workpiece To Axis Of Table Motion, Using Dial Indicator
Mounted In Spindle. Establishes Zero Reference Point On
Workpiece, Such As At Intersection Of Two Edges Or Over Hole
Location. Turns Handwheel To Adjust Machine Table To Align
Spindle Over Point, Using Dial Indicator. Sets Table-position
Dial At Zero; Measures All Machining Locations From This Zero
Point. Selects And Sets Cutting Speeds, Feed Rates, Depth Of
Cut, And Cutting Tool According To Machining Instructions Or
Knowledge Of Metal Properties. Installs Tool In Spindle. Turns
Handwheels To Lower Tool To Workpiece And Engages Automatic
Feed. Turns Valve And Directs Flow Of Coolant Or Cutting Oil
Over Cutting Area. Verifies Location And Dimensions Of Holes,
Using Measuring Instruments, Such As Dial Indicator, Gauge
Blocks, Telescoping Gauge And Internal Micrometer. Works To
Tolerances As Close As Plus Or Minus 0.0001 Inch. May Work Only
From Blueprint. May Lay Out Reference Lines And Machining
Locations On Workpiece, According To Blueprint, Using Layout
Tools, Such As Rule, Divider, And Scriber, Applying Knowledge Of
Shop Mathematics And Layout Techniques. May Fasten Workpiece In
Holding Fixture Mounted On Machine Table Or Clamp Jig Or
Template In Position On Workpiece. May Operate Machine Manually
Throughout First Piece Operation To Verify Accuracy Of Setup.
May Sharpen Tools On Bench Grinder.
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