Date post: | 22-Jan-2016 |
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Lathe Boring
Machining process to finish existing holes to exact size (rough cast holes or previously machined)
Assures accuracy of hole location (concentricity)
Produces smooth finish requiring little or no further machining
Can produce tapered holes
Boreing tool
Tool location at or just above center line. Produces finer finish
Bore diameter controlled by cross feed movement
Compound is “locked”
Tool design and machining requirements
Small nose radius Cutting tool doesnt rub part below cutting edge Bar as large and rigid as possible Minimum tool overhang As heavy a cut as possible
Rough and Finish
Roughing – quickly removes excess metal, leaving coarse finish
Finishing – lighter cuts and slower feed rate, gives better surface finish and accurate bore
Feed direction
Feeding in – Roughing work, 'loads' the tool. Heavier cuts
Feeding out – lighter cuts. Reduces tool spring
This evening:
Boring operation in aluminum.
Inspection using transfer measurement and calipers.