Effects of drilling variables on burr properties
An investigation utilizing 303Se stainless steel, 17-4PH stainless steel, 1018 steel, and 6061-T6 aluminum was conducted to determine the influence of drilling variables in controlling burr size to minimize burr-removal cost and improve the quality and reliability of parts for small precision mechanisms. Burr thickness can be minimized by reducing feedrate and cutting velocity, and by using drills having high helix angles. High helix angles reduce burr thickness, length, and radius, while most other variables reduce only one of these properties. Radial-lip drills minimize burrs from 303Se stainless steel when large numbers of holes are drilled; this material stretches 10 percent before drill-breakthrough. Entrance burrs can be minimized by the use of subland drills at a greatly increased tool cost. Backup-rods used in cross-drilled holes may be difficult to remove and may scratch the hole walls.
- Research Organization:
- Bendix Corp., Kansas City, Mo. (USA)
- OSTI ID:
- 7347654
- Report Number(s):
- BDX-613-1502
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
COST
DRILLING
IRON ALLOYS
IRON BASE ALLOYS
MINIATURIZATION
STAINLESS STEEL-17-4PH
STAINLESS STEELS
STEELS
SURFACE PROPERTIES