Cooper Tools Quackenbush 158QGDAV Operations Instructions Page 103

  • Download
  • Add to my manuals
  • Print
  • Page
    / 137
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 102
103
Best Hole Quality
n Thru-the-cutter lubrication; High quality cutter lubricant
at manufacturer’s recommended rate.
n Drill geometry with split point, 2/4 drill / reamer flute design.
n Review benefits of peck and positive feed.
n For aluminum, use high speed with low feed rate.
n For titanium, steel, etc., use machining handbook rates
for initial trials.
n Verify adequate flow path for chips thru flutes, tool,
and fixture.
n Recondition cutters before cutting edge breaks or
excessive wear occurs.
n Maintain tool in very good condition.
n Test drill in coupon (sample material) before using in production.
n Personnel must be well-trained and competent
n "One Shot" operation is usually attainable, but requires
very close attention to details
n Verify Cutter quality, proper lubrication rate, replace Cutter before
becoming dull, replace Bushings and service tool regularly.
n "Two Shot" operation - drill followed by ream requires
less detailed attention.
n Two operations will produce virtually any hole specification.
General Drilling Recommendations
Composite Materials
These materials vary widely in fiber type, resin type
and manufacturing method. Cutter lubrication is always
beneficial but may not be permitted. Expermentation is
required to optimize drill geometry, speeds and cutter
material.
Stacks of Different Materials
Speeds and feedrates must be lowest and slowest of
materials in the stack. Peck Drilling is usually advanta-
geous.
Cutter Material
Micrograin Carbide is best for drilling / reaming titani-
um and carbon fiber. Can also be used for aluminum.
More holes per sharpening. M42 High Speed Steel is
recommended for drilling precision holes/countersinks
in aluminum.
Cutter Cost
Some cutter types cost much more than others. It is
best to compare cutter costs by the number of holes
generated per sharpening, production time, number of
operations required and quality of holes.
Reconditioning Cutters
Reconditioning is very difficult and tedious. Close
attention to detail is mandatory.
Cutters
Cutter Mounting Styles
Page view 102
1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 136 137

Comments to this Manuals

No comments