AerospaceIndustry - Frank Drucklufttechnik

Introduction
Self Colleting Tools
Our self colleting drills provide rapid cycle times
while producing quality holes and accurate
countersinks. With stroke capacity from 1 inch to 3
inches, power capacity from 0.85 hp to 2.0 hp, and
a full range of speeds, these self colleting tools are
ideal for drilling and countersinking aircraft skin.
Aluminum, laminates, and mixed stacks of aluminum
or laminate over titanium or steel are well suited to
the superb hole making capacity of these machines.
Operation
Workpiece Template
Skinclamp
1.Position and clamp
the drilling template
on the workpiece.
2.Drill the first hole by
conventional means.
Insert
Collet
Locate
Template
Boss
3.Insert the Collet into the first hole and locate the
Template Boss in the drilling template. Insure that
the Collet/Mandrell extends through the workpiece.
The drill/countersink cycle is automated,
maximizing productivity with single trigger control.
Each of these tools uses a variation of an expanding
collet to clamp or fixture in a tooling plate or to
clamp directly to he workpiece. This economizes
Template
Boss
and simplifies the fixturing
required to mont and locate
these tools.
In the case of the variable
spacing foot (also known as
the template foot), the
collet/mandrel is inserted into
a predetermined hole in the
workpiece. The template
4.Depress the trigger. Immediately, the Mandrel
is drawn back and the Collet locks the tool to
the work. Simultaneously, the motor starts
and the tool feeds forward to a positive stop.
The tool then retracts automatically and
returns to its starting position.
5.Release the trigger; the motor shuts off and
unclamping occurs.
6.Reposition the Boss and drill other holes
within the colleting Range.
7.Withdraw the Collet/Mandrell and insert into
a recently driled hole.
Repeat steps 3 through 6.
boss is inserted into
a template hole with
the boss face on the
workpiece. When the
the tool first clamps by expanding the collet on the
mandrel. The tool automatically feeds to a preset
depth, and then
automatically retracts.
After retracting, the tool
unclamps. Remaining in
the same clamping
location, the tool can
then be moved to the
next clamp location and
the process repeated.
In the case of the jig collet and concentric collet,
the expanding collet is co-axial with the tool spindle.
The tool feeds to a preset depth, then automatically
trigger is actuated, Standoff
Pad
Depth
Adjustment
C-Clamp
Foot
Doler P3 with Variable Spacing Foot
Motor Module
Variable
Spacing Foot
Mandrel Feed Rate
Adjustment
Collet
Foot Pad
(Adjust per curvature
of workpiece)
Straight Hole
Jig Collet Foot Tooling
Tapered Hole
Hole
Hole
dia.
dia.
Tooling Plate Stand-off
Workpiece 5° Taper
retracts. After retracting, the tool unclamps. The tool
is then moved to the next
location and the
process is repeated.
In addition to the
variable spacing foot,
concentric collet, and jig
collet foot, the C-clamp
configuration is also
available. This configuration is ideal for applications
near the edge of surfaces.
Fixture Plate
Fixture holes may overlap.
Minimum center distance=
0.75 of hole diameter
Fixture plate hole dia.=
Colleting dia. +0.003”/-0.000”
Fixture Plate thickness “T”
should equal the Collet length.
4-2 4-3
Jig Collet
Foot
Feed Rate
Adjustment
Workpiece
“T”
Collet
Length
Standoff
Concentric Collet Tooling
Doler P3 with Concentric Collet
Depth
Motor Module
Adjustment
Concentric Collet Foot
Actuator
Arm