back to overview
Cockpit
What is drilled?
- The window frames of the cockpit
What is Lübbering's solution?
- L.ADU locking system C-Frame (CF)
- The Frame is called C-Frame because of its form and it is available in different sizes
back to overview
Wing assembly
What is drilled?
- A wing consists of a front spar, a mid spar and a rear spar
- Cleats are used to connect the stringers with the rib. Thus, the wing gets stabilized
- Skin to rib
What are the difficulties?
- Because of the heavily accessible places a hand-operating L.ADU is needed
- Cleats have piloted holes for much easier positioning of the drilling unit
- Skin to rib: critical access – manhole area
What is Lübbering's solution?
- One-shot drilling and countersinking
- With L.ADU pneumatic Concentric Collet (CC) and L.ADU pneumatic Twist Lock (TL) it is easy to drill holes through the front spars, mid spars and rear spars
- With L.ADU pneumatic C-Frame (CF) it is easy to drill holes through the piloted hole of the cleat into the rib
- For the skin to rib application we recommend the L.ADU pneumatic HS 60 (High-Speed) with delta traverse unit and reaction arm
back to overview
Pre-FAL (section assembly)
What is drilled?
- Assembly of all sections of the fuselage
What is Lübbering's solution?
- L.ADU pneumatic Concentric Collet (CC)
- No gaps between thin material layers (stacks) due to high clamping force
- Nose pieces in full surface contact with component guarantees nearly 100% extraction of chips and dust
- Highly effective in dust / chip extraction and countersinking due to full surface contact
back to overview
Gear rib assembly
What is drilled?
- For the gear rib assembly, it is necassary to drill holes through the subfloor of the fuselage
- After that the gear rib can be assembled
What is Lübbering's solution?
- L.ADU electronic 520 with L.ADU locking system Taperlock (TPL)
- 1st step: 1“ pre-drilling and 1“ ream and countersinking
- 2st step: bolts are sticked into the drilled holes and after that cap nuts are sticked onto it
- The large arm of the fastening tool is needed, because one is not able to hold the cap nut with his own hands and the air plane doesn‘t get damaged
back to overview
Engine pylon
What is drilled?
- For the engine assembly, it is necassary to drill holes through the junction under the wing
What is Lübbering's solution?
- L.ADU electronic 520 with L.ADU locking system Twist Lock (inline and right-angled version)
- Adaptive Drilling Performance: automatic spindle speed adjustment due to automatic material detection of stacks
- Significant reduction of drilling cycle times through cutter breakthrough sensor
back to overview
Final wing assembly(FAL)
What is drilled?
- The wings are finally assembled onto the fuselage
- To put in the screw connectors, it is necessary to drill the corresponding holes
What is Lübbering's solution?
- L.ADU pneumatic Taperlock (TPL)
- Designed for larger holes
- Can take a high feed force
- One-shot drilling and countersinking: due to the contact between nose piece and surface, it can countersink
back to overview
Fuselage outer structure
What is drilled?
- Longitudinal seams
What is Lübbering's solution?
- L.ADU pneumatic Vacuum Traverse (VT) and L.ADU pneumatic HS 60 (High speed)
- Through locking onto the surface via vacuum pads, the drilling machines enable precise drill holes and a secure handling
- Easy positioning through either a pilot cutter, a pilot target or a cheap and simple strip template
back to overview
Fuselage inner structure
What is drilled?
- Pre-shell assembly
- Spar joints assembly
- Floor grid assembly
- Seat rails assembly
What are the difficulties?
- A high clamping force is necessary to drill precise holes through the shell
- A very tight access to the floor grid
- A lot of individual components and series
What is Lübbering's solution?
- Pre-shell assembly: L.ADU pneumatic Concentric Collet (type 55) ensures a high clamping force for all drilling operations
- Floor grid: L.ADU pneumatic Geared Offset (GO) for very tight accesses
back to overview
Door surrounding
What is drilled?
What is Lübbering's solution?
- L.ADU pneumatic Vacuum Traverse (VT)
- Locks onto the surface via vacuum pads
- Easy positioning through either a pilot cutter, a pilot target or a cheap and simple strip template
back to overviewersicht
Vertical/horizontal tail plane
What is drilled?
- Drilling holes through the rear fuselage to assemble the Horizontal Tail Plane (HTP) and Vertical Tail Plane (VTP)
What is Lübbering's solution?
- L.ADU pneumatic Concentric Collet (CC)
- No gaps between thin material layers (stacks) due to high clamping force
- Nose pieces in full surface contact with component guarantees nearly 100% extraction of chips and dust
- Highly effective in dust / chip extraction and countersinking due to full surface contact