How are military aircraft types certified

Military aircraft

Worldwide leading manufacturers of military aircraft entrust Bodycote with their products. We always remember that our customers have invested a lot of time, money and resources in making their products. This is also where the quality of our services is based.

landing gear

The landing gear is one of the most important parts as the safety of the crew and passengers on every flight depends on the reliable operation of the landing gear. The type and location of these safety-critical components require high strength as well as high wear and corrosion resistance in order to meet the design requirements.

In order to achieve the required properties, different processes are combined with one another. First, the components are heat-treated in order to optimize the material properties so that the components can withstand the loads. This is followed by environmentally friendly coating processes, such as B. HVOF are used, which have largely replaced traditional coating methods with regard to wear and corrosion properties.

The scope includes:

  • Pivot and tilt pin
  • carrier
  • Hydraulic lines
  • Fasteners
  • Push rods
  • waves
  • Fasteners

Engine

Engine blades operate at high speeds and must withstand extreme temperatures. The parts are coated to protect against seizure, seizure and wear. The most commonly used heat treatment processes are stress relief annealing (after welding), solution annealing and quenching and tempering.

Turbine vanes direct the hot, expanding gases to the turbine vanes. Coatings are applied to protect the carrier material and to extend the service life. Frequently used heat treatment processes are stress-relieving annealing, annealing, solution annealing and quenching and tempering as well as brazing of helical screws and air chamber covers.

Honeycomb seals are primarily used to prevent gas leaks in different turbine stages. For this purpose, seals are placed with close tolerances in the stator (made of a honeycomb material) that is attached to the turbine housing. To connect the seal to the stator, a nickel alloy is applied and soldered in a vacuum. The scope includes:

  • Front bearing housing
  • Exhaust ducts
  • LP turbine blades
  • IP turbine blades
  • HP turbine blades
  • Turbine guide vanes
  • Aft fan housing
  • LPT stand
  • Compressor units
  • Drive shafts
  • Stub shafts
  • Seals
  • warehouse
  • Air ducts
  • Oil lines
  • Nozzle guide vanes
  • Blade segments
  • Blade rings
  • Turbine seal kits
  • Turbine blade seals
  • Shaft seals

Ejection seat

The ejection seat is a safety-critical component and is used in emergencies to safely catapult the occupants out of the aircraft. Heat treated rocket tubes are the main components of an ejector seat. These rocket tubes must absorb the forces that arise when an explosive charge detonates and redirect the released energy in the desired direction.

Hardening and tempering give the rocket tubes the strength they need to withstand these forces. The scope includes:

Airframe

The airframe includes all aircraft fuselage components including doors, wing spars, control surfaces, ailerons, transverse walls, longitudinal ribs and wings. These structural components are not only exposed to high forces during flight, but also have to withstand the loads during take-off and landing.

Corrosion-resistant materials are used for components that require high strength and durability. The use of aluminum or titanium is suitable for components that have to be strong yet light. Many titanium components are subjected to heat treatment in a vacuum furnace. Aluminum can be heat treated both in a vacuum and in a protective gas atmosphere. The scope includes:

  • Frame construction
  • Tailplane
  • Winglets
  • Fan duct
  • Side panels
  • Hinges
  • Engine nacelle
  • Engine suspension
  • Disguise
  • Door locks
  • Rivet heads