RuAviation

Automated feed drilling machines (AFDM), developed at the Irkutsk Aviation Plant, have undergone testing and are ready for operation. The tool has entirely replaced foreign equipment, the supply of which ceased in 2022 due to anti-Russian sanctions. Specialists considered the shortcomings of overseas models and developed a more advanced version. The new machines are scheduled to be introduced this summer for MC-21 assembly, according to the factory newspaper Irkutsk Aircraft Builder.

The main advantage of the import-substituted AFDMs is their lightness and compact dimensions; the tool’s weight has been reduced by using duralumin for the body. The design has been simplified, and more powerful motors have been installed. Another innovation is the controlled delivery of coolant.

“On foreign prototypes, coolant is delivered immediately upon switching on the AFDM, which is unnecessary until the drill reaches the stack-up. The fluid is ejected into the air,” explained tool engineer and process engineer Vladimir Olenikov from Department 546. “On our machines, the coolant delivery button can be activated slightly later, just before drilling commences, using a special valve that prevents fluid loss. It enters the manifold and flows through dedicated channels directly to the drill bit.”

The development of the AFDMs involved staff from Departments 536, 320, 318, and 311. They analysed feedback from shop floor workers and incorporated improvements into the technical specification. Nearly all parts for the new drilling machines are manufactured at the aviation plant itself, including the motor shroud, which is 3D printed. It not only protects the mechanism but also reduces noise.

AFDMs are used for hole preparation in the wing-to-fuselage joint area – one of the most complex assembly areas. This requires a compact and powerful tool. The AFDM development project was recognised as the best at IrAZ in 2024 for its contribution to production development.

Irkutsk drilling machines are three times cheaper than their Western counterparts, and the cutting tools are half the price. At the same time, the quality remains high. Testing has confirmed that the AFDMs provide the required bore finish and surface roughness.

Plans are in place to produce all AFDM variants to eliminate imports completely. This will ensure the uninterrupted operation of the teams in Shop 249 during MC-21 assembly and eliminate dependence on foreign suppliers.