SCF V-686s Heat Treatment Oven for Collins Aerospace

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Il Disgelo designed and built for Collins Aerospace, at the Microtecnica plant (Actuation Systems Italy division) in Brugherio (MB), a forced-air low-temperature heat treatment oven for the dehydrogenation and stress relieving of critical components used in aerospace actuation systems.

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Developed Solution

• SCF V-686s oven with vertical forced-air flow and finned armored heating elements for maximum heat exchange
• Stainless steel interior chamber, painted steel exterior panels with high-efficiency thermal insulation to minimize energy losses
• Dual side-channel air distribution system ensuring temperature uniformity across the entire usable volume
• Manually operated exhaust damper for air renewal, engineered not to interfere with thermal stability inside the test chamber
• Overhead bar support system for hanging components vertically, plus two removable AISI 304 shelves
• Provision for centralized data acquisition, compatible with connection to other ovens on site

Main Technical Data

• Usable volume: 686 litres (internal dimensions 1400H x 700W x 700D mm)
• Temperature range: +60°C to +300°C
• Temperature uniformity: ±10°C, compliant with the AMS 2750 aerospace pyrometry standard
• Installed power: 7 kW — Power supply: 400V three-phase + N + T
• Paperless graphic recorder with touch screen, internal/USB data storage, data export and network notifications
• Two digital temperature controllers (control + safety) with auto-tune algorithm
• Three type-N temperature probes: control, safety (on the air return grille) and a movable probe for uniformity testing
• Dedicated safety system: PLC-based temperature control, residual-current circuit breaker with shunt trip coil, manual-reset gas-expansion safety thermostat independent of the PLC
• CE marking, ACCREDIA calibration on three temperature points

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Result

The equipment passed the two-stage acceptance procedure required by Collins Aerospace's technical specification — a first acceptance test (TUS and SAT, verifying process temperature hold) at Il Disgelo's own facility, followed by a second on-site acceptance test at the Microtecnica plant in Brugherio upon completion of staff training. The oven is now fully operational in the Spool & Sleeve department, with scheduled calibration and maintenance in place.