CHAMBER FURNACE
20Pages

Heat Treatment Systems The Universal Heat Treatment Plant J Reliability at work [ Member of AICHELIN Group

For example: ■ gas carburizing - with direct quenching - with intermediate cooling - with charge cooling under protective gas ■ re-carburizing ■ carbonitriding ■ NITROC ® - nitrocarburizing ■ nitriding ■ hardening in oil or salt ■ normalizing ■ annealing ■ tempering When are Chamber Furnaces preferentially used? ■ for small and middle capacities ■ for different heat treatment procedures ■ for different kind of parts and high diversity of parts ■ at charge weights of appr. 150 - 1800 kg (even more in special cases) ■ if flexibility is required ■ for different production requirements

3. Design of a Multi-Purpose Chamber Furnace Unit 3.1 Quality features of the Multi-Purpose Chamber Furnace at AICHELIN ■ to reach heat treatments with high quality and economy ■ extremely good temperature uniformity (10 K) and accuracy, simple operation ■ fully automatic and reproducible heat treatment ■ high reliability of the production process with long life cycle ■ low energy and media consumption ■ low pollutant and noise emission ■ short transport cycles from furnace into the oil bath: according to the furnace size 15 - 20 sec. ■ Tray transport device in cold vestibule ■ with...

AICHELIN MULTI-PURPOSE CHAMBER FURNACE UNIT 3.3 Possible design types of the Multi Purpose Chamber Furnace Pre-Chamber Furnace [VKE(G)s] Continuous Chamber Furnace [DKE(G)s] Continuous Double-Chamber Furnace [2KDKE(G)s] 3.4 Constructive characteristics of the AICHELIN Chamber Furnace  constant insulation of the furnace chamber without apertures or channels thick, well-insulating, tight furnace door abundantly dimensioned oil bath with multi-level oil bath circulation, optimized in streaming modern measure-, switch and control unit for memory of automatic heat treatment procedures and with...

4.1 Chamber- and Stress Relieving Furnace without protective gas MEVJ-. r\ow to Furnace temperature max. 500 °C ■ VKHLE electrically heated as tempering-, relieving and pre-heating furnace ■ VKHLG gas heated as pre-heating furnace 4.2 Chamber Furnace without protective gas Furnace temperature max. 750 °C ■ KE electrically heated ■ KG gas heated 4.3 Chamber Furnace for protective gas Furnace temperature max. 750 °C ■ KEs electrically heated ■ KGs gas heated with charge cooling device Optional: "NITROC®" -nitrocarburizing device

AICHELIN MULTI-PURPOSE CHAMBER FURNACE UNIT 4.4 Chamber Retort Furnace Furnace temperature approx. 700 °C  KREs electrically heated with forced charge cooling device (cooling with nitrogen) for - nitrocarburizing - water-/steam oxidation - gas nitriding - annealing and tempering under nitrogen - bright annealing - deep cooling up to -120 °C KEKTE electrically heated KEKTD steam heated for high-quality washing processes in aqueous solutions - with dipping and spraying system - two washing liquid containers - drying device by vent condensor (optional)

4.6 FLEXICLEAN® -Chamber-Washing Machine EKFE electrically heated EKFD steam/hot water heated for high-quality washing processes in aqueous solutions (especially with neutral cleaners) with two washing liquid containers (option: third container) with vacuum boiling “Vacupearl”, spraying and flotation system and vacuum drying device 4.7 Charging- and Discharging Cart for one-sided or opposite designed layout Optional: lifting function for two-layer charge sto

AICHELIN MULTI-PURPOSE CHAMBER FURNACE UNIT 5. Exemples of Installations for Mulit-Purpose Chamber Furnaces 5.1 Chamber Furnace Line for agriculural machine gears, gas heated Tray 1100x600x600 mm (LxWxH), max. 650 kg gross 5.2 Chamber Furnace Line for gear parts, gas heated Tray 1300x700x800 mm (LxWxH), max. 1000 kg gross

5.3 Chamber Furnace Line for gear parts, gas heated Tray 1300x700x800 mm (LxWxH), max. 1000 kg gross 5.4 Chamber Furnace Line for salt bath hardening of ball bearing parts Tray 1500x900x800 mm (LxWxH), max. 1200 kg gross

AICHELIN MULTI-PURPOSE CHAMBER FURNACE UNIT 5.5 Continuous Chamber Furnace Line for gear parts, gas heated Tray 1500x900x1250 mm (LxWxH), max. 1800 kg gross

6. Technical description of the Pre-Chamber furnace Type VKE (G) s The Multi-Purpose Chamber Furnace consists of following components: 6.1 Furnace Chamber: The furnace chamber consists of a gas tight furnace housing and lining of high-quality insulating material. The ceramic hearth made of siliconcarbide bricks, possesses a large open space for the gas flow. The optional silicon carbide gas conduction muffle and the intensively working gas circulation aggregate ensure a continuous flow of the charge and an outstanding temperature uniformity. The gas circulator is very compact due to the...

AICHELIN MULTI-PURPOSE CHAMBER FURNACE UNIT Underneath the vestibule door, a supervised flame curtain device, automatically firing by piezo ignition is implemented. The flame curtain must be ignited, only then the outer door can open. The oil bath volume of the hardening container is 12 optimally adapted to the charges. The double-walled housing execution with oil detector safely avoids environmental-damaging oil leakages. The oil level in the hardening container can be supervised by a minimum-maximum indication. Oil cooling is done by means of heat exchangers (oil/water or oil/air). The...

7. Continuous Chamber and Continuous Double-Chamber Furnace Continuous Chamber Furnace [DKE(G)s] Continuous Double-Chamber Furnace [2KDKE(G)s] The furnace types are, regarding the components, essentially equal to the prechamber furnace. Charge transport takes place according to the continuous principle. With the continuous chamber furnace, the charge is pushed into the first chamber by the charging table. With the double chamber furnace, likewise from the charging table into the first chamber and afterwards into second (with slightly opened outer door). Charge transport into the oil bath is...

AICHELIN MULTI-PURPOSE CHAMBER FURNACE UNIT 8. Control system of a Multi-Purpose Chamber Furnace 8.1 Control: The control level is divided into 3 operation modes: setting mode manual mode  automatic mode   Automatic mode In this mode, the furnace is operated in normal production. After the first start, all movements of the furnace are executed in correct series ,and for optimising the time partially even in parallel. A full graphic operator panel is the central operation element of the furnace. It displays all limit switch conditions and the conditions of the sequencers. All continuously...