Multi-Purpose Chamber Furnace Unit Multi-Purpose Chamber Furnace Unit The Universal Heat Treatment Plant The Universal Heat Treatment Plant AICHELIN Heat Treatment Systems (Beijing) Co. Ltd. 10 00 86 Beijing, China Phone (+86) (10) 8255 1421 Telefax (+86) (10) 8255 1020 [email protected] Standard-Line Individual-Line http://www.aichelin.com Subject to technical changes AICHELIN®, NOXMAT®, NITROC®, ENDOMAT®, FLEXICLEAN® are registered trademarks

AICHELIN Multi-Purpose Chamber Furnace Unit 1. Introduction During the last decades, AICHELIN Group has built far more than 1000 protective gas chamber furnaces and put them into operation. Most of these plants provide their service reliably this very day. This impressively proves the permanent high quality, reliability and economy of these plants. Due to the central meaning of this furnace type, it is being permanently developed and constantly held together with our customers on the highest state of the art. This has now resulted in the creation of three series, where each of them is optimally...

3. Design of a Multi-Purpose Chamber Furnace Units 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 • sho rt transport cycles from furnace into the oil bath: according to the furnace size, 15 - 20 sec.. • Tray transport device in cold vestibule • with implementation...

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 all required safety and monitoring devices...

4. Accessory equipment for Multi-Purpose Chamber Furnaces NE\W* noNtf UP 700 4.2 Chamber Furnace without protective Furnace temperature max. 500 °C • VKHLE electrically heated as tempering-, relieving and pre-heating furnace • VKHLG gas heated Furnace temperature max. 750 °C • KE electrically heated Furnace temperature max. 750 °C • Kes electrically heated with charge cooling device Optional: "NITROC®" - nitrocarburizing device

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)

• 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 storages

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

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 flange...

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 oil bath heating is carried out electrically by dipping heating elements. The oil circulation is reached by means of two oil circulation aggregates with two adjustable numbers of revolutions. Via oil guidance channels and oil guide plates, attached closely to the charge, a targeted, obligatory...

7. Chamber-Furnace Continuous and Continuous Double- 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 done by...