Platinum Roller Hearth Furnace
e.g. for thermal treatment of metal parts for the automotive industry at approx. 950 °C. These parts undergo a thermal deformation in connected press.
Technical data
- Furnace designation:
- gas and electrically heated plate roller hearth furnace
- Rated furnace temperature:
- 950 °C
- Number of heating zones:
- 5
- Net output:
- 1.000 kg/h
- Cycle time:
- 20 sec
- Furnace dimensions:
- 3,800 x 2,300 x13,500 mm (w x h x l)
- Width of channel :
- 2.050 mm
- Protective gas:
- e.g. nitrogen N2
Purpose
The plate roller hearth furnace is used for thermal treatment of steel sheet plates for the automotive industry. These plates undergo a thermal deformation in a connected press. These warmly formed safety components considerably contribute to absorb the shocks on the car body.
Furnace Description
The roller hearth furnace is a continuous furnace with a production roller conveyor on which the steel sheet plates are heated up. The furnace enclosure consists of a U-shaped body with layed on cover. The furnace ceiling, the furnace walls and the furnace bottom are lined with ceramic fibre in form of sheets and mats as well as lightweight refractory brick. The furnace enclosure and the top cover are welded gas-tightly and are joint gas-tightly with an intermediate sealing.
The production roller conveyor is equipped with ceramic rollers and the roller drive system is divided into 4 segments. On this roller conveyor the steel sheet plates are run through the furnace and are heated up to the forming temperature. In front of the furnace inlet there is a roller inlet track on which two steel sheet plates each one after another are placed directly onto the rollers. Per quick entry the steel sheet plates are run into the furnace. After the throughput the steel sheet plates are run onto the roller outlet track at the furnace output per quick discharge. They are also centered at this place. From this exact defined position the unloading robot takes up the warm steel sheet plates and puts them into the press.
In order to avoid a strong oxydation (scaling) protective gas is inserted into the furnace by means of hazes at the furnace inlet and outlet and at further feeding positions. To the protective gas max. 5% combustible components can be added (e.g. 1 % CH4) in a mixer unit.
The complete control and regulation of the heating unit is programmed by a PLC which is also delivered by Ruhstrat. Apart from the heat treatment plants Ruhstrat offers its customers also the individually designed corresponding periphery equipments as handling, cooling, drive and transport systems, process control and protective gas and process gas equipments.
Advantages in heat forming plants, proved Ruhstrat roller hearth furnace concept
- maintenance free drive
- low-wear self-lubricating drive
- worn and broken ceramic rollers can be changed during operation
- gas-tight rollers drive by upright shaft and screw gears
- drive of each roller by screw gear
- negligible slipping in quick and revers operation
- gas-tight enclosure with good heat insulation
- gas steel tube burner and electrical heating can be combined for optimal temperature control
- With car body parts produced by Ruhstrat roller hearth furnaces drivers all over the world drive more safely.
