Hot forming
The forging of steel parts is carried out in the temperature range from 1100°C – 1250°C. The bar stock is heated inductively to the suitable forging temperature, sheared in the Hatebur and then pressed in four forming stages. In the through-feed process it is possible to carry out controlled cooling from the forging heat.
Machinery: Hatebur
Name Forming stages |
AMP 50 XL 4 |
AMP 70 XL 4 |
Special features:
• The AMP70 has an 180 mm ejector stroke for extruded parts
• Extruded parts can also be produced on the AMP50
Compression forming of rotationally symmetrical blanks at 1100°C – 1250°C between counter-rotating moving generating tools, which reduce by rolling on the surface of the workpiece. Preferred process for manufacturing gear shafts with widely diverging geometrical cross-sections.
Machinery: Smeral wedge rolling
Number Roller diameter |
3 machines 1000 mm |
Special features:
• Forming with undercuts is possible in this process
• Distortion after machining (hardening) is low
• Homogeneous grain flow through whole shaft
The ring roller process is realised as a combination process in the temperature range of 1100°C – 1250°C. A process combination of blocking and radial and axial rolling permits seamless production of complex ring gears for the gear differential.
Machinery: maxi-press, multi-pin radial roller and axial die-forging roller
Number Maxi-press |
3 machines 16000 kN |
Special features:
• Rolling blanks can be designed with low allowance as finished part
• Especially good surface quality through rolling process
• Unfinished surfaces = finished surfaces can be taken into account on the product
• Environmentally friendly process thanks to low material use
Semi-hot forming is carried out in a temperature range of 750°C – 950°C. Compared to hot forming geometrically more precise components can be produced here and the forming forces can be reduced compared to cold forming.
Machinery: Schuler press
Year of construction |
2005 |
Special features:
• Drive parts, outer race, are folded in hot on the Schuler press
• Semi-hot rough pressing and cold calibration are possible in combination
• Process permits production close to final contour
• High surface qualities can be realised