Hot forming | cotarko.de

Fast forging presses
Wedge rolling
Ring rolling
Semi-hot forming

High-tech

industrial forge

for precision forgings

Fast forging presses

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
Number

Forming stages
Deployment weight
max. Ø forging
Stroke number
Total press force

AMP 50 XL
1 machine

4
up to 2.0 kg
about 104 mm
60-100/min
8000 kN

AMP 70 XL
3 machines

4
up to 5.0 kg
about 150 mm
50-80/min
12-15000 kN

Special features:
• The AMP70 has an 180 mm ejector stroke for extruded parts
• Extruded parts can also be produced on the AMP50

Wedge Rolling

for producing

gear shafts

Wedge rolling

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
Forming force
Torque coupling
Max. Ø for rolling

3 machines

1000 mm
13000 kN
7800 kN
100 mm

Special features:
• Forming with undercuts is possible in this process
• Distortion after machining (hardening) is low
• Homogeneous grain flow through whole shaft

Ring Rolling

for producing

seamless ring gears

Ring rolling

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
Max. Ø forging
Max. forging height
Rolling force
Revolutions per roller

3 machines

16000 kN
280 mm
80 mm
1250 kN
400/min

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

Geometrically

more precise components

thanks to semi-hot forming

Semi-hot forming

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
Forming stages
Stroke number
Nominal pressing force
Table size
Total weight

2005
5
18-32/min
20000 kN
2300 x 1000 mm
340 000 kg

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