Heating Technology

The UMH technology (uniform magnetic heating) allows for the homogeneous heating of metal-based components also when having larger wall thicknesses.
 

• Homogeneous heating up to 700°C (max. 1.100 °C)
• Precise and accurate temperature control up to +/- 10 °C
• No risk of local overheating
• Heating is almost free from heat gradient formation
• Stress-relieved workpiece heating
• Short process period/cycle time
• Heating of different workpiece geometries without changing the coil
• Coils do not require water cooling
• Flexible batch size/geometry
• Low energy consumption, high efficiency
• Little space required, can be integrated into existing systems
• Demagnetization cycle included
• System function control via touch screen and PLC
• Allows for a reliable and uniform product quality

Machine type/ parameters		max. component dimens.				Installation conditions
		Length	Width	Height	Weight	Length	Width	Height	Surface
		mm	mm	mm	kg	mm	mm	mm	m2
UMH S		120	120	100	≤ 5	1.200	1.200	2.100	2
UMH M		300	300	300	≤ 30	2.200	800	2.300	3
UMH L		550	550	400	≤ 50	2.200	800	2.300	3
UMH C		1.500	300	400	≤ 500	3.600	3.500	2.100	13

Preheating and post heating
Heating of hardened parts for electron beam and laser welding or surface hardening

Tempering
Selective tempering of complex hardened parts

Shrink fitting
Joining of rotor and shafts, gearbox and bearing

Stress relief
Homogeneous heating ensures optimal material properties

Heating of molds
Fast and efficient heating of extrusion dies

Connecting polymers with metals
Precise and uniform heat allows for a very good surface adhesion.

For homogeneous heating of workpieces the UMH technology makes use of the hysteresis loss effect occurring in workpieces when exposed to an alternating magnetic field. Hysteresis losses are created by  the changing alignment of the domains or crystalline structures of ferromagnetic and paramagnetic materials to an external alternating magnetic field.

The magnetic flux of the external magnetic field permeates the material and aligns the domains according to the magnetic field polarization. If the alignment of the magnetic field is changed the domain orientation will follow the magnetic field. The friction occurring in this process produces heat losses in the material, which cause – at a corresponding process repetition frequency – an increase  of the material temperature.

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