TPT May 2011

T echnology U pdate

Induction heating

extended frequency range of 20 to 150kHz. With up to 90% efficiency, high reliability, and easy-to-use digital control, the SM Type power supplies are suitable for both new installations and existing systems. “With the flexibility provided by the extended operating range, SM Type power supplies will be quite popular as replacement power sources for many existing industrial heat treating machines,” commented GH IA general manager Steve Skewes. The power supplies feature a modular design with plug-in power control cards. They

utilise IGBT transistors and include a DCP (digital control panel) with built-in diagnostics and optional kW/sec monitoring. A series oscillating circuit offers high efficiency and easy load matching. GH Transithermic power supplies can operate at variable frequencies; the frequency is automatically coupled to the load in every application, within a wide range. GH Electrotermia SA – Spain

Spinform axis tube end profiles HESS Industries Inc, USA, offers spinforming machines that produce eccentric and oblique tube end forms. This process consists of a clamped work piece and a rotating head containing forming rolls. To form a reduced end profile that is offset or eccentric from the tube’s central axis, the clamp moves the workpiece towards the offset axis while the forming rolls reduce the end diameter. The same method is used to produce an end profile that is at an oblique angle by driving the clamped work piece while the forming rolls move radially toward the planned oblique axis. Typical applications include automotive and truck exhaust components and catalytic converters where space is limited or restricted. Typical tube spinforming follows the centreline of the tube. The spinforming process allows substrates such as gas, liquid or power filtration elements to be inserted in the tube and the end forms are spun down to attach to the flow tube. Spinforming eliminates the need to stamp and weld end forms reducing tooling and manufacturing cost while enhancing part quality. Tube spinforming technologies are currently being used in the automotive, HVAC, filtration, marine and other industries. Hess also provides machine process development and prototyping services operations in the USA, Europe, China and India. Hess Industries Inc – USA Fax: +1 269 683 1775 Email: sheffer.rick@hessindustries.com Website: www.hessindustries.com GH Induction Atmospheres has introduced a new series of 13 induction heating power supplies with a wide frequency range for increased flexibility. The SM Type Transithermic ® power supplies cover 0.5 to 20kHz with 100 to 800kW output power; 100kW output is available over the

Fax: +34 961 352 171 Email: ghgroup@ghe.es Website: www.ghe.es

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M ay 2011

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