CANADA'S LEADING INFORMATION SOURCE FOR THE METALWORKING INDUSTRY

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CANADA'S LEADING INFORMATION SOURCE FOR THE METALWORKING INDUSTRY

CANADA'S LEADING INFORMATION SOURCE FOR THE METALWORKING INDUSTRY

EMAG Koepfer gear hobbing machine HLC 150 H

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EMAG Koepfer’s HLC 150 H gear hobbing machine has been designed for the demanding process of machining the teeth of a rotor shaft for electric cars.

Very few other applications place such high demands as transmission components. The very quiet motor requires the highest surface finishes so that disturbing running noises do not occur. In addition, the number of units in e-mobility is greatly increasing, which is an additional challenge for the mechanical engineering involved. What is needed, therefore, are process-reliable solutions for cost-effective rotor shaft production.. 

The fact that electric cars don’t have any transmissions (apart from the sometimes-indispensable differential) is just a legend – but one that persists quite stubbornly in the public eye. It assumes that the electric motor does not require any gear ratio given its stable torque. In practice, however, it is usually the case that a so-called 1-speed gearbox is used, which helps reduce the speed of the electric motor by a certain factor. As a result, there are numerous gearing elements on components such as the drive shaft, rotor shaft or axle drive, and their component quality must be exceptional so that, for example, there are no loud running noises – these would be audible given the quiet electric motor.

The HLC 150 H gear hobbing machine offers a high level of productivity for components with a maximum length of 500 millimeters and a weight of 10 kilograms. The milling head is very rigidly suspended and moves completely during machining. The shift axis is made up of the interpolation of two axes. In this way, a large milling head swiveling angle is realized with a large shift path at the same time. As a result, gear hobbing is very smooth and the gear quality is high. The horizontal arrangement of the workpiece also prevents chip clusters from forming. EMAG Koepfer says this technology ensures enormous performance figures in the machining of rotor shafts with cycle times of only 35 seconds at a gear quality of DIN Q7.

More information here.

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