Indian Institute of Technology Madras

Svp Laser Technologies Pte. Ltd.

M Venkateshwaran

Viswesh Srinivasan

Sathyan Subbiah

The hotwire cutting machine () comprises a plurality of heated wires (), springs (), and grooved rods (, and) supported on end bearings (). The grooved rods (, and) are coupled to a motor () for rotating the grooved rods (, and) in the direction of wire movement due to thermal expansion. The wires are oscillated along their length by the to-and-fro rotation of a splined shaft (). Existing solutions oscillate the entire heavy frame, resulting in vibrations and requiring heavy motors and drives. In contrast, the proposed hotwire cutting machine () minimizes the oscillating mass and allows for automatic adjustment of inter-wire distance/pitch. The composite cutting wire section includes a first wire () with high mechanical strength and low electrical resistance, joined by manual twisting or welding with a second wire (), typically Nichrome, to withstand repeated bending cycles.

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Chennai, India

M Venkateshwaran