Page 24 - AMTDC Annual Report 2019-20flipbook

Development of Orbital Motion Abrasive Cut-off Machine

Scope/ Objective:

1. To develop a detailed design of the fixed eccentricity orbital
mechanism adoptable for automatic abrasive cutting.
2. To design a precision spindle, couplings and accessories to
realize orbital motion through the analysis of different machine
tool elements like spindle shaft, couplings, gears, universal joint
and bearings. Next Generation
3. To build the prototype of orbital motion abrasive cutter, and to Abrasive Cutter
validate it in comparison with similar products available in the
international market. Orbital motion abrasive cutting

Project Overview: machine is the next generation
cutting machine which provide
The project started with the development of the conceptual solution to the problems like long
designs of different eccentric mechanisms that generate orbital cutting time, high wheel wear,
motion. Algorithm for evaluating the nominal area of contact thermal damages in work-piece, etc.
between wheel and work-piece was developed. Simultaneously, associated with the traditional chop
simulation of the relative motion between wheel and work-piece or traverse cutters. The technology
was done. A detailed design of the spindle assembly was made of orbital motion mechanism is
with subsequent analysis of the structural rigidity of the orbital developed indigenously and then
spindle bearing assembly. At the initial stage, length of the incorporated in the abrasive cutting
spindle, bearing span and overhang were selected based on machine to facilitate a very high
assumptions taken from machine spindle standards. performance cutting of defect free
Determination of shaft diameter at the bearings and wheel surfaces at a much-reduced cutting
locating points was mandatory considering the multiple steps in time.
the spindle shaft.

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AMTDC Annual Report | 2019-20