Page 22 - AMTDC Annual Report 2019-20flipbook

Development of Direct Drive Abrasive Cut-off Machine

Scope/ Objective:

1. To develop direct drive mechanism using flexible pin type coupling
for abrasive cutting machine. In order to develop the direct drive
mechanism, the design of the spindle assembly is the central theme
as it affects the output characteristics, parallelism, surface finish and
integrity of the cut surface. Achieving a Fast &

2. To design the entire direct drive mechanism adoptable for Deformation-free
automatic abrasive cutting. sample cutting

3. Analysis of design of different machine tool elements like spindle
shaft, bearings, couplings and structural elements. The indigenous development of

Project Overview: high-power large-scale direct drive
abrasive cutting machine by AMTDC

Different conceptual designs for direct drive of abrasive cutting is a new addition to the existing
wheel instead of belt drive were studied and the feasibility of small-scale direct drive cutters in
incorporating these designs was analysed. The design concept of India. A high power, high quality fully
inline coupling of spindle shaft with motor combined with an axially automatic cutting machine suitable
flexible transmission couplings was chosen. The direct drive spindle for 300 mm to 500 mm cut-off
assembly was designed and analysed along with its mounting wheels with the capacity to cut solid
assembly. The designed unit was fabricated as a full-fledged direct sections up to 150 mm in diameter is
drive abrasive cutting machine. The machine tool spindle rotates at developed successfully with the
high rates of speed to provide relative motion between the work- newest technologies for fast cutting
piece and the cutting tool and also acts a support for the cutting and deformation-free specimen
wheel. Therefore, the spindle has a direct impact on both the surfaces.
material removal rate and the accuracy of the finished part. In order
to achieve the requirements for the efficient machine tool spindle,
following design approaches have been followed subsequently.

• Static analysis on the spindle shaft
• Geometrical characteristics of the spindle

• Bearing arrangements

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AMTDC Annual Report | 2019-20