Page 16 - AMTDC Annual Report 2019-20flipbook

Development of Hydrostatic Bearing Systems: A Step Towards Creating

Technology Base for Indian Precision Machine Tool Builders

Scope/ Objective:

1. Development of hydrostatic spindles and guideways of
different types, designs and accuracy levels suitable for
implementation in machine tools.
Hydrostatic Systems:
2. To develop critical technologies of flow controller, essentially
the heart of the hydrostatic system for which the technological The key to Precision
know-how is not available in India.

3. To develop and evaluate the performance characteristic of Technology
hydrostatic spindle, slide, and novel fixtures like work/ tool
design and critical units such as flow controllers. Throughout the machine
tool industry, hydrostatic linear
4. To build a state-of-the-art grinding machine that uses high guides are considered the best
precision hydrostatic bearing systems that can achieve the world technical solution for vibration
class benchmark parameters.
damping at the point of system
Project Outcome: Patentable loading as they eliminate all metal-
to-metal contact and therefore
Technology of Flow Controllers possess advantages in terms of lesser
friction, higher damping, high load
Two different flow controllers have been developed carrying capacity, moderate thermal
successfully and patented. Circular membrane diaphragm flow effects and extremely low wear. The
controller for Spindle (CMD flow controller) and cylindrical metal outcome is a high-performance
tube diaphragm (MTD Flow controller). CMD flow controllers are
developed indigenously that have a load carrying capability of grinding machine with characteristics
1.5 ton with a static stiffness of 7500 N/μm. The CMD flow that stay consistent for years.
controller is capable of maintaining a prescribed oil film
thickness within a deviation of less than 1 μm for an applied load
of 1.5 ton. The active compensation mechanism in these new
patented flow controllers enables the system to be tuneable
irrespective of the type of machine tools or working conditions.

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AMTDC Annual Report | 2019-20