Focus Areas

• Types and application Spindles
• Bearing selection and arrangements
• Spindle materials and heat treatment
• Design concepts & Calculations
• Design of 3D & 2D critical drawings
• Importance of spindle stiffness on machine performance
• Elastic flexibility of antifriction bearings
• Elastic flexibility of spindles supported in two supports
• Why bearing manufacturers supply stiffness for bearing sets and not for individual bearings
• Long hand calculations for computing spindle rigidity
• Inter dependence of spindle shaft and bearing elasticity
• Deflection of spindles supported in three or more bearings-continuous beams
• FEA approach for computing stiffness, bearing reactions and vibrations
• Demo on FEA approach
• The more versatile programming approach for predicting bearing stiffness, reactions, life, vibrations
• Case studies on spindle design

Background

Machine tool spindle is most sophisticated member in machine tool and plays a vital role for better performance, higher efficiency and accuracy. Design of spindle is very important and a critical activity of machine tool design process. Spindles are integral part of the machine tool and responsible for quality of the final product produced and overall productivity of the machine tools. It is very essential analyze and optimize the design for low cost and better performance. Sizing of the spindle for machine capability in terms of dimension, power, speed, force and accuracy are the key challenges for machine designers for right machine and right application. Understanding the spindle design process is the first step for overall machine success.

Key Takeaways

After undergoing the programme, the participants will be able to -

• Gain knowledge on types and application of spindles used in metal cutting machines.
• Understand Bearing selection & pre loading for spindles.
• Learn about Design calculations on spindle design.
• Understand Importance of spindle stiffness on machine performance
• Follow FEA approach for computing stiffness, bearing reactions and vibrations
• Understand Long hand calculations for computing spindle rigidity
• Go through Scientific approach for design of spindles for Turning applications.

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