Static Characteristic Analysis of Okuma-Howa ACT-3 CNC Lathe Machine Spindle

• Main Author: Anggara Yudha Nurtjahjana - 13114129, Calvin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26183
• Institution: Institut Teknologi Bandung

Spindle is the main component in machine tools. As the main component, spindle playing important role to improve accuracy and productivity of the machine tools. Spindle design determines those qualities. Rotational speed and stiffness is the main parameter in designing spindle. Static stiffness of a spindle is one of the most important parameter to be appraised in spindle design process. Static stiffness would determine how spindle would deform under certain load such as cutting force and feeding force. <br /> <br /> Spindle analysis uses finite element method software. The first step of the analysis to define the two spindle model in the finite element software, for radial stiffness analysis and for axial stiffness analysis. Then, through simulation the radial and axial static stiffness of spindle are determined with two different bearing stiffness value input, constant and linear. <br /> <br /> The simulation result would show that the spindle would be deflected for 6.90 &#956;m if subjected to 3080 N radial load and has a radial stiffness of 450 N/&#956;m. On the other side, the spindle would be deflected for 5.30 &#956;m if subjected to 2310 N axial load and has an axial stiffness of 600 N/&#956;m. Spindle deflection is not affected by bearing stiffness value input. In contrast, spindle stiffness is affected by bearing stiffness value input.