Thermal Characteristics Analysis of CNC Lathe Machine Spindel Okuma-Howa Act-3
This research was carried out as a part of reverse engineering of the CNC Okuma-Howa Act-3 lathe spindle that is a study of the thermal characteristics of the machine's spindle. Deformation due to thermal load occupies 40-70% of the total deformation that occurs in the spindle, therefore an...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/43701 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | This research was carried out as a part of reverse engineering of the CNC Okuma-Howa
Act-3 lathe spindle that is a study of the thermal characteristics of the machine's spindle.
Deformation due to thermal load occupies 40-70% of the total deformation that occurs in the
spindle, therefore an analysis at operating conditions is required. Analysis of the influence of
uneven load distribution on the bearings is also carried out to get a clearer picture related to
the real conditions of heat transfer on the spindle. After the thermal characteristic of the
existing machine has been acquired, another step is analyzing the influence of design
improvement on the thermal characteristic. Design improvements were focused on spindle
rotating speed improvement and single-helix cooling system addition on bearing housing.
Thermal deformation distribution is simulated using ANSYS through Steady-state
thermal, Static Structural, and Fluent analytic features. The maximum temperature of 115 C
is located on bearing and the maximum total deformation of 196 µm occurred on the chuck.
On distributed bearing load condition, the y-axis deformation is dominant than another
deformation. The maximum total deformation of 289 µm happened by maximum theoretic
spindle rotating speed of 4300 RPM. The single-helix cooling system of water running at
0,079 Liter/s is capable of decreasing total deformation into 29,832 µm
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