GEOMETRIC ERROR MODELING ON ONE AXIS AT MACHINE TOOL
Machine tool will experience a decrease in performance within a certain period of time, especially in relation to its accuracy and precision level. In a long run, this will result in decreasing productivity. The decrease in machine work productivity can be caused by many factors, one of which is geo...
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| Format: | Dissertations |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/57079 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Machine tool will experience a decrease in performance within a certain period of time, especially in relation to its accuracy and precision level. In a long run, this will result in decreasing productivity. The decrease in machine work productivity can be caused by many factors, one of which is geometric error. Various studies have produced several new methods for modeling geometric errors. However, these studies do not explain the motion error along the machine tool guideway, which is an important factor to the result of the dimensional product accuracy. This research discusses the development of the two linear guideways method used on the machine tool table. The novelty and originality of this dissertation lies in the development of geometric error in the form of mathematical model.
This mathematical geometric error model is carried out through four stages of research. In the first stage, the model is constructed only on one linear guideway for one axis of motion. The second stage, validation of the geometric error model by comparing the trend graph of the laser results and statistical tests. The third stage, the model is constructed on two linear guideways for one axis of motion. The fourth stage, the geometric error model validation is again carried out for the two linear guideways. The first and third stages produce six geometric errors, namely position error, vertical and horizontal errors, and angle errors, namely pitch, yaw and roll. The validation process in the second and fourth stages is carried out on the three-axis Freis tapping Brother. The validation process is carried out by measuring geometric errors using a laser interferometer and a dial indicator. After these four stages, at test analysis is carried out to prove the results of the model and the laser are still in one population. The t-test results show that the results of the model and laser are still in the same population, so it can be concluded that the geometric error model is correct and can be used to predict the size of geometric deviation at the center of the machine tool table.
This dissertation takes the theme of a geometric error model on a linear guideway for one axis on a machine tool table. The geometric error model on the linear guideway is used to inform the accuracy and precision level of machine tools. The benefit of a mathematical model of geometric errors is to provide large information on geometric errors on the linear guideway of machine tools. This information aims to help the maintenance and assembly process of a machine tool table with better quality output at freis tapping machine. Another benefit of the geometric error model is that the machine tool design can help determine the specification of the linear guideway. In this maintenance and assembly process, the main goal is to understand the tolerance limit of the allowed machine tool movement according to ISO-10791:2. |
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