| Title |
Programinių staklių prototipo skirto polimerų apdirbimui projektavimas ir tyrimas / |
| Translation of Title |
Design and analysis of a cnc machine prototype for polymer machining. |
| Authors |
Dragūnas, Petras ; Snapkauskas, Marius |
| Full Text |
|
| Pages |
94 |
| Keywords [eng] |
numerical control milling machine ; prototype ; polyacetal |
| Abstract [eng] |
This paper covers the design and testing of a three-axis computer numerical control (CNC) milling machine for machining polyacetal (POM) and other polymers. This study is relevant in today's trend, when technological devices are becoming personal (personal computers, personal 3D printers, etc.). There are similar machines in the market, but specific studies on the structure rigidity and machining accuracy has not yet been carried out. The research results can be applied to further personal CNC milling machine development and production. This master's project aim is to create a programmable CNC machine prototype for polyacetal machining and to investigate the machine rigidity and accuracy. The paper provides an overview of polyacetal, its mechanical characteristics and comparison with other commonly used industrial materials characteristics. Review is continued on different machine components. Then the best machine structure type is selected and modeled within SolidWorks 2016 software. Simulations of the model are performed to back up the selected structure type. The designed machine is assembled and tested. The price for constructing the machine is compared with similar machines on sale. The study of the machine is begun by calculating cutting forces generated when machining polyacetal by nine different routing regimes. Then a simulation of the machine is performed and the result are compared with the experimentally retrieved data of the strain and deflection occurring during machining. A regression analysis is performed, which shows that the cutting feed rate has the largest effect on the machine structure deflection. With the nine different routing regimes a testing part is machines, for each regime and the accuracy of the machining is measured. The optimal regime is chosen according to the results. A graph showing the dependency of the nine regimes deflection and precision is constructed. With the optimal regime twenty same test parts are machined and measured for obtaining machine accuracy. Measurement and analysis results are presented graphically. At the end of the paper conclusions and improvements are presented. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Master thesis |
| Language |
Lithuanian |
| Publication date |
2016 |
