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Section 5a: Developing the Contact Pattern Through Computer Modeling - An Overview |
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2) Understanding Contact Pattern and Gear Displacement 3) Conventional Methods for Contact Pattern Development 4) A New Method for Contact Pattern Development 5) Developing the Contact Pattern Through Computer Modeling: 6) Duplication of Operating Conditions with Universal Load Testers A Case Study of the PW6000 Project 8) Troubleshooting and Failure Analysis 9) Contact Arrow's Design Engineering Team
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The procedure of developing a contact pattern with this system is a very complex process. However, to provide a clear understanding of how the system works, the conceptual highlights of a typical development will first be presented. A more detailed explanation of the steps involved will be presented later. The process begins by receiving the customer’s design requirements. This would include drawings of the part detailing the critical geometry such as ratio, diametral pitch and so on. In addition, it is helpful if the customer can supply specifications on operating torque and the gear displacements. Engineers begin
the process of contact pattern development by establishing a The next step is to perform the loaded TCA, which predicts the contact pattern under load. Finally a loaded TCA is performed, taking into account all the displacement conditions. Once the TCA study is performed for all displacement conditions, the ideal contact pattern is identified. With this information, a finite element analysis is performed which predicts real stress on the tooth surface as well as the root fillet. This study allows the engineers to determine whether there is a potential for failure resulting from excessive or nonuniform pressures anywhere along the line of engagement of the gear tooth. A more detailed explanation of how the TCA and Finite Element studies are actually performed are presented in the next section. |
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Section 5a: Developing the Contact Pattern Through Computer Modeling - An Overview |
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working file
for the part – based on its geometry. Using the CAGE software, a Tooth
Contact Analysis study, or TCA, is performed. This indicates the location
of the contact pattern without load.