subject: Modeling of Gears [print this page] A gear is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque. Gears are very important machine elements today and they are commonly used in different kinds of gearboxes and transmissions.
There are various types of gears such as spur gears, helical gears, and worm gears, etc. In addition to them, the cylindrical gears are also very important category. They are especially most applicable because of their very high efficiency and easy production. Thus, something related with this kind of machinery part is also very important.
Modeling of cylindrical gears is very important process in machine design, as for making real model of gearbox, such for gear and transmission structure analysis and optimization. Although we are not familiar with the modeling of them, it is still very necessary to learn about it. The main problem in any gears modeling is to define a real gear tooth and after that to import it into body making. Therefore, cylindrical gears modeling consists of several phases, depends from gear body and kind of its production.
Some software tools are used for machine design and machine elements modeling. And the CATIA software is applied in the modeling of cylindrical gears. Part and shape design are the basic modules of design in CATIA software. They are based on several tools for easy and qualitative modeling of any kind of machine elements. There are many features in this design such as the sketch-based features, dress-up features, and transformation features, etc.
Taking the transformation features as an example. These features are very useful for different transformations such as creating a translation, creating a rotation, creating symmetry, creating a circular pattern and exploding patterns, etc.
In order to achieve the gear modeling successfully, it is very important to do some things. For example, you should make gear body properly in part design or to complete it using assembly design module of CATIA. And because of many applications that could be done, the gear modeling is very significant. Internal and external gears models can be used for solving a lot of problems in mechanical engineering, such as structural analysis, contact pressure between corresponding gears and also thermal and many other analyses.
