Papers by Keyword: ECAD

Abstract: The mechatronic technology raises a new requirement for the product design process which is both mechanical and electrical design need to be more interactive, collaborative and integrated.. In order to satisfy the requirement, in this paper, a new integrated CAD system has been developed based on the 3d modeling kernel Open CASCADE. The main 3D mechanical and 2D electronic digital design functions are developed and integrated in the system. In addition, the electromechanical parts library, which was built in the system, includes not only mechanical information such as 3D package geometry structure but also electronic properties of electronic components. The circuit logical design can be carried out in the 2D logical design module of the system, and next important electromechanical design process is PCB layout and optimazation with mechanical structure are integrated in 3D environment. At last, an example is shown to illustrate the system, which can support the design of mechatronic products, decrease the interactive work and data exchange between mechanical and electronic information and improve the design efficiency.

Abstract: The equal channel angular drawing (ECAD) process is an innovative method to obtain materials with high plastic strain in a continuous way. This deformation is higher than the deformation achieved by a conventional wire drawing process, for the same reduction of the cross section, so if an adequate thermal treatment is employed later, it could be possible to obtain an initial material with high value that could be useful in conventional manufacturing processes. This process consists in drawing a material through a die where two circular channels intersect at an angle between 90º and 135º. In this work a study using finite element of the plastic strain and the stresses that appear for one aluminium alloy AA-1370 has been carried out. Two ECAD passes have been made, where for the second pass the billet has been rotated 180º along the longitudinal axis. Finally, a calibrated pass has been carried out in order to obtain the billet with homogeneous dimensions in all the cross section. All the simulations have been calculated at room temperature and by using good conditions of lubrication. In order to perform the FEM simulations, a three dimensional geometry has been used. To analyze by FEM the second ECAD pass and the calibration pass, the deformations and stresses achieved in the previous passes have been taken into consideration. This has been done with the aim of achieving higher accuracy. Moreover, a comparative analysis with experimental results has been carried out.

Abstract: In this paper indirect ECA drawing method was supposed to be feasible for application. This method will ensure same deformation degree as that in ECAP while keep the size of the billet unchanged so that multiple processing can be done. With this method, materials with both rectangular and round section can be processed and there is no limit to the length of the materials. Die configuration was set up and the equations for relationship among die parameters, billet parameters and its properties, drawing forces and applying pressures are given.