外文翻譯--基于有限元法的擠壓過(guò)程比較分析(英文）

1、 Procedia Engineering 100 ( 2015 ) 74 – 83 1877-7058 © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/

2、4.0/).Peer-review under responsibility of DAAAM International Vienna doi: 10.1016/j.proeng.2015.01.344 ScienceDirectAvailable online at www.sciencedirect.com25th DAAAM International Symposium on Intelligent Manufacturin

3、g and Automation, DAAAM 2014 Comparative Analysis of Extrusion Processes by Finite Element Analysis A. García-Domínguez, J. Claver, A.M. Camacho*, M.A. Sebastián Department of Manufacturing Engineering, U

4、niversidad Nacional de Educación a Distancia (UNED), c/ Juan del Rosal 12, Madrid, 28040, Spain Abstract Extrusion processes are quite extended in the manufacturing of long products for a wide range of industrial a

5、pplications. There are different approaches of extrusion processes, depending on either the final shape of the product to obtain or the maximum loading capacity of the equipment to be used. This work presents a comparat

6、ive study of extrusion processes (solid and cup extrusion), considering both direct and indirect forming conditions and showing the most interesting differences between them. The comparison is realized by Finite Elemen

7、t simulation of the processes, using the code DEFORM F2. The material is a low carbon steel (AISI-1010) and the same extrusion ratio and ram displacement are considered in all cases. By comparing the required forces it

8、 can be concluded that required loads are higher in cup extrusion processes than in solid extrusion ones. Regarding the friction load, the maximum contribution due to the die-billet contact in cup extrusion is much high

9、er than in the case of solid extrusion. On the contrary, the maximum friction load contribution due to the container wall is much higher in the case of solid extrusion than in cup extrusion. © 2015 The Authors.

10、Published by Elsevier Ltd. Peer-review under responsibility of DAAAM International Vienna. Keywords: extrusion; friction; direct; indirect; FEM 1. Introduction Extrusion processes are one of most extended processes used

11、 in the manufacturing of long products for a wide range of industrial applications. There are different approaches of extrusion processes, depending on factors such as the final shape of the product to obtain or the ma

12、ximum loading capacity of the equipment to be used [1]. Extrusion processes can also be divided into direct/forward and indirect/backward/reverse ones; in direct * Corresponding author. Tel.: +34-91-398-8660; fax: +34-91

13、-398-6460. E-mail address: amcamacho@ind.uned.es © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Pee

14、r-review under responsibility of DAAAM International Vienna76 A. García-Domínguez et al. / Procedia Engineering 100 ( 2015 ) 74 – 83 section of each case is modelled. For all the cases the workpiece is

15、 cylindrical with an initial radius of 5 mm and 10 mm in height. The cross-sectional area of the final extrusion is also the same in all cases. Thus, for all the extrusion processes considered, the extrusion ratio is t

16、he same, defined as the ratio between the initial and the final cross- sectional area, as indicated in equation (1). ? ? ? ???? (1) Fig. 1. Geometric sketches for direct extrusion. Fig. 2. Geometric sketches for indirect

17、 extrusion. Once the geometrical conditions for all the cases have been defined, new parameters must be implemented into the software used. Thereby, all the simulated extrusions correspond with cold forming conditions a