The Study of Secondary Drawing of Sheet Metal Using Rapid Tooling Process
碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 101 === Due to the global competition and customization of the products requirement, industry is now under high pressure to engage on and to build up manufacturing processes that can provide flexibility and cost savings to comply with the customers’ requirements fo...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/10106847599219933827 |
| Summary: | 碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 101 === Due to the global competition and customization of the products requirement, industry is now under high pressure to engage on and to build up manufacturing processes that can provide flexibility and cost savings to comply with the customers’ requirements for limited production and ever-changing for the products. One of the proposed technologies is rapid prototyping technology which has gained very good acceptance for the quick fabrication of prototypes with low cost irrespective of the complexity of the shape.
In this paper, the epoxy-aluminum mould technology usually used in rapid tooling is studied in the deep drawing process. The first objective is to propose the effect of spring-back and drawing step to punch and blank. The punch is made of epoxy-aluminum composite while the blank is made of 1 mm thickness JIS SPCC (steel plate cold commercial). Due to the influence of lubrication in drawing process, compression test is also carried to obtain the friction coefficient. On the other hand, how to reach the limit drawing depth by avoiding the fracture or wrinkle on the blank is the other discussion of this study. Explicit finite element code is used to simulate the process of the punch and blank.
Experimental and analysis results show the stress and strain in the course of two-stage deep drawing is smaller than those of single-stage deep drawing. It also shows that the thickness of the blank will be reduced in the corner and side-wall on the blank due to the tensile stress on the blank and effect of friction between punch and blank. Analysis results demonstrate a good agreement with experimental results.
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