Abstract
There are many process parameters which have great effect on the forming quality of parts during automobile panel stamping forming process. This paper took automotive lower floor board as the research object; the forming process was analyzed by finite element simulation using Dynaform. The influences of four main process parameters including BHF (blank holder force), die corner radius, friction coefficient, and die clearance on the maximum thinning rate and the maximum thickening rate were researched based on orthogonal experiment. The results show that the influences of each value of various factors on the target are not identical. On this basis, the optimization of the four parameters was carried out, and the high quality product was obtained and the maximum thinning rate and maximum thickening rate were effectively controlled. The results also show that the simulation analysis provides the basis for the optimization of the forming process parameters, and it can greatly shorten the die manufacturing cycles, reduce the production costs, and improve the production efficiency.
Highlights
Automotive lower floor board has an important effect on the transportation process of vehicle; the performance of lower floor determines the stability and safety of the whole vehicle [1, 2]
In order to study the effects of several process parameters which have great influence on the forming quality of parts, which can be optimized, this paper adopts automotive lower floor board as the research object
For the above process parameters, orthogonal experiment factors were designed for the BHF, die corner radius, die clearance, and friction coefficient
Summary
Automotive lower floor board has an important effect on the transportation process of vehicle; the performance of lower floor determines the stability and safety of the whole vehicle [1, 2]. The forming processes of automobile covering parts generally include drawing, trimming, stamping, shaping, flanging, and other processes, of which the stamping process is the most important step of all, and the results of the stamping are directly related to the product quality and subsequent process. In order to study the effects of several process parameters which have great influence on the forming quality of parts, which can be optimized, this paper adopts automotive lower floor board as the research object. The shape and parameters remain unchanged; use the orthogonal experiment and ETA (engineering technology associates)/Dynaform simulation software to analyze BHF (blank holder force), die corner radius, die clearance, and friction coefficient to study impact level of these four parameters with the results of maximum thinning rate and maximum thickening rate and optimize these parameters
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