| Summary: | 碩士 === 國立虎尾科技大學 === 機械設計工程研究所 === 101 === Blanking process is one of the fastest and effective method for widely used in production of sheet metal parts. However, the blanking parameters has to be through experience and trial and error method to determine the shape , resulting in waste of manpower and raw materials. Using the finite element method to analyze the blanking parameters to avoid these situation.
In the process of blanking, the cut part due to the dimensional accuracy and the quality is rough sections, often requires a series of follow-up trimming procedure. The cost to maintain the processing punch and the accuracy of die will be very high. The defective phenomena including rough shearing surface. and poor accuracy after the blanking process.
Therefore, the main objective of this research is to improve the defects appeared on shearing surface of a SPCC material blanking product with the Taguchi method .
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According to the operating parameters of a existing punching machine to simulate the cutting behavior by using the CAE software ABAQUS and with the Taguchi method analysis, Taguchi quality design method is used to find the optimal parameters of experimental press used for blanking of circle sheet metal parts. The four control parameters used in this study are punch degree, die clearance, holder pressure, and the radius of die’s edge. And the cut surface of the forming section of the situation and characteristics of the distribution were compared with the actual product, the amount of difference compared to the results were the roll-over section 1.55%, the shear section 1.3%, fracture section 2.94%. This analysis tends to show similar results.
This study is based Taguchi method, in accordance with blanking journey to establish L_9 orthogonal array, then use the CAE software ABAQUS finite element analysis of the blanking behavior, and to explore the quality of shearing surface and forming the case , then get the best travel parameters.
The results show that, by the Taguchi analysis, the punch degree and the Holder press provide a greater impact on the quality of shear section; die corner less affected. Finally, this optimization parameters to predict the confirmation experiment to verify this optimization parameters on product quality has been improved shear section. And is expected to reduce the number of test mode, manpower, raw material waste.
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