Effect of Die Gap and Punch Travel on Springback in Air V-Bending Process Using Taguchi Method

Abstract. Non-uniform thickness section section is considered one of the most effective approaches to reduce automotive part weight. Reduction in term of mass and size result in less fuel consumption and greenhouse gases. Thickness is the most significant parameter to formability, therefore forming a section with non-uniform thickness becomes a great challenge. Improper process and incorrect decision may lead to severe defect and one of the main concerns is the springback. This study will focus on springback behaviour of non-uniform thickness AA6061 strip with complex profile using Taguchi Method. Profile projector (PC 3000) is used to measure the spring back and two-line technique is applied to measure angles (after loading) between two lines. Three parameters (i.e. annealing temperature, thickness ratio and bend angle) are studied, and results determine that the most significant parameter is bend angle, followed by thickness ratio, and then by the annealing temperature of the specimen during bending process.

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“…5-7. Since this model have mixed level of parameters, 0.7418 is possible for this study and coincide with analysis done by Buang et al [14]. …”

Section: Regression Analysismentioning

confidence: 62%

Effect of annealing, thickness ratio and bend angle on springback of AA6061-T6 with non-uniform thickness section

2016

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“…Effects of various factors on springback have been analyzed by ANOVA techniques. The result showed that the punch travel is more significant factor than die gap [25].…”

Section: Factors Affecting Springbackmentioning

confidence: 73%

A Review on Spring Back and Optimization Process

2018

IJMTER

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Abstract-Recently forming industries faces spring back drawback in forming process like cold drawing, sheet metal forming, bending etc. These forming process resulted permanent deformation by cold forming to create different shapes. Spring back defect taking place during the forming process has been emphasized. The solution to such defect problems was also given. Literature review shows that considerable amount of researches have been conducted in the field of material forming and spring-back optimization process. The present review focuses on the cold forming processes, spring back defect, factors affecting spring back, the various methods used to analyze and optimize the spring back free process. This review also opens future research work to get dimensional stability and least springback.

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“…Researchers have developed metal bending rebound prediction models for compensating the CNC bending parameters 8 – 11 There are many factors that affect the amount of rebound, including the size, shape, thickness, material, and structure of workpieces, as well as manufacturing parameters 12 , 13 . The bending rebound model cannot cover all of the factors affecting rebound at the same time.…”

Section: Introductionmentioning

confidence: 99%

Research on the angle measurement system of bending workpieces based on multi-line structured light

He,

Xie,

Liu

et al. 2023

Opt. Eng.

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.Nowadays, bending workpiece angle measurement methods require touching the surface, which makes them prone to scratching the workpieces and inefficient. To solve the above problems, we propose a non-contact angle measurement system based on multi-line structured light. First, a bilinear laser is projected onto the surface of the workpiece and the machine tool lower die. However, reflections on the smooth workpiece will greatly destroy measurement accuracy. In this work, a UNet-based multi-exposure image fusion strategy is proposed to clip the reflection and increase the workpiece feature. Then, the Steger algorithm is used to achieve high-precision localization of the laser centerline. Finally, the angle of the workpiece is calculated indirectly according to fitting the laser centerline plane. The experimental results demonstrate that the measurement time of each workpiece is less than 100 ms and the measurement accuracy is ±0.3 deg in extreme installation locations and shadow. The proposed system can be extended to real industrial scenarios because of its high efficiency, accuracy, and robustness.

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Effect of Die Gap and Punch Travel on Springback in Air V-Bending Process Using Taguchi Method

Cited by 11 publications

References 7 publications

Effect of annealing, thickness ratio and bend angle on springback of AA6061-T6 with non-uniform thickness section

Effect of annealing, thickness ratio and bend angle on springback of AA6061-T6 with non-uniform thickness section

A Review on Spring Back and Optimization Process

Research on the angle measurement system of bending workpieces based on multi-line structured light

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