Design of mechanical clinching tools for joining of aluminium alloy sheets

Lee, Chan-Joo; Kim, Jae‐Young; Lee, Sang-Kon; Ko, Dae-Cheol; Kim, Byung-Min

doi:10.1016/j.matdes.2009.10.064

Cited by 167 publications

(90 citation statements)

References 11 publications

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“…In the clinching process, geometrical interlocking is strongly influenced by punch corner radius. [17,20] The initial deformation of the upper sheet is particularly influenced by the punch corner shape. The upper sheet is initially indented through the narrow clearance as in a deep-drawing and ironing process.…”

Section: Influence Of Punch Corner Radius On the Geometrical Interlocmentioning

confidence: 99%

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Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Lee

et al. 2014

Advances in Mechanical Engineering

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Carbon fiber-reinforced plastic (CFRP) is a lightweight material that can potentially replace structural steel components in automobiles. The hole-clinching process is a mechanical clinching technique for joining brittle or low-ductility materials, such as CFRP, with ductile materials. In this study, the influence of tool shape on the hole-clinching process for CFRP and SPRC440 was investigated using FE-analysis and experiments. The parameters of the tool shape investigated were the punch corner radius and the punch diameter. The geometrical interlocking shapes of hole-clinched joints were characterized by neck thickness and undercut. Based on the desired joint strength of 2.5 kN, hole-clinching tools were designed on the basis of the relationship between joint strength and geometrical interlocking. FE-analysis and hole-clinching experiments were performed with the designed holeclinching tools to investigate the geometrical interlocking shape as well as joinability, including neck fracture, undercut, and hole expansion, resulting from changes in tool parameters. Joint strength was evaluated to verify the effectiveness of hole clinching by a single lap shear test.

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Section: Influence Of Punch Corner Radius On the Geometrical Interlocmentioning

confidence: 99%

“…Lambias and Ilio [19] optimized clinching tools by FE-analysis and artificial intelligence techniques. Lee et al [20] have proposed a clinching tool design method using an analytical model and Box-Behnken methods. Previous studies showed that parametric study of clinching tool shape is necessary to obtain sufficient joint strength.…”

Section: Introductionmentioning

confidence: 99%

Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Lee

et al. 2014

Advances in Mechanical Engineering

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“…The use of clinching is of great interest to many industrial sectors including aerospace and automotive. This, together with increasing use of light weight materials which normally are difficult or impossible to weld, has produced a significant increase in the use of clinching technology in engineering structures and components in recent years [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Fracture Analysis of Clinched Joints in Titanium Sheet Materials

Luo

Zhang

et al. 2017

Acta Phys. Pol. A

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Mechanical fastening techniques are used extensively in different industry fields for joining various materials in the assembly of components and structures. The use of mechanical clinching is of interest to different industries such as aerospace, automotive, packaging and domestic appliance. This, together with increasing use of light-weight materials, has produced a significant increase in the use of mechanical clinching in light-weight structures in recent years. This paper deals with the mechanical properties and fracture analysis of extensible die clinched joints in the dissimilar metal sheets combinations of titanium sheet material and aluminum sheet material. Tensile-shear tests were carried out to characterize the mechanical properties of different clinched joints made of the dissimilar metal sheets combinations. The normal hypothesis tests were performed to examine the rationality of the test data. The load-bearing capacity and failure modes of different titanium sheets clinched joints were studied. Results showed that most titanium sheets clinched joints failed in the neck fracture mode. Results also showed that the load-bearing capacity of clinch joints with titanium as upper sheets is higher than that of the clinched joints with titanium as lower sheets.

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“…The researches about the cold stamping deformation are also being published. For instance, Lee et al [5] used finite element software to analyse the neck thickness and undercut based on the bottom thickness of die to simulate the connection failure value. The simulation was also compared with actual experiment to prove the software reliability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the clinching process combines with hot stamping process for high-strength steel sheets

Chen

Huang

Hsu

2015

MATEC Web of Conferences

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Abstract. The mechanical clinching process combining with hot stamping process for high-strength steel sheets is investigated in this study. Finite elements analysis method and experimental method are applied to analyse the formation of high-strength steel sheet. The connecting strength between two sheets is discussed via the relation between neck thickness and undercut, and the Vickers hardness. The results indicated that the cooling water channels of hot stamping die provided efficiently temperature exchange to control the temperature of sheets. The 15B22 sheet, after being hot stamping process, obtained higher connecting strength than S15C and S45C. At high temperature, the materials properties of 15B22 are similar to that of the S15C. However, due to the hardness of 15B22 is higher than that of S15C and S45C, the undercut is also higher. Hot stamping process means to rapid cooling hot metal, which change the structure from austenite to martensite, so that the hardness will be increased. Hence, the connecting strength of 15B22 is stronger than S15C and S45C.

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Design of mechanical clinching tools for joining of aluminium alloy sheets

Cited by 167 publications

References 11 publications

Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Mechanical Properties and Fracture Analysis of Clinched Joints in Titanium Sheet Materials

Investigation of the clinching process combines with hot stamping process for high-strength steel sheets

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