Experimental investigation of the novel dieless clinching process free of blank holder

Qin, Denglin; Chen, Chao; Zhang, Huiyang; Ren, Xiaoqiang; Wu, Jian‐Ying

doi:10.1007/s43452-021-00347-8

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…Figure 11 shows the geometric morphology of the joint obtained at different blank holder limit heights at the blank holder spring stiffness 500 N/mm. When the limited height of the blank holder is 1.4 mm, it is observed that the interlock length is small, the bottom protrusion is high, and there is a clear gap between the two sheets [30]. This is due to material mainly flow in the axial direction without restriction.…”

Section: With the Blank Holder Limitedmentioning

confidence: 98%

“…Besides, Response Surface Methodology is used to predict the optimal joint, with the limitation of the blank holder, a dieless clinched joint with interlock of 0.16 mm and protrusion height of 1.0 mm can be achieved. From [30], Chen et al investigated the novel dieless clinching process free of blank holder by experimental methods, mechanical interlock value can be reached to 0.18 mm. Comparing these two results, it is seen that our result is consistent with the research result from Chen.…”

Section: Effect Of the Blank Holder Limitedmentioning

confidence: 99%

“…Thus, Chen et al [29] compare the failure mechanism of the dieless clinched joints of various aluminum alloys, protrusion heights of the AL5052 joint, AL5182 joint, and AL6061 joint are 1.08 mm, 1.17 mm, and 1.20 mm, the protrusion height is faintly affected by the sheet materials. The protrusion height of the traditional dieless clinching joint mainly depends on the blank holder, the gap between the upper and lower sheets is obvious, and the protrusion height is between 0.33 mm to 1 mm, using a compressed method, the protrusion height can be reduced from 1.62 to 0.94 mm [30].…”

Section: Introductionmentioning

confidence: 99%

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Simulation of dieless clinching process considering the limit of blank holder

Wang

Han²,

Li³

et al. 2023

Mechanics & Industry

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The low strength and large protrusion of the traditional dieless clinched joint hindered its application. To improve the mechanical properties of the dieless clinched joint, a novel dieless clinching process considering the limitation of the blank holder was proposed. The finite element model of the dieless clinching process was established by DEFORM-2D, the influences of the blank holder spring stiffness, the blank holder limit height, and the punch diameter on the mechanical interlock of the joint were analyzed, and the influence laws of blank holder spring stiffness and blank holder limit height on material flow and mechanical interlock were obtained. Then, the influence of these three die parameters and their interaction on the joint interlock were analyzed using the response surface method. The results show that the blank holder displacement plays a key role in the formation of mechanical interlock in the dieless clinching process. Reasonable limit height and spring stiffness of the blank holder can control the flow direction of materials, so as to improve the mechanical interlock and the strength of dieless clinched joints. It provides a new idea for improving the dieless clinching process.

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Section: With the Blank Holder Limitedmentioning

confidence: 98%

Section: Effect Of the Blank Holder Limitedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of dieless clinching process considering the limit of blank holder

Wang

Han²,

Li³

et al. 2023

Mechanics & Industry

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“…Given the above limitation, some scholars attempted to reduce or eliminate the exterior protrusion by improving the mould structure or optimising the joining process. The optimised processes such as dieless clinching [30], flat-clinching [31], reshaping process [32] and dieless clinching process free of blank holder [33] were wildly employed to enhance the joint static strength, improve the mechanical performance and reduce the exterior protrusion height of conventional clinched joint. Moreover, for the irreplaceable feature of the failed clinched joints, that is, when the clinched joints served a long time or subjected to fatigue loads in a period time, the clinched joint cracks or breaks, and the most common solution is to replace it with a new clinched joint.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of single-point butt clinched joint with dissimilar aluminium alloy sheets

Ren

Chen

2023

Materials Science and Technology

Self Cite

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To explore the failure principle of single-point butt clinched joints, the AA5052 and AA6061 sheets were employed to produce the single-point butt clinched joints. The microscopic morphology of the fracture surface, geometrical parameters, static strength, energy absorption and failure details of the joints were analysed. The experimental results showed that fracture forms of sheet materials are the same as ductile fracture. The sheet combination has a significant influence on the mechanical properties of the single-point butt clinched joint, which is ultimately due to the different mechanical properties of the basal sheets. The single-point butt clinching process proposed in this work contributes to simplifying the clinching process while increasing the joining efficiency.

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“…Previously, various thin sheet joining techniques were reported, such as clinching, 7 self-piercing riveting (SPR), 8 bonding, 9 stir friction welding, 10 and resistance spot welding (RSW). 11 Clinching technology plastic deformation under pressure to form mosaic points.…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanical properties and fatigue failure mechanism of 7075-T6 aluminum alloy joints under different joining processes

Zhang

Zhu

Peng

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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To obtain the theoretical basis and reference basis for the selection of low ductility aluminum alloy joining methods, three kinds of joints were obtained using 7075-T6 aluminum alloy sheets for clinching, self-piercing riveting (SPR), and resistance spot welding (RSW) joints, and the single-lap shear tests were performed on the three kinds of joints, and fatigue tests were conducted on the clinched joints and SPR joints. The fatigue fracture of the SPR joint was analyzed using scanning electron microscopy (SEM) and X-ray energy-dispersive spectroscopy (EDS). The results showed that the SPR joint demonstrated the best static performance, followed by the clinched joint and the RSW joint. In the case of the fatigue test, the SPR joint showed better fatigue performance than that of the clinched joint. The fatigue failure of the SPR joint and clinched joint is associated with fretting wear. Fretting wear of the SPR joint is more severe than that of the clinched joint. The debris produced by fretting led to microcracking phenomena in the plate. Under the action of alternating load, the microcracks continued to expand and generate macrocracks, and the joint was broken and finally failed. This fretting wear is the root cause of the failure of the SPR joint. Thus, the SPR joints exhibited the best mechanical properties.

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Experimental investigation of the novel dieless clinching process free of blank holder

Cited by 9 publications

References 24 publications

Simulation of dieless clinching process considering the limit of blank holder

Simulation of dieless clinching process considering the limit of blank holder

Failure analysis of single-point butt clinched joint with dissimilar aluminium alloy sheets

Study on the mechanical properties and fatigue failure mechanism of 7075-T6 aluminum alloy joints under different joining processes

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