On a reshaping method of clinched joints to reduce the protrusion height

The joinability of different rigid thermoplastic polymers with aluminium AA6082-T6 alloy sheets by mechanical clinching is investigated. The polymers were heated using a convective source prior of clinching. Experimental tests were conducted by varying die geometry and preheating time. The joinability window for different thermoplastic polymers including polystyrene (PS), polycarbonate (PC) and poly(methyl methacrylate) (PMMA) was determined. The mechanical behaviours of clinched connections were assessed by means of single lap shear tests. To understand the effect of process parameters on the mechanical behaviours of clinched joints, dimensional analysis was also carried out. It was turned out that mechanical clinching could be successfully employed for joining thermoplastic polymer sheets with aluminium sheets being characterized by a very short processing time and producing high strength joints as compared to competitive technologies. The formability of the aluminium alloy and the toughness of the polymer component are crucial for the success of the process. However, even materials with reduced formability were joined by modifying conveniently the preheating time and die geometry.

Section: Methodsmentioning

confidence: 99%

Joinability of different thermoplastic polymers with aluminium AA6082 sheets by mechanical clinching

Lambiase

2015

“…Recently, Wen et al [48] dealt with reshaping conventional clinching joints to decrease the clinched bulge as shown in Fig. 18.…”

Section: Recent Development Of Clinching Joining Technologiesmentioning

confidence: 99%

“…Reshaping the tool geometry played a major role in the strength of the reshaped clinching joints [48]. Lee et al [49,50] developed a new mechanical joining method called "hole clinching" for connecting dissimilar materials.…”

Section: Recent Development Of Clinching Joining Technologiesmentioning

confidence: 99%

“…18 a Conventional clinching joint (right) and clinching joint after reshaping (left). b Final view of the clinching joints before and after reshaping [48] Fig. 19 Illustration of the Hole clinching technology [49] Moreover, a 3D model was used to simulate the tensileshear test using ANSYS commercial software whereas the button separation and neck fracture failure mode were investigated.…”

Section: Finite Element Simulation Of the Clinching Processmentioning

confidence: 99%

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Clinching process for joining dissimilar materials: state of the art

Eshtayeh

Hrairi

Mohiuddin

2015

Clinching is a method for mechanically joining sheet metal of different thickness and properties in which the two plates to be joined undergo plastic deformation. The clinching process is established by connection or joining using simple tools: a punch and a die. This method has different characteristics compared to thermal joining methods, such as spot welding, including low purchase and operating costs, little preparatory work, safe and environmentally friendly, interesting mechanical properties, reproducibility, and durability. In this article, a brief review of traditional joining methods for dissimilar materials and the clinching process are illustrated in greater detail. In addition, the article looks to guide researchers for future work by identifying weaknesses of the current processes as well as potential for valuable contributions in the field of clinching.

“…A new study concerning the clinching joint simulation and the reshaping of the clinched point was investigated numerically using DEFORM-2D by Wen et al [49]. The conventional clinching process and the reshaping approach were considered to be elastic-plastic large deformation processes.…”

Section: Optimization Of the Clinching Processmentioning

confidence: 99%

Recent and future development of the application of finite element analysis in clinching process

Eshtayeh

Hrairi

2015

Clinching is a mechanical joining method using a simple toolset consisting of a punch, a die, and a blank holder. The shapes of these tools are the most important parameters that control the final geometry of the clinch joints and consequently the strength and quality of the latter. In order to save time and cost, these geometric parameters could be optimized by the use of finite element simulation. This paper reviews the published research related to the finite element modeling of the clinching process. In this study, a critical review of the latter had been carried out from different perspectives. The findings about difficulties facing the simulations of different clinching processes, the optimization of the process parameters, and the strength, joinability, and the quality of the joint were highlighted. In addition, future development, investigation, and more research are still needed to minimize problems and expenses in the industrial practical application of clinching.