Influence of process parameters in mechanical clinching with extensible dies

Lambiase, F.

doi:10.1007/s00170-012-4486-4

Cited by 106 publications

(62 citation statements)

References 17 publications

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“…Following (Lambiase, 2013), the fixed anvil reduces the material flow in joining direction (die depth 2.0 mm). The opening lamellae (diameter 7.0 mm) enable a lateral extrusion of the punch-sided material and the holding of the die-sided slug.…”

Section: Materials and Specimensmentioning

confidence: 99%

Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

Hörhold¹,

Mûller²,

Merklein³

et al. 2017

JMSR

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Economic conditions as well as comfort and safety-related requirements lead to lightweight design especially in automotive body-in-white production processes. The consequential multi-material mix limits the reliability of conventional thermal joining technologies. Innovative mechanical joining technologies need to be established. Following the lightweight-design requirements, next step for weight-reduction would be the renunciation of additional elements. Clinching technologies support this idea by creating a form-and force-fitting joint, but are limited to the formability of the joining partners. Joining by forming without additional elements even of hot formed ultra-high-strength manganese steels and ductile aluminium can be realised by shear-clinching. A precisely coordinated tool setup initialises a crack in the die-sided material with limited formability without harming the punch-sided ductile aluminium. This paper presents current and detailed investigations of the influences of mechanical loads on strength capacity of multi-material joints using shear-clinching technologies. The results clearly show the promising potential and challenges of this innovative single-step joining technology for multi-material mixes.

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Section: Materials and Specimensmentioning

confidence: 99%

Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

Hörhold¹,

Mûller²,

Merklein³

et al. 2017

JMSR

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“…high depth on die anvil [18,27] either sharp punch corner radius [25], may result in poor mechanical behaviours of the clinched connections that are likely to fail by neck fracture. On the other hand, small interlocks, stem from improper geometry of the clinching tools [33], low values of the forming force [21], high difference in the flow stress between the two sheets [16] may also affect the mechanical strength of clinched connections which are likely to fail by button separation [34]. The conditions promoting the formation of large interlocks generally affect the neck thickness negatively and vice versa; therefore, the optimal processing conditions that maximize the mechanical behaviours of clinched connection represent a tradeoff between high values of interlock and neck thickness.…”

Section: Characterization Of Clinched Connectionsmentioning

confidence: 99%

“…different metals [14][15][16], metalpolymer [17,18], metal-wood [19] and metal-composites [20]. This process involves the adoption of simple equipment mainly consisting in a punch (circular or rectangular) and a die (which may be round-grooved, round split [21], flat [16,22,23] or shear [24]). The punch is forced against the punch-sided sheet to form an interlock with the die-sided sheet.…”

Section: Introductionmentioning

confidence: 99%

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

Lambiase

2015

Int J Adv Manuf Technol

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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.

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“…Lambiase and colleague [10,11]. Clinched joints were produced under different forming loads to evaluate the evolution of the joints' profile experimentally.…”

Section: Introductionmentioning

confidence: 99%

Investigations of strength and energy absorption of clinched joints

Zhao

Yang

et al. 2014

Computational Materials Science

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With an increasing application of clinching in different industrial fields, the demand for a better understanding of the knowledge of static and dynamic characteristics of the clinched joints is required. In this paper, the clinching process and tensile-shear failure of the clinched joints have been numerically simulated using finite element (FE) method. For validating the numerical simulations, experimental tests on specimens made of aluminium alloy have been carried out. The results obtained from tests agreed fairly well with the computational simulation. Tensileshear tests were carried out to measure the ultimate tensile-shear strengths of the clinching joints and clinching-bonded hybrid joints. Deformation and failure of joints under tensile-shear loading were studied. The normal hypothesis tests were performed to examine the rationality of the test data. This work was also aimed at evaluating experimentally and comparing the strength and energy absorption of the clinched joints and clinching-bonded hybrid joints.

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Influence of process parameters in mechanical clinching with extensible dies

Cited by 106 publications

References 17 publications

Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

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

Investigations of strength and energy absorption of clinched joints

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