Research on the Electromagnetic Riveting Process of Aluminum Alloy Rivets

2020 ◽  
Vol 10 (07) ◽  
pp. 581-587
Author(s):  
士宁 李
Keyword(s):  
Aluminum Alloy ◽  
Riveting Process ◽  
Electromagnetic Riveting

scholarly journals Numerical Simulation and Parameter Analysis of Electromagnetic Riveting Process for Ti-6Al-4V Titanium Rivet

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 878
Author(s):  
Yangfan Qin ◽  
Yuxuan Liao ◽  
Guangyao Li ◽  
Junjia Cui ◽  
Hao Jiang
Keyword(s):  
Transition Zone ◽  
Radial Displacement ◽  
Structural Parameters ◽  
Parameter Analysis ◽  
Outer Diameter ◽  
Punch Speed ◽  
Driver Plate ◽  
Riveting Process ◽  
Simulation Results ◽  
Electromagnetic Riveting

Electromagnetic riveting process (EMR) is a high-speed impact connection technology with the advantages of fast loading speed, large impact force and stable rivet deformation. In this work, the axisymmetric sequential and loose electromagnetic-structural coupling simulation models were conducted to perform the electromagnetic riveting process of a Ti-6Al-4V titanium rivet, and the parameter analysis of the riveting setup was performed based on the sequential coupled simulation results. In addition, the single-objective optimization problem of punch displacement was conducted using the Hooke–Jeeves algorithm. Based on the adaptive remeshing technology adopted in air meshes, the deformation calculated in the structural field was well transferred to the electromagnetic field in the sequential coupled model. Thus, the sequential coupling simulation results presented higher accuracy on the punch speed and rivet deformation than the loose coupling numerical model. The maximum relative difference of electromagnetic force (EMF) on driver plate and radial displacement in the rivet shaft was 34.86% and 13.43%, respectively. The parameter analysis results showed that the outer diameter and the height of the driver plate had a significant first-order effect on the response of displacement, while the platform height, transition zone height, angle, and transition zone width of the amplifier presented a strong interaction effect. Using the obtained results on the optimal structural parameters, the punch speed was effectively improved from 6.13 to 8.12 m/s with a 32.46% increase. Furthermore, the displacement of the punch increasing from 3.38 to 3.81 mm would lead to an 80.55% increase in the maximum radial displacement of the rivet shaft. This indicated that the deformation of the rivet was efficiently improved by using the optimal rivet model.

Influence of electromagnetic riveting process on microstructures and mechanical properties of 2A10 and 6082 Al riveted structures

2019 ◽  
Vol 19 (4) ◽  
pp. 1284-1294 ◽  
Author(s):  
Dongying Dong ◽  
Liqiang Sun ◽  
Qiong Wang ◽  
Guangyao Li ◽  
Junjia Cui
Keyword(s):  
Mechanical Properties ◽  
Riveting Process ◽  
Microstructures And Mechanical Properties ◽  
Electromagnetic Riveting

Behavior and Quality Evaluation of Electroplastic Self-Piercing Riveting of Aluminum Alloy and Advanced High Strength Steel

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
Ming Lou ◽  
YongBing Li ◽  
YaTing Li ◽  
GuanLong Chen
Keyword(s):  
Shear Strength ◽  
Aluminum Alloy ◽  
High Strength Steel ◽  
High Strength ◽  
Tensile Shear Strength ◽  
Advanced High Strength Steel ◽  
Tensile Shear ◽  
Cold Forming ◽  
Riveting Process ◽  
Cross Tension

The hybrid use of dissimilar lightweight materials, such as aluminum alloy and advanced high strength steel (AHSS), has become a critical approach to reduce the weight of ground transportation vehicles. Self-piercing riveting (SPR) as a preferred cold-forming fastening method is facing problems like weak interlocking and insufficient penetration, due to the reduced formability of AHSS. In this paper, a new process named electroplastic self-piercing riveting (EP-SPR) was proposed to reduce the deformation resistance of AHSS DP780, by applying a direct current (dc) to it during the riveting process. The influence of dc on force and displacement characteristics throughout the riveting process, joint physical attributes and quasi-static performances for two sheet combinations, e.g., AA6061-T6 to DP780 (combination 1) and DP780 to AA6061-T6 (combination 2), were studied and compared with the traditional SPR joints. The results showed that compared with the traditional SPR joints, the EP-SPR ones increased by 12.5% and 23.3% in tensile-shear strength and cross-tension strengths for combination 1, respectively. For combination 2, even though the EP-SPR joints decreased by 5.8% in tensile-shear strength, it could reduce the penetration risk of bottom AA6061-T6, and present a better energy absorption capability for the increased undercut amount. In addition, the corresponding cross-tension strength of EP-SPR joints still increases by 6.1%.

Multi-Field Model of Dual-Coil Electromagnetic Riveting and Riveted Streamline Feature with Annealed 7075 Aluminum Alloy

2021 ◽  
Author(s):  
Dahai Liu ◽  
Haorui Chai ◽  
Zengxin Huang ◽  
Zhenghua Guo ◽  
Yonghui Bai
Keyword(s):  
Aluminum Alloy ◽  
Field Model ◽  
7075 Aluminum Alloy ◽  
Electromagnetic Riveting

Influence of Punch Velocity and Strength Matching on the Quality of SPR with Half-Hollow Rivet Based Numerical Simulation

2013 ◽  
Vol 319 ◽  
pp. 468-473
Author(s):  
Li Juan Xu ◽  
An Cui ◽  
Qiang Yang
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
High Strength ◽  
Material Model ◽  
Element Model ◽  
Vehicle Body ◽  
Punch Velocity ◽  
Riveting Process ◽  
Joint Quality

With the increasing application of lightweight multi-materials in vehicle body, the SPR （self-piercing riveting）with half-hollow rivet is used to connect hybrid metals due to its simple operation and reliable connection. In this paper, appropriate size parameters of half-hollow rivet and die are selected according to sheets’ thickness after the determination of hybrid metal materials, namely FAS2205 dual phase steel, AA2036 aluminum alloy, AA7050 aluminum alloy, AA6061 aluminum alloy and 460E high strength steel. The finite element model of SPR with half-hollow rivets is constructed and the accuracy of which is proved by comparing with the experiment in the relative reference. What’s more, the Johnson-Cook constitutive model is taken as material model to simulate the plastic and hardening behaviors during riveting process. The influence on joint quality of the strength matching of rivet/bottom sheet is studied through numerical simulation and direct observation, and the relationship schematic diagram between them is gained. Meanwhile, the riveting joints at several uniform loading velocities are simulated and the quality of which are analyzed. The research results show that the appropriate matching of rivet to the bottom sheet strength is a key prerequisite for joint quality and the punch velocity plays an important role on the riveting joint quality and efficiency of assembly.

An Analysis of Rivet Die Design in Electromagnetic Riveting

1988 ◽  
Vol 110 (1) ◽  
pp. 65-69 ◽  
Author(s):  
P. G. Reinhall ◽  
S. Ghassaei ◽  
V. Choo
Keyword(s):  
Experimental Study ◽  
Crack Formation ◽  
Radial Component ◽  
Die Design ◽  
Large Strains ◽  
High Quality ◽  
Riveting Process ◽  
Electromagnetic Riveting ◽  
Careful Design

This paper presents the findings of a numerical and experimental study of the quality of 7050-T73 aluminum rivets formed by an extremely fast electromagnetic riveting process. It is found that without careful design of the rivet forming die large strains are produced which cause crack formation in the rivet heads. By the use of finite element and experimental techniques, it is shown that control of the radial component of the flow of material in the rivet head is essential in avoiding crack formation. A rivet die design which is effective in producing high quality, crack free, rivets is proposed.

Sign in / Sign up

Export Citation Format

Share Document