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ICHSF 2025

ICHSF 2025 (10th International Conference on High-Speed Forming) will be the world's first gathering of impulse metalworking experts. Scheduled for August 26 and 27, 2025, it will be held at TU Dortmund, Germany, and will serve as a collaborative forum for researchers and industry players to share innovations in high-speed forming technologies.

Bmax will be attending with its High Performance Pulse (HPP) technology experts - Jean-Paul Cuq Lelandais and Nicolas Mrozowski- as exhibitors through the I-Cube / LNCMI team, along with Eric Giraud, Bmax Business Developer.

Their presence will underline Bmax's leadership in advanced electromagnetic forming and assembly methods. At the conference, they will be talking to technical peers, presenting new perspectives and exploring future partnerships in sectors such as pulsed energy, materials processing and industrial applications.

Full program at the following link: https://ichsf.iul.eu/index.php/conference-program

August 26–27, 2025
9am - 4pm
TU Dortmund University, Germany

Conference presentation

Magnetic Pulse Crimping of Power Cables: Process Simulation & Performance Characterization

 

Abstract : 

Magnetic Pulse Crimping (MPC) represents an interesting alternative to mechanical crimping. This solution is a contactless process using dynamic Lorentz forces induced by high pulse power electrical discharge through a coil. MPC has proven to be effective for cables terminals with both high electrical and mechanical performances. This solution differs from conventional methods for cables with large cross-sections for high voltages especially those manufactured for electric vehicles. The challenge lies in the high thickness of the terminal and the cable to be crimped together while maintaining the performance of the connection during use and ageing, that can be hard to hold with traditional processes. The aim of this work is to characterize the electrical resistance of 120 mm² power cables terminals that are assembled by MPC, with the goal of reducing the process width and potentially reduce the lug mass. First, a numerical study of the process is performed to design and characterize the crimping level depending on main process parameters, in particular through the compaction level of the assembly. Then, an experimental study has been carried out by testing assemblies with different crimping widths and generator energies, in order to reduce the crimped length without degrading the performance and repeatability. For each case, the electrical resistance of the cable/lug interface is measured, before and after exposure to thermal and humidity cycling representative of real-life conditions. The results are compared with samples produced using mechanical crimping to compare the performances and repeatability of each process respectively.

Autors: J.-P. Cuq-Lelandais, N. Innocenti, W. Gage, C. Huteau, G. Daulhac and N. Mrozowski

 

 

Determination of the High Strain Rate Behaviour of a CuCrZr Alloy Using an Electromagnetic Forming Bench Test

 

Abstract : 

A novel electromagnetic forming (EMF) bench test has been developed to characterize the dynamic behaviour of metallic materials. This paper presents the specific case of a CuCrZr wrought alloy, detailing both the experimental approach and the inverse numerical methodology. The primary advantage of the proposed method lies in its ability to calibrate a dynamic material model, which is particularly relevant for forming applications involving thin specimens, with thicknesses as low as 0.6 mm. The well-known Johnson-Cook model is used without consideration of the thermal softening term. The calibration is validated within the strain rate range of [1-4000]s-1. It is indeed shown that this method generates a broad variation of strain rates during the 300 µs test duration. The benefits from using a strain rate sensitive law as opposed to a quasi-static one are also demonstrated.  Analysis of plastic strains and peak stresses further indicates that the EMF test is particularly well-suited for ductile materials, whereas brittle materials may fracture prematurely or fail to deform sufficiently.

 

 

 

Autors:  N. Mrozowski, S. Ferreira, A. Fau, J. P. Cuq-Lelandais, G. Mazars, A. C. Jeanson, R. Pecquois, G. Daulhac, X. Robin

 

 

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