High Speed Blanking: An Experimental Method to Measure Induced Cutting Forces

Camille Gaudilliere (1) , Nicolas Ranc (1) , Arnaud Larue (1) , A Maillard (2) , Philippe Lorong (1)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
2 CETIM - CEntre Technique des Industries Mécaniques

A new blanking process that involves punch speed up to 10 ms −1 has obvious advantages in increased productivity. However, the inherent dynamics of such a process makes it difficult to develop a practical high speed punch press. The fracture phenomenon governing the blanking process has to be well understood to correctly design the machine support and the tooling. To observe this phenomenon at various controlled blanking speeds a specific experimental device has been developed. The goal is to measure accurately the shear blanking forces imposed on the specimen during blanking. In this paper a new method allowing the blanking forces to be measured and taking into account the proposed test configuration is explained. This technique has been used to determine the blanking forces experienced when forming C40 steel and quantifies the effect of process parameters such as punch die clearance, punch speed, and sheet metal thickness on the blanking force evolution.

Mots clés: High speed blanking; Blanking force; measurement; Hopkinson device

Domaines: Mécanique [physics.med-ph]; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]

Camille Gaudilliere, Nicolas Ranc, Arnaud Larue, A Maillard, Philippe Lorong. High Speed Blanking: An Experimental Method to Measure Induced Cutting Forces. Experimental Mechanics, 2013, 53 (7), pp.1117-1126. ⟨10.1007/s11340-013-9738-1⟩. ⟨hal-00986953⟩