Integrated Blankholder Plate for Double Action Stamping Die
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
A blankholder is used to hold the edges of metal sheet while it is being formed by a matrix and a punch. An efficient way to design a stamping die is to integrate the blankholder plate into the die structure. This would eliminate the time and cost to manufacture blankholder plates. The integrated structure is called integrated blankholder. The main focus of this thesis is structural analysis and optimization of the integrated blankholder. The structural analysis of the integrated blankholder model (used for the production of doors of Volvo car model V70) is performed using Hypermesh and Abaqus. The FE-results were compared with the analytical calculations of the fatigue limit. To increase the stiffness and reduce the stress levels in the integrated blankholder, topology and shape optimization is performed with Optistruct. Thereafter, a CAD model is set up in Catia based on the results of optimization. Finally, structural analysis of this CAD model is performed and the results are compared with the original results. The results show reduction in stress levels by 70% and a more homogeneous stress distribution is obtained. The mass of the die is increased by 17 % and in overall, a stiffer die is obtained. Based on the simulations and results, discussion and conclusions are formulated.
Place, publisher, year, edition, pages
2016. , 82 p.
Finite Element analysis, Optimization, Sheet metal forming.
IdentifiersURN: urn:nbn:se:bth-12149ISRN: BTH-AMT-EX--216/D-03--SEOAI: oai:DiVA.org:bth-12149DiVA: diva2:939548
Volvo Cars,Olofström, Sweden.
Subject / course
MT2525 Masters Thesis (120 credits) in Mechanical Engineering with emphasis on Structural Engineering
MTAMT Master of Science Programme in Mechanical Engineering with emphasis on Structural Mechanics
2016-06-09, J1630, Karlskrona, 09:00 (English)
Pilthammar, Johan, CAE Engineer & Industrial Ph.D. Candidate -Volvo CarsSigvant, Mats, Technical Expert Volvo Cars/BTH
Berghuvud, Ansel, Senior Lecturer