This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Punch Shapes and Cutting Configurations on the Dimensional Accuracy of Punched Holes on an AHSS Sheet
Technical Paper
2018-01-0800
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Dimensional accuracy of punched hole is an essential consideration for high-quality sheet metal forming. An out-of-shape hole can give rise to manufacturing issues in the subsequent production processes thus inducing quality defects on a vehicle body. To understand the effects of punch shapes and cutting configurations on punched hole diameter deviations, a systematical experimental study was conducted for multiple types of AHSS (DP1180, DP980, DP590) and one mild steel. Flat, conical and rooftop punches were tested respectively with three cutting clearances on each material. The measurement results indicated different diameter enlargement modes based on the punch profiles, and dimensional discrepancies were found to be more significant with the stronger materials and higher cutting clearance. To uncover the mechanism of punched hole enlargement, a series of finite element simulations were established for numerical investigation. The diameter change is mainly owing to the spring-back for the additional material deformation induced by punch tip. Its consequent benefits for tool protection from punching induced enlargement will be also discussed.
Recommended Content
Authors
Citation
Pu, C., Jia, Y., Zhou, D., Makrygiannis, P. et al., "Effects of Punch Shapes and Cutting Configurations on the Dimensional Accuracy of Punched Holes on an AHSS Sheet," SAE Technical Paper 2018-01-0800, 2018, https://doi.org/10.4271/2018-01-0800.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| [Unnamed Dataset 1] | ||
| [Unnamed Dataset 2] |
Also In
References
- Pu, C. andGao, Y., “Crystal Plasticity Analysis of Stress Partitioning Mechanisms and their Microstructural Dependence in Advanced Steels,” Journal of Applied Mechanics82(3):031003, 2015, doi:10.1115/1.4029552.
- Karjalainen, J.A.,Mäntyjärvi, K., andJuuso, M., “Punching Force Reduction with Wave-Formed Tools,” Key Engineering Materials344:209-216, 2007, doi:10.4028/www.scientific.net/KEM.344.209.
- Kutuniva, K.,Karjalainen, J.A., andMäntyjärvi, K., “Effect of Convex Sheared Punch Geometry on Cutting Force of Ultra-High-Strength Steel,” Key Engineering Materials504-506:1359-1364, 2012, doi:10.4028/www.scientific.net/KEM.504-506.1359.
- Shih, H.-C.,Chiriac, C., andShi, M.F., “The Effects of AHSS Shear Edge Conditions on Edge Fracture,” MSEC Paper (2010-34062), 2010.
- Shih, H.-C.,Zhou, D., andKonopinski, B., “Effects of Punch Configuration on the AHSS Edge Stretchability,” SAE International Journal Engines 10(2017-01-1705), 2017.
- Shih, H.-C. andShi, M.F., “An Innovative Shearing Process for AHSS Edge Stretchability Improvements,” Journal of Manufacturing Science and Engineering133(6):61018, 2011.
- Yang, G.,Bai, T.,Xu, W.,Li, J.et al., “Dimension Study of Punched Hole Using Conical Tipped Punches, SAE 2016 World Congress and Exhibition,” SAE International, 2016, doi:10.4271/2016-01-0364.
- Pu, C.,Gao, Y.,Wang, Y., andSham, T.-L., “Diffusion-Coupled Cohesive Interface Simulations of Stress Corrosion Intergranular Cracking in Polycrystalline Materials,” Acta Materialia136:21-31, 2017, doi:10.1016/j.actamat.2017.06.058.
- Tian, L.,Russell, A., andAnderson, I., “A Dislocation-Based, Strain-Gradient-Plasticity Strengthening Model for Deformation Processed Metal-Metal Composites,” Journal of Materials Science49(7):2787-2794, 2014.
- Tan, L., “Multiple length and time-scale approaches in materials modeling,” Advance Material (6):1-9, 2016, doi:10.11648/j.am.s.2017060101.11.
- Tan, L.,Acharya, A., andDayal, K., “Modeling of Slow Time-Scale Behavior of Fast Molecular Dynamic Systems,” Journal of the Mechanics and Physics of Solids64(1):24-43, 2014, doi:10.1016/j.jmps.2013.10.013.
- Tian, L.,Anderson, I.,Riedemann, T., andRussell, A., “Modeling the Electrical Resistivity of Deformation Processed Metal-Metal Composites,” Acta Materialia77:151-161, 2014, doi:10.1016/j.actamat.2014.06.013.
- Subramonian, S.,Altan, T.,Ciocirlan, B., andCampbell, C., “Optimum Selection of Variable Punch-Die Clearance to Improve Tool Life in Blanking Non-symmetric Shapes,” International Journal of Machine Tools and Manufacture75:63-71, 2013, doi:10.1016/j.ijmachtools.2013.09.004.
- Falconnet, E.,Chambert, J.,Makich, H., andMonteil, G., “Prediction of Abrasive Punch Wear in Copper Alloy Thin Sheet Blanking,” Wear338-339:144-154, 2015, doi:10.1016/j.wear.2015.06.007.
- Hu, Z.,Lu, W.,Thouless, M.D., andBarber, J.R., “Simulation of Wear Evolution Using Fictitious Eigenstrains,” Tribology International82:191-194, 2015.
- Hu, Z.,Lu, W., andThouless, M.D., “Slip and Wear at a Corner with Coulomb Friction and an Interfacial Strength,” Wear338:242-251, 2015.
- Jia, Y. andBai, Y., “Ductile Fracture Prediction for Metal Sheets Using all-Strain-Based Anisotropic eMMC Model,” International Journal of Mechanical Sciences115-116:516-531, 2016, doi:10.1016/j.ijmecsci.2016.07.022.
- Jia, Y.,Wang, Y., andBai, Y., “A New Combined Isotropic, Kinematic and Cross Hardening Model for Advanced High Strength Steel under Non-Linear Strain Loading Path,” SAE International Journal of Engines10(2):382-390, 2017, doi:10.4271/2017-01-0367.
- Matsuno, T.,Sato, K.,Okamoto, R.,Mizumura, M., andSuehiro, M., “Synergy Effect of Shear Angle and Anisotropic Material Ductility on Hole-Expansion Ratio of High-Strength Steels,” Journal of Materials Processing Technology230:167-176, 2016, doi:10.1016/j.jmatprotec.2015.10.018.
- Jia, Y. andBai, Y., “Experimental Study on the Mechanical Properties of AZ31B-H24 Magnesium Alloy Sheets under Various Loading Conditions,” International Journal of Fracture197(1):25-48, 2016.
- Hedrick, A., “Die Science: Slug Pulling-Causes and Solutions,” (Stamping. Journal, 2015).