V bükme prosesinde geri esnemeye etki eden proses parametrelerinin deneysel araştırılması

Abstract

Bükülerek şekillendirilmiş DC 01 kalite sac malzemeler; beyaz eşya, mobilya, mutfak, çeşitli ev eşyaları ve otomotiv sektörü başta olmak üzere, endüstride birçok sektörde yaygın olarak kullanılmaktadır. Bükülerek şekillendirilen ürünlerde karşılaşılan en önemli şekillendirme kusuru geri esnemedir. Bu çalışmada; DC01 kalite sac malzemenin V bükme yöntemiyle şekillendirmede oluşan geri esnemeye, ütüleme süresi (0 s, 10 s, 20 s ve 40 s), bükme açısı (15°, 30°, 45°, 60°, 75° ve 90°) ve zımba uç radyüsü (0 mm, 2 mm, 4 mm ve 6 mm) parametrelerinin etkisi deneysel araştırılmıştır. Deneysel çalışmalar sonucunda; geri esnemenin, ütüleme süresinin 10 s. lik artışına bağlı olarak ortalama 0.18° azaldığı, bükme açısının 15°’lik artışına bağlı olarak da ortalama 0.44° arttığı gözlemlenmiştir. Ayrıca geri esnemenin zımba uç radyüsündeki 2 mm.’lik artışa bağlı olarak da ortalama 0.27° arttığı gözlemlenmiştir.

Keywords

• V bükme,Geri esneme,DC01

Experimental investigation of effect of process parameters on springback in v bending process

Abstract

DC01 quality sheet metal parts which were shaped by bending are commonly used in white goods, furniture, kitchen, a variety of household goods and in various industries, particularly the automotive industry. The most important shaping flaw of the bended parts is spring-back. In this study, the effects of holding times (0 s, 10 s, 20 s and 40 s), bending angles (15°, 30°, 45°, 60°, 75° and 90°) and punch radii (0 mm, 2 mm, 4 mm and 6 mm) on spring-back while v bending were investigated. At the end of the experiments the following results were observed; spring-back angles decreased 0.18 degrees on average while the holding times were increasing 10 seconds, spring-back angles increased 0.44 degrees on average while bending angles were increasing 15 degrees. Furthermore, an increase of 2 millimeters in punch radii resulted in an increase in spring-back angles (0.27 degrees on average).

Keywords

• V bending,Springback,DC01

References

1. Ouakdi EH, Louahdi R, Khirani D, Tabourot L. “Evaluation of springback under the effect of holding force and die radius in a stretch bending test”. Materials and Design, 35, 106-112, 2012.
2. Lia X, Yanga Y, Wanga Y, Baoa J, Li S. “Effect of the material-hardening mode on the springback simulation accuracy of V-free bending”. Journal of Materials Processing Technology, 123, 209–211, 2002.
3. Chatti S, Hermi N. “The effect of non-linear recovery on springback prediction”. Computers and Structures, 89, 1367-1377, 2011.
4. Silvestre E, Mendiguren J, Galdos L, SáenzdeArgandoña E. “Comparison of the hardening behaviour of different steel families: From mild and stainless steel to advanced high strength steels”. International Journal of Mechanical Sciences, 101(102), 10-20, 2015.
5. Husmann T, Magnus CS. “Thermography in incremental forming processes at elevated temperatures”. Measurement, 77, 16-28, 2016.
6. Long H, Hua Y, Jin X, Shao J, Zhu H. “Effect of holding time on microstructure and mechanical properties of resistance spot welds between low carbon steel and advanced high strength steel”. Computational Materials Science, 117, 556-563, 2016.
7. ASM Handbook Committee. ASM Handbook Vol 14: Forming and Forging. 9th ed. USA, ASM International, 1996.
8. Garcia-Romeu ML, Ciurana J, Ferrer I. “Springback determination of sheet metals in an air bending process based on an experimental work”. Journal of Materials Processing Technology, 191, 174-177, 2007.

9. Krinninger M, Opritescu D, Golle R, Volk W. “Experimental investigation of the influence of punch velocity on the springback behavior and the flat length in free bending”. Procedia CIRP, 41, 1066-1071, 2016.
10. Zong Y, Liu P, Guo B, Shan D. “Springback evaluation in hot v-bending of Ti-6Al-4V alloy sheets”. International Journal of Advanced Manufacturing Technology, 76, 577-585, 2014.
11. Buang MS, Abdullah SA, Saedon J. “Effect of die and punch radius on springback of stainless steel sheet metal in the air v-die bending process”. Journal of Mechanical Engineering and Sciences, 8, 1322-1331, 2005.