翻译1.pdf_第1页
翻译1.pdf_第2页
翻译1.pdf_第3页
翻译1.pdf_第4页
翻译1.pdf_第5页
已阅读5页,还剩1页未读 继续免费阅读

翻译1.pdf.pdf 免费下载

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

Short communication Wrinkling behaviour of interstitial free steel sheets when drawn through tapered dies R Narayanasamy a C Sathiya Narayananb a Department of Production Engineering National Institute of Technology Tiruchirappalli 620 015 Tamilnadu India b Department of Production Engineering J J College of Engineering and Technology Tiruchirappalli 620 009 Tamilnadu India Received 4 January 2005 accepted 8 July 2005 Available online 2 September 2005 Abstract Wrinkling is a mode of failure commonly observed in the forming of sheet metals during deep draw operation An experimental study on wrinkling behaviour of interstitial free IF steels through conical and tractrix dies is discussed in this paper Mechanical properties and drawability parameters of these IF steels were determined and they were correlated with the wrinkling behaviour The limiting draw ratio LDR of these steel sheets were related to the sheet thickness the ratio of punch diameter to sheet thickness the normal anisotropy and the non dimensional parameter which involves punch diameter sheet thickness normal anisotropy and strain hardening exponent The above study of wrinkling behaviour was carried out under two diff erent conditions namely lubri cated and non lubricated and they were compared From the study it is clear that the LDR could be related to the above mentioned parameters 2005 Elsevier Ltd All rights reserved Keywords IF steel Wrinkling Conical die Tractrix die 1 Introduction Wrinkles are often observed in sheet metal forming processes The presence of wrinkles is unacceptable for the fi nal product In the recent years the thinner guage sheets with high strength are used in order to reduce the weight of the products which leads to the formation of buckles and wrinkles during the forming operations The researchers aim to avoid such wrinkles during sheet metal forming Hill s 1 bifurication criterion can be used to predict the formation of wrinkles The onset of fl ange wrinkling was analysed by Needleman 2 by using Swift cup test Several theoretical and experimen tal works have been carried out on the wrinkling behav iour of diff erent materials under diff erent conditions Kim and Son 3 evaluated wrinkling limit diagram WLD of anisotropic sheet by numerical analysis Joao Pedro de Magalhaes Correia and Gerard Ferron 4 investigated the infl uence of plastic anisotropy on the onset of wrinkling Narayanasamy and Sowerby 5 examined the wrinkling behaviour of stainless steel 304 grade dual phase steel and aluminium killed drawing quality steel In this work the wrinkling behaviour of interstitialfree IF steelswiththickness0 6 mm 0 85 mm coated and non coated 0 9 1 2 and 1 6 mm have been studied using conical die and tratrix die using a double action hydraulic press of capacity 2000 kN Interstitial free steels are newly developed steels having verymuchlessamountofcarbonandnitrogen Although aluminium alloys are used for automobiles applications due to their lightweight which contributes 0261 3069 see front matter 2005 Elsevier Ltd All rights reserved doi 10 1016 j matdes 2005 07 005 Corresponding author Tel 91 0431 2501801 fax 91 0431 2500133 E mail addresses narayan nitt edu R Narayanasamy csathiya narayanan yahoo co in C S Narayanan Materials and Design 28 2007 254 259 Materials 6 236 49 2 Triantafyllidis N Needleman A An analysis of wrinkling in the Swift cup test J Eng Mater Technol 1980 102 241 8 3 Kim Y Son Y Study on wrinkling limit diagram of anisotropic sheet metals J Mater Process Tech 2000 97 88 94 4 de Magalhaes Correia JP Ferron G Wrinkling predictions in the deep drawing process of anisotropic metal sheets J Mater Process Technol 2002 128 178 90 5 Narayanasamy R Sowerby R Forming behaviour of some sheet steel materials when drawn through a conical die J Mater Process Technol 1993 39 43 53 6 Uenishi A Teodosiu C Constitutive modelling of the high strain ratebehaviourofinterstitialfreesteel IntJPlasticity 2004 20 915 36 7 Uenishi A Teodosiu C Solid solution softening at high strain rates in Si and or Mn added interstitial free Steels Acta Mater 2003 51 4437 46 8 Feliu Jr S Perez Revenga ML Eff ect of alloying elements Ti Nb Mn and P and the water vapour content in the annealing I F Steels y 2E 05x2 0 0136x 0 2873 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 507090110130150170190210230250 Initial Blank Diameter Sheet Thickness Plastic Strain Increment ratio d r d FORD INDIA LTD TISCO CONICAL DIE DEEP DRAW WRINKLING AREA SAFE AREA Fig 11 Variation of plastic strain increment ratio with dp t0 in conical die I F Steels y 0 0007x2 0 117x 3 5284 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 556065707580859095100 Initial Blank Diameter Sheet Thickness TISCO TRACTRIX DIE DEEP DRAW PRESTRAINED WRINKLING AREA SAFE AREA Plastic Strain Increment ratio d r d Fig 13 Variation of plastic strain increment ratio with dp t0 for prestrained condition sheet in tractrix die I F Steels y 0 0001 x2 0 0325x 0 6541 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 507090110130150170190210230250 Initial Blank Diameter Sheet Thickness FORD INDIA LTD TISCO TRACTRIX DIE DEEP DRAW WRINKLING AREA SAFE AREA Plastic Strain Increment ratio d r d Fig 12 Variation of plastic strain increment ratio with dp t0 in tractrix die 258R Narayanasamy C S Narayanan Materials and Design 28 2007 254 259 atmosphere on the surface composition of interstitial free steels at the galvanising temperature Appl Surf Sci 2004 in press 9 Oudin A Barnett MR Hodgson PD Grain size eff ect on the warm deformation behaviour of a Ti IF steel Mater Sci Eng A 2004 367 282 94 10 Li BL Godfrey A Men

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论