SINGLE POINT INCREMENTAL FORMING SPRINGBACK REDUCTION USING EDGE STIFFENER

被引:0
|
作者
Grimm, Tyler J. [1 ]
Parvathy, Gowtham V. [1 ]
Mears, Laine [1 ]
机构
[1] Clemson Univ, Int Ctr Automot Res, Greenville, SC 29607 USA
来源
PROCEEDINGS OF THE ASME 2020 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2020, VOL 2A | 2020年
关键词
FORMABILITY;
D O I
暂无
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Single point incremental forming (SPIF) is a dieless forming process which uses local deformations to form complex geometries. This is achieved through the use of a typically hemispherical tipped forming tool. Several variations of SPIF have been developed to improve the performance of this process. This includes the use of a partial die which is placed on the back-side of the material. The forming tool is then able to press the material into this partial die. Another method is to utilize a clamping fixture with a periphery that closely matches that of the desired geometry. While both of these methods improve the performance of SPIF, they also require dedicated fixturing. While these modifications still present an advantage over traditional stamping, it is desirable to avoid the use of any geometry-specific equipment. Springback is a significant issue when performing traditional SPIF. Springback can occur in two different ways: local and global. Local springback results from the elastic deformations created outside the region located directly beneath the forming tool. This causes poor accuracy as a result. Compensation methods have been developed to overcome this type of springback but are faced with certain limitations. Global springback refers to the springback experienced once the material is removed from its clamping fixture. This springback is a result of all residual stresses produced during forming. This springback is much more difficult to reduce and often requires annealing the workpiece subsequent to forming. A toolpath approach is explored herein as a method to reduce springback without the use of geometry-specific equipment. The toolpath developed begins at the edge of the clamping fixture, regardless of the geometry shape, and forms the flashing material prior to the desired geometry. By starting the toolpath along the edge of the fixture, elastic deformations are minimized. Additionally, the work hardening produced during this forming acts as a stiffener for the desired geometry, which behaves as a frame which matches the periphery of the desired geometry. This method was experimentally tested for its accuracy improvements when forming a truncated pyramid from 5052 aluminum. The angle of this stiffener, the step size of the stiffener, and the size of the desired geometry were varied. The fixture dimensions were held constant. This method was found to reduce the overall springback of the part and increase the accuracy of the resulting geometry. Furthermore, it was found that a large step size can be used to form the stiffener section of the part. By using a large step size, the time it takes to form this sacrificial region is minimized.
引用
收藏
页数:9
相关论文
共 50 条
  • [1] Optical study for springback prediction, thickness reduction and forces variations on single point incremental forming
    Rosca, Nicolae
    Oleksik, Valentin
    Pascu, Adrian
    Oleksik, Mihaela
    Avrigean, Eugen
    MATERIALS TODAY-PROCEEDINGS, 2019, 12 : 213 - 218
  • [2] An intelligent process model: predicting springback in single point incremental forming
    Muhamad S. Khan
    Frans Coenen
    Clare Dixon
    Subhieh El-Salhi
    Mariluz Penalva
    Asun Rivero
    The International Journal of Advanced Manufacturing Technology, 2015, 76 : 2071 - 2082
  • [4] An intelligent process model: predicting springback in single point incremental forming
    Khan, Muhamad S.
    Coenen, Frans
    Dixon, Clare
    El-Salhi, Subhieh
    Penalva, Mariluz
    Rivero, Asun
    INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2015, 76 (9-12): : 2071 - 2082
  • [5] Springback Reduction by Annealing for Incremental Sheet Forming
    Zhang, Zixuan
    Zhang, Huan
    Shi, Yi
    Moser, Newell
    Ren, Huaqing
    Ehmann, Kornel F.
    Cao, Jian
    44TH NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE, NAMRC 44, 2016, 5 : 696 - 706
  • [6] Springback Effects during Single Point Incremental Forming: Optimization of the Tool Path
    Giraud-Moreau, Laurence
    Belchior, Jeremy
    Lafon, Pascal
    Lotoing, Lionel
    Cherouat, Abel
    Courtielle, Eric
    Guines, Dominique
    Maurine, Patrick
    PROCEEDINGS OF 21ST INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING (ESAFORM 2018), 2018, 1960
  • [7] ELECTRICALLY ASSISTED GLOBAL SPRINGBACK ELIMINATION AFTER SINGLE POINT INCREMENTAL FORMING
    Neveux, Trey
    Ruszkiewicz, Brandt J.
    Grimm, Tyler
    Roth, John T.
    Ragai, Ihab
    PROCEEDINGS OF THE ASME 11TH INTERNATIONAL MANUFACTURING SCIENCE AND ENGINEERING CONFERENCE, 2016, VOL 1, 2016,
  • [8] Analysis of Springback and Force behavior in Single Point Incremental Sheet Forming though FEA
    Deokar, Swapnil U.
    Jain, Prashant K.
    Tandon, Puneet
    Pathak, Abhyudaya
    MATERIALS TODAY-PROCEEDINGS, 2019, 18 : 3330 - 3339
  • [9] THE EFFECT OF MULTI-POINT ELECTRICAL PATHS ON GLOBAL SPRINGBACK ELIMINATION IN SINGLE POINT INCREMENTAL FORMING
    Niebauer, Jacklyn
    Shaffer, Derek
    Ragai, Ihab
    Roth, John T.
    PROCEEDINGS OF THE ASME 12TH INTERNATIONAL MANUFACTURING SCIENCE AND ENGINEERING CONFERENCE - 2017, VOL 1, 2017,
  • [10] Incrementally Formed Stiffeners Effect on the Reduction of Springback in 2024-T3 Aluminum after Single Point Incremental Forming
    Ruszkiewicz, Brandt J.
    Dodds, Sean S.
    Reese, Zachary C.
    Roth, John T.
    Ragai, Ihab
    PROCEEDINGS OF THE ASME 10TH INTERNATIONAL MANUFACTURING SCIENCE AND ENGINEERING CONFERENCE, 2015, VOL 1, 2015,