Intelligent sheet stamping process using segment blankholder modules

Yagami, Tetsuya; Manabe, Ken‐ichi; Yang, Ming; Koyama, Hiroshi

doi:10.1016/j.jmatprotec.2004.04.144

Cited by 39 publications

(11 citation statements)

References 6 publications

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“…Figure 1 shows sensors for measuring the draw-in displacements at the flange corner portion and at the flange straight side portion, which can measure two typical draw-in displacements at different flange ends in the process of the square cup deep drawing. (5,6) In addition to the vertical load of the punch load and punch displacement and the vertical displacement of each segment part of the divided blank holder (BH), the fuzzy control of the BH under the momentary sensing data of these two flange draw-in displacements mentioned above is performed to confirm the enhancement effect on the deep drawability.…”

Section: Sheet Stampingmentioning

confidence: 99%

Sensors and Their Real In-process Control Application to Advanced Deformation Processing

Manabe¹,

Oguchi²

2019

Sensors and Materials

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To promote the "Connected Industries" project by utilizing the Internet of Things (IoT) and artificial intelligence (AI) systems, sensing of various deformation process information during processing is required to develop advanced metal forming technology in the deformation processing field. In recent years, sensors and sensing systems based on new sensing principles have been studied and developed. In this paper, a state-of-the-art typical sensor and its system applicable to metal forming processes are described, in which it is difficult to visualize the processing conditions and material deformation state inside dies. Also, the issues and initiatives for intelligent metal forming processes are introduced. In addition, we discuss the advantages and necessity of advanced in-process intelligent control metal processing technology with sensors embedded into a practical forming machine.

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Section: Sheet Stampingmentioning

confidence: 99%

Sensors and Their Real In-process Control Application to Advanced Deformation Processing

Manabe¹,

Oguchi²

2019

Sensors and Materials

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“…While the elastic binder (Doege et al, 2001) focused on generating homogeneous binder pressure on the blank of the sheet metal, a segmented blank holder (or flexible binder) is able to accomplish control of one segment while not being significantly influenced by the variation and distribution of other segments. Yagami et al (2004) employed segmented blank holder modules to control the material flow into the die cavity, enhancing the effect of the BHF control and improving formability in the stamping process. They obtained fuzzy blank holder pressure (BHP) trajectories for each blank holder segment and showed that the distributed BHP method can improve wall thickness distribution.…”

Section: Segmented Blank Holder Systemmentioning

confidence: 99%

Advances in the Control of Sheet Metal Forming

Lim

Venugopal²,

Ulsoy

2008

IFAC Proceedings Volumes

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“…ELEND et al [16] show, that a pliable blank holder system with defined local stiffness leads, in comparison to a rigid blank holder, to a more homogeneous contact pressure distribution as well as to an enlargement of the safe process window and stability. In addition, several authors [17][18][19] report the potential of active blank holder systems, which enable in-process adjustment of local material flow due to variation of local blank holder forces. Similar, in this paper we study how modifications of the clamping tools allow us to influence the forming zone of bending processes.…”

Section: Intr Introduction Oductionmentioning

confidence: 99%

Influencing the forming zone by altering the contact pressure in a bending process

Frohn-Sörensen¹,

Reuter²,

Engel³

2021

Esaform 2021

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In a modern production environment, flexible manufacturing methods are important because an overall trend towards mass customization and on-demand production is observed. Kinematic and incremental forming methods with generic tools can provide a large product variation but a deeper understanding of the forming mechanisms is required for process modelling, e.g. Incremental Swivel Bending (ISB). Particularly crucial is to identify the influences on the forming zone in order to purposefully control the material flow of a forming process. For a bending process where the bending moment is transmitted by clamping tools, this paper presents a method to alter the contact pressure distribution in order to affect the angular size and strain gradient of the forming zone. In the light of these results, the presented method can be deployed for a tooling with adaptive contact pressure to directly influence material flow, in particular using generic tools to overall provide a better control of flexible forming methods.

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Intelligent sheet stamping process using segment blankholder modules

Cited by 39 publications

References 6 publications

Sensors and Their Real In-process Control Application to Advanced Deformation Processing

Sensors and Their Real In-process Control Application to Advanced Deformation Processing

Advances in the Control of Sheet Metal Forming

Influencing the forming zone by altering the contact pressure in a bending process

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