FE simulation of shape accuracy using the Multi-Point Stretch-Forming process

Wang, Shao Hui; Cai, Zheng-Li; Li, Ming Zhe

doi:10.1504/ijmpt.2010.032101

Cited by 11 publications

(13 citation statements)

References 7 publications

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“…Numerous attempts [15][16][17][18] have been made to study the effect of cushion thickness, pin head radius, the number of pins, and transition length (Figure 1) on shape error and deformation behavior using the FEA, and the following conclusions are drawn:…”

Section: Introductionmentioning

confidence: 99%

Component specific elastic cushion design to enhance the accuracy with the usage of reconfigurable tools in stretch forming

Shivaprasad

Praveen

Reddy

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Multi-point stretch forming (MPSF) is a flexible manufacturing technology that uses reconfigurable tools to produce a variety of three-dimensional sheet metal components. An elastic cushion is placed between the surfaces of reconfigurable tool and the sheet metal to reduce the possibility of dimple formation. It is well known that elastic cushion deformation behavior significantly affects the accuracy and surface quality of components. In the present work, a component-specific elastic cushion is designed to achieve better conformability between the pin heads and cushion (by scooping out the material from the flat cushion selectively). An analytical model is developed to determine the volume of material to be scooped out and its location based on pin head and component geometries. To demonstrate the effectiveness of the developed methodology, finite element analysis (FEA) is performed to form double curvature (spherical) component with a cushion of constant thickness and a component-specific cushion with different pin matrix sizes. Results indicate that the deformation is more uniform with significant improvement in shape accuracy of the component formed with a component-specific cushion.

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Section: Introductionmentioning

confidence: 99%

Component specific elastic cushion design to enhance the accuracy with the usage of reconfigurable tools in stretch forming

Shivaprasad

Praveen

Reddy

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…To meet the demand of forming parts with different size or shape using only one set of forming tool, the discrete die has been introduced into the stretch forming process. Cai and co-workers [19][20][21][22] proposed a new flexible sheet forming process named multi-point stretch forming (MPSF) and conducted systematic research, in which the solid die in traditional stretch forming is substituted by a matrix of punch elements with hemispherical tips, that is, MPD. Later, Li et al 23 proposed a forming process of multi-gripper flexible stretch forming (MGFSF), in which Pascal's law of multi-cylinder hydraulic system, strain hardening, and minimal resistance force of the material are employed.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation for the flexible stretch-stamp forming process of sheet metal

Wang

Liu

2019

Advances in Mechanical Engineering

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Flexible stretch-stamp forming is a sheet metal forming method derived from flexible stretch forming and multi-point forming, aimed at solving wrinkling defects of large skin parts especially with complex curvatures, prone to occur in the later type of forming processes. To help understand the forming principle and forming characteristics of flexible stretchstamp forming, a large sheet metal part with wavelike surface was selected as the study object and extensive numerical simulations have been conducted using a general commercial finite element software. The main processing parameters of pre-stretching force and wrapping force, respectively, exerted by horizontal and sloping cylinders on forming quality were investigated in detail. Finally, experiments were conducted to estimate the forming performances of flexible stretch-stamp forming.

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“…Good correlation is achieved between the finite element (FE) results and experimentally measured thickness–thinning in the formed part. Wang et al 20 carried out a series of numerical simulations on MPSF processes where the shape error and non-uniformity in thickness distribution of the sheet metal part were analyzed. The results show the influences of the punch element size, the sheet metal thickness and the elastic cushion on the forming results.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of stamping die components using evolutionary structural optimization method

Azamirad

Arezoo

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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Today, die design standards are used to design the structure of die components. These standards are usually based on high safety factors. So, the die components are often heavier and larger than required. In this article, a software package is developed which can design an appropriate topology of body structure of stamping die components with a reduced weight. This is done by implementing the evolutionary structural optimization algorithm. The proposed structure can also be modified by the designer to accommodate for a simpler casting method. This software package is developed in Microsoft Visual C# programming environment with a link to Abaqus software to analyze the finite element simulation of the process. The operation of the software is demonstrated by an example where the die for a sheet metal part is studied. The die components are initially designed, analyzed and compared with the standard die (the die which is in general use today). The final results show a reduction of 37% of volume and 8% of maximum displacement, respectively.

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FE simulation of shape accuracy using the Multi-Point Stretch-Forming process

Cited by 11 publications

References 7 publications

Component specific elastic cushion design to enhance the accuracy with the usage of reconfigurable tools in stretch forming

Component specific elastic cushion design to enhance the accuracy with the usage of reconfigurable tools in stretch forming

Numerical investigation for the flexible stretch-stamp forming process of sheet metal

Topology optimization of stamping die components using evolutionary structural optimization method

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