Deep drawing of cylindrical cups using polymer powder medium based flexible forming

Zhang, Canbin; Gong, Feng

doi:10.1007/s40684-018-0007-8

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…The fabrication of such sheet metal components by means of sheet metal die is commonly classified according to the utilization of die bending, die deep-drawing, and die cutting processes [1]. Based on these processes, and through the associated experiments and finite element method (FEM) techniques, many studies have been carried out by researchers and engineers to overcome the major defects that occur on these sheet metal components [2][3][4][5][6] as well as to improve the formability for each sheet metal forming process [7][8][9][10]. In the present research, we focused on the deep drawing process.…”

Section: Introductionmentioning

confidence: 99%

Multi Draw Radius Die Design for Increases in Limiting Drawing Ratio

Phanitwong

Thipprakmas

2020

Metals

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As a major sheet metal process for fabricating cup or box shapes, the deep drawing process is commonly applied in various industrial fields, such as those involving the manufacture of household utensils, medical equipment, electronics, and automobile parts. The limiting drawing ratio (LDR) is the main barrier to increasing the formability and production rate as well as to decrease production cost and time. In the present research, the multi draw radius (MDR) die was proposed to increase LDR. The finite element method (FEM) was used as a tool to illustrate the principle of MDR based on material flow. The results revealed that MDR die could reduce the non-axisymmetric material flow on flange and the asymmetry of the flange during the deep drawing process. Based on this material flow characteristic, the cup wall stretching and fracture could be delayed. Furthermore, the cup wall thicknesses of the deep drawn parts obtained by MDR die application were more uniform in each direction along the plane, at 45°, and at 90° to the rolling direction than those obtained by conventional die application. In the present research, a proper design for the MDR was suggested to achieve functionality of the MDR die as related to each direction along the plane, at 45°, and at 90° to the rolling direction. The larger draw radius positioned for at 45° to the rolling direction and the smaller draw radius positioned for along the plane and at 90° to the rolling direction were recommended. Therefore, by using proper MDR die application, the drawing ratio could be increased to be 2.75, an increase in LDR of approximately 22.22%.

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Section: Introductionmentioning

confidence: 99%

Multi Draw Radius Die Design for Increases in Limiting Drawing Ratio

Phanitwong

Thipprakmas

2020

Metals

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“…The plastic micro optical components of the same function are inexpensive and easily produced in quantity, and can be integrated with the existing optoelectronic components to form a micro optical mechanical and electrical system [1][2][3]. Due to the wide application of plastic polymer embossing and forming technology [4][5][6] in microstructure array components and vast market demands, two kinds of embossing and replicating form technology (plane type and roller type) are commonly used. However, compared to the plane embossing technology, the roller type embossing technology [7][8][9][10][11][12][13][14][15][16][17] has the advantages of continuous mass production and shortened embossing duration.…”

Section: Introductionmentioning

confidence: 99%

Development of Belt-Type Microstructure Array Flexible Mold and Asymmetric Hot Roller Embossing Process Technology

Weng

2019

Coatings

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This study proposed the belt-type microstructure array flexible mold designed hot roller embossing process technology. An extrusion molding system was integrated with belt-type hot roller embossing process technology and, deriving the asymmetric principle as the basis of prediction, designed a belt-type microstructure array hot roller embossing process system. This study first focused on the design and manufacturing of a belt-type hot roller embossing process system (roll to belt-type). It then carried out system integration and testing, along with the film extrusion system, to fabrication microstructure array production. Hot embossing was used to replicate the array of the plastic micro lens as the microstructure mold. The original master mold was fabricated with micro electromechanical technology and the PC micro lens array as the microstructure (inner layer) film using the gas-assisted hot embossing technology. A microstructure composite belt and magnetic belt were produced on the hot roller embossing by an innovated coated casting technique. The forming accuracy of the belt-type microstructure array flexible mold hot roller embossing process and the prediction precision of numerically simulated forming were discussed. The proposed process technology is expected to effectively reduce the process cycle time with the advantages of being a fast and continuous process.

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