Meso-scaled progressive forming of bulk cylindrical and flanged parts using sheet metal

Chan, Wai Ming; Fu, Ming

doi:10.1016/j.matdes.2012.07.004

Cited by 50 publications

(38 citation statements)

References 31 publications

(37 reference statements)

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“…To ensure the precise positioning, guide holes are created on the edge of the strip and guide pins are used along the different stages in the process. Progressive microforming system for fabrication of (a) micro-scale flanged parts [4,5] and (b) two-level flanged part [10,11].…”

Section: Characteristic Of Progressive Microformingmentioning

confidence: 99%

“…It can be found that the deformation load of the as-received sheet metal is larger than that of the annealed ones. This is attributed to the fact 09001-p. 4 ICNFT 2015 Figure 6. Dimensional variation of the flanged part: (a) diameter and (b) length [11].…”

Section: Deformation Behaviourmentioning

confidence: 99%

“…The blanked surfaces of the materials with different states in the blanking process, the third operation of the progressive forming developed by Chan and Fu [4,5], are shown in Fig. 7.…”

Section: Fracture Surfacementioning

confidence: 99%

“…To explore this process, Hirota [3] extruded micro-billet via pressing the sheet material in thickness direction. Fu and Chan [4,5] further examined the feasibility of this process to fabricate the meso-and micro-scaled parts by directly using sheet metal, and identified its characteristics via scaling down the part size and using the materials with different grain sizes. Ghassemali et al [6][7][8][9] further developed this process to manufacture the micro-pins by directly using copper strip, which consists of two simple steps, including extrusion and blanking.…”

Section: Introductionmentioning

confidence: 99%

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Review on progressive microforming of bulk metal parts directly using sheet metals (Keynote Paper)

Meng

2015

MATEC Web of Conferences

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Abstract. Due to the ubiquitous trend of product miniaturization, energy saving and weight reduction, micro/meso-scale parts have been widely used in many industrial clusters. Micromanufacturing processes for production of such micro/meso-scale parts are thus critically needed. Microforming, as one of these micro manufacturing processes, is a promising process and thus got many explorations and researches. Compared with the research on size effect affected deformation behaviours, less attention has been paid to the process development for mass production of micro-parts. The product quality and fabrication productivity of micro-parts depend on the involved process chain. To address the difficulty in handling and transporting of the micro-sized workpiece, development of a progressive microforming process for directly fabricating bulk micro-parts using sheet metals seems quite promising as it avoids or facilitates billet handling, transportation, positioning, and ejection in the process chain. In this paper, an intensive review on the latest development of progressive microforming technologies is presented. First of all, the paper summarizes the characteristic of progressive microforming directly using sheet metal. The size effect-affected deformation behaviour and the dimensional accuracy, deformation load, ductile fracture, and the surface finish of the microformed parts by progressive microforming using sheet metals are then presented. Finally, some research issues from the implementation of mass production perspective are also discussed.

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Section: Characteristic Of Progressive Microformingmentioning

confidence: 99%

Section: Deformation Behaviourmentioning

confidence: 99%

“…The blanked surfaces of the materials with different states in the blanking process, the third operation of the progressive forming developed by Chan and Fu [4,5], are shown in Fig. 7.…”

Section: Fracture Surfacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Review on progressive microforming of bulk metal parts directly using sheet metals (Keynote Paper)

Meng

2015

MATEC Web of Conferences

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“…In their paper, the analysis of the micro-geometry forming was done in the closed coining die with the assumed plane state of strain. Many papers are concerned with the study of the size effects in micro-forming, [7] and [11] to [13], and their influence on the various microforming processes, such as micro-indentation [14], micro-imprinting [15], micro-extrusion, [16] and [17], and the bulk forming processes of sheet metal, [18] and [19]. However, relatively few works deal with the coining process and the real problems of production, such as residual stress, elastic deformation and incomplete die filling, [1] to [3], [10] and [20] to [22], lubricant residues and surface damage [23], and tool development and manufacturing, [24] and [25].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Model Force Prediction in Closed Die Coining Process

2018

SV-JME

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A Review on Micro/Nanoforming to Fabricate 3D Metallic Structures

Wang

et al. 2020

Advanced Materials

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With the rapid development of micro‐electromechanical systems (MEMS), micro/nanoscale fabrication of 3D metallic structures with complex structures and multifunctions is becoming more and more important due to the recent trend of product miniaturization. As a promising micromanufacturing approach based on plastic deformation, micro/nanoforming shows the attractive advantages of high productivity, low cost, near‐net‐shape, and excellent mechanical properties, compared with other non‐silicon‐based micromanufacturing technologies. However, micro/nanoforming is far less established due to the so‐called size effects in terms of materials models, process laws, tooling design, etc. The understanding of basic issues on micro/nanoforming is not yet mature, and it is currently a topic of rigorous investigation. Here, a systematic review on the micro/nanoforming processes of 3D structures with multifunctional properties is presented, wherein also a critical examination of the interplay between relevant length scales and size effects affecting the structural integrity of micro/mesoscale metallic systems is also provided. Finally, the challenges of micro/nanoscale fabrication are proposed, including the development trends of new micro/nanoforming processes, multiple field coupling effects, and theoretical modeling at the trans‐scale.

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Meso-scaled progressive forming of bulk cylindrical and flanged parts using sheet metal

Cited by 50 publications

References 31 publications

Review on progressive microforming of bulk metal parts directly using sheet metals (Keynote Paper)

Review on progressive microforming of bulk metal parts directly using sheet metals (Keynote Paper)

Accuracy of Model Force Prediction in Closed Die Coining Process

A Review on Micro/Nanoforming to Fabricate 3D Metallic Structures

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