Microdeep drawing of C1100 microsquare cups using microforming technology

Ma, Jiang; Gong, Feng; Yang, Zhi; Zeng, Wenqin

doi:10.1007/s00170-015-7476-5

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…Based on these reasons, to prevent the fracture and increase in deep drawing formability, the prevention of cup wall stretching and flange wrinkle should be strictly considered. As per previous studies [11,19,20], the working process parameters on deep drawing process, i.e., blankholder pressure, lubricant, and draw radius, were investigated. However, as aforementioned, the anisotropy property of the material in each direction along the plane, at 45 • , and at 90 • to the rolling direction related to draw radius die design for reducing the non-axisymmetric material flow during deep drawing process has not yet been investigated.…”

Section: Proposed Multi Draw Radius (Mdr) Die and Its Principlementioning

confidence: 99%

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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: Proposed Multi Draw Radius (Mdr) Die and Its Principlementioning

confidence: 99%

“…The effects of fiber orientation on formability were also investigated [14]. In addition, the micro deep drawn parts are also focused on [16][17][18][19]. C. J. Wang.…”

Section: Introductionmentioning

confidence: 99%

Multi Draw Radius Die Design for Increases in Limiting Drawing Ratio

Phanitwong

Thipprakmas

2020

Metals

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“…Yet, the mentioned and modified models are not capable of clarifying size effects expansively. Based on the open and close lubricant pockets, friction coefficient increases by decrease of specimen size, due to the increase of open to close lubricant pockets fraction consequently, commonly used lubricants in macroscale are unable to improve tribological characteristics in microscale [12,13] and lubricants overflow considerably at the open lubricant pocket regions without expected effects on the process [14,15]. However, in macroscale, lubricants are extensively utilised to enhance the product quality, to decline forming force and increase tools life-cycle.…”

Section: Introductionmentioning

confidence: 99%

Effects of nano-particle lubrication on micro deep drawing of Mg-Li alloy

Kamali

Xie

Jia

et al. 2019

Int J Adv Manuf Technol

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Effects of various lubrication conditions on macroscale deep drawing have been investigated extensively while in microscale due to the open and closed lubrication pocket theory and friction coefficient escalation, proper lubricants concern becomes severe. Microforming is to produce lighter and more energy effective products accordingly, in this study, Magnesium-Lithium (Mg-Li) alloy is chosen to superior formed micro-cup due to its ultralight weight with outstanding ductility. Mg-Li is a new material in microscale consequently, to study the mechanical properties, heat treatment process is performed. The dry and oil lubrication conditions are chosen as benchmarks to investigate effects of TiO2 oil-based nano-additive lubricant. Finite Element (FE) modelling has been conducted and the simulated results are agreed well with the experimental results where the drawing force is significantly affected by the nano-particle. The formed cup quality regarding the surface roughness has been evaluated extensively by consideration of various parameters and the quality improvement is substantial.

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“…Based on the open and close lubricant pockets theory, friction coefficient increases by decreasing the specimen's size, due to the increase in the open to close lubricant pockets ratio. Consequently, conventional lubricants in macroscale are unable to improve tribological behaviours in microscale [9][10][11][12]. Gong et al [13] studied the effects of castor, polyethylene film and soybean oil lubricants in MDD process and found that the polyethylene film is capable of reducing the maximum drawing force, increasing drawability and surface quality.…”

Section: Introductionmentioning

confidence: 99%

Micromanufacturing Technology and its Practice

Jiang

Hasam

Kamali

et al. 2020

SSP

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In order to make micro composite drills (Fig. 1), cemented tungsten carbide (WC-10Co) and high strength (AISI 4340) steel were successfully bonded by hot compaction diffusion bonding at a low temperature. The effects of holding time, pressure and temperature on microstructure and mechanical properties of the sintered carbides and bonding strengths of the bimetallic composites were examined, and a transitional layer was found at the interface as a result of elemental inter-diffusion. The optimal bonding parameters were determined to achieve the maximum bonding strength of 226 MPa of the WC-10Co/AISI 4340 steel joints, which is helpful in producing micro composite drills. Microforming is introduced to produce lighter and more energy effective products. In this study, Magnesium-Lithium (Mg-Li) alloy, new material in microscale, was chosen to superior formed micro-cup due to its ultralight weight with outstanding ductility. The dry and oil lubrication conditions were chosen as benchmarks to investigate effects of a novel oil-based nanoparticle lubricant in micro deep drawing (MDD) process of Mg-Li alloy. Finite Element (FE) modelling was conducted and the simulation results of the drawing force were in a good agreement with the experimental results. The formed cup quality with consideration on the surface roughness has been extensively evaluated and the results illustrated the quality improvement was substantial.

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Microdeep drawing of C1100 microsquare cups using microforming technology

Cited by 9 publications

References 17 publications

Multi Draw Radius Die Design for Increases in Limiting Drawing Ratio

Multi Draw Radius Die Design for Increases in Limiting Drawing Ratio

Effects of nano-particle lubrication on micro deep drawing of Mg-Li alloy

Micromanufacturing Technology and its Practice

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