A Comprehensive Study of the Hydroforming Process of Metallic Bellows: Investigation and Multi-objective Optimization of the Process Parameters

Safari, Mehdi; Joudaki, Jalal; Ghadiri, Younes

doi:10.5829/ije.2019.32.11b.19

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Laser forming technology received attention from Safari et al in the works [8] and [9], the former as a state-of-art review in the field. The hydroforming process for the manufacture of complex shapes, such as metallic bellows, was performed by Safari et al [10]. A low-pressure die cast of aluminum automotive wheels was modelled and validated by Ou et al [11], while Jardin et al [12] employed additive manufacturing and 42CrMo4 steel in a very disruptive investigation.…”

Section: Contributionsmentioning

confidence: 99%

Numerical and Experimental Advances in Innovative Manufacturing Processes

Sousa

Safari

2021

Metals

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Section: Contributionsmentioning

confidence: 99%

Numerical and Experimental Advances in Innovative Manufacturing Processes

Sousa

Safari

2021

Metals

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“…Therefore, it is necessary to make several assumptions to facilitate the subsequent force analysis [17][18][19]:…”

Section: Force Analysis Of the Seed-filling Stage Of The Smdmentioning

confidence: 99%

Design and Experimental Study of a Combined Pneumatic Plot Seed-metering Device for Cotton

Yudao

Xuezhen

2020

IJE

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This study presents a combined pneumatic seed-metering device (SMD) that could not only fill, carry, and meter seeds, but also switch quickly between seed-metering and seed-cleaning modes, and clean seeds thoroughly and rapidly. The seed-filling, seed-carrying, and seed-metering modes of the SMD were analyzed based on a theoretical kinematic model. Furthermore, a three-factor, three-level orthogonal test was conducted by using a performance test bench arranged for the SMD as well as Design-Expert software. The combination of parameters that led to the lowest mis-seeding rate (0.59%) was as follows: an air pressure of 2.67 kPa, a slot width of 2.83 mm, and a seed-metering speed of 20 r/min. The optimized scheme that resulted in a relatively low multiple-seeding rate (4.3%) and met other requirements at the same time was as follows: an air pressure of 2.35 kPa, a slot width of 2.78 mm, and a seed-metering speed of 20 r/min. A field test was subsequently performed by using a combined pneumatic plot cotton planter prototype. While the mis-seeding and re-seeding rates obtained from the field test were both somewhat higher than those obtained from the laboratory bench test, they still met precision planting requirements. The field test validated the accuracy of the theoretical analysis and bench test and served as a foundation for future prototype production and popularization.

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“…Response Surface Methodology (RSM) and the Taguchi method are two of the approaches for the design of experiments (8)(9)(10). Khoshaim et al (11) investigated the laser cutting of PMMA sheets by a continuous CO2 laser.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Laser Cutting of Thin Polymethyl Methacrylate Sheets by Response Surface Methodology

Safari,

Joudaki,

Rezaei

2024

IJE

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Laser cutting is a precise, powerful, and low-cost tool for cutting different sheets of metals and polymers. The literature survey shows that the quality of cutting (surface roughness and kerf geometry) is a sophisticated parameter and conventional approaches cannot describe the quality of cutting for thin sheets of polymers very well. Statistical tools can help to interpret the effect of process variables. In this article, the laser cutting of Polymethyl methacrylate (PMMA) is experimentally investigated. The effect of process variables of laser cutting including the scanning speed, laser power, and laser beam diameter on the kerf width and surface roughness by Response Surface Methodology design investigated. The results revealed that increasing the laser power leads to increasing the surface roughness and decreasing the taper angle, while the kerf width at the top and bottom surface of the sheet decreases at first, then increases (for higher laser power than 90W). Also, increasing the scanning speed causes increasing surface roughness while the taper angle and the kerf width at the top and bottom surface increase at first, then it decrease. By increasing the laser beam diameter, the surface roughness will increase while the taper angle and the kerf width at the top and bottom surface decrease at first and then increase. The sophisticated effect of the main process variables and their interactions determines that finding the optimum condition of process parameters is hard and multi-objective optimization approaches are needed to find local minimum surface roughness and kerf geometry.

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A Comprehensive Study of the Hydroforming Process of Metallic Bellows: Investigation and Multi-objective Optimization of the Process Parameters

Cited by 5 publications

References 15 publications

Numerical and Experimental Advances in Innovative Manufacturing Processes

Numerical and Experimental Advances in Innovative Manufacturing Processes

Design and Experimental Study of a Combined Pneumatic Plot Seed-metering Device for Cotton

Investigation of Laser Cutting of Thin Polymethyl Methacrylate Sheets by Response Surface Methodology

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