Investigation of advanced laser-MAG tandem hybrid welding for joining gap-flawed thin sheet metal parts

An optimum process for a two-step press forging of stepped holes in a metal sheet was proposed .Numerical simulation on the two-step process was carried out by using DEFORM-3D. Distributions of effective strain and effective stress were obtained. The study showed that the process not only can form the stepped, but also can increase the surface quality and strength of stepped holes in sheet metal parts, According to the numerical simulation’s process parameter , an experimental die was designed, the simulation results were in good agreement with the experimental data

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Development of Inline Micro-Deburring Applying Magnetic-Field-Assisted Polishing

International Journal of Automation Technology ◽

10.20965/ijat.2010.p0009 ◽

2010 ◽

Vol 4 (1) ◽

pp. 9-14 ◽

Cited By ~ 4

Author(s):

Masahiro Anzai ◽

◽

Takeo Nakagawa ◽

Nobuhiro Yoshioka ◽

Shigeki Banno ◽

...

Keyword(s):

Magnetic Field ◽

Sheet Metal ◽

Thin Sheet ◽

Practical Application ◽

Metal Parts ◽

Actual Production ◽

Thin Sheet Metal ◽

Actual Operation ◽

Machine Parts ◽

Magnetic Abrasives

The ongoing miniaturization and increasing precision of machine parts have made minute burrs generated in shearing, cutting, and grinding, a serious problem and their elimination a vital necessity. With no currently efficient way of deburring metal parts made by press-forming thin sheet metal. We applied a polishing using magnetic abrasives to micro-deburring, and used this in actual production. Results showed that three-dimensionally formed thin sheet hoops can be deburred, and clarified that nonstop operator-free deburring lines can be put into actual operation at production sites. We also attempted deburring the outer blade of an electric shaver as a practical application, attaining excellent results.

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Optimization of Superplastic Forming Processes for High Volume Production in Aeronautics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.549.189 ◽

2013 ◽

Vol 549 ◽

pp. 189-196

Author(s):

Andreas Nick ◽

Joachim Zettler ◽

Gerhard Hirt

Keyword(s):

Sheet Metal ◽

Thin Sheet ◽

Superplastic Forming ◽

High Volume ◽

Strain Rates ◽

Form Complex ◽

Metal Parts ◽

Sheet Metal Parts ◽

High Volume Production ◽

Volume Production

Superplastic forming (SPF) is a well-known and widely used sheet metal forming process especially useful for the production of very complex and light thin sheet metal components. The superplastic behavior of a material is highly dependent on the temperature and occurs only at a narrow range of strain rates with an optimum value that is unique for each material. Within the aeronautic industry, this process is mainly used to form complex sheet metal parts made of the titanium alloy Ti6Al4V in heat affected areas and areas where corrosion resistance plays an important role. Even though the process times of SPF are often in the range of hours and therefore recurring costs are very high, the process is sometimes still the only choice when it comes to the forming of Ti6Al4V sheet metal parts for aeronautic or aerospace applications. To overcome the problem of long process times and high costs, in recent years, a lot of research did happen with the goal of temperature reduction during forming or forming at higher strain rates. Especially the change in the aeronautic industry towards high volume production is increasing the competition between suitable forming technologies and the SPF technology can only persist if both goals, reduction of process time and recurring costs are reachable. In this paper we will address those goals and show highly useful numerical procedures to make the SPF process ready for the next generation of aerospace manufacturing.

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Grain Size Effect on Saddle Phenomenon in V-Bending Process of Thin Sheet Metal

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.773.202 ◽

2018 ◽

Vol 773 ◽

pp. 202-207

Author(s):

Chang Cheng Chen ◽

Yi Xiang Hong

Keyword(s):

Grain Size ◽

Size Effect ◽

Sheet Metal ◽

Design Method ◽

Tensile Force ◽

Thin Sheet ◽

Grain Size Effect ◽

Sheet Metal Parts ◽

Grain Sizes ◽

Thin Sheet Metal

The ability for predicting the springback on sheet metal bending processes is identified as an important feature of the ability for predicting the final geometry of sheet metal parts. The grain size effect makes the difficult on application of traditional design method in processing. As through tool and processing design, to understand the effects of grain size effects is an important and powerful way to effectively compensate for and eliminate the springback. In this paper, 99.5% pure iron specimens were annealed at different temperature to obtain the specified grain sizes. The effects of different grain sizes on the saddle after V-bending of the thin sheet metal were investigated. The results show that at the same thickness of specimens, the grain size has no significant effect on the saddle height. However, with increasing the thickness of the specimens the saddle will also be more prominent protruding height. The concave side of bent specimen is against the compression force and its grains structure tend to a round shape, whereas the convex side is against the tensile force and its grains structure tend to a flaky shape.

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