scholarly journals Fundamentals and Processes of Fluid Pressure Forming Technology for Complex Thin-Walled Components

Engineering ◽  
2020 ◽  
Author(s):  
Shijian Yuan
Keyword(s):  
Fluid Pressure ◽  
Forming Technology ◽  
Thin Walled

Laser Direct Forming Technology of Double Thin-Walled Parts with Connecting Ribs

2017 ◽  
Vol 44 (2) ◽  
pp. 0202005
Author(s):  
方琴琴 Fang Qinqin ◽  
傅戈雁 Fu Geyan ◽  
王 聪 Wang Cong ◽  
陆 斌 Lu Bin ◽  
周 斌 Zhou Bin
Keyword(s):  
Forming Technology ◽  
Thin Walled

Researches on Control and Application of Wrinkles in the Thin-Walled Metal Plastic Forming Process

2013 ◽  
Vol 446-447 ◽  
pp. 1193-1196
Author(s):  
Zhu Lin Hu ◽  
Lian Fa Yang ◽  
Yu Lin He
Keyword(s):  
Metal Forming ◽  
Thin Metal ◽  
Forming Process ◽  
Forming Technology ◽  
Plastic Forming ◽  
The Common ◽  
Thin Walled

The thin metal plastic forming is an indispensable metal forming technology. Wrinkling is one of the common defects in plastic forming. If this kind of defects can be used properly, the formability of metal will be better. In this paper, the recent researches on the methods of identifying wrinkles, distinction of the useful wrinkles and harmful wrinkles, control and application of the wrinkles are summarized. The useful wrinkles are expected to improve the forming property.

Experimental modeling of fluid pressure in hydrostatic forming for cylindrical product

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040158
Author(s):  
Nguyen Thi Thu ◽  
Nguyen Dac Trung
Keyword(s):  
Fluid Pressure ◽  
Regression Function ◽  
Die Design ◽  
Design Calculation ◽  
Forming Process ◽  
Blank Holder ◽  
Forming Technology ◽  
Input Parameters ◽  
Function Relationship ◽  
And Control

Forming fluid pressure is an important technological parameter that determines whether a product can be accurately formed according to the size and profile of the die in hydrostatic forming technology. The expected value of this parameter is often very high because it acts as the punch in forming complex products from sheet metal. However, it is difficult to achieve high values because the forming fluid pressure depends on the ability to hold high pressure of equipment system and input parameters including the blank holder pressure, the depth of die, the thickness of workpiece. Moreover, it is also necessary to have a mathematical model for this parameter to facilitate the calculation and control of the forming process. In order to solve the above problems, this paper will indicate a simple way to avoid the pressure drop during forming process, and establish a regression function relationship between the forming fluid pressure for typical cylindrical product and input parameters above by experimental research method. The results contribute to die design, calculation and control of process parameters to facilitate shaping thin shell products in actual hydrostatic forming technology.

Exploring Liquid Impact Forming Technology of the Thin-Walled Tubes

2014 ◽  
Vol 633-634 ◽  
pp. 841-844 ◽  
Author(s):  
Cheng Ming Huang ◽  
Jian Wei Liu ◽  
Yin Zhong Zhong ◽  
Min Jian Wu ◽  
Kai Ming Wang ◽  
...  
Keyword(s):  
Rectangular Cross Section ◽  
Tube Hydroforming ◽  
304 Stainless Steel ◽  
Steel Tubes ◽  
Forming Technology ◽  
Liquid Impact ◽  
Thin Walled Tube ◽  
Forming Efficiency ◽  
Thin Walled ◽  
Forming Methods

In order to realize the objective of lightweight manufacturing, the forming methods of thin-walled tubes are studied in this paper. Liquid impact forming, a compound forming technique of thin-walled tube using stamping and hydroforming processes, is presented in order to reduce the forming difficulty and increase the forming efficiency. A simple experimental tooling, including stamping device and tube hydroforming apparatus is developed. Forming experiments of stamping and liquid impact forming processes in rectangular cross-section dies are performed for 304 stainless steel tubes. The results of experiments show that the liquid impact forming technology is feasible, and it will be widely applied in the future.

scholarly journals Experimental Modeling of Pressure in the Hydrostatic Formation of a Cylindrical Cup with Different Materials

2021 ◽  
Vol 11 (13) ◽  
pp. 5814
Author(s):  
Trung-Kien Le ◽  
Thi-Thu Nguyen ◽  
Ngoc-Tam Bui
Keyword(s):  
Fluid Pressure ◽  
Regression Method ◽  
Mathematical Equation ◽  
Forming Process ◽  
Forming Technology ◽  
Input Parameters ◽  
Sheet Products ◽  
Cylindrical Cup ◽  
The Relationship

Forming complex sheet products using hydrostatic forming technology is currently a focus of the majority of forming processes. However, in order to increase stability during the forming process, it is necessary to identify and analyze the dependency of the forming pressure and the quality of a product on input parameters. For the purpose of modeling the forming pressure, this paper presents empirical research on the product of a cylindrical cup made of various materials, including carbon steel (DC04), copper (CDA260), and stainless steel (SUS 304) with different thicknesses (0.8 mm, 1.0 mm, and 1.2 mm), under a defined range of binder pressures. The regression method is selected to formulate an equation that shows the relationship between the input parameters, including the materials (ultimate strength and yield stress), workpiece thickness, binder pressure and the output parameter, and the formation of fluid pressure. The mathematical equation allows us to determine the extent of the effect of each input on the forming pressure. The experimental results can be used for the easier planning and forecasting of the process and product quality in hydrostatic forming.

Laser Cladding Forming Technology of Flat-Top Thin-Walled Part Based on Special-Shaped Base Surface

2019 ◽  
Vol 46 (11) ◽  
pp. 1102002
Author(s):  
李东升 Li Dongsheng ◽  
石拓 Shi Tuo ◽  
石世宏 Shi Shihong ◽  
蒋伟伟 Jiang Weiwei ◽  
李刚 Li Gang ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Base Surface ◽  
Forming Technology ◽  
Thin Walled

Control of interstitial fluid pressure: Role of [beta ]-integrins

2001 ◽  
Vol 21 (3) ◽  
pp. 222-230 ◽  
Author(s):  
Rolf K. Reed ◽  
Ansgar Berg ◽  
Eli-Anne B. Gjerde ◽  
Kristofer Rubin
Keyword(s):  
Interstitial Fluid ◽  
Fluid Pressure ◽  
Interstitial Fluid Pressure

Upscaling of foam forming technology for pilot scale

TAPPI Journal ◽  
2019 ◽  
Vol 18 (8) ◽  
Author(s):  
JANI LEHMONEN ◽  
TIMO RANTANEN ◽  
KARITA KINNUNEN-RAUDASKOSKI
Keyword(s):  
Production Efficiency ◽  
Strength Loss ◽  
Pilot Scale ◽  
Foam Density ◽  
Forming Process ◽  
Production Scale ◽  
Forming Technology ◽  
Wet Pressing ◽  
Foam Forming ◽  
Board Industry

The need for production cost savings and changes in the global paper and board industry during recent years have been constants. Changes in the global paper and board industry during past years have increased the need for more cost-efficient processes and production technologies. It is known that in paper and board production, foam typically leads to problems in the process rather than improvements in production efficiency. Foam forming technology, where foam is used as a carrier phase and a flowing medium, exploits the properties of dispersive foam. In this study, the possibility of applying foam forming technology to paper applications was investigated using a pilot scale paper forming environment modified for foam forming from conventional water forming. According to the results, the shape of jet-to-wire ratios was the same in both forming methods, but in the case of foam forming, the achieved scale of jet-to-wire ratio and MD/CD-ratio were wider and not behaving sensitively to shear changes in the forming section as a water forming process would. This kind of behavior would be beneficial when upscaling foam technology to the production scale. The dryness results after the forming section indicated the improvement in dewatering, especially when foam density was at the lowest level (i.e., air content was at the highest level). In addition, the dryness results after the pressing section indicated a faster increase in the dryness level as a function of foam density, with all density levels compared to the corresponding water formed sheets. According to the study, the bonding level of water- and foam-laid structures were at the same level when the highest wet pressing value was applied. The results of the study show that the strength loss often associated with foam forming can be compensated for successfully through wet pressing.

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