An experimental investigation of deep drawing and drawing processes of thin - walled products with utilization of ultrasonic vibrations

Pasierb, A.; Wojnar, A.

doi:10.1016/0924-0136(92)90145-i

Cited by 23 publications

(8 citation statements)

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“…For instance, Kim and Loh showed that 2-dimensional vibration assisted cutting can decrease the cutting force and improve the machining quality [13]. Also, in metal forming process such as the rolling, extrusion and drawing processes, ultrasonic vibration can decrease the frictional force [15][16][17]. Mousavi et al investigated the effect of ultrasonic vibration applied on the die during the extrusion process and found that it was effective in reducing the extrusion force [16].…”

Section: Introductionmentioning

confidence: 97%

Effects of vibration frequency and amplitude on friction reduction and wear characteristics of silicon

Yoo

Kim

2016

Tribology International

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Section: Introductionmentioning

confidence: 97%

Effects of vibration frequency and amplitude on friction reduction and wear characteristics of silicon

Yoo

Kim

2016

Tribology International

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“…Ultrasound refers to sound waves with a vibration frequency above 20 kHz. Introducing ultrasonic vibration into the traditional metal-plastic forming process has the following advantages: Reducing the friction between the workpiece and the mold, improving the plastic forming ability of the metal material, and obtaining better surface quality and high-dimensional accuracy of the product [14][15][16]. Therefore, local and foreign scholars have carried out extensive research and have applied ultrasonic vibration technology to the processes of drawing, punching, extrusion, and rolling.…”

Section: Introductionmentioning

confidence: 99%

Shear Punching of Amorphous Alloys under High-Frequency Vibrations

Yan

Sun

et al. 2019

Metals

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Although amorphous alloys possess many excellent properties, their practical application is limited due to the difficulty of plastic forming. In this work, an effective shear punching of amorphous alloys under high-frequency vibrations was proposed. Under the high-frequency vibration of the punch, the plastic powder was melted into a flexible punch due to the frictional heat generation effect and the viscoelastic heat effect and continued to flow downward under the extrusion of the ultrasonic head to plastically deform the amorphous alloy ribbon. The disordered structure of the amorphous alloys helps them get soft in a localized region during high-frequency vibrations, which can result in low-stress deformations that are different from amorphous alloys in the conventional state. We manufactured various shapes with area of 5 mm2 using high-frequency vibrations and a molten plastic viscous medium. The molds were shaped into the letters “B”, “M”, and “G” and the Chinese characters “工” and “大”. The shapes were made from Fe-based, Al-based, La-based, and Cu-based amorphous alloys. Our results show that shear punching of amorphous alloys under high-frequency vibrations is an effective and low-cost production method of amorphous alloy, which also provides a basis for the wide application of amorphous alloy.

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“…It has been reported that the friction force is reduced and the lubrication condition is improved with the PBHF, and these enhance the formability [7,9,12,20]. Pasierb and Wojnar investigated the effect of ultrasonic vibration (16 kHz) through deep-drawing experiments with different materials [7], where the ultrasonic vibration was applied to the die. It was reported that the punch force was reduced and the change of thickness of side wall was slightly improved.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation and optimization of pulsating and variable blank holder force for identification of formability window for deep drawing of cylindrical cup

Kitayama

Natsume

Yamazaki

et al. 2015

Int J Adv Manuf Technol

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When a difficult-to-draw material is used, it is important to clarify a formability window representing the relationship between the blank holder force (BHF) and the punch stroke. In many cases, variable blank holder force (VBHF) that the BHF varies through the punch stroke is useful for the successful sheet metal forming to the difficult-to-draw materials. Another approach is to use pulsating blank holder force (PBHF). Therefore, the use of both the PBHF and the VBHF is useful for identifying the formability window of difficult-to-draw materials. In this paper, the formability window of a difficult-to-draw material is clarified with the PBHF and the VBHF. A design optimization problem is constructed to identify the formability window, in which the punch stroke is maximized subject to wrinkling and tearing. Several parameters in the VBHF and PBHF are included, and these are taken as the design variables. Numerical simulation in sheet metal forming is so numerically intensive that response surface approach is used. In particular, a sequential approximate optimization (SAO) using a radial basis function (RBF) network is used to determine the optimal parameter of PBHF and VBHF. In the numerical simulation, deep drawing of a cylindrical cup based on NUMISHEET 2011(BM1) is used. The approach using the PBHF and VBHF for identifying the formability window is examined through the numerical simulation coupled with the SAO using the RBF network. It is found from the numerical result that the proposed approach is useful for clarifying the formability window of a difficult-to-draw material. In addition, the optimal PBHF can reduce the maximum punch load that affects the tool life.

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An experimental investigation of deep drawing and drawing processes of thin - walled products with utilization of ultrasonic vibrations

Cited by 23 publications

References 1 publication

Effects of vibration frequency and amplitude on friction reduction and wear characteristics of silicon

Effects of vibration frequency and amplitude on friction reduction and wear characteristics of silicon

Shear Punching of Amorphous Alloys under High-Frequency Vibrations

Numerical investigation and optimization of pulsating and variable blank holder force for identification of formability window for deep drawing of cylindrical cup

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