A Measure of Optimization of Technological Parameters to Improve the Formability of Aluminum Sheet a 1050 H14 by SPIF Technology

The objective of this paper is to select a set of technological forming parameters including vertical feed Δz, feeding rate of Vxy of the tool (a kind of pestle but no-cutting edges), the diameter of tool D and the revolutions per minute of tool n to achieve the highest forming ability of aluminum sheet A1050 H14 (according to JIS G3101Japanese standard) when forming metal sheet by Single Point Incremental Forming Technology-SPIF. The content of the article consists of 3 processes: Pre-design of experiment (Pre-DOE) to select of a set of reasonable limited parameters when forming aluminum sheet A1050 H14 models when forming on the existent specialized SPIF machine in the National Key Laboratory of Digital Control and System Engineering laboratory (DCSELAB); Performing aluminum sheet A1050 H14 models on the Pre-DOE to obtain the forming angle values; Evaluating the experimental results by analysis of variance; Setting up the regression equation of the angle of deformability with influence parameters; Optimization the regression equation to select an optimal set of forming parameters to gain the highest deformability of aluminum sheet A1050 H14.

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A Measure of Optimization of Technological Parameters to Improve the Formability of Stainless Steel Sheet SUS 304 by SPIF Technology

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.863.59 ◽

2020 ◽

Vol 863 ◽

pp. 59-66

Author(s):

Tuyen Vo ◽

Thanh Nam Nguyen ◽

Phan Anh Nguyen ◽

Khanh Dien Le ◽

Tan Ken Nguyen ◽

...

Keyword(s):

Stainless Steel ◽

Steel Sheet ◽

Single Point ◽

Regression Equation ◽

Parameters Optimization ◽

Stainless Steel Sheet ◽

Technological Parameters ◽

Forming Technology ◽

Forming Parameters ◽

Forming Angle

The objective of this paper is to select a set of technological forming parameters including vertical feed Δz, feeding rate of Vxy of the tool (a kind of pestle but no-cutting edges), the diameter of tool D and the revolutions per minute of tool n to achieve the highest forming ability of stainless steel sheet SUS304 (according to JIS Japanese standard) when forming metal sheet by Single Point Incremental Forming Technology-SPIF. The content of the article consists of 3 processes: Pre-design of experiment (Pre-DOE) to select of a set of reasonable limited parameters when forming SUS304 stainless steel models when forming on the existent specialist SPIF machine in the National Key Laboratory of Digital Control and System Engineering laboratory (DCSELAB); Performing SUS304 models on the Pre-DOE to obtain the forming angle values; Evaluating the experimental results by Analyzing of the variance; Setting up the regression equation of the angle of deformability with influence parameters Optimization the regression equation to select an optimal set of forming parameters to gain the highest deformability of stainless steel sheet SUS304.

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Recommendation of a Measure for Enhancing the Precision of Dimensions of Foil Products in Single Point Incremental Forming Technology

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.656-657.479 ◽

2015 ◽

Vol 656-657 ◽

pp. 479-483 ◽

Cited By ~ 1

Author(s):

Khanh Dien Le ◽

Tan Hung Nguyen ◽

Thien Binh Nguyen ◽

Thanh Son Le ◽

Huy Bich Nguyen ◽

...

Keyword(s):

Feed Rate ◽

Incremental Forming ◽

Single Point ◽

Single Point Incremental Forming ◽

Forming Technology ◽

Sheet Materials ◽

Forming Parameters ◽

Plastic Materials ◽

Almost All

Single Point Incremental Forming (SPIF) has become a popular technology of forming sheet materials in the recent decades. However, the springback phenomenon, an inborn property of almost all elasto-plastic materials, reduces the precision of dimensions of the products by the finished forming session. This paper attempts to find out a measure to minimize this unwanted obstacle by using both empirical and simulating methods in order to define the relations of springback values among the forming parameters such as diameter of the forming tool, its revolution per minute, its velocity and its feed rate. Analyzing these equations to extract the appropriate parameters of forming for enhancing the precision of SPIF products is the final aim of this paper.

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Influences of Vibration Parameters on Formability of 1060 Aluminum Sheet Processed by Ultrasonic Vibration-Assisted Single Point Incremental Forming

Advances in Materials Science and Engineering ◽

10.1155/2019/8405438 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12

Author(s):

Mingshun Yang ◽

Lang Bai ◽

Yan Li ◽

Qilong Yuan

Keyword(s):

Ultrasonic Vibration ◽

Incremental Forming ◽

Single Point ◽

Aluminum Sheet ◽

Forming Limit ◽

Single Point Incremental Forming ◽

Experimental Platform ◽

Formed Part ◽

Vibration Parameters ◽

Forming Angle

With increasing design complexities of thin-walled parts, the requirement of enhanced formability has impeded the development of the single point incremental forming (SPIF) process. In the present research, the ultrasonic vibration-assisted single point incremental forming (UV-SPIF) method was introduced to increase the formability of sheet metals. AL1060 aluminum alloy was adopted as the experimental material, and a truncated cone part was considered as the research object. The simulation model of UV-SPIF was established to analyze the distribution of plastic strains in the formed part. A forming angle was selected as the measuring index of formability of the aluminum sheet, and the influences of different vibration parameters on formability were evaluated. An experimental platform was devised to verify the accuracy of the obtained simulation results. It was found that ultrasonic vibration effectively improved the forming limit of the sheet. When the amplitude was 6 µm and the frequency was 25 kHz, the sheet yielded the best formability with the largest forming angle of 67 degrees.

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RESEARCH ON THE FORMING ANGLE OF A1050-H14 ALUMINUM MATERIAL PROCESSED BY USING SINGLE POINT INCREMENTAL FORMING TECHNOLOGY (SPIF)

Science and Technology Development Journal ◽

10.32508/stdj.v12i16.2357 ◽

2009 ◽

Vol 12 (16) ◽

pp. 72-79

Author(s):

Nam Thanh Nguyen ◽

Tuan Dinh Phan ◽

Cuong Van Vo ◽

Dien Khanh Le ◽

Binh Thien Nguyen ◽

...

Keyword(s):

Incremental Forming ◽

Single Point ◽

Metal Sheet ◽

Single Point Incremental Forming ◽

Regression Equations ◽

Cnc Milling ◽

Cnc Milling Machine ◽

Forming Technology ◽

Forming Angle ◽

Tool Diameter

Single Point Incremental Forming - SPIF is the recent manufacturing process of metal sheet forming by drafting a non-cutting edge sphere-tip tool on a clamped metal sheet. The formability of metal sheet in SPIF is considered by the forming angle (ψ)- the maximum draft angle so that the material is not torn. The experimental research on A1050-H14 aluminum sheet on Bridge Port VMC500-16 CNC milling machine in C1 workshop of the HCMUT in order to find out the regression equations to predict the maximum forming angle in the relation with four most important technology parameters in SPIF: size of the step down z, forming feed vxy, spindle speed n, forming tool diameter d.

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Combining Response Surface Method and Metaheuristic Algorithms for Optimizing SPIF Process

International Journal of Manufacturing Materials and Mechanical Engineering ◽

10.4018/ijmmme.2021100101 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1-25

Author(s):

Amr Ahmed Shaaban ◽

Omar Mahmoud Shehata

Keyword(s):

Response Surface ◽

Response Surface Method ◽

Single Point ◽

Experimental Studies ◽

Optimization Techniques ◽

Parameters Optimization ◽

Second Phase ◽

Fe Model ◽

Optimum Conditions ◽

Surface Method

Recently, studies have focused on optimization as a method to reach the finest conditions for metal forming processes. This study tests various optimization techniques to determine the optimum conditions for single point incremental forming (SPIF). SPIF is a die-less forming process that depends on moving a tool along a path designed for a specific feature. As it involves various parameters, optimization based on experimental studies would be costly, hence a finite element model (FE-model) for the SPIF process is developed and validated through experimental results. In the second phase, statistical analyses based on the response surface method (RSM) are conducted. The optimum conditions are determined using the desirability optimization method, in addition to two metaheuristic optimization algorithms, namely genetic algorithm (GA) and particle swarm optimization (PSO). The results of all optimization techniques are compared to each other and a confirmation test using the FE-model is subsequently performed.

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A recommendation of computation of normal streeses in single point incremental forming technology

Science and Technology Development Journal ◽

10.32508/stdj.v17i1.1279 ◽

2014 ◽

Vol 17 (1) ◽

pp. 21-28

Author(s):

Dien Khanh Le ◽

Nam Thanh Nguyen ◽

Binh Thien Nguyen

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Incremental Forming ◽

Single Point ◽

Finite Element Method Simulation ◽

Recent Decade ◽

Work Piece ◽

Single Point Incremental Forming ◽

Forming Technology ◽

Element Method

Single Point Incremental Forming (SPIF) has become popular for metal sheet forming technology in industry in many advanced countries. In the recent decade, there were lots of related studies that have concentrated on this new technology by Finite Element Method as well as by empirical practice. There have had very rare studies by pure analytical theory and almost all these researches were based on the formula of ISEKI. However, we consider that this formula does not reflect yet the mechanics of destruction of the sheet work piece as well as the behavior of the sheet in reality. The main aim of this paper is to examine ISEKI’s formula and to suggest a new analytical computation of three elements of stresses at any random point on the sheet work piece. The suggested formula is carefully verified by the results of Finite Element Method simulation.

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Principle and Simulation Study on Multi Point-Single Point Incremental Combined Forming for Sheet Metal

Materials Science Forum ◽

10.4028/www.scientific.net/msf.626-627.273 ◽

2009 ◽

Vol 626-627 ◽

pp. 273-278 ◽

Cited By ~ 1

Author(s):

X.J. Li ◽

Ming Zhe Li ◽

C.G. Liu ◽

Zhong Yr Cai

Keyword(s):

Sheet Metal ◽

Single Point ◽

Experimental Result ◽

Work Piece ◽

The Novel ◽

Forming Process ◽

Explicit Finite Element ◽

Forming Defect ◽

Forming Technology ◽

Elastic Cushion

Based on Multi-Point (MP) forming technology and Single-Point Incremental (SPI) forming technology, MP-SPI combined forming method for sheet metal is proposed, the principle and two different forming techniques are illustrated firstly. Then the paper is focused on numerical analysis for the novel forming technique with explicit Finite Element (FE) algorithm. During simulation of spherical work-piece, dimpling occurs as a main forming defect in MP-SPI combined forming process. Simulation results show that the dimpling defect can be suppressed effectively by using elastic cushion. An appropriate thickness of elastic cushion is necessary to prevent dimpling. And also the deformation of the work-piece is sensitive to the shape of elastic cushion. The combined forming test shows that the numerical simulation result is closed to the experimental result.

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On the thinning variations in hydrostatic forming of sheet metal

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.15.1.2021.17.0617 ◽

2021 ◽

Vol 15 (1) ◽

pp. 7824-7836

Author(s):

Thu Thi Nguyen ◽

N.D. Trung

Keyword(s):

Sheet Metal ◽

Thickness Distribution ◽

Input Parameter ◽

Relative Depth ◽

Technological Parameters ◽

Forming Technology ◽

Input Parameters ◽

Forming Characteristics ◽

Cylindrical Cup ◽

Forming Methods

In sheet metal forming, thinning phenomenon is one of the most concerned topics to ameliorate the final quality of the manufactured parts. The thinning variations depend on many input parameters, such as technological parameters, geometric shape of die, workpiece’s materials, and forming methods. Hydrostatic forming technology is particularly suitable for forming thin-shell products with complex shapes. However, due to the forming characteristics, the thinning variations in this technology are much more intense than in other forming methods. Therefore, in this paper, an empirical study is developed to determine the thinning variations in hydrostatic forming for cylindrical cup. Measurement of thickness at various locations of deformed products are conducted to investigate the thickness distribution and determine the dependence of the largest thinning ratio on the input parameters (including the blank holder pressure, the relative depth of the die and the relative thickness of the workpiece). The results are expressed in charts and equation which allow determining the effect of each input parameter on the largest thinning ratio.

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Development of Magnetic Field-Assisted Single-Point Incremental Forming

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.883.189 ◽

2021 ◽

Vol 883 ◽

pp. 189-194

Author(s):

Marco Gucciardi ◽

Derrick Benson ◽

Livan Fratini ◽

Gianluca Buffa ◽

Hitomi Yamaguchi

Keyword(s):

Magnetic Field ◽

Magnetic Force ◽

Incremental Forming ◽

Single Point ◽

Vertical Direction ◽

Aluminum Sheet ◽

Single Point Incremental Forming ◽

Vertical Load ◽

Localized Deformation ◽

Physical Interference

Single Point Incremental Forming (SPIF) has recently introduced the concept of material formability enhancement through localized deformation. Since material is processed by means of a pin tool attached to spindle, physical interference (especially in vertical direction) limits attainable shapes with the conventional process. The aim of the following work is to increase the variety of achievable geometries with SPIF through in-process magnetic field assistance. An innovative configuration managing SPIF tool movement using magnetic force is proposed. With this in mind, a magnet configuration was designed to generate a vertical load able to plastically deform a 0.5 mm thick AA1100 aluminum sheet. Experiments were carried out to prove the concept by manufacturing a truncated cone; the results demonstrated the feasibility of Magnetic Field-Assisted SPIF.

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