Research on the selective multi-stage two point incremental forming based on the forming angle

2021 ◽  
Author(s):  
Hu Zhu ◽  
Luteng Liu ◽  
Yibo Liu ◽  
Jaeguan Kang
Keyword(s):  
Incremental Forming ◽  
Multi Stage ◽  
Forming Angle

Stress Analysis of Sheet Metal Vibration Incremental Forming

2010 ◽  
Vol 154-155 ◽  
pp. 166-170
Author(s):  
Gai Pin Cai ◽  
Ning Yuan Zhu ◽  
Na Wen
Keyword(s):  
Sheet Metal ◽  
Incremental Forming ◽  
Low Frequency ◽  
Forming Process ◽  
Technical Parameters ◽  
Vibration Technique ◽  
Low Frequency Vibration ◽  
Metal Deformation ◽  
Angle Effect ◽  
Forming Angle

As a non-homogenous force stresses during incremental forming, sheet metal easily tended to instability, and some defects, such as deposition, wrinkle and fracture, would appear. If the vibration technique was combined the incremental forming process, its deformation mechanism would be different from that of the old process, and sheet metal deformation quality was also risen. Then some mechanical equations were built by force analyzed on element in local contact zone of die head forcing down. According to reasonable hypothesis and simplified, the equations were solved. Some stress-time curves of the element were obtained by given process parameters, vibrational parameters and time parameters. It is shown from analysis that stress variety of the element is closely related to amplitude, frequency and forming angle, effect of sheet metal vibration incremental forming with high frequency vibration is more superior than that of with low frequency vibration; only when vibrational parameters are reasonably matching technical parameters, the effective vibration incremental forming can be obtained.

A Research of the Precision of Titanium Sheet Formed by Hot Incremental Sheet Forming Method

2017 ◽  
Vol 749 ◽  
pp. 154-160
Author(s):  
Khanh Dien Le ◽  
Tan Hung Nguyen ◽  
Ngoc Huy Tran ◽  
Thanh Son Le ◽  
Huy Bich Nguyen ◽  
...  
Keyword(s):  
Empirical Process ◽  
Incremental Forming ◽  
New Technology ◽  
Single Point ◽  
Metal Sheet ◽  
Forming Process ◽  
Titanium Sheet ◽  
Metal Sheets ◽  
Experimental Process ◽  
Forming Angle

Single Point Incremental Forming (SPIF) is a recent technology of forming sheet in several decades. Nowadays, SPIF technology is still continued to be studied, applied and ameliorated in sheet manufacturing in industry. However one of the difficulties of the technology is the forming angle is still small (smaller than 800 according the properties of metal sheets). This paper recommends a measure of increasing the plasticity of the sheet by heating in time of forming by SPIF technology. Naturally, the plasticity of metal sheet increases by the temperature of the material in forming process with its limitation and constraint. The paper represents the effect of heating metal sheet through the empirical process of SPIF technology directed by the design of experiment (DOE). The analyses of the results of experimental process is applied to show the effect of heating to the precision of Titanium sheet. Finally, some private opinions about the heating in SPIF are also mentioned as a very tiny contribution of the research for the new technology.

scholarly journals Study on Thickness Thinning Ratio of the Forming Parts in Single Point Incremental Forming Process

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Mingshun Yang ◽  
Zimeng Yao ◽  
Yan Li ◽  
Pengyang Li ◽  
Fengkui Cui ◽  
...  
Keyword(s):  
Deformation Zone ◽  
Incremental Forming ◽  
Single Point ◽  
Sheet Thickness ◽  
Single Point Incremental Forming ◽  
Forming Process ◽  
Feeding Speed ◽  
Forming Angle ◽  
Tool Diameter ◽  
Thinning Rate

An excessive thickness-reducing ratio of the deformation zone in single point incremental forming of the metal sheet process has an important influence on the forming limit. Prediction of the deformation zone thickness is an important approach to control the thinning ratio. Taking the 1060 aluminum as the research object, the principle of thickness deformation in the single point incremental forming process was analyzed; the finite element model was established using ABAQUS. A formula with high accuracy to predict the deformation zone thickness was fitted with the simulation results, and the influences of process parameters, such as tool diameter, step down, feeding speed, sheet thickness, and forming angle, on thinning ratio were analyzed. The accuracy of the finite element simulation was verified by experiment. A method to control the thinning rate by changing the forming trajectory was proposed. The results showed that the obtained value by using the fitted formula is closer to the experimental results than that obtained by the sine theorem. The thinning rate of the deformation zone increases with the increase of tool diameter, forming angle, and sheet thickness and decreases with the increase of step down, while the feeding speed had no significant effect on the thinning ratio. The most important factor of the thinning ratio is the forming angle, and the thinning ratio can be effectively reduced by using the forming trajectory with a uniformly distributed pressing point.

Finite Element Simulations Of Multi Stage Incremental Forming Process

2018 ◽  
Vol 5 (2) ◽  
pp. 3802-3810 ◽  
Author(s):  
Kurra Suresh ◽  
Srinivasa Prakash Regalla ◽  
Nitin Kotkundae
Keyword(s):  
Finite Element ◽  
Incremental Forming ◽  
Finite Element Simulations ◽  
Forming Process ◽  
Multi Stage

Thickness Distribution and Forming Strategy Analysis for Two Point Incremental Forming with a Male Die

2011 ◽  
Vol 337 ◽  
pp. 452-455 ◽  
Author(s):  
Zhao Bing Liu ◽  
Paul Meehan ◽  
Paul Bellette
Keyword(s):  
Incremental Forming ◽  
Low Cost ◽  
Thickness Distribution ◽  
Single Point ◽  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Strategy Analysis ◽  
Multi Stage ◽  
Analytical Perspective ◽  
Forming Strategy

Incremental Sheet Forming (ISF) is a promising sheet-metal-forming technology which is drawing more and more researchers’ attention due to its flexibility of manufacturing three-dimensional products at a relatively low cost for rapid prototyping and small-batch production. This paper is focused on the thickness distribution and the forming strategy analysis for two point incremental forming with a male die. The analyzed benchmark is half a torus which is generated by revolving a semi-circle. Such a part is hardly able to be formed by single point incremental forming because its slope varies from 0 degree to 90 degrees. In terms of the varying slope, the variant of sine’s law is derived to give an approximate prediction of the thickness distribution from an analytical perspective. In addition, a multi-stage forming strategy is proposed in order to form the part successfully. In particular, a keying operation is implemented carefully in order to avoid twist phenomenon and achieve good dimensional accuracy.

Manufacture of Accurate Titanium Cranio-Facial Implants with High Forming Angle Using Single Point Incremental Forming

2013 ◽  
Vol 549 ◽  
pp. 223-230 ◽  
Author(s):  
Joost R. Duflou ◽  
Amar Kumar Behera ◽  
Hans Vanhove ◽  
Liciane S. Bertol
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Design Feature ◽  
Feature Analysis ◽  
Medical Applications ◽  
Single Point Incremental Forming ◽  
Wall Angle ◽  
Titanium Grade ◽  
Intermediate Part ◽  
Forming Angle

One of the key application areas of Single Point Incremental Forming is in the manufacture of parts for bio-medical applications. This paper discusses the challenges associated with the manufacture of cranio-facial implants with extreme forming angles using medical grade titanium sheets. While on one hand, the failure wall angle is an issue of concern, the parts also need to be manufactured with accuracy at the edges where the implants fit into the human body. Systematic steps taken to overcome these challenges, using intelligent intermediate part design, feature analysis and compensation, are discussed. A number of case studies illustrating the manufacture of accurate parts in aluminium, stainless steel and titanium grade-2 alloy are discussed.

Sign in / Sign up

Export Citation Format

Share Document