A mathematical model to predict thickness distribution and formability of incremental forming combined with stretch forming

2019 ◽  
Vol 55 ◽  
pp. 164-172 ◽  
Author(s):  
Hyunwoo Choi ◽  
Cheolsoo Lee
Keyword(s):  
Mathematical Model ◽  
Incremental Forming ◽  
Thickness Distribution ◽  
Stretch Forming

scholarly journals Simulation of incremental forming processes of a pyramidal ring made of two materials

2018 ◽  
Vol 19 (3) ◽  
pp. 313
Author(s):  
Masood Ghassabi ◽  
Milad Salimi ◽  
Mohammad Haghpanahi
Keyword(s):  
Feed Rate ◽  
Rotational Speed ◽  
Incremental Forming ◽  
Thickness Distribution ◽  
Single Point ◽  
Dimensional Accuracy ◽  
Cnc Machine ◽  
Forming Force ◽  
Forming Process ◽  
Dimensional Precision

Incremental forming is one of the most well-known forming processes for complex and asymmetric parts. This method uses a CNC machine, simple forming tool, and a die. This study focused on effects of some parameters such as the material, feed rate, pitch, rotational speed and movement strategy of tool on the dimensional precision, forming force, thickness distribution and fracture in the welding area. The results showed that single point incremental forming (SPIF) led to a better thickness distribution with lower tool force, whereas two-point incremental forming led to better dimensional accuracy. Rotational speed does not have any significant impact on the forming process while decreasing the feed rate partially reduced the forming force. According to the results, although dimensional precision in double point incremental forming is better than SPIF, when it comes to the thickness distribution, forming force, and economic issues, SPIF is in favor. The results also showed that by connecting two materials, different parameters for the two materials could be investigated simultaneously in one simulation process.

Large-scale sheet deformation process by electromagnetic incremental forming combined with stretch forming

2016 ◽  
Vol 237 ◽  
pp. 139-154 ◽  
Author(s):  
Xiaohui Cui ◽  
Jianhua Mo ◽  
Jianjun Li ◽  
Xiaoting Xiao ◽  
Bo Zhou ◽  
...  
Keyword(s):  
Deformation Process ◽  
Large Scale ◽  
Incremental Forming ◽  
Stretch Forming ◽  
Sheet Deformation

3D Loading Path-Generating Method for FEM Simulation of Incremental Sheet Metal Forming Process

2010 ◽  
Vol 97-101 ◽  
pp. 2810-2815 ◽  
Author(s):  
Yan Xu ◽  
Shuang Gao Li ◽  
Lin Gao
Keyword(s):  
Sheet Metal ◽  
Incremental Forming ◽  
Thickness Distribution ◽  
Fem Simulation ◽  
Loading Path ◽  
Forming Process ◽  
Forming Simulation ◽  
Generating Method ◽  
Incremental Sheet Metal Forming ◽  
3D Loading

Incremental forming of sheet metal is difficult to be simulated for its complicated 3D loading path. In this work, an acceptable approach to generate 3D loading path, called “virtual guiding model method” is accomplished. The method, which has the similar idea with the conventional copy mill, is based on FEM and the basic principle of kinematics. With the help of the method, multi-stage incremental forming of a drawing typed square cup was simulated in the FEM software-PAMSTAMP and experimented. Through measuring the thickness distribution the vertical edge of the cup, the most difference between them is less than 0.05mm, which is satisfied with engineering request, and the results shows that the 3D loading path generating method is one of the most effective way to realize the incremental forming simulation.

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.

A Study on the Digital Simulation for Sheet Metal CNC Incremental Forming Based on Z-Map

2011 ◽  
Vol 201-203 ◽  
pp. 99-102
Author(s):  
Hu Zhu ◽  
Zhi Jun Liu ◽  
Jaegwan Kang
Keyword(s):  
Sheet Metal ◽  
Incremental Forming ◽  
Thickness Distribution ◽  
Digital Simulation ◽  
Simulation Models ◽  
Vertical Movement ◽  
Parameters Optimization ◽  
Nc Code ◽  
Cnc Incremental Forming ◽  
Swept Volumes

A method of the digital simulation for the sheet metal CNC incremental forming was proposed based on the Z-map model. The tool extrusion movements were divided into two types according to the principle of sheet metal CNC incremental forming, i.e. vertical movement and horizontal movement. The vertical and horizontal swept volumes of the tool were built to intersect with the Z-map model of sheet metal respectively and the simulation models were generated. The thickness of deformed sheet metal was predicted and the thickness distribution chart was generated. The case studies show that the method can be applied to NC code verification, forming parameters optimization and formability prediction, moreover the system runs stably and reliably in the whole simulation process.

scholarly journals Cranial Reconstruction Using Double Side Incremental Forming

2015 ◽  
Vol 639 ◽  
pp. 535-542 ◽  
Author(s):  
Bin Lu ◽  
Dong Kai Xu ◽  
Run Zhe Liu ◽  
Heng An Ou ◽  
Hui Long ◽  
...  
Keyword(s):  
Tool Path ◽  
Incremental Forming ◽  
Thickness Distribution ◽  
Single Point ◽  
Pure Titanium ◽  
Sheet Forming ◽  
Incremental Sheet Forming ◽  
Geometric Accuracy ◽  
Backing Plate ◽  
Cranial Implant

Incremental sheet forming (ISF) is a highly versatile and flexible process for rapid manufacturing of complex sheet metal parts. Comparing to conventional sheet forming processes, ISF is of a clear advantage in manufacturing small batch or customized products such as cranial implant. Although effort on cranial reconstruction by using incremental sheet forming approach has been made in recent years, research has been mostly based on the single point incremental forming (SPIF) strategy and there are still considerable technical challenges for achieving better geometric accuracy, thickness distribution and complex cranial shape. In addition, the use of a backing plate or supporting die reduces the process flexibility and increases the cost. To overcome these limitations, double side incremental sheet forming (DSIF) process is employed for forming Grade 1 pure titanium sheet by using different toolpath strategies. The geometric accuracy and thickness distribution of the final part are evaluated so the optimized tool path strategies are developed. This leads to an assessment of the DSIF based approach for the application in cranial reconstruction.

scholarly journals TENDENCIES IN FORMING SHEET METAL PARTS USING INCREMENTAL FORMING ADVANCED TECHNOLOGIES

2019 ◽  
Vol 25 (3) ◽  
Author(s):  
CATALINA CIOFU ◽  
BOGDAN CHIRITA ◽  
ROXANA LUPU ◽  
COSMIN GRIGORAS ◽  
CRINA RADU ◽  
...  
Keyword(s):  
Sheet Metal ◽  
Incremental Forming ◽  
Stretch Forming ◽  
Micro Forming ◽  
Forming Process ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Advanced Technologies ◽  
Metal Materials ◽  
Forming Methods

Stretch forming of sheet metal materials is a highly required process in aerospace industry for manufacturing skin parts. Automation of some processes such as cutting, punching, forming, shearing and nesting in conventional manufacturing tends to combine these forming methods. Some researches are made on the formability of sheet metal materials obtained in incremental forming process with stretch forming and water jet incremental micro-forming with supporting dies. This paper is an attempt to review the newly researches made on optimization of manufacturing metal skin parts to achieve geometrical accuracy.

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