Effects of Using Flexible Die Instead of Flexible Punch in Rubber Pad Forming Process

2017 ◽  
pp. 259-267 ◽  
Author(s):  
L. Belhassen ◽  
L. Ben Said ◽  
S. Koubaa ◽  
M. Wali
Keyword(s):  
Forming Process ◽  
Rubber Pad Forming ◽  
Flexible Die

scholarly journals Flexible Die Design and Springback Compensation Based on Modified Displacement Adjustment Method

2014 ◽  
Vol 6 ◽  
pp. 131253 ◽  
Author(s):  
Young-Ho Seo ◽  
Ji-Woo Park ◽  
Woo-Jin Song ◽  
Beom-Soo Kang ◽  
Jeong Kim
Keyword(s):  
Closed Loop ◽  
Three Dimensional ◽  
Loop System ◽  
Die Design ◽  
Manufacturing Cost ◽  
Closed Loop System ◽  
Forming Process ◽  
Element Analysis ◽  
Springback Compensation ◽  
Flexible Die

Springback in metal forming process often results in undesirable shape changes in formed parts and leads to deterioration in product quality. Even though springback can be predicted and compensated for through the theories or methodologies established thus far, an increase in manufacturing cost accompanied by a change in die shape is inevitable. In the present paper, it is suggested that the cost accompanied with springback compensation can be minimized while allowing the processing of various three-dimensional curved surfaces by using a flexible die composed of multiple punches. With the die being very flexible, the iterative trial-and-error method can be readily applied to compensate for the springback. Thus, repeated designing and redesigning of solid or matched dies can be avoided, effectively saving considerable time. Only some adjustments of punch height are required. Detailed designs of the flexible die as well as two core algorithms to control the respective punch heights are described in this paper. In addition, a closed-loop system for the springback compensation using the flexible die is proposed. The amount of springback was simulated by a finite element analysis and the modified displacement adjustment (DA) method as the springback compensation model was used in the closed-loop system. This system was applied to a two-dimensional quadratic shape problem, and its robustness was verified by an experiment.

Simulation and experiment researches on rubber pad forming of two-step channels by different dies

2021 ◽  
pp. 095440622110342
Author(s):  
Teng Fei ◽  
Wang Hongyu ◽  
Wang Guodong ◽  
Jiang Lei ◽  
Sun Juncai ◽  
...  
Keyword(s):  
Sheet Metal ◽  
Design Strategy ◽  
Forming Process ◽  
Processing Technologies ◽  
Physical Experiments ◽  
Micro Channels ◽  
Rubber Pad Forming ◽  
Simulation And Experiment

Rubber pad forming is one of advance processing technologies. With both rubber pad and die, the sheet metal is stamped into the required shapes. The shapes of the die directly affect the final shapes of the channels on the sheet. With the developments of micro-channels, a new kind of two-step channels is concerned gradually in many fields. Since there are waved structures in these channels, many beneficial functions are caused. However, the manufacturing of this new kind channels by rubber pad forming are still not meticulously researched. This article is focused on the rubber pad forming process of different two-step channels. Different two-step channels are designed and made. Based on both FEM and physical experiments, the forming processes of these new channels are researched. The forming results are discussed and compared with each other, the best design strategy is also proposed through results.

Thickness analysis of complex two-step micro-groove on plate during rubber pad forming process

2020 ◽  
pp. 095440622093392
Author(s):  
Fei Teng ◽  
Hongyu Wang ◽  
Juncai Sun ◽  
Xiangwei Kong ◽  
Jie Sun ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Thickness Variation ◽  
Forming Process ◽  
Rubber Pad Forming ◽  
Groove Structure ◽  
Thickness Variations ◽  
Accuracy Of Results ◽  
Plane Slab ◽  
Element Method

The surface groove structure has numerous functions based on their shapes. In order to make these functions developed, both new shapes and processing forms of the surface structures are being innovated. In this paper, not only the advanced rubber pad forming process is used, but also a new kind of micro-groove with two-step structures is designed. A model based on multi-plane slab method is proposed to analyze the process. According to the stress acting condition, a half of two-step micro-groove structure is divided into seven areas in the width direction. The thickness variation of plate in each area is obtained. When the shape, depth, width, and height ratio of the first and second-step micro-groove are different, the thickness variations of the plate are analyzed. In order to verify the accuracy of the model, both finite element method and pressing experiment are done. Based on the results provided by both finite element method and experiment, the accuracy of results calculated by analytical model is verified.

Computer aided modelling of friction in rubber-pad forming process

2009 ◽  
Vol 209 (10) ◽  
pp. 4925-4934 ◽  
Author(s):  
Maziar Ramezani ◽  
Zaidi Mohd Ripin ◽  
Roslan Ahmad
Keyword(s):  
Forming Process ◽  
Computer Aided ◽  
Rubber Pad Forming

scholarly journals Shape and Position Design of Two-Step Micro-Channel on Plate During Rubber Pad Forming Process Based on Simulation

2020 ◽  
Author(s):  
Fei Teng ◽  
Hongyu Wang ◽  
Guodong Wang ◽  
Lei Jiang ◽  
Jirui Li ◽  
...  
Keyword(s):  
Geometric Parameters ◽  
Second Step ◽  
Micro Channel ◽  
Metal Mold ◽  
Height Ratio ◽  
Forming Process ◽  
Element Simulation ◽  
Micro Channels ◽  
Rubber Pad Forming ◽  
Length Width

Abstract Rubber pad forming is an advanced processing technology. The micro-channel is formed on the plate by both rubber pad and the metal mold. With the development of micro-channel, a two-step micro-channel has been applied in more and more fields. However, little attention was given to the geometric design and forming process of this unique channel. In this paper, the process of forming multi-row two-step micro-channels on plate by rubber pad forming is studied. At the same time, the length, width, height ratio and the edge chamfer of two-step micro-channel are discussed as the main parameters of geometry. The number and distance of the second-step structures are also studied in this paper. The influence of these geometric parameters on the forming results is analyzed in the finite element simulation. The plates are designed according to these geometric parameters and structures. Moreover, a novel shape and position design of two-step micro-channel are provided. In addition, forming experiments are also carried out for further study. Finally, a design strategy is provided by forming results in conclusions.

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