Investigation of Combined Flat Coining and Fine Blanking of 16MnCr5 to Influence the Die Roll Formation

2021 ◽  
pp. 112-121
Author(s):  
F. Schweinshaupt ◽  
I. F. Weiser ◽  
T. Herrig ◽  
T. Bergs
Keyword(s):  
Fine Blanking ◽  
Die Roll

The effects of tool geometry change on shearing edge finish in fine-blanking of different materials

2003 ◽  
Vol 217 (8) ◽  
pp. 1057-1062 ◽  
Author(s):  
Y C Leung ◽  
L C Chan ◽  
C H Cheng ◽  
T C Lee
Keyword(s):  
Tool Geometry ◽  
Nose Radius ◽  
Fine Blanking ◽  
Burr Height ◽  
Service Period ◽  
Edge Surface ◽  
Edge Quality ◽  
Processing Material ◽  
Die Roll ◽  
Blanking Process

An excellent quality of shearing edge implies that a smooth cutting edge without tearing will be observed on the whole edge surface. This is one of the most significant features of the fine-blanking process. To achieve this good blanking edge quality in fine-blanking, quite a large number of factors need to be considered simultaneously during the operation, such as blanking speed, processing material, product shape, lubrication and tool geometry. Thus, the objective of this paper is mainly to study the influence of tool geometry change in fine-blanking for different materials. This is because the nose radius usually seriously deteriorates with increasing service period in mass production, which eventually causes the entire loss of the specific features of the fine-blanking process. Therefore, a tailor-made experimental study was carried out to investigate the relationship between the punch nose radius and the shearing edge quality, such as the shearing edge surface finish, burr height and die-roll height, during fine-blanking for different types of materials. Consequently, findings show that an increase in the punch nose radius produces a higher percentage of fracture of the blanked edge and increases the amount of burr height.

A Study on the Effect of V-Ring Position on the Die Roll Height in Fine Blanking for Special Automobile Seat Recliner Gear

2011 ◽  
Vol 383-390 ◽  
pp. 7122-7127 ◽  
Author(s):  
Jong Deok Kim ◽  
Heung Kyu Kim ◽  
Young Moo Heo ◽  
Sung Ho Chang
Keyword(s):  
Fine Blanking ◽  
Guide Plate ◽  
Die Roll ◽  
Ring Position

In this paper, the relation between die roll height and V-ring position was studied by fine blanking experiments for imaginary special automobile seat recliner gear. The three die inserts and three guide plate inserts with different V-ring positions were machined, and fine blanking tool was manufactured. Using the fine blanking tool, three experiments were conducted on the 650 ton fine blanking press. Each die roll height was measured, analyzed and we found the tendency of die roll heights on imaginary special gear to increase with increasing the distance between V-ring position and contour of gear. This result can be used to minimize the die roll height of fine blanking gear parts when designing V-ring of fine blanking tool.

Improvement of Die-Roll Quality in Compound Fine-Blanking Forming Process

2011 ◽  
Vol 337 ◽  
pp. 236-241 ◽  
Author(s):  
Xin Hua Huang ◽  
Hua Xiang ◽  
Xin Cun Zhuang ◽  
Zhen Zhao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Flow ◽  
The Finite Element Method ◽  
Forming Process ◽  
Fine Blanking ◽  
Die Roll ◽  
The Relationship ◽  
Element Method

Nowadays, the compound fine-blanking forming process is one of the most important processes to produce complicate multifunctional parts without subsequent machining. However, the big die-roll occurs in the sharp area is a common problem in this process. In this paper, the method with negative punch-die clearance was proposed to solve this problem by comparing three feasible plans. In addition, the influence on the process with different value of the negative punch-die clearance was studied by the finite element method (FEM). The results of this study verified that the process with suitable value of the negative punch-die clearance can result in significant decrease of the die-roll size. The relationship between the material flow near the region of die-roll and the punch-die clearance was also clarified.

scholarly journals Prediction of die-roll in fine blanking by use of profile parameters

2017 ◽  
Vol 207 ◽  
pp. 1564-1569 ◽  
Author(s):  
Kenji Fuchiwaki ◽  
Yuji Mure ◽  
Kazunari Yoshida ◽  
Masao Murakawa
Keyword(s):  
Fine Blanking ◽  
Die Roll

An Experimental Study on the Die Roll Height According to the V-Ring Distance of the Fine Blanking Tool for the Seat Recliner Holder with Various Corner Shapes

2012 ◽  
Vol 626 ◽  
pp. 109-113
Author(s):  
Jong Deok Kim ◽  
Young Moo Heo ◽  
Heung Kyu Kim
Keyword(s):  
Experimental Study ◽  
Fine Blanking ◽  
Guide Plate ◽  
Corner Radius ◽  
Die Roll

In this paper, the relation between die roll height and V-ring distance of a fine blanking tool was studied by experimenting on a special designed seat recliner holder with various corner shapes. Three guide plate inserts with different V-ring distances and a die insert with constant die chamfer were machined, and a fine blanking tool was manufactured for the experiments. Three experiments were conducted on a 650-ton fine blanking press. Each die roll height on the sample from the experiments was measured and analyzed. It should be noticed that the die roll heights on the corner shapes of fine blanked parts increase with increasing the distance between the V-ring distance, and decrease with increasing corner radius and angle. These results can be used to minimize the die roll height of fine blanking parts with corner shapes when designing the V-ring of a fine blanking tool.

Application of Fine Blanking to the Manufacture of a Sprocket with Stainless Steel Sheet

2004 ◽  
Vol 261-263 ◽  
pp. 1665-1670 ◽  
Author(s):  
Y.H. Seo ◽  
Byoung Kee Kim ◽  
H.D. Son
Keyword(s):  
Stainless Steel ◽  
Unit Cost ◽  
Damage Model ◽  
Hardness Test ◽  
Simple Method ◽  
Fine Blanking ◽  
3 Dimensional ◽  
Deform 2D ◽  
Die Roll ◽  
Blanking Process

Wire cutting(EDM) or blanking is used to made workpieces from sheet metal. Wire EDM provides a relatively simple method for making holes of any desired cross section in material. But EDM requires a lot of working time and the high unit cost of production. In conventional blanking, for the production of precision devices or assemblies, it is always necessary that at least two, but generally more, secondary operations are required per piece part. Using the fine blanking process, a precise finished part with inner and outer forms clearly sheared over the whole material thickness are produced in one single operation. In this study an attempt is made to manufacture a sprocket with fine blanking process. The sprocket is parts for the tape feeder of surface mount system in electronic parts. First, a change of the existing design is made in a sprocket. The materials selected are three kinds of stainless steel, SUS304, SUS316 and SUS430. And the mechanical properties are investigated through the tensile test. After fine blanking, hardness and precision are examined with hardness test and 3-dimensional coordinate measuring for samples. The results of investigations of fine-blanking process with the help of FEM code, DEFORM 2D, are presented. For the simulation, SUS304 and SUS316 are used as materials. The damage model of Cockroft and Latham is used to calculate damage. Die-roll height, die-roll width, burnish zone and fracture zone from the fine blanking simulation are investigated in comparison with them of samples. And the applied force at each part of fine-blanking die is estimated with load-stroke diagram.

scholarly journals Experimental Investigation of Process Forces and Part Quality for Fine Blanking of Stainless Steel with Inductive Heating

2021 ◽  
Author(s):  
Ingo Felix Weiser ◽  
Robby Mannens ◽  
Andreas Feuerhack ◽  
Thomas Bergs
Keyword(s):  
Stainless Steel ◽  
High Strength Steels ◽  
High Strength ◽  
Martensite Phase ◽  
Inductive Heating ◽  
Fine Blanking ◽  
Quality Properties ◽  
Process Forces ◽  
Die Roll ◽  
Blanking Process

Fine blanking is a highly productive process of industrial mass production with which high quality components in particular but not exclusively for the automotive industry are produced. The manufacturing process faces its limits at elevated tensile strengths of the materials to be processed. Consequently, high-strength steels can currently only be fine blanked to a limited extent. This can be overcome by lowering the flow stress of high-strength steels by means of inductive heating. A steel of high importance especially for industries with high hygiene standards such as medical and nutrition production is the stainless steel X5CrNi18-10 (1.4301). As a metastable austenitic steel which can initiate cutting impact on the press through martensitization, fine blanking of stainless steel is a challenge. X5CrNi18-10 is not a high-strength steel per se but becomes difficult to process due to the high hardness of the martensite phase, known as transformation-induced plasticity (TRIP) effect. Thus, in order to combine the possible advantages of the fine blanking process with inductive heating and the important properties of stainless steel, fine blanking of this steel was investigated with inductive heating prior to the fine blanking. The process forces and product quality properties such as die roll were investigated and found to be advantageous in comparison to non-heated fine blanking specimens of the same steel. The process forces and the die roll height decreased due to the heating.

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