scholarly journals A Study Of The Die Roll Height Of SHP-1 And SCP-1 Materials In The Fine Blanking Process

2015 ◽  
Vol 60 (2) ◽  
pp. 1397-1402 ◽  
Author(s):  
C.K. Lee ◽  
Y.C. Kim
Keyword(s):  
Shear Rate ◽  
Steel Sheet ◽  
Ferrite Phase ◽  
Fine Blanking ◽  
Cold Rolled ◽  
Die Roll ◽  
Blanking Process

Abstract The height of the die roll, the distance of the V-ring, and the shear rate were varied with the aim of investigating the effects of the applied changes on the fine blanking line in a cold-rolled and a pickled steel sheet, referred to as SCP-1 and SHP-1, respectively. Both materials consisted primarily of a ferrite phase with small amounts of impurities including F, Mn, and Cr. The distance was found to be a very important factor in controlling the shear of the V-ring in the fine blanking process. When the position of the V-ring was set at distances of 1.5 mm and 2 mm, the die roll height increased with increasing shear speeds from 6.4 m/min to 10 and 16 m/min. Analysis of the influence of the shear rate revealed that low rates resulted in the lowest die roll heights since the flow of material was effectively inhibited.

scholarly journals Numerical simulation of blanking process

2018 ◽  
Vol 157 ◽  
pp. 02038
Author(s):  
Peter Pecháč ◽  
Milan Sága
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Steel Sheet ◽  
Plastic Material ◽  
Material Model ◽  
Rolled Steel ◽  
Finite Element Software ◽  
History Of ◽  
Cold Rolled ◽  
Blanking Process

This paper presents numerical simulation of blanking process for cold-rolled steel sheet metal. The problem was modeled using axial symmetry in commercial finite element software ADINA. Data obtained by experimental measurement were used to create multi-linear plastic material model for simulation. History of blanking force vs. tool displacement was obtained.

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.

439 NEM analysis for fine-blanking process of high-tensile strength steel sheet

2008 ◽  
Vol 2008.21 (0) ◽  
pp. 754-755
Author(s):  
Toru TANAKA ◽  
Shuuhei YOSHIMURA ◽  
Takaki OGAWA ◽  
Yuichi TADANO ◽  
Seiya HAGIHARA
Keyword(s):  
Tensile Strength ◽  
Steel Sheet ◽  
High Tensile Strength ◽  
Fine Blanking ◽  
Blanking Process

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.

scholarly journals Modelling and numerical simulation of steel sheet fine blanking process

2020 ◽  
Vol 50 ◽  
pp. 395-400
Author(s):  
Mohamed Sahli ◽  
Xavier Roizard ◽  
Guillaume Colas ◽  
Mohamed Assoul ◽  
Luc Carpentier ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Steel Sheet ◽  
Fine Blanking ◽  
Blanking Process
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