Effect of punch angle and punch radius on bend angle through air V-bending of sheet metal

2019 ◽  
Author(s):  
Muhammad Arsyad Suyuti ◽  
Muhammad Iswar ◽  
Rusdi Nur
Keyword(s):  
Sheet Metal ◽  
Bend Angle ◽  
Punch Radius

The Effect of Anisotropy on Spring-Back of CK67 Steel Sheet in L-Dies Bending Processes

2011 ◽  
Vol 291-294 ◽  
pp. 672-675
Author(s):  
Jafar Bazrafshan ◽  
A. Gorji ◽  
A. Taghizadeh Armaky
Keyword(s):  
Numerical Simulations ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Steel Sheet ◽  
Elastic Recovery ◽  
Sheet Thickness ◽  
Bend Angle ◽  
Spring Back ◽  
Geometric Changes

One of the most sensitive features of sheet metal forming processes is the elastic recovery during unloading, called spring-back, which leads to some geometric changes in the product. This phenomenon will affect bend angle and bend curvature, and can be influenced by various factors. In this research, the effects of sheet thickness and die radiuses an sheet anisotropy on spring-back in L-die bending of CK67 steel sheet were studied by experiments and numerical simulations.

scholarly journals Hydraulic Sheet Metal Bending System

2020 ◽  
pp. 251-257
Keyword(s):  
Sheet Metal ◽  
Space Constraint ◽  
Metal Plate ◽  
Spring Back ◽  
Constraint Factors ◽  
Bending Process ◽  
Punch Radius ◽  
Human Effort ◽  
Sheet Metal Bending ◽  
Manufacturing Methods

Due to increasing Globalization it is very much essential for manufacturers to produce goods having highest reliability and in required time. This is achieved by using various manufacturing methods. The transformers which are currently assembled for Welding Machines require hammering of the extruded Metal plate. This method requires large Human effort in form of Hammering. Hence the safety of the operator is also at a risk. The main purpose of this system is to automate the bending process so that almost negligible amount of Human Effort is required and the process becomes completely safe. This paper concentrates on the basic factors which should be considered while designing bending machine especially when sheet metal can’t be bent separately and having space constraint. Factors considered are force required, punch radius, reduction of spring back,

Study on Parameters for Affecting SCI of Sheet Metal Forming

2010 ◽  
Vol 44-47 ◽  
pp. 2862-2866
Author(s):  
Ji Tao Du
Keyword(s):  
Mechanical Property ◽  
Surface Quality ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Friction Condition ◽  
Experimental Results ◽  
Forming Defect ◽  
Punch Radius

The surface contact impression(SCI) is the neglected forming defect and seriously affects surface quality and mechanical property of stamping parts. The technology parameters and affective degree which alleviate or eliminate SCI are researched , four factors including die radius(DR) , die clearance(DC), punch radius(PR) and friction condition(FC) , which each factor chooses three levels are designed and constitute a L9（34）orthogonal table. The experimental results indicate that the significances order of technology parameters affecting SCI is DR> PR > DC >FC. The analyzed result shows that the superior parameter affecting SCI is DR ,the inferior is FC, adapted DC greatly removes SCI. the research puts forward a reference for improving surface quality of stamping parts.

A New Method of Producing Bend Angle by Applying Sheet Forging to V-Bending Process

2015 ◽  
Vol 651-653 ◽  
pp. 1066-1071 ◽  
Author(s):  
Takayuki Aso ◽  
Takashi Iizuka ◽  
Tomoyuki Ota
Keyword(s):  
Plastic Deformation ◽  
Sheet Metal ◽  
Final Stage ◽  
Empirical Method ◽  
New Method ◽  
Bend Angle ◽  
Bending Process ◽  
Punch Displacement ◽  
Bend Angles

In actual manufacturing, some empirical method such as the bottoming technique is generally used in order to adjust the bend angles of products. In this study, a new method for controlling the bend angle in the V-bending process was attempted by applying sheet metal forging. In the experiments, three punches with lumps at the punch tip were used. These lumps were pushed into a bent section at the final stage of bending and were able to stretch the inside plane of the bent section. In both cases examined (using punches with one or two lumps at the tip), the bend angle decreased with an increase in punch displacement. This result shows new possibilities for controlling the bend angle by introducing plastic deformation to the bent section.

Punch Radius Influence on “Large Size” Hydroformed Components

2012 ◽  
Vol 504-506 ◽  
pp. 937-942
Author(s):  
Gabriele Papadia ◽  
Antonio del Prete ◽  
Alessandro Spagnolo
Keyword(s):  
Sheet Metal ◽  
Process Parameters ◽  
Process Design ◽  
Numerical Study ◽  
Fluid Pressure ◽  
Large Size ◽  
Blank Sheet ◽  
Punch Radius ◽  
Hydroforming Process ◽  
Compressed Fluid

Sheet metal hydroforming has gained increasing interest during last years, especially as application in the manufacturing of some components for: automotive, aerospace and electrical appliances for niche productions. Different studies have been also done to determine the optimal forming parameters making an extensive use of FEA. In the hydroforming process a blank sheet metal is formed through the action of a fluid and a punch. It forces the sheet into a die, which contains a compressed fluid. Many studies have been focused on the analysis of process and geometric parameters influence about the hydroforming process of a single product with main dimensions till to 100 mm. In this paper the authors describe the results of an experimental activity developed on two different large sized products obtained through sheet metal hydroforming. Different geometric and process parameters have been taken into account during the testing phase to study, in particular, the punch radius influence on the process feasibility. An ANOVA analysis has been implemented to study the influence of geometrical and process parameters on the maximum hydroforming depth. Through this work it has been possible to verify that in the hydroforming process of large size products geometry and, in particular, punch radius, are some of the main factors that influences the feasibility of the products. Different considerations can be made about the effects of the blankholder force and the fluid pressure on the maximum hydroforming depth. As further developments, the authors would perform a numerical study in order to enlarge the knowledge of the process design space to other possible values of the punch radius.

The Study of Parameters on CK67 Steel Sheet Spring-Back in L-Dies Bending Processes

2011 ◽  
Vol 189-193 ◽  
pp. 2788-2791
Author(s):  
J. Bazrafshan ◽  
A. Gorji ◽  
A. Taghizadeh Armaky ◽  
J. Sadeghi
Keyword(s):  
Numerical Simulations ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Steel Sheet ◽  
Elastic Recovery ◽  
Sheet Thickness ◽  
Bend Angle ◽  
Spring Back ◽  
Geometric Changes

One of the most sensitive features of sheet metal forming processes is the elastic recovery during unloading, called spring-back, which leads to some geometric changes in the product. This phenomenon will affect bend angle and bend curvature, and can be influenced by various factors. In this research, the effects of sheet thickness and die radiuses on spring-back in L-die bending of CK67 and St 14 steel sheet were studied by experiments and numerical simulations.

Investigation of Spring-Back and Spring-Go of AISI 400 S Sheet Metal in "V" Bending Dies Depending on Bending Angle and Punch Radius

2014 ◽  
Vol 532 ◽  
pp. 549-553 ◽  
Author(s):  
Kamil Özdin ◽  
Emrah Büyük ◽  
Firuz Abdalov ◽  
Hüsamettin Bayram ◽  
Ahmet Çini
Keyword(s):  
Sheet Metal ◽  
Steel Sheet ◽  
Spring Back ◽  
Bending Angle ◽  
Punch Radius ◽  
Manufacturing Tolerances ◽  
Spreadsheet Software ◽  
Bending Angles

The components made of steel sheet metal very important in todays industry. In order to be useful, those parts must comply with the design tolerances, such as shape, position and dimensions. The largest problem with the parts bended by using dies is the springing, because it violates the manufacturing tolerances. Therefore, it is vital to know a parts springback and springgo properties in advance, which is mainly dependent on the properties of the sheet metal and bending conditions.In this study, 0.9 mm AISI 400 S steel sheet metal was bended using V dies (30°, 45°and 60°) and punches (2 mm, 4 mm and 6 mm). After being removed from the bending dies,springback rates of the specimens were measured by using optical goniometer. With respect to the bending angles and punch radii, springback and springgo properties of the specimens were recorded by using a spreadsheet software and some figures are obtained.

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