scholarly journals Physical Modeling of Cross Wedge Rolling Limitations

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 867 ◽  
Author(s):  
Łukasz Wójcik ◽  
Zbigniew Pater ◽  
Tomasz Bulzak ◽  
Janusz Tomczak
Keyword(s):  
Physical Modeling ◽  
Laboratory Testing ◽  
Physical Modelling ◽  
Rolling Process ◽  
Model Material ◽  
Model Tests ◽  
Cross Wedge Rolling ◽  
Comparison Of The Results ◽  
Cracking Process ◽  
Grade Steel

This article presents the results of model tests aiming to verify the possibility of applying commercial plasticine as a model material for modelling the limits to the cross-wedge rolling process. This study presents a comparison of the results of laboratory testing and physical modelling of cross-wedge rolling (CWR) processes. Commercial plasticine was the model material used in the research to model 50HS grade steel formed in 1150 °C. The model material was cooled to 0 °C, 5 °C, 10 °C, 12,5 °C, and 15 °C. Physical modelling of neckings and slippages is only possible when the plasticine is heated to 12.5 °C prior to forming. Commercial plasticine does not enable one to model the cracking process inside the rolled element.

scholarly journals A Comparative Analysis of the Physical Modelling of Two Methods of Balls Separation

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7126
Author(s):  
Łukasz Wójcik ◽  
Zbigniew Pater ◽  
Tomasz Bulzak ◽  
Janusz Tomczak ◽  
Konrad Lis
Keyword(s):  
Comparative Analysis ◽  
Physical Modelling ◽  
Rolling Process ◽  
Model Material ◽  
Physical Analysis ◽  
Real Process ◽  
Radial Forces ◽  
3D Printed ◽  
Torque Values ◽  
Skew Rolling

The article presents the results of model tests with which a comparative analysis of two methods of ball separation during the skew rolling process was carried out. A verification of the results obtained in the physical modelling process with the results obtained in the real process of skew ball rolling was also carried out. During the physical modelling, the effect of changing the ball separation method on the quality of the products obtained, variations in maximum torque values and maximum radial forces were analyzed. In the case of real tests, the results were verified with the results of physical modelling, in which the surface quality and torque values for one of the tool sets were compared. Physical modelling was used to verify the differences between the two methods of ball separation. Commercial plasticine based on synthetic wax from the manufacturer PRIMO was used as a model material for physical analysis. The plasticine used for testing was cooled to 0 °C and the cooling process took 24 h. The tools used for the physical modelling were 3D printed and the material used was ABS. The method of physical modelling using plasticine as a model material allows for a correct analysis of hot metal forming processes.

Investigation of Simulation Parameters for Cross Wedge Rolling Titanium and Bainitic Grade Steel

2015 ◽  
Vol 736 ◽  
pp. 165-170 ◽  
Author(s):  
Thoms Blohm ◽  
Malte Stonis ◽  
B.A. Behrens
Keyword(s):  
Process Parameters ◽  
Rolling Process ◽  
Cross Wedge Rolling ◽  
Suitable Parameter ◽  
Simulation Parameters ◽  
Parameter Values ◽  
Grade Steel

In this paper the comparison of simulations of cross wedge rolling processes with real trials using flat cross wedge tools is presented. The investigated materials are titanium and bainitic grade steel. First simulations were used to find the suitable parameter combinations for the investigated materials. Afterwards tools were manufactured with these parameters and additionally with some variations to investigate a field of parameters around this range of parameter values. The purpose of these tests is to find geometrical and process parameters with which a stable cross wedge rolling process for bainitic grade steel and titanium is possible.

FEM Simulation Analysis of Cross Wedge Rolling Process

2011 ◽  
Vol 381 ◽  
pp. 72-75
Author(s):  
Bin Li
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Rolling Process ◽  
Stress Distributions ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Pressure Distributions ◽  
Metal Forming Process ◽  
Rolling Load

This paper investigates the interfacial slip between the forming tool and workpiece in a relatively new metal forming process, cross-wedge rolling. Based on the finite elements method, three-dimensional mechanical model of cross wedge rolling process has been developed. Examples of numerical simulation for strain, stress distributions and rolling load components have been included. The main advantages of the finite element method are: the capability of obtaining detailed solutions of the mechanics in a deforming body, namely, stresses, shapes, strains or contact pressure distributions; and the computer codes, can be used for a large variety of problems by simply changing the input data.

scholarly journals Physical Modelling of the Ball-Rolling Processes

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 35 ◽  
Author(s):  
Zbigniew Pater ◽  
Janusz Tomczak ◽  
Łukasz Wójcik ◽  
Tomasz Bulzak
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
Physical Modelling ◽  
Model Material ◽  
Helical Rolling ◽  
Rolling Mills ◽  
Cross Rolling ◽  
Plastic Forming ◽  
3D Printed ◽  
Manufacturing Accuracy ◽  
Steel Balls

The objective of the article was to present the state of the problem of physical modelling of the hot-working processes with plasticine as the model material. It was stated that the aforementioned method can prove helpful in analyzing complex plastic forming processes such as cross rolling and helical rolling of balls. In order to confirm this hypothesis, an attempt at forming steel balls with diameters of 40 mm (cross rolling) and 57 mm (helical rolling) under laboratory conditions was made. Further on, these processes were conducted in model form using special model rolling mills and 3D printed acrylonitrile butadiene styrene (ABS) tools. The comparison of the test results regarding shape and manufacturing accuracy, as well as force parameters, confirmed the validity of using physical modelling in the investigation of the process of cross rolling and helical rolling of balls.

Mathematical and Physical Modeling of the Rolling Process of Tapered Shafts for Aviation Purposes

2016 ◽  
pp. 009-016 ◽  
Author(s):  
R.Yu. Sukhorukov ◽  
◽  
A.A. Sidorov ◽  
A.I. Alimov ◽  
M.I. Nagimov ◽  
...  
Keyword(s):  
Physical Modeling ◽  
Rolling Process ◽  
Mathematical And Physical Modeling
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