Development of Calibration Knives for Hot Cutting Shears

2021 ◽  
Vol 410 ◽  
pp. 380-385
Author(s):  
Artem A. Malanov ◽  
Grigory A. Orlov
Keyword(s):  
Software Package ◽  
Element Model ◽  
Simulation Software ◽  
Cutting Process ◽  
Piercing Mill ◽  
Part Geometry ◽  
Cylindrical Workpiece ◽  
Simulation Results ◽  
3D Computer Simulation ◽  
Deform 3D

In this paper, the problem distortion the end of a cylindrical workpiece in the cutting process on hot shears before being fed to the piercing mill is considered. To solve this problem, a new calibration of knives has been developed, and a finite element model hot cutting shears has been developed using the DEFORM-3D computer simulation software package. Modeling the cutting process using the proposed calibration has been carried out. It was found that the knife calibers geometry plays an important role in the formation end part geometry of the blank. Based on the simulation results, it was concluded that proposed calibration reduces the ovality workpiece end by almost 2 times in comparison with current calibration. Recommendations have been developed for the production of changes in the existing technology for cutting pipe billets.

scholarly journals Numerical Study on the Explosive Separation of Pyrotechnic Cutter

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Shihui Xiong ◽  
Yaokun Ye ◽  
Yanhua Li ◽  
Yuquan Wen
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Cutting Speed ◽  
Simulation Software ◽  
Cutting Process ◽  
Connecting Rod ◽  
Optimal Distance ◽  
Maximal Speed ◽  
Cutting Effect ◽  
Simulation Results

Pyrotechnic cutters are widely used in the wrapping-band connecting structures of carrier rockets. In this article, a three-dimensional (3D) finite element model of a pyrotechnic cutter is proposed to determine the influence of the explosive dynamic fracture process and the cutter blade acceleration distance on the cutting effect, using AUTODYN finite element simulation software. Numerical simulations of the cutting process reveal that the initial shear speed, the maximal speed, and the speed at which the cutter connects the rod increase linearly with increasing distance between the cutter blade and the cutting board. As the distance increases, the difference between the initial cutting speed and the maximal speed of the cutter gradually decreases and effectively disappears for a distance of 8.5 mm. At this time, the acceleration effect of the gunpowder gas on the cutter is nearly maximal. When the distance between the cutter and the connecting rod is less than 7.5 mm, the cutting time decreases significantly with increasing spacing. For distances between 7.5 mm and 8.5 mm, the distance has little effect on the cutting time as it increases. There is a small increase in the cutting time, and it can be seen that there is an optimal distance between the cutter and the cutting board during the cutting process. The cutting effect is the strongest for this distance. For the cutter studied in this article, the optimal distance was 7.5 mm. In addition, numerical studies were also performed by varying the maximal cutting diameter of the connecting rod of the pyrotechnic cutter. The discrepancy between the simulation results and actual test data was under 10%, and the simulation result for the cut state of the connecting rod was also consistent with the test result. The simulation results in this article can deepen the understanding of the action mechanism and process of the pyrotechnic cutter and reveal the maximal cutting diameter of the connecting rod of the pyrotechnic cutter under different charging conditions. This provides a reference for future cutter design optimization.

Analysis of Square Billet Cross Wedge Rolling Process Using Finite Element Method

2012 ◽  
Vol 271-272 ◽  
pp. 406-411 ◽  
Author(s):  
Wen Yu Ma ◽  
Bao Yu Wang ◽  
Jing Zhou ◽  
Qiao Yun Li
Keyword(s):  
Finite Element ◽  
Rolling Force ◽  
Element Model ◽  
Rolling Process ◽  
Simulation Software ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Radial Forces ◽  
Forming Angle ◽  
Deform 3D

The aim of this paper is to determine whether the train axle cross wedge rolling(CWR) using square billet as blank is available or not. Based on numerical simulation software DEFORM-3D, we built the finite element model. And the whole forming process was simulated successfully. The stress and strain distributions of workpiece in the process were analyzed. The effect of forming angle, stretching angle and billet size on rolling force was investigated, then determined the proper process parameters. The differences between the round billet rolling and the square billet rolling were obtained by comparing the tangential, axial and radial forces during the rolling process. The studied results show the availability of using square billet as blank in train axle CWR and provide important realistic meaning and application value.

scholarly journals Computer Simulation and Analysis of the Parameters of the Drawing Process of Thin Wire from the Alloy Pd-5Ni

2019 ◽  
Vol 805 ◽  
pp. 13-18
Author(s):  
Sergey Sidelnikov ◽  
Kristina Bindareva ◽  
Ekaterina Lopatina ◽  
Viktor Leonov ◽  
Denis Voroshilov ◽  
...  
Keyword(s):  
Software Package ◽  
Stable Process ◽  
Experimental Studies ◽  
Metal Alloys ◽  
Drawing Process ◽  
Thin Wire ◽  
Simulation Results ◽  
Increase In Productivity ◽  
3D Software ◽  
Deform 3D

This article represents the results of studies of the drawing thin wire from the alloy Pd-5Ni process. The studies used the software developed by the authors using the methods of calculating the drawing process and the computer model implemented in the DEFORM 3D software package. By way of calculation, a drawing route was determined, including 14 transitions, and the efforts of deforming the metal were found when producing wire with a diameter of 0.075. For this mode of deformation processing using the DEFORM 3D software package, we simulated the drawing process and established the temperature and stress distribution over the volume of the workpiece. The simulation results confirmed that the calculated safety factor for drawing is in the range of 2.85-3.43, which ensures a stable process of deformation of the metal without breaks and, as a consequence, an increase in productivity and yield of the suitable metal. Experimental studies have confirmed the adequacy of the developed model, so it can be used to analyze the process of drawing wire from other precious metal alloys. The results of the research are recommended to improve the production technology of thin wire from the alloy Pd-5Ni for the manufacture of catalytic gripping grids.

Simulation of High-Speed Cutting Using Deform 3D Software

2020 ◽  
Vol 299 ◽  
pp. 340-344
Author(s):  
Leonid Moiseevich Gurevich ◽  
Roman Novikov ◽  
Alexander Bannikov
Keyword(s):  
Software Package ◽  
High Speed ◽  
Rake Angle ◽  
Cutting Process ◽  
Work Piece ◽  
High Speed Cutting ◽  
3D Software ◽  
Deform 3D

The paper presents the result of the simulation of high-speed hot cutting process for ordinary and new saw geometry, using the Deform 3D software package. It was shown that the use of an additional side rake angle allows to controllably leave burr on one side of the work-piece only, and shift max stress from the saw gullets to the top of teeth.

scholarly journals Simulation of High Pressure Separator Used in Crude Oil Processing

Processes ◽  
2018 ◽  
Vol 6 (11) ◽  
pp. 219 ◽  
Author(s):  
Najah Al-Mhanna
Keyword(s):  
High Pressure ◽  
Flow Rate ◽  
Software Package ◽  
Gas Flow ◽  
Sensitivity Study ◽  
Simulation Software ◽  
Operating Conditions ◽  
Gas Concentration ◽  
Oil Processing ◽  
Simulation Results

The aim of this research was to simulate a high-pressure (HP) separator in order to investigate the effect of changing separator operating conditions on product properties. In this study, the results obtained using the CHEMCAD simulation software package were compared with those obtained using the UniSim software package. The simulation results were comparable with industrial data. A sensitivity study was conducted by changing the gas stream properties, such as temperature, pressure, and flow rate, in order to investigate and optimize the process. The results showed that increasing the separator inlet pressure from 30 to 80 bar decreased the outlet gas flow rate from 1202 to 871.15 kmol/h. Also, the methane mole fraction increased from 0.69 to 0.74; however, the preheater heating duty was increased from 8.71 to 11.48 GJ/h. The simulation results showed that increasing the temperature of the separator feed stream from 43 to 83 °C increased the flow rate of the outlet gas stream from 871.15 to 1142.98 kmol/h. However, this temperature change reduced the methane concentration in the gas product and decreased the heating duty of the heat exchanger. Finally, the study demonstrated that there is no effect of increasing the inlet feed flow rate on the produced methane gas concentration.

scholarly journals The simulation of cold volumetric stamping by the method of transverse extrusion

2018 ◽  
Vol 224 ◽  
pp. 01105
Author(s):  
Anatoly K. Belan ◽  
Vladimir A. Nekit ◽  
Olga A. Belan
Keyword(s):  
Computer Simulation ◽  
Finite Element ◽  
Finite Element Model ◽  
Production Process ◽  
Software Package ◽  
Theoretical Study ◽  
Initial Conditions ◽  
Element Model ◽  
Variation Principle ◽  
Deform 3D

The article is devoted to the theoretical study and development of the production process of manufacturing rod products with larger heads by transverse extrusion. For carrying out researches the elastic-plastic finite-element model based on the variation principle was chosen. This model, due to the development of a complex of boundary and initial conditions, has been adapted to the scheme of volume stamping of the fasteners and implemented in the form of a software package in the system DEFORM 3D. The paper presents the results of computer simulation of the technology of manufacturing the mortgage bolt

Dynamic Behavior of a Thin-Walled Cylindrical Workpiece During the Turning-Cutting Process, Part 2: Experimental Approach and Validation

2002 ◽  
Vol 124 (3) ◽  
pp. 569-580 ◽  
Author(s):  
K. Mehdi ◽  
J.-F. Rigal ◽  
D. Play
Keyword(s):  
Dynamic Behavior ◽  
Experimental Approach ◽  
Element Model ◽  
Central Place ◽  
Operating Conditions ◽  
Cutting Process ◽  
Turning Process ◽  
Cylindrical Workpiece ◽  
Thin Walled ◽  
The Stability

Chatter vibrations in the cutting process have a central place in many machining applications. A numerical and theoretical approach of self-excited vibrations during the turning process of thin-walled hollow workpieces has been presented in the accompanying paper. Furthermore, a finite element model has been proposed to simulate the dynamics of the system. The response to a Dirac excitation, presented as Nyquist curves, is proposed in order to characterize the dynamics of the turning process and the stability criterion. In this the second part of two related papers, the main objective is to validate the simulated dynamic behavior by using the experimental approach. The results of machining tests performed on thin-walled tubes with steel and aluminum alloys, using different operating conditions (dimensions, geometry and setting conditions) are presented and discussed.

Experimental Study and Numerical Simulation on Slamming of High-Speed Trimaran

2010 ◽  
Author(s):  
Xiangshao Kong ◽  
Weiguo Wu ◽  
Xiaobian Li ◽  
Shuangxi Xu ◽  
Yuanzhou Zheng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Element Model ◽  
Research Field ◽  
Simulation Software ◽  
Scale Model ◽  
Nonlinear Simulation ◽  
Simulation Results ◽  
Reduced Scale ◽  
Cross Structure

The study on slamming of high speed trimaran is a very complicated and significant topic. Ship slamming is a nonlinear unsteady problem in which dynamic boundary and coupling among structure, air and water should be considered. It is a key issue in the ship research field. Unlike the slamming of ordinary monohull, trimaran slamming include not only main hull bottom slamming, but also slamming of trimaran cross structure, which makes trimaran slamming more complicated. In this paper, a reduced scale model of trimaran was constructed and an experiment was carried out in order to study the slamming pressure distribution on main hull and cross structure. By using nonlinear simulation software Autodyn, a finite element model was established to simulate the process that trimaran model enters into water. The accuracy and reliability of numerical simulation is validated by comparing experimental data and numerical simulation results. Furthermore, some valuable conclusions on trimaran slamming are obtained.

scholarly journals Investigation of the Thickness Differential on the Formability of Aluminum Tailor Welded Blanks

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 875
Author(s):  
Jie Wu ◽  
Yuri Hovanski ◽  
Michael Miles
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Numerical Model ◽  
Plastic Strain ◽  
Finite Element Model ◽  
Equivalent Plastic Strain ◽  
Element Model ◽  
Dome Height ◽  
Tailor Welded Blanks ◽  
Simulation Results

A finite element model is proposed to investigate the effect of thickness differential on Limiting Dome Height (LDH) testing of aluminum tailor-welded blanks. The numerical model is validated via comparison of the equivalent plastic strain and displacement distribution between the simulation results and the experimental data. The normalized equivalent plastic strain and normalized LDH values are proposed as a means of quantifying the influence of thickness differential for a variety of different ratios. Increasing thickness differential was found to decrease the normalized equivalent plastic strain and normalized LDH values, this providing an evaluation of blank formability.

Simulation and Experiment on the Residual Stress in Super-High Speed Grinding

2010 ◽  
Vol 135 ◽  
pp. 238-242
Author(s):  
Yue Ming Liu ◽  
Ya Dong Gong ◽  
Wei Ding ◽  
Ting Chao Han
Keyword(s):  
Residual Stress ◽  
High Speed ◽  
Element Model ◽  
Residual Stress Distribution ◽  
X Ray Diffraction ◽  
Machined Surface ◽  
X Ray ◽  
High Speed Grinding ◽  
Simulation And Experiment ◽  
Cylindrical Workpiece

In this paper, effective finite element model have been developed to simulation the plastic deformation cutting in the process for a single particle via the software of ABAQUS, observing the residual stress distribution in the machined surface, the experiment of grinding cylindrical workpiece has been brought in the test of super-high speed grinding, researching the residual stress under the machined surface by the method of X-ray diffraction, which can explore the different stresses from different super-high speed in actual, and help to analyze the means of reducing the residual stresses in theory.

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