Simulation Study on the High-Speed Single-Point Accumulation Forming Process of Involute Spline

2010 ◽  
Vol 450 ◽  
pp. 441-444 ◽  
Author(s):  
Yan Li ◽  
Ming Shun Yang ◽  
Qi Long Yuan ◽  
Feng Kui Cui
Keyword(s):  
Process Simulation ◽  
High Speed ◽  
Single Point ◽  
Practical Application ◽  
Forming Process ◽  
Forming Mechanism ◽  
Fea Model ◽  
Forming Technology ◽  
Cold Roll ◽  
Involute Spline

The high-speed cold roll-beating technology is adopted to realize the single-point accumulation forming of involute spline. Firstly, the principle of the forming technology is analyzed. Then the FEA model of the cold roll-beating of involute spline is built, the forming process simulation is finished with the ANSYS/LS-DYNA software to obtain the stress, strain and the metal flowing law of the forming process. Finally the experiments are carried out to verify the feasibility of the simulative results. This study can provide guidance for further study of the forming mechanism and practical application of the single-point accumulation forming technology.

Analysis of Lead Screw High-Speed Roll-Beating Forming

2010 ◽  
Vol 455 ◽  
pp. 151-155 ◽  
Author(s):  
Yan Li ◽  
L. Zhang ◽  
Ming Shun Yang ◽  
Qi Long Yuan
Keyword(s):  
Process Simulation ◽  
High Speed ◽  
Incremental Forming ◽  
Single Point ◽  
The Self ◽  
Forming Process ◽  
Lead Screw ◽  
Forming Technology ◽  
Cold Roll ◽  
Simulation Results

Lead screw high-speed cold roll-beating is a new single-point incremental forming technology which is die-free and unconstrained. The principle of the forming process is analyzed. Modeling, meshing and parameter selecting for forming process simulation with ABAQUS are discussed. The lead screw cold roll-beating forming process simulation is carried out; stress & strain changes and metal flowing law are analyzed. Experiments are carried out with the self-developed experimental equipment. The experimental results are consistent with the simulation results, thus the validity of the simulation and feasibility of the forming process are verified.

Study on Microstructure Evolution during the Cold Roll-Beating of 40Cr

2014 ◽  
Vol 490-491 ◽  
pp. 256-261 ◽  
Author(s):  
F.K. Cui ◽  
G.P. Yan ◽  
H. Liu ◽  
X.Q. Wang ◽  
Y.X. Li
Keyword(s):  
Microstructure Evolution ◽  
High Speed ◽  
Forming Process ◽  
Forming Mechanism ◽  
Theoretical Support ◽  
Cold Roll ◽  
Macroscopic Deformation ◽  
Micro Level ◽  
Microscopic Change ◽  
The Relationship

For revealing the forming mechanism in micro level and for establishing the relationship between macroscopic deformation and microscopic changes, impact experiment of material property is conducted under the high speed cold roll-beating condition based on the plastic deformation mechanism of metal material, Based on the Zener-Hollomon constitutive relation, the macro change model is established, and the parameters of the 40 Cr are obtained according to the experimental data. Based on the model of microstructure evolution of dislocation density, the relation between macroscopic change and microscopic change is established, which provides the theoretical support for the forming process in micro level and revels the relationship between macro deformation and micro changes in the forming process of high speed cold roll-beating.

Dieless Water Jet Incremental Micro-Forming

2018 ◽  
Author(s):  
Yi Shi ◽  
Jian Cao ◽  
Kornel F. Ehmann
Keyword(s):  
Process Parameters ◽  
Thin Shell ◽  
High Speed ◽  
Single Point ◽  
Sheet Thickness ◽  
Water Jet ◽  
Micro Forming ◽  
Forming Process ◽  
Thin Foils ◽  
High Pressure Water Jet

Compared to the conventional single-point incremental forming (SPIF) processes, water jet incremental micro-forming (WJIMF) utilizes a high-speed and high-pressure water jet as a tool instead of a rigid round-tipped tool to fabricate thin shell micro objects. Thin foils were incrementally formed with micro-scale water jets on a specially designed testbed. In this paper, the effects on the water jet incremental micro-forming process with respect to several key process parameters, including water jet pressure, relative water jet diameter, sheet thickness, and feed rate, were experimentally studied using stainless steel foils. Experimental results indicate that feature geometry, especially depth, can be controlled by adjusting the processes parameters. The presented results and conclusions provide a foundation for future modeling work and the selection of process parameters to achieve high quality thin shell micro products.

Principle and Simulation Study on Multi Point-Single Point Incremental Combined Forming for Sheet Metal

2009 ◽  
Vol 626-627 ◽  
pp. 273-278 ◽  
Author(s):  
X.J. Li ◽  
Ming Zhe Li ◽  
C.G. Liu ◽  
Zhong Yr Cai
Keyword(s):  
Sheet Metal ◽  
Single Point ◽  
Experimental Result ◽  
Work Piece ◽  
The Novel ◽  
Forming Process ◽  
Explicit Finite Element ◽  
Forming Defect ◽  
Forming Technology ◽  
Elastic Cushion

Based on Multi-Point (MP) forming technology and Single-Point Incremental (SPI) forming technology, MP-SPI combined forming method for sheet metal is proposed, the principle and two different forming techniques are illustrated firstly. Then the paper is focused on numerical analysis for the novel forming technique with explicit Finite Element (FE) algorithm. During simulation of spherical work-piece, dimpling occurs as a main forming defect in MP-SPI combined forming process. Simulation results show that the dimpling defect can be suppressed effectively by using elastic cushion. An appropriate thickness of elastic cushion is necessary to prevent dimpling. And also the deformation of the work-piece is sensitive to the shape of elastic cushion. The combined forming test shows that the numerical simulation result is closed to the experimental result.

Forming Process and Mechanism of Microcapillary Grooves of Miniature Cylindrical Heat Pipe

2011 ◽  
Vol 328-330 ◽  
pp. 22-26 ◽  
Author(s):  
Zhen Ping Wan ◽  
Yao Chao Li
Keyword(s):  
Heat Pipe ◽  
High Speed ◽  
Electronics Cooling ◽  
Critical Issue ◽  
High Heat ◽  
High Heat Flux ◽  
Forming Process ◽  
Technical Parameters ◽  
Forming Mechanism ◽  
Ball Number

Miniature heat pipe is one of promising means of removing high heat flux for electronics cooling in limited available space. How to produce narrow and deep microcapillary grooves is the critical issue in promoting performance of axially grooved miniature heat pipe. In this work, the microcapillary grooves for miniature cylindrical heat pipe was fabricated by using oil-filled high speed spinning method. The forming process of microcapillary grooves was investigated. The influence of technical parameters on characteristics of microcapillary grooves was analyzed and the optimal technical parameters were found out. The experimental results show that drawing speed ranging from 48cm/min to 64cm/min, spinning ball number of 4 and big distance between the end of multi-tooth mandrel and the center of spinning balls within 3.7 mm should be chosen to obtain narrow and deep microcapillary grooves. In addition, the forming mechanism was investigated by observing microstructure of cross-section of microcapillary grooved tubes.

The Forming Process Simulation of Magnesium Alloy Control Arm of Automobile and its Mold Design

2014 ◽  
Vol 494-495 ◽  
pp. 262-265 ◽  
Author(s):  
Shi Gang Wang ◽  
Fu Sheng Gao ◽  
Shun Chen
Keyword(s):  
Finite Element Analysis ◽  
Magnesium Alloy ◽  
Process Simulation ◽  
Squeeze Casting ◽  
Mold Design ◽  
Analysis Software ◽  
Forming Process ◽  
Element Analysis ◽  
Forming Technology ◽  
Distribution Of Stress

Taking the control arm of automobile as subject, this thesis discusses the mold design with the squeeze casting forming technology and the simulation of magnesium alloy control arm of automobile in the isothermal forming process using finite element analysis software DEFORM. From the simulation, obtains the data of stress, the distribution of stress and temperature in the forming process, concluding that the best condition of forming 6061 control arm of automobile is under the temperature 400 , and rate 3 mm/s.

scholarly journals Process simulation-based evaluation of design and operational implications of water-laid paper machine conversion to foam technology

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5148-5186
Author(s):  
Lotta Sorsamäki ◽  
Antti Koponen ◽  
Eemeli Hytönen
Keyword(s):  
Process Simulation ◽  
Paper Industry ◽  
Simulation Software ◽  
Strategic Decision ◽  
Process Efficiency ◽  
Process Equipment ◽  
Paper Machine ◽  
Forming Process ◽  
Forming Technology ◽  
Foam Forming

Foam forming technology has attracted much attention during the past few years in the paper industry. Its advantages compared to conventional water forming are a new product portfolio and increased process efficiency. To support the paper industry in pushing foam forming technology forward, process simulation is needed to provide supporting data for strategic decision-making and as a basis for equipment dimensioning. This study examined the conversion of an existing wallpaper machine from water to foam forming technology using process simulation. To determine the required process configuration and parameter changes in the existing process, both published and unpublished data on the foam forming process were collected. This paper also describes modeling of the foam phase in the selected simulation software. The suitability of existing paper process equipment for foam was analyzed. Simulations revealed that undisturbed operation with foam requires some equipment modifications and re-arrangements in water circuits. With foam forming, the water balance in both short and long circulation changes remarkably compared to conventional water forming, leading to a large increase in the long circulation volume flows.

scholarly journals Forming Mechanism of High-Speed Cold Roll Beating of Spline Tooth

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Ting Niu ◽  
Yong-Tang Li ◽  
Zhi-Qi Liu ◽  
Hui-Ping Qi
Keyword(s):  
Process Parameters ◽  
High Speed ◽  
Room Temperature ◽  
Electron Backscatter Diffraction ◽  
Forming Mechanism ◽  
Grain Sizes ◽  
Cold Roll ◽  
Subgrain Rotation ◽  
Electron Backscatter ◽  
Backscatter Diffraction

The spline tooth of ASTM 1045 was fabricated by high-speed cold roll-beating (HSCRB) process at room temperature. Microhardness of the spline tooth was examined by a nanoindenter. The grains and misorientation angle distributions were measured by electron backscatter diffraction (EBSD). The results showed that the microhardness was improved up to 1280 μm deep from the surface of the spine tooth. The microhardness and the grain sizes gradually decreased in the direction away from the surface. On the surface, the fraction of ultrafine grains increased up to about 90%, and the average grain diameter (which was ∼0.56 µm) decreased by 71.4%. The model of grain evolution during HSCRB process is proposed in this work. New grains appear first on the boundaries of the elongated grains within numerous subgrains. The elongated grains are refined as a result of subgrain rotation. By analyzing the HSCRB technical principle, we concluded that the process parameters affect the refinement degree of studied steel by determining beating pass, beating pass interval time, and strain rate.

Simulation Analysis of Metal Flow in High-Speed Cold Roll-Beating

2014 ◽  
Vol 556-562 ◽  
pp. 113-116 ◽  
Author(s):  
Feng Kui Cui ◽  
Ya Fei Xie ◽  
Xiao Dan Dong ◽  
Li Min Hou
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Metal Flow ◽  
Equivalent Strain ◽  
Flow State ◽  
Analysis Model ◽  
Forming Process ◽  
Element Analysis ◽  
Cold Roll ◽  
Flow Law

In order to achieve the metal flow law in high-speed cold roll-beating, the metal flow state was analyzed on the basis of the principle of high-speed cold roll-beating and the Law of Minimum Resistance. The finite element analysis model was established based on the processing of involute spline; high-speed cold rolling forming process was simulated. The equivalent strain and the flow track of a set of nodes on the contact surface on different time are analyzed, the flow law of each node is given, and simulation analysis result is compared with theoretical analysis result.

Formability of Tailored Welded Blanks in Single Point Incremental Forming Process

2014 ◽  
Vol 979 ◽  
pp. 339-342 ◽  
Author(s):  
Kittiphat Rattanachan ◽  
K. Sirivedin ◽  
Chatchapol Chungchoo
Keyword(s):  
Laser Welding ◽  
Incremental Forming ◽  
Single Point ◽  
Weld Line ◽  
Welding Process ◽  
Metal Sheet ◽  
Single Point Incremental Forming ◽  
Forming Process ◽  
Forming Technology ◽  
Dieless Forming

This paper is focused on single point incremental forming (SPIF) of a tailored welded blanks (TWBs) that produced by laser welding process. The SPIF process is a new dieless forming technology, which is a fast and economic solution to prototyping a metal sheet product. In the past, the SPIF researches carried out with the homogeneous metal sheet blank, but now a day, the demand of TWBs is still increased especially for an automotive industry. The aim of this research is to study the formability on the weld line of laser welding TWBs (SUS 304 and St 37) by the SPIF process.

Sign in / Sign up

Export Citation Format

Share Document