scholarly journals The Analysis Research of Affected Factors of Spinning Force

2016 ◽  
Author(s):  
Zhanjun Liu
Keyword(s):  
Spinning Force

Influence of Roller on Tooth Height of Internal Spline Formed by Spin-Forming

2012 ◽  
Vol 522 ◽  
pp. 268-271
Author(s):  
Ling Yan Sun ◽  
Qin Xiang Xia ◽  
Xiu Quan Cheng ◽  
Bang Yan Ye
Keyword(s):  
New Technology ◽  
Internal Surface ◽  
Height Distribution ◽  
Forming Force ◽  
Nose Radius ◽  
Forming Process ◽  
Element Simulation ◽  
Gear Manufacturing ◽  
Spinning Force

Spin-forming of part with internal tooth is a new technology of the near-net forming in gear manufacturing field. And the main purpose of the parts spin-forming is to shape teeth on the internal surface of blank. In order to improve the forming quality of internal tooth, the effect of roller on tooth height of spline was investigated by processing experiments and finite element simulation. The result indicates that, for full-radius roller, a large nose radius has also witnessed a discernible growth in spinning force and tooth height; considering the uniformity of tooth height distribution of spun part and decrease in forming force, the bio-conical roller is more suitable for this forming process

Study on Spinning of Pentagonal Cross-Section Hollow-Part Based on Orthogonal Experiment Design

2011 ◽  
Vol 314-316 ◽  
pp. 783-788 ◽  
Author(s):  
Qin Xiang Xia ◽  
Ying Pin Wang ◽  
Ning Yuan ◽  
Xiu Quan Cheng
Keyword(s):  
Feed Rate ◽  
Thickness Distribution ◽  
Reduction Ratio ◽  
Test Method ◽  
Relative Height ◽  
Forming Quality ◽  
Maximum Reduction ◽  
Fea Simulation ◽  
Hollow Part ◽  
Spinning Force

The investigation of the effect of processing parameters on forming quality has been one of the highlight researches in spinning. The thickness distribution is an important criterion to evaluate the forming quality. Spinning force affects the processing and equipment design greatly. Combining with the FEA simulation and orthogonal test method, taking the maximum reduction ratio in thickness of workpiece and the maximum spinning force as the evaluation criterion, the esequence of the main forming parameters, such as the feed rate and roundness radius of roller, and the relative height of workpiece were analyzed based on an orthogonal scheme of three-factor and three-level. Both FEA simulation and experiment results show that, during the pentagonal section hollow-part spinning, the influence sequence on the maximum reduction ratio in thickness is relative height of workpiece, feed rate and roundness radius of roller; the influence sequence on the maximum spinning force is relative height of workpiece, roundness radius of roller and feed rate.

The FEM Numerical Simulation of Die Spinning with Three-Dimensional

2013 ◽  
Vol 567 ◽  
pp. 81-86
Author(s):  
Zhi Yang ◽  
W.L. Zhou
Keyword(s):  
Three Dimensional ◽  
Element Model ◽  
Shape Distortion ◽  
Tube Spinning ◽  
Spinning Process ◽  
Deformation Behaviors ◽  
Cylindrical Workpiece ◽  
Spinning Speed ◽  
Three Dimensional Finite Element ◽  
Spinning Force

A three-dimensional finite element model for die spinning of a cylindrical workpiece is established and a practical spinning process of 5A06 alloy tube is simulated with the model and Marc software. The rotation of the workpiece driven by the die and the passive rotations of spinning wheels due to the friction between the spinning wheels and the workpiece are considered in this model. The distributions of stress and strain of deformation region are analyzed. The phenomena during tube spinning are simulated, such as build-up, shape distortion, diametric reduction and increment. From the simulated results, it is concluded: Consideration of the quality and efficiency of production, spinning speed should not be too large. In this study, the simulation process should not exceed 0.8mm/s the traction speed. Spinning force is direct proportional to the traction speed and inverse proportion to the tip radius. This model reprents the spinning deformation behaviors completely. Simulation results correspond with the experiments very well.

scholarly journals Rotational feeding in caecilians: putting a spin on the evolution of cranial design

2006 ◽  
Vol 2 (4) ◽  
pp. 485-487 ◽  
Author(s):  
G. John Measey ◽  
Anthony Herrel
Keyword(s):  
Prey Size ◽  
Evolutionary Significance ◽  
Generalist Predators ◽  
Head Width ◽  
X Ray ◽  
Video Recordings ◽  
Axis Body ◽  
Spinning Force ◽  
Shed Light

Caecilians are a poorly known group of amphibians with a highly derived skull and cranial musculature that has evolved in response to their specialized head-first burrowing lifestyle. They possess a unique jaw-closing system, which is shown to be capable of generating considerable bite forces for its head width (1.09±0.34 and 0.62±0.31 N for Schistometopum thomense and Boulengerula taitanus , respectively). However, comprehensive dietary studies indicate that there is no need for large bite forces, since most caecilians appear to be generalist predators of subterranean macrofauna. Here, we demonstrate, based on in vivo external and X-ray video recordings of animals feeding, that long-axis body rotations are used independent of prey size by these two species of caeciliid caecilians when feeding underground. Further, we show that individuals are capable of generating a substantial spinning force, which is greater than their bite force (1.35±0.26 and 1.02±0.18 N, respectively). These observations shed light on the functional and the evolutionary significance of several unique features of the cranial design in derived caecilians; spinning may allow the individuals to judge prey size and subsequently reduce oversized prey within gape limits.

Simulation of Shear Spinning Process for Pressure Vessel Components

2007 ◽  
Author(s):  
Jian-Hua Zhao ◽  
Henri Champliaud ◽  
Thien-My Dao
Keyword(s):  
Deformation Behaviour ◽  
Thickness Distribution ◽  
Shell Element ◽  
Die Design ◽  
Fe Model ◽  
Proposed Model ◽  
Spinning Process ◽  
Deformation Force ◽  
Spinning Force ◽  
Shear Spinning

Spinning process for the medium- and small-lot production of axisymmetric components has many advantages, such as smaller deformation force, simpler tool-and-die design, and lower investment in equipment, over conventional forming processes. It has been widely used in aerospace, energy and defense industry. This paper presents a 3-D elastoplastic finite element (FE) model for the simulation of the shear spinning process, in order to study deformation behaviour and design proper process parameters for the spinning process. The proposed model has the following characteristics: i) a shell element is used to mesh the contact pairs between the workpiece (a metal blank) and the tool sets (a pressing roller and a mandrel); ii) the offset thickness of the shell element is considered during contact treatment; iii) the movement of the roller and the fixing of the central blank and mandrel are treated as the boundary condition; iv) relative movement between the roller and the blank is treated as a spiral feeding process. FEM simulations for shear spinning with aluminum have been implemented, using a dynamic explicit scheme, on ANSYS/LS-DYNA software. Spinning force, thickness distribution and stress distribution have been studied under various roller feeds and inclined angles of mandrel. The simulation results have provided good confirmation with the experiments.

A study of the spinning force of hollow parts with triangular cross sections

2013 ◽  
Vol 68 (9-12) ◽  
pp. 2461-2470 ◽  
Author(s):  
Q. X. Xia ◽  
Z. Y. Lai ◽  
Hui Long ◽  
X. Q. Cheng
Keyword(s):  
Cross Sections ◽  
Spinning Force

Three-directional contact force model for the ball spinning of a thin-walled tube

2018 ◽  
Vol 233 (3) ◽  
pp. 500-507
Author(s):  
Chun-jiang Zhao ◽  
Meng-ying Su ◽  
Zheng-yi Jiang ◽  
Jiang Lian-yun ◽  
Xiaorong Yang ◽  
...  
Keyword(s):  
Frictional Heating ◽  
Contact Boundary ◽  
Force Model ◽  
Calculation Error ◽  
Coordinate Plane ◽  
Thin Walled Tube ◽  
Ball Spinning ◽  
Thin Walled ◽  
Force Calculation ◽  
Spinning Force

This paper provides a computational model for calculating three-directional ball spinning force in accordance with the theory of space analytic geometry. The contact boundary equation of the ball and tube is obtained. By projection, the two-dimensional curve in each coordinate plane is acquired. The projected area of the contact zone in the coordinate plane is calculated through the curve integral. It is assumed that the average pressure of the forming region is nearly equal to that when the steel ball is pressed into the tube. Hence, the unit pressure of the deformation zone is obtained. Then, the spinning component force and total spinning force are calculated. Using a Tu1 thin-walled tube of oxygen-free copper as experimental object, a ball spinning experiment is conducted, the axial spinning components force are tested and the ball spinning force calculation model is verified. Based on deformation rate, backward sliding accumulation and extension and frictional heating, the factors influencing calculation error are analysed at the end of this paper.

Finite Element Simulation of Backward Ball Spinning of Thin-Walled Tube with Longitudinal Inner Ribs

2010 ◽  
Vol 97-101 ◽  
pp. 111-115 ◽  
Author(s):  
Yan Qiu Zhang ◽  
Shu Yong Jiang ◽  
Yu Feng Zheng ◽  
Li Hong Zhao
Keyword(s):  
Finite Element ◽  
Deformation Zone ◽  
Compressive Strain ◽  
Tangential Direction ◽  
Force Component ◽  
Element Simulation ◽  
Ball Spinning ◽  
Thin Walled ◽  
Force Components ◽  
Spinning Force

Backward ball spinning is applied to manufacturing thin-walled tubular part with longitudinal inner ribs. Rigid-plastic finite element method (FEM) is used to simulate and analyze backward ball spinning of thin-walled tubular part with longitudinal inner ribs. The fields of stress and strain in the deformation zone of the spun part are obtained by means of FEM. Finite element simulation results show that the deformation zone of the spun part is caused to be in a three-dimensional compressive stress state. The deformation zone in the inner rib is under the tensile strain in the radial and axial direction, and the compressive strain in the tangential direction. The wall deformation zone beside the inner rib is under the compressive strain in the radial direction, and the tensile strain in the axial and tangential direction. The three spinning force components all increase with the increase of the stroke of the ball. Furthermore, of all the three spinning force components, the radial force component is greater than the other two force components, and the tangential force component is minimum.

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