Rapid Design of Injection Molding of Plastic Buckle

2014 ◽  
Vol 602-605 ◽  
pp. 69-72
Author(s):  
Ren Xing Li ◽  
Ze Wang ◽  
Dong Mei Su ◽  
Xia Ye ◽  
Ya Ni Xu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Design Parameters ◽  
Optimized Design ◽  
Assembly Model ◽  
Cloud Data ◽  
Feature Lines ◽  
Injection Molded ◽  
Design Software ◽  
Injection Molded Plastic ◽  
Surface Generate

In order to achieve higher speed and better efficiency of the plastic buckle molding, Imageware, the reverse design software, was adopted in this paper to process the point cloud data of the plastic buckle, mesh feature lines and reconstruct the surface,and then the reconstructed plastic buckle model was imported into UG and saved in STL format with the powerful surface repair function of UG to suture discontinuous surfaces. Mold Wizards of UG, the mold design module, was used to create mold assembly model, design parting surface, generate three-dimensional solid model of molding parts according to STL format saved previously and eventually the injection-molded plastic buckle was analyzed with Moldflow / MPI. As was indicated, the optimized design parameters tally with the experimental results basically.

Extension of the Stator Vane Upstream Across the 180° Bend for a Multistage Radial Compressor Stage

2009 ◽  
Author(s):  
Christian Aalburg ◽  
Alexander Simpson ◽  
Jorge Carretero ◽  
Tue Nguyen ◽  
Vittorio Michelassi
Keyword(s):  
Three Dimensional ◽  
Design Procedure ◽  
Design Parameters ◽  
Optimized Design ◽  
Angle Distribution ◽  
Conventional Design ◽  
Stator Vane ◽  
Limited Applicability ◽  
Return Channel ◽  
Vane Angle

The design, analysis and optimization of a new stator concept for multistage centrifugal compressors using numerical methods is presented. The first objective was to further improve the performance of a well-optimized stage with a short vaneless diffuser, see Aalburg et al [1]. The second objective was to achieve a significant increase in the flow turning in the stator part. In order to achieve these goals an extension of the return channel vane upstream, over the U-turn bend, was considered. This design poses challenges that are quite different from those encountered for a conventional design. For example, a conventional vane angle distribution leads to lean angles across the bend that are not feasible from a manufacturing and aerodynamic perspective. In addition, conventional design tools for geometry generation were found to have limited applicability for this concept. To address these issues a geometry generator was developed that facilitated the design of three-dimensional across-the-bend type vanes with unconventional vane angle distributions. The geometry generator was based on an analytical design procedure similar to that outlined by Veress and Braembussche [2]. This procedure allows a desired loading distribution to be specified. In this paper the vane concept will be introduced, the development of the geometry generator will be outlined and the effect of varying design parameters will be considered. An optimized design will then be presented that outperformed the reference conventional design in terms of efficiency by up to one point across the operating range. This improvement was achieved despite a significantly higher vane loading.

Research on the Parameter Conversion of Mannequin Curve

2014 ◽  
Vol 543-547 ◽  
pp. 2656-2659
Author(s):  
Bo Ren ◽  
Ji Xin Yang ◽  
Peng Wan ◽  
Xue Heng Tao ◽  
Xue Jun Wang ◽  
...  
Keyword(s):  
Point Cloud ◽  
Three Dimensional ◽  
Measuring System ◽  
Reconstruction Method ◽  
Point Cloud Data ◽  
Cloud Data ◽  
Engineering Software ◽  
Parameter Conversion ◽  
Dimensional Reconstruction ◽  
Design Software

In order to realize the reverse design of human bodys curve, the curves parameter conversion and reconstruction based on non-contact measuring system are studied in the paper. Firstly, obtain the model of point cloud data by the non-contact measurement system, and then import the data into reverse the engineering software Geomagic. Second, process the point cloud data with the method of human characteristic curves and surfaces division, structure fitting surface, and get the three-dimensional reconstruction model of human bodys point cloud data. Lastly, import the model into the forward design software Solidworks with different methods and edit it. Then finish the parameter conversion from Geomagic to the forward design software. The reconstruction method has a good value in reverse design of the mold.

A Virtual Reality Environment for Synthesizing Spherical Four-Bar Mechanisms

1995 ◽  
Author(s):  
Scott W. Osborn ◽  
Judy M. Vance
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Design Space ◽  
Three Dimensional ◽  
Design Parameters ◽  
Spatial Problem ◽  
Virtual Reality Environment ◽  
Spatial Design ◽  
Design Software ◽  
Logical Extension

Abstract This paper describes the development of a virtual reality environment which facilitates the design of spherical four-bar mechanisms. The virtual environment allows the user to naturally interact with the input data and specify the design parameters while operating in a three-dimensional environment. We see this development as a logical extension of existing graphics-based spatial design software. The need for a three-dimensional design space is driven by the difficulty in specifying design inputs and constraints for a spatial problem using a two-dimensional interface. In addition, once the mechanism has been created, the virtual environment provides the opportunity for the user to visually verify that the mechanism will perform the desired three-dimensional motion.

A Numerical Investigation of Multi-Staged Tesla Valves

2013 ◽  
Author(s):  
Scott M. Thompson ◽  
D. Keith Walters ◽  
Basil J. Paudel ◽  
Tausif Jamal
Keyword(s):  
Reynolds Number ◽  
Numerical Simulations ◽  
Low Reynolds Number ◽  
Three Dimensional ◽  
Check Valve ◽  
Design Parameters ◽  
Optimized Design ◽  
Low Reynolds ◽  
The Individual ◽  
Tesla Valve

The Tesla valve is a passive-type check valve used for flow control/rectification in a variety of micro/mini-channel systems. Previous studies have focused on its optimal design and effectiveness (i.e. diodicity) for the low-Reynolds number regime (Re < 500). Using three-dimensional (3D) CFD, multiple, identically-shaped Tesla valves arranged in-series, i.e.: a Tesla “tree” or multi-staged Tesla valve (MSTV), were investigated. Fully-developed flow at the inlet and complete-laminar conditions throughout the entire valve structure were imposed on all numerical simulations. The number of Tesla valves, valve-to-valve distance and Reynolds number were varied to determine their effect on MSTV diodicity. The individual Tesla valves within each MSTV possessed pre-optimized design parameters as reported from the literature. Results clearly indicate that the MSTV can provide for a significantly higher diodicity than a single Tesla valve and that this MSTV diodicity increases with Reynolds number. Minimizing the distance between adjacent Tesla valves can significantly increase the MSTV diodicity and, for very low Reynolds number (Re < 50), the MSTV diodicity is near-independent of valve-to-valve distance and number of valves used. In general, more Tesla valves are required to maximize the MSTV diodicity as the Reynolds number increases. The current investigation also demonstrates that 3D numerical simulations more accurately predict the diodicity of a single Tesla valve over a wider range of Reynolds numbers.

scholarly journals Optimization model for polycrystalline diamond compact bits based on reverse design

2018 ◽  
Vol 10 (6) ◽  
pp. 168781401878149 ◽  
Author(s):  
Zhijiu Ai ◽  
Yiwei Han ◽  
Yuchun Kuang ◽  
Yuanji Wang ◽  
Mingming Zhang
Keyword(s):  
Design Method ◽  
Three Dimensional ◽  
Polycrystalline Diamond ◽  
Lateral Force ◽  
Design Parameters ◽  
Three Dimensional Model ◽  
Cloud Data ◽  
Cutter Design ◽  
Unbalance Force ◽  
Polycrystalline Diamond Compact

To improve the effectiveness and efficiency of bit cutter design, a new reverse design method is put forward based on the geometry of a polycrystalline diamond compact bit. The polycrystalline diamond compact bit design parameters (cutter parameters and polycrystalline diamond compact bit profile) are calculated based on the data obtained by three-dimensional scanning technology. The main calculation work is realized using MATLAB. Compared with using point cloud data, using the three-dimensional model based on calculated cutter parameters also provides accurate results. Then, the cutter parameters are optimized according to the minimum lateral force principle, minimizing the maximum wear rate principle. The lateral unbalance force of the bit decreases from 7.55%, for the original bit, to 3.17%, for the optimized bit, and the wear of the optimized drill bit is more uniform. The field data show that the optimization models create bits with a longer life and a higher rate of penetration.

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