Design and Analysis of an Industrial, Progressive Die for Cutting and Forming

2021 ◽  
Author(s):  
Nikolaos Skampardonis ◽  
SOTIRIOS TSIRKAS ◽  
Spyridon Grammatikopoulos
Keyword(s):  
Computer Aided Design ◽  
Analysis Tool ◽  
Element Analysis ◽  
Progressive Die ◽  
High Productivity ◽  
Mathematical Formulas ◽  
Material Economy ◽  
Design Software ◽  
Aided Design ◽  
High Degree

Abstract Nowadays, many components which were earlier cast or machined have now been replaced by steel metal stampings. Material economy and the resultant reduction in weight and cost, high productivity and a high degree of possible precision have made press-work essential for many mass-produced products such as electronic appliances, utensils and car parts. Although, laser-cut technology is widely developed and more flexible in terms of variety of produced components, it cannot reach the extremely high productivity rates of a progressive die. Progressive die can perform a sequence of operations, in different stations at a single stroke of press. In this work, an innovative progressive die consists of two stations was designed, in order to produce a complex metal part with three different manufacturing processes. The components of the die have been calculated by mathematical formulas and empirical data, designed with Computer Aided Design software and analyzed by Finite Element Analysis tool.

Preliminary Design and Analysis Tool for Aeroengine Turbine Fixings

2014 ◽  
Author(s):  
Abdulhalim Twahir ◽  
François Roy ◽  
Magdy Attia ◽  
Hany Moustapha
Keyword(s):  
Computer Aided Design ◽  
Structural Integrity ◽  
Turbine Rotor ◽  
Analysis Tool ◽  
Preliminary Design ◽  
Element Analysis ◽  
Batch Mode ◽  
Previous Design ◽  
Time Savings ◽  
Aided Design

A single platform D&A (Design & Analysis) tool is outlined in this paper that allows a user, through a single GUI (Graphical User Interface), to create a turbine rotor fixing as well as analyze the structural integrity of the fixing. This is done through the integration of CAD (Computer Aided Design) and FEA (Finite Element Analysis) software running in batch mode, driven by the GUI. This SPIE (Single Platform Integration Environment) captures the strength of CAD software to create a fully parameterized fixing that is able to model legacy, current designs and provides flexibility to design fixings not yet conceived. Using the automated use of FEA software through a secure and reliable gateway, stress analysis can be performed and the results displayed back to the user through the GUI. This tool provides a significant increase in quality and time savings to design a fixing when compared to the previous design methodologies. What used to take hours to design and analyze through the use of isolated specialist built and owned tools with little communication between them and non-ideal data management, now takes minutes; a reduction of up to 10 fold in the time taken.

scholarly journals Effect of linkage design of an elbow implant on micro-motion: a finite element analysis

2020 ◽  
Vol 9 (2) ◽  
pp. 390
Author(s):  
Milad Heidari ◽  
Pooyan Rahmanivahid
Keyword(s):  
Finite Element ◽  
Computer Aided Design ◽  
Finite Element Analyses ◽  
Element Analysis ◽  
Linkage Design ◽  
Micro Motion ◽  
Design Software ◽  
Processing Software ◽  
Aided Design ◽  
Arthroplasty Failure

The major reason for total elbow arthroplasty failure is loosening. Loosening is the outcome of a detrimental mechanical incident, which causes the failure of the bond between the bone bed and implant. The shape of the linkage of an elbow implant has a considerable role to transfer a portion of the load to the cement-bone and cement-implant interfaces. Therefore, in this study, the linkage of an elbow implant was modified to reduce loosening using finite element analyses. Elbow bone was constructed using image processing software. Linkage components were modeled using modeling computer-aided design software. Material properties and boundary conditions were applied. The stress distribution and micro-motion were obtained in linkage component and cement-implant-bone interfaces respectively. Based on our results, sub-design 3B proved less interface micro-motion compared to others. Our study showed that modification of a linkage reduces the micro-motion transferred to bone-cement and cement-implant interfaces. A reduction of micro-motion, through linkage modification, may improve the clinical outcomes.  

New Pneumatic Rubber Leg Mechanism for Omnidirectional Locomotion

2014 ◽  
Vol 8 (2) ◽  
pp. 222-230 ◽  
Author(s):  
Mohamed Najib Ribuan ◽  
◽  
Koichi Suzumori ◽  
Shuichi Wakimoto
Keyword(s):  
Computer Aided Design ◽  
Design Parameters ◽  
Soft Robot ◽  
Element Analysis ◽  
Linear Finite Element ◽  
Design And Manufacturing ◽  
Aided Design ◽  
High Degree ◽  
Good Agreement ◽  
Microscope Stage

This paper describes a new pneumatic rubber leg mechanism for omnidirectional locomotion. The new mechanism was adopted from a pneumatic balloon actuator where translation and bending motions are produced as a result of balloon deformation. It was constructed using five chambers: one on the top and centered over four bottom chambers arranged in a square. Several possible designs were simulated to achieve the optimal design using a non-linear finite element analysis that considered the design parameters and the geometrical and material non-linearity of the elements. Prototyping was then performed using a rapid and efficient silicone rubber molding fabrication process based on computer-aided design and manufacturing. The experimental results were in good agreement with the analytical results. In conclusion, we have established a new rubber leg mechanism with a high degree of freedom to realize omnidirectional locomotion for a soft robot base, delicate object conveyance, and / or microscope stage applications.

scholarly journals Edge Models with the CAD Software: Creating a New Context for Mathematics in Elementary School

2021 ◽  
Author(s):  
Felicitas Pielsticker ◽  
Ingo Witzke ◽  
Amelie Vogler
Keyword(s):  
Elementary Schools ◽  
Digital Media ◽  
Computer Aided Design ◽  
Subjective Experience ◽  
Fourth Graders ◽  
Point Of View ◽  
Toulmin Model ◽  
Geometric Objects ◽  
Design Software ◽  
Aided Design

AbstractDigital media have become increasingly important in recent years and can offer new possibilities for mathematics education in elementary schools. From our point of view, geometry and geometric objects seem to be suitable for the use of computer-aided design software in mathematics classes. Based on the example of Tinkercad, the use of CAD software — a new and challenging context in elementary schools — is discussed within the approach of domains of subjective experience and the Toulmin model. An empirical study examined the influence of Tinkercad on fourth-graders’ development of a model of a geometric solid and related reasoning processes in mathematics classes.

scholarly journals Comparison of Computer Extended Descriptive Geometry (CeDG) with CAD in the Modeling of Sheet Metal Patterns

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 685
Author(s):  
Manuel Prado-Velasco ◽  
Rafael Ortiz-Marín
Keyword(s):  
Sheet Metal ◽  
Computer Aided Design ◽  
Parametric Modeling ◽  
Descriptive Geometry ◽  
The Novel ◽  
Forming Process ◽  
Solid Models ◽  
Design Software ◽  
Solid Edge ◽  
Aided Design

The emergence of computer-aided design (CAD) has propelled the evolution of the sheet metal engineering field. Sheet metal design software tools include parameters associated to the part’s forming process during the pattern drawing calculation. Current methods avoid the calculation of a first pattern drawing of the flattened part’s neutral surface, independent of the forming process, leading to several methodological limitations. The study evaluates the reliability of the Computer Extended Descriptive Geometry (CeDG) approach to surpass those limitations. Three study cases that cover a significative range of sheet metal systems are defined and the associated solid models and patterns’ drawings are computed through Geogebra-based CeDG and two selected CAD tools (Solid Edge 2020, LogiTRACE v14), with the aim of comparing their reliability and accuracy. Our results pointed to several methodological lacks in LogiTRACE and Solid Edge that prevented to solve properly several study cases. In opposition, the novel CeDG approach for the computer parametric modeling of 3D geometric systems overcame those limitations so that all models could be built and flattened with accuracy and without methodological limitations. As additional conclusion, the success of CeDG suggests the necessity to recover the relevance of descriptive geometry as a key core in graphic engineering.

scholarly journals Simulation Study of a Composite Landig Gear of Ultralight and Very Light Aircraft

2021 ◽  
Author(s):  
Paulina Zenowicz
Keyword(s):  
Simulation Study ◽  
Computer Aided Design ◽  
Landing Gear ◽  
Design Tool ◽  
Drop Test ◽  
Environment Design ◽  
Element Analysis ◽  
Computer Methods ◽  
The One ◽  
Aided Design

There is a need to design new, lighter aircraft structures, which has a direct impact on the safety and costs of aircraft maintenance. One of basic parts of an aircraft is ites landing gear, whose main functions are to enable taxiing, safe landing, take-off, and to assist the remainder of ground operations. Landing gear failures are usually related to metallurgy, processing, environment, design, and causes of overload. These are conditions that can be prevented using modern methods to calculate the strength of such a landing gear in various conditions. The paper presents stages of a simulation study of the fixed three-wheeled spring landing gear for an ultralight aircraft. Analysis of forces acting on the landing gear during drop test and their implementation by numerical computer methods allowed for the creation of a model in the CAD (Computer-Aided Design) tool and its FEA (Finite Element Analysis). These results were compared between a modeled classic spring landing gear and the one made of composite materials. The further goal of the research will be to build a drop test stand for a small landing gear used in airplanes and drones. This method has a significant impact on simplifying the design of the landing gear, its modeling, and optimization.

Effect of infill and density pattern on the mechanical behaviour of ABS parts manufactured by FDM using Taguchi and ANOVA approach

2021 ◽  
Vol 111 (2) ◽  
pp. 66-77
Author(s):  
M. Othmani ◽  
K. Zarbane ◽  
A. Chouaf
Keyword(s):  
Tensile Strength ◽  
Computer Aided Design ◽  
Numerical Test ◽  
Acrylonitrile Butadiene Styrene ◽  
Tensile Behaviour ◽  
Element Analysis ◽  
Mechanical Tensile ◽  
Experimental Values ◽  
The Cost ◽  
Aided Design

Purpose: The present work aims to investigate the effect of many infill patterns (rectilinear, line, grid, triangles, cubic, concentric, honeycomb, 3D honeycomb) and the infill density on the mechanical tensile strength of an Acrylonitrile Butadiene Styrene (ABS) test specimen manufactured numerically by FDM. Design/methodology/approach: Computer-Aided Design (CAD) software has been used to model the geometry and the mesostructure of the test specimens in a fully automatic manner from a G-code file by using a script. Then, a Numerical Design of Experiments (NDoE) has been carried out by using Taguchi method and the Analysis of Variance (ANOVA). The tensile behaviour of these numerical test specimens has been studied by the Finite Element Analysis (FEA). Findings: The FEA results showed that a maximal Ultimate Tensile Strength (UTS) was reached by using the ‘concentric’ infill pattern combined with an infill density of 30%. The results also show that the infill pattern and the infill density are significant factors. Research limitations/implications: The low infill densities of 20% and 30% that have already been used in many previous studies, we have also applied it in order to reduce the time of the simulations. Indeed, with high infill density, the simulations take a very excessive time. In an ongoing study, we predicted higher percentages. Practical implications: This study provided an important modelling tool for the design and manufacture of functional parts and helps the FDM practitioners and engineers to manufacture strong and lightweight FDM parts by choosing the optimal process parameters. Originality/value: This study elucidated the effect of various infill patterns on the tensile properties of the test specimens and applied for the first time a NDoE using numerical test specimens created by the mesostructured approach, which considerably minimized the cost of the experiments while obtaining an error of 6.8% between the numerical and the experimental values of the UTS.

Finite Element Analysis for a CAD of a Concrete Mixer Drum

1994 ◽  
Author(s):  
Hossam S. Badawi ◽  
Sherif A. Mourad ◽  
Sayed M. Metwalli
Keyword(s):  
Finite Element ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Plain Concrete ◽  
Element Analysis ◽  
Shell Elements ◽  
Bending Stresses ◽  
Loading Effects ◽  
Concrete Mixer ◽  
Aided Design

Abstract For a Computer Aided Design of a concrete truck mixer, a six cubic meter concrete mixer drum is analyzed using the finite element method. The complex mixer drum structure is subjected to pressure loading resulting from the plain concrete inside the drum, in addition to its own weight. The effect of deceleration of the vehicle and the rotational motion of the drum on the reactions and stresses are also considered. Equivalent static loads are used to represent the dynamic loading effects. Three-dimensional shell elements are used to model the drum, and frame elements are used to represent a ring stiffener around the shell. Membrane forces and bending stresses are obtained for different loading conditions. Results are also compared with approximate analysis. The CAD procedure directly used the available drafting and the results were used effectively in the design of the concrete mixer drum.

Analysis and Processing of Index Tests Results at Double-Adjust Hydraulic Turbines with a Computer-Aided Design Software

2016 ◽  
Vol 823 ◽  
pp. 396-401
Author(s):  
Adrian Cuzmoş ◽  
Dorian Nedelcu ◽  
Constantin Viorel Câmpian ◽  
Cristian Fănică ◽  
Ana Maria Budai
Keyword(s):  
Computer Aided Design ◽  
Computer Aided ◽  
Hydraulic Turbines ◽  
Design Software ◽  
Index Tests ◽  
Aided Design

The paper presents a method developed and used by the CCHAPT researchers for the graphic plotting of the index tests results for hydraulic turbines, the comparison of the efficiency curves resulted from testing to those obtained by the model transposition [1] i.e. the determination and comparison of the existing combinatory cam with that obtained from tests.The method presented in the paper was born from the need for processing and presenting the results of index tests within the shortest delay and eliminating the errors that might occur in the results plotting.

Sign in / Sign up

Export Citation Format

Share Document