Weld Contour Measurement of Fillet Weld by Reverse Engineering Technique

Volume 3 ◽  
2004 ◽  
Author(s):  
Chia-Lung Chang ◽  
Yen-Hung Chen
Keyword(s):  
Reverse Engineering ◽  
Laser Scanning ◽  
Rapid Assessment ◽  
Low Carbon Steel ◽  
Scanning System ◽  
Low Carbon ◽  
Cross Sectional ◽  
Fillet Weld ◽  
Premature Failure ◽  
Engineering Technique

The external geometry of the fillet weld plays an important role in the strength of the weld. Two factors that influence the external geometry of the fillet weld are weld size and profile. The fillet weld must be made to the weld size and profile as specified in the welding code. Unacceptable profile not only is a defect of the weld but also produces stress risers that reduce the fatigue strength. Insufficient weld that reduces the cross sectional area of weld throat may cause premature failure. Visual inspection and weld gages are two most widely used simple tools to provide a rapid assessment of the external geometry of the fillet weld. In this study, the reverse engineering technique, which a laser scanning system integrates with CAD software, is used to provide a more accurate measurement of the weld contour. The weld samples were made of low-carbon steel plates with T-joint using CO2 welding. The weld volume, weld size and convexity were determined from CAD model to evaluate the weld quality. The reverse engineering technique provides a more accurate and efficient method to inspect the external geometry of fillet weld.

Complex 3D Measuring by Multiple Laser Scanning of Automotive Parts

2013 ◽  
Vol 837 ◽  
pp. 511-516
Author(s):  
Adrian Catalin Voicu ◽  
Gheorghe I. Gheorghe
Keyword(s):  
Reverse Engineering ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Correct Choice ◽  
3D Scanning ◽  
Single Step ◽  
Graph Representation ◽  
Scanning System ◽  
Production Environment ◽  
Virtual Design

For over 20 years the term"three-dimensional scan"(3D) showed the world the possibilities of virtual design, simulation, or reverse engineering. 3D scanning is also known as 3D digitizing, the name coming from the fact that this is a process that uses a contact or non-contact digitizing probe to capture the objects form and recreate them in a virtual workspace through a very dense network of points (xyz) as a 3D graph representation. Until recently, digitization was limited by the speed of the scan head and the correct choice of the probing system, type of scanned piece and budget for the purchase or develops the scanning system. With the evolution of technology appeared a number of new techniques that tend to improve the properties of classical methods. Even if intended for copying or geometrical control, or rather virtual geometric modelling or product realization, there are two groups of technologies: with contact (classical methods with probes) or without contact (laser, optical or combination). Most automotive manufacturers currently use 3D scan metrology based on optical or laser systems to validate products quality. The pieces are initially measured by 3D scanning then they are compared with the designed model (CAD file) using a specialized software. By this comparison producer can interfere very quickly in the manufacturing process to remove the cause of defects, this technique being called Reverse Engineering (RE). There are many variables that affect accuracy of laser scanning and therefore the quality of information: reflectance of surface, colour object, recesses, openings narrow and sharp edges can be difficult to scan. This accuracy may vary from micron to millimetre and the acquisitions size from a few points to several thousand points per second. The overall accuracy of a 3D acquisition system depends above all on the sensors precision and on the acquisition device (acquisition with contact) or acquisition structure (acquisition without contact). In a perfect world or in an integrated production environment, 3D measuring systems should be able to measure all the necessary parameters in a single step without errors, and to render the results in the same way to the manufacturing networks equipped with computers, in formats useful for machines control and processes management.

Reverse Engineering Physical Models Employing Wrap-Around B-Spline Surfaces and Quadrics

1996 ◽  
Vol 210 (2) ◽  
pp. 147-157 ◽  
Author(s):  
D J Weir ◽  
M J Milroy ◽  
C Bradley ◽  
G W Vickers
Keyword(s):  
Reverse Engineering ◽  
Computer Aided Design ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Surface Fitting ◽  
Physical Models ◽  
Scanning System ◽  
Cad Model ◽  
Three Dimensional Model ◽  
B Spline

Reverse engineering involves digitizing a three-dimensional model or part, by means of a tactile or non-contact optical sensor, converting the data to a CAD (computer aided design) database description and manufacturing by CNC (computer numerical controlled) machines. This paper demonstrates an effective approach to the reverse engineering of physical models by employing a three-dimensional laser scanning system in conjunction with surface-fitting software developed by the authors. Accurate surface data are collected by the laser scanner and then input to the surface-fitting software. Surface entities such as B-spline and quadric functions are employed to build the CAD model. The CAD model is compatible with popular design and manufacturing software packages. A telephone receiver is used to illustrate the efficiency of the process.

Powder Metallurgical Solution for a Complex Geometry Coupler Requiring High Dimensional Stability and Microstructural Uniformity through Heat Treatment

2021 ◽  
Author(s):  
Craig Stringer ◽  
Andy Wright ◽  
Pete Imbrogno
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Dimensional Stability ◽  
Complex Geometry ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Metal Powders ◽  
Machining Processes ◽  
Premature Failure ◽  
Processing Optimization

Abstract Powder metallurgy (PM) is the fabrication process of compacting metal powders to shape and sintering these compacts to yield the final material’s properties. The PM compaction process allows for complex geometries to be formed that would normally lead to long and expensive machining processes from wrought steels. Special alloy selection can allow for hardening of the microstructure during the sintering procedure. The sinter hardened (SH) alloys exhibit good mechanical properties along with good hardenability and dimensional stability and may be a suitable replacement for wrought steels where low distortion from heat treatment or microstructural control is required. In this study, it was found for a complex geometry coupler application, a SH alloy could successfully replace an austenitizing heat treatment process with a low carbon steel. The low carbon steel was found to have micro heterogeneities from heat treatment that lead to premature failure in the application. Dimensional distortion and production variance were also of concern with the low carbon steel. The SH material demonstrated acceptable physical properties, hardness and microstructural uniformity to solve the concerns associated with processing of the low carbon steel coupler. Post processing optimization also added to the life performance of the coupler by tailoring the final microstructure to mating components.

CAD Modeling of Part Assemblies Using Reverse Engineering Technique

2012 ◽  
Vol 591-593 ◽  
pp. 7-10 ◽  
Author(s):  
Roxana Pescaru ◽  
Gheorghe Oancea
Keyword(s):  
Reverse Engineering ◽  
Software Package ◽  
3D Scanning ◽  
Scanning System ◽  
Technical Documentation ◽  
Cad Modeling ◽  
Engineering Technique ◽  
The Creation ◽  
Solid Type

This paper aims to highlight the utility of implementing the Reverse Engineering Technique in designing assembly parts in the field of industry. Starting from the iconic part models the project begins with the specific stages for Reverse Engineering technique, the part digitization by means of a 3D scanning system, followed by the reconstruction of the solid type parts, and ending with their parameterization. Parameterization is of great importance especially in what concerns the automated obtaining of the part models, since this allows updating the solids along with the change of parameters. In this paper it will be also presented a case study - done by means of the CATIA software package – which demonstrates the creation of parametric solids starting from physical parts for which no technical documentation is available.

Nanostructured Surface Layers In Low Carbon Steel and Pure Titanium Induced By High-Speed Rotating Wire-Wheel Deformation

2010 ◽  
Vol 97-101 ◽  
pp. 1352-1355
Author(s):  
Xin Min Fan ◽  
Fei Yan Liu ◽  
Jie Wen Huang
Keyword(s):  
Surface Layer ◽  
Carbon Steel ◽  
High Speed ◽  
Pure Titanium ◽  
Low Carbon Steel ◽  
Coarse Grained ◽  
Commercially Pure Titanium ◽  
Low Carbon ◽  
Cross Sectional ◽  
Average Grain Size

A nanostructure surface layer was produced on low carbon steel and commercially pure titanium using high-speed rotating wire-wheel deformation (HRWD). The microstructural features of the surface layer were systematically characterized by cross-sectional optical microcopy observations, transmission electron microscopy, and microhadness measurement was conducted along the depth from top surface layer to matrix of the samples. The results show that nearly equiaxed nanocrystalline layer is formed on the surface of the low carbon steel and pure titanium, in which the average grain size is about 8 nm and 15 nm respectively. The microhardness of the top surface is enhanced obviously compared with that of the coarse-grained matrix.

Transversed Residual Stress Analysis on Multipassed Fillet Weld 2D-Using FEM and Experiment

2012 ◽  
Vol 576 ◽  
pp. 181-184
Author(s):  
Mohd Ridhwan Mohammed Redza ◽  
Yupiter H.P. Manurung ◽  
Robert Ngendang A. Lidam ◽  
Mohd Shahar Sulaiman ◽  
Mohammad Ridzwan Abdul Rahim ◽  
...  
Keyword(s):  
Residual Stress ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Simulation Method ◽  
Low Carbon ◽  
Robotic Welding ◽  
Element Analysis ◽  
Fillet Weld ◽  
Simulation And Experiment ◽  
Fea Simulation

In this project, the residual stress due to multipassed welding process at the fillet weld will be studied using 2D Finite Element Analysis (FEA) simulation method and experimental investigation. Due to the extensive capabilities and dedicated tools for the simulation of welding, including material deposit via element activation or deactivation and predefined or customized moving heat sources, SYSWELD 2010 was chosen as the FEA software. The material with a thickness of 9 mm was structural steel S355J2G3 for simulation and low carbon steel for the experiment. The clamping condition was selected to obtain the best relationship between simulation and experiment by using Strain Gage. The model was dedicated to multipassed welding using the robotic welding system

Application of Reverse Engineering Technology on Beverage Packaging

2012 ◽  
Vol 271-272 ◽  
pp. 782-786
Author(s):  
Chun Sheng Tao ◽  
Qiao Bai ◽  
Song Bai Ma
Keyword(s):  
Reverse Engineering ◽  
Point Cloud ◽  
Laser Scanning ◽  
Scanning System ◽  
Point Cloud Data ◽  
Engineering Technology ◽  
Cloud Data ◽  
Engineering Software ◽  
Laser Scanning System ◽  
Beverage Packaging

This article briefly introduces the concept, processes and key technologies of reverse engineering. It demonstrate the feasibility and significance of application of reverse engineering technology on beverage packaging by rebuilding the model for a beverage bottle with complex geometries: firstly, acquiring point cloud data of the beverage bottle by 3D laser scanning system; then processing point cloud data and materializing model by using reverse engineering software; finally, rebuilding CAD model. The application could provide a new method of designing beverage packaging.

scholarly journals ANALISA PENGGUNAAN SILICON CONTROLLED RECTIFIER PADA ELEKTROPLATING TEMBAGA/BAJA KARBON RENDAH

Infotekmesin ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 6-11
Author(s):  
Vicky Prasetia ◽  
Roy Aries Permana T
Keyword(s):  
Low Carbon Steel ◽  
Maximum Flow ◽  
Copper Coating ◽  
Low Carbon ◽  
Cross Sectional ◽  
Copper Electroplating ◽  
Strong Current ◽  
Coating Mass ◽  
Metal Materials ◽  
Coating Time

Electroplating is one of the engineering improvements in the characteristics of metal materials. Copper coating is a pre-coating before further coating for steel. The surface area of the material is in line with the strong current requirements required for the normal coating process. However, too much current flowing into the cathode results in erosion at the anode. Silicon Controlled Rectifier (SCR) is a component made of semiconductor silicon. It has a function as a controller or switch. Silicon Controlled Rectifiers can be used to reduce coating currents in copper electroplating. The setting of the coating current can be done on copper electroplating of low carbon steel cathodes with a cross-sectional area of 7500 mm2 of 4.5 A; 5 A; 6 A; 6.5 A and 6.7 A. The best copper coating results with a 10 minute coating time are shown in the current 6.5 A with a coating mass of 1.11 grams and 1.06 grams. This proves the need for a reduction in the maximum flow so that optimal coating is achieved.

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