scholarly journals Application of brazing process design in optimization structure design of scraper

2018 ◽  
Vol 175 ◽  
pp. 03017
Author(s):  
Bin Zhao ◽  
Yuanbin Fang ◽  
Linjie Zhang
Keyword(s):  
Shear Strength ◽  
Optimization Design ◽  
Design Research ◽  
Welding Process ◽  
Rake Angle ◽  
Structure Design ◽  
Resistance Force ◽  
Optimization Analysis ◽  
Relief Angle ◽  
Working Resistance

To effectively enhance the service life, the research of milling machine scraper structure design and welding process are optimized. Through the structural optimization analysis, the improved structure is obtained, and the working resistance force is reduced. The full factor test is used to optimize the brazing process, and the best parameters are obtained, which improves the shear strength. The accuracy of the model is verified by experiments. The results show that compared with the working resistance force, the improved scraper tends to be slow and the peak value is smaller. The cutting rake and relief angle of the scraper are optimized. When the cutting rake angle is 6° and the cutting relief angle is 9°, both working resistance force and impact force are minimum. It proves the accuracy of the simulation results. Using CT861 solder, brazing temperature is 75°C, and the brazing time is 10s. While the cooling method uses furnace cold, the minimum value of shear strength is 200MPa. The average working life of the scraper is raised from 800 hours to 1600 hours after the optimization design. Research results have guiding significance for the structure design and the welding process optimization of the scraper.

Finite Element Optimization Design of the Drum of Storage Winch

2011 ◽  
Vol 295-297 ◽  
pp. 2501-2505
Author(s):  
Kai An Yu ◽  
Yu Yu Wang ◽  
Ke Yu Chen
Keyword(s):  
Finite Element ◽  
Wall Thickness ◽  
Optimization Design ◽  
Maximum Stress ◽  
Maximum Principal Stress ◽  
Structure Design ◽  
Operation Condition ◽  
Optimization Analysis ◽  
Element Analysis ◽  
Main Components

In order to make the structure design of winch drum reasonable and reduce the gross mass of winch, the main components of storage winch were optimize designed on the premise of not affecting the safety use of storage winch. By applying the SoildWorks software, the storage winch model was established, and finite element analysis for the model was also carried out by Simulation. The maximum principal stress of drum under the most dangerous operation condition was obtained, and wall thickness of drum, web thickness, web position and hub thickness were all optimized. After the optimization analysis, it was found that the maximum stress on the drum decreased but then increased along with the increase of the wall thickness of drum. Meanwhile, the unreasonable structure was improved and the gross mass of drum of storage winch was reduced. Furthermore, the more reasonable structure design was achieved. The study provided important theoretical basis for the product design.

Optimum Design for the Frame of Open Type Abrasive Flow Polish Machine

2012 ◽  
Vol 497 ◽  
pp. 89-93
Author(s):  
Liang Liang Yuan ◽  
Ke Hua Zhang ◽  
Li Min
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Finite Element Methods ◽  
Optimization Design ◽  
Low Cost ◽  
Three Dimensional ◽  
Force Model ◽  
Optimization Analysis ◽  
Open Type ◽  
Set Up

In order to process heterotype hole of workpiece precisely, an open abrasive flow polish machine is designed, and the optimization design of machine frame is done for low cost. Firstly, basing on the parameters designed with traditional ways, three-dimensional force model is set up with the soft of SolidWorks. Secondly, the statics and modal analysis for machine body have been done in Finite element methods (FEM), and then the optimization analysis of machine frame has been done. At last, the model of rebuild machine frame has been built. Result shows that the deformation angle value of machine frame increased from 0.72′ to 1.001′, the natural frequency of the machine decreased from 75.549 Hz to 62.262 Hz, the weight of machine decreased by 74.178 Kg after optimization. It meets the strength, stiffness and angel stiffness requirement of machine, reduces the weight and cost of machine.

scholarly journals Porosity Characteristics and Effect on Tensile Shear Strength of High-Strength Galvanized Steel Sheets after the Gas Metal Arc Welding Process

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1077 ◽  
Author(s):  
Seungmin Shin ◽  
Sehun Rhee
Keyword(s):  
Shear Strength ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
High Strength ◽  
Galvanized Steel ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Tensile Test Specimen ◽  
Metal Arc Welding

In this study, lap joint experiments were conducted using galvanized high-strength steel, SGAFH 590 FB 2.3 mmt, which was applied to automotive chassis components in the gas metal arc welding (GMAW) process. Zinc residues were confirmed using a semi-quantitative energy dispersive X-ray spectroscopy (EDS) analysis of the porosity in the weld. In addition, a tensile shear test was performed to evaluate the weldability. Furthermore, the effect of porosity defects, such as blowholes and pits generated in the weld, on the tensile shear strength was experimentally verified by comparing the porosity at the weld section of the tensile test specimen with that measured through radiographic testing.

Optimal Design of Spatial Grid Structure Using Group Search Optimization

2011 ◽  
Vol 243-249 ◽  
pp. 6044-6048 ◽  
Author(s):  
Bing Yuan ◽  
Feng Ming Ren ◽  
Gen Quan Zhong ◽  
Jing Zhou
Keyword(s):  
Optimization Design ◽  
Element Model ◽  
Optimization Methods ◽  
Grid Structure ◽  
Optimization Analysis ◽  
Search Optimization ◽  
Spatial Grid ◽  
The One ◽  
Group Search ◽  
Design Proposal

An economic and safety design proposal of the spatial grid structure is very difficult to find according to traditional design method.The group search optimization and its improved algorithm are applied in optimization design of a spatial grid structure in this paper. In this paper the finite element model of the spatial grid structure is firstly built through the platform of ANSYS. Then based on the parameterized programme language ADPL of ANSYS ,the group search optimization (GSO) and the quick group search optimization(QGSO ) are compiled ,the optimization analysis of the spatial grid structure are carried out. Finally, the optimization results and the optimization one from ANSYS are compared. It show that the optimization methods hereinbefore are feasible and the design proposals of them are better than the one of ANSYS.

Ring debarking efficiency of frozen balsam fir logs is affected by the radial force but not by the log position on the stem

2020 ◽  
Vol 50 (12) ◽  
pp. 1323-1332 ◽  
Author(s):  
Wassim Kharrat ◽  
Roger E. Hernández ◽  
Claudia B. Cáceres ◽  
Carl Blais
Keyword(s):  
Shear Strength ◽  
Quality Indicators ◽  
Abies Balsamea ◽  
Rake Angle ◽  
Radial Force ◽  
Balsam Fir ◽  
Bark Thickness ◽  
Edge Radius ◽  
Wood Fibres ◽  
Surface Increase

The effect of the radial force applied by a ring debarker tip to frozen balsam fir (Abies balsamea (L.) Mill.) logs, obtained at three positions on the stem, was studied. A one-armed ring debarker prototype was built, which controlled the radial force, the rake angle, and cutting and feed speeds. Balsam fir logs at −19 °C were debarked at three levels of radial force. The rake angle, tip overlap, tip edge radius, and cutting and feed speeds were kept constant. Debarking quality was evaluated by two criteria: the proportion of bark remaining on log surfaces and the amount of wood fibres in bark residues. Log characteristics (dimensions, eccentricity, bark thickness, and knot features), bark–wood shear strength, and the basic densities of sapwood and bark were also measured. Results showed that the radial force had a significant effect on debarking quality. The proportion of bark remaining on log surfaces increased while the amount of wood fibres in bark residues decreased as radial force decreased. A radial force of 18.5 N·mm−1 is suggested for an optimal debarking quality. In contrast, log position on the stem did not affect the debarking quality indicators. Results also showed that the proportion of bark remaining on log surfaces increases as bark–wood shear strength and the proportion of knot surface increase, while the amount of wood fibres in bark residues increases as bark–wood shear strength decreases and logs are more eccentric. The results give useful information to improve the debarking process within the studied range of log diameters and debarking parameters.

Energy-Saving Optimization Design Frame System Using Energy Footprint Graphical Model

2016 ◽  
Vol 693 ◽  
pp. 1971-1974
Author(s):  
Ying Tian ◽  
Lei Zhang ◽  
Tai Yong Wang ◽  
Song Ling Tian ◽  
Peng Lin Li
Keyword(s):  
Optimization Design ◽  
Graphical Model ◽  
Structure Design ◽  
Product Families ◽  
Component Structure ◽  
Flow Maps ◽  
Analysis Methodology ◽  
Industrial Distribution ◽  
Energy Footprint ◽  
Frame System

Product’s performance should be sustainable the environment, which is accepted and be accomplished by more and more companies and people. While some of these methods used well in some special fields may damage the environment in the other period of product related lifecycle phrase. This paper propose an integrated solving environmental analysis methodology based on the unified energy footprint graphic model, which can systematic describe all the produce activities impacted with the external environment by tracing the energy footprint in the uniformed energy flow maps. This frame system can also be divided into three ranks, which can be used clearly to deal with the energy-related environmental problem from the product component structure design to the manufactory processes optimization even to the product families’ research and industrial distribution as a whole.

scholarly journals Lightweight Design of Front Suspension Upright of Electric Formula Car Based on Topology Optimization Method

2020 ◽  
Vol 11 (1) ◽  
pp. 15 ◽  
Author(s):  
Jixiong Li ◽  
Jianliang Tan ◽  
Jianbin Dong
Keyword(s):  
Topology Optimization ◽  
Optimization Design ◽  
Lightweight Design ◽  
Geometric Model ◽  
Load Condition ◽  
Optimization Method ◽  
Structure Design ◽  
Front Suspension ◽  
Emergency Braking ◽  
Topology Optimization Method

In order to obtain a lightweight front upright of an electric formula car’s suspension, the topology optimization method is used in the front upright structure design. The mathematical model of the lightweight optimization design is constructed, and the geometric model of the initial design of the front upright is subjected to the ultimate load condition. The structural optimization of a front upright resulted in the mass reduction of the upright by 60.43%. The optimized model was simulated and verified regarding the strength, stiffness, and safety factor under three different conditions, namely turning braking, emergency braking, and sharp turning. In the experiment, the uprights were machined and assembled and integrated into the racing suspension. The experimental results showed that the optimized front uprights met the requirements of performance.

scholarly journals Multiobjective Optimization Design for Structural Parameters of TBM Disc Cutter Rings Based on FAHP and SAMPGA

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Laikuang Lin ◽  
Yimin Xia ◽  
Dun Wu
Keyword(s):  
Multiobjective Optimization ◽  
Optimization Design ◽  
Structural Parameters ◽  
Rock Breaking ◽  
Ring Structure ◽  
Structure Design ◽  
Disc Cutter ◽  
Load Bearing ◽  
Geological Conditions ◽  
Weight Coefficients

As a key component of tunnel boring machines (TBMs), the disc cutter ring and its structural parameters are closely related to the TBM tunneling quality. Literature review shows that investigations on optimization design methods for cutter ring structure are seriously insufficient. Therefore, in this paper, a multiobjective optimization design model of structural parameters for disc cutter rings is developed based on the complex geological conditions and the corresponding cutter ring structure design requirements. The rock breaking capability, energy consumption, load-bearing capability, wear life, and wear uniformity of disc cutter are selected as the objectives, and the geometric structure of cutter rings, ultimate load-bearing capability, and cutterhead drive performance are determined as constraints. According to the characteristics of this model, a self-adaptive multipopulation genetic algorithm (SAMPGA) is utilized to solve the optimization problem, and the Fuzzy analytical hierarchy process (FAHP) is employed to calculate weight coefficients for multiple objectives. Finally, the applicability of the proposed method is demonstrated through a case study in a TBM project. The results indicated that the rock breaking performance and service life of the disc cutter are improved after optimization by using the proposed method. The utilization of SAMPGA effectively solves the premature local convergence problems during optimization. The geological adaptability should be considered in the cutter ring structure design, which can be realized by using the proposed method based on the suitable weight coefficients.

Persistence Design on English Test Questions Library System Based on Hibernate

2014 ◽  
Vol 543-547 ◽  
pp. 4573-4576
Author(s):  
Jin Hua Zhou
Keyword(s):  
Design Research ◽  
Logical Structure ◽  
Structure Design ◽  
System Construction ◽  
Test Question ◽  
College English ◽  
Library System ◽  
Efficient Management ◽  
Object Relational ◽  
Digital Test

English test questions library based on computer technology and English test theories, is a collection of digital test question and test papers, to achieve the scientific and efficient management of test questions and test papers. For difficult problems in college English test questions library system construction, this paper studies the persistence design on English test questions library based on Hibernate. Firstly, research on Hibernate architecture, and through graphics to display; Then, test questions library structure design, including conceptual structure design and logical structure design; Next, the design rules of persistent classes and design examples; Finally, the Hibernate mapping files related elements are described, and carries on the example design. Research method has the object/relational database mapping, transparent persistence, low invasive, good transplantation, and other advantages.

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