Geometric Parameters Optimization of Cable-Driven Parallel Robot with a Movable Gripper

2021 ◽  
pp. 61-71
Author(s):  
Elena V. Gaponenko ◽  
Dmitry I. Malyshev ◽  
Victoria S. Kuzmina ◽  
Larisa A. Rybak
Keyword(s):  
Parallel Robot ◽  
Geometric Parameters ◽  
Parameters Optimization

Geometric Parameters Optimization Design for Aluminum Alloy Welding Joint Based on Increasing Fatigue Strength

2011 ◽  
Vol 704-705 ◽  
pp. 1106-1111 ◽  
Author(s):  
Xue Song Liu ◽  
Ping Wang ◽  
Zhong Jie Yan ◽  
Qiang Wang ◽  
Hong Yuan Fang
Keyword(s):  
Fatigue Strength ◽  
Stress Concentration ◽  
Optimization Design ◽  
Fatigue Property ◽  
Geometric Parameters ◽  
Parameters Optimization ◽  
Tig Welding ◽  
Weld Toes ◽  
Welding Joint ◽  
Weld Toe

The geometric parameters of the welding joint had an important effect on fatigue strength, so the stress concentration of the typical double sided asymmetric V-notch joint on high speed train was calculated, the relationship between geometric parameters and the stress distribution of the welding joint was analyzed by FEM, also the geometric parameters optimization design of welding joint was proposed. According to theoretical optimization design scheme, the geometric parameters optimization adopted shaping the weld joint by manual TIG welding and processing circle arc on weld toes by milling respectively,. and the fatigue property of the welding joint optimized by different methods was tested. By comparing the experimental results, it was found that manual TIG welding was difficult to obtain the favorable weld toe angle to decrease the stress concentration, and the welding joint was softened obviously. Accordingly, it revealed that the fatigue property was lower than that of initial joint in fatigue testing. On the contrary, the radius of the weld toes circle arc can be controlled accurately by mechanical processing. The stress concentration was reduced obviously by rounding off the weld toe, as a result the fatigue strength of the welding joint could be increased remarkably. Keywords: A7N01, optimization design, geometric parameters of welding joint, FEM

Geometric Parameters Optimization of Carbide Reamer when Reaming TC18

2020 ◽  
Vol 866 ◽  
pp. 12-21
Author(s):  
W. Yang ◽  
W.P. Dong ◽  
W. Wang ◽  
Y. Li ◽  
Yong Guo Wang
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Simulation Model ◽  
Experimental Method ◽  
Cutting Temperature ◽  
Geometric Parameters ◽  
Parameters Optimization ◽  
Cutting Fluid ◽  
Machining Accuracy ◽  
Factors Influencing

Cutting temperature is one of the most important parameters in the cutting process, which has an important influence on the machining accuracy of workpiece, the power consumed by the machining and the degree of tool wear. There are many factors influencing the cutting temperature, such as the properties of workpiece materials, geometric parameters of the tool, the use of cutting fluid and so on. In this paper, we used orthogonal experimental method, with titanium alloy TC18 as the carrier and AdvantEdge as the simulation platform, established the cutting simulation model. With the cutting temperature as the optimization goal, the geometric parameters of the cemented carbide reamer are optimized.

Workspace and Singularity Characteristics of 3-DOF Planar Parallel Robots

2009 ◽  
Author(s):  
Ming Huang
Keyword(s):  
Computer Simulations ◽  
Parallel Robot ◽  
Parallel Robots ◽  
Geometric Parameters ◽  
Kinematic Structure ◽  
Link Length ◽  
End Effector ◽  
Serial Chain ◽  
Parametric Studies ◽  
Position And Orientation

A study of workspace and singularity characteristics is presented for two common types of 3-DOF planar parallel robot manipulators. The robots considered feature a kinematic structure with 3 in-parallel actuated, R-R-R and R-P-R serial chain geometries. In this study, computer simulations aided with graphic visualization were used to characterize the complete pose workspace (for ranges of both position and orientation) and the singularity inherent to the systems. Parametric studies have also been performed to ascertain the way in which both characteristics vary with respect to various geometric parameters such as pivot location, link length, and platform size for end-effector. Results are shown by way of a unique composite ratio of the available workspace to the density of singularity within that workspace.

GEOMETRIC PARAMETERS OPTIMIZATION OF THE CONE-AND-BLADE DRILLING BIT WITH MOVABLE BEARINGS

2018 ◽  
pp. 8-12
Author(s):  
E.A. Petrovsky ◽  
◽  
A.K. Danilov ◽  
V.V. Bukhtiyarov ◽  
D.M. Chepil ◽  
...  
Keyword(s):  
Geometric Parameters ◽  
Parameters Optimization ◽  
Drilling Bit

Technology-Oriented Synchronous Optimal Design of a 4-Degrees-of-Freedom High-Speed Parallel Robot

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Gang Han ◽  
Fugui Xie ◽  
Xin-Jun Liu ◽  
Qizhi Meng ◽  
Sai Zhang
Keyword(s):  
Optimal Design ◽  
Parameter Optimization ◽  
High Speed ◽  
Degrees Of Freedom ◽  
Interaction Mechanism ◽  
Optimization Method ◽  
Parallel Robot ◽  
Parallel Robots ◽  
Parameters Optimization ◽  
Nonlinear Design

Abstract Parameters optimization is complicated by various parameters and nonlinear design problems. In this paper, the interaction mechanism of motion/force transmissibility and various parameters on normalized motor torque and speed of a four degrees-of-freedom (4-DOF) high-speed parallel robot is analyzed. Based on this interaction mechanism, evaluation indices of acceleration capacity, speed ability, and adept cycle time are proposed. Through combining these indices with task requirements and technical criteria of driving systems, the technology-oriented constraints are set up and a parameter optimization method is proposed. With this method, the dimensional parameters, driving system specifications, and work pose of the robot have been synchronously optimized to ensure low driving torque and high pick-and-place frequency. This synchronous optimal design method is general and can be further applied to parameter optimization for different types of parallel robots.

Experimental Study and Simulation Analysis on Ball-End Cutter Milling Titanium Alloy Based on the Geometric Parameters Optimization

2013 ◽  
Vol 589-590 ◽  
pp. 427-432
Author(s):  
Yao Nan Cheng ◽  
Shuo An ◽  
Xian Li Liu ◽  
Yue Zhang ◽  
Lei Shi
Keyword(s):  
Titanium Alloy ◽  
Simulation Analysis ◽  
Complex Surface ◽  
Geometric Parameters ◽  
Parameters Optimization ◽  
Tool Geometry ◽  
End Mill ◽  
Ball End Mill ◽  
Milling Force ◽  
Milling Parameters

Titanium alloy materials are widely used in the field of aero-engine, the complex surface forming of key parts usually use the ball end mill. First, optimized and designed tool based on the main geometric parameters of the tool, the experimental researching on solid carbide ball end mill milling TC4 titanium alloy was performed based on orthogonal combination of geometric parameters. Second, made a concrete analysis of the milling force collected in the experiment, tool geometry parameters were optimized based on the theoretical and practical. Then analyzed the optimized tool milling force changing rules under finite element milling simulation. Influence of milling parameters on milling force was analyzed with the single factor experiment for the optimized tool, milling parameters were optimized by drawing the force curve. The above studies provide a reference for the actual production of titanium alloy semi-finishing and finishing in tool design and milling parameters selection.

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