A staged haptic rendering approach for virtual assembly of bolted joints in mechanical assembly

2018 ◽  
Vol 96 (1-4) ◽  
pp. 161-171 ◽  
Author(s):  
Jing-Rong Li ◽  
Jia-Wu Liu ◽  
Qing-Hui Wang ◽  
Guang-Hua Hu
Keyword(s):  
Virtual Assembly ◽  
Haptic Rendering ◽  
Bolted Joints ◽  
Mechanical Assembly

A Novel Haptic Rendering Algorithm for Stable and Precise 6-DOF Virtual Assembly

2010 ◽  
Author(s):  
Muli Liu ◽  
Dangxiao Wang ◽  
Yuru Zhang
Keyword(s):  
Virtual Assembly ◽  
Haptic Rendering ◽  
Mechanical Assembly ◽  
Constant Frequency ◽  
Refresh Rate ◽  
Assembly Features ◽  
Cad Models ◽  
Continuous Feedback ◽  
The Common ◽  
Six Degree Of Freedom

This paper presents a novel algorithm for six-degree-of-freedom (6-DOF) haptic rendering, providing a fast, stable and precise virtual assembly. This algorithm simplifies large and complex CAD models into simple geometric primes, to accelerate the collision detection and therefore the refresh rate. Analytic approach is employed to simulate the virtual assembly. The common assembly process is decomposed into two basic types of manipulations, axis-alignment assembly and face-mating assembly. Some special assembly features (thread, spline and gear, etc) are described in special parameters. The algorithm has been implemented and interfaced with a 6-DOF PHANToM Premium 3.0. We demonstrate its performance on force display of the mechanical assembly. The object with low clearances can be assembled, and the continuous feedback force can be guaranteed at a constant frequency of 1 kHz.

Haptic Rendering: Practical Modeling and Collision Detection

1999 ◽  
Author(s):  
ZhuLiang Cai ◽  
John Dill ◽  
Shahram Payandeh
Keyword(s):  
Surgical Training ◽  
Collision Detection ◽  
Object Representation ◽  
Virtual Assembly ◽  
Detection Algorithm ◽  
Haptic Rendering ◽  
3D Object ◽  
Modeling Techniques ◽  
Simulation Results ◽  
Fast Collision

Abstract 3D collision detection and modeling techniques can be used in the development of haptic rendering schemes which can be used, for example, in surgical training, virtual assembly, or games. Based on a fast collision detection algorithm (RAPID) and 3D object representation, a practical haptic rendering system has been developed. A sub-system determines detailed collision information. Simulation results are presented to demonstrate the practicality of our results.

Analysis of the Robotic Assembling Accuracy Based on Virtual Assembly Environment

2001 ◽  
Author(s):  
Zheng Zhang ◽  
Xuebuo Luo ◽  
Cunxi Xie
Keyword(s):  
Physical Modeling ◽  
Virtual Assembly ◽  
Behavioral Modeling ◽  
Accuracy Analysis ◽  
Error Source ◽  
Mechanical Assembly ◽  
Graphical Environment ◽  
Assembly Unit ◽  
High Flexibility ◽  
D Model

Abstract Multi-degree freedom robots have many advantages including agility, heavy-loading capability and high flexibility. They play a very important role in mechanical assembly. Due to the complexity of their spatial pose, the robot assembling accuracy analysis should not be confined to the 2-D plane. This paper applies the accuracy analysis to the virtual environment by constructing accurate models of robot assembly unit such as 3-D geometrical modeling, physical modeling, and behavioral modeling. Using the interactive and 3-D graphical environment to observe and evaluate the effects of assembling process. By operating the virtual 3-D model of the robot assembly unit and simulating the assembling process in the virtual assembly environment, the influence of errors in assembly can be analyzed and the statistical value of errors can be obtained. This paper also presents the method of visualization in analyzing the robot assembling accuracy, and studies the influence of spatial pose of robot assembly on the axis-hole assembly success rate, especially the robot teaching accuracy. Through the integration of the various errors and on the basis of the assembling accuracy, the tolerance of error source can be reasonably distributed to meet the requirement for assembling accuracy, and the planning of robot assembly unit can be improved.

Research on Virtual Assembly Technology Based on 3D Modeling Method

2010 ◽  
Vol 43 ◽  
pp. 641-646 ◽  
Author(s):  
Qian Yu
Keyword(s):  
Virtual Assembly ◽  
Modeling Method ◽  
Assembly Process ◽  
Mechanical Assembly ◽  
Virtual Technology ◽  
Support Mechanism ◽  
Feature Parameters ◽  
Technology Applications ◽  
Depth Study ◽  
Assembly Technology

Aiming at the current situation that there is lacking in-depth study on applications of virtual technology in mechanical manufacturing and assembly process control, the virtual assembly systems was researched and designed based on combining virtual reality technology with mechanical assembly process. The support mechanism of virtual assembly platform was designed based on taking shaft parts as example, and modeling method of 3D features parameters was adopted in order to build the model of virtual assembly parts, which was modeled according with the sequence as describing physical feature parameters of parts, building data structure of feature parameters and building model features library. On the basis of modeling virtual assembly platform, the key technologies of realizing the virtual assembly processing, which was from positioning issue and collision detection issue, were also analyzed, and control methods of virtual assembly processing were pointed out in detail. All is work is significative for enhancing the level of virtual technology applications, digital machinery manufacturing and assembly.

Representation of bolted joints in a structure using finite element modelling and model updating

2020 ◽  
Vol 14 (3) ◽  
pp. 7141-7151 ◽  
Author(s):  
R. Omar ◽  
M. N. Abdul Rani ◽  
M. A. Yunus
Keyword(s):  
Finite Element ◽  
Dynamic Behaviour ◽  
Model Updating ◽  
Complex Structure ◽  
Bolted Joints ◽  
Model Parameters ◽  
Fe Model ◽  
Bolted Joint ◽  
Fe Modelling ◽  
Joint Structure

Efficient and accurate finite element (FE) modelling of bolted joints is essential for increasing confidence in the investigation of structural vibrations. However, modelling of bolted joints for the investigation is often found to be very challenging. This paper proposes an appropriate FE representation of bolted joints for the prediction of the dynamic behaviour of a bolted joint structure. Two different FE models of the bolted joint structure with two different FE element connectors, which are CBEAM and CBUSH, representing the bolted joints are developed. Modal updating is used to correlate the two FE models with the experimental model. The dynamic behaviour of the two FE models is compared with experimental modal analysis to evaluate and determine the most appropriate FE model of the bolted joint structure. The comparison reveals that the CBUSH element connectors based FE model has a greater capability in representing the bolted joints with 86 percent accuracy and greater efficiency in updating the model parameters. The proposed modelling technique will be useful in the modelling of a complex structure with a large number of bolted joints.

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