Application of Alternative Support Fixture System in Vibration Suppression of Thin-Walled Parts

2021 ◽  
Author(s):  
Ze Liu ◽  
Yu Sun ◽  
Yu Wang
Keyword(s):  
Vibration Suppression ◽  
Thin Walled ◽  
Fixture System

Application of Alternative Support Fixture System in Vibration Suppression of Thin-Walled Parts

2020 ◽  
Author(s):  
Ze Liu ◽  
Yu Sun ◽  
Yu Wang
Keyword(s):  
Dynamic Model ◽  
Thin Plate ◽  
Vibration Suppression ◽  
Stiffness Coefficient ◽  
System A ◽  
Workpiece Vibration ◽  
Thin Walled ◽  
Fixture System ◽  
New System

Abstract The machining vibration of thin-walled parts affects the quality of the products. Thus, this paper proposes a new alternative support fixture system for vibration suppression of thin-walled parts. The system includes two movable supporting heads, which are periodically repositioned along the machining path in the form of alternating support to support the area close to the cutter, so as to improve the rigidity of the actual machining position of the thin-walled part. Around this new system, a dynamic model is established to analyze the workpiece vibration. Takeing as an example simply suppoted thin-plate, the influence of the supporting head’s location, stiffness coefficient and damping coefficient on vibration suppression are numerically analyzed in this paper. The result of the simulation demonstrates the alternative support fixture system is effective in vibration suppression of thin-walled parts.

Research on Motion Control System of Clamping Thin-Walled Tube Based on PID Neural Network

2013 ◽  
Vol 579-580 ◽  
pp. 670-674
Author(s):  
Chu Xiong Xie ◽  
Chun Fu Gao ◽  
Xin Sheng He ◽  
Zuo Cai Dai
Keyword(s):  
Neural Network ◽  
Control System ◽  
Fast Response ◽  
Thin Walled Tube ◽  
Self Tuning ◽  
System Requirements ◽  
Thin Walled ◽  
Fixture System ◽  
Pid Neural Network ◽  
Non Destructive

As for the shortcomings of poor rigidity and strength of weak of thin-walled tube parts, a device of an adaptive PID controller which based on neural network has been proposed by regarding the thin-walled tube fixture system as the research object. The controller which integrates the characteristics of neural network and PID regulator can realize the self-tuning of PID parameters effectively and make the control system equip with the feature of fast response, small overshoot and strong robustness etc. Simulation results show that the controller can meet the system requirements commendably and it can implement the automatic chucking control of the thin-walled steel cutting process with fast and non-destructive in the experimental prototype.

Influence of Contact Positioning of Pivot Support on Machining Vibration

2021 ◽  
Author(s):  
Kotaro Mori ◽  
Iwao Yamaji ◽  
Daisuke Kono ◽  
Atsushi Matsubara ◽  
Takehiro Ishida ◽  
...  
Keyword(s):  
Rigid Body ◽  
Flat Plate ◽  
Vibration Suppression ◽  
Suppression Effect ◽  
Damping Effect ◽  
Machining Test ◽  
Cylindrical Workpiece ◽  
Support Mechanisms ◽  
Thin Walled ◽  
Body Support

Abstract The authors have studied support mechanisms for the machining of thin-walled workpieces. Previous studies have shown that the newly proposed pivot support has a vibration suppression effect on flat plate workpieces. This report clarifies the guideline for determining the placement interval for deploying this support on a cylindrical workpiece. Also, a machining test was conducted to compare the damping effect of pivot support with that of conventional rigid body support. As a result, it was found that the pivot support has an equivalent vibration suppression effect as the conventional support has. By using the proposed support, installation can be simplified while maintaining the damping effect.

Nonlinear Control of Flexural–Torsional Vibrations of a Rotating Thin-Walled Composite Beam

2017 ◽  
Vol 17 (05) ◽  
pp. 1740003 ◽  
Author(s):  
Jerzy Warminski ◽  
Jarosław Latalski
Keyword(s):  
Nonlinear Control ◽  
Control Strategy ◽  
Vibration Suppression ◽  
Flexible Beam ◽  
Warping Function ◽  
Saturation Control ◽  
Rotating Speed ◽  
Parametric Studies ◽  
Thin Walled ◽  
Transportation Motion

In this paper, the effectiveness of a saturation control strategy in suppressing vibration of a rotating composite thin walled beam is studied. The mathematical model of the flexible beam takes into account a shear deformation effect, a warping function, a centrifugal force and the Coriolis acceleration. To extend the generality of the proposed formulation an inertia of the hub is also considered. Adaptive capability of the beam is achieved through the implementation of the saturation control algorithm. Within the performed tests, the discussed control strategy is applied for different magnitudes of flexural–torsional vibration modes resulting from different orientations of beam laminate-reinforcing fiber’s. The obtained results prove the applied nonlinear control to be the effective method for beam vibration suppression in near-by resonance zones for all studied cases. Parametric studies considered different rotating speeds of the system. It is shown that the vibration of the beam can be suppressed to similar levels independently of the transportation motion rotating speed. However, significant differences in the width of vibration suppression zones are observed.

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