Optimization method of tuned mass damper of elastic support dry friction

A technology of tuning mass damping and elastic support, which is applied in the field of machinery, can solve problems such as noise pollution, lower product quality, production efficiency, tool and machine tool life, and affect the physical and mental health of operators, and achieve good cutting stability.

Inactive Publication Date: 2010-09-15
BEIJING UNIV OF TECH
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Problems solved by technology

Cutting chatter reduces product quality, production efficiency, service life of tools and machine ...

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  • Optimization method of tuned mass damper of elastic support dry friction
  • Optimization method of tuned mass damper of elastic support dry friction
  • Optimization method of tuned mass damper of elastic support dry friction

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Embodiment Construction

[0021] Combine below Figure 1 ~ Figure 3 The optimization method of elastically supported dry friction tuned mass damper as a tuned mass damper with an elastically supported dry friction damper in series is introduced.

[0022] first as figure 1 As shown in , the dynamic model of the cutting system with elastic support series dry friction tuned mass damper is established, and the cutting process system is modeled as a single-degree-of-freedom dynamic system, F d is the dynamic cutting force, x s is the vibration displacement of the controlled cutting system, x d is the vibration displacement of the damper vibrator.

[0023] In the figure, the main dynamic parameter of the damper is the vibrator mass (m d ), stiffness (k d ), damping coefficient (c d ), elastic support stiffness (k f ) and friction damper friction (F f ), the damper natural frequency f d =(k d / m d )^ 0.5 , the damping ratio (ξ d ) = c d / 2 / (m d k d )^ 0.5 .

[0024] In the figure, the main d...

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Abstract

The invention relates to an optimal design method for a tuned mass damper of elastic support dry friction for controlling cutting vibration, relating to an optimization method of structural parameters for inhibiting a cutting vibration processing damper. The invention, aiming at an elastic support serial dry friction damper, provides the optimization method of structural parameters thereof, comprising the following steps of: firstly, acquiring the primary module state mass, the rigidity and the damping coefficient in a weak loop of a controlled cutting system through the module state testing technology; then establishing module dynamically for the cutting system additionally provided with the tuned mass damper of elastic support dry friction and acquiring the frequency responding function of the controlled cutting system through the numerical calculation method; and finally, carrying out the optimal design by adopting the numerical optimization method, and taking maximum negative real part of the frequency responding function of the controlled cutting system as the optimal object and fixed frequency, elastic support rigidity of the tuned mass damper of elastic support dry friction as the optimal parameters of the damper. The optimum design can exert two energy consumption abilities of friction damping and oscillator vibration at the same time to maximum extend so that the cutting stability is optimized.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a damper structural parameter optimization method for suppressing cutting vibration. Background technique [0002] Machining chatter is a self-excited vibration, which is a very strong relative vibration between the tool and the workpiece generated by the metal cutting machine tool during the cutting process. Cutting chatter reduces product quality, production efficiency, service life of cutting tools and machine tools, and at the same time causes noise pollution, affecting the physical and mental health of operators. With the development of factory automation, the operator is increasingly far away from the processing site, and the method of chatter prevention and control often cannot fundamentally eliminate the occurrence of chatter, so the task of online monitoring and control of cutting chatter has become more and more urgent , becomes more and more meaningful. [0003] The ...

Claims

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Application Information

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IPC IPC(8): F16F15/02
Inventor 王民昝涛
Owner BEIJING UNIV OF TECH
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