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The Research on Mechanism of Vibration Rolling and Application Technology

Author: GaoJiaYi
Tutor: WenDianYing
School: Tianjin University of Technology
Course: Mechanical Design and Theory
Keywords: Seamless steel pipe Vibration rolling Mechanical model Contact stiffness Contact friction Stability
CLC: TG335.71
Type: Master's thesis
Year: 2010
Downloads: 73
Quote: 2
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Abstract


By a method for adding alloying elements in the carbon steel can be improved mechanical properties and performance of a seamless steel pipe, but adding an alloy element also increases the production cost of the product, and the deterioration of the cycle performance of the steel. The theoretical study and experiments show that using low-temperature, high-speed, large deformation, rolling means metal grain refinement and phase transformation strengthening, to fully enhance the mechanical properties of metallic materials, but this method will produce a lot of rolling deformation resistance corresponding requirement to increase the driving force of the rolling equipment, which gives the ultra grain refinement of existing equipment rolling seamless steel pipe raised new issues. Seamless steel pipe features, with the the vibration experience of the successful use of technology in turning, drilling, grinding, boring, stretching machining, the vibration the rolling technology into seamless steel pipe rolling processing, integrated application of vibration theory, the elastic-plastic theory, the theory of plastic deformation of metals, contact mechanics and numerical calculation method, combined with other means of analytical methods and computer simulation technology, a more comprehensive study of seamless steel pipe vibration rolling for the first time, the research work The main content and the results taken: 1. elastic-plastic theory and the theory of plastic deformation of metals resolution rolling mill rolling deformation zone stress and strain relations, based on the contact mechanics contact stiffness and contact friction material recovery force environment under coefficients, to create a mechanical model of the tandem mill vibration rolling; 2 on the basis of the analysis of the vibration rolling theory, the establishment of a vibration having a periodic contact and separation condition of the rolls and pipe rolling seamless steel pipe rolling process model is derived rolling mill vibration rolling differential equations quantitatively describe the vibration rolling process; 3. the research roll and pipe vibration rolling process in the contact area and friction coefficient changes, the establishment of elastoplastic contact non-linear system vibration equation expression of sexual items, singularity and stability of contact with non-linear system, the establishment of a system of elastic-plastic contact structure vibration equation; 4. solving the steady-state response and the amplitude and frequency of the rolling mill vibration rolling characteristics, to optimize rolling mill vibration rolling vibration parameters, parse the rolling mill in the steady-state response under excitation to determine the vibration rolling to improve the relative friction and contact between the roll and capillary conditions, lower metal deformation resistance, for the development of higher provide the conditions for the performance of seamless steel tubes, to procure seamless steel pipe rolling equipment technology upgrade.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling process > Pipe rolling > Seamless steel pipe rolling
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