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Structural optimization of high-speed presses and vibration control

Author: ZhanJunYong
Tutor: GaoJianHe
School: Yangzhou University
Course: Mechanical Design and Theory
Keywords: High speed press Dynamic balance Dynamic Simulation Finite Element Vibration Control
CLC: TG305
Type: Master's thesis
Year: 2010
Downloads: 261
Quote: 2
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Abstract


When a high-speed presses work without artificial feed, raw materials or semi-automatically sent to die for processing with efficient automatic, high precision characteristics, which has been more widely used. Compared with ordinary press speed presses on the design, manufacture, have higher requirements, not only have a good static strength properties (i.e., stiffness), and the dynamic performance of the device has also become important component of its overall performance, so The traditional static design and experience design has not fully meet the engineering requirements of high-speed presses. If the structural design is unreasonable, the significant noise and vibration will occur, seriously affecting the working efficiency of the press, the machining precision and the life of the mold. Slider-crank mechanism is the executive body of the press, when the presses, high-speed operation, the slider-crank mechanism when in motion unbalanced force of inertia, the inertial force through the crank the role of the camera body, the machines and support machines ground vibration. This subject on the basis of the split research and analysis of high-speed precision press, focusing on the vibration caused by the inertia force study, this paper aims to the inertial force control on high-speed presses, in order to achieve effective control of vibration of high-speed presses. On this basis, the traditional high-speed presses to improve the design of a new high-speed presses modal optimize the dynamic response analysis, vibration test and production prototype for the press to further optimize the design and damping isolator designed to provide a theoretical basis and practical reference model. The major contents of study: (1) the establishment of a mechanical model of the slider-crank mechanism, slider-crank mechanism kinematics and dynamics analysis using analytical method, which obtained the equivalent inertia force and its role in the fuselage changes in the law. (2) First, according to the laws of inertial force on high-speed presses, dynamic balancing device design slider-crank mechanism; Secondly, to establish a high-speed presses the implementing agencies with SolidWorks 3D CAD software and multi-body dynamics analysis software COSMOS / Motion multi rigid body kinetic model, the institution of the kinematics and dynamics simulation analysis. (3) the use of SolidWorks software model of a high-speed presses, determine the equivalent kinetic parameters of the machine combined with the Ministry of the establishment of a high-speed presses finite element model, and its modal analysis in accordance with the actual conditions , drawn to its natural frequency with the corresponding mode shapes. (4) based on modal analysis, based on the structural characteristics of the high-speed presses, the size of the body portion of the high-speed presses the design parameters of the objective function minimum mass of the body first natural frequency of the body to the constraints variables, body part size optimization variables, Simulation software to optimize the high-speed press frame. (5) high-speed presses, dynamic analysis, impact load, using modal superposition dynamic response of a typical process has been calculated, the stress field and displacement field in the work cycle of high-speed presses, verify optimization programs. (6) presses machine mode test test, and from test data to identify the structure of the modal parameters, by comparison with the results of the modal analysis, and further verify the correctness of the finite element model of the presses.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > General issues > Pressure processing equipment
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