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Research on the Application of Dynamic Property Analysis and Design for Machine Structure

Author: ZhangXianDong
Tutor: XuYanShen
School: Tianjin University
Course: Mechanical Manufacturing and Automation
Keywords: Machine Tool Design Modal analysis test Visible waviness Static and dynamic analysis Vibration suppression
CLC: TG502
Type: Master's thesis
Year: 2005
Downloads: 668
Quote: 13
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Abstract


In recent years, due to the improvement of the technical level of China's manufacturing industry, CNC machine tools has been widely used. CNC machine tools share increased year by year, the use of large and medium-sized enterprises have more SMEs and even individual enterprises generally use. Although China's CNC machine tool industry already has a certain amount of strength, but \In order to improve the machining accuracy and processing speed, it is necessary to make the machine structure itself has good static and dynamic performance. This thesis is based on the analysis of the static and dynamic machine tool structure principle, combined with several design examples the machine structure dynamic analysis and design methods. The main contents include: 1. Gantry mold machining center square ram parts, for example, study mechanical structure static and dynamic performance analysis and design methods. Using finite element analysis software Ansys other side ram structure variable analysis. The combination of square ram the structure and motion characteristics in the processing center, proposed several square ram structure improvement program, Ansys in static and modal analysis, comparing the results of its analysis, to make the final structure improvement program. Grinding workpiece surface for the Rifa digitized bearing outer ring trench visible waviness of a pilot study to diagnose the workpiece surface visible corrugated reasons. Measured by high-precision roundness measuring vibration test the Workpiece corrugated trial grinder air operation, as well as the impact of several parts of the grinder vibration test analysis of the dynamic performance of the grinding machine structure, and to draw the workpiece surface is visible ripple is due to the electro-spindle dynamic forced vibration caused by the imbalance caused by the grinding wheel spindle. 3 on test analysis a visible ripple workpiece causes, combined with the actual situation of the grinder, put forward vibration suppression measures on the grinder. Study the structure of the wheel spindle, grinding wheel access pole design a balanced of electric spindle eccentric quality dynamic balance device. The rotation of the wheel spindle in the simulation software MSC Visual Nastran dynamic simulation results show that the device is able to improve the force of the wheel spindle. Rifa Digital Superfinishing machine the idling vibration test and excitation modal testing, analysis by the Superfinishing in four kinematic Centrifugal force causes vibration of the vibration characteristics of the body, as The following structural improvements and design basis.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > General issues > Machine tool design, manufacture and maintenance
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