xp052505
Cholerny Spammer
Joined: 03 Aug 2010
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 Posted: Tue 9:32, 05 Apr 2011 Post subject: Processing center based on ANSYS Static and Dynami |
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XH715 processing center based on ANSYS Static and Dynamic Analysis
State analysis using a modal analysis to determine the structure of the natural frequencies and mode shapes, natural frequencies and modes of structural design for dynamic loads is an important parameter. Finite element model of the structure modal analysis, can be the natural frequency of vibration system (Naturalfrequency) and vibration (Vibrationshape). Machine tool structure is a continuum, quality and flexibility are continuously distributed, so should have an infinite number of degrees of freedom, which is infinite-order mode. However, the design of the machine maximum working speed 5000r/rain, so the role of the driving forces on the machine frequency is much higher than the possible frequency of the exciting force, the general resonance can not happen, not for the processing quality. Therefore, only low order modes of the machine. The original finite element model of machine tool for modal analysis, have the system before the 2O-order natural frequencies and mode shapes. Which can be clearly demonstrated the dynamic characteristics of machine tools is the first 1,2,3,4-order modes, if the modal superposition method to harmonic analysis or transient dynamic analysis, given the natural frequencies and mode shapes is also necessary. Due to limited space only the first 4 shows the vibration pattern map shown in Figure 3. Table 2 lists the whole structure of the first 4 natural frequencies and mode shapes description. 28 Table 2 whole structure of the first 4 natural frequencies and mode shapes description of these vibration modes greatest impact on the dynamic performance of machine and processing machine in the actual performance of the main dynamic characteristics of its decision. Combined with modal analysis, how to design an appropriate increase in the x and Y to the column stiffness, torsional rigidity and bending stiffness, reducing the deformation of the machine under dynamic cutting force is to further improve the dynamic performance of the key tools .... 3 Conclusion 1) using ANSYS finite element analysis software can save both human and material resources, but also higher simulation accuracy, the dynamic design is very important tool. 2) vertical machining center by XH715 static and dynamic analysis, dynamic swing machine column and torsional deformations that affect the dynamic performance of machine tool main factors. Machine processing it will significantly affect the quality. 3) column and the base of the machine tool dynamic properties that affect the weak link. Through the column and the improvement of structural parameters of the base, can effectively improve the dynamic performance of machine tools. 4) In this paper, finite element modeling, interface features not fully considered, but coupled with the joint surface, further analysis can be used in combination with other treatment methods at the surface to make the model closer to reality. [
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