A methodology for tuning the stiffness of machine tool supports is described based on a stiffness model using the contact stiffness approach. Using this model, the mathematical relationship between the load of the support and its stiffness is established. The relationship is separated into three regions. When the total stiffness of all supports is maximized, the load must be tuned so that the stiffness–support load relationship is in the critical region, whereby the contact stiffness is slightly larger than the bulk stiffness. Correspondingly, a placement method of supports is proposed that increases their stiffness without anchor bolts. The effectiveness of the proposed method is verified in two experiments. In the first experiment, the natural frequency of a small machine tool prototype is compared for several placements of three supports. The lowest natural frequency of the machine tool under the proposed placement scheme is maximized. In the second experiment, the proposed method is applied to increase the lowest natural frequency of a horizontal milling machine. The lowest natural frequency with a distinct arrangement of three supports is increased by 15–55%, compared to other popular placements of these three supports. The experimental results show that the proposed placement method is effective for enhancing the stiffness of machine tool supports.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A method for stiffness tuning of machine tool supports considering contact stiffness


    Contributors:


    Publication date :

    2015


    Size :

    10 Seiten, 20 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English







    METHODS AND APPARATUS FOR VARIABLE STIFFNESS SUPPORTS IN AIRCRAFT TESTING

    GRIFFIN STEVEN F / REICHENBACH ERIC Y | European Patent Office | 2024

    Free access

    Methods and apparatus for variable stiffness supports in aircraft testing

    GRIFFIN STEVEN F / REICHENBACH ERIC Y | European Patent Office | 2024

    Free access