0
Stiffness Evaluation: Collinear Stiffness Value Based Approach

Excerpt

Quality control of machines with heavy demands on accuracy and productivity, such as machine tools, coordinate measuring machines, and industrial robots includes stiffness testing as a regular stage [1, 2]. The testing methods are fixed in national and international standards, which quantitatively limit the minimal effective stiffness value. For example, the standard stiffness test for a universal lathe includes measuring radial and axial displacements of the main spindle caused by given active radial and axial force, respectively. For a given pair “force vs. linear displacement” or “torque vs. angle-of-rotation”, the stiffness value has a simple definition as the ratio of the absolute values of the force (torque) to the linear displacement (angle-of-rotation). The same approach presenting stiffness mapping [3] is regularly applied for stiffness control of the parallel kinematics machines (PKMs) such as hexapod-based and tripod-based machines [4–7].

4.1Introduction to stiffness assessment problem
4.2CSV-related definitions and formulations
4.3Evaluation of the minimal CSV
4.4Application to the 3-3 Gough-Stewart platform (GSP)
4.5Workspace of the machine satisfying stiffness limits
4.6CSV of the 5-axis machines
4.7CSV of articulated robots
4.8Conclusions
References
Topics: Stiffness

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In