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Now showing items 41-50 of 150
Bobbin stresses generated by wire winding
(Oklahoma State University, 1991-05)
The prediction of bobbin stresses generated by wire winding is now possible by combining a finite element structural code and a rigid body motion code. In this combination of computer codes, the bobbin and the individual ...
Stress field in a web during slitting-opening mode
(Oklahoma State University, 1999-06)
The dynamic stress field in a web during slitting is presented for the opening mode appropriate for razor slitting in the steady state. The integral equations for the general stress and strain fields in a web near a razor ...
Limitations to sensing of web tension by means of roller reaction forces
(Oklahoma State University, 1999-06)
Classical frequency response analysis of a dancer or a roller mounted on load cells reveals that such devices are severely limited in their ability to sense the dynamic tension in a web. The response of a tension control ...
Theoretical comparison of winding tension control methods
(Oklahoma State University, 1999-06)
Several methods are used to control tension in the winding zone. The two most common methods use either a tension signal from a loadcell or a position signal from a dancer system. Both techniques control tension, however, ...
Theoretical analysis of shear slitting of paper on the basis of a three-dimensional material law
(Oklahoma State University, 1999-06)
The slitting and cross cutting as one of the substantial manufacturing methods in paper equipment and paper processing, are characterized in many applications by practice problems, which lead to productivity and quality losses.
Film surface considerations for enhanced winding of thin films
(Oklahoma State University, 1997-06)
The primary defect for thin films ( < 25μm ) consists of sinusoidal ridges that run around the wound roll of film. Previous work has shown that these defects are buckles caused by compressive stresses in the transverse ...
Systems approach to reducing winding defects at Alcoa-Warrick operations
(Oklahoma State University, 1997-06)
When processing coated aluminum, coil winding defects can be a major detractor to recovery, flowtime, and customer satisfaction goals for coil coating and slitting operations. Over the past several years, extensive studies ...
Using FSRs to measure radial pressure in wound rolls
(Oklahoma State University, 1991-05)
The Force Sensing Resistor (FSRTM)1 is a device which changes resistance in a predictable manner with the application of force on its surface.[1] The FSR has been used in a variety of applications since its invention in ...
Advanced winding machine development at Sandia National Laboratories
(Oklahoma State University, 1993-06)
Sandia National Labs, New Mexico is designing and testing an improved version of its state-of-the-art capacitor winding machine. The new CL1610 winding machine is based on the mechanical design of three previous Sandia ...
Effect of speed loop bandwidths and line-speed on system eigenvalues in multi-span web transport systems
(Oklahoma State University, 1997-06)
Web transport systems are composed of multiple tension zones. These zones are separated by driven rolls such as calenders, bridles or nipped rolls whose speed is regulated by a closed loop controller. Given that tension ...