---
_id: '9972'
abstract:
- lang: eng
  text: The transportation of dry fine powders is an emerging technologic task, as
    in biotechnology, pharmaceu-tical and coatings industry the particle sizes of
    processed powders get smaller and smaller. Fine powdersare primarily defined by
    the fact that adhesive and cohesive forces outweigh the weight forces, leadingto
    mostly unwanted agglomeration (clumping) and adhesion to surfaces. Thereby it
    gets more difficult touse conventional conveyor systems (e.g. pneumatic or vibratory
    conveyors) for transport. A rather newmethod for transporting these fine powders
    is based on ultrasonic vibrations, which are used to reducefriction between powder
    and substrate. Within this contribution an experimental set-up consisting of apipe,
    a solenoid actuator for axial vibration and an annular piezoelectric actuator
    for the high frequencyradial vibration of the pipe is described. Since amplitudes
    of the radial pipe vibration should be as large aspossible to get high effects
    of friction reduction, the pipe is excited to vibrate in resonance. To determinethe
    optimum excitation frequency and actuator position the vibration modes and resonance
    frequenciesof the pipe are calculated and measured. Results are in good accordance.
author:
- first_name: Paul
  full_name: Dunst, Paul
  id: '22130'
  last_name: Dunst
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Dunst P, Hemsel T, Sextro W. Analysis of pipe vibration in an ultrasonic powder
    transportationsystem. <i>elsevier</i>. 2017;Sensors and Actuators A 263:733-736.
  apa: Dunst, P., Hemsel, T., &#38; Sextro, W. (2017). Analysis of pipe vibration
    in an ultrasonic powder transportationsystem. <i>Elsevier</i>, <i>Sensors and
    Actuators A 263</i>, 733–736.
  bibtex: '@article{Dunst_Hemsel_Sextro_2017, title={Analysis of pipe vibration in
    an ultrasonic powder transportationsystem}, volume={Sensors and Actuators A 263},
    journal={elsevier}, author={Dunst, Paul and Hemsel, Tobias and Sextro, Walter},
    year={2017}, pages={733–736} }'
  chicago: 'Dunst, Paul, Tobias Hemsel, and Walter Sextro. “Analysis of Pipe Vibration
    in an Ultrasonic Powder Transportationsystem.” <i>Elsevier</i> Sensors and Actuators
    A 263 (2017): 733–36.'
  ieee: P. Dunst, T. Hemsel, and W. Sextro, “Analysis of pipe vibration in an ultrasonic
    powder transportationsystem,” <i>elsevier</i>, vol. Sensors and Actuators A 263,
    pp. 733–736, 2017.
  mla: Dunst, Paul, et al. “Analysis of Pipe Vibration in an Ultrasonic Powder Transportationsystem.”
    <i>Elsevier</i>, vol. Sensors and Actuators A 263, 2017, pp. 733–36.
  short: P. Dunst, T. Hemsel, W. Sextro, Elsevier Sensors and Actuators A 263 (2017)
    733–736.
date_created: 2019-05-27T09:31:13Z
date_updated: 2019-09-16T10:23:40Z
department:
- _id: '151'
keyword:
- Powder transport Piezoelectrics Ultrasonics Pipe vibration Finite element simulation
  Fine powder
language:
- iso: eng
page: 733-736
publication: elsevier
quality_controlled: '1'
status: public
title: Analysis of pipe vibration in an ultrasonic powder transportationsystem
type: journal_article
user_id: '55222'
volume: Sensors and Actuators A 263
year: '2017'
...
---
_id: '9955'
abstract:
- lang: eng
  text: Wire bonding has been an established packaging technology for decades. When
    introducing copper as wire material for high power applications, adaptations to
    the bonding process and to machines became necessary. Here, challenges occur due
    to the stiffer wire material and changing oxide layers on the contact partners.
    To achieve sufficient process stability, a clean bond area is required, which
    can only be achieved with high shear stresses in the contact partners surfaces.
    These necessitate high normal forces to plastically deform the wire and substrate.
    To achieve such high stresses in the contact area, the bonding tool needs to be
    able to transmit the needed tangential forces to the top side of the wire. The
    wire itself performs a shear movement and transmits the force into the contact
    area to clean the contaminant and oxide layers and to level the desired bond surfaces.
    The main function of the tool is to transmit these forces. If the bond tool can
    only transmit low forces in the direction of excitation, the parameter space for
    a stable bond process is severely restricted. Here, a modeling approach to estimate
    how well different tool shapes meet the demand of transmitting high tangential
    forces is presented. The model depends on wire deformation and thus on the ultrasonic
    softening effect.
author:
- first_name: Simon
  full_name: Althoff, Simon
  last_name: Althoff
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Andreas
  full_name: Unger, Andreas
  last_name: Unger
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Florian
  full_name: Eacock, Florian
  last_name: Eacock
citation:
  ama: 'Althoff S, Meyer T, Unger A, Sextro W, Eacock F. Shape-Dependent Transmittable
    Tangential Force of Wire Bond Tools. In: <i>IEEE 66th Electronic Components and
    Technology Conference</i>. ; 2016:2103-2110. doi:<a href="https://doi.org/10.1109/ECTC.2016.234">10.1109/ECTC.2016.234</a>'
  apa: Althoff, S., Meyer, T., Unger, A., Sextro, W., &#38; Eacock, F. (2016). Shape-Dependent
    Transmittable Tangential Force of Wire Bond Tools. In <i>IEEE 66th Electronic
    Components and Technology Conference</i> (pp. 2103–2110). <a href="https://doi.org/10.1109/ECTC.2016.234">https://doi.org/10.1109/ECTC.2016.234</a>
  bibtex: '@inproceedings{Althoff_Meyer_Unger_Sextro_Eacock_2016, title={Shape-Dependent
    Transmittable Tangential Force of Wire Bond Tools}, DOI={<a href="https://doi.org/10.1109/ECTC.2016.234">10.1109/ECTC.2016.234</a>},
    booktitle={IEEE 66th Electronic Components and Technology Conference}, author={Althoff,
    Simon and Meyer, Tobias and Unger, Andreas and Sextro, Walter and Eacock, Florian},
    year={2016}, pages={2103–2110} }'
  chicago: Althoff, Simon, Tobias Meyer, Andreas Unger, Walter Sextro, and Florian
    Eacock. “Shape-Dependent Transmittable Tangential Force of Wire Bond Tools.” In
    <i>IEEE 66th Electronic Components and Technology Conference</i>, 2103–10, 2016.
    <a href="https://doi.org/10.1109/ECTC.2016.234">https://doi.org/10.1109/ECTC.2016.234</a>.
  ieee: S. Althoff, T. Meyer, A. Unger, W. Sextro, and F. Eacock, “Shape-Dependent
    Transmittable Tangential Force of Wire Bond Tools,” in <i>IEEE 66th Electronic
    Components and Technology Conference</i>, 2016, pp. 2103–2110.
  mla: Althoff, Simon, et al. “Shape-Dependent Transmittable Tangential Force of Wire
    Bond Tools.” <i>IEEE 66th Electronic Components and Technology Conference</i>,
    2016, pp. 2103–10, doi:<a href="https://doi.org/10.1109/ECTC.2016.234">10.1109/ECTC.2016.234</a>.
  short: 'S. Althoff, T. Meyer, A. Unger, W. Sextro, F. Eacock, in: IEEE 66th Electronic
    Components and Technology Conference, 2016, pp. 2103–2110.'
date_created: 2019-05-27T08:47:52Z
date_updated: 2020-05-07T05:33:52Z
department:
- _id: '151'
doi: 10.1109/ECTC.2016.234
keyword:
- finite element simulation
- wire bonding
- tool geometry
language:
- iso: eng
page: 2103-2110
project:
- _id: '92'
  grant_number: 02 PQ2210
  name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: IEEE 66th Electronic Components and Technology Conference
quality_controlled: '1'
status: public
title: Shape-Dependent Transmittable Tangential Force of Wire Bond Tools
type: conference
user_id: '210'
year: '2016'
...
---
_id: '34442'
abstract:
- lang: eng
  text: Radial shaft seals are used in a variety of applications, where rotating shafts
    in steady housings have to be sealed. Typical examples are crankshafts, camshafts,
    differential gear or hydraulic pumps. In the operating state the elastomeric seal
    ring and the shaft are separated by a lubrication film of just a few micrometers.
    Due to shear strain and fluid friction the contact area is subject to a higher
    temperature than the rest of the seal ring. The stiffness of the elastomeric material
    is intensely influenced by this temperature and thus contact pressure, friction
    and wear also strongly depend on the contact temperature. In order to simulate
    the contact behavior of elastomer seal rings it is essential to use a comprehensive
    approach which takes into consideration the interaction of temperature, friction
    and wear. Based on this idea a macroscopic simulation model has been developed
    at the MEGT. It combines a finite element approach for the simulation of contact
    pressure at different wear states, a semi-analytical approach for the calculation
    of contact temperature and an empirical approach for the calculation of friction.
    In this paper the model setup is presented, as well as simulation and experimental
    results.
author:
- first_name: D.
  full_name: Frölich, D.
  last_name: Frölich
- first_name: Balázs
  full_name: Magyar, Balázs
  id: '97759'
  last_name: Magyar
- first_name: B.
  full_name: Sauer, B.
  last_name: Sauer
citation:
  ama: Frölich D, Magyar B, Sauer B. A comprehensive model of wear, friction and contact
    temperature in radial shaft seals. <i>Wear</i>. 2014;311(1):71-80. doi:<a href="https://doi.org/10.1016/j.wear.2013.12.030">https://doi.org/10.1016/j.wear.2013.12.030</a>
  apa: Frölich, D., Magyar, B., &#38; Sauer, B. (2014). A comprehensive model of wear,
    friction and contact temperature in radial shaft seals. <i>Wear</i>, <i>311</i>(1),
    71–80. <a href="https://doi.org/10.1016/j.wear.2013.12.030">https://doi.org/10.1016/j.wear.2013.12.030</a>
  bibtex: '@article{Frölich_Magyar_Sauer_2014, title={A comprehensive model of wear,
    friction and contact temperature in radial shaft seals}, volume={311}, DOI={<a
    href="https://doi.org/10.1016/j.wear.2013.12.030">https://doi.org/10.1016/j.wear.2013.12.030</a>},
    number={1}, journal={Wear}, author={Frölich, D. and Magyar, Balázs and Sauer,
    B.}, year={2014}, pages={71–80} }'
  chicago: 'Frölich, D., Balázs Magyar, and B. Sauer. “A Comprehensive Model of Wear,
    Friction and Contact Temperature in Radial Shaft Seals.” <i>Wear</i> 311, no.
    1 (2014): 71–80. <a href="https://doi.org/10.1016/j.wear.2013.12.030">https://doi.org/10.1016/j.wear.2013.12.030</a>.'
  ieee: 'D. Frölich, B. Magyar, and B. Sauer, “A comprehensive model of wear, friction
    and contact temperature in radial shaft seals,” <i>Wear</i>, vol. 311, no. 1,
    pp. 71–80, 2014, doi: <a href="https://doi.org/10.1016/j.wear.2013.12.030">https://doi.org/10.1016/j.wear.2013.12.030</a>.'
  mla: Frölich, D., et al. “A Comprehensive Model of Wear, Friction and Contact Temperature
    in Radial Shaft Seals.” <i>Wear</i>, vol. 311, no. 1, 2014, pp. 71–80, doi:<a
    href="https://doi.org/10.1016/j.wear.2013.12.030">https://doi.org/10.1016/j.wear.2013.12.030</a>.
  short: D. Frölich, B. Magyar, B. Sauer, Wear 311 (2014) 71–80.
date_created: 2022-12-15T10:19:37Z
date_updated: 2022-12-15T10:20:39Z
department:
- _id: '146'
doi: https://doi.org/10.1016/j.wear.2013.12.030
extern: '1'
intvolume: '       311'
issue: '1'
keyword:
- Radial shaft seal ring
- Contact temperature
- Wear
- Friction torque
- Finite element simulation
language:
- iso: eng
page: 71-80
publication: Wear
publication_identifier:
  issn:
  - 0043-1648
status: public
title: A comprehensive model of wear, friction and contact temperature in radial shaft
  seals
type: journal_article
user_id: '38077'
volume: 311
year: '2014'
...