Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(cam roller). Showing records 1 – 3 of 3 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


NSYSU

1. Tsai, Payee. Design of Rotary Tables Using Roller Gear Cam Mechanisms.

Degree: Master, Mechanical Engineering, 2000, NSYSU

Rotary tables are generally regarded as the forth axis of machining tools. Traditionally, gear sets are used as reducers in the rotary tables. In order to improve the positioning accuracy, load and efficiency of rotary tables, a rotary table which applies the roller gear cam reducer is proposed. From the deduction of the theory, applications of roller gear cam reducers in the industries can be achieved. This thesis is focused on developing the procedure as follows: Firstly, the type of roller gear cam reducer and design parameters are identified. Secondly, the mechanical characteristics of the device are analyzed. Finally, a rotary table is designed and implemented to investigate the performance of the of the roller gear cam rotary table. Advisors/Committee Members: Bor Jeng Lin (chair), Der-Min Tsay (committee member), Jao-Hwa Kuang (chair).

Subjects/Keywords: Efficiency; Positioning accuracy; Rotary table; Roller gear cam reducer

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tsai, P. (2000). Design of Rotary Tables Using Roller Gear Cam Mechanisms. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527100-010110

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Tsai, Payee. “Design of Rotary Tables Using Roller Gear Cam Mechanisms.” 2000. Thesis, NSYSU. Accessed September 19, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527100-010110.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Tsai, Payee. “Design of Rotary Tables Using Roller Gear Cam Mechanisms.” 2000. Web. 19 Sep 2020.

Vancouver:

Tsai P. Design of Rotary Tables Using Roller Gear Cam Mechanisms. [Internet] [Thesis]. NSYSU; 2000. [cited 2020 Sep 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527100-010110.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tsai P. Design of Rotary Tables Using Roller Gear Cam Mechanisms. [Thesis]. NSYSU; 2000. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527100-010110

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


NSYSU

2. Hu, Chin-Che. A Study on the dynamic Behavior of the Roller Gear Cam System Using Different Torque Compensation Mechanisms.

Degree: Master, Mechanical Engineering, 2001, NSYSU

Roller Gear Cam mechanismï¼RGCï¼has been used widely in different automation mechanisms and all kinds of orientation mechanism. High speed and high accuracy of the RGC system is a tendency in high production automation. The interaction between the driving speed and torque of a high speed RGC system is investigated in this work. The effect of adding a torque compensation camï¼TCCï¼on the improving of indexing precision of a RGC system is investigated in this thesis. The dynamic responses of a RGC system driven by a DC motor are conducted. Dynamic equations of the intermittent- motion of a RGC driven system are derived by using the Lagrangeâs equation with the assumption of dual-stiffness. Furthermore, the effect of adding a torque compensation mechanismï¼TCMï¼ such as torque compensation camï¼TCCï¼ or idle wheel on the improving of indexing precision of a RGC system is investigated in this work. The sixth order Runge-Kutta iteration method is employed in the systemâs responses simulation. Variations of the driving torque, driving speed and residual vibration of a RGC system with different torque compensation devices are analyzed in this research. The simulated and measured results indicate that a RGC system attached with a TCC can improve its speed and torque fluctuation at the designed speed significantly. However, this compensation effect is quite sensitive to the driving speed. On the contrary, the compensation effect introduced by using an idle wheel is not so sensitive to the speed as the TCC does. The low cost and easy design are also the favorable factors for using an idle wheel to instead of an expensive TCC device. Advisors/Committee Members: Der-Min Tsay (chair), Ying-Chien Tsai (chair), Jao-Hwa Kuang (committee member).

Subjects/Keywords: torque compensation mechanism; roller gear cam system

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hu, C. (2001). A Study on the dynamic Behavior of the Roller Gear Cam System Using Different Torque Compensation Mechanisms. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701101-002537

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Hu, Chin-Che. “A Study on the dynamic Behavior of the Roller Gear Cam System Using Different Torque Compensation Mechanisms.” 2001. Thesis, NSYSU. Accessed September 19, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701101-002537.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Hu, Chin-Che. “A Study on the dynamic Behavior of the Roller Gear Cam System Using Different Torque Compensation Mechanisms.” 2001. Web. 19 Sep 2020.

Vancouver:

Hu C. A Study on the dynamic Behavior of the Roller Gear Cam System Using Different Torque Compensation Mechanisms. [Internet] [Thesis]. NSYSU; 2001. [cited 2020 Sep 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701101-002537.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hu C. A Study on the dynamic Behavior of the Roller Gear Cam System Using Different Torque Compensation Mechanisms. [Thesis]. NSYSU; 2001. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701101-002537

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. Alakhramsing, Shivam Sharwien. Towards a fundamental understanding of the tribological behaviour of cam-roller follower contacts.

Degree: 2019, University of Twente

Cam-roller followers are part of the valve train mechanisms found in internal combustion engines. Valve train friction losses may contribute up to 10% of the total engine friction losses. The lubricated cam-roller follower unit consists of two lubricated contacts, namely the cam-roller contact and roller-pin contact. While the former is a non-conformal contact, the latter is a conformal contact. The traction induced by the cam-roller contact drives the roller. It is important to study friction between the cam and roller as it influences the engine efficiency and the onset of wear – and thus ultimately lifetime – of components. Understanding lubrication conditions in the cam-roller contact is complicated due to transient variations of the geometry, force and friction in the roller-pin contact. A very important variable, affecting the cam-roller lubrication performance, is the frictional force (which resists the motion of the roller) at the roller-pin contact. The lubricated cam-roller contact studied in this thesis is highly loaded with contact forces up to 16 kN. Important lubrication performance indicators of the cam-roller contact are the pressure, film thickness and frictional force. This thesis focuses on the factors influencing the aforementioned lubrication performance indicators. Relying on the aforementioned, the factors studied in this work are: •The influence of axial shape of the roller: The axial shape of the roller and its influence on the generated film thickness, pressure and friction in the cam-roller contact. This was done by means of a smooth surface finite element method (FEM)-based finite line contact elastohydrodynamic lubrication (EHL) model. The model shows the effects of parameters describing the axial shape of the roller, velocity, load and material properties on the lubrication performance indicators. •The influence of elastic deformation in the roller-pin contact: In order to better quantify the friction, film thickness and pressure in the roller-pin contact a similar smooth surface FEM-based EHL model was developed for the roller-pin contact. The model demonstrates the importance of allowing for elastic deformation of the conformal roller-pin contact and its effect on film thickness, pressure and friction coefficient. •The influence of roller-pin contact friction in the high slide-to-roll ratio (SRR) domain of the cam-roller contact: At increasing levels of friction in the roller-pin contact the amount of sliding at the cam-roller contact increases, in turn affecting the film thickness, pressure and cam-roller contact friction coefficient. In order to analyse the effects of higher values of roller-pin friction coefficient on the cam-roller lubrication performance, an infinite line contact mixed-thermo-elastohydrodynamic (TEHL) model was developed for the cam-roller contact. The mixed-lubrication model is based on the load-sharing concept and uses real surface roughness measurement data as input. The complete model is based on a smooth surface FEM-based EHL line contact model and a boundary… Advisors/Committee Members: de Rooij, Matthias B., Schipper, Dirk J..

Subjects/Keywords: Elastohydrodynamic lubrication; cam-roller; roller-pin; mixed-lubrication; roller slip; asperity contact; Friction; Stick-slip; slide-to-roll ratio; Finite Element Analysis; thermohydrodynamic; thermo-elastohydrodynamic; Finite line contacts; logarithmic rollers; coating

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Alakhramsing, S. S. (2019). Towards a fundamental understanding of the tribological behaviour of cam-roller follower contacts. (Doctoral Dissertation). University of Twente. Retrieved from https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; 3ea78a51-f232-480d-80e3-5a27294d2f45 ; 10.3990/1.9789036546669 ; urn:isbn:978-90-365-4666-9 ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html

Chicago Manual of Style (16th Edition):

Alakhramsing, Shivam Sharwien. “Towards a fundamental understanding of the tribological behaviour of cam-roller follower contacts.” 2019. Doctoral Dissertation, University of Twente. Accessed September 19, 2020. https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; 3ea78a51-f232-480d-80e3-5a27294d2f45 ; 10.3990/1.9789036546669 ; urn:isbn:978-90-365-4666-9 ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html.

MLA Handbook (7th Edition):

Alakhramsing, Shivam Sharwien. “Towards a fundamental understanding of the tribological behaviour of cam-roller follower contacts.” 2019. Web. 19 Sep 2020.

Vancouver:

Alakhramsing SS. Towards a fundamental understanding of the tribological behaviour of cam-roller follower contacts. [Internet] [Doctoral dissertation]. University of Twente; 2019. [cited 2020 Sep 19]. Available from: https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; 3ea78a51-f232-480d-80e3-5a27294d2f45 ; 10.3990/1.9789036546669 ; urn:isbn:978-90-365-4666-9 ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html.

Council of Science Editors:

Alakhramsing SS. Towards a fundamental understanding of the tribological behaviour of cam-roller follower contacts. [Doctoral Dissertation]. University of Twente; 2019. Available from: https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; 3ea78a51-f232-480d-80e3-5a27294d2f45 ; 10.3990/1.9789036546669 ; urn:isbn:978-90-365-4666-9 ; urn:nbn:nl:ui:28-3ea78a51-f232-480d-80e3-5a27294d2f45 ; https://research.utwente.nl/en/publications/towards-a-fundamental-understanding-of-the-tribological-behaviour-of-camroller-follower-contacts(3ea78a51-f232-480d-80e3-5a27294d2f45).html

.