On the running-in behavior of cam-follower mechanism

Torabi, Amir; Akbarzadeh, Saleh; Salimpour, Mohammad Reza; Khonsari, M. M.

doi:10.1016/j.triboint.2017.09.034

Cited by 29 publications

(16 citation statements)

References 28 publications

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“…Furthermore, they observed that an increased asperity interaction at high operating temperature yielded to relatively higher friction magnitude, especially in the nose of the cam profile, due to a lower curvature radius. Torabi et al [28] presented a thermo-elasto-hydrodynamics analysis to study the behavior of the cam-and-follower contact, particularly during the running-in period. Their results have shown that the rate of flattening of surface roughness is a crucial factor influencing thermal effects during the running-in period.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Flank Cams Manufactured by WEDM and Milling Processes

Buj-Corral

Zayas-Figueras

Montaña-Faiget

2020

Metals

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Cam-follower mechanisms are usually employed in different machines, like combustion engines, sewing machines, machine tools, etc. In the present paper, the option to manufacture cams utilizing wire electrical discharge machining (WEDM) has been considered. For this, surface roughness and shape error of cam profiles manufactured by the processes of milling and wire electrical discharge machining (WEDM) are presented. The methodology used covers different stages: design, prototyping, manufacturing, and measurement of the cams. As a reference, a cam-follower mechanism from a motorcycle internal combustion engine has been used. A reverse engineering process has been performed to determine the geometrical parameters of the mechanism, which are used for the synthesis of the profile of the cam and its subsequent design. The manufacturing process of the cams has been assisted by CAD-CAM (Computer Assisted Drawing-Computer Assisted Manufacturing) software. Using fused filament fabrication (FFF), a physical prototype of the cam has been manufactured, in order to validate the goodness of the design. Finally, the roughness and shape parameters have been measured on the contour surface of the cams. The arithmetical mean roughness Ra value of the milled cam was 0.269 μm, below the requirement of 0.4 μm, and shape error was 18 μm, below 50 μm. Shape error of the WEDM cam of 48 μm meets the requirements for cams. However, the Ra value of 1.212 μm, exceeded the limit. For this reason, a finish operation is recommended in this case. Some advantages of WEDM cams over milled cams are that different conductive materials can be employed, more complex shapes can be obtained, and that, in rough operations, the amount of material to be removed in subsequent operations is considerably reduced.

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Section: Introductionmentioning

confidence: 99%

Comparative Study of Flank Cams Manufactured by WEDM and Milling Processes

Buj-Corral

Zayas-Figueras

Montaña-Faiget

2020

Metals

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“…Focus of article Cam-follower (i) Wear prediction on cam-followers [8][9][10] (ii) Running-in behavior of cam-follower [11] Gear wear (iii) Spur gear wear simulation and prediction [12][13][14][15][16][17] (iv) Helical gear wear simulation and prediction [15,[18][19][20] (v) Wear studies including experiments, testing, and performance investigation of gears (spur, helical) under various conditions [15,16,[21][22][23][24][25][26][27][28][29] Bearings wear (vi) Wear simulation and prediction in bearings [30][31][32][33] (vii) Wear studies including experiments, testing, and performance investigation of bearings under various conditions [34][35][36][37][38] (viii) Monitoring of wear in bearings [39] Wheel-rail wear (ix) Wheel/rail wear simulation and prediction [40][41][42][43][44][45][46][47][48][49]…”

Section: Systemsmentioning

confidence: 99%

Computer Simulation/Prediction of Wear in Mechanical Components

Mukras

2020

Advances in Tribology

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In this paper, a state of the art on computer simulation and prediction of wear in mechanical components is reviewed. Past and recent developments as well as approaches employed in the simulation and prediction of wear are reviewed. In particular, the wear models, contact analysis schemes, and wear evolution prediction procedures as well as their application to the mechanical components (including cam-follower, gears, bearings, and cylinder/piston/piston ring wear) are reviewed. Recommendations and suggestions on possible directions for further research studies are also presented.

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“…The friction coefficient was also evaluated. This line contact thermo-elasto-hydrodynamic analysis was also performed in combination with an elasto-plastic model for the evaluation of the asperities deformation during running-in in Torabi et al (2018). Yu et al (2017) used transient thermal EHL equations to investigate the influence of coatings with different characteristics placed on the cam and/or on the tappet.…”

Section: Introductionmentioning

confidence: 99%