BS 7848-1996 Gears - Wear and damage to gear teeth - Terminology《齿轮 齿轮齿的磨损和损伤 术语》.pdf

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1、 ISO 10825 : 1995(E/F)1.1.2 Abrasive wear (concluded) 1.1.2 Usure abrasive (fin)Abrasive wear which has removed significantUsure abrasive qui s est developpee sur les deuxamounts of material from opposite flanks of gearflancs et qui a fait dispara tre une grande quantitteeth,de matire la surface des

2、 dents.Deep radial grooves can be seen in the dedenda.On note la presence de profondes rayures radialesau niveau du creux des dents.7ISO 10825 : 1995(E/F)1.1.3 Excessive wear 1.1.3 Usure excessiveExcessive wear may appear similar to moderateor abrasive wear. The progression rate, however,is such tha

3、t the design life of the gear set may notbe attained. The teeth will have a considerableamount of material removed from the surfaces.L aspect dune usure excessive sera similaire celui dune usure modre ou abrasive. Toutefois,la vitesse de dveloppement est telle que la durede vie prvue ne pourra pas t

4、re atteinte. Lesdents auront une quantit de matire enleveconsiderable.Excessive wear by the abrasion of opposite flanks Pignon avec une usure excessive sur les deuxof pinion teeth. flancs obtenue par abrasion.NOTE - Excessive wear can also be caused by NOTE - Une usure excessive peut aussi tre cause

5、polishing after tooth geometry has been extensively par du poli miroir lorsque la gomtrie des dents a tchanged. dforme dans de trop grandes proportions.8ISO 10825 : 1995(E/F)1.1.4 Moderate scratching (Scoring)1.1.4 Rayures - StriesFine grooves, running in the direction of slidingmotion, irregularly

6、spaced and of varying length,and often scattered over the tooth flanks.Fins sillons orients dans le sens du glissement,irrgulirement espacs, de longueurs variables etqui sont souvent clairsems sur les flancs desdents.Fine grooves visible near the tip on the toothFines rayures visibles prs du sommet

7、des dentssurfaces of a ground pinion. In this case, thed un pignon rectifi. Dans ce cas, les rayures sontscratches are distributed regularly on all the teeth.rparties rgulirement sur toutes les dents. VoirSee also the illustration in 1.1.1.aussi le clich en 1.1.1.Note the presence of grinding marks

8、on thededendum flank.Des traces de rectification sont visibles au bas desflancs.9ISO 10825 : 1995(E/F)1.1.5 Severe scratching1.1.5 GriffuresA form of abrasive wear characterized by thepresence of linear grooves in the direction of toothsliding. The grooves are smooth, similar inappearance to those f

9、ormed by ridging (see3.4), but are created by the ploughing action ofhard asperities on mating flanks or by hardparticles embedded therein.Forme d usure abrasive caractrise par la pr-sence de rayures linaires orientes dans ladirection du glissement. Ces rayures sont lisses etsont d aspect semblable

10、celui des sillons (voir3.4) mais elles sont dues au labourage des dentspar des asprits dures se trouvant dansI engrnement ou par des particules qui sontincrustes dans les flancs.Severe scratching of the entire contact surface.Wear is less severe near the operating pitchsurface. Another type of sever

11、e scratching isshown in the illustration in 1.1.2.Griffures prsentes dans toute la zone de contact.On note une usure beaucoup plus faible au niveaudu cylindre primitif de fonctionnement. Une autreforme de griffure est visible sur le clich de 1.1.2.10ISO 10825 : 1995(E/F)1.1.6 Interference wear 1.1.6

12、 Usure par interfrenceWear at the tip of one tooth and/or at the root ofthe mating tooth, caused by excess material at thetips of one or at the roots of the other.Usure en tte de saillie des dents de I une desroues et/ou au pied des dents de I autre, due unexcs de matire en tte de saillie des dents

13、deI une ou au pied des dents de I autre.The result is scraping and wear of both roots andtips of the teeth, hollowing the former and round-ing the latter.Elle se traduit par des corchures ou par uneabrasion des pieds des flancs en les vidant, ainsique par une abrasion ou une dformation desttes de de

14、nts en les arrondissant.Interference wear at a tooth flank of a gear wheel. Usure par interference nettement visible au pieddes flancs d une roue.11ISO 10825 : 1995(E/F)11.2 Corrosion 1.2 Corrosion1.2.1 Chemical corrosion 1.2.1 Corrosion chimiqueSurface degradation caused by chemical attack.Common s

15、ymptoms are fine pitting over theentire tooth surface and grain boundary oxidation.Sometimes, reddish brown rust traces are found,usually near active parts of the tooth flanks.Degradation de surface due une attaque chi-mique. Les sympt mes habituels sont de finespiqres sur la surface entire des dent

16、s et uneoxydation intergranulaire. Parfois, des traces derouille brun rouge, en general prs des partiesactives des flancs des dents, sont visibles.Extensive corrosion on gear tooth surfaces as a Corrosion importante sur la surface des dentsresult of chemical attack. d une roue qui rsulte d une attaque chimique.Damage of this nature can continue until the gearis no longer fit for use.Une dgradation de cette nature peut continuerjusqu ce que la surface des dents soit devenuecompltement inutilisable.2

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