Machining vibrations (original) (raw)
Machining vibrations, also called chatter, are the relative movement between the workpiece and the cutting tool. The vibrations result in waves on the machined surface. This affects typical machining processes, such as turning, milling and drilling, and atypical machining processes, such as grinding. A chatter mark is an irregular surface flaw left by a wheel that is out of true in grinding or regular mark left when turning a long piece on a lathe, due to machining vibrations.
| Property | Value |
|---|---|
| dbo:abstract | Les vibrations d'usinage correspondent à un mouvement relatif entre la pièce usinée et l'outil coupant, ce qui se traduit par des ondulations plus ou moins marquées sur la surface usinée, que ce soit en tournage, fraisage, perçage ou rectification. Dès 1907, Frédérick W. Taylor décrit les vibrations d'usinage comme le plus obscur et délicat de tous les problèmes auxquels doit faire face l'usineur, cela est toujours vrai comme en témoigne la nombreuse littérature (mots clefs dans les moteurs de recherche: «vibrations d'usinage» en français, «machining chatter» en anglais). Les modèles mathématiques permettent de reproduire assez fidèlement ce phénomène, mais en pratique il est toujours difficile de le résoudre à tout coup et les règles d'or de l'usineur sont: * rigidifier au maximum la pièce, l'outil et la machine (outil plus rigide, pièce mieux tenue, par exemple) * choisir l'outil qui excitera le moins les vibrations (en changeant les angles de l'outil, les revêtements, par exemple) * choisir les meilleures fréquences d'excitation pour empêcher le système usinant de se mettre en vibrations (vitesse de rotation, nombre de dents de l'outil et répartition, par exemple) (fr) Machining vibrations, also called chatter, are the relative movement between the workpiece and the cutting tool. The vibrations result in waves on the machined surface. This affects typical machining processes, such as turning, milling and drilling, and atypical machining processes, such as grinding. A chatter mark is an irregular surface flaw left by a wheel that is out of true in grinding or regular mark left when turning a long piece on a lathe, due to machining vibrations. As early as 1907, Frederick W. Taylor described machining vibrations as the most obscure and delicate of all the problems facing the machinist, an observation still true today, as shown in many publications on machining. The explanation of the machine tool regenerative chatter was made by Tobias. S. A. and W. Fishwick in 1958, by modeling the feedback loop between the metal cutting process and the machine tool structure, and came with the stability lobes diagram. The structure stiffness, damping ratio and the machining process damping factor, are the main parameters that defines the limit where the machining process vibration is prone to enlarge with time. Mathematical models make it possible to simulate machining vibration quite accurately, but in practice it is always difficult to avoid vibrations. (en) |
| dbo:wikiPageExternalLink | http://www.mmsonline.com/articles/minimizing-vibration-tendencies-in-machining.aspx https://www.youtube.com/watch%3Fv=voU6bDKi2JE |
| dbo:wikiPageID | 19455326 (xsd:integer) |
| dbo:wikiPageLength | 10461 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1118442959 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Frederick_Winslow_Taylor dbr:Computer-aided_manufacturing dbr:Machining dbr:Total_indicator_reading dbr:Drilling dbr:Shock_Pulse_Method dbr:Cutting_tool dbr:Balancing_machine dbr:Time_domain dbc:Machining dbr:Trial_and_error dbr:Grinding_(abrasive_cutting) dbr:Milling_machine dbr:Machinist dbr:Turning dbr:Knowhow dbr:Robustify dbr:Vibrations dbr:Relative_movement |
| dbp:wikiPageUsesTemplate | dbt:Reflist |
| dcterms:subject | dbc:Machining |
| rdfs:comment | Machining vibrations, also called chatter, are the relative movement between the workpiece and the cutting tool. The vibrations result in waves on the machined surface. This affects typical machining processes, such as turning, milling and drilling, and atypical machining processes, such as grinding. A chatter mark is an irregular surface flaw left by a wheel that is out of true in grinding or regular mark left when turning a long piece on a lathe, due to machining vibrations. (en) Les vibrations d'usinage correspondent à un mouvement relatif entre la pièce usinée et l'outil coupant, ce qui se traduit par des ondulations plus ou moins marquées sur la surface usinée, que ce soit en tournage, fraisage, perçage ou rectification. Dès 1907, Frédérick W. Taylor décrit les vibrations d'usinage comme le plus obscur et délicat de tous les problèmes auxquels doit faire face l'usineur, cela est toujours vrai comme en témoigne la nombreuse littérature (mots clefs dans les moteurs de recherche: «vibrations d'usinage» en français, «machining chatter» en anglais). (fr) |
| rdfs:label | Vibrations d'usinage (fr) Machining vibrations (en) |
| owl:sameAs | freebase:Machining vibrations wikidata:Machining vibrations dbpedia-fa:Machining vibrations dbpedia-fr:Machining vibrations https://global.dbpedia.org/id/3GmvP |
| prov:wasDerivedFrom | wikipedia-en:Machining_vibrations?oldid=1118442959&ns=0 |
| foaf:isPrimaryTopicOf | wikipedia-en:Machining_vibrations |
| is dbo:wikiPageRedirects of | dbr:Chatter_(machining) dbr:Chatter_mark_(machining) |
| is dbo:wikiPageWikiLink of | dbr:Virtual_machining dbr:Vibration dbr:Condition_monitoring dbr:Machine_tool dbr:Machinability dbr:Machining dbr:Chatter_(machining) dbr:Reamer dbr:Countersink dbr:Jerk_(physics) dbr:Milling_(machining) dbr:Okuma_Corporation dbr:Shock_pulse_method dbr:Chatter_mark_(machining) dbr:Surface_finish |
| is foaf:primaryTopic of | wikipedia-en:Machining_vibrations |