ACCUEIL

Consignes aux
auteurs et coordonnateurs
Nos règles d'éthique
Autres revues >>
International Journal of Forming Processes
1292-7775
Temporarily suspended: no issues since 2008
 

 ARTICLE VOL 5/1 - 2002  - pp.71-107  - doi:10.3166/ijfp.5.71-107
TITLE
Theoretical Studies in Flow Forming of Tubes: A Review

ABSTRACT
Flow forming is an advanced metal forming method to produce high strength high precision rotationally symmetric components with very good surface finish. In flow forming the original tube blank, called preform, is subjected to incremental wall thickness reduction by intensive application of localized compressive stress using rotating conical rollers on a rotating mandrel. The preform material deforms plastically and flows over the mandrel as programmed by a CNC flow-forming machine. The deformed material has a stretched crystalline structure with a resulting reduction in ductility, increase in hardness, yield strength and ultimate tensile strength due to work hardening. Flow forming is a very promising technology as it can meet the challenging requirements of high specific strength, close dimensional tolerance and excellent surface finish. The process is quite versatile in view of the fact that a great variety of tubular parts can be manufactured with basically the same tooling. The ever-increasing strength demands of defence and aerospace sectors have given considerable impetus to research work in this area for the last three decades. Flow forming of tubes is reviewed here with the objective of giving a systematic and simplified analysis of the various theoretical studies reported in the literature. Theoretical models help in predicting various force components exerted by the flow forming roller, design of rigid flow forming machine frames and selection of proper power rating for flow forming machines. The various theoretical approaches like slab and slip-line method of analysis, upper-bound method, work of plastic deformation and elasto-plastic incremental finite element technique are reviewed and a comparative chart is made for all the theoretical models.


AUTEUR(S)
K. M. RAJAN, S.K. DESHPANDE, S. K. SALWAN, K. NARASIMHAN

Reçu le 27 avril 2001.    Accepté le 3 janvier 2002.

KEYWORDS
Flow Forming, Preform, Mandrel, Work Hardening, Forward Flow Forming, Reverse Flow Forming.

LANGUE DE L'ARTICLE
Anglais

 PRIX
• Abonné (hors accès direct) : 7.5 €
• Non abonné : 15.0 €
|
|
--> Tous les articles sont dans un format PDF protégé 
   
INDISPONIBLE



Mot de passe oublié ?

ABONNEZ-VOUS !

CONTACTS
Comité de
rédaction
Conditions
générales de vente

 English version >> 
made by WAW Lavoisier