Recent development in orbital forging technology

Nowak, J.; Madej, Łukasz; Ziółkiewicz, S.; Plewiński, A.; Grosman, F.; Pietrzyk, M.

doi:10.1007/s12289-008-0076-2

Cited by 42 publications

(20 citation statements)

References 4 publications

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“…Incremental forming techniques have the potential to form components with lower loads than conventional bulk forming [64,65], as loads are applied to small segments of a workpiece at a time. Several studies have been conducted into incremental forging, which demonstrates the advantages of forming using a large number of small stages [66][67][68][69][70][71].…”

Section: Incremental Formingmentioning

confidence: 99%

A review of force reduction methods in precision forging axisymmetric shapes

Politis

Lin

et al. 2018

Int J Adv Manuf Technol

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This paper provides a review of the methods developed over the years for reducing working forces for the precision metal forming processes. Precision forging normally involves completely, or near completely closed cavity dies with no or minimal draft, making features on the extremities difficult to fill and requiring high loads. Means to minimise load, in order to enhance tool life, or reduce press capacity are crucial to the success of precision forging processes. The main concentration of this study is on design features which can be incorporated in tooling and/or workpiece in order to assist in minimisation of forging load while achieving complete die filling. The load reduction methods are presented using examples mainly of precision gear forging, which is representative of the precision forging of other axisymmetric components with complex peripheral shape. The methods reviewed are divided into the categories of (i) billet design, (ii) tool design and (iii) process design. Their effects on forging load reduction for precision forging, along with the authors' opinions as to the benefits, drawbacks and applicability of each, are presented.

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Section: Incremental Formingmentioning

confidence: 99%

A review of force reduction methods in precision forging axisymmetric shapes

Politis

Lin

et al. 2018

Int J Adv Manuf Technol

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“…Due to its advantages above, many scholars have conducted researches, mainly on the calculation of energetic parameters (Oudin et al, 1985;Choi et al, 1997;Canta et al, 1998), contact mechanisms (Hawkyard et al, 1977;Pei et al, 1982;Hua, 2011, 2012) and the deformation mechanisms of billets (Nowak et al, 2008;Montoya et al, 2008;Deng et al, 2011;Rusz and Dyja, 2004;Samoyk, 2013), while the researches on the movement of the swing head in rotary forging process were rare. Hu and Che (1993) analyzed the motion path of swing head in PXW rotary forging press.…”

Section: Introductionmentioning

confidence: 99%

Influence of eccentricity of double eccentricity sleeves on the movements of swing head in rotary forging press

et al. 2019

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Rotary forging is an innovative incremental metal forming process, In a rotary forging press with double eccentricity sleeves, the eccentricity of double eccentricity sleeves has significant effects on the movements of swing head. The internal and external eccentricity of the existing rotary forging machine is equal, except circular path, the rotation speed of internal and external eccentric sleeves for the rose curve, spirals curve and straight line is not equal, which will produce the oscillation centrifugal force during the forming process and cause the violent shaking on the machine. The shaking of the machine has an important influence on the life of the equipment parts machining accuracy and surface profile of parts, reducing the production efficiency. This paper proposes a method to reduce shaking by changing eccentricity and studied the influence of unequal eccentricity on the movements of swing head obtained the design relationship of internal and external sleeves eccentricity, which can reduce the shaking in rotary forging press. This study improving the working state of the rotary forging machine and economic benefits.

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“…It does not require heating, provides high accuracy and good quality of the formed surfaces [4]. Obviously, in a cold forging, technological force will be higher than at a hot one with lower plasticity of metal.…”

Section: Introductionmentioning

confidence: 99%