Effects of upper platen configuration in the rotary forging process and rotary forging into a contoured lower platen

Appleton, E.; Slater, R. A. C.

doi:10.1016/0020-7357(73)90030-9

Cited by 16 publications

(6 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many researchers before have used analytical models for the design of rotary forging processes (Standring & Appleton, 1979;Hawkyard et al, 1979;Appleton & Slater, 1972;Kubo & Hirai, 1979;Kobayashi et al, 1979). With many simplifying assumptions, they were able to estimate the process parameters and had reasonable success in predicting the load and geometry (Hawkyard et al, 1979;Kubo & Hirai, 1979;Kobayashi et al, 1979).…”

Section: Computer Methods In Materials Sciencementioning

confidence: 99%

On the Specifics of Modelling of Rotary Forging Processes

Krishnamurthy¹,

Bylya²,

Muir³

et al. 2017

cmms

View full text Add to dashboard Cite

Rotary forging process, in spite of its various advantages, has still not reached industrial production scale owing to its complex nature. With the advent of sophisticated finite-element modelling capabilities, it is now possible to make rotary forging more predictable and optimize it for industrial production standards.However, modelling by nature involves a series of assumptions and simplifications that can help us make reasonable predictions. It is important to know the important factors that affect the results, and what compromises can be made, with a genuine understanding of what the compromises will result in. This paper reports some initial findings from our attempt towards robust modelling for the design of the rotary forging process. Herein, we have taken the simple case of rotary upsetting of cylinders using a custom-designed rotary forging machine and modelled it using commercial metal-forming software QForm.

show abstract

Section: Computer Methods In Materials Sciencementioning

confidence: 99%

On the Specifics of Modelling of Rotary Forging Processes

Krishnamurthy¹,

Bylya²,

Muir³

et al. 2017

cmms

View full text Add to dashboard Cite

show abstract

“…This in turn renders the design for the processing and shaping of tool kinematics a significant challenge. Previous studies in this area are limited [ (Tamang et al 2017;Montoya et al 2008;Oudin et al 1985;Appleton and Slater 1973)] and stock commercial finite element software packages are not well suited to model this process, due in large part to the big uncertainty in having an appropriate material model and assumptions on boundary conditions.…”

Section: Figure 1 Representation Of the (A) Versatile Range Of Compon...mentioning

confidence: 99%

Instability Analysis in Incremental Rotary Forming of Tube Flanges

et al. 2021

View full text Add to dashboard Cite

Rotary forming is an exciting route for forming flanges of different angles from seamless tubes of high-strength materials. True to its incremental nature, the process offers great flexibility, but the issues encountered are atypical and complex. One such issue observed in experimental trials is the internal buckling of tubes during specific instances of flange formation. The origin of this instability is non-trivial, and ordinarily, finite-element (FE) models fail to capture this instability. To analyse and understand the problem, systematic experimental trials were carried out using different tube thicknesses, tube materials and tool kinematics. This paper summarises the results from a critical analysis to establish (1) a criteria for quantifying the instability and identifying the instances of its occurrence, (2) a validation methodology to fine-tune FE models for the process, and (3) use of FE models to understand the influence of tool path in the flange forming stage.

show abstract

“…The classical cold orbital forging equipment with four paths of top punch was developed by Marciniak. 1 For revealing deforming laws, the forces used for deformation, [2][3][4] contacting rules between workpiece and top punch, [5][6][7] and deforming characters [8][9][10][11][12][13][14][15][16][17][18] were analyzed with the objective of rings and cylinders. The technologies with the objective of complex parts were developed.…”

Section: Introductionmentioning

confidence: 99%

Preform designing approach in cold orbital forging of flange gear

Jin

Hua

2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Flange gear has a complex geometry and its volume distribution along the axial direction changes suddenly. This makes it difficult to be formed by a single step using a simple cylinder workpiece and the preform is necessary. This research aims at proposing a preform designing approach in cold orbital forging of flange gear. A three-dimensional finite element model of cold orbital forging of flange gear is first constructed. Then, the cold orbital forging processes are simulated under different preform geometries and the insufficient filling and folding defects are studied. At last, the preform is optimized and the defects are eliminated. The experiments are also performed and the preform designing approach in cold orbital forging of flange gear is verified.

show abstract

Effects of upper platen configuration in the rotary forging process and rotary forging into a contoured lower platen

Cited by 16 publications

References 1 publication

On the Specifics of Modelling of Rotary Forging Processes

On the Specifics of Modelling of Rotary Forging Processes

Instability Analysis in Incremental Rotary Forming of Tube Flanges

Preform designing approach in cold orbital forging of flange gear

Contact Info

Product

Resources

About