New warm forming processes to produce hollow shafts

Neugebauer, Reimund; Kolbe, Matthias; Glaß, R.

doi:10.1016/s0924-0136(01)00939-6

Cited by 37 publications

(22 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The lower mass of machines and equipment leads to lower cost of production, and furthermore, allows for lower energy and fuel consumption and exhaust emission during its operation [1]. Moreover, the technical parameters of machines and equipment, in which hollow elements were applied, are enhanced.…”

Section: Introductionmentioning

confidence: 99%

Limits of the Process of Rotational Compression of Hollow Stepped Shafts

2019

View full text Add to dashboard Cite

This article presents the results of theoretical–experimental testing of the process of rotational compression of hollow stepped shafts. The advantages of the technology and the potential area of its application were discussed. Further on, the limits of the rotational compression technology, preventing the manufacturing of high-quality products, were presented. The research was conducted on the basis of numerical modelling using the finite element method in Simufact Forming, as well as the results of experimental tests performed in a forging machine for rotational compression. On the basis of the results obtained, it can be stated that the process of rotational compression of hollow stepped shafts can be hindered by the following phenomena: uncontrolled slip, deformation of the semi-finished product wall, twisting of the formed steps, material cracking, and deformation of the cross-section of the formed steps. The possibility of those hindrances occurring depends heavily on the assumed technological parameters of the process. For this reason, knowledge of the cause of occurrence of those limitations is vital for the development of the technology and the choice of the process parameters.

show abstract

Section: Introductionmentioning

confidence: 99%

Limits of the Process of Rotational Compression of Hollow Stepped Shafts

2019

View full text Add to dashboard Cite

show abstract

“…Such a solution requires, however, working out advanced metal forming technologies, which allow for manufacturing of hollow products both from full and hollow billet ( in the form of commercial pipes) [3]. According to rating made by Neugebauer et all [4], at present for metal forming of hollow elements are applied such technologies as: roll flowing, cross-wedge rolling, forging on swaging machines and horizontal forging machines, hydroforming, extrusion in cold and hot etc. Majority of the used so far metal forming methods of hollow products and semi-finished products are characterized by large degree of complexity and require application of expensive machines and devices.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis of Rotary Compression of Ball Pins Hollow Forgings

Tomczak

Bulzak

Pater

2016

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

This paper presents the chosen results of ball pins hollow forgings forming by means of rotary compression. Theoretical research was based on numerical simulations, conducted using finite element method. The software Simufact was applied for calculations needs. During simulations, kinematics of material flow, strain intensity distribution, damage criterion according to Cockroft-Latham and temperature distributions were determined. Force parameters in the process were also determined and limiting phenomena were identified. Results from FEM modeling were verified in laboratory conditions. Ball pins hollow forgings forming tests were performed in a special forge aggregate. The obtained results fully confirmed the possibility of ball pins hollow forgings manufacturing by means of rotary compression.

show abstract

“…Research is also conducted to investigate if hollow shafts can be produced by cross wedge rolling (CWR) [8]. Recent developments in such innovative forming methods as spin extrusion and rotary compression confirm that the issues of forming hollow stepped shafts are still relevant today [9,10]. However, the aforementioned methods for producing hollow shafts require using sophisticated machines or performing more operations [11].…”

Section: Introductionmentioning

confidence: 99%

The influence of hollow billet thickness in rotary compression

Tomczak

Pater

Bulzak

2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

The study presents a selection of numerical and experimental results of producing hollow stepped shafts. The first part of this study describes the advantages of using hollow parts in machine design and discusses the main fields of their applications. Next, an innovative rotary compression method for producing stepped axes and shafts is proposed. In order to estimate the technological potential of rotary compression, we performed comprehensive numerical and experimental analyses of producing hollow stepped shafts by this new technique. First, the rotary compression process for hollow parts was modeled numerically by the finite element method. The 3D modeling was made using the Simufact Forming software. The numerical results were then verified by experimental tests conducted under laboratory conditions. The experiments were performed using a machine designed by the authors of the present study. The following variables were investigated in the experiments: the effect of billet wall thickness on the process, the quality and geometry of products, and variations in loads and torques. The experimental results confirm that rotary compression can be used to produce hollow stepped shafts with a wide range of thicknesses.

show abstract

New warm forming processes to produce hollow shafts

Cited by 37 publications

References 0 publications

Limits of the Process of Rotational Compression of Hollow Stepped Shafts

Limits of the Process of Rotational Compression of Hollow Stepped Shafts

Theoretical and Experimental Analysis of Rotary Compression of Ball Pins Hollow Forgings

The influence of hollow billet thickness in rotary compression

Contact Info

Product

Resources

About