Application and modelling of flow forming manufacturing processes for internally geared wheels

Groche, Peter; Fritsche, D.

doi:10.1016/j.ijmachtools.2006.01.016

Cited by 43 publications

(22 citation statements)

References 1 publication

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“…In this process, an externally geared mandrel was fitted into a cup-like workpiece. By reducing the cup's outside diameter, the inner wall of the cup was rolled into the mandrel teeth, thereby producing the gear profile [8]. Tomczak et al manufactured step-shaped hollow shafts via forging from titanium alloy Ti6Al4V using rotary compression [9].…”

Section: Introductionmentioning

confidence: 99%

A sheet blank rotary forging process for disk-like parts with thickened rims

Jin

Wang

2016

J Mech Sci Technol

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Disk-like parts with both thin web plates and thick rims are widely applied in automotive and aviation industries. These parts are usually made via welding and machining, which often lead to low material utilization, high energy consumption and low product performance. Therefore, a new sheet blank rotary forging process for thickening the rims of disc-like sheet blanks with uniform thicknesses was proposed in this paper. Based on FEA and experiments, both the effects of main defects and process parameters on forming were investigated. Besides, by considering the flow line distribution in formed parts, the material deformation feature in the forming process was analyzed. The results showed that the deformation process can be divided into four stages, and there are mainly four kinds of defects occurring during forming. Materials in the outer side of rim flows not only in the radial direction but also in the tangential direction.

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Section: Introductionmentioning

confidence: 99%

A sheet blank rotary forging process for disk-like parts with thickened rims

Jin

Wang

2016

J Mech Sci Technol

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“…By using flow forming processes, a reduction of the initial wall thickness up to 90% can be achieved which results in a high work hardening and reduced notch sensitivity [3]. Forming functional elements like internal gearings can be achieved by using mandrels with a negative mould of the target geometry and a rolling of the inner diameter into the moulds [11].…”

Section: Flow Formingmentioning

confidence: 99%

Sheet-bulk metal forming – forming of functional components from sheet metals

Merklein

Gröbel

Löffler

et al. 2015

MATEC Web of Conferences

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Abstract. The paper gives an overview on the application of sheet-bulk metal forming operations in both scientific and industrial environment. Beginning with the need for an innovative forming technology, the definition of this new process class is introduced. The rising challenges of the application of bulk metal forming operations on sheet metals are presented and the demand on a holistic investigation of this topic is motivated. With the help of examples from established production processes, the latest state of technology and the lack on fundamental knowledge is shown. Furthermore, perspectives regarding new research topics within sheet-bulk metal forming are presented. These focus on processing strategies to improve the quality of functional components by the application of processadapted semi-finished products as well as the local adaption of the tribological system.

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“…Hollow parts are usually manufactured by rotary forging, upsetter forging, extrusion and welding, flow forming, and hydroforming [3][4][5][6][7]. Research is also conducted to investigate if hollow shafts can be produced by cross wedge rolling (CWR) [8].…”

Section: Introductionmentioning

confidence: 99%

The influence of hollow billet thickness in rotary compression

Tomczak

Pater

Bulzak

2015

Int J Adv Manuf Technol

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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.

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Application and modelling of flow forming manufacturing processes for internally geared wheels

Cited by 43 publications

References 1 publication

A sheet blank rotary forging process for disk-like parts with thickened rims

A sheet blank rotary forging process for disk-like parts with thickened rims

Sheet-bulk metal forming – forming of functional components from sheet metals

The influence of hollow billet thickness in rotary compression

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