A forming technology of spur gear by warm extrusion and the defects control

Wang, Wei; Zhao, Jun; Zhai, Ruixue

doi:10.1016/j.jmapro.2015.10.001

Cited by 22 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…al. [19] observed an underfilling problem in their study. It can be seen that maximum forming load is achieved at 25mm.…”

Section: Resultsmentioning

confidence: 92%

Simulation of Helical Gear Forming of Az31 Magnesium Material

Ayer¹

2017

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

The simulation of helical gear forming is investigated in this study. AZ31 type magnesium material was selected for workpiece material because of its high specific strength. The finite element method was used to simulate the closed die upsetting method for magnesium material of helical gear upsetting. Three dimensional finite element analyses were carried out to obtain the forming load, effective stress, effective strain and temperature change with DEFORM-3D software.

show abstract

“…al. [19] observed an underfilling problem in their study. It can be seen that maximum forming load is achieved at 25mm.…”

Section: Resultsmentioning

confidence: 92%

Simulation of Helical Gear Forming of Az31 Magnesium Material

Ayer¹

2017

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

show abstract

“…Li et al investigated the open-die extrusion of a spline shaft [6]. Similar problems were also studied by Wang et al [7,8]. In turn, MacCormack et al employed the upsetting technique to form a spline shape on the head of an aerospace fastener [9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of a Six Stage Forging Process for Producing Hollow Flanged Parts from Tubular Blanks

Winiarski¹,

Bulzak²,

Wójcik³

et al. 2020

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

This paper presents the results of a numerical analysis of a cold forging process for a hollow flanged part. The analysis was performed using Deform 2D/3D. 42CrMo4 steel tubes were used as the billet material, and their material model in the annealed state was described by a constitutive equation. The forming process was performed in six stages with the use of methods such as extrusion with a movable sleeve, open-die extrusion, and upsetting. The objective of the study was to determine whether the proposed forging technique could be used to produce hollow parts with flanges. The determination was made based on the analysis of product geometry quality and process parameters, including the Cockcroft-Latham ductile fracture criterion and forming forces.

show abstract

“…20,21 Furthermore, FE analysis of the ring rolling process is the recent focus to simulate the effect of size of forming rolls, the hydraulic adjustment mechanism, and the key technological parameter design of the hydraulic ram. 22,23 FE analysis was also utilized in the multi-directional forging presses to simulate the stiffness and deformation characteristic of preload frame structure under different loading states. 24 Moreover, a FE model has been developed to simulate the residual stresses as generated from quenching T-section components of AA7050 aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

Deformation mechanism of forging tool for multi-stage forming of deep groove ball bearing

Liao¹,

Hsu

Huang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

In this study, two design configurations routinely adopted in actual mass production for deep groove ball bearing rings of multi-stage warm forging process are investigated numerically and experimentally. The deformation mechanism, forging defects, microstructures, and compositions analysis are the main focus of this study. For type A design with a stepped configuration, inner and outer rings are automatically pierced and separated in the multi-step forging machine. On the other hand, for the type B geometry, additional step is required by the customized milling machine. For type A design, the main issue encountered during actual forging process is the inadequate material filling at the upper corner radius and folding defects at the transition area of inner wall of forgings. For type B design, the material flow is unsatisfactorily directed and lower outer radius is insufficiently filled. Therefore, variations of forging parameters include billet weight, punch/knock out pin geometry and the effect of lubricating fluid is systematically investigated. In addition, the finite element method has been performed and compared with the actual forging experiments. In summary, the modification of tooling design, dimension variation of billet weight, and the forging temperature difference as impacted by the lubricating fluid, which are identified as the three major factors of the forging integrity and stability of the mass production process. The results are particularly useful for the advanced tooling design and contribute largely to minimize the tool failure and the integrity of the bearing forged.

show abstract

A forming technology of spur gear by warm extrusion and the defects control

Cited by 22 publications

References 16 publications

Simulation of Helical Gear Forming of Az31 Magnesium Material

Simulation of Helical Gear Forming of Az31 Magnesium Material

Numerical Analysis of a Six Stage Forging Process for Producing Hollow Flanged Parts from Tubular Blanks

Deformation mechanism of forging tool for multi-stage forming of deep groove ball bearing

Contact Info

Product

Resources

About