Determination of process parameters for the NC bending of a TA18 tube

Zhan, Mei; Huang, Tao; Jiang, Zhiqiang; Zhang, Peipei; Yang, He

doi:10.1007/s00170-013-4787-2

Cited by 6 publications

(8 citation statements)

References 11 publications

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“…It is found that the larger the mandrel diameter is, the larger the wall thinning degree of bent tube is. These results are similar to those of the NC bending for TA18 tube [9], but the effects of the mandrel diameter on wall thinning are more obvious in this work. The maximum wall thinning degree with mandrel diameter of 5.23 mm, 5.33 mm, and 5.43 mm is 10.1%, 11.6%, and 13.6%, respectively.…”

Section: Effect Of Mandrel Diameter On Cross Section Qualitysupporting

confidence: 88%

“…It can be seen from Figure 8(b) that the larger the mandrel diameter is, the smaller the cross section deformation degree is. These results are similar to those of the NC bending for TA18 tube [9], but the effects of the mandrel diameter on cross section deformation are more obvious in this work. And the peak of 2169 tube deflects toward the bending plane as mandrel diameter increases, which is different from that of the NC bending for TA18 tube [9].…”

Section: Effect Of Mandrel Diameter On Cross Section Qualitysupporting

confidence: 88%

“…These results are similar to those of the NC bending for TA18 tube [9], but the effects of the mandrel diameter on cross section deformation are more obvious in this work. And the peak of 2169 tube deflects toward the bending plane as mandrel diameter increases, which is different from that of the NC bending for TA18 tube [9]. The maximum cross section deformation degree with mandrel diameter of 5.23 mm is more than 4.2%, while the maximum cross section deformation degree with mandrel diameter of 5.43 mm is less than 1.8%.…”

Section: Effect Of Mandrel Diameter On Cross Section Qualitysupporting

confidence: 88%

“…By FE and experimental analysis, Zhan et al [9] studied the various in wall thickness and cross-section under various operating parameters and mandrel parameters for the NC bending of TA18 tubes and presented a method for quickly determining the range of the axial mandrel feed. Li et al [10][11][12][13][14] researched the deformation behavior of wall thickness and cross-section of NC bending of stainless steel and aluminum alloy tubes under different bending conditions, including the bending for the tube with large diameter and/or small bending radius [10,11], the push assistant loading conditions [12], the role of mandrel [13], and different clearance between tube and dies [14].…”

Section: Introductionmentioning

confidence: 99%

“…Yang et al [17][18][19] experimentally investigated the influence of process parameters and geometric parameters on forming quality of thin-walled NC bending tube. Though the above researches mainly focus on the effect of process parameters and geometric parameters on forming quality of thin-walled tube NC bending, and study on the effect of mandrel on cross section quality is still scant [9,13,17], they could provide a reference for relevant investigation of stainless steel 2169 small diameter tube NC bending.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of Mandrel on Cross-Section Quality in Numerical Control Bending Process of Stainless Steel 2169 Small Diameter Tube

Fang

Wang

et al. 2013

Advances in Materials Science and Engineering

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The tube numerical control (NC) bending process is a much complex physical process with multifactors coupling interactive effects. The mandrel is the key to improve forming quality and to enhance forming limit. In this study, based on the platform of ABAQUS/Explicit, a 3D elastic-plastic finite element model of NC bending process of 2169 (0Cr21Ni6Mn9N) stainless steel tube was established, key technological problems were solved, and its reliability was validated. Then, simulation and analysis of the processes were carried out, and the influence laws of mandrel types and mandrel parameters on cross-section quality were obtained. The results show that the wall thinning or cross section deformation is serious at the middle part and small in the vicinity of the bending plane or initial bending plane; the wall thinning degree increases or the cross section deformation degree decreases with the increase of mandrel diameter or mandrel extension length; the effect of bulb mandrel on the cross section quality is more significant than that of cylinder mandrel. And the reasonable mandrel types and mandrel parameters are chosen for the 2169 high-pressure hydraulic tube with small diameter. The results may lead to better understanding of mandrel role in the improvement of forming quality and forming limit in the NC bending process.

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Section: Effect Of Mandrel Diameter On Cross Section Qualitysupporting

confidence: 88%

Section: Effect Of Mandrel Diameter On Cross Section Qualitysupporting

confidence: 88%

Section: Effect Of Mandrel Diameter On Cross Section Qualitysupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Mandrel on Cross-Section Quality in Numerical Control Bending Process of Stainless Steel 2169 Small Diameter Tube

Fang

Wang

et al. 2013

Advances in Materials Science and Engineering

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Influence of additional tensile force on the stress and deformation of numerically controlled tube bending

Daxin

Rong-ting

2014

Int J Adv Manuf Technol

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Deformation behaviors of 21-6-9 stainless steel tube numerical control bending under different friction conditions

Fang

Wang

et al. 2015

J. Cent. South Univ.

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For contact dominated numerical control (NC) bending process of tube, the effect of friction on bending deformation behaviors should be focused on to achieve precision bending forming. A three dimensional (3D) elastic-plastic finite element (FE) model of NC bending process was established under ABAQUS/Explicit platform, and its reliability was validated by the experiment. Then, numerical study on bending deformation behaviors under different frictions between tube and various dies was explored from multiple aspects such as wrinkling, wall thickness change and cross section deformation. The results show that the large friction of wiper die−tube reduces the wrinkling wave ratio η and cross section deformation degree ΔD and increases the wall thinning degree Δt. The large friction of mandrel−tube causes large η, Δt and ΔD, and the onset of wrinkling near clamp die. The large friction of pressure die−tube reduces Δt and ΔD, and the friction on this interface has little effect on η. The large friction of bending die−tube reduces η and ΔD, and the friction on this interface has little effect on Δt. The reasonable friction coefficients on wiper die−tube, mandrel−tube, pressure die−tube and bending die−tube of 21-6-9 (0Cr21Ni6Mn9N) stainless steel tube in NC bending are 0.05−0.15, 0.05−0.15, 0.25−0.35 and 0.25−0.35, respectively. The results can provide a guideline for applying the friction conditions to establish the robust bending environment for stable and precise bending deformation of tube bending.

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Determination of process parameters for the NC bending of a TA18 tube

Cited by 6 publications

References 11 publications

Effect of Mandrel on Cross-Section Quality in Numerical Control Bending Process of Stainless Steel 2169 Small Diameter Tube

Effect of Mandrel on Cross-Section Quality in Numerical Control Bending Process of Stainless Steel 2169 Small Diameter Tube

Influence of additional tensile force on the stress and deformation of numerically controlled tube bending

Deformation behaviors of 21-6-9 stainless steel tube numerical control bending under different friction conditions

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