Applications With a New 6-Dof Bending Machine in Tube Forming Processes

Goto, Hiroyuki; Ichiryu, Ken; Saito, Hidenobu; Ishikura, Yuu; Tanaka, Yutaka

doi:10.5739/isfp.2008.183

Cited by 14 publications

(9 citation statements)

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“…H. Goto et al [25,26] proposed a new type of multifunctional pipe-bending machine. By feeding the pipe into the fixed die and mobile die, adjusting the position of the mobile die can achieve bending.…”

Section: Introductionmentioning

confidence: 99%

3D Pipe Forming of a New Bending Machine with a 3PUU–3RPS Hybrid Mechanism

Zhang

Yue

et al. 2022

Machines

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To achieve the spatial variable curvature bending process of metal pipes, one 3PUU–3RPS hybrid mechanism designed for the free-bending forming of pipes is presented in this study. Its kinematics model was conducted based on theoretical analysis, and the obtained result was validated through ADAMS simulation. Through the theoretical analysis, the inverse position model of the proposed mechanical construction, which can show the relationship between the motion and the drive of the working platform, was presented. The velocity Jacobian matrix was also obtained and analyzed by establishing the inverse velocity model and inverse acceleration model. In addition, the static stiffness analysis of the proposed mechanical construction was also conducted in ABAQUS. Finally, by investigating its working space, the capability of 3PUU–3RPS mechanism was proved.

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Section: Introductionmentioning

confidence: 99%

3D Pipe Forming of a New Bending Machine with a 3PUU–3RPS Hybrid Mechanism

Zhang

Yue

et al. 2022

Machines

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“…There are a lot of reports on the free bending process. Goto et al 12 bent the tube freely using a fixed, and a movable die separately. In this mechanism, a hexapod table with six degrees of freedom and an electrohydraulic servo control system were used to control the motion of the movable parts.…”

Section: Introductionmentioning

confidence: 99%

The effects of loading path on process parameters in the free tube forming process

Mosavi

Mazdak

Sheykholeslami

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The free bending method is the simplest method among the tube bending processes without the use of a die. Despite the simplicity of the process, there is no proper control over the geometrical tolerance of the product. The loading path or in other words the bearing movement mechanism is one of the effective factors on product geometry. In this paper, a finite element simulation has been carried out to investigate two different bearing movement time-paths (synchronous and asynchronous mechanisms); then, the results have been verified with experimental tests. The thickness distribution in different directions, ovality, bending radius, and applied forces on the bearing and the tube for both bearing movement mechanisms are the main results of this paper. The amplitude of thickness change in both mechanisms was equal. But there is a uniform trend in variation of thickness distribution in synchronous mechanisms. So, better geometrical quality of products is expected in this mechanism. On the other hand, because of uniform force distribution with tube movement in the bearing and tube, the stability of the asynchronous mechanism is higher than the synchronous mechanism.

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“…Existing innovative solutions (i.e. [5] to [9]) for the production of such spatial profile and tubular components show the importance of and the necessity for robust and adaptive manufacturing techniques. Studies regarding TSS bending method have shown its vast potential in forming of profiles made of high strength steels (i.e.…”

Section: Introductionmentioning

confidence: 99%

3D Numerical Analysis of 2D Profile Bending with the Torque Superposed Spatial Bending Method

Hudovernik¹,

Staupendahl²,

Gharbi³

et al. 2013

SV-JME

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Engineering research, in the field of light weight design, is strongly oriented towards the development of new high strength materials and innovative forming methods, capable of withstanding limitations with regard to the wide variety of technological and economical aspects. Cost effective lightweight construction, in addition to the reduction of energy/material consumption and overall reduction of weight, also strongly depends on stability, continuity and robustness of production processes. Kinematic solutions for the production of spatial designed structures, in terms of 3D bending of profiles and tubes, show great potential in an increase of efficiency in the field of light weight design. The Torque Superposed Spatial bending method -TSS, developed at the Institute of Forming Technology and Lightweight Construction, Technische Universität Dortmund, represents an innovative, robust and cost effective technical solution for 2D and 3D bending of tubes and profiles and offers a wide spectrum of capabilities, such as process continuity, parameter adaptation and flexibility for spatial bending of profiles with arbitrary cross-sections. In this paper, an introduction to 3D numerical analysis of the 2D profile bending method using TSS method is introduced and presented. The first objective of the work is to establish validity of the numerical model for the bending parameters, such as the bending force and bending momentum. Secondly, further investigations of the state of stresses and strains during load and unload conditions were performed. These are important for any further analysis and understanding of spring-back, residual stresses and cross section deformation of the profiles. The numerical simulations are performed with the use Abaqus software code, with elastic plastic material characteristics, and are, for the purpose of validation, compared to experimental data.

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Applications With a New 6-Dof Bending Machine in Tube Forming Processes

Cited by 14 publications

References 0 publications

3D Pipe Forming of a New Bending Machine with a 3PUU–3RPS Hybrid Mechanism

3D Pipe Forming of a New Bending Machine with a 3PUU–3RPS Hybrid Mechanism

The effects of loading path on process parameters in the free tube forming process

3D Numerical Analysis of 2D Profile Bending with the Torque Superposed Spatial Bending Method

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