Optimization of cushion conditions in micro multi-point sheet forming

Liu, Qiqian; Lü, Cheng; Fu, Wenzhi; Li, Mingzhe; Gong, Xuepeng

doi:10.1016/j.jmatprotec.2011.07.015

Cited by 17 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the rubber cushion, Ogden model (N = 3) is adopted to represent the constitutive relation. Detailed parameters for the rubber can be found in Liu et al’s 6 work. In the material model, von Mises yield criterion and isotropic hardening are employed.…”

Section: Methodsmentioning

confidence: 99%

“…However, challenges come from surface defects such as dimples caused by discontinuous contact between the sheet and the punch [3]. Li et al [4][5][6] improved the MPF process by developing homogeneous deformation forming path, blank-holding strategies and improving the cushion conditions. Hardt et al [7] introduced the closed-loop shape control into the MPF system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thickness control in a new flexible hybrid incremental sheet forming process

Zhang

Lü

Chen

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thickness control in a new flexible hybrid incremental sheet forming process

Zhang

Lü

Chen

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…Shulkin et al [8] developed an eight-point blank holder force control system in a viscous pressure forming (VPF) machine, and Liu et al [9] con rmed that the formability of a sheet stretched with VPF is higher than that of a sheet stretched with a hard punch due to the lower interface friction. Liu et al [10] optimized cushion conditions in micro multipoint sheet forming to obtain better surface quality and thickness distribution. Li et al [11] used a sparse multipoint exible forming tool to obtain doubly curved shapes of AA2050-T34 plates in creep age forming.…”

Section: Introductionmentioning

confidence: 99%

Zinc-based alloy rapid tooling for sheet metal forming reinforced by SLM steel inlays

Wen

Liu

Wang

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Among the existing rapid and economical sheet metal forming technologies, stamping with a press using soft tools, especially low-melting-point alloy dies, is one of the few methods that can meet the precision requirements in industrial elds such as automobile manufacturing. However, the usability of the method is limited by the low strength of the soft base. The current study proposes a new structure of zinc-based alloy dies for sheet metal forming, where the weak features of the die blocks, such as protruding edges, are reinforced by selective laser melting (SLM) steel inlays imbedded during solid-liquid compound casting. A technical route for fabricating the new tools was developed, and a W-shaped part was formed using an SUS304 sheet with a thickness of 0.32 mm and an Al6061 sheet with a thickness of 1 mm to validate the concept. The experiment and simulation results proved that clearer localized features, such as a smaller radius, can be formed on the workpiece with the reinforcement of steel inlays, while the springback is smaller and the abrasion resistance of the tool is higher. This method can improve the forming quality and durability of traditional soft tools in a convenient and affordable way.

show abstract

“…Liu et al. 9 developed a finite element model with the consideration of size effect to simulate the micro-MPF process. The results show that the surface quality of the formed parts can be improved by selecting the proper elastic cushion.…”

Section: Introductionmentioning

confidence: 99%

“…The numerical results and experimental results show that the numerical simulation could accurately predict the forming defects in MPF process. Liu et al 9 developed a finite element model with the consideration of size effect to simulate the micro-MPF process. The results show that the surface quality of the formed parts can be improved by selecting the proper elastic cushion.…”

Section: Introductionmentioning

confidence: 99%

Research on the elastic cushion conditions in multi-point thermoforming for polymer sheet

Cao

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part E:

Self Cite

View full text Add to dashboard Cite

Multi-point thermoforming is a new flexible technique for manufacturing three-dimensional polymer sheet parts. The fixed die utilized in conventional thermoforming process is replaced by a multi-point die, which can be reconfigured rapidly and nearly cost-free. In the present study, the effects of the elastic conditions on the surface quality and shape accuracy of the formed workpiece have been investigated through experiments and numerical simulations. The results show that an elastic cushion with proper thickness and hardness can significantly improve the surface quality of the workpiece. It has also been found that the application of lubrication can improve the shape accuracy of the formed workpiece.

show abstract

Optimization of cushion conditions in micro multi-point sheet forming

Cited by 17 publications

References 17 publications

Thickness control in a new flexible hybrid incremental sheet forming process

Thickness control in a new flexible hybrid incremental sheet forming process

Zinc-based alloy rapid tooling for sheet metal forming reinforced by SLM steel inlays

Research on the elastic cushion conditions in multi-point thermoforming for polymer sheet

Contact Info

Product

Resources

About