Application of mold trough design to blanking technology

Huang, Guoming; Wang, Jang-Ping; Hsu, Ming-Hung; Huang, Kuo‐Chen; Chen, Te-Tsun; Chen, Tai-Cheng

doi:10.1007/s00170-016-8799-6

Cited by 7 publications

(14 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The current fine-blanking process tends to reduce the size of the deformation zone and improve the initiation and growth of microcracks in the failure zone. The literature has mostly discussed the application of FEA combined with a damage model to simulate the damage behavior of the shear plane [9] and die design to control the quality of the shear surface [10]. Zhao et al [11] conducted microstructure observation to determine the fracture failure mode in the shear zone of the DP600 steel plate fine-blanking process.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical simulation and optimization of fine-blanking process for copper alloy sheet

Kuo

Liu

Li³

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

When the fine-blanking process is used, secondary grinding or processing can be omitted because the shear surface of fine-blanking parts can achieve almost zero fracture zone requirements. The primary objective of the fine-blanking process is to reduce the fracture zone depth and die roll zone width. This study used a 2.5-mm-thick central processing unit (CPU) thermal heat spreader as an example. Finite element analysis software was employed to simulate and optimize the main eight process parameters that affect the fracture zone depth and die roll zone width after fine-blanking: the V-ring shape angle, V-ring height of the blank holder, V-ring height of the cavity, V-ring position, blank holder force, counter punch force, die clearance, and blanking velocity. Simulation analysis was conducted using the L18 (21 × 37) Taguchi orthogonal array experimental combination. The simulation results of the fracture zone depth and die roll zone width were optimized and analyzed as quality objectives using Taguchi’s smaller-the-better design. The analysis results revealed that with fracture zone depth as the quality objective, 0.164 mm was the optimal value, and counter punch force made the largest contribution of 25.89%. In addition, with die roll zone width as the quality objective, the optimal value was 1.274 mm, and V-ring height of the cavity made the largest contribution of 29.45%. Subsequently, this study selected fracture zone depth and die roll zone width as multicriteria quality objectives and used the robust multicriteria optimal approach and Pareto-optimal solutions to perform multicriteria optimization analysis. The results met the industry’s fraction zone depth standard (below 12% of blank thickness) and achieved a smaller die roll zone width.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Fig 10. Fracture zone depth and die roll zone width of the CPU thermal heat spreader, which were selected as the quality objectives…”

mentioning

confidence: 99%

Numerical simulation and optimization of fine-blanking process for copper alloy sheet

Kuo

Liu

Li³

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Therefore, it is crucial to accurately grasp the elastoplastic behavior of large strain and the critical damage criterion. To date, literature has mostly discussed the application of FEA combined with a damage model to simulate the damage behavior of the shear plane [9] and die design to control the quality of the shear surface [10]. Wang [11] used a slotted ring to replace the conventional V-ring in the fine-blanking process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Optimization of Fine-Blanking Process for Copper Alloy Sheet

Kuo

Liu

et al. 2021

Preprint

View full text Add to dashboard Cite

When the fine-blanking process is used, secondary grinding or processing can be omitted because the shear surface of fine-blanking parts can achieve almost zero fracture zone requirements. Fine-blanking has the advantages of high precision and high production efficiency. It was originally used on watch parts, but with increasingly refined technology, it has been widely applied in computers, consumer electronics, communication products, and vehicle parts. The primary objective of the fine-blanking process is to reduce the fracture zone depth and die roll zone width. This study used a 2.5mm thick central processing unit (CPU) thermal heat spreader as an example. Finite element analysis software was employed to simulate and optimize the main eight process parameters that affect the fracture zone depth and die roll zone width after fine-blanking: the V-ring shape angle, V-ring height of the blank holder, V-ring height of the cavity, V-ring position, blank holder force, counter punch force, die clearance, and blanking velocity. Simulation analysis was conducted using the L18 (21×37) Taguchi orthogonal array experimental combination. The simulation results of the fracture zone depth and die roll zone width were optimized and analyzed as quality objectives using Taguchi’s smaller-the-better design. The analysis results revealed that with fracture zone depth as the quality objective, 0.164 mm was the optimal value, and counter punch force made the largest contribution of 25.89%. In addition, with die roll zone width as the quality objective, the optimal value was 1.274 mm, and V-ring height of the cavity made the largest contribution of 29.45%. Subsequently, this study selected fracture zone depth and die roll zone width as multi-criteria quality objectives and used the robust multi-criteria optimal approach and Pareto-optimal solutions to perform multi-criteria optimization analysis. The results revealed the optimal fracture zone depth and die roll zone width were 0.239 mm and 1.288 mm, respectively. Finally, the experimental results verified that the fracture zone depth was 0.230 mm and die roll zone width was 1.205 mm. The findings met the industry’s fraction zone depth standard (below 12% of blank thickness) and achieved a smaller die roll zone width.

show abstract

“…The most promising of all cutting methods, in terms of productivity and waste, are cutting with a shear and bend breaking. Comprehensive studies of waste-free methods for cutting of the rolled stocks have been widely carried out [3][4][5][6][7][11][12][13][14][15][16][17][18]. During this time, a large amount of information has been accumulated on the nature, mechanisms and criteria of fracture.…”

mentioning

confidence: 99%

“…During this time, a large amount of information has been accumulated on the nature, mechanisms and criteria of fracture. The following scientists made a significant contribution to the development of this science: K. Kessler [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

mentioning

confidence: 99%

Original Research the use of a Neural Network Classifier of Material Facture Criteria for the Rational Choice of the Method for Cutting of Rolled Stocks

Karnaukh

Марков

Kukhar

et al. 2021

Preprint

View full text Add to dashboard Cite

To select a rational method for cutting of rolled stocks made from materials with different physical and mathematical properties, an engineer must have the tools to make such a choice. For this, it is proposed to use the well-known synergistic material fracture criteria. In order to find the most informative system of synergetic criteria allowing to classify materials authentically by their fracture sensitivity, the software was developed. It allows to solve the clustering problem in a multidimensional space of parameters and present the obtained information in a visual form using self-organizing Kohonen maps. The cluster analysis of the synergetic criteria of fracture material was carried out. The most informative criterion among the ones characterizing the mechanical properties of steels is the «offset yield strength», among the synergistic ones – «scale criterion». At the same time, among the traditional mechanical features of steels, a set allowing to classify materials with a given integrity by their cutting sensitivity has not been found. It was established that the synergistic criteria: «crack propagation criterion» and «brittleness criterion» are basic informative features. When adding any of the remaining complex criteria («crack nucleation criterion» or «scale criterion»), they form the most informative sets of minimal power, providing the classification of materials by their cutting sensitivity with a given integrity. In order to obtain high quality billets at a minimum conversion cost, recommendations were developed for choice of the method for cutting of rolled stocks in magnitude of criteria values: «crack propagation criterion» and «brittleness criterion». To cut materials «in plastic state», the cutting with a shear should be used, specifically – a closed cut-off scheme or an incompletely closed cut-off scheme with an active transverse clamp or a cut-off scheme with a differentiated rolling clamp. If increased requirements are imposed on the geometric accuracy of the billets, it is recommended to use complex blanking and cutting processes. For cutting materials «in elastoplastic state» there are good reasons to use a cut with a shear, and in particular – an incompletely closed cut-off scheme with an active and passive transverse clamp. Closer to the class interval, it is possible to apply cold bend breaking with the application of an effective stress concentrator. Cold bend breaking should be used to cut «brittle» materials. The carried out experiments confirmed the adequacy of theoretical conclusions and recommendations on the choice of a rational method for cutting of the rolled stocks to obtain high quality billets.

show abstract

Application of mold trough design to blanking technology

Cited by 7 publications

References 13 publications

Numerical simulation and optimization of fine-blanking process for copper alloy sheet

Numerical simulation and optimization of fine-blanking process for copper alloy sheet

Numerical Simulation and Optimization of Fine-Blanking Process for Copper Alloy Sheet

Original Research the use of a Neural Network Classifier of Material Facture Criteria for the Rational Choice of the Method for Cutting of Rolled Stocks

Contact Info

Product

Resources

About