Feasibility of Mass Production Verified by Cut Surface Quality and Tool Load in Negative Clearance Blanking

2021 ◽  
Vol 62 (724) ◽  
pp. 61-66
Author(s):  
Yohei SUZUKI ◽  
Ming YANG ◽  
Masao MURAKAWA
Keyword(s):  
Surface Quality ◽  
Mass Production ◽  
Negative Clearance ◽  
Cut Surface

scholarly journals New Measurement Method and Uncertainty Estimation for Plate Dimensions and Surface Quality

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Salah H. R. Ali ◽  
Jariya Buajarern
Keyword(s):  
Surface Quality ◽  
Mass Production ◽  
Traditional Method ◽  
Edge Crack ◽  
Measurement Method ◽  
Large Scale ◽  
Production Control ◽  
Uncertainty Estimation ◽  
New Method

Dimensional and surface quality for plate production control is facing difficult engineering challenges. One of these challenges is that plates in large-scale mass production contain geometric uneven surfaces. There is a traditional measurement method used to assess the tile plate dimensions and surface quality based on standard specifications: ISO-10545-2: 1995, EOS-3168-2: 2007, and TIS 2398-2: 2008. A proposed measurement method of the dimensions and surface quality for ceramic oblong large-scale tile plate has been developed compared to the traditional method. The strategy of new method is based on CMM straightness measurement strategy instead of the centre point in the traditional method. Expanded uncertainties budgets in the measurements of each method have been estimated in detail. The capability of accurate estimations of real actual results for centre of curvature (CC), centre of edge (CE), warpage (W), and edge crack defects parameters has been achieved according to standards. Moreover, the obtained results not only showed better accurate new method but also improved the quality of plate products significantly.

Qualitative Analysis and Study the Workpiece Shearing Surface Quality of Fine-Blanking with Negative Clearance

2011 ◽  
Vol 697-698 ◽  
pp. 371-376
Author(s):  
Hong Du ◽  
Zhong Mei Zhang
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Qualitative Analysis ◽  
Surface Quality ◽  
Reference Value ◽  
Quality Standard ◽  
Fine Blanking ◽  
Negative Clearance ◽  
Scanning Electron

The workpieces of fine blanking with negative clearance were obtained through the fine-blanking with negative clearance processing experiment. The fractography photographs of workpieces shearing surface were scanned by scanning electron microscope (SEM), and the characterization parameters and quality standard of workpieces shearing surface with negative clearance were analyzed in the processing of blanking. According to the characterization parameters and quality standard of workpieces shearing surface with negative clearance, the workpiece with the length ratio of burnish band, deflection error, rollover error and blanking burr were analyzed qualitative. The findings have a certain reference value to the blanking related profession.

scholarly journals Improving the Cut Surface Quality by Optimizing Parameters in the Fibre Laser Cutting Process

2019 ◽  
Vol 38 ◽  
pp. 1111-1120
Author(s):  
I. Amaral ◽  
F.J.G. Silva ◽  
G.F.L. Pinto ◽  
R.D.S.G. Campilho ◽  
R.M. Gouveia
Keyword(s):  
Surface Quality ◽  
Laser Cutting ◽  
Cutting Process ◽  
Fibre Laser ◽  
Cut Surface

scholarly journals Optimum Clearance in the Microblanking of Thin Foil of Austenitic Stainless Steel JIS SUS304 Studied from Shear Cut Surface and Punch Load

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 678 ◽  
Author(s):  
Yohei Suzuki ◽  
Ming Yang ◽  
Masao Murakawa
Keyword(s):  
Stainless Steel ◽  
Fracture Criterion ◽  
Hydrostatic Stress ◽  
Thin Foil ◽  
Finite Element Analyses ◽  
Fine Blanking ◽  
Punch Load ◽  
Negative Clearance ◽  
Blanking Process ◽  
Cut Surface

An extrusion-type fine blanking with a negative clearance was proposed by the authors instead of standard fine blanking for creating a full-sheared surface in the micro blanking process. In this study, micro blanking experiments and finite element analyses with narrow, zero and negative clearances are carried out for the optimizing the clearance at which a shear cut surface can be finished with a full-sheared surface with the minimized punch load. Fracture criterion, hydrostatic stress and maximum punch stress for the conditions with various clearances are investigated. As a result, it was clarified that the clearance at which the cut surface does not fracture and minimization of the punch load is achieved is gained by the use of clearance −4 μm.

Characterization of Topography of Cut Surface Based on Theoretical Roughness Indexes

2011 ◽  
Vol 496 ◽  
pp. 194-199 ◽  
Author(s):  
Csaba Felhő ◽  
János Kundrák
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Tribological Properties ◽  
Significant Influence ◽  
Machined Surface ◽  
Edge Geometry ◽  
Mathematical Relation ◽  
Cut Surface

The microgeometry of cut surfaces is one important characteristic of surface quality, since it has significant influence on the tribological properties of working surfaces. In addition to the ability to plan the economical effectiveness of cutting and the accuracy of workpieces the ability to plan the quality of machined surfaces has also emphasized importance. This is why the predictability of surface roughness in planning of technological processes is more and more important. More and more opportunities presenting themselves and one of these is the estimation of the expected value of roughness of the machined surface on the basis of the theoretical value of roughness. The paper focuses on the introduction of a method to describe a mathematical relation between the theoretical and the measured roughness indexes in cutting with tools having defined edge geometry, thus the planning may be more accurate.

Dry WEDM in Improving LS-WEDMed Surface Quality

2008 ◽  
Vol 53-54 ◽  
pp. 387-392 ◽  
Author(s):  
Tong Wang ◽  
Yu Mei Lu ◽  
Shu Qiang Xie ◽  
Shuang Shuang Hao ◽  
H. Zhao
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Wire Electrical Discharge Machining ◽  
Dry Wedm ◽  
Cut Surface ◽  
Discharge Gap

Utilizing gas as the dielectric instead of dielectric liquid has enabled the development of dry wire electrical discharge machining (dry WEDM) technology for finishing cut. Experiment results showed that Low-Speed WEDM (LS-WEDM) in gas offers advantages such as better straightness, and shorter discharge gap. This paper studies on influence of different gas dielectrics, wire winding speed and pulse duration on the WEDMed surface quality (discharge gap, straightness, surface roughness, removal rate) in finishing. New attempt of applying dry WEDM as the 4th cut had been proved feasible in improving conventional multiple cut surface quality of LS-WEDM.

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