Technological failures in sheet stamping

Virtor Demin

doi:10.30987/2223-4608-2020-8-23-28

Technological failures in sheet stamping

Science intensive technologies in mechanical engineering ◽

10.30987/2223-4608-2020-8-23-28 ◽

2020 ◽

Vol 2020 (8) ◽

pp. 23-28

Author(s):

Virtor Demin

Keyword(s):

Stability Loss ◽

Sheet Stamping ◽

Prediction Criteria

The prediction criteria of technological failures in sheet stamping are considered. Particular attention is paid to failures as billet destruction and stability loss during deformation.

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Automated system for work preparation of parts production by sheet stamping

Blanking productions in mechanical engineering (press forging, foundry and other productions) ◽

10.36652/1684-1107-2020-18-3-108-114 ◽

2020 ◽

pp. 108-114

Author(s):

L.R. Kashapova ◽

D.L. Pankratov ◽

V.G. Shibakov

Keyword(s):

Deformation Process ◽

Automated System ◽

Tool Performance ◽

Sheet Stamping ◽

Mechanical And Physical Properties ◽

Preparation Stage ◽

Process Reliability ◽

Recurrent Defects ◽

Automated Process ◽

Reliability Performance

The procedure of automated process reliability evaluation is developed in order to prevent recurrent defects in parts manufactured by die stamping. The procedure is based on the analysis of such factors as part design, material, its mechanical and physical properties; equipment parameters, tool performance, etc. The list of reliability factors may vary according to type of operation as deformation process is different for each group of operations. The adjustment of stamping process reliability performance prevents any defects emerging during production of critical parts as early as the work preparation stage.

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Bending of sheets and profiles on a four-roll machine for rocket bodies, tube and frame products. Part 4

10.36652/0042-4633-2020-8-45-54 ◽

2020 ◽

pp. 45-54

Author(s):

V.A. Zharkov

Keyword(s):

Mathematical Model ◽

Stressed State ◽

Sheet Stamping ◽

Formation Of Cracks ◽

Processing Steps

A theory and a mathematical model are developed for calculating the parameters of the strain-stressed state at the stages of pre-bending, calibration, straightening and bending of the straightened section, taking into account the strengthening of the billet on a roll machine. By CAD/CAE modeling the strains, stresses and forces acting on the billet from the rolls are investigated. Criteria for the formation of cracks, low accuracy and excessive springing of the billet after these processing steps are determined, recommendations are given for their elimination. Keywords billet, sheet stamping, bending, roll machine, pre-bending, calibration, straightening, bending of the straightened section, CAD/CAE modeling. [email protected]

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A critical examination of PIO prediction criteria

10.2514/6.1998-4335 ◽

1998 ◽

Cited By ~ 8

Author(s):

David Mitchell ◽

David Klyde

Keyword(s):

Critical Examination ◽

Prediction Criteria

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Investigations on the Mechanical Properties and Formability of Friction Stir Welded Tailored Blanks

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.344.143 ◽

2007 ◽

Vol 344 ◽

pp. 143-150 ◽

Cited By ~ 6

Author(s):

Gianluca Buffa ◽

Livan Fratini ◽

Marion Merklein ◽

Detlev Staud

Keyword(s):

Mechanical Properties ◽

Stress Condition ◽

Research Effort ◽

High Strength Steels ◽

High Strength ◽

Tensile Tests ◽

Friction Stir ◽

Tailored Blanks ◽

Sheet Stamping ◽

Wide Range

Tight competition characterizing automotive industries in the last decades has determined a strong research effort aimed to improve utilized processes and materials in sheet stamping. As far as the latter are regarded light weight alloys, high strength steels and tailored blanks have been increasingly utilized with the aim to reduce parts weight and fuel consumptions. In the paper the mechanical properties and formability of tailored welded blanks made of a precipitation hardenable aluminum alloy but with different sheet thicknesses, have been investigated: both laser welding and friction stir welding have been developed to obtain the tailored blanks. For both welding operations a wide range of the thickness ratios has been considered. The formability of the obtained blanks has been characterized through tensile tests and cup deep drawing tests, in order to show the formability in dependency of the stress condition; what is more mechanical and metallurgical investigations have been made on the welded joints.

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A Methodology for Deliberating Prediction Criteria

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.1758 ◽

2011 ◽

Vol 130-134 ◽

pp. 1758-1761 ◽

Cited By ~ 1

Author(s):

Chia Yean Lim ◽

Vincent K.T. Khoo ◽

Bahari Belaton

Keyword(s):

Decision Makers ◽

Predictive Analysis ◽

Economic Downturn ◽

Relative Importance ◽

Rule Based ◽

Customer Needs ◽

Prediction Criteria ◽

Unstructured Information ◽

New Criteria ◽

Technology Trends

The economic downturn has been forcing many companies to use predictive analysis for spotting emerging product and technology trends and also future customer needs. Since every company is unique, without the assistance of some methodologies and tools, decision makers encounter great difficulties in conducting predictive analysis, especially in the deliberation and prioritization of new prediction criteria derived from the publicly available unstructured information. This paper proposes a unique methodology which attempts to integrate the personalization and visualization of new prediction criteria. The challenging iterative tasks are achieved through a rule-based inconsistency detection triad-based comparison algorithm, supported by sophisticated visual displays of the relative importance among the prediction criteria. It is hoped that the proposed methodology will intuitively support the decision makers in exploring and deliberating new criteria for making better predictions.

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