The elastic behaviour of tube drawing dies subjected to a sinking process

1967 ◽  
Vol 2 (2) ◽  
pp. 134-136
Author(s):  
B Kenny
Keyword(s):  
Outer Surface ◽  
Elastic Behaviour ◽  
Theoretical Expression ◽  
Strain Gauges ◽  
Hoop Strain ◽  
Analysis Study ◽  
Tube Drawing ◽  
Drawing Die ◽  
Drawing Dies ◽  
Strain Hardening Rate

A numerical stress analysis study of a tube drawing die of conical profile is used in conjunction with a theoretical expression predicting die pressures in a sinking process, to obtain hoop strain information for the outer surface of a tube drawing die. The analysis indicates that material strain hardening rate and coefficient of friction both affect the hoop strain distributions, but their separate effects may be measured individually by appropriate positioning of strain gauges on the outer surface of the die.

Tests of some Taper-Hub Flanges with Narrow Gaskets

1972 ◽  
Vol 14 (2) ◽  
pp. 98-106 ◽  
Author(s):  
H. Fessler ◽  
J. K. Musson
Keyword(s):  
Mild Steel ◽  
Internal Pressure ◽  
Outer Surface ◽  
Elastic Behaviour ◽  
Strain Gauges ◽  
Spheroidal Graphite ◽  
Failure Characteristics ◽  
Methods Of Calculation ◽  
External Forces

Seventeen 4 in bore models having two pipe thicknesses, various flange thicknesses and hub lengths, made of spheroidal graphite (s.g.) iron, mild steel and bronze, were subjected to series of initial bolt tensions and, at each bolt tension, pressurized in stages to leakage or failure of the metal. Outer surface strains were measured at each stage. Elastic behaviour was also determined from some Araldite models using strain gauges or frozen stress photoelasticity. The elastic flange-hub fillet stresses due to initial tightening are compared with predictions based on Taylor-Forge and DIN methods of calculation. For different positions of gasket reactions, the effect of internal pressure on flange fillet stresses may be predicted from consideration of the external forces. Plastic-elastic behaviour is described; leakage and failure characteristics are presented.

Research on the Wire Drawing Die Pass Parameter Calculation Based on the Least Square Algorithm

2012 ◽  
Vol 591-593 ◽  
pp. 850-853
Author(s):  
Huai Xing Wen ◽  
Yong Tao Yang
Keyword(s):  
Pore Structure ◽  
Least Squares ◽  
Least Squares Method ◽  
Piecewise Linear ◽  
Wire Drawing ◽  
Least Square ◽  
Structure Characteristics ◽  
Drawing Die ◽  
The Wire ◽  
Drawing Dies

Drawing Dies meter A / D acquisition module will be collected from the mold hole contour data to draw a curve in Matlab. According to the mold pore structure characteristics of the curve, the initial cut-off point of each part of contour is determined and iteratived optimization to find the best cut-off point, use the least squares method for fitting piecewise linear and fitting optimization to find the function of the various parts of the curve function, finally calculate the pass parameters of drawing mode. Parameters obtained compare with the standard mold, both of errors are relatively small that prove the correctness of the algorithm. Also a complete algorithm flow of pass parameters is designed, it can fast and accurately measure the wire drawing die hole parameters.

Combined Evaluation Composite Pressure Vessel With Thin-Wall Metal Liner by Acoustic Emission and Strain Gauges

2013 ◽  
Author(s):  
Junqing Zhao ◽  
Xiaodong He
Keyword(s):  
Acoustic Emission ◽  
Outer Surface ◽  
Pressure Vessel ◽  
Water Pressure ◽  
Great Influence ◽  
Local Buckling ◽  
Strain Gauges ◽  
Hydraulic Pressure ◽  
Thin Wall ◽  
Composite Pressure Vessel

Filament wound composite pressure vessel with thin-wall alloy liner might exist local buckling during manufacture and in service, this phenomenon have great influence on the security and service lifetime of pressure vessel. AE (acoustic emission) technique is employed to monitor the damage progression of the vessel during hydraulic pressure experiment. Two sensors of acoustic emission (AE) were attached to front dome and cylinder to monitoring the behavior of the vessel bearing maximum 4.5MPa water pressure during loading, keeping load and unloading. Meanwhile ten strain gauges were bonded to front dome, equator and cylinder of the outer surface by meridian and hoop direction respectively in order to monitor the vessel deformation characters. Analysis show that strain gauges is suitable for evaluate deformation character of the outer surface of the vessel. Analysis indicated AE is more suitable to monitoring the damage propagation of the vessel. AE analysis explained the local buckling of inner thin-wall liner.

Features of Mechanical Treatment of Zirconia Crystals when Manufacturing Dies

2021 ◽  
Vol 1037 ◽  
pp. 203-208
Author(s):  
Valery V. Alisin ◽  
Michael A. Borik ◽  
Alexei V. Kulebyakin ◽  
Elena E. Lomonova ◽  
Dmitriy M. Gutsev
Keyword(s):  
Mechanical Treatment ◽  
Wire Drawing ◽  
Drawing Process ◽  
Stabilized Zirconia ◽  
Zirconia Ceramics ◽  
Cable Industry ◽  
Drawing Die ◽  
Friction Units ◽  
Drawing Dies ◽  
Highly Loaded

Materials based on partially stabilized zirconia (ceramics and crystals) are distinguished by high values of mechanical strength, crack resistance, hardness, corrosion resistance, low coefficient of friction when operating in tandem with most metals, which makes them promising materials for a wide tribotechnical application in highly loaded friction units. An example of such a unit is the die mechanism, which is an integral part of the drawing die tool in the cable industry. These hard precision tools (drawing dies or wire dies) actually determine the ultimate success in the wire drawing process.

A CAPP/CAD for Sheet Metal Deep Drawing

2014 ◽  
Vol 619 ◽  
pp. 105-109
Author(s):  
R.K. Abdel-Magied ◽  
H.M.A. Hussein
Keyword(s):  
Sheet Metal ◽  
Deep Drawing ◽  
Computer Aided Design ◽  
Basic Program ◽  
Integrated System ◽  
Computer Aided Process Planning ◽  
Drawing Die ◽  
Computer Aided ◽  
Aided Design ◽  
Drawing Dies

The aim of this work is to develop an integrated system for facilitating the process of designing the drawing dies and their component. The developed system is based on the integration between Computer Aided Process Planning in Sheet Metal Drawn parts “CAPP”, and the Computer Aided Design in Deep Drawing Die components “CAD”. Both modules are coded using Visual Basic program and joined with AutoCAD. The CAPP module made to report the drawing load and to plot the shape of the drawn shell in each stage of the Axis-Symmetric Deep Drawing process. Based on the reported shell geometry, the dimensions of the die components are calculated and transferred to the CAD module. The CAD module, which is based on many data bases (standard parts, sheet metal data), plots the required deep drawing die components for each drawn stage on the AutoCAD monitor. A demonstrated example is presented to validate the developed system and to show that the system results are acceptable.

Strains in an annular rock dynamometer

1965 ◽  
Vol 1 (1) ◽  
pp. 31-36 ◽  
Author(s):  
D. W. Jordan
Keyword(s):  
Stress Condition ◽  
Elastic Behaviour ◽  
Strain Gauges ◽  
Rock Stress ◽  
Steel Cylinder ◽  
Inner Radius ◽  
Mine Workings

An analysis is given of the elastic behaviour of an annular borehole plug dynamometer for measuring changes in the stress condition of rock about mine workings, consisting of a hollow steel cylinder fitted into a hole drilled in the rock. Increments of rock stress are deduced from the readings of strain gauges placed circum-ferentially about the inner radius. The sensitivity is calculated for the instrument for two cases: when it is cemented into the hole and when it is a sliding fit. The latter case is taken as the possible extreme result of a breakdown in the cementation.

Sign in / Sign up

Export Citation Format

Share Document