TY - BOOK
T1 - MM99.81 Projection welding of complex geometries
AU - Kristensen, Lars
PY - 1999
Y1 - 1999
N2 - The objective of this work has been to establish a profound
knowledge about design rules for projection welding geometries
dependent of the actual material combination.Design rules and
recommendations for geometries and projections in projection
welding given in literature is summarised and these are catalogued
into geometry-classes. A simulation software, SORPAS, based on the
finite element method (FEM) is chosen as tool to investigate
projection weld quality. SORPAS needs input of the material flow
stress as function of strain, strain rate and temperature. Flow
stress experiments are performed using a thermo-mechanical
simulation machine (Gleeble machine)for stainless steel (W. no.
1.4301) and mild steel (W. no. 1.0037) for temperatures between 20
°C and 1300 °C and for free cutting brass (W. no. 2.0401) for
temperatures between 20 °C and 800 °C. Two different strain rates,
10 s-1 and 25 s-1, have been investigated.Two different welding
geometries, disc with triangular ring projection welded to ring
and hat welded to inside hole in ring, are both experimentally and
numerically used to investigate the influence of different
geometric parameters (thicknesses and angles) on weldability and
weld strength when welding different material combinations
(stainless steel to stainless steel, mild steel to stainless
steel, brass to stainless steel and stainless steel to mild
steel). The investigations show that geometric parameters and
material combinations have great influence on the weldability and
the weld strength. Based on the investigations some general design
rules for the two geometries has been recommended.
AB - The objective of this work has been to establish a profound
knowledge about design rules for projection welding geometries
dependent of the actual material combination.Design rules and
recommendations for geometries and projections in projection
welding given in literature is summarised and these are catalogued
into geometry-classes. A simulation software, SORPAS, based on the
finite element method (FEM) is chosen as tool to investigate
projection weld quality. SORPAS needs input of the material flow
stress as function of strain, strain rate and temperature. Flow
stress experiments are performed using a thermo-mechanical
simulation machine (Gleeble machine)for stainless steel (W. no.
1.4301) and mild steel (W. no. 1.0037) for temperatures between 20
°C and 1300 °C and for free cutting brass (W. no. 2.0401) for
temperatures between 20 °C and 800 °C. Two different strain rates,
10 s-1 and 25 s-1, have been investigated.Two different welding
geometries, disc with triangular ring projection welded to ring
and hat welded to inside hole in ring, are both experimentally and
numerically used to investigate the influence of different
geometric parameters (thicknesses and angles) on weldability and
weld strength when welding different material combinations
(stainless steel to stainless steel, mild steel to stainless
steel, brass to stainless steel and stainless steel to mild
steel). The investigations show that geometric parameters and
material combinations have great influence on the weldability and
the weld strength. Based on the investigations some general design
rules for the two geometries has been recommended.
M3 - Book
BT - MM99.81 Projection welding of complex geometries
PB - Department of Manufacturing Engineering, Technical University
of Denmark
CY - Lyngby, Denmark
ER -