Procedure For Tool Life Improvement
Procedure For Tool Life Improvement
Procedure For Tool Life Improvement
Development of new Static tension and Numerical modelling of Analysis of the Localization of
PM tool steels with compression tests the cyclic stress-strain elastic-plastic the most critical
improved properties, response material response area of the die
Cyclic step tests
especially with in the die
regard to increased
fatigue strength Fatigue tests Determination of Calculation of the Estimation of
Whler curve and damage / energy die life until
damage parameters dissipation in the crack initiation
critical die area incl. life scatter
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (2)
Development of new Static tension and Numerical modelling of Analysis of the Localization of
PM tool steels with compression tests the cyclic stress-strain elastic-plastic the most critical
improved properties, response material response area of the die
Cyclic step tests
especially with in the die
regard to increased
fatigue strength Fatigue tests Determination of Calculation of the Estimation of
Whler curve and damage / energy die life until
damage parameters dissipation in the crack initiation
critical die area incl. life scatter
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (3)
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (4)
Aim:
To get maximum information Youngs modulus, Poisson ratio
about static and cyclic
properties with a minimum 0.05%, 0.1% and 0.2% tensile yield stress
number of specimens stress-strain response under tension
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (5)
ASP23 at 62 HRc
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (6)
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (7)
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (8)
Development of new Static tension and Numerical modelling of Analysis of the Localization of
PM tool steels with compression tests the cyclic stress-strain elastic-plastic the most critical
improved properties, response material response area of the die
Cyclic step tests
especially with in the die
regard to increased
fatigue strength Fatigue tests Determination of Calculation of the Estimation of
Whler curve and damage / energy die life until
damage parameters dissipation in the crack initiation
critical die area incl. life scatter
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (9)
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (10)
g prestress level
din
a stress at maximum process load
lo
stress range
stress at max.
process load
g
in
prestress level
ad
g
Strain parameters:
in
lo
un
ss
tre
strain range
es
pr
mean strain
cyclic plastic strains
strain range
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (11)
W t W e W p
The Material tests within the COLT project
prove the relation between the amount of
energy and the fatigue life until crack
initiation.
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (12)
Stress
Technical requirement:
increased loadability of
the prestressing system
provided by STRECON
prestressed container
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (13)
Stress
range
reduces the cyclic
plastic strains
Technical requirement:
high loadability and
stiffness of the
prestressing system
provided by STRECON
E+ prestressed container
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (14)
casing
strip-winding
winding core
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (15)
Strip-winding
provides the strength and controls casing
the prestress distribution
strip-winding
high-strength steel strip:
62-64 HRc, E = 210 GPa winding core
yield stress > 2000 MPa
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (16)
casing
strip-winding
winding core
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (17)
Development of new Static tension and Numerical modelling of Analysis of the Localization of
PM tool steels with compression tests the cyclic stress-strain elastic-plastic the most critical
improved properties, response material response area of the die
Cyclic step tests
especially with in the die
regard to increased
fatigue strength Fatigue tests Determination of Calculation of the Estimation of
Whler curve and damage / energy die life until
damage parameters dissipation in the crack initiation
critical die area incl. life scatter
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.
COLT Design Manual for Cold Forging Dies Cyclic plasticity and low-cycle fatigue (18)
Established within the GROWTH project GRD1-1999-10748 "Improvement of Service Life and Reliability of Cold Forging Tools
with respect to Fatigue Damage due to Cyclic Plasticity (COLT)", funded by the European Community.