Belyaeva
A.Yu., Cand.Tech.Sc.,
The algorithm
for designing action sequences tool holders with
elastic elements
The results of
theoretical and experimental studies that resulted in
the three previous sections of one of
the effective ways to solve
the important problem of fragmentation
and turning chips during treatment
is the use
of tool holders
with elastic elements to implement
the process of cutting vibration.
Among the factors
that held back until now
widespread use of tool holders
with elastic elements was the
lack of methods
for designing and calculating the structural parameters of elastic
elements for equipment of this
type.
Conducted by the author of this
study allowed us to develop
methods for calculating the structural parameters of elastic elements
tool carriers implementation process by vibrating crushing
chips cut towards the longitudinal
feed and in the tangential
direction. This method of calculation
can be used
to develop effective tool carriers structural elastic elements that provide a steady crushing chips during the
cutting process and, consequently, productivity and safety of the
machine.
Recommendations by the
structural parameters of elastic elements
tool carriers
When selecting dimensions,
base surfaces and mounting tool
holders of preference should be given structures,
parameters are regulated by standards
that would reduce the cost
of production. The criteria for
selecting rational constructions tool holders during their development are universal, adequate rigidity and accuracy, manufacturability
design, the possibility of rapid replacement understudy and other factors that
determine the effectiveness of their use in
Rotary groups, namely, the turning-revolving and multi lathes.
Organize advice on
choosing tool holders with elastic
elements for crushing chips /
In the first
stage, the initial parameters for the development
of the circuit
design. These parameters include: design features considering the overall dimensions of standard tool
holders and their technological purposes on the
one hand, the external load
and select the type of
vibrating tools and direction over
its actions on the other.
The second phase
deals with basic equipment specifications with elastic elements. These include: specifications tooling machine base; options
fixing mechanism equipping a working body, such as
revolving head; requirements for static and dynamic
parameters of elastic snap elements;
availability of tool spindle driven
to perform the drilling-milling operations in turning, which
can be used
as a tool carriers vibration drive.
The third phase
is developed mathematical model of turning tool
holders with PE. The mathematical
model includes the required specifications
and parameters of the machine
mounting mechanism, as well as
static and dynamic characteristics of PE equipment.
The fourth step
is developed a mathematical model of a vibrating tool over the
selected direction crushing chips.
The fifth and
sixth phase involves the development
of settlement schemes elastic elements and theoretical
research tool holders, which include calculation of hardness and
elastic elements selected spatial configuration and determining the frequency characteristics of equipment.
The seventh step
includes comparing the strength and
rigidity of the elastic elements
of different designs and perform
preliminary calculations using the method
of initial parameters or Ritz
method, where defined geometric dimensions of elastic
elements.
Then, on the eighth stage, using
computer programs created solid model
tool carriers with defined geometrical
dimensions, which imposed the appropriate
boundary conditions and the necessary
load.
At the ninth
stage examines stress - strain state using the
finite element method, which involves
visualization elastic deformation of the object studied
and the frequency
of oscillation.
The tenth stage
compare the results of calculations
of static characteristics of traditional methods and using ITU
that will be sure at
small percentages between the results
of the calculation,
further using the ITU for
more complex calculations.
At last, the
eleventh stage, make recommendations on the selection
parameters IE tool holders.
Literature
Belyaeva A. Development of sustainable design principles elastic elements turning tool carriers
fragmentation of chips Dis. Kiev, 2009. -candidate. Sc. Sciences: 05.03.01 / Belyaeva Anastasiya
Yurevna 191с.