forgiven移动式数控龙门铣床的总体设计外文文献翻译、中英文翻译、外文翻译

2021年1月20日发(作者：中航油)
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外文文献

Design of Movable Gantry CNC Milling Machine

ZHANG Jian
Abstract:

this
paper
describes
the
nc
milling
roller,
the
overall
design
and
analyses the bilateralsuper-modulus gear pair of driving mechanism of the main
points of design,installationguidesurface of the X axis is introduced in this paper
Keywords:


mobile



nc milling



design
T
his machine is mainly used for metal parts of the plane and inclined plane
work. It has enough rigidity, Milling head adopts milling head in Taiwan, Milling
head
with
flexible,
Spindle
motor
is
frequency
conversion
motor.
It
can
undertake
stepless
speed,
Ensure
accuracy
of
machine
tools
and
machining
precision has good stability, This machine is of high efficiency and exercise,For
convenience, make the drive more reliable and convenient in maintenance, less
consumption, beautiful modelling, etc, widely used in mechanical manufacturing
industry.
This paper described the mobile CNC milling refers to longmen framework
Vertical
milling
movement.
The
biggest
advantage
of
milling
roller
is
(1)
Machine
cover
an
area
of
an
area
small.
Workbench
mobile
Longmen
milling
machine, complete machine must be higher than vertical stroke length two times.
However,
Workbench
mobile
Longmen
milling
machine,
The
length
of
side
frame which is
fabricated according to
add only longitudinal travel
width, The
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燕山大学本科生毕业设计（论文）




dynamic response of the machine is good. Workbench mobile Longmen milling
machine adopts fixed table. The whole cast out with bed, Longmen framework of
longitudinal
motionDrive
torque
equivalent
unchanged,
It
is
not
because
of
bearing the weight of the workpiece changesChange, so as to ensure the accuracy
and performance of the machine tool.
The independent
design
mobile nc
Longmen milling
（
FIG 1
）
has been
a
special
machine
to
use.
It
can
satisfy
the
large
castings,
steel
parts
boring
and
milling, drilling, etc multiple operation process. It is right milling head,
It also
can
process
the
4
side
of
workpiece.
The
goal
of
the
main
design
parameters
such
as
Longmen
milling
under:
workbench
area
1800mm
×

4000mm,
The
travel
for
X
axis:4000mm
The
travel
for
Y
axis:2000mm
The
travel
forZ
axis:750mm, Spindle power 18.5KW, Each axis rapid federate 10m/min.

Figure 1


Mobile nc milling

1.

Mechanical parts design
The
bed
include
Bed,
Slide,
Longmen
frame
spindle
box,
Three
axis
to
drive mechanical parts and related CNC servo part, Now ,The design process is

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emphasized as follows: The bed is the basic design work, The size of the bed of
the design affects the complete machine design. And the rationality of the design
of
directly
affect
the
whole
Machine
stiffness.
The
cross- section
shape
for
the
bed
like
∏
,(FIG
2)
The
plane
is
working
on
a
bed
of
mesa
design
has
9
T
shaped
groove.
For
the
convenience
of
bed
and
working
mesa
of
pure
dig
imageT
processing,
groove
tank completely,
The right
and left
two concerning
the design has a long narrow swing plane. It is used to linear rolling guide vice,
The author put rail surface design in the two side bed. The main consideration of
force
transmission
directions
and
unloading,
Because
the
bed
will
be
dragon
framework of gravity, cutting force and the gravity of the workpiece, This design
can directly into the gravity of longmen
framework to
machine tools, and
Bed
only
suffer
the
gravity
of
the
workpiece.
The
bed
by
the
following
basic
wall
thickness determine By the following formula.


C=1/4(2L+B+H)

Type: C,L,B is respectively for bed length, width and height of size and unit for
the m.

Based on equivalent size c, Consulting relevant form
，
Take the basic wall
thickness is 38mm
，


Figure 2



Shape of concerning the cross-section


Spindle box adopts 300 mm
×

300 mm section design. The torsion bending
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燕山大学本科生毕业设计（论文）




capacity
are
stronger.
Spindle
gearboxes
USES
two
gears
Gear
sliding
speed-change mechanism.
It can adapt rough machining requirements. Spindle unit adopts four supporting
structure,
Ahead
three
groups
of
Angle
contact
ball
bearing
used
to
withstand
cutting
force.
Spindle
end
a
deep
groove
ball
bearings
are
used
to
unloading,
That is not of the Sliding gears of the additional moment.



Longmen framework used integral frame which is fabricated according to the
design concept,
It took
about beam and column design into a whole. Although
make
casting
and
assembly
adjusting
difficulty,
the
whole
framework
of
longmen rigid better, more important is to slide have assembled spindle box, etc.
Slide is designed in the frame which is fabricated according to the geometrical
dimensions and spindle box, According to the center axis of the guide bar as far
as
possible
to
face
for
the
principle,
The
Z
axis
and
the
driver
installation
position in design, effectively reduce the weight of the slide.




Designed to drive into the idea as follows, The X axis to drive
Use
the
bilateral
super-modulus
gear
pair
aggravating
preloading
linear
rolling
guide
vice.X
axis
and
Y
axis
uses
big
diameter
ball
screw
preloading
vice
hardened
guide.
Rail
sliding
parts
attached
engineering
plastics,
It
avoids
low
when
crawling
phenomenon,
and
guide
the
design
is
inclined
with
adjustable
device. This machine design make the whole machine to coordinate performance.
The axis of the feeding speed and force get the optimal matching.




Due to the longitudinal axis machine movement X, and is moving longmen
framework
of
longmen
framework
weighed
10T,

so
the
linear
rolling
guide
rails
to
must
e
the
ball
rail
system
of
small
friction
coefficient,
very suitable for longmen framework of moving rigidity the
slider
choose
one
type,
each
slide
block
dynamic
load
can
achieve
10t.
Considering
the
safety
coefficient,
every
guide
installation
2
slider.
Longmen
framework
for
the
driver
bilateral
super-modulus
gear
pair
(see
chart
2),
feed
movement by 3 input, through two inclined gear motor shaft/and axis to 2, and

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then by two gear
- and to drive rack.
And thus promote longmen framew3 the
helical gear axle spiral of the two opposite directions. Through the spring in the
shaft
on
a
three
axial
force
F,
make
the
helical
gear
trace
of
axial
movement
produced
at
1
and
2
and
axial
shaft
in
the
opposite
direction
Angle
of
small,
round 4 and 5) respectively, the gear tooth surface with two rack, eliminate the
gap.


1.2.3--- axis















4.5--- Rack

Figure 3


Bilateral super-modulus gear pair

Spindle
box
and
vertical
motion
Z
axis
adopts
ball
screw
assembly
transmission. Because of this machine is not high speed milling machine, the Z
axis of the feeding system for servo motor through the ratio of 4 for parallel axis
set than gearbox drives the ball screw rotation. In the design of special attention
to
the
Z
axis
of
safety
problems.
First
choose
the
servo
motor
with
electromagnetic
brake,
second
in
the
ball
screw
with
a
two-way
overrunning
clutch,
prevent
ball
nuts
rotation
caused
spindle
box
mechanical
prolapse.
Of
course, in
order to
protect
the z-axis
feed institutions,
but
also
in
the accuracy
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