(week 8) pneumatics components and circuit design
TRANSCRIPT
7/23/2019 (Week 8) Pneumatics Components and Circuit Design
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Pneumatics
7/23/2019 (Week 8) Pneumatics Components and Circuit Design
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Pneumatic power unit andapplication
Portable power unit Impact wrench
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COMPONEN TS
Power
components(Actuators)
Compressor Valves
Air generationdistribution
(piping)
Others: Receivers, flters, etc
otor
Airtan!
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Compressor
Compressed air suppl": #eliver"
Air reservoir
ppl" ta!en %rom top o% ring m
ain
&ntermediate reservoir
$ervice unit
Condensatecollector tan!
Reservoir within a pneumatic s"ste
' * gradient
Consumingdevices
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Compressor flls the reservoir – asstorage tank
Pipeline is installe with a graient o!
" to # $ Conensate removal are installeuner the main pipeline
'+ Air generation anddistribution
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%unction& Control the pressure or 'owrate o! pressure meia
Categories&
◦ (irectional control valves◦ Non)return valves◦ %low control valves◦
Pressure control valves◦ Shut)o* valves
+ Valves
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- .a" Valve ) " Input +suppl,-. "Output +/orking 0ine- an " E1haust
#irectional control valves'
2
1 3
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2pplications&
"-2s input signal+pushbutton.
limit switch.emergenc,button-
#-To controlSingle 2ctingC,liner
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/- .a" Valve with " Input+suppl,-. # Output +/orking 0ine-an # E1haust
#irectional control valves
4 2
5
1
3
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2pplication&
) Controlmovement o!
(ouble2ctingC,liner
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ISO
3344)5
0ettering
S,stem
Port
" P Pressureport
#. 6 2. 7 /orkinglines
5. 3 8. S E1haust
ports
Valves numbering s"stem
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0onReturn Valves (OR$huttleValve)
1 1
2
• # input an "output
• 2llow a signal to'ow in one irection
• Output is ac9uire
i! one +or both- o!input suppl, pressure
• %or circuit with
more than " input
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1 1
2
0onReturn Valves A0#(1wo Pressure Valve)
•# input an " output
•Output onl, ac9uire i!both input supplie withpressure
•%or circuit with more than" input signal
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2low Control Valve 3 One .a"2low Control
100%
" input an "output:
To reucespee o!
pistonmovement+a;ustable-
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0onReturn Valves 4uic!56haust Valve
1
2
3
•" input. " outputan " e1haust
• To increase speeo! piston movement
+but not a;ustable-
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Consists o! control elements <actuators
0inear actuator Single acting c,liner (ouble acting c,liner
8otar, actuator 2ir motors
+ Power components
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7ase on &
◦ =nerstaning the problem b,consiering t,pe an 9uantit, o!
components◦ Number o! process>
> Each process is represente b, onec,liner +actuator-
#evelopment o% Pneumatics$"stem
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=nerstan the problem step b,step&
◦ Ienti!, t,pe o! c,liner
◦ Ienti!, the right control valve !orselecte c,liner
◦ Ienti!, methos to start the
operation◦ Ienti!, methos to stop the
operation
◦
Ienti!, other parameters +i!
#evelopment o% Pneumatics$"stem
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SIN?0E
2CT=2TO8 CI8C=ITS
#irect control
&ndirect control
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1he circuit design
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2ctuate irectl, via mechanical valve.without intermeiate switching
0imits& "- Piston iameter @ 6A mm #- Balve with connection sie @ "D6
I! not mentione. use inirect control E1ample& 2 single c,liner o! #3 mm in iameter is to
clamp a component when a push button is
presse: 2s push button is activate. thec,liner is to remain in the clamp position: I!the push button is release. the clamp is toretract:
#irect control
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Solution&◦ Ienti!, t,pe o! c,liner Single acting with spring return
◦ Ienti!, right control valve !or selecte c,liner
5D# wa, valve +!or single acting-◦ Ienti!, methos to start the operation Push button +5D# wa, with spring-
◦ Ienti!, methos to stop the operation
Push button +release the start button-◦ Ienti!, others parameter +i! neee- NI0
$olve problems
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1he circuit design
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=se when the !orce shoul prove too high!or
manual actuation o! valve +!or large pistoniameter-
Signal is generate via smaller valve
E1ample& 2 single c,liner with a large piston
iameter. is to clamp a workpiece!ollowing actuation o! a push button: Thec,liner is retract once the push button isrelease:
&ndirect control
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$ingle Acting C"linder (-wa")
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Solution&◦ Ienti!, t,pe o! c,liner Single acting with spring return
◦ Ienti!, right control valve !or selectec,liner 5D# wa, valve +!or single acting-
◦ Ienti!, methos to start the operation Push button +5D# wa, with spring- activate
control valve◦
Ienti!, methos to stop the operation Push button +release the start button-◦ Ienti!, others parameter +i! neee- NI0
$olve problems
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$ingle Acting C"linder (-wa")
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#ouble Acting C"linder (/-wa")
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E1ample◦ 2 ouble acting c,liner is to avance i!
one o! two push buttons is operate: I!
the push button is release. the c,lineris to retract:
7ogic OR %unction
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7ogic OR %unction circuit
Roller lever valve actuated
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7ogic OR %unction circuit
Push button valve actuated 8oth valves actuated
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E1ample◦ The piston ro o! (2C is to avance
when the 5D#)wa, roller lever valve 2N(
the push button o! 5D#)wa, valve areactuate: I! either o! these are release.then the c,liner will return to its initialposition:
7ogic A0# %unction
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7ogic A0# %unction circuit
Roller lever valve actuated Push button valve actuated
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7ogic A0# %unction circuit
8oth valves actuated
.here isthe logicin these
7ogiccircuits9
o to:
http:--www+logiclab+hu-inde6+php
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E1ample◦ Clamping o! a rilling machine starts when oneo! two push buttons is presse an it isrelease when the thir push button is presse:
◦ Parameters There is no clamping i! the workpiece is not inthe position:
Clamping evice cannot be opene uring the
rilling in operation: Clamping process must be per!orme slowl,:
Clamp opening must be per!orme rapil,:
Combination o% A0# ; OR7ogic
DS
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F=0
4 2
5
1
31 1
2
1 1
2
2
1 3
WS
2
1 3
2
1 3
1 1
2
2
1 3
2
1 3
DS
F=0
2
1 3
DSWS
3 5 %
1
2
3
Start A Start BStop Drill Sensor
Workpiece Sensor
DRILL M!!LAM" M!
to: http:--www+logiclab+hu-inde6+p
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#evelopment o%#ouble Actuator
Circuit
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(efne motions o! all actuators (ivie se9uence into groups (etermine limit switch status Ienti!, number o! connecting line
+ F number o! groups- Ienti!, number o! reversing valve
+ F number o! groups – "-
Control o% ultipleActuator
l % l i l
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E1ample◦ 2 pneumatic actuate
rilling machine. containeo! two (2C: /hen theworkpiece is locate at it
position. c,liner 2 willclamp the workpiece: Then. the rilling processis starte. where thespinle is controlle b,c,liner 7: 2!ter fnishrilling. c,liner 7 willretract to the initialposition. be!ore theclamping c,liner retract:
Control o% ultipleActuator
C l % l i l
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": (efne motion
2G 7G 7) 2)
#: ?roups
2G 7G 7) 2)
Control o% ultipleActuator
H "
H#
C l % l i l
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Control o% ultipleActuator5: 0imit switch status
2G 7G 7) 2)
Start
2"
7"
7A
2A
2bove
7elow
C l % l i l
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6: Number o! connecting lineF number o! groups
F #
3: Number o! reversing valve
F number o! groups – " F "
Control o% ultipleActuator
d i i
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Mechanical sensor. initial position
2ctivate position
&ntroduction to pneumaticsensor
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#rawing basic circuit
#connecti
ng lines
"
reversingvalve
C t l % lti l A t t
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Control o% ultiple Actuator
2G Start G2A
C t l % lti l A t t
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Control o% ultiple Actuator
7G
2"
C t l % lti l A t t
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Control o% ultiple Actuator
7)
7"
C t l % lti l A t t
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Control o% ultiple Actuator
2)
7A
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C i % i l
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Connection o% singlereversing valve
4 2
5
1
3
14 12
0 #
C ti % d bl
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4 2
5
1
3
14 12
4 2
5
1
3
14 12
0#$
0#5
Connection o% doublereversing valve
Connection o% triple
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Connection o% triplereversing valve