(Week 8) Pneumatics Components and Circuit Design

7/23/2019 (Week 8) Pneumatics Components and Circuit Design

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Pneumatics



Pneumatic power unit andapplication

Portable power unit Impact wrench



COMPONEN TS

Power

components(Actuators)

Compressor Valves

Air generationdistribution

(piping)

Others: Receivers, flters, etc

otor

Airtan!



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



Compressor flls the reservoir – asstorage tank

Pipeline is installe with a graient o!

" to # $ Conensate removal are installeuner the main pipeline

'+ Air generation anddistribution



%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



- .a" Valve ) " Input +suppl,-. "Output +/orking 0ine- an " E1haust

#irectional control valves'

2

1 3



2pplications&

"-2s input signal+pushbutton.

limit switch.emergenc,button-

#-To controlSingle 2ctingC,liner



/- .a" Valve with " Input+suppl,-. # Output +/orking 0ine-an # E1haust

#irectional control valves

4 2

5

1

3



2pplication&

) Controlmovement o!

(ouble2ctingC,liner



ISO

3344)5

0ettering

S,stem

Port

" P Pressureport

#. 6 2. 7 /orkinglines

5. 3 8. S E1haust

ports

Valves numbering s"stem



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



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



2low Control Valve 3 One .a"2low Control

100%

" input an "output:

To reucespee o!

pistonmovement+a;ustable-



0onReturn Valves 4uic!56haust Valve

1

2

3

•" input. " outputan " e1haust

• To increase speeo! piston movement

+but not a;ustable-



Consists o! control elements <actuators

0inear actuator Single acting c,liner (ouble acting c,liner

8otar, actuator 2ir motors

+ Power components



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



=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



SIN?0E

2CT=2TO8 CI8C=ITS

#irect control

&ndirect control



1he circuit design



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



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



1he circuit design



=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



$ingle Acting C"linder (-wa")



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



$ingle Acting C"linder (-wa")



#ouble Acting C"linder (/-wa")



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



7ogic OR %unction circuit

Roller lever valve actuated



7ogic OR %unction circuit

Push button valve actuated 8oth valves actuated



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



7ogic A0# %unction circuit

Roller lever valve actuated Push button valve actuated



7ogic A0# %unction circuit

8oth valves actuated

.here isthe logicin these

7ogiccircuits9

o to:

http:--www+logiclab+hu-inde6+php



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



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



#evelopment o%#ouble Actuator

Circuit



(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



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:


C l % l i l



": (efne motion

2G 7G 7) 2)

#: ?roups

2G 7G 7) 2)


H "

H#

C l % l i l



Control o% ultipleActuator5: 0imit switch status

2G 7G 7) 2)

Start

2"

7"

7A

2A

2bove

7elow

C l % l i l



6: Number o! connecting lineF number o! groups

F #

3: Number o! reversing valve

F number o! groups – " F "


d i i



Mechanical sensor. initial position

2ctivate position

&ntroduction to pneumaticsensor



#rawing basic circuit

#connecti

ng lines

"

reversingvalve

C t l % lti l A t t



Control o% ultiple Actuator

2G Start G2A

C t l % lti l A t t




7G

2"

C t l % lti l A t t




7)

7"

C t l % lti l A t t




2)

7A



C i % i l



Connection o% singlereversing valve

4 2

5

1

3

14 12

0 #

C ti % d bl



4 2

5

1

3

14 12

4 2

5

1

3

14 12

0#$

0#5

Connection o% doublereversing valve

Connection o% triple



Connection o% triplereversing valve



50# O2 75C1<R5

(Week 8) Pneumatics Components and Circuit Design

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