Ejercicios y Soluicones de Neumatica 16

Innovation Team – Approved Course Resources P111 – Introduction to Pneumatics - Solutions

PM - Training and Consulting

Description: Innovation Team – Approved Course Resources – P111 – Solutions Edition: v1.0 (10/03) Editors: Martin Williams, David Hoey Resources: Festo Companies, Product Management – Training and Consulting © Festo Didactic GmbH & Co. KG, 73770 Denkendorf/Germany, 2003 Internet: www.festo.com/didactic E-mail: [email protected] The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved, in particular the right to carry out patent, utility model or ornamental design registration.

2 © Festo Didactic GmbH & Co. KG • Innovation Team – Approved Course Resources P111 – Sol.

Contents

P111 – Introduction to Pneumatics – Exercises & Solutions Exercise 1 ___________________________________________________________ 4 Exercise 2 ___________________________________________________________ 8 Exercise 3 __________________________________________________________ 11 Exercise 4 __________________________________________________________ 14 Exercise 5 __________________________________________________________ 17 Exercise 6 __________________________________________________________ 20 Exercise 7 __________________________________________________________ 24 Exercise 8 __________________________________________________________ 28 Exercise 9 __________________________________________________________ 31 Exercise 10__________________________________________________________ 35 Exercise 11__________________________________________________________ 39 Exercise 12__________________________________________________________ 42 Exercise 13__________________________________________________________ 46 Exercise 14__________________________________________________________ 50 Exercise 15__________________________________________________________ 54 Exercise 16__________________________________________________________ 58

© Festo Didactic GmbH & Co. KG • Innovation Team – Approved Course Resources P111 – Sol. 3

Exercise 1

Exercise 1 Direct Control of a Single-Acting Cylinder

Problem Description The allocating device supplies aluminium valve blanks to a machining station. By operating a push button, the piston rod of the single-acting cylinder (1.0) is made to advance. After releasing the actuating button, the piston rod returns.

Quantity Description Symbol

1 Single acting cylinder

1 Push button actuated, spring return, normally

closed, 3/2 directional control valve 2

1 3

Equipment list


Exercise 1

Solution: Exercise 1

2

31


Exercise 2

Exercise 2 Direct Control of a Double-Acting Cylinder

Problem Description With the help of the vertical switching point, soft cool (ignite) briquettes are to be fed to an upper or lower conveyor, according to the selection. The destination of the swivelling slide (upper or lower) is decided by means of a valve with selector switch.


1 Double acting cylinder

1 Selector switch actuated, spring return, detented,

5/2 directional control valve 4 2

31

5

Equipment list


Exercise 2


2

31

4

5


Exercise 3

Exercise 3 Indirect Control of a Double-Acting Cylinder

Problem Description Press fit bushings are to be removed from steel blocks using a double acting cylinder. The start signal is to be given using a push button; when the push button is released, the cylinder returns to its initial position. The cylinder diameter is 160mm and the stroke is 100mm.



1 Selector switch actuated, spring return, detented,

5/2 directional control valve 4 2

31

5



1 3

Equipment list


Exercise 3


2

31

4

5

31

2


Exercise 4

Exercise 4 Memory Control of a Double-Acting Cylinder

Problem Description The roller track is to be swivelled by means of a double acting cylinder. The signals to extend and to retract are given from separate push buttons. The cylinder is to remain in the in the position indicated by the last signal until an opposing signal is given.



1 Double air actuated, 5/2 directional control valve 4 2

31

5

14 12


closed, 3/2 directional control valve

2

1 3

Equipment list


Exercise 4


2

31

4

5

31

2

1 3

2

1214


Exercise 5

Exercise 5 Automatic Return using Limit Switch

Problem Description Using a double acting cylinder, a part is to be moved from one roller track to another. The operation is to be started using a push button. An acknowledgement signal is required when the piston is fully extended to ensure that the part has been transfered. The return stroke is to be automatic.

1A




31

5

14 12



1 3

1 Roller lever actuated, spring return, normally

closed, 3/2 directional controlvalve

2

31

Equipment list


Exercise 5


2

31

4

5

31

2

1 3

2

1.3

1.31.2

1.1

1.0

1214


Exercise 6

Exercise 6 “OR” Function

Problem Description Production parts are moved by an actuator towards a measuring machine. Two push buttons are to be incorporated in the circuit. When either of these is actuated, parts are to be fed. The return stroke is initiated by the actuator after it reaches the end of the forward rotation.




31

5

14 12



1 3



31

Equipment list


Exercise 6

1 “OR” gate (Shuttle valve) A X Y


Exercise 6


2

31

4

5

31

2

1 3

2

1.3

1.31.2

1.1

1.0

1214

31

21.4

1.6

12 10

2


Exercise 7

Exercise 7 “AND” Function

Problem Description In an assembly station, parts are to be put together. The process can only start when a push button is pressed and a workpiece is present. The cylinder will remain in the forward position and only return if a second push button is pressed and a limit switch indicates that the cylinder is in the forward position.

1A




31

5

14 12



1 3

Equipment list


Exercise 7



2

31

1 “AND” gate (Two-pressure valve)

A X Y


Exercise 7


2

31

4

5

31

2

1 3

21.5

1.2

1.1

1.0

1214

31

21.4

1.6

12 10

2

1 3

2 1.3

W/P


Exercise 8

Exercise 8 Speed Regulation

Problem Description The forward and return strokes of the cylinder are to be controlled by separate push buttons. The speed of forward and return strokes is to be slow and separately adjustable. The cylinder diameter is 50mm and it has a 160mm.




31

5

14 12



1 3

2 One-way adjustable flow control valve

Equipment list


Exercise 8


2

31

4

5

31

2

1 3

2

1214

1.03 1.02

1.0

1.1

1.2 1.3


Exercise 9

Exercise 9 “OR” / “AND” / Speed Control

Problem Description The clamping of a workpiece is to be controlled by either of two push buttons. A third push button is to release the clamp. Additional Conditions : • The clamp can be released only when the drill is fully up. • The clamping speed is to be slow and adjustable. • Unclamping is to be very fast.




31

5

14 12



2

1 3



1 3


A X Y

Equipment list


Exercise 9


1 Quick exhaust valve A P R



Exercise 9


4 2

31

5

14 12

2

31

1.3

1.1

1.0

2

1 3

1.2

1.6 AX Y

1.52

1 3

Drill

AX Y

2

1 3

1.4

1.7

AP R


Exercise 10

Exercise 10 Adjustable Force

Problem Description A double acting cylinder is to used to emboss a part. The cylinder may be extended only when the part is present and either one of two push buttons is actuated. The extend stroke is to be slow and adjustable. The return stroke of the cylinder is to occur automatically after the forward end position and the preset pressure have been reached. Note : The position of the one-way flow control valve in the circuit will affect the operation of the sequence valve.




31

5

14 12



2

1 3

Equipment list


Exercise 10



2

31


A X Y



1 Pressure sequence valve


Exercise 10


2

1 3

2

1 3

1.51.2

1.1

1.0

1 12

1.4

1.6

1.3

W/P

1 121.7

1.02

2

1 3

1.8

2

12 1

3

1.5

2

1 3

4 2

1

14 12

5 3


Exercise 11

Exercise 11 Adjustable Force with Pressure Regulator

Problem Description A clamp is to hold assorted parts of different materials. The clamping force must be adjustable and rapid declamping is also required. Clamping and declamping will be initiated by separate push buttons.




31

5

14 12



1 3


1 Pressure regulator

Equipment list


Exercise 11


2

31

4

5

31

2

1 3

2

1214

1.03

1.02

1.0

1.1

1.2 1.3


Exercise 12

Exercise 12 Timer Functions

Problem Description A push button is to control the forward stroke. After the piston has reached the forward end position, the components are to be pressed together for twenty seconds. The piston rod is to return automatically to the initial position.

1A



1 Double air actuated, 5/2 directional

control valve 4 2

31

5

14 12

1 Push button actuated, spring return,

normally closed, 3/2 directional

control valve

2

1 3

1 Roller lever actuated, spring return,

normally closed, 3/2 directional

control valve

2

31

Equipment list


Exercise 12

1 Delay On Timer


Exercise 12


2

31

4

5

31

2

1 3

2

1214

1.5

1.0

1.1

1.2 1.3

1.3

Z

P

A


Exercise 13

Exercise 13 Two Cylinders Motion with Sequence Valve

Problem Description After two parts have been inserted in a fixture, the clamping cylinder is to reach a given clamping pressure. Then a second cylinder is to extend, riveting the parts. The riveting cylinder and the clamping cylinder should react at the same time. Clamping and declamping are to be controlled by separate push buttons. The extension and retraction speed of the clamping cylinder is to be separately adjustable. The riveting cylinder must extend rapidly. Note : It is important that the signal to the sequence valve is taken from the correct location; otherwise the system will not operate properly.



Equipment list


Exercise 13

1 Double air actuated, 5/2 directional control

valve 4 2

31

5

14 12

1 Single air actuated, 5/2 directional control

valve



1 3



1 Pressure sequence valve


Exercise 13


2

3 1

4

5

31

2

1214

31

2

1424

35


Exercise 14

Exercise 14 Co-ordinated Motion Control

Problem Description Two cylinders are used to transfer parts from a magazine onto a chute. When a push button is pressed, cylinder 1.0 extends, pushing the part from the magazine and positions it in preparation for transfer by cylinder 2.0 onto the outfeed chute. Once the part is transferred, the first cylinder retracts followed by the second. The speeds of both cylinders are to be adjustable. Confirmation of all extended and retracted positions is required.

1A

2A




31

5

14 12

Equipment list


Exercise 14

4 Roller actuated, spring return, normally closed, 3/2

directional control valve

2

31



1 3



Exercise 14


2

3

4

5

31

2

1214

31

2

31

2

B0

2

3

4

5

1214

31

2

A0

31

2

A0 A1 B0 B1

B1

B0

A1 A0


Exercise 15

Exercise 15 Signal Overlap

Problem Description In co-ordinated motion control, the 5/2 way memory valve can only switch positions when a single point signal is present. If two signals are operated simultaneously, i.e. both pilot signals on the 5/2 way valve are active, a signal overlap problem occurs. Parts are manually placed in an embossing machine. The parts are moved into position by a pneumatic cylinder. A second cylinder embosses the part and returns. After the embossing cylinder retracts, the feed cylinder returns. Design the circuit using the Cascade method.




31

5

14 12

Equipment list


Exercise 15



2

1 3



31



Exercise 15


1.3 2.3

2.2

1.4 2.2

1.3

2.31.4


Exercise 16

Exercise 16 Using Reversing Valves

Problem Description Using a transfer station, parts are to be transferred from a vertical magazine to a processing station. The parts are pushed by Cylinder 1.0 and then transferred onto a chute by Cylinder 2.0 for transfer to the processing station. The piston rod of Cylinder 2.0 is only to retract after confirmation that Cylinder 1.0 has fully retracted. The cycle is to start when a Start button is pressed. Limit switches are used to confirm cylinder positions.


Exercise 16

Workspace In the space provided below, draw a pneumatic circuit diagram for the problem in this exercise using ISO symbols and connecting the ports with solid lines. The diagram is to be used to construct the circuit on the training board.


Exercise 16



Ejercicios y Soluicones de Neumatica 16

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