Practical Tasks Pneumatics LGD 20402

Small Engines

LGD 20402 Hydraulic & Pneumatic Systems

Practical Task 1aPneumatic

Date:Group:

Task: Provide Technical Report based on pneumatics system, components and functions.

Practical Task 1bPneumatic

Date:Group:

Practical Task 1cPneumatic

Date:Group:


Date:Group:

Task: Single acting cylinder.

Tasks:

1. Build and operate the pneumatic circuit illustrated above.

2. Fully identify (written description) of components 1 & 2.

(A list of words is provided to assist you to complete the description.)

Item 1 is............

............................................................................................

Item 2 is...........................

.......................................................................................................

3. Identify the valve ports.

Port 1 ..............................................................................

Port 2 ...........................................................................

Port 3 ..................................................................................

Supply

Tank

Suction line

Exhaust

Working line

3/2 open DCV

3/2 close DCV

4/3 DCV

Push button

Single Acting Cylinder c/w Spring return Solenoid operatedPractical Task 2bPneumatic

Date:Group:

Task: Simple double acting cylinder

Tasks:

1. Build and operate the pneumatic circuit illustrated above.2. Operate the system by push the buttons and identify the movement of cylinder..3. Identify the cylinder used in the system illustrated above.

.. .Practical Task 2cPneumatic

Date:Group:

Task: 5/2 DCV double acting cylinder

Tasks:


2. Correctly label the 8 valve ports in the boxes providedPractical Task 2dPneumatic

Date:Group:

Task: 5/2 Double acting cylinders.

Tasks:


2. Identify the pneumatic components in the circuit illustrated above.

3. Identify the valve ports

Port 1 ..................................................................................

Port 2 ............................................

Port 3 ........................................................................................

Port 4................................................................

Port 5..........................................................................................

Connection 12 ......................................................

Connection 14 ........................................................- Supply

- Tank

- Suction line

- Exhaust

- Working line

- 5/2 DCV

- 5/2 close DCV

- 4/3 DCV

- Push button

- Spring return

- Solenoid operated

- Pilot line to extend

- Pilot line to retract


Date:Group:

Task: 5/3 Double acting cylinder.

Task:

1. Construct and operate the circuit shown.

2. Label the valve ports on the DCV and identify the components...3. Write a description of the valve.

..

.

.

.

.


Date:Group:

Task: Meter-In Flow Control.

Tasks:

1. Build and operate the Meter-In flow control circuit provided, adjust the supply pressure to approx 300kPa.

2. Complete the table below by entering the pressure readings you observe on both pressure gauges 1 and 2 when the cylinder is extending slowly and also when the cylinder has fully extended.

3. Explain why there is a pressure difference ((P) between the two readings.GaugePressure Readings

Cylinder extending slowlyPressure readings

Cylinder fully extended

#1

#2

Reason/s for the ((P)

..........................................................................................................................

..........................................................................................................................

.....................................................................

..

..Practical Task 3cPneumatic

Date:Group:

Task: Meter-Out Flow Control.

Tasks:

1. Build and operate the Meter-Out flow control circuit provided, adjust the supply pressure to approx 300kPa.

2. Complete the table below by entering the pressure readings you observe on both pressure gauges 1 and 2 when the cylinder is fully extending and also when the cylinder has fully retracted.3. Explain why there is a pressure difference ((P) between the two readings.GaugePressure Readings

Cylinder fully extendedPressure readings

Cylinder fully retracted

#1

#2

Reason/s for the ((P)

..........................................................................................................................

..........................................................................................................................

........................................................................

.


Date:Group:

Task: Meter out Flow Control.

Task:

1. Build and operate the circuit shown.

2. Explain the significance of the system operations.Practical Task 4bPneumatic

Date:Group:

Task: Quick Exhaust Valve.

Tasks:


2. Label all valve ports.

3. Explain the significance of the labels A1 and A0 shown on the DCV

A1 .A0 .4.Explain the function of the component #1

...................................................................................................................

...................................................................................................................

5.Explain the function of the component # 2

..................................................................................................................

.................................................


Date:Group:

Task: Shuttle Valve (Logic OR Function).

Operation:

The cylinder A is to extend if either valves A OR B are actuated The cylinder A is to retract if either valves C OR D are actuatedTasks:


2. If Tee Pieces are used in place of the shuttle valves what do you think would be the likely outcome?

...................................................................................................................

...................................................................................................................

Practical Task 4dPneumatic

Date:Group:

Task: Two Pressure Valve (Logic AND Function).

Operation:

The cylinder A is to extend when both valves A AND B are actuated The cylinder A is to retract when both valves C AND D are actuatedTasks:


2. Re-design and build the circuit to achieve the AND function without using two pressure valves, it is suggested that you use the SERIES AND design.


Date:Group:

Task: Pressure Reducing Valve.

A plastic work-piece is to be clamped in a fixture by a pneumatic cylinder, build the supplied circuit and adjust the pressure reducing valve to 3 Bar to exert a controlled output force on the work-piece.

If the pneumatic cylinder has a diameter of 50mm what force output would you expect if the input pressure is 3 Bar?


Date:Group:

Task: Pressure sequence Valve.

Operation:

1. Actuation of the extend valve will initiate cylinder A extension at a slow velocity.

2. When the cylinder A is extended the pressure on its cap end will increase until the pilot sensing line moves the pressure sequence valve to its open position against the force setting of the adjusting spring.

3. When the pressure sequence valve is open a pilot signal will actuate the 4/2 DCV causing the cylinder B to extend.

4. Actuating the retract valve both cylinders will retract.

Tasks:

1. Build and operate the circuit, adjustment is to be made to the pressure sequence valve to achieve the stated operation given.

2. Label the ports on the pressure sequence valve.Practical Task 6aPneumatic

Date:Group:

Task: Position AND Pressure Sequence Valve.

Operation:

1. Actuation of the extend valve will initiate cylinder A extension at a slow velocity.

2. When the cylinder A is FULLY extended the pressure on its cap end will increase until the pilot sensing line moves the pressure sequence valve to its open position against the force setting of the adjusting spring.

3. When the pressure sequence valve is open a pilot signal will actuate the 4/2 DCV causing the cylinder B to extend.

4. Actuating the retract valve both cylinders will retract.

Tasks:

Complete the circuit drawing, build and operate the circuit, adjustment is to be made to the pressure sequence valve to achieve the stated operation given.Practical Task 6bPneumatic

Date:Group:

Task: Delay On Pneumatic Timer.

Operation:

1. With the cylinder A fully retracted AND actuation of the extend valve, initiation of cylinder A extension will occur.

2. When the cylinder A has reached its full extension position limit valve a1 will be actuated, compressed air will then be supplied to the normally closed timer (at port 1).3. When a pre-determined amount of time (10 seconds) has elapsed the delay-on timer will open and air will pass from port 1 to port 3 to signal the DCV (A0) to shift to retract cylinder A.

Tasks:

1. Label all the valve ports2. Build and operate the circuit, adjustment is to be made to the timer to achieve the 10-second delay.


Date:Group:

Task: Sorting Control.

Operation:

The tested parts are distributed to three conveyors (GOOD/REJECT/REWORK). Shifting to the required positions must be possible in any sequence by push buttons.

Tasks:

1. Identify the push button used for each function above.

2. Change the OR valves to AND valves. Identify the function of push buttons used. Assemble on the work station.Circuit Drawings:

Practical Task 7Pneumatic

Date:Group:

Task: Rotary Indexing Table.

Operation:

Using a rotary indexing table, parts are to be indexed out in sequence to next operation. By pressing a START push button, the rotary table is indexed by oscillating piston rod of a cylinder via a stop pawl. When the STOP push button is pressed, this drive is switched off.

Tasks:

1. Analyse the circuit drawing below and rectify it accordingly to meet the function. Insert the missing line then assemble on the work station.2. Identify and label the START and STOP push button.

Circuit Drawing:


Date:Group:

Mini Project 1: Pneumatic Bus Door.

Task:

You are required to design and construct a pneumatic circuit to ensure that only the bus driver can switch on to open the door when the bus stops to allow the passenger to leave out from the bus. Thus, the combinations of two passengers circuits inside and outside are to be utilised. Incorporate in the design the safety features and other appropriate improvement. Then make a technical report based on final design.


Date:Group:

Mini Project 2: Pneumatic Can Crusher.

Problem Statement:

In a mini recycling plant aluminium cans are to be crushed into a block of space saving storage. The pressing operation is to be triggered by means of a pushbutton. The return stroke can also be actuated by a pushbutton automatically after 10 to 20 seconds to allow for feeding of another box of cans.

Task:

Design a pneumatic system which will crush aluminium cans for the recycling purpose. Incorporate in the design the safety features and other appropriate measures for operator to handle the system safely.

Practical Task 9Pneumatic

Date:Group:

Task: Sequential Circuit

You must construct a pneumatic circuit that performs the following sequence:

Cylinder A goes positive (A+)

Cylinder B goes positive (B+)

Cylinder A goes negative (A-)

Cylinder B goes negative (B-)

The circuit should start with a push button switch.

Use the following schematic diagram to help you. Insert the airlines!

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Practical Tasks Pneumatics LGD 20402

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