head bangers project for 2011 final report

8/6/2019 HEAD BANGERS Project for 2011 Final Report

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HEAD BANGERSFinal report

Compiled by:

Robert Barendilla S209914904

Daniel Basson S2053845

Thanyani Murundwa S209919086

Sanele Mxoli S209404547


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Contentsy Main Objectives....Pg1

y Requirements...Pg1

y Constrains.Pg2

y Concept selection..Pg3

y Parts list.......Pg4

y Price list.......Pg5

y Estimated weights.Pg6

y Materials and calculations.Pg6

y AppendixA-Linear responsibility chart, Gantt chart, Evaluation

matrix, Schedule calendar

y Appendix B-Exploded isometricand 1st/3rdangle drawings

y Appendix C-Minutes of Project plan meeting


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Main objectives;

Students are required to design a vehicle that will compete in a series of races and tests

of durability and endurance. The vehicle will advance down a two meter track and no

external controls or assistance to motion is given to the vehicle once activated. Students

work in groups of four and they delegate the workload according to individual skill set.We will design concepts of the vehicle and compile a final draft of the vehicle based on

constrains as detailed later in the report. This will test the members of the group in the

processes of engineering and designing concepts, material selection and final assembly

of the vehicle.

REQUIREMENTS:

Initial Requirements

- 3 hand sketched vehicle concept drawings

- Evaluation matrix

- Linear Responsibility chart

- Gantt chart

Drawing Requirements

- An explode view isometric assembly drawing is required including the:

1. Body

2. Chassis(motor, battery, switches, gears)3. Wheels

4. All assembly parts to be labeled with assembly number

5. All dimensions and tolerances to be shown of non purchased parts and

purchased parts that have been modified

- Parts list showing the weight each part

- Parts list showing the estimated price of each part

- Drawing views

1. 1st angle drawing of vehicle

2. 3rd angle drawing of vehicle

Calculations

- We are required to estimate the speed of the motor in revs/min by timing a run of

the vehicle


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Constraints:

- Only four or less students are to build a vehicle for the head bangers 2011

project for machine design 2.

- Only one 9-V DC battery can be used for all the races that the team will

participate in.- The vehicle has to race down the race track and back only by a on and off switch

on the vehicle itself.

- The vehicle is to be switched on, move forward, hit the wall, shift from forward to

reverse on its own and race back the track to finish the race.

- The vehicle may not be control by any external controls once the switch on it has

been activated.

- The vehicle must not exceed 300mm in length once it is on the race track.

- The whole vehicle is to be built from bottom to top and no purchased vehicle may

be used as it is, only parts like motors, wheels, small gears may be used into thebuilt vehicle.

- The chassis of the vehicle is to be built as an original and no purchased chassis

may be used.

- Only DC electric motor may be used and more than one motor may be used.

- The vehicle is to be built that it may only move as a single unit.

- No slingshot anchor-type vehicle may be used also a ball that can be thrown

down the race track.


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Parts list

Part Qty Description

Chassis 1 Polyethelene

Bumper 1 Aluminium

Wheels 4 Rubber

Mag wheels 4 Polyethylene

Axel 2 Aluminium

Bearing blocks 2 Polyethylene

Battery 1

Bumper block 1 Polyethylene

ISO 4014 - M3.5 x 20 2 Hexagon head bolt - Product grades A and B

ISO 4014 - M2.5 x 20 8 Hexagon head bolt - Product grades A and B

ISO 4032 - M3.5 2 Hexagon nuts, style 1 - Product grades A and B

ISO 4032 - M2.5 8 Hexagon nuts, style 1 - Product grades A and B

Switch stand(Toggle) 1 Aluminium

Switch-stand(On/off) 1 Aluminium

Toggle switch 1

On/off switch 1


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Price list

Combined costs Of Vehicle (Rands)

Motor R128.95

Batteries R45.95

Complete chassis manufacturing cost R345.00

Wheels R60

Toggle Switch R80

On/off Switch R20

Gear Train R105

Total R784.90

Price paid by Each Member of the group R196.25

y Prices Quoted from The RC SHOPAt 6th

Avenue Walmer Shopping centre


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Car weights

Actual weight of car 2.0kg

Estimated weight of parts

Chassis(Including all polyurethane parts) 0.9kg

Wheels 0.2kg

Axle(shafts) 0.1kg

Electrical mechanisms(switches, wires) 0.3kg

Gearbox and motor 0.5kg

Materials used

Chassis, blocks Polyurethane

Bumper, shaft Aluminium

Wheels Rubber

Calculations

We ran the car over a 5 meter length and timed it to 2.35 seconds. We calculated

the linear speed of the car to be 2.13 m/s.

V =

V =

= 2.13 m/2


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Wheel diameter 0.046m

=

=

= 92.61 rad/s

=

N =

=

= 884.36rpm(wheels)

VR =

=

= 1.714

RPM motor = RPM wheel x VR

= 884.36 x 1.714

= 1515.79 rpm


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Appendix BCharts

Linear Responsibility ChartNo Tasks Danie Robert Sanele Thanyani

1.0 Management

1.1 Overall leadership 1 2 3 3

1.2 Team meeting minutes 1 3 3 2

1.3 Financial accounts 1 2

2.0 Procurement

2.1 Motor 3 1 2 3

2.2 Gears 3 3 1 22.3 Chassis 2 3 3 1

4.0 Electrical

4.1 Circuit design 3 1 3 1

4.1.1 Build and test circuit 2 1 3 3

4.2 Add circuit to chassis 1 2 3 3

5.0 Drawings

5.1 Concept sketches 3 1 2 3

5.2 Initial 3D drawing 3 3 1 2

5.3 Final drawing 3 3 1 2

5.3.1 Individual parts 3 3 2 1

5.3.2 Scenes, 3D isometric 3 1 3 2

5.3.3 Parts list 3 2 1 3

6.0 Construction

6.1 Build chassis 1 2 3 3

6.2 Assemble drive train 3 2 3 1

6.3 Assemble electronics 3 3 1 2

7.0 Testing7.1 Test assembled car 1 3 2 3

7.2 Modify and re-test 3 2 3 1

8.0 Final report 1 1 1 1

1. Primary responsibility 2. Secondary responsibility 3. Review

Changes to chart


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Appendix CMinutes of Project plan

meeting

1st REPORT Minutes

Agenda/Subject: Head bangers meeting regarding first practical report.

Date : 25 February 2011

Time : 12:30

Attendees: Robert Barendilla, Thanyani Murundwa, Danie Basson, Sanele Mxoli

To ensure that all the requirements of the first report could be met. It was decided that

each team member must free hand sketch a chassis of a battery operated vehicle. This

drawing must show all relevant parts of the vehicle such as drive train, motor, wheels

and switches based on their own individuals designs and concepts. Three of the four

chassis design concepts will be used for the first report.

The following tasks were handed out to the relevant team members. They are as

follows:

y Robert Barendilla :The requirements section for the report and the responsibility

chart,y Thanyani Murundwa : The constrained section.

y Danie Basson: Gantt chart and Minutes.

y Sanele Mxoli: Objectives and Evaluation matrix.

Conclusion

All relevant team members must hand in their tasks on the 02March 2011


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2nd REPORT MINUTES

Agenda/Subject: Head bangers meeting regarding second practical report.

Date: 22 March 2011

Time: 12:25

Attendees: Robert Barendilla, Thanyani Murundwa, Danie Basson, Sanele Mxoli

What we as group 5 agreed upon is that every member must make a chart that are

required for the second report. Each group member was given a week to make sure that

the task that they had to do, Should be done in the correct manner. Also every member

within the group must make sure that they bring their work at the team meeting that

followed.

The following tasks were handed out to the relevant team members. They are as

follows:

y Robert Barendilla Linear responsibility chart,

y Thanyani Murundwa: Calendar, Meeting Minutes.

y Danie Basson: Gantt chart.

y Sanele Mxoli: Price list and evaluation matrix.

Conclusion

All relevant team members must hand in their tasks on the 22 March 2011


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head bangers project for 2011 final report

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