Report for "An alternative to sickle"

Creative Engineering Design
Conceptual
Design Report
An alternative to sickle
By “Big Bang” team
INHA University in Tashkent
8th of March

“Big Bang”
Team
Abdufattokhov Javokhir
Akhrorov Islomkhuja
Sobirov Islom
Numonov Akromjon
Nasrulloev Rustam
Zokirov Farrukhbek (Leader)

ABSTRACT
This report outlines a conceptual design of an alternative
to sickle. The new product does not exist in the market,
but one can simply call it “mechanical version of lawn
mower”. The product that designed consists of 2 vehicles
which help to rotate the brush cutter blade via
mechanism. The new product has many advantages over
human energy consumption, convenience and power
consumption. The conceptual design of this product can
be a good example of an Appropriate technology because
it can be used in rural areas efficiently by local residents.
This technology might be potential future product
because it can be generated by local materials, this
ensures that in case of breaking down, it can be
reconstructed with local materials.

CONTENTS
ABSTRACT......................................................................... 3
CONTENT.......................................................................... 4
INTRODUCTION ............................................................... 5
New Developments and Principal Results Achieved…………
......................................................................................... 6
Structure of Report ......................................................... 6
Gantt Chart ...................................................................... 7
Survey Results ................................................................. 8
Design Variables .............................................................. 9
Quality Function Deployment ....................................... 10
Organization of design process……………………………………11
Conceptual Design …………………. ................................... 11
Decision-Making Matrix ................................................ 14
Final Design ................................................................... 21
Evaluation…………………................................................... 22
Conclusion ..................................................................... 23
Acknowledgments.......................................................... 24
REFERENCES .................................................................. 25

INTRODUCTION
A sickle which is known as bagging hook and reaping-
hook. It an agricultural tool invented and designed for
harvesting, reaping, graining crops and cutting succulent
forage for feeding livestock with fresh or dried hay. In the
past, a sickle had a significant positive impact on the
agricultural revolution. It helped a lot to farming and
other spheres in rural areas. If we look to the history of a
sickle, one can know that it is discovered in north
America with unique structure. From this moment, the
people used to utilize the sickle in their daily life. Even
today many people depended on the sickle to work
effectively in countryside.
The main target of this report is to find a number of
solutions to the problems which are occurred while using
the sickle. Many consumers complained that when they
used the sickle, they faced some difficulties like human
energy consumption, Convenience, power consumption
and tidiness.

New Developments and Principal Results Achieved
The Team came up with four conceptual designs which are obtained by
analyzing the QFD. According to the Decision-Making Matrix, we chose
one of the conceptual designs, which can be potential future product.
Structure of Report
The structure of our report:
1. Gantt Chart
2. Customer Complaints and Requirements
3. Design Variables
4. Quality Function Deployment (QFD)
5. Conceptual Design
6. Decision-Making Matrix
7. Final Design
8. Evaluation

Gantt Chart
Figure 1
Conceptual design of project lasted twelve days, and there were nine meetings
with team members.
Survey Results
COLECTED VOICE OF CUSTOMERS

1. Dangerous to use
2. Too much effort needed
3. Grass is mixed up while mowing
4. Consumes too much energy
5. Cannot be worked with it for hours
6. It is not comfortable for everybody
7. It is not automated equipment
8. Sharpness do not last long
9. Uncomfortable for left-handed people
10. Can be rusted if not used frequently
Customer Requirements
❖ It has to be safe for everyone(C1)
❖ Consumers should make less effort(C2)
❖ Grass needs to be collected and organized(C3)
❖ It does not have to be exhausting(C4)
❖ Want it to be worked for hours(C5)
❖ Everybody could be able to use it(C6)
❖ It should work itself(C7)
❖ Sharpness has to last as long as possible(C8)
❖ It can be used by both hands(C9)
❖ Need to be avoided from rusting(C10)
Optimal Solutions
✓ Make protector for its cutter(C1)
✓ Change its shape to reduce amount of work(C2)
✓ Make it controllable by switching the handle’s size(C3)
✓ Redesign the sickle so it can mechanically mow the grass(C4)
✓ Mows the grass without damaging its root(C5)
✓ Redesign the sickle so it adopts function of bicycle in order to cut
grass(C6)

✓ Alternative to sickle that cut the grass with help of engine which is
charged by solar panel(C7)
✓ Change the type of metal (C8)
✓ Redesign the sickle so it can be used with both hands equally(C9)
✓ Make a special box(C10)
Design Variables
1. Noise: It ought to sound lower
2. Power consumption: It should not consume power
3. Weight: Its weight needs to be light
4. Convenience: One should not feel difficulty when utilizing it
5. Safety: Redesign its shape again in order to come up with the new
version that ensure users’ safety
6. Human energy consumption: Customer must not make a lot of
effort while using it
7. Maintenance: It needs to service for a long
8. Tidiness: While operating, it should work clean

According to the QFD, four Design and Customer Requirements have
higher priorities:
Customer Requirements
C3 - Grass needs to be collected and organized
C4 - It does not have to be exhausting
C6 – Everybody could be able to use it
C7 – It should work itself
Design Requirements
Power consumption
Convenience
Human energy consumption

Tidiness
Organization
Before starting with the conceptual design and Decision-making matrix
part, the team came up to organize procedure of whole conceptual
design and its cycles. In order to avoid ambiguity, the team decided to
show the hierarchy of the whole conceptual design and decision-
making matrix process beforehand.
Conceptual Design
In general meeting, when the team started to generate ideas, one of
our team members suggested a number of different ideas related to
the four design requirements. These ideas helped us when we finalized
the QFD analysis because in QFD analysis, these four design
requirements helped us to come up with a number of creative ideas in
manner of minutes.
Afterwards, we came up with four conceptual designs:
1. Regulated sickle

2. An alternative to sickle which is mechanical mower
3. An alternative to sickle which is lawnmower bike
4. An alternative to sickle which is solar powered
Regulated Sickle
Mechanical mower

Lawnmower bike

Solar Powered
Decision-Making Matrix
The team decided to make decision-making Matrix according to the
Harris Profile. During this process, the team tried to make more and
more cycles, but taking into account of our limited time and avoiding
not productive working, we decided to make cycles as much as
possible. And finally, when we finalized our last cycle, we recognized
that we went through three cycles in which second and third cycles had
sub-cycles. We needed sub-cycles because we improved two different
parts of our products simultaneously.
First Cycle
In the first cycle, we evaluated four conceptual designs namely
Regulated sickle, mechanical mower, Lawnmower bike and Solar
powered mower.

After analyzing the first cycle, it became clear that mechanical mower
had higher priority than other three designs.
Next, the team decided to improve the quality of the chosen product
which is mechanical mower in the second and third cycles
simultaneously. The reason for this that second and third cycles
develop two different parts of the designing product.
In the second cycle, the team created three sub-cycles in this cycle only
in order to improve the blade of mechanical mower to the better side.

According to the “Harris Profile”, in the second cycle’s in the first sub-
cycle, blade which is placed diagonally had higher priorities.
In the second cycle’s in the second sub-cycle, the team decided to
choose the shape of blade from three different cutters like starry,
straight and cylindrical.

According to the “Harris Profile”, in the second cycle’s in the second
sub-cycle, cylindrical blade had the highest priority because of a
number of reasons.

In the second cycle’s in the third sub-cycle, the team decided to choose
the type of the blade in the cylindrical part namely ordinary blade,
curved blade and toothed blade.
According to the “Harris Profile”, in the second cycle’s in the second
sub-cycle, the curved blade got the highest priority among others.

Finally, we came to the last cycle which includes two sub-cycles. In this
cycle, the team tried to place the bags of mechanical mower in a way
that the best suits to the mechanical mower and shows the most
efficient way of organizing it.
According to the “Harris Profile”, in the third cycle’s in the first sub-
cycle, mesh bag had the highest priority among three diverse parts of
mechanical mower.

In the third cycle’s in the second sub-cycle, the team decided to
evaluate the settings and position of mesh bag in order to come up
with the final design.
According to the “Harris Profile”, in the third cycle’s in the second sub-
cycle, the mesh bag in the condition of looseness had the highest
priority.

Final Design
First of all, the picture above is drawn for the final design, but the team
rejected it because it did not have the features which we invented.
There was nothing visible from that picture, for example how it
operates and how its balloon connected to the mechanism. And
nobody can call it mechanical mower because of bad organization its
parts.
Moreover, it did not have any bags which helped to carry the plants
and grasses which are cut by cylindrical blade. And, its cutter was not in
the shape of cylinder.
However, out next sketch included all of these features and
corresponded our parts from the three cycles with their sub-cycles. This
machine not only cuts the blade but it also able to collect the grasses
and plants simultaneously after cutting. The above balloon is drawn for

illustrating how the mechanical mower operates by showing the
mechanics inside it.
The final design of our product is completed after going through so
many stages from Gantt Chart to Evaluation. After analyzing the all
processes, our team decided to give the name of our product as a “An
alternative to sickle”.
Our future product has benefits over a number of features namely
power consumption, convenience, human power consumption and
tidiness. The Conceptual design of our future product can be one
example of potential future Product. The team’s new products can be a
good example of an Appropriate technology.
Evaluation
Let’s talk about the quality of evaluation. Followings are the qualities which were
improved and what parts left untouched.

1. Let’s begin with human energy consumption, the reason for this is that it is the
most important part. I believe that its undoubtedly advantageous compared to
ordinary sickle.
2. Without a doubt, safety will be highly appreciated by customers because much
safer to work with lawn-mower rather than reap.
3. Furthermore, maintenance it left the same old and new product they serve
long period. That’s why one cannot say it was improved.
4. Next, convenience after new product will be created. More people may prefer
to use our product because one can maw the plants by just pushing the lawn-
mower.
5. Power consumption will be one of the biggest beneficial aspects of the team’s
product because it contains mechanical wheels which need less energy than
ordinary sickle.
7. Because of having metal part in our lawn-mower, weight will be heavier and
this may be one of negatives of product.
7. Tidiness will be beneficial, due to fact that team has net which collects grass
and will not scatter around.
8. According to the final design, the team’s product design changed noticeably
but it is neither beneficial nor detrimental.
9. The last drawback is noisiness. The team’s product might be a little bit noisy
while it is working.
Conclusion
The “Big Bang” team had chosen other project that was not included in
the topics. The team introduced the problems with the sickle which is
widely used in rural areas. The disadvantages of sickle were the
followings:
1. Grass is mixed up while mowing
2. Consumes too much energy
3. It is not comfortable for everybody
4. It is not automated equipment

The team tried to find solutions to these problems and came up with
four conceptual designs. After that, with the purpose of having optimal
product in the final design, the group decided experiencing three cycles
which second and third cycles included sub-cycles.
In the final design, the team’s product was excellent rural tool which
included a number of benefits.
Finally, the team decided to evaluate themselves in order to know
whether which features of the final product was on advantage,
disadvantage, or not changed
Acknowledgements
First of all, we are grateful to the University of Inha for teaching us such
subject which helped to inhance our knowledge about creative
engineering design. We also thank Prof. Sarvar Abdullaev for supporting
us during our conceptual design process, and for giving feedback for
our first conceptual design.
We are really fortunate that, we had the kind association with
sophomore students who gave us exemplary guidance, constant
encouragement throughout our project.
We would also like to thank one of our team member’s relative who
drew the final design.
Finally, Farrukhbek Zokirov (Leader) would like to thank to all members
of the “Big Bang” group for showing productive work throughout the
project.
REFERENCES

• Wikipedia. (2014, May). Sickle. Retrieved from
https://en.wikipedia.org/wiki/Sickle

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