THESIS

DESIGN OF CASSAVA SLICER

CRANKSHAFT SYSTEM USING VDI

2222 METHOD

Author

Zadrak Jontri Banamtuan

Nim 1706020006

INTRODUCTION

The East Nusa Tenggara, South Central Timor Regency are one of the areas that are rich in

agricultural products, especially tubers (cassava), but do not get good post-harvest treatment. One

of the cassava-producing farmers seeks to be able to carry out post-harvest treatment besides

being traded by still having the skin on cassava, the farmer makes cassava chips as a home

industry with a manual slicing process using a knife and using simple technology, namely grated

cassava. With the simple tools, the entrepreneurs in one day are only able to slice 30 kg - 40 kg of

cassava.

Seeing this problem, it is necessary to design and make a

simple tool in the slicing process that can increase the

productivity of cassava chips and be able to reduce

human labor and increase the capacity of the slices.

In a design there are several methods that can be used, one of the methods is the VDI 2222

method. The VDI 2222 method uses a systematic approach to design for engineering systems and

engineering products. Therefore, the VDI 2222 method makes it easier for designers to make a

product.

INTRODUCTION

BACKGROUND

Scope of problem

Benefits of this research

For

StudentsFor

UniversityFor

Society

RESEARCH METHODS

Time and place of research

Research Activity Schedule

Research procedure

❖Design using VDI 2222 method

❖Literature Study

❖Stages of preparation

❖Tool Making Stage

❖Tool Testing Stage

Data analysisThe test data in this study are divided into 2 parts, namely

design data and test data. Design data is detailed tool data and

tool specifications made in the form of working drawings. The test

data in this study were in the form of testing the results of slicing

to determine the thickness of the slices and the time required

during the slicing process to the difference in the angle of the

knife used.

Research flow chart

REVIEW LITERATURE

➢ Previous Review literature

There are actually many cassava slicers that use high technology and are already circulating in the

market. However, the better the technology used, the higher the price of the tool. Therefore, some

researchers began to think about designing a simpler tool with the same basic functions so that it can

be used for the slicing process.

VenditiasYudha and NanangNugroho researched the Design of a Cassava Chopper Machine with a

Spring Pusher. The results of the design of the cassava chopper machine have ergonomic dimensions,

the capacity of the cassava chopper reaches 80kg/hour with a semi-automatic cassava pusher using a

spring. The power of the electric motor uses 0.25 hp with the motor rotation at 1400 rpm and the final

rotation at the blade plate at 210 rpm.➢ Theoretical review

▪ Definition of Cassava

Cassava is a type of fruit from root crops that grow in the soil. Cassava is

cylindrical in shape with a tapering tip with an average diameter of about

2-5 cm and a length of about 20-30 cm. Cassava is usually traded in the

form of still skin. The tuber has a skin consisting of two layers, namely

the outer skin and the inner skin.

➢ Crankshaft

The main function of the crankshaft is to convert the up and down motion (translational motion)

produced by the piston into a circular motion (rotational motion) which will be forwarded to the

transmission. Based on this working method, the researcher chose the crankshaft as the main material

for the manufacture of the blade drive system, the translational motion of the piston was converted into

rotational motion which produced the crankpin to rotate the connecting rod of the blade housing.

➢ Design Method VDI 2222

Analyzing

1. Problem

identification

2. Product

specifications

Concepting Designing settlement

1. Clarify the problem

2. Make a list of

demands

3. Overall function

breakdown

4. Create alternative

function parts

5. Concept Variations

6. Assess alternative

concepts

1. Making scalable pre-

design

2. Eliminate critical

parts

3. Making pre-design

improvements

4. Determine the pre-

design that has been

perfected

1. Create a

drawing

arrangement.

2. Create

parts/detail

drawings and

parts lists.

REVIEW LITERATURE

4. Overall Alternative Creation

At this stage, the alternatives of each function part are selected and combined with each other to form a concept variant of

the chip raw material slicing machine with a minimum number of variants of 3 types of concept variants. By using the

morphological box method

5.Concept VariationsBased on the morphological box that has been made, three variants of the concept are

obtained. Each combination of concept variants is made and then an alternative function is

described and the combination of these concept variants is used as a cassava slicing machine.

Based on the morphological box in the table, from the three variants of the concept the

researcher uses three concept variants, namely:

The position of the selected tool is vertical. The vertical position was chosen because of

several references for slicing that position which is commonly used, both static and dynamic

slicing. In this study using dynamic slicing that is moving vertically. Using an AC motor as a

drive and a power source that will drive the pulley and belt, then the pulley and belt will drive

the disc crank eccentric motion, causing the cutting base to move vertically up and down.

The most important component parts in a slicing process are the slicing knife and the

drive mechanism. In the selection of a slicing knife, several criteria must be met, namely easy

maintenance, can slice raw materials with the settings desired by the operator such as slice

thickness and slice shape, the resulting slices are expected to be good and neat. Therefore,

the 3 variants selected by the slicer that allows it to be used is a vertical linear moving slicer. In

terms of the material to be used, it must meet the requirements for health products. There are 2

materials commonly used in tools for health products, namely aluminum and stainless. In terms

of health, it is recommended to use stainless material, but if you don't have one, you can use

aluminum. Therefore, it was chosen to use stainless as the slicing material. For the drive

mechanism, the selected must meet the criteria of being able to support changing the mode of

the cutting blade drive stroke length according to the dimensions and number of products to be

processed. Therefore, the chosen 3 variant is the crank eccentric motion mechanism.

RESEARCH RESULT

RESEARCH RESULT

This study has two final results, namely the results of designing a cassava slicer using the VDI

2222 method and the results of testing cassava after slicing.

Design Results of Cranksshaft System Cassava Slicing Machine Using VDI 2222 method

Analyze

the author applies data collection for the

analysis stage.

In collecting this data, the authors conducted

field studies and literature studies as a way to

find the references needed in designing a

cassava raw material slicing machine.

ConceptingBased on the explanation that has been conveyed, the design stage of

this cassava slicing machine is continued in making the design concept.

1. Make a List of Claims

2. Decomposition Method

At this stage, the problem solving process is carried out by determining

the function of the main parts of the machine

Black box

Part Function Demands

3. Alternative Function Part

At this stage, alternatives are arranged for each function part of the machine to be

designed.

❑Alternate Skeletal Functions

❑ Alternative Hopper Functions

❑Alternative Function of Slicing Material

❑ Alternative Slicing Function

❑ Alternative Transmission Function

❑ Alternative Functions of Movement Mechanisms

❑ Alternative Driving Functions

6. Concept Variation Assessment

The criteria for the assessment aspect are divided into two groups, namely the assessment of the technical

aspect and the economic aspect.

7. Decision

For the concept variant based on the technical aspect, the variant with a percentage close to 100

percent is selected. From the variants of the concept, the existing sub-functions are then optimized so

that a good design result is obtained as desired.

RESEARCH RESULT

Design1.Design Draft

After the combination of variants concept are

obtained, the next step is to make a draft drawing

of the cassava raw material slicing machine

design. Some components are optimized to

produce designs with construction details that are

concise and easy in the machining process.

2. Design Specification Part

The design parts used from the design of the cassava slicer crankshaft system:

1. Drive motor

2. Belt 6. Crank disc

3. Pulley 7. Mode changer

4. Axis 8. Funnel

5. Bearing 9. Funnel out

Solution

The optimized draft drawing and then the final draft drawing, the drawings of the arrangement and making of

the cassava raw material slicing machine in real form and trials. The final design will be documented in the

form of technical drawings.

2. Cassava Slicer Test Results with Crankshaft System

This test was carried out three times to determine the angle of inclination of the knife, the thickness

of the slices and the length of time for slicing.

From the observations, three experiments were carried out with different cutting edge angle

settings and the capacity of the slices. Cassava can be sliced in one minute with a cut angle of

fifteen degrees, the thickness of the slices of zero point five to one millimeter, the capacity of the

slices of zero point five kilograms. Cassava can be sliced in one minute with a cut angle of twenty

degrees, the thickness of the slices is one point five to two millimeters and the capacity of the slices

is zero point eight kilograms. Cassava can be sliced in one minute with a knife angle of twenty-five

degrees, a slice thickness of two point five to three millimeters and a cutting capacity of one

kilogram.

RESEARCH RESULT

CONCLUSION

1. The design of the crankshaft system cassava slicer using the VDI 2222 method

was successfully made according to the best variant.

2. After designing and manufacturing using the VDI 2222 method and through

direct testing on the slicing process to produce cassava with a thickness of 0.5-

3 millimeters with different cutting angles and a cutting capacity of 60 kg/hour,

this crankshaft system cassava slicer is stated proper to use.

SUGGESTION

1. Use a fixture on the engine leg to maintain a position so that it does not move

due to excessive vibration from using the crank return motion mechanism.

2. Further research needs to be done by adding a spring mechanism so as to

push cassava raw materials into the cutting edge automatically.

1st experiment 2nd experiment 3rd experiment

Documentation Of Test Results

That is all and Thankyou