Control and monitoring the automatic weighing and packing rice system

Trang 1 MINISTRY OF EDUCATION AND TRAINING HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING GRADUATION THESIS AUTOMATION AND CONTROL ENGINEERING

MINISTRY OF EDUCATION AND TRAINING

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION

FACULTY FOR HIGH QUALITY TRAINING

GRADUATION THESIS AUTOMATION AND CONTROL ENGINEERING TECHNOLOGY

CONTROL AND MONITORING THE AUTOMATIC

WEIGHING AND PACKING RICE SYSTEM

ADVISOR : TRAN VI DO, Ph.D STUDENTS : PHAN TRAN KIEU PHI

HO QUANG HIEP

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION

FACULTY FOR HIGH QUALITY TRAINING

-⸙∆⸙ -

GRADUATION PROJECT

Ho Chi Minh City, June 27th, 2023

CONTROL AND MONITORING THE AUTOMATIC WEIGHING AND PACKING RICE SYSTEM

Major: AUTOMATION AND CONTROL ENGINEERING TECHNOLOGY Advisor: TRAN VI DO, Ph.D

THE SOCIALIST REPUBLIC OF VIETNAM

Independence – Freedom– Happiness

-

Ho Chi Minh City, , 2023

GRADUATION PROJECT ASSIGNMENT

Student name: Phan Tran Kieu Phi Student ID: 19151083

Student name: Ho Quang Hiep Student ID: 19151055

Major: Automation and Control Engineering Technology Class: 1915CLA

Date of assignment: 06/02/2023 Date of submission: 30/06/2023

1 Project title: Control and monitoring the automatic weighing and packing rice system

2 Initial materials provided by the advisor:

 Datasheet of Siemens Simatic HMI

 Model conveyor

 How to use loadcell, sealing part

3 Content of the project:

 The system designed on SOLIDWORKS software

 Selection of suitable equipment for the system

 Realistic model construction with iron hardware using PLC control device, Loadcell weighing system and packing by heat sealing method

 The automatic weighing and packing rice system

 Program to control system on Tia Portal V17 software, monitoring interface on Siemens Simatic HMI

 Graduation thesis (word, powerpoint and experimental running video)

CHAIR OF THE PROGRAM

(Sign with full name)

ADVISOR

(Sign with full name)

THE SOCIALIST REPUBLIC OF VIETNAM

Independence – Freedom– Happiness

-

Ho Chi Minh City, , 2023

ADVISOR’S EVALUATION SHEET

Student name: Phan Tran Kieu Phi Student ID: 19151083

Student name: Ho Quang Hiep Student ID: 19151055

Major: Automation and Control Engineering Technology

Project title: Control and monitoring the automatic weighing and packing rice system

Advisor: Ph.D Tran Vi Do

EVALUATION

1 Content of the project:

2 Strengths:

3 Weaknesses:

4 Approval for oral defense? (Approved or denied)

5 Overall evaluation: (Excellent, Good, Fair, Poor)

THE SOCIALIST REPUBLIC OF VIETNAM

Independence – Freedom– Happiness

-

Ho Chi Minh City, , 2023

PRE-DEFENSE EVALUATION SHEET Student name: Phan Tran Kieu Phi Student ID: 1 9 1 5 1 0 8 3 Student name: Ho Quang Hiep Student ID: 1 9 1 5 1 0 5 5 Major: Automation and Control Engineering Technology Project title: Control and monitoring the automatic weighing and packing rice system Name of Reviewer: EVALUATION 1 Content and workload of the project

2 Strengths:

3 Weaknesses:

4 Approval for oral defense? (Approved or denied)

5 Reviewer questions for project valuation

6 Mark: ……… (in words: )

Ho Chi Minh City, (month day, year)

REVIEWER

(Sign with full name)

Declaration Of Authorship

I hereby declare that this thesis was carried out by ourself under the guidance and supervision of Ph.D Tran Vi Do; and that the work contained and the results in it are true by author and have not violated research ethics The data and figures presented in this thesis are for analysis, comments, and evaluations from various resources by my own work and have been duly acknowledged in the reference part

In addition, other comments, reviews and data used by other authors, and organizations have been acknowledged, and explicitly cited

I will take full responsibility for any fraud detected in my thesis

Ho Chi Minh City, day month year

Author 1 (signature and full name)

Author 2 (signature and full name)

Acknowledgment

The graduation thesis is the last big project we have to complete in order to graduate and become an engineer This is a project that applies all the knowledge we have learned during our four years of university To have full knowledge and ability to complete the project:

"Control and monitoring the automatic weighing and packing rice system", we would like

to sincerely thank the school administrators of the Ho Chi Minh City University of Technology and Education for helping and creating fulfilling facilities that are helpful throughout the learning course

In addition, we deeply thank the teachers in the Faculty for High Quality Training, who are kind and conscientious They help us to gain knowledge, which is fundamental and necessary to widen our mind Specially, the instructor Ph.D Tran Vi Do, who helps us to accomplish the project We sincerely thank him, thankful for his instructions and particularly research directions Moreover, my supervisor provides many valuable documents during the learning and doing the final project, these theories give a hand to iron out problems quickly

And not to mention, it was the help and encouragement from family and friends that created the best conditions for us to complete

However, in the process of making the project, due to my limited specialized knowledge,

it is inevitable that there are some shortcomings when presenting and evaluating the problem We look forward to receiving the comments and evaluation of the teachers to make my thesis more complete

Thank you sincerely!

Table of Contents

GRADUATION PROJECT ASSIGNMENT i

ADVISOR’S EVALUATION SHEET iii

PRE-DEFENSE EVALUATION SHEET iv

Declaration Of Authorship v

Acknowledgment vi

Table of Contents vii

List of Figures ix

List of Tables xi

List Of Acronyms xii

Abstract xiii

Chapter 1 OVERVIEW 1

1.1 Introduction 1

1.2 Objectives 3

1.3 Research content 3

1.4 Limitations of the topic 3

1.5 The applicable ability of this project 3

Chapter 2 LITERATURE REVIEW 5

2.1 Learn about the product weighing 5

2.2 Learn about heat sealer 5

2.3 Building a model on the subject of rice weighing and packing system 5

2.3.1 Operated – controlled the system 5

2.3.2 Controlled and monitored system 6

2.4 The block diagram of the system 7

Chapter 3 HARDWARE DESIGN 9

3.1 Hardware requirements 9

3.2 Design system 9

3.2.1 Design software overview 9

3.2.2 Mechanical design 10

3.2.3 SOLIDWORKS simulated system 16

3.3 Material 17

3.4 Devices used in the project 17

3.4.7 Reversing valve 28

3.4.8 Relay 30

3.4.9 Button 32

3.4.10 Loadcell 32

3.4.11 Weight transmitter of loadcell 35

3.4.12 Sealing part 36

3.4.13 Electric cabinet 37

3.4.14 Electric circuit breaker (CB) 38

3.4.15 Siemens Simatic HMI 38

3.4.16 Signal light 41

3.4.17 Product sensor 41

3.5 Hardware construction 43

3.5.1 Connection diagram 43

3.5.2 Hardware assembly 45

Chapter 4 SOFTWARE DESIGN 47

4.1 Software requirements 47

4.2 Build on software 47

4.2.1 Tia – portal v17 software 47

4.2.2 Program to active system 48

4.2.3 Control and monitoring interface on Siemens Simatic HMI 51

Chapter 5 EXPERIMENTAL RESULTS 54

5.1 Implementation results 54

5.1.1 Achieved results on designing hardware 54

5.1.2 Achieved results on designing software 54

5.1.3 Achieved results on performances of the system 55

Chapter 6 CONCLUSION AND RECOMMENDATIONS 60

6.1 Conclusion 60

6.1.1 System advantages 60

6.1.2 System disadvantages 60

6.2 Development direction 60

References 61

Appendices 62

List of Figures

Figure 1 VINACOMM 's pesticide packaging machine 2

Figure 2 JIMEI VIETNAM's 3in1 carbonated soft drink filling machine 2

Figure 3.Block diagram of PLC system 7

Figure 4 Block diagram of the system 7

Figure 5 Symbol of SOLIDWORKS software 2021 9

Figure 6 Main interface of SOLIDWORKS 2021 10

Figure 7 Shaped aluminum 20x20 length 20cm 10

Figure 8 Shaped aluminum 20x20 length 110cm 10

Figure 9 Whole mechanical frame 11

Figure 10 2D version of machine body 11

Figure 11 Simulated of rice hopper 11

Figure 12 Simulated piece 1 of rice hopper 12

Figure 13 Simulated piece 2 of rice hopper 12

Figure 14 Simulated piece 3 of rice hopper 13

Figure 15 Simulated filter hopper the volume of rice 13

Figure 16 Simulated discharge hopper foot 14

Figure 17 Simulated rice bag support plate 14

Figure 18 Cylinder simulation 15

Figure 19 Simulate other devices 15

Figure 20 Top view electrical cabinet drawing 15

Figure 21 Front view electrical cabinet drawing 16

Figure 22 Inside view electrical cabinet drawing 16

Figure 23 SOLIDWORKS simulated weighing and packing rice system 16

Figure 24 Power supply 24V 20A, with fan 17

Figure 25 Diagram of power 18

Figure 26 PLC Siemens S7-1200 CPU 1214C DC/DC/DC 18

Figure 27 Diagram of PLC Siemens S7-1200 CPU 1214C DC/DC/DC 19

Figure 28 General structure of the conveyor belt 20

Figure 29 Belt Conveyor 21

Figure 30 Siemens AC Motor 21

Figure 31 AC Motor parameters 21

Figure 32 Inverter MM420 Siemens 22

Figure 33 Block diagram of inverter 22

Figure 34 Geared Motor-Generator Motor DS400 23

Figure 35 Geared Motor-Generator Motor DS400 wiring diagram 24

Figure 36 Construction of double acting piston 24

Figure 37 5/2 reversing valve 28

Figure 45 Wiring diagram of Loadcell weighing value display unit 33

Figure 46 The actual application of the device 33

Figure 47 5kg Loadcell Sensor 34

Figure 48 Loadcell wiring 34

Figure 49 JY-S85 Weight transmitter 35

Figure 50 Detailed functional pins 35

Figure 51 Internal circuit of JY-S85 transmitter 35

Figure 52 Heating Wire 24V - 40W 36

Figure 53 Low voltage Buck circuit 36

Figure 54 Electric cabinet 37

Figure 55 Electric circuit breaker BS1112TV 38

Figure 56 Siemens Simatic HMI 6AV2123-2DB03-0AX0 4 inch 39

Figure 57 Connectivity – Communication of Siemens Simatic HMI 40

Figure 58 AD16-22D/S Indicator Light 22mm 24V 41

Figure 59 Optical sensor E3F-DS10C4 42

Figure 60.The operating structure of the diffuse reflection sensor 42

Figure 61 Diagram of optical sensor E3F-DS10C4 42

Figure 62 Wiring diagram of optical sensor E3F-DS10C4 43

Figure 63 PLC hardware design 43

Figure 64 Dynamic circuit 44

Figure 65 Pneumatic dynamic circuit 45

Figure 66 Weighing and packing rice system after actual completion 45

Figure 67 Control panel above electrical cabinet 46

Figure 68 Electrical cabinets 46

Figure 69 Tia Portal V17 47

Figure 70 TIA Portal icon 47

Figure 71 Control algorithm for the whole system 48

Figure 72 Manual running program 49

Figure 73 Auto running program 50

Figure 74 TIA Portal software interface 51

Figure 75 The subroutines used 51

Figure 76 Hardware of PLC S7-1200 51

Figure 77 Hardware Siemens Simatic HMI 52

Figure 78 Connection between PLC and Siemens Simatic HMI 52

Figure 79 Authorization of engineers 52

Figure 80 Authorization of Users 52

Figure 81 Main screen 53

Figure 82 Notification screen 53

Figure 83 Hardware results achieved 54

Figure 84 Main screen 54

Figure 85 Notification screen 55

Figure 86 The system is completed 55

Figure 87 Bag of rice after weighing and sealing 56

List of Tables

Table 1 List of devices used in the system 17

Table 2 Cylinder used in the system 24

Table 3 Interface definition 35

Table 4 Statistics of many test runs 59

List Of Acronyms

 PLC: Programmable Logic Controller

 HMI: Human Machine Interface

 CB: Electric Circuit Breaker

 AC: Alternating Current

 DC: Direct Current

Abstract

At the moment, the quantitative stage is crucial to the manufacturing process in factories and industrial areas Because the quantitative stage makes it possible to estimate the precise manufacturing amounts of raw materials, completed goods, and semi-finished goods Dosing equipment is used in practically every stage of the manufacturing process, including the phases of material supply and storage, material supply for each stage, product weighing, and product packaging

In order to increase productivity, lower product prices, cut operating expenses, and boost competitiveness in the present integration process, businesses place a high priority on the automatic management and monitoring of production processes in general, and quantitative weighing in particular

Control and monitoring of the automatic weighing and packing system for rice is the topic

of this study A PLC-based design project for a rice weighing and packaging system Following passage through the amplifier, the PLC is in charge of reading the weight value

in the appropriate form from the Loadcell's output a pre-written software that the PLC may use to read, compute, and interact with the control interface HMI while also designing the weighing system The functions to configure the starting parameters for the weighing system are shown on the control interface along with the weighing weight of each batch Next, rice will be packed through the use of plastic bags to store and seal the mouth of the bag with sealing part Finally, provide the experimental findings and future plans for the subject

Keywords: System, Product, Quantitative, Packing, PLC, HMI

CHAPTER 1 OVERVIEW

Chapter 1 OVERVIEW 1.1 Introduction

Vietnam is an agricultural nation, and a lot of its high-yield agricultural goods are exported, including coffee, rice, beans, and others [1] As a result, companies are seeing an increase

in demand for quantification High precision and huge output are becoming more necessary for this procedure The quantitative weighing system is used extensively

In the packaging workshop, a system for product weighing and packing has been built There will be several weighing systems in such a workshop, and two or three people will

be assigned to each system to guarantee proper and secure operation The process of weighing and packing involves several steps, such as the initial placement of materials into separate tanks of each weighing machine, followed by the packing of little bags when the weight is sufficient

 Weighing system

A dynamic electronic weighing device called a "weighing scale" is used to quantitatively weigh materials for the manufacturing of goods immediately on a conveyor system The manufacturing line will benefit from the addition of a quantitative weighing scale since it will enable the factory's production system to run constantly and guarantee the standard volume of raw materials for the finished product Product value is increased by assisting product quality standards in reaching the highest standards

The material enters the weighing scale through a mechanical component located on the load cell, where it flows through a force sensor that produces an electrical signal and sends

it to the central controller

The actuators receive signals from the central controller to lower the flow of material or to completely stop the feed once it calculates and compares against the predetermined threshold

 Packing system

Packaging machines can be categorized in a variety of ways Typically, people categorize machines based on their level of automation, their purpose, and the kind of packaged goods they produce

 Sort by automatic level

 Automatic packaging machine

 Semi-automatic packaging machines

 Sort by function

 Sort by type of packaged product

 Pharmaceutical packaging

CHAPTER 1 OVERVIEW

For the pharmaceutical industry, the first requirement is patient safety The packaging is not allowed to have much impact on the drug In addition, pharmaceutical packaging must comply with standards to be able to distinguish from fakes, trace the origin and quickly recall

Figure 1 VINACOMM 's pesticide packaging machine

 Food packaging

 Beverage bottling line

Figure 2 JIMEI VIETNAM's 3in1 carbonated soft drink filling machine

 Packing confectionery, snacks

 Packing industrial goods

Because there are many methods of product packaging, depending on the product to be packaged and the cost, we will choose the appropriate packaging method

For this topic, we choose to use loadcell to weigh products and pack them by heat sealing method Because, rice is in the form of small, many grains, it needs to be weighed and packed in a certain volume depending on the needs of customers We use plastic bags for

CHAPTER 1 OVERVIEW

1.2 Objectives

Control and monitor the automatic rice bagging weighing system based on the following requirements:

 Dimensions: (Length x Width x Height) 80 x 60 x 110 (cm)

 Weight of 1 bag: from 200 gram to 400 gram Depends on weight rating setting Because the system is small and simple, it can only weigh and pack small volumes

of rice, less than 400 grams Finished product error: 5%

 Productivity: 60 bags/hour

 Materials that can be weighed: rice

 Material of rice bag: nylon

 Size of 1 bag: (Width x Length) 17 x 27 cm, no handle, size 1kg

 Count the number of completed

 Build Siemens Simatic HMI interface to help users easily monitor and operate

1.3 Research content

The project is divided into 6 chapters with the following main contents:

 Chapter 1 Overview

 Chapter 2 Literature review

 Chapter 3 Hardware design

 Chapter 4 Software design

 Chapter 5 Experimental results

 Chapter 6 Conclusion and recommendations

1.4 Limitations of the topic

Control and monitoring the automatic weighing and packing rice system is a topic that has been researched and developed for a long time Currently, in factories, there are many systems perfect for both quality and aesthetics However, within a research topic, with limitations on knowledge, time and funding, so research limits of the topic:

 Have to put the bags in by ourselves, there is no automatic bag feeding system yet

 For indoor use only

 The system only weighs and packs the product, does not detect the error on the product

1.5 The applicable ability of this project

The project plays an important role in production due to the increasing requirements for weighing and packaging With purpose:

 In the manufacturing sector, automate the line production process specifically: a technique for packaging and weighing rice

CHAPTER 1 OVERVIEW

 Better capacity to manage on-line mistakes

 Decreased labor force, prevention of boredom at work, better working circumstances, access to science and technological advancements, and employment

in an increasingly civilized atmosphere brighten and lower labor expenses

 Measuring the minor mistake that can be made in the weight of each product helps

to more accurately determine if the weight of each finished thing is somewhat off, missing, or excessive compared to the predetermined standards

 Simplifies administration and oversight because it may drastically reduce the number of employees while simultaneously altering their working circumstances

CHAPTER 2 BACKGROUND

Chapter 2 LITERATURE REVIEW 2.1 Learn about the product weighing

[2] Manufacture of Electronic Weighing Machine Using Load Cell

I've seen scales in many stores where you simply place an item on the weighing platform and the machine displays the weight In " Manufacture of Electronic Weighing Machine Using Load Cell " project, they use the loadcell acts as a converter, converting weight into power The basic unit of a load cell is a strain gauge that deforms when pressure is applied Load cells are high precision transducers that provide users with information not commonly available with other technologies due to commercial factors First, they need to calibrate this system to measure the correct weight This process then gives fairly accurate results

2.2 Learn about heat sealer

[3] Heat-sealing method for plastic containers

Plastic containers are fitted with plastic bead seals at the junctures between the interlocking closure and the side edges of the container A plastic bead seal acts as a barrier to prevent the passage of liquids and contaminating bacteria through this joint fastener A method and apparatus are provided for forcing plastic under heat and pressure into and over a joint to form a bead seal barrier

[4] Cutting/sealing device for plastic bag making machines

A plastic bag making machine consisting of vertically aligned upper and lower machine sections that move toward and away from each other to cut and seal plastic film that is conveyed between the two machine sections in a horizontal path, has three main characteristics: The first feature is a simplified holding and feeding mechanism for each machine section to feed regularly worn Teflon sheets without manipulating numerous screws or other equipment The second feature is that a cutter/sealer acts on a pre-formed tubular or slit plastic film as it passes through the machine, repeatedly cutting and sealing both films to produce plastic bags His third feature of this device is that it has mechanisms

to prevent and compensate for buckling in his two planes of the heating and sealing bars

of the upper and lower sections of the machine

2.3 Building a model on the subject of rice weighing and packing system

2.3.1 Operated – controlled the system

Put the rice in the tank first, then enter the amount of rice to be weighed on the HMI display

to control and monitor the automatic weighing and packaging rice system The loadcell will determine the weight of the rice in the hopper with the appropriate quantity, and the discharge cylinder will be closed after the loadcell has reached its conclusion The system will weigh the rice, the rice hopper lid will open, and the rice will fall into the round hopper

CHAPTER 2 BACKGROUND

used to weigh the rice Next, go to the stage of sealing the bag's mouth First, open the round funnel's mouth to let rice enter the bag, then shut the bag's mouth When finished, the gadget will drop to a support plate, be pushed by a cylinder to a conveyor belt, and then placed into a barrel The final product will pass through the sensor, which will then send a signal to the PLC so it can count how many of them there are

Two operation modes: "Auto" and "Manual", will be available When in "Auto" mode, the system will run consecutively through the predetermined processes to generate the completed product once you enter the amount of rice to be weighed and push the start button Users can actively manage the cylinder in "Manual" mode to complete the processes of weighing and sealing rice bags

Push buttons and sensors both receive signals that are delivered to the PLC for processing before being transmitted to the conveyor and cylinder, respectively

The idea employs a DC motor instead of an inverter to regulate the motor's rotational speed because the transmission is tiny and only utilized to transfer completed goods into the tank, negating the necessity for a speed controller

However, the project does not handle the procedure of inserting the bags; instead, the bags must be manually attached

2.3.2 Controlled and monitored system

The conveyor belt's running and stopping may be controlled by the model in two different modes: automatic and manual In addition to monitoring the parameters, the weight of the rice the machine is weighing, the number of finished bags, and which equipment is active through the indicator light on the screen, it is also possible to input the value of the rice to

be weighed, alter the heat welding duration, and enter parameters

Alarm and Trend are also shown on the Siemens Simatic HMI panel A notice board detailing the system's operations will show when users choose "Alarm" to make it easier for them to understand The 'Trend' display screen displays the pattern or variation of the amount of rice to be weighed using the loadcell to aid in keeping track of the system's stability and weighing inaccuracy for prompt correction and processing time

Operators may easily operate the system, monitor operations, and rapidly identify faults for prompt treatment by creating an interface on Siemens Simatic HMI screen

CHAPTER 2 BACKGROUND

2.4 The block diagram of the system

Figure 3.Block diagram of PLC system

Function of each block:

 PLC control block is the central block with the main control function

 Power supply: 24V power supply for PLC to work

 Display block: Using equipment used to control and monitor the system

 Signal block: It is the place to receive information from peripheral devices for processing The input signal can be a switch, sensor,

 Output block: include rice weighing scale, sealing the mouth of bag, conveyor running block The information after processing is sent to the control device, the output signal can be a motor, inverter,

Figure 4 Block diagram of the system

From the block diagram of the system, we can see that: The source that needs to be supplied

to the PLC to work is 24VDC PLC control block is the central block with the main control function Firstly, Siemens Simatic HMI is connected to PLC via Ethernet then display screen to control and monitor the system Secondly, PLC receives signals from buttons, sensors, the weight transmitter and then transmit the signal to control the operation of the electronic valve to control the cylinder for weighing rice and sealing the bag mouth

CHAPTER 2 BACKGROUND

Finally, PLC send a signal to the inverter to control the motor to make the conveyor belt work to help put the finished product into the bin Thanks to the inverter, the rotational speed of the motor can be adjusted But the project we do is on a small scale, the conveyor

is only used for moving finished products into the bin, so there is no need to adjust the level of the conveyor belt So, instead of using an inverter to control the 3-phase motor, we changed it to a DC motor to run the conveyor belt

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

Chapter 3 HARDWARE DESIGN 3.1 Hardware requirements

The system is divided into two main jobs: weighing the quantity of rice on demand and sealing the mouth of the bag Divided into 4 floors of activities The first floor is used to discharge materials The second floor is used to weigh rice by loadcell The third floor uses

a cylinder to hold the mouth of the bag and conduct sealing The fourth floor is used to push the finished product to the conveyor belt and through the sensor to count the number

of finished bags

 Dimensions: (Length x Width x Height) 80 x 60 x 110 (cm)

 Weight of 1 bag: from 200 gram to 400 gram Depends on weight rating setting

 Size of 1 bag: (Width x Length) 17 x 27 cm,no handle, size 1kg

 The sensor returns a fast signal to avoid noise and errors

 Sufficient power supply for the system to operate

 The motor has enough torque to pull the load

 The supply pneumatic is enough for the cylinder to work well and quickly

 Align the loadcell for accurate and sensitive readings

 The pack sealer heats up well, can seal the mouth of the bag, leaving no black marks

on the bag

3.2 Design system

3.2.1 Design software overview

System is designed on SOLIDWORKS 2021 software

Figure 5 Symbol of SOLIDWORKS software 2021

SolidWorks is 3D design software running on Windows operating system and available since 1997, and created by Dassault Systèmes SolidWorks Corp, a subsidiary of Dassault Systèmes, S A (Vélizy, France) SolidWorks is currently used by more than 2 million engineers and designers in more than 165,000 companies worldwide

History: SolidWorks company was founded in December 1993 by Hirschtick, a graduate

of the famous MIT - Massachusetts Institute of Technology; Hirschtick used the $1 million

he raised as a member of the MIT Blackjack Team to start the company Headquartered in Waltham, Massachusetts, USA, Hirschtick recruited a team of engineers to create an easy-to-use 3D CAD software Easy to use, affordable, and customizable on Windows desktop Later relocating to Concord, Massachusetts, SolidWorks released its first version of

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

SolidWorks 95, in 1995 In 1997 Dassault, the company best known for its CATIA software, acquired SolidWorks for $310 million in stock Up to now, SOLIDWORKS has made great strides in features, performance and ability to meet 3D design needs in the engineering and industrial sectors SOLIDWORKS is also widely developed and applied

in other industries such as: pipeline, architecture, interior, construction thanks to its powerful 3D design features and diverse portfolio of supporting solutions

SolidWorks currently has several versions such as SolidWorks CAD, eDrawings a support tool, and DraftSight, a 2D CAD product

SolidWorks was run by John McEleney from 2001 to July 2007 and Jeff Ray from 2007 to January 2011 The current CEO is Bertrand Sicot

SOLIDWWORKS has the following features: the ability to design perfect 3D models, the ability to assemble parts, export drawings, machining features, dynamic analysis

Figure 6 Main interface of SOLIDWORKS 2021

In this project, we use SOLIDWORKS version 2021 to design the system

3.2.2 Mechanical design

3.2.2.1 Mechanical frame

Machine body: is a rack, used to place components: rice hopper, hopper filter the volume

of rice, cylinder, loadcell weight sensor, heat sealing machine to seal the mouth of the bag

We use shaped aluminum 20x20 with dimensions as shown in Figure 7, 8 to assemble frame for the system Because, this type has slots for easy installation of equipment, the air ducts and electrical wiring are neat and tidy

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

Figure 9 Whole mechanical frame

Figure 9 shows the complete frame of the system installed The system is installed using

14 shaped aluminums with length 20cm and 4 shaped aluminums with length 110cm Dimensions of the frame: (Length x Width x Height) 20 x 20 x 110 (cm)

Figure 10 2D version of machine body

Load cell holder: If the loadcell is attached directly under the rice quantitative filter, after

weighing enough cylinders, the mouth of the hopper will close, because the movement of the cylinder will affect the weight, so we have designed a U-bar to attach the loadcell

Rice hopper: used to store rice, the rice hopper is assembled from 6 different pieces

a/ Simulated b/ 2D drawing

Figure 11 Simulated of rice hopper

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

o Piece 1 of rice hopper: use 2 pieces 1 to form the front and back of the rice hopper

a/ Simulated b/ 2D drawing

Figure 12 Simulated piece 1 of rice hopper

o Piece 2 of rice hopper: use 2 pieces 2 to form the left and right of the rice hopper

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

a/ Simulated b/ 2D drawing

Figure 14 Simulated piece 3 of rice hopper

Filter hopper the volume of rice: used to store the amount of rice to be weighed

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

Discharge hopper foot: used to open and close rice at the hopper to measure rice, made of

aluminum cut to size as shown above Because the mouth of the funnel is round, only 1 aluminum plate is needed

a/ Simulated b/ 2D drawing

Figure 16 Simulated discharge hopper foot

Rice bag support plate: used to support the bag of rice after welding After the rice has

been sealed, the finished product will fall on this support plate and be pushed out by the cylinder to the conveyor belt and into the barrel

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

3.2.2.2 Cylinder

Simulate types of Cylinders to assemble for the system

a/ Discharge cylinder b/ Finished product push cylinder

c/ Bag holding cylinder d/ Bag mouth welding cylinder

Figure 18 Cylinder simulation

3.2.2.3 Other devices

a/ Symbolic simulation for loadcell b/ Heating rod

c/ Conveyor simulation d/ Product sensor simulation

Figure 19 Simulate other devices

3.2.2.4 Electrical cabinet drawing

The electrical cabinet design shows how to arrange the equipment in the cabinet, making the installation easier, faster and more convenient

Figure 20 Top view electrical cabinet drawing

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

Figure 21 Front view electrical cabinet drawing

Figure 22 Inside view electrical cabinet drawing

3.2.3 SOLIDWORKS simulated system

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

Figure 23 is the system after being fully assembled in SOLIDWORDS From SOLIDWORKS drawings, we proceed to construct and install the system quickly and minimize errors

3.3 Material

Based on the design, we have made a list of components used in the system

Table 1 List of devices used in the system

Numerical order Device Quantity Price

11 Electric circuit breaker (CB) 1 70 000VND

12 Programable logic controller 1 6 000 000 VND

Total estimated budget to complete the project is 15 535 000VND

3.4 Devices used in the project

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

 Output: DC 24V - 20A

 Power: 480W

 Function: Supply power to PLC, Siemens Simatic HMI and active load

 Features: Over-current, over-voltage, overload, and short-circuit protection Connection diagram of the device:

Figure 25 Diagram of power

3.4.2 Programmable Logic Controller 1214C DC/DC/DC

Programmable Logic Controller is a programmable control device that allows flexible implementation of logic control algorithms through a programming language Depending

on the requirements of each system, the user can program the corresponding events These events are executed one after another in the program and iteratively The CPU in the programmable controller will read program from memory, check the memory areas containing input values, and execute the instructions in the program in turn affecting the memory areas that store output values to control actuators, motors, and lights …

PLC overcomes the disadvantages of wired controllers such as: reducing the number of wires; easily add other devices to the system; flexible change of program; simple maintenance and repair; high reliability; ability to communicate with other devices

Figure 26 PLC Siemens S7-1200 CPU 1214C DC/DC/DC

 Specifications: PLC Siemens S7-1200 CPU 1214C DC/DC/DC

Product code: CPU 1214C – 6ES7214-1AG40-0XB0

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

 Connection diagram of the device:

Figure 27 Diagram of PLC Siemens S7-1200 CPU 1214C DC/DC/DC

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

3.4.3 Mechanical frame

In this project, we choose aluminum and mica as the frame of the system Because aluminum has the characteristics of high strength, wear resistance, high machinability, good weldability, good formability, it is often used for automation and mechanical components, real molds products and molds for processing and manufacturing, so it is very suitable to be selected as a system framework; mica plastic sheet with outstanding features such as: being a flexible material that can be easily constructed: processing, installation, bending, pressing, assembling, cutting or shaping ; flat, smooth, smooth surface; high strength, good heat resistance, corrosion resistance by chemical substances; Non-conductive, non-heating and cost-effective, so it is perfectly suitable for use in square hoppers containing rice and product plates

3.4.4 Conveyors

 Belt Conveyor

Conveyor belt is a device that conveys products, materials helps to move from one location to another with fast speed, efficiency and accuracy Types of conveyor belts are composed of many different materials, rich and diverse types

Figure 28 General structure of the conveyor belt

(1) – Traction unit with working elements directly carrying the object

(2) – Tensioner, which creates and holds the necessary tension for the pulling unit

(3) – Driving station, transmitting motion for traction unit

There is also a support system (rollers, supports, etc.) located under the puller that acts as

a slide for the puller and the working elements

In fact, depending on the complexity of product requirements, systems have different large

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

- Width: 10cm

- Height: 40cm

- Weight: highest volume of rice: 1kg

Figure 29 Belt Conveyor

 Specifications:

- Height: can be customized

- Dimensions: (Length x Width x Height) 44 x 10 x 40 cm

- Motor: geared motor 24V

- Material of the frame: made of good anti-static aluminum profile

- Material of conveyor belt: bearing rubber band

- Maximum mass that the conveyor belt can load: 4kg

3.4.5 Motor

Figure 30 Siemens AC Motor

Figure 31 AC Motor parameters

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

 Phase: 3PH

 Power: 3 HP

 RPM: 3485 RPM

 Shaft OD: 1.125 IN

 Voltage: 220 V-AC, 440 V-AC

To control the speed of the motor, we use an inverter

Figure 32 Inverter MM420 Siemens

 Specifications:

 Inverter power: 0.75 KW

 Power supply: 3 phase 380-480V, 45-63Hz

 3 programmable digital inputs

 1 analog input

 1 analog output: 0 - 20mA

 Relay output: 1

 Serial communication port: RS-485, operated with USS protocol

 Communication: Profibus, Device Net, CANopen

 Block diagram of the inverter:

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

In the model, because a belt conveyor is used and a large load is not required, there is no need for a large-capacity motor With quite simple requirements of the conveyor belt as:

- Conveyor belt runs continuously, can stop when needed

- Does not require high accuracy, light conveyor load

- Easy to control, low cost

Based on the requirements of the conveyor belt is 44cm long and 10cm wide, weight 4kg,

So just use a DC motor with a small capacity with a DC voltage of 24 V

The DS400 is an engine with two main functions: as a mini generator and as a geared motor It is a very useful motor during power outages for small power equipment; is an indispensable motor in the operation of large-capacity machinery because the DS400 helps

to reduce the rotational speed and increase the torque of the shaft

Figure 34 Geared Motor-Generator Motor DS400

CHAPTER 3 DESIGN SYSTEM ON SOLIDWORK

Wiring Diagram:

Figure 35 Geared Motor-Generator Motor DS400 wiring diagram

2 output wires of the motor connected to the 24V source, regardless of the polarity (positive and negative poles connected to 2 different wires will reverse the motor)

3.4.6 Cylinder

 We need to use 8 cylinders for all system

Table 2 Cylinder used in the system

Numerical order Quantity Function

1 2 Open and close the lid of the rice hopper

2 1 Open and close the mouth of the rice quantitative filter

3 2 Hold the mouth of the bag

4 2 Attach the heat sealer to seal the mouth of the bag

5 1 Push the finished product to the conveyor

Due to the characteristics of the quick-acting cylinder, the stroke is not large and fixed, so the authors choose a two-way acting cylinder to be used in the system The two-way acting cylinder helps the system to be controlled in a fully automatic and precise manner

Structure of double acting cylinder:

Figure 36 Construction of double acting piston

1 Piston 2 Piston seal 3 Piston shaft 4 Guide

5 Shaft seal 6 Dust ring 7 Cylinder cover 8.13 Fluid door

9 Cylinder body 10 Shaft chamber 11 Piston chamber 12 Cylinder base