MINISTRY OF EDUCATION AND TRAINING HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION GRADUATION THESIS MECHANICAL ENGINEERING TECHNOLOGY STUDY ON THE DURABILITY OF FLEXIBLE MOMENT MECHANISMS WITH VARIOUS TYPES OF PLASTIC MATERIALS INSTRUCTOR: DR.DO THANH TRUNG STUDENT: PHAM CONG THUAN TRAN THANH DANH TANG THAI KHANG SKL012647 Ho Chi Minh City, MARCH, 2024 MINISTRY OF EDUCATION & TRAINING HO CHI MINH UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY OF INTERNATIONAL EDUCATION UNDERGRADUATION THESIS STUDY ON THE DURABILITY OF FLEXIBLE MOMENT MECHANISMS WITH VARIOUS TYPES OF PLASTIC MATERIALS Intructor: Assoc. DO THANH TRUNG Students: PHAM CONG THUAN 19144077 TRAN THANH DANH 19144064 TANG THAI KHANG 19144081 Major: Mechanical Engineering Technology Year of Admisssion: 2019 – 2023 Ho Chi Minh City, March 2024 HCMC UNIVERSITY OF THE SOCIALIST REPUBLIC OF VIETNAM TECHNOLOGY AND EDUCATION Independence – Freedom – Hapiness Falcuty of International Education ----o0o---- Ho Chi Minh City, March 21, 2024 GRADUATION THESIS PROJECT TASKS Full name of student 1: PHAM CONG THUAN Student ID: 19144077 Full name of student 2: TRAN THANH DANH Student ID: 19144064 Full name of student 3: TANG THAI KHANG Student ID: 19144081 Instructor’s full name: Assoc. DO THANH TRUNG Major: Mechanical Engineering Technology Forms of training: Formal training Year of Admission: 2019 – 2023 Class: 19144CLA Date of delivery: 01/10/2023 Task complete date: 30/1/2024 I. PROJECT REFERENCE NUMBER: CTM-17 Thesis: Study on the durability of flexible moment mechanisms with various type of plastic materials.
ORIGINAL DOCUMENTS − Model test: flexible moment mechanisms. − Plastic materials: common plastic materials (PP, PA6, ABS, HDPE,…). − Prototyping methods: plastic injection injection. − Mechanism and Machine Theory: Functional joint mechanisms with constant- torque outputs.
− Design and Optimization of a New Compliant Rotary and Positioning Stage with Constant Output Torque. − Design and Analysis of a Compliant Constant-Torque Mechanism for and Rehabilitation Devices. CONTENT OF IMPLEMENTATION − Overview of flexible moment mechanisms. − Manufacturing test samples corresponding to various plastic materials.
− Twist strength testing. − Statistical analysis and interpretation of test results. PRESENTATION LANGUAGE − Report Document: English ☒ Vietnamese ☐ − Thesis Defense Presentation: English ☒ Vietnamese ☐ INSTRUCTORS MECHANICAL ENGINEERING (Sign and write full name) DEPARTMENT (Signed & stamped) I HCMC UNIVERSITY OF THE SOCIALIST REPUBLIC OF VIETNAM TECHNOLOGY AND EDUCATION Independence – Freedom – Hapiness Falcuty of International Education ----o0o---- Ho Chi Minh City, March 21, 2024 ASSESSMENT FORM OF INSTRUCT LECTURER Full name of student 1: PHAM CONG THUAN Student ID: 19144077 Full name of student 2: TRAN THANH DANH Student ID: 19144064 Full name of student 3: TANG THAI KHANG Student ID: 19144081 Major: Mechanical Engineering Technology Year of admission: 2019 – 2023 Class: 19144CLA Full name Instructor: Assoc. DO THANH TRUNG Thesis name: Study on the durability of flexible moment mechanisms with various type of plastic materials.
Regarding the topic content and implementation volume:. Recommend for defend graduation thesis or not?. ) INSTRUCTORS (Sign and write full name) II HCMC UNIVERSITY OF THE SOCIALIST REPUBLIC OF VIETNAM TECHNOLOGY AND EDUCATION Independence – Freedom – Hapiness Falcuty of International Education ----o0o---- Ho Chi Minh City, March 21, 2024 ASSESSMENT FORM OF DECIPATION LECTURER Full name of student 1: PHAM CONG THUAN Student ID: 19144077 Full name of student 2: TRAN THANH DANH Student ID: 19144064 Full name of student 3: TANG THAI KHANG Student ID: 19144081 Major: Mechanical Engineering Technology Year of admission: 2019 – 2023 Class: 19144CLA Full name Instructor: Assoc. DO THANH TRUNG Thesis name: Study on the durability of flexible moment mechanisms with various type of plastic materials.
Regarding the topic content and implementation volume:. Recommend for defend graduation thesis or not?. ) REVIEW LECTURER (Sign and write full name) III HCMC UNIVERSITY OF THE SOCIALIST REPUBLIC OF VIETNAM TECHNOLOGY AND EDUCATION Independence – Freedom – Hapiness Falcuty of International Education ----o0o---- Ho Chi Minh City, March 21, 2024 GUARANTEE We hereby commit that the research presented in this graduate thesis is done by ourselves. Excerpts and images used in the thesis are attached to their references, which are made public following the rules.
Project Executor Student 1 Student 2 Student 3 Pham Cong Thuan Tran Thanh Danh Tang Thai Khang IV ACKNOWLEDGEMENT After undergoing the process of completing the graduation project for over 3 months, our team has received generous assistance and support from the teachers at the Ho Chi Minh City University of Technology and Education, especially the dedicated guidance and valuable suggestions from Assoc. Do Thanh Trung, Assoc. Pham Son Minh and Prof. Tran Minh The Uyen which greatly benefited our team throughout the project.
We would like to express our deepest gratitude to the teachers. Furthermore, during our 4-year academic journey at the Ho Chi Minh City University of Technology and Education, we also want to express our gratitude to the subject teachers in the Faculty of High-Quality Training and the Faculty of International Education for their dedication in teaching and warm guidance, which has helped all members of our team accumulate a wealth of knowledge and experience to apply to the project and beyond. We are very grateful. Given our limited time and understanding, our team faced various challenges while delving into the research for this project, resulting in inevitable shortcomings.
We sincerely hope to receive feedback from our teachers to enhance the project to the best of our ability. In conclusion, our team wishes the teachers good health to continue their teaching journey. Once again, we sincerely appreciate! Ho Chi Minh City, March 2024 Executed student (Sign and write full name) V ABSTRACT After completing the graduation project on the topic "Study on the durability of flexible moment mechanisms with various types of plastic materials," the research has contributed to a deeper understanding of knowledge in the field of plastic molding, design, and analysis of torsional moment mechanisms, particularly in the techniques and parameters of plastic molding for different types of plastics, measuring and analyzing torsional moments with flexible structures. In this report, the research will present the process steps of implementing this study.
Firstly, the research focuses on the experimental goal of the durability of moment-resistant structures using different materials. The test model includes a moment-resistant structure with the application of common plastic materials such as ABS, PP, PA6, and HDPE, fabricated through plastic injection molding methods. Furthermore, the research also delved into a deeper investigation of the Constant Torsional Moment (CTM) motion mechanism, based on the proposal [1] utilizing spline curves with variable widths, leveraging the flexibility of spline curves to create a CTM capable of adapting to variations in input rotation angles. This brings simplicity and efficiency in generating a flexible mechanism that can be applied in various fields.
VI TABLE OF CONTENTS GRADUATION THESIS PROJECT TASKS. I ASSESSMENT FORM OF INSTRUCT LECTURER .II ASSESSMENT FORM OF DECIPATION LECTURER. VI TABLE OF CONTENTS. VII LIST OF ABBREVIATIONS.
XI LIST OF TABLES. XII LIST OF FIGURES. XIII CHAPTER 1: INTRODUCTION .1 Reason for choosing the topic .3 Object of research scope .4 Approach and research methods .4 CHAPTER 2: THEORETICAL BASIS .1 Overview of flexible moment mechanism .1 What is the flexible moment mechanism? .2 Principle of operation .3 Main characteristics of flexible moment mechanism .4 Application of flexible moment mechanism .2 Overview of mold .2 General structure of mold .3 Overview 2 plate mold .3 Overview of plastic injection molding technology .2 Application of plastic injection molding technology .4 Overview structure of Haitian plastic injection molding system .5 Overview of experimental plastic materials.1 Overview plastic PP .2 Overview plastic PA6 .3 Overview plastic HDPE .4 Overview plastic ABS .6 Torque strength testing machine .3 Principle of operation. Artificial neuron networks in MATLAB .33 CHAPTER 3: DESIGN PRODUCT .1 Research both domestically and internationally .2 Choose soft structure .37 CHAPTER 4: EXPERIMENTAL RESULTS .1 Plastic injection experiment .1 Injection parameters and experimental products of PP plastic .2 Injection parameters and experimental products of PA6 plastic .3 Injection parameters and experimental products of HDPE plastic .4 Injection parameters and experimental products of ABS plastic .2 Experimental measurement equipment .3 Experimental measurement procedure .5 Analyze measurement results.5 Utilizing ANN_neuron network in MATLAB.56 CHAPTER 5: CONCLUSION AND FUTURE DEVELOPMENT .2 Limitations and future development.
65 X LIST OF ABBREVIATIONS CTJM : Constant-torque joint mechanism PP : Polypropylene PA6 : Nylon 6 or polycaprolactam HDPE : High-density polyethylene ABS : Acrylonitrile butadiene styrene CFM : Constant-force mechanism ANN : Artifical neuron networks Pinj : Injection pressure Pform : Forming pressure Tmelt : Melting temperature Tmold : Mold temperature tshap : Shaping time XI LIST OF TABLES Table 2.1: Basic information of plastic PP .3: Basic information of plastic PA6 .5: Basic information of plastic HDPE .7: Basic information of plastic ABS .1: Injection parameters of 4 types of plastic .46 XII LIST OF FIGURES Figure 2.1: Application of CTJM soft structure products .2: General structure of mold .3: Structure of plastic injection molding machine .4: Operating principle of plastic injection machine .5: Haitian MA 1200III plastic injection machine .6: PP plastic pellets .7: Application of PP plastic .8: PA6 plastic pellets .9: Application of PA6 plastic .10: HDPE plastic pellets .11: Application of HDPE plastic .12: ABS plastic pellets.13: Application of ABS plastic .14: Structure of torsional strength tester machine .1: Diagram of distributed compliance model (Type I) .2: Diagram of the distributed compliance model (Type II) .3: Product design drawing .1: PP plastic injection injection parameters .2: Injection parameters of PA6 plastic .3: Injection parameters of HDPE plastic .4: Injection parameters of ABS plastic .5: Product test jig model .6: Jig equipment overview .7: Installation of jigs into experimental machines .8: Laptop connection torque and PLC .9: Moment meter control interface .10: The chart shows the deformation of PP plastic products .11: The chart shows the deformation of PA6 plastic products .12: The chart shows the deformation of HDPE plastic products .13: The chart shows the deformation of ABS plastic products .14: The chart shows the average deformation of 4 plastic products .15: Training result plastic PP .16: Training result plastic PA6 .17: Training result plastic HDPE.18: Training result plastic ABS .19: ANN simulation results and experiments of PP plastic .20: ANN simulation results and experiments of PA6 plastic .21: ANN simulation results and experiments of HDPE plastic .22: ANN simulation results and experiments of ABS plastic .59 XIV CHAPTER 1: INTRODUCTION Chapter 1 of the topic emphasizes an overview of the research content, focusing on the experimental durability of moment-resistant structures using different materials, particularly based on the practical need for torsional strength. Additionally, this chapter introduces the rationale for choosing the topic and describes the importance of experimental research.1 Reason for choosing the topic The selection of the experimental topic on the durability of moment-resistant structures is motivated by several important reasons stemming from practical needs in the field of torsional strength. Here are some specific reasons: 1. Real-world application: The selected topic focuses on a specific and essential issue in the practical context to generate applicable knowledge with value in fields utilizing flexible moment-resistant structures.
Torsional strength: With the increasingly robust development of industry and technological applications, the torsional strength of flexible moment-resistant structures has become a decisive factor in performance and safety across numerous applications. Material diversity: The utilization of common plastic materials such as ABS, PP, PA6, and HDPE enables the research to reflect diversity in applications and material selection for flexible moment-resistant structures depending on the specific project requirements. Experimental research demand: Conducting direct durability tests on flexible moment-resistant structures is essential to gather accurate data and information regarding the performance of materials under real operating conditions. Wide-ranging applications: The outcomes of the project can be applied across various fields such as industry, automation, healthcare, and numerous other applications where flexible moment-resistant structures play a crucial role.
1 The reasons above illustrate the necessity and significance of choosing this experimental topic, guiding the approach and detailed research in the subsequent sections of the project.
