The term "Machine elements", literally, refers to the elements responsible for the functions required in the machine as well
as configure the machine. The machine elements have diverse functions to play such as fixation, supporting, guiding, transmission,
control, seal, and lubrication. These functions should have in common a variety of products. For this reason, the mechanical
element has been developed as a component that can be used in common when performing the mechanical design, and is still evolving
now.
Understanding the machine element is an element of machine design, because a mechanical designer must understand the basic structure and operating principle of the machine elements and must select a suitable element. On the other hand, to learn about the history, type, production process, design method and selection method and evaluation method of machine elements themselves are also useful in the design of a variety of industrial products as well as machinery.
In other words, understanding of the mechanical elements, not end to the understanding of the machine parts, it leads to increase the ability of understanding and designing a machine.
This class will focus on various mechanical elements and their actual use. To learn what are and how to use such machine elements systematically will be the basis of mechanical design. It also becomes the basis for understanding the novel machine elements and machines. In addition, long history and diversity of the four machine elements will help understand the product design in a broad sense.
Understanding the machine element is an element of machine design, because a mechanical designer must understand the basic structure and operating principle of the machine elements and must select a suitable element. On the other hand, to learn about the history, type, production process, design method and selection method and evaluation method of machine elements themselves are also useful in the design of a variety of industrial products as well as machinery.
In other words, understanding of the mechanical elements, not end to the understanding of the machine parts, it leads to increase the ability of understanding and designing a machine.
This class will focus on various mechanical elements and their actual use. To learn what are and how to use such machine elements systematically will be the basis of mechanical design. It also becomes the basis for understanding the novel machine elements and machines. In addition, long history and diversity of the four machine elements will help understand the product design in a broad sense.
This course deals with the history, types, usage and installation method and applications of machine elements to help students
obtain a broad understanding of them that helps general product design.
It also covers with mechanical principles, strengths and safety of such four kinds of machine elements to help students obtain a deep understanding of them that helps basic machine design.
It also covers with mechanical principles, strengths and safety of such four kinds of machine elements to help students obtain a deep understanding of them that helps basic machine design.
- Students should be able to describe and express mechanical design visually or analytically, and to design machines that can optimally constrain objects or themselves.
- Students should be able to explain the history, applications, and how to use machine elements.
- Students should be able to select a machine element and to assess whether the chosen machine elements meet the required specifications.
| Class schedule | HW assignments (Including preparation and review of the class.) | Amount of Time Required | |
|---|---|---|---|
| 1. | Expression in mechanical design 1: engineering calculation tables ○Format of tables of engineering calculation ○Rules of engineering calculation tables ○Exercise (Table creation) |
Textbook Section 1.1~1.4 | 190minutes |
| 2. | Expression in mechanical design 2: freehand mechanical drawing ○Mechanical drawing and freehand drawing ○Rules of mechanical drawing ○Exercise (Design of attachment part) |
Textbook Section 1.5, 2.4 ~ 2.7 | 190minutes |
| 3. | Expression in mechanical design 3: tolerances and constraints ○Tolerances: fits and assembly ○Exact constraints design |
Textbook Chapter 1 | 190minutes |
| 4. | Screws 1: standards ○History of fastening systems and screws ○Types and standards of screws ○Exercise(Screws and threaded holes) |
Textbook Section 3.1 | 190minutes |
| 5. | Screws 2: mechanics ○Mechanics of screws ○Design of bolted joints ○Exercise(Torque method) |
Textbook Section 3.2 | 190minutes |
| 6. | Shafts ○Types of shafts (axles, spindles). ○Determination of shaft diameter (based on strength, stiffness, critical speeds) ○Types and selection of couplings, keys, splines, retaining rings ○Exercise(shaft diameter determination, parts selection) |
Textbook Chapter 4 | 190minutes |
| 7. | Bearings ○Definition and characteristics of bearings ○Ball bearing lifetime calculation ○Exercise(Bearing lifetime calculation) |
Textbook Chapter 4 | 190minutes |
| 8. | Mid-term exam | Review the contents learned by now. | 130minutes |
| 60minutes | |||
| 9. | Linear guides ○Types of linear guides ○Calculation of lifetime ○Exercise (Chapter 9, Ex1) |
Textbook Section 5.5 Textbook Section 9.1 ~ 9.2 |
190minutes |
| 10. | Ball screws ○Types of ball screws ○Efficiency and Preloading ○Speed and load limits ○Exercise (Chapter 9, Ex2) |
Textbook Section 6.4 Textbook Section 9.3 ~ 9.5 |
190minutes |
| 11. | Gears ○Definitions of gears ○Teeth dimensions, contact ratio, Backlash and profile shift ○"Glue" method to determine reduce ratio ○Exercise (gear reducer) |
Textbook Chapter 5, Section 6.2.13 | 190minutes |
| 12. | Wrapping transmissions ○Various chain and belt drives ○Design of toothed belt transmission ○Exercise (1-axis linear table) |
Textbook Section 6,2 ~ 6.3 | 190minutes |
| 13. | Actuators ○Motors and motor selection (based on equivalent moment of inertia) ○Selection of coupling ○Exercise (Chapter 9, Ex3) |
Textbook Section 9.6 | 190minutes |
| 14. | Term-end exam | Review the contents learned by now. | 300minutes |
| Total. | - | - | 2770minutes |
| Mid-term Exam | Final Exam | Total. | |
|---|---|---|---|
| 1. | 10% | 10% | 20% |
| 2. | 10% | 20% | 30% |
| 3. | 20% | 30% | 50% |
| Total. | 40% | 60% | - |
The final grade will be calculated according to short-term exam (40%) and term-end exam (60%).
This course will give a pass mark (60 points) to students who have successfully found methods for engineering calculation from the textbook and literature and have provided appropriate design values with appropriate bases.
This course will give a pass mark (60 points) to students who have successfully found methods for engineering calculation from the textbook and literature and have provided appropriate design values with appropriate bases.
- There will be a time open for discussion after each class (10 ~ 20 min).
- Course that cultivates a basic problem-solving skills
| Work experience | Work experience and relevance to the course content if applicable |
|---|---|
| Applicable | Experience in development of lab apparatus, and product development in a startup company. |
- 8.DECENT WORK AND ECONOMIC GROWTH
- 9.INDUSTRY, INNOVATION AND INFRASTRUCTURE
Last modified : Fri Mar 18 23:49:47 JST 2022