2018 Machine Design and Drawing

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Academic unit or major
Undergraduate major in Mechanical Engineering
Okawa Seiji  Hirata Atsushi  Akasaka Hiroki  Hirata Yuki  Takahashi Hideaki  Okui Masaru 
Course component(s)
Exercise /Experiment     
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Course description and aims

Mechanism design of the movable part of the bending machine, assembly drawing, a parts drawing are studied. Design calculation of a development and drafting are performed to produce a cover of a motor section by sheet metal bending. Bending of sheet metal is different from folding a paper. It is due to the thickness and curvature of metal sheet. The design need to be carried out with various considerations such as margins. So, it is consistent from a design to processing, and a whole design-drafting-processing is mastered.

Student learning outcomes

Arrival target is to develop the knowledge obtained through “MEC.H201: Machine Elements and Machine Drawing”, “MEC.H212: Fundamentals of Machine Design and Drawing”, and learn various points to take care when it actually connects to the processing, and to acquire the design method of basic machine element and a mechanical drawing.
Theme of this lecture is to learn the basics of sheet metal processing, to design a sheet metal processing and a cover of motor as an example, to make a development and etc. using CAD/CAM and to obtain the understanding of the basics of the relation between design, drawing and processing through the sheet metal processing.


Sheet metal processing, Design calculation, Development drawing, Assembly drawing

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

In the classes, students will be given exercise problems related to the lecture such as design calculations, design drawing, assembly drawing.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Orientation, Basis of sheet metal processing (lecture), Explanation of a design problem, Exercise on sheet metal processing Exercise on sheet metal processing
Class 2 Factory Tour Sheet metal processing machine, Laser processing machine Questionnaire
Class 3 Design calculation Design of a back gauge and its cover Determination of design specification 1. Design of a stretch 2. Design of a rack and pinion 3. Design of a shaft 4. Design of power 5. Design of a belt and a pulley(1) Various design calculations 1. Design calculation of a stretch 2. Design calculation of a rack and pinion 3. Design calculation of a shaft 4. Design calculation of power
Class 4 Selection of a motor (lecture and design calculation) 1. Design of a belt and a pulley(2) 2. Calculation of inertia 3. Load torque 4. Power (running, acceleration) 5. Effective torque 1. Design calculation of pulley 2. Supporting documents for the selection of a motor
Class 5 Design of a cover, making of an assembly drawing 1. Assembly drawing (the third angle) Each group select dimensions a, b, c, d, e, and draw it by hand 2. Design Drawing method Rule on drawing The actual object and the third angle drawing A bird's-eye view and Assembly drawing
Class 6 Sheet metal development (lecture and calculation), development drawing by CAD 1. Basics of development The necessity of the development, the value of a margin, development length calculation method (outer dimensions) 2. Example of a development drawing Design calculation of a development (exercise) Exercise 1: Calculation method of outer dimensions Exercise 2: Butt pattern of box product (single sliding) Design calculation of a development (exercise)
Class 7 Development drawing Supplementary explanation of the calculation of development Development drawing
Class 8 Description and example of CAD/CAM in sheet metal processing, Verification of a complete development Design drawings and the basis for the design


A text (pdf file) is distributed by ocwi.

Reference books, course materials, etc.


Assessment criteria and methods

By the submission of such as design calculations, design drawings, degree of understanding about the sheet metal design and the completeness of the drafting are evaluated.

Related courses

  • MEC.H201 : Machine Elements and Machine Drawing
  • MEC.H212 : Fundamentals of Machine Design and Drawing

Prerequisites (i.e., required knowledge, skills, courses, etc.)

60 of equipment will be used for exercise. Priority is given to the students of 3rd of Mechanical Engineering.
Students should have basic knowledge on machine elements, machine drawing and machine drawing.

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