This course deals with the top-down design utilizing 3D CAD through some mechanical design tasks:
concept design -> selection of machine elements and engineering calculation -> stepwise refinement of geometry design using a 3D CAD -> drawing
More precisely, the course first covers the basic workflow the top-down design: freehand concept sketching, determining technical specifications, determining the hierarchic structure of all parts composing the system, skeletal modeling of the system and examination of structural and kinematic behavior, and detailed geometric modeling the the parts.
The course next deals with the design steps of a pantograph jack for vehicle: determination of the specifications including the power source, machine elements, and mechanisms; concept design; technical calculation; defining the geometries and their hierarchic structure on a 3D CAD; and eventually preparing mechanical drawings and reports.
concept design -> selection of machine elements and engineering calculation -> stepwise refinement of geometry design using a 3D CAD -> drawing
More precisely, the course first covers the basic workflow the top-down design: freehand concept sketching, determining technical specifications, determining the hierarchic structure of all parts composing the system, skeletal modeling of the system and examination of structural and kinematic behavior, and detailed geometric modeling the the parts.
The course next deals with the design steps of a pantograph jack for vehicle: determination of the specifications including the power source, machine elements, and mechanisms; concept design; technical calculation; defining the geometries and their hierarchic structure on a 3D CAD; and eventually preparing mechanical drawings and reports.
This course introduces a preferable workflow of 3D CAD-based mechanical design, calculation by Excel, particularly focusing
on freehand sketching, hierarchical tree of parts/assemblies, skeletal 3D modeling, and rules of constraints to facilitate
(re-)configuration of the modelled parts. Students are expected to make the concept of a machine from given problems, to realize
the machine, and to provide drawings and other design evidence to convey the design intention.
Through the course, students must be encouraged to take the initiative in mechanical design by themselves, not just tracing existing machine design.
Through the course, students must be encouraged to take the initiative in mechanical design by themselves, not just tracing existing machine design.
- From a given design project (a pantograph jack), students should be able to recognize needs in real world customers, to ideate a concept, to prepare freehand concept sketches, a parts list tree, and establish quantified specifications.
- Students should be able to create and present a assembled model of a machine in a top-down approach: starting from an overall design using central skeleton/layout model, increase the features (detailing) in a phased manner.
- Student should be able to model parts or assemblies including features and constraints that have low dependence on the geometry(shape) of the parts/assemblies themselves.
| Class schedule | HW assignments (Including preparation and review of the class.) | Amount of Time Required | |
|---|---|---|---|
| 1. | Guidance Lecture: Introduction to modeling and design processes ・understand function of Excel |
Identification of needs for pantograph jack | 90minutes |
| 2. | Remind of Industrial Mechanics and Mechanics of Material | Remind Industrial Mechanics and Mechanics of Material | 240minutes |
| 3. | Confirmation Mechanical elements | Read text book 2.3 | 180minutes |
| 4. | Specification of Vehicle and Design factor | Considering specification | 240minutes |
| 5. | Draw schematics mechanism | operate text book 3.1 | 240minutes |
| 6. | Presentation design spec | Write specification design | 240minutes |
| 7. | Design screw rod | Read text book 3.2 | 180minutes |
| 8. | Draw components figure of screw rod and bracket | Re-confirm strength screw rod | 240minutes |
| 9. | Design arm and pin | Read text book 3.3 | 180minutes |
| 10. | Consideration Human factor | Read text book 3.4 | 180minutes |
| 11. | Draw sub assembly construction of rod | Confirm parts of rod | 240minutes |
| 12. | Draw sub assembly construction of arm | Confirm parts arm | 240minutes |
| 13. | Draw complete construction | Confirm sub assembly construction draw | 240minutes |
| 14. | Final presentation | Complete drawing | 240minutes |
| Total. | - | - | 2970minutes |
| Mid-Presentaion | Final presentation | Submissions | Total. | |
|---|---|---|---|---|
| 1. | 20% | 10% | 10% | 40% |
| 2. | 0% | 20% | 10% | 30% |
| 3. | 0% | 0% | 30% | 30% |
| Total. | 20% | 30% | 50% | - |
Grading will be decided based on Submissions(50%) and Presentation(50%)
Purchase a textbook.
Prepare USB memory
try Excel
Students should be acclimated to create a parts, assemblies and drawings with Autodesk Inventor.
Prepare USB memory
try Excel
Students should be acclimated to create a parts, assemblies and drawings with Autodesk Inventor.
- Questions and comments will be accepted during class.
- Course that cultivates a basic problem-solving skills
Last modified : Wed Oct 17 06:23:41 JST 2018