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Descriptive Geometry

Course developers

Replaced course

VidEB011 [GVIEB011] Descriptive Geometry

Course abstract

The aim of the study course is to create and develop geometrical logic, spatial thinking and imagination. The basic method used in course framework is the graphical method. The students get thought to draft and read drawings what is the international graphical method and means of expression of constructive thought.

Learning outcomes and their assessment

• Knowledge - understands the projection method, view, and section view building principles. Knows solving methods of metric and positional tasks. Have a good knowledge of design of different geometrical shapes and its flat pattern views. Understands the concept of using auxiliary planes in topographical and central projections - graphical works, tests.
• Skills – can select the right method for solving metric and positional tasks. In practical tasks can use auxiliary planes in construction of different views. Students can plan fills and cuts of site terrain and construct the borderlines. Student can construct buildings in central projections - graphical works, tests.

• Competence – ability to apply professional knowledge of descriptive geometry and drawing skills in practical work and studies - tests, exam.

Course Content(Calendar)

1. Introduction. Drawing technique. Engineering lettering. Complex drawing. Projection methods (lecture 1 h, laboratory work 2 h).
2. Point orthogonal and axonometric projections (lecture 1 h, laboratory work 2 h).
3. Line orthographic projections (lecture 1 h, laboratory work 2 h).
4. Plane orthoggraphic projections. Point and line in the plane (lecture 1 h, laboratory work 2 h).
5. Change of projection planes (lecture 1 h, laboratory work 2 h).
6. Intersection of prism and plane. Determining the true size of the cutting section of a prism. Development of a prism. Axonometric projections of a prism (lecture 1 h, laboratory work 2 h).
7. Intersection of pyramid and plane. Determining the true size of the cutting section of a pyramid. Development of a pyramid. Axonometric projections of a pyramid (lecture 1 h, laboratory work 2 h).
8. Intersection of cylinder and plane. Determining the true size of the cutting section of a cylinder. Development of a cylinder. Axonometric projections of a cylinder (lecture 1 h, laboratory work 2 h).
9. Intersection of cone and plane. Determining the true size of the cutting section of a cone. Development of a cone. Axonometric projections of a cone.. Axonometric projections (lecture 1 h, laboratory work 2 h).
10. Intersection of pair of solids. Test work (lecture 1 h, laboratory work 2 h).
11. Orthographic views. Principles of dimensioning. Complex drawing and axonometric projections of real detail (lecture 1 h,
laboratory work 2 h).
12. Sectional views. Half section. Quarter section (lecture 1 h, laboratory work 2 h).
13. Surface texture. Offset, aligned sections and axonometric projections in drawing of real detail (lecture 1 h, laboratory work 2 h).
14. Representation of threaded parts. Sketch of lathed detail (lecture 1 h, laboratory work 2 h).
15. Weldes assembly drawings (lecture 1 h, laboratory work 2 h).

16. Types of drawings. Bill of materials. Assembly drawings. Test work (lecture 1 h, laboratory work 2 h).

Requirements for awarding credit points

Development and theoretical justification of 12 graphical tasks and 2 independently-excutable graphical tasks. Passed 2 tests and Exam.

Description of the organization and tasks of students’ independent work

The graphical tasks in the laboratory work must be complete independently, in accordance with the conditions specified in the laboratory work. Theoretical justification of the solution to graphical task takes place after its completion, during laboratory work.
1. independently-excutable graphical work – intersection of pair of solids.

2. independently-excutable graphical work – metrical tasks.

Criteria for Evaluating Learning Outcomes

The evaluation of the study course consists of the arithmetic mean evaluation of the graphic works of the study course, the arithmetic mean evaluation of the tests and the evaluation of the exam.
A student obtains a successful grade for a graphic work if the work is defended and at least 60% of the conditions for the development of the work are met.
A student will get a successful mark on the exam and tests if at least 40% of the tasks are properly solved.

Compulsory reading

1. ČukursJ., Aumale M., Nulle I. Tēlotāja ģeometrija. Rīga: RaKa, 2004. 233 lpp.
2. Čukurs J., Viļumsone I., Nulle I. Inženiergrafika: mācību grāmata. Mašīnbūves rasēšana. Rīga: RaKa, 2007. 258 lpp.
3. Čukurs J., Nulle I., Dobelis M. Inženiergrafika: mācību grāmata. Jelgava: LLU, 2008. 416 lpp.

4. Čukurs J., Vronskis O. Tehniskā grafika: mācību grāmata. Rīga: RaKa, 2008. 265 lpp.

Further reading

1. Čukurs J., Nulle I. Tēlotāja ģeometrija un inženiergrafika: kontroldarbu uzdevumi un metodiskie norādījumi TF un PTF nepilna laika studentiem. Jelgava: LLU, 2009.

2. Čukurs J., Vronskis O. Tehniskā grafika: Grafisko darba uzdevumu krājums. Rīga: RaKa, 2010.

Notes

The study course is included in the compulsory part of the academic bachelor’s study program “Agricultural Engineering” and professional higher education bachelor’s study program " Machine Design and Manufacturing " of the Faculty of Engineering. 1st study year 1st semester.