If there is no relevant basic knowledge, it is best to start with simple descriptive geometry. This is the arrangement of our university. Mechanical knowledge should be based on good drawing knowledge. Because even a simple screw has many representations in the drawing.

Descriptive geometry

Recommendation: There are many descriptive geometry textbooks, all of which can be used. You can look for it online, and there are many bookstores. Books are recommended.

Mechanical painting

Then there is mechanical drawing. Descriptive geometry teaches the concept of graphics, while mechanical drawing really teaches drawing pictures. Many books in the bookstore are bound together by these two books. Not bad either.

Theoretical mechanics and material mechanics

Then "theoretical mechanics" and "material mechanics" teach you how to calculate strength, calculate stress problems and so on.

Mechanical principle, mechanical foundation

Then there are "mechanical principle" and "mechanical foundation", which are the detailed theory and technology, manufacturing and design methods of starting machinery.

Professional theory

When this is done, the foundation will be done. What I want to strengthen is to learn professional theories, such as engine theory, lathe design, CNC machining and so on.

Public * * * foundation

Descriptive geometry, mechanical drawing (engineering drawing), theoretical mechanics and material mechanics are all public. Those who don't learn machinery, such as architecture, automobiles, bridges and road construction, must learn.