What are the difficulties in mechanical design?

Important and difficult points of mechanical manufacturing foundation;

Part of heat treatment of metallic materials and steel;

1. Master the mechanical properties of various metal materials;

2. Master the role of various heat treatment methods.

Part II Limit Fit and Technical Measurement:

1. Master the principle and calculation of dimensional tolerance and form and position tolerance;

2. Master the selection and use of common measuring tools.

Three basic knowledge of metal cutting:

Master the basic knowledge of cutting and apply it to improve cutting.

Four processing processes:

1. Formulation of machining process regulations and process documents;

2. Structural manufacturability of parts;

3. The concept, application and orientation of benchmark;

4. Calculation of process dimension chain;

5. Processing quality analysis;

6. Processing technology and equipment of several basic types of parts.