The basic knowledge that needs to be learned in sheet metal processing involves many aspects. Here are some key contents:

　　1. Basic concepts and principles of sheet metal processing

　　Definition: Understand that sheet metal is a comprehensive cold processing process for metal sheets (usually less than 6mm), including shearing, punching/cutting/compositing, folding, riveting, splicing, forming and other steps.

　　Principle: Master the basic principles of sheet metal processing, such as the principle of metal plastic deformation, stamping forming principle, etc.

　　2. Sheet metal material knowledge

　　Type: Familiar with commonly used sheet metal materials, such as cold-rolled steel plates, hot-rolled steel plates, stainless steel plates, aluminum alloy plates, galvanized plates, etc.

　　Properties: Understand the physical and chemical properties of various sheet metal materials, such as strength, hardness, corrosion resistance, processability, etc.

　　Selection: Learn to choose appropriate sheet metal materials based on the use and requirements of the product.

　　3. Sheet metal processing technology and equipment

　　Process: Master the main process steps of sheet metal processing, such as blanking, stamping, bending, welding, surface treatment, etc.

　　Equipment: Be familiar with the equipment commonly used in sheet metal processing, such as shearing machines, stamping machines, bending machines, welding machines, grinding machines, etc., and understand their working principles and operating methods.

　　4. Sheet metal parts design and drawing

　　Design: Understand the design principles and methods of sheet metal parts, including structural design, dimensional design, tolerance design, etc.

　　Drawing: Master the skills of using CAD and other design software to draw sheet metal drawings, including two-dimensional drawings and three-dimensional models.

　　5. Sheet metal parts quality inspection and control

　　Testing methods: Understand the methods and standards for quality testing of sheet metal parts, such as testing of dimensional and geometric tolerances, testing of material properties, testing of welding quality, etc.

　　Control means: Master how to improve the quality of sheet metal parts through process parameter adjustment, equipment precision control and other means.

　　6. Safety and environmental protection knowledge

　　Safe operation: Understand the safety risks and protective measures during sheet metal processing, and strictly abide by safe operating procedures.

　　Environmental protection requirements: Understand the environmental protection requirements and standards during sheet metal processing, such as the treatment of waste water, waste gas, and waste residue.

　　7. Relevant laws, regulations and standards

　　Laws and regulations: Understand the laws and regulations related to sheet metal processing, such as production safety law, environmental protection law, etc.

　　Standards: Be familiar with national and industry standards related to sheet metal processing, such as sheet metal parts quality standards, welding quality standards, etc.