Regional trade agreements HS code mapping

This articleList of contents:

• 1,Regional trade agreements HS code mapping How is the main welding method on high-speed rail cars realized?
• 2, Car body welding process?
• 3, How to weld the structure of the car frame?

How is the main welding method on high-speed rail cars realized?

Stirring friction welding can realize welding between different materials, such as metal, ceramics, plastics, etc. Stirring friction welding is of high quality, not easy to produce defects, easy to achieve mechanization, automation, stable quality, low cost and high efficiency.

Stamping and welding.In the automobile welding process, the welding of all large parts such as the basic body, frame, side circumference, five doors and one cover is completed by this welding process.

Welding rods and welding wires are usually used for welding. ( 2) Pressure welding is to melt the metal by heating the electrode and pressurizing the metal together. Among the various pressure welding methods inherent in 1653, resistance spot welding is the most commonly used welding method in the automobile manufacturing industry.

Car body welding process?

In the production process of cars, the assembly of the car body is a very important step. Body welding is one of the important processes of body assembly, which can usually be divided into main welding and secondary welding. Main welding refers to the welding of important structural parts of the car body, which usually bear key properties such as body load-bearing and earthquake resistance.

During the welding time, the welding current is turned on and passed through the welded metal plate, and then the current is disconnected.

Most of each process is first stamped and formed, and then through punching, edging, edging and other processes, and finally becomes the required workpiece.Welding process: Spot welding is the most widely used in automobile body manufacturing.

How to weld the structure of the car frame?

1. [Pacific Automobile Network] The aluminum body of high-end models is welded with low-temperature aluminum welding rods. The thermal deformation is small and the hardness is high. No large investment is required. Novices can operate it, and it is welded with a liquefied gas porous spray gun.

2. Stamping and welding. In the automobile welding process, the welding of all large parts such as the basic body, frame, side circumference, five doors and one cover is completed by this welding process.

3. Laser composite welding is a combination of laser beam welding and MIG welding technology to obtain the best welding effect and fast bridge with the weld. It is the most advanced welding method at present. Laser compositeThe advantages of welding are: fast speed, small thermal deformation, small thermal impact area, and ensure the metal structure and mechanical properties of the weld.

4, 1 welding method In terms of frame welding technology, modern BMW body repair generally adopts fusion welding, pressure welding and bonding, while welding rod arc welding and oxygen-acetylene gas welding, which once dominated in body repair, should be used cautiously in modern body repair. A. Welding rod arc welding is only used to repair frame bodies and low-carbon steel bodies.