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What manufacturing processes are used for safety steel doors?

As an important part of building safety, the design and manufacturing process of steel doors for security are directly related to the safety of people's lives and property. With the progress of technology and the continuous improvement of safety standards, steel doors for security have shown a high degree of professionalism and rigor in material selection, structural design, processing technology, surface treatment and performance testing. This paper will discuss the manufacturing process of steel doors for security, in order to provide reference for the relevant industry.

1. Material selection
The core of the safety steel door is "steel", and high-quality steel is the basis for ensuring the strength and durability of the door body. High strength grade steel is usually selected as the base material, which has good mechanical properties and weldability. For fire steel doors for security, it is also necessary to use special steel with high temperature resistance, and fill the inside of the door with fireproof materials, such as rockwool or aluminum silicate fiber, to enhance its fire resistance.

2. Structural design
The design of steel doors for security needs to consider anti-theft, fire prevention, bulletproof and other security needs. The structure usually adopts the frame plate structure, the frame provides the overall support, and the door plate is selected according to the specific safety level requirements of different thickness of the steel plate. The connection between the door frame and the door flap uses high-strength hinges and a multi-point locking system to ensure tightness and firmness when closed. For special needs, emergency escape devices and automatic closing devices will also be designed to meet the evacuation and protection requirements in emergency situations.

3. Processing technology
Cutting and forming
First, the steel is precisely cut using a high-precision laser cutting machine or plasma cutting machine to obtain the desired shape of the door frame and door panel. The cut steel plate is then bent through a bending machine into the desired frame structure, ensuring that the dimensions of each component are accurate.

Welding is a key step in the manufacture of steel doors for security, which directly affects the overall strength and stability of the door body. Precision welding with automatic welding equipment, such as gas shielded welding or argon arc welding, ensures uniform, strong and beautiful welds. After welding, stress removal is carried out to reduce welding deformation and improve the service life of the door body.

4. Surface treatment
In order to improve the corrosion resistance and aesthetic appearance of steel doors for security, surface treatment is crucial. Common treatment methods include sand blasting, phosphating, electrostatic spraying or hot dip galvanizing. Electrostatic spraying can form a uniform and dense coating on the surface of the door body, which is not only rich in color, but also strong in weather resistance. Hot-dip galvanizing can provide a higher level of corrosion protection, suitable for outdoor or harsh environment steel doors for security.

5. Performance test
Steel doors for security must pass strict functional and performance tests before leaving the factory, including but not limited to impact test, fire test, anti-theft test, sound insulation test, etc. For example, by simulating the theft tool attack to check the anti-theft performance of the door; Carry out fire resistance time test to ensure that the corresponding fire rating requirements are met. Only secure steel doors for security that have passed all tests can enter the market to ensure the safety of users.

To sum up, the manufacture of steel doors for security is a complex process integrating material science, structural engineering, precision machining and quality control. From the selection of materials to the finished product, every step reflects the manufacturer's ultimate pursuit of safety and strict control of quality. With the continuous progress of science and technology, the manufacturing process of steel doors for security will continue to be optimized to adapt to higher safety standards and a wider range of application scenarios, and contribute to building a safer living and working environment.

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