The core function and value of screws
Tightening connection: firmly connect two or more parts (which can be metal, plastic, wood, etc.) together.
Positioning and alignment: Ensure that the parts are in precise relative positions during assembly, ensuring the accuracy and performance of the equipment.
Transmission of power: In applications such as screw systems, rotational motion is converted into precise linear motion.
The main types of screws and their applicable scenarios
By head type: hexagonal head, Allen, Phillips, straight groove, Torx, etc. The choice depends on the installation tool and the required torque.
According to thread type: mechanical thread screws (used for pre-set nuts or threaded holes), self tapping screws (used for wood, plastic, thin metal, can self tap threads).
According to material and surface treatment: carbon steel, stainless steel (corrosion-resistant), alloy steel (high-strength), copper, titanium alloy, etc. Surface treatments such as galvanizing, nickel plating, Dacromet, etc. can enhance rust prevention and aesthetic performance.
The specific application of screws in various industries
1. Construction Engineering and Infrastructure Construction
This is one of the areas with the highest screw consumption, requiring extremely high strength and corrosion resistance.
Structural fixation: High strength bolts are used to connect beams and columns of steel structures, and are the "skeletal joints" of skyscrapers, bridges, and sports venues.
Curtain Wall and Decoration: Stainless steel screws are used to fix glass, aluminum curtain walls, and various decorative panels indoors and outdoors.
Pipeline and electromechanical installation: used to fix water pipes, air ducts, cable trays, distribution boxes, etc.
2. Automotive industry
A modern car is composed of tens of thousands of parts, among which the number of screws can reach thousands.
Engine and gearbox: Use high-strength, high-temperature resistant special screws to withstand extreme internal stress and thermal loads.
Chassis and suspension system: High precision bolts are used to connect critical safety components such as wheels and suspension arms, requiring extremely high fatigue and shear resistance.
Interior and body: Various self tapping screws and plastic buckles are used to secure the dashboard, seats, door panels, headlights, etc.
3. medical device There are strict requirements for the biocompatibility, cleanliness, and corrosion resistance of screws.
Medical equipment: Stainless steel (such as 316L) or titanium alloy screws are used for large equipment such as CT machines and surgical tables.
Implants: Bone plates and screws used in orthopedic surgery must be compatible with human tissue and must not produce rejection reactions.
4. Aerospace and high-end equipment
This is the most demanding field for screw performance, which is related to life safety.
Aircraft structure: Special bolts made of titanium alloy, high-strength alloy steel and other materials, lightweight and extremely strong, used to connect wings, fuselage skin, landing gear, etc.
Spacecraft: Screws must be able to withstand extreme temperature changes, vacuum environments, and severe vibrations, and must meet extremely high reliability standards in materials and processes.
6. Electronic and Electrical Manufacturing Industry
Consumer electronics: Mobile phones, laptops, and tablets use a large number of miniature screws (such as Pentalobe screws commonly used in Apple products) inside, which usually require non-magnetic and rust proof properties.
Household appliances: From fixing the washing machine casing to connecting the refrigerator compressor, various specifications of screws ensure the structural stability and long-term operation of the appliances.
PCB board fixation: Use screws with insulated washers to secure the circuit board inside the chassis to prevent short circuits.
5. Furniture and Home Decoration
Panel furniture: Eccentric connectors (such as three in one connectors) combined with screws achieve fast disassembly and assembly of furniture (KD structure).
Solid wood furniture: Wood screws are used for reinforcing or directly connecting traditional mortise and tenon structures.
Home installation: Expansion screws are used to firmly fix items on concrete walls, such as hanging cabinets, curtain rods, televisions, etc.
