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Custom PEM Series Weld Screw

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Kunshan Hong Yong Sheng Precision Hardware Products Co.,Ltd mainly manufacture precision hardware parts and accessories. Factory direct.
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PEM Weld Screw Manufacturers

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Weld nails, also known as weld studs or welding studs, are specialized fasteners used in welding applications to create secure and permanent connections between metal components. These studs have high strength and rigidity and are designed to be welded directly onto metal surfaces, providing reliable attachment points for subsequent welding operations. Weld nails find application in HVAC (heating, ventilation, and air conditioning) and mechanical systems for attaching ductwork, pipes, and equipment to metal frames, supports, and structural members. They provide a secure connection point for welding, ensuring the integrity and stability of the HVAC or mechanical system. We can customize weld nails based on their specific applications and required strength, with common specifications including diameter, length, and chamfer angle.

About
Kunshan Hong Yong Sheng Precision Hardware Products Co.,Ltd.
Kunshan Hong Yongsheng Precision Hardware Products Co., Ltd. was established in September 2006, is a professional China Custom Weld Screw manufacturer and PEM Weld Screw suppliers, the production of various types of precision parts, PEM series of standard fasteners, non-standard parts of the custom enterprise, the company's production equipment imported from Japan CNC computer numerically-controlled lathes, Taiwan CAM walking knife type high-precision automatic lathes, and various types of auxiliary equipment, precision testing equipment, totaling more than 100 units, monthly output of up to 5 million pieces. Our products are used in many fields such as electronic communications, computer monitors and chassis, automotive parts, 3C household appliances, medical equipment, pneumatic machinery, sports equipment, furniture, lighting, aerospace, military, photovoltaic, intelligent industry and so on, and we have the technical ability to develop new products.
The company has obtained two quality system management certificates of ISO9001:2015 and IATF16949:2016.
At present, the company has been for Japan, Sweden, the United States, Singapore, Malaysia, Hong Kong and the Pearl River Delta and many other customers to provide services, now the main customers are: Japan Sharp (SHARP), Japan SMC, Japan Panasonic (Panasonic), the Swedish automobile VOVOL, etc., all the fixed assets investment of more than 30 million dollars, welcome friends from all walks of life to the factory to visit, study, consulting and come! We welcome friends from all walks of life to visit our factory, investigate, consult and come to us for sample processing.
We are looking forward to establishing a good business partnership with you with mutual trust and reciprocity!
Certificate Of Honor
  • IATF16949:2016
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Weld Screw Industry knowledge

What follow-up treatment is required for weld screws after welding?

Weld screws may require a series of subsequent treatments after welding to ensure that the performance of the welded joint meets specific application requirements. Here are some common post-processing steps:

Heat treatment (stress relief): The welding process creates residual stresses in the weldment that can cause deformation or cracks. Heat treatment is a common method used to eliminate or reduce these stresses. Typically, the weldment is slowly heated to an appropriate temperature (below the critical temperature of the material), held for a period of time, and then cooled slowly. This process helps rearrange the lattice structure and reduce internal stress, thereby improving the dimensional stability of the weldment and preventing cracking.

Non-destructive testing (NDT): After the weld screws are welded, non-destructive testing is a key step to ensure welding quality. Non-destructive testing technologies such as ultrasonic testing (UT), radiographic testing (RT), magnetic particle testing (MT) or penetrant testing (PT) can detect internal and surface defects in welded joints, such as cracks, pores, inclusions and lack of fusion, etc. Each of these inspection methods has advantages, and the choice depends on the material and thickness of the weldment and the required inspection sensitivity.

Surface cleaning: Welding slag, oxides and slag generated by welding need to be completely removed to prevent corrosion and improve the appearance quality of the weldment. This is usually achieved through mechanical methods such as sanding, sandblasting or using chemical cleaners. Surface cleaning also helps the adhesion of subsequent coatings and improves corrosion protection.

Coating Protection: To prevent corrosion in the welded area, the weld screw and its welded area may need to be coated with an anti-corrosion coating. The coating can be paint, powder coating, thermal spray coating or electroplating coating, etc. The choice of coating depends on the working conditions of the weldment and the expected corrosion resistance level. The coating can not only isolate corrosive media, but also improve the wear resistance and aesthetics of the weldment.

Dimensional inspection: The weldment may be deformed during the welding process, resulting in dimensional changes. Therefore, it is very important to check the size of the welding nails after welding to ensure that they meet the design requirements. Dimensional inspections typically include measurements of weld stud diameter, length, and thread size, which can be performed using tools such as calipers, microrules, or a coordinate measuring machine.

Performance testing: Mechanical performance testing of welded joints is an important means to evaluate their load-bearing capacity and durability. Common performance tests include tensile testing, hardness testing and impact testing. Tensile testing can evaluate the strength and ductility of welded joints; hardness testing can quickly evaluate the degree of hardening of the welded area; and impact testing can be used to evaluate the toughness of welded joints under low temperature conditions.

These subsequent processing steps are critical to ensuring the quality and performance of welded joints, helping to improve the reliability and safety of stud welded structures.

What effect does the welding of weld screws have on the base metal?

The impact of weld screw welding on the base metal is multifaceted, and these effects may produce significant changes in the properties of the base metal. The following are several important impact points, each of which is explained in detail:

Formation of heat-affected zone (HAZ): During the welding process, the base metal will undergo thermal cycles under the action of heat, causing changes in the microstructure and mechanical properties of the area near the weld (i.e., the heat-affected zone). In the heat-affected zone, the material may undergo processes such as recrystallization, quench hardening, or annealing, which may cause an increase or decrease in hardness, affecting the toughness and ductility of the material. Control of welding parameters and appropriate post-processing can reduce the adverse effects of the heat-affected zone.

Residual Stress and Distortion: Welding is a process of localized heating and cooling, which produces uneven thermal expansion and contraction in the base metal, resulting in residual stress and distortion. Residual stress may lead to the initiation and propagation of cracks, while deformation can affect the dimensional accuracy and appearance of the structure. These problems can be reduced by adopting a proper welding sequence, using welding methods with low heat input, or performing post-weld heat treatments and corrections.

Changes in material properties: Welding can change the local properties of the base metal. For example, certain alloying elements may be burned out or redistributed during the welding process, causing changes in the chemical composition of the weld and heat-affected zone. This can affect properties such as corrosion resistance, strength and hardness of the material. Selecting matching welding materials and proper welding procedures are critical to maintaining base metal properties.

Crack susceptibility: During the welding process, the base metal may become more susceptible to cracks due to thermal cycling and physical and chemical changes in the material, especially for materials with poor inherent crack resistance. Welding cracks include hot cracks and cold cracks. Their formation mechanisms are different and they need to be prevented by accurately controlling welding parameters, using appropriate welding materials, and performing preheating or post-heat treatment.

Changes in corrosion behavior: Welding can change the local corrosion behavior of the base metal, especially in the weld and heat-affected zone. For example, the burning loss of certain alloying elements may lead to a reduction in the corrosion resistance of the weld; in addition, uneven thermal cycles may lead to uneven corrosion resistance in the heat-affected zone. Selecting appropriate welding materials and post-treatment techniques, such as coating or heat treatment, can improve the corrosion resistance of welded joints.

Effect on machinability: The welded base metal, especially the heat affected zone, may become more difficult to machine. This may be due to an increase in hardness or changes in microstructure. In some cases, annealing or other heat treatment may be necessary to restore the material's processability.

By comprehensively considering these effects and taking appropriate welding technology and post-processing measures, the adverse effects of welding on the base metal can be minimized and the performance of the welded structure can be ensured to meet application requirements.