Custom Office Chair Components Manufacturers

Does the welding process (such as argon arc welding and laser welding) of the metal parts of ergonomic office chair accessories achieve no false welds and no deformation? What is the stress relief process after welding?

1. Technical path for welding process to ensure no false welds and no deformation
In the welding of metal parts of ergonomic office chair accessories, argon arc welding and laser welding are two commonly used processes. They each have unique technical advantages and implementation methods in avoiding false welds and deformation.
Argon arc welding uses high-purity inert gas argon as a protective medium to form a stable gas protection layer around the arc, effectively isolating the air from the welding pool, thereby ensuring the welding quality and avoiding false welds caused by oxidation and other factors. During the welding process, the arc burns stably, the heat is concentrated, and the welding heat input can be accurately controlled. When welding the metal parts of ergonomic office chairs, technicians will accurately adjust the current, voltage, welding speed and other parameters of argon arc welding according to the material, thickness and other characteristics of the parts. For example, for thinner metal sheet parts, a smaller current and faster welding speed are used to reduce the range of the heat-affected zone and reduce the possibility of component deformation; for thicker parts, multi-layer and multi-pass welding is used to disperse the welding heat while ensuring welding strength to avoid local overheating and deformation. Professional welding operators have undergone rigorous training and are proficient in welding techniques. They can adjust the welding gun angle and wire feeding speed in time according to the actual welding situation to ensure that the weld is uniform and full and eliminate the phenomenon of false welding.
Laser welding uses a high-energy-density laser beam as a heat source, which has significant characteristics such as concentrated energy, fast welding speed, and small heat-affected zone. When welding the metal parts of ergonomic office chairs, the laser beam can instantly melt and fuse the metal material. Since the heat is concentrated in a very small area, the thermal impact on the surrounding materials is greatly reduced, effectively reducing the risk of component deformation. Moreover, laser welding has extremely high precision and can achieve micron-level welding. For some metal parts with complex structures and high dimensional accuracy requirements, such as the metal chassis connectors of office chairs, it can accurately complete welding, ensure the quality of the welding joints, and avoid false welding. In addition, the laser welding equipment is equipped with an advanced control system, which can accurately control the laser power, pulse width, frequency and other parameters. According to different metal materials and welding requirements, personalized welding process parameters can be formulated to ensure the stability and reliability of welding quality.
Zhejiang Lubote Plastic Technology Co. , Ltd., with its advanced production equipment and professional production technology team, can give full play to the advantages of argon arc welding and laser welding. The high-precision welding equipment introduced by the company has intelligent parameter adjustment and monitoring functions, which monitors key parameters such as welding current, voltage, temperature, etc. in real time during the welding process. Once an abnormality is found, it will immediately alarm and automatically adjust to ensure the stability of the welding process. The technical team will conduct strict process verification and optimization on the welding process of each batch of metal parts, simulate the actual use conditions to conduct mechanical property tests, analyze the strength, toughness and other indicators of the welded joints, and continuously adjust the welding parameters to achieve the best welding effect, so as to ensure that the metal parts of the office chair components are free of false welding and deformation during the welding process.
2. Stress relief process after welding
After the metal parts are welded, residual stress will be generated inside the parts due to local uneven heating and cooling during the welding process. If these residual stresses are not eliminated in time, they will reduce the fatigue strength, dimensional stability and service life of the parts, and may even cause serious problems such as cracking during use. Therefore, Zhejiang Lubote Plastic Technology Co., Ltd. has developed a scientific and rigorous stress relief process for metal parts of office chair components.
The first is stress relief annealing. The welded metal parts are placed in a heat treatment furnace, heated to an appropriate temperature range (generally lower than the recrystallization temperature of the metal) at a certain heating rate, and kept at this temperature for a certain period of time. In this process, the atoms inside the metal gain enough energy and begin to perform tiny thermal movements, allowing the residual stress to relax and release. The control of the heating rate is crucial. Too fast heating will cause new thermal stress inside the parts, while too slow heating will reduce production efficiency. The determination of the holding time needs to be comprehensively considered based on factors such as the material, size and welding process of the parts to ensure that the stress can be fully eliminated. For example, for metal parts with larger size and thicker material, the holding time will be extended accordingly. After stress relief annealing, the temperature of the component is reduced to room temperature by slow cooling. The cooling process also needs to strictly control the cooling rate to avoid new stress due to uneven cooling.
Vibration aging is also one of the commonly used stress relief methods. The welded metal parts are installed on the vibration aging equipment, and the parts are resonated by the exciter. During the resonance process, the residual stress inside the component and the vibration stress are superimposed on each other. When the stress reaches a certain level, the metal lattice produces a small plastic deformation, so that the residual stress is released and homogenized. The vibration aging equipment can automatically adjust the magnitude, frequency and vibration time of the excitation force according to the material, size and weight of the component. Generally speaking, for metal parts with greater rigidity, a larger excitation force and an appropriate vibration frequency are required; for thinner and softer parts, a smaller excitation force and a higher vibration frequency are used. During the vibration aging process, the vibration response of the component is monitored in real time through sensors, and the vibration parameters are adjusted according to the monitoring data to ensure the optimization of the stress relief effect.
In addition to the above two main stress relief methods, the company also performs stress detection on the treated metal parts. Advanced stress detection equipment, such as X-ray stress analyzers, are used to accurately measure the residual stress in different parts of the components to determine whether the stress relief has achieved the expected effect. If the detection finds that the stress in some areas has not been completely eliminated, stress relief annealing or vibration aging treatment will be performed again according to the specific situation until the stress is reduced to a safe range.
After strict welding process control and perfect stress relief treatment process, the metal parts of ergonomic office chair accessories produced by Zhejiang Lubote Plastic Technology Co., Ltd. are fully guaranteed in quality and performance. These high-quality metal parts cooperate with other parts such as nylon bases and plastic backrests produced by the company to create office chair products with ergonomic design and excellent quality. Whether in terms of product safety, comfort or service life, it can meet customer needs, reflecting the company's professional strength in plastic technology research and manufacturing, as well as strict control of product quality and the spirit of pursuing excellence.