As the only equipment supplier in China with 28 years of experience in the SMT industry, integrating the research and development and manufacturing of electronic component surface mounting welding and intelligent transmission equipment, we have witnessed the upgrading of countless equipment. Today, I can’t help but share with all professional SMT engineers a dazzling equipment – Online N2 Vacuum Reflow Oven, which represents the cutting-edge level of SMT welding technology and can bring many surprises to our work.
A leap in welding quality
One of the biggest highlights of this vacuum reflow oven is that it can weld electronic components in a vacuum environment, and is equipped with a nitrogen filling device to achieve extremely low oxygen concentration. This feature has an immediate effect on improving welding quality. First of all, it can significantly improve the electrical performance and welding joints of the product, greatly enhancing the reliability of the welding point. In actual production, we often have headaches about the quality of welding points. Cold welding and other conditions will seriously affect the stability and service life of the product. This equipment reduces the occurrence of these problems at the root by optimizing the welding environment, thus ensuring product quality.
Secondly, it can significantly reduce the bubbles in the solder and control the void rate to an extremely low level of ≤1 – 2%. The presence of voids will weaken the mechanical strength and electrical performance of the solder joints, which is intolerable in electronic products with high reliability requirements. With this vacuum reflow oven, we can effectively solve this problem and produce higher-quality products.
Flexible and controllable process parameters
For professional SMT engineers, the controllability and flexibility of the equipment are crucial. This vacuum reflow oven performs very well in this regard. Its parameters, such as vacuum degree, vacuum holding time, release time, and vacuum pumping rate, can be freely set. We can easily adjust to the best welding parameter combination according to different welding process requirements and product characteristics. This flexibility enables the equipment to adapt to various complex welding scenarios, whether it is the welding of small precision components or the assembly of large circuit boards.
At the same time, the equipment is also equipped with a high-efficiency flux recovery device, which can effectively prevent flux residue. Flux residue not only affects the appearance of solder joints but may also hurt the long-term reliability of circuit boards. With this recycling device, we don’t have to worry about the problem of flux residue, which further improves the welding quality and product reliability.
Excellent equipment performance parameters
From the perspective of the various performance parameters of the equipment, it is also full of highlights. In terms of heating, it has 18 heating zones, 9 upper and 9 lower, with a total length of 3420mm, which can provide a uniform and stable heating environment to ensure that each solder joint on the circuit board can be fully heated. Moreover, the heat conduction method adopts hot air independent temperature zone circulation and is equipped with a variable frequency speed regulation function, making temperature control more precise.
The cooling system is also worthy of praise. It adopts the upper three-stage water cooling-external chiller cooling method, which can quickly and effectively reduce the temperature of the circuit board and reduce the impact of thermal stress on components and solder joints. This efficient cooling system is of great significance in improving the welding quality and production efficiency of products.
In terms of transmission, chain transmission is adopted, and precise transmission speed and height control are achieved through variable frequency closed-loop control. The transmission speed range is 200 – 2400mm/min, the transmission height is 900±20mm, and the transmission direction can be selected as L-R or R-L to meet the layout and production requirements of different production lines.
Advanced control and protection system
The equipment adopts PC + Siemens PLC control mode, combined with PID + SSR temperature control mode, the temperature control accuracy can reach ±1℃, and the temperature control range is room temperature – 350℃, which can meet the temperature requirements of various welding processes. And the heating time is ≤30min, which greatly shortens the preheating time of the equipment and improves production efficiency.
In addition, the equipment also has a power-off protection function for UPS endurance operation. In the event of a sudden power outage, it can ensure that the equipment continues to operate for some time to avoid welding quality problems and equipment damage caused by power outages. At the same time, MES data can be secondary developed, which is convenient for integration with the factory’s production management system to realize intelligent management of the production process.
Excellent performance under nitrogen protection
The nitrogen device is also a major feature of this equipment. The nitrogen filling method adopts the whole area nitrogen filling and vacuum area sampling. The nitrogen flow rate is 100 – 1000 ppm @35m³/hour, and the nitrogen purity is as high as 99.999%. The use of nitrogen not only further reduces the oxygen content in the welding environment and reduces the occurrence of oxidation reactions, but also improves the quality and reliability of solder joints.
The online nitrogen vacuum reflow oven has become a powerful assistant for SMT engineers in actual production with its excellent welding quality improvement ability, flexible and controllable process parameters, excellent equipment performance, and advanced control and protection system. It represents the development direction of SMT welding technology and is worthy of in-depth understanding and application by every professional SMT engineer. I believe that in the future SMT production, this equipment will bring us more surprises and value.
Shenzhen Chuxin Electronic Equipment Co., Ltd was founded in 1997. The registered trademark is S&M, is a national high-tech enterprise within a dependent industrial park and is committed to becoming the leader of the electronic component surface bonding welding equipment and transmission equipment industry. The product line summarizes the research and development, and manufacturing of electronic components, surface adhesive welding, reflow welding, horizontal and vertical curing furnaces, perforated welding wave soldering, selective wave soldering, SMT transmission equipment, and customized automation equipment.
