With the in-depth development of a new round of scientific and technological revolution and industrial change, intelligent manufacturing is leading the direction of global manufacturing development and change, in the field of electronics manufacturing, PCBA circuit board SMT and DIP production equipment intelligence is a key link in the transformation and upgrading of electronic manufacturing enterprises, which is conducive to improving the traditional manufacturing industry model and reducing labor costs. Improve production efficiency and yield of electronic products.
The DIP furnace post-inspection and repair process is an important node to improve the production efficiency of the entire production line. Starting from the post-wave welding section, the equipment is followed by the connection station, AOI, selective wave welding, AOI, involving testing, spraying, welding and other processes.
At present, there are several problems in the furnace repair line on the market
1, PCB bad detection of high misjudgment, low straight-through rate
2, the selection of welding using the mechanical origin positioning method, resulting in tooling errors, mechanical errors, so that the tin nozzle can not be accurately positioned to the bad solder joints
3, for different defect categories, need to manually set parameters
Especially in the current trend of miniaturization and precision of electronic components, the problems on the market have restricted the improvement of production efficiency, in the new generation of post-furnace repair program, for improving the detection accuracy rate, reducing the defective rate, improving the level of production line automation and other needs to improve, effectively improve the repair efficiency, the repair yield increased to 99.95%.
AOI detection improves accuracy
AOI inspection equipment equipped with high performance industrial cameras, no need to flip over, seamless docking wave soldering production line, to meet the high-speed DIP process capacity.
Combined with a multi-spectral ultra-high-speed programmable optical system, multiple images are captured per detection field, which helps to accurately identify undesirable features. The AOI test has higher detection and lower false positives than the traditional post-furnace repair line.
AOl detects the bad position and type of the product solder joint, and transmits the coordinates of the bad spot to selective wave soldering to realize information interconnection.
Optimization of repair yield by selective wave soldering
Selective wave soldering for spray, preheating, welding integration design, small footprint, low energy consumption, high production efficiency.
Instead of the traditional mechanical origin positioning method, the solder joint positioning is based on the PCB position, and the bad coordinate information transmitted by AOI is read
It can set individual parameters for each solder joint according to the information in the component library, and automatically repair bad solder joints without the use of manual.
Precision spray flux system with spray test function and flow level monitoring, spray speed up to 20mm/s, positioning accuracy of ±0.15mm, accurate target through hole positioning. The spraying of flux helps to remove oxides from metal surfaces and prevent reoxidation, while increasing welding firmness.
The dynamic preheating at the bottom is combined with the hot air preheating at the top, and the preheating division control system gives full play to the maximum energy efficiency ratio, effectively preventing the warping and deformation of the circuit board caused by uneven heating at different positions.
▲ Blue is the welding preheating temperature curve, the heating speed is fast, the temperature is high
The smooth crest can make the soldering effect better, Jingtuo choose welding using electromagnetic drive to control the crest system, to achieve a stable crest state, with 3-axis servo control system, accurate positioning of the need to repair the solder joint area.
AOI secondary inspection maximizes control quality
After selective wave soldering, the repaired PCB will be tested twice, and the qualified PCB will be sent to the blanking machine, and the unqualified PCB will be sent to the selective welding again by the defective product distributor.
The AOI responsible for the secondary inspection will also pass the detected bad spot information to the selective welding, and the defective PCB will be repaired twice by the selective welding
The secondary repair provides guarantee for the yield of the product, improves the process of the front section, and achieves the goal of zero defects in the production line.
In the context of intelligent manufacturing enabling manufacturing industry to improve the quality and upgrade, Jinto based on the independent research and development of technical achievements, composed of post-furnace inspection and repair automation solutions, safe and efficient, fully automatic testing, to comprehensively improve the production efficiency of the electronic manufacturing industry; All along, Jintuo has been committed to providing high-quality intelligent solutions for the comprehensive upgrading of PCBA electronic manufacturing industry chain, and achieving quality improvement, cost reduction and efficiency improvement in new energy vehicles, medical devices, communications electronics, aerospace and other industries. Strengthen the basic support capacity of advanced manufacturing, and help the manufacturing industry to transform and upgrade to intelligent manufacturing.
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