Wave tin-dipping soldering device and implementation method thereof

Abstract

The invention relates to a wave tin-dipping soldering device which comprises a case, an air draft hood, a static pressure sensor and an air inlet hole, wherein the funneled air draft hood is installed in the case and form an air draft port; the electronic type remote wind speed static pressure sensor is installed above the air draft port; and the air inlet hole is formed below a door plate of thecase. An implementation method of the wave wetting soldering device comprises the following steps of: (1) measuring the wind speed greater than 0.1 m / s by using an anemometer after fully opening an air draft switch for ventilation; (2) recording a negative static pressure value measured by the static pressure sensor on the air draft port at the moment; and (3) setting a negative static pressure warning value for minimum wind speed in a computer device according to the measured negative static pressure value. The wave tin-dipping soldering device and the implementation method thereof can be used for immediately giving an alarm after the set and approved value standard is exceeded, so that the health and safety of all personnel on a production line can be both guaranteed, and furthermore, the tin consumption quantity for solder spots of various types of printed circuit board assembly products can be effectively reduced.

Description

technical field [0001] A wave crest dip tin soldering equipment and its implementation method can make the real-time, in-line (Real-time, In-line) operation of a synthetic chemical powder (AOP-22S) capable of purifying molten tin can be easily operated and quickly completed, In addition, by installing a static pressure sensor at the air outlet of the tin furnace station and the flux spraying station, and a method of improving the draft to disturb the air flow, the smoke generated by the flux in the tin furnace station and the flux spraying can be minimized. The water mist generated by the flux at the station can be immediately and completely sucked into the air outlet and discharged into the exhaust gas treatment tower, so that the production line can maintain a stable and good air quality, thereby avoiding excessive accumulation in the pre-heater heating tunnel Flux mist and scale can cause fires. At the same time, it can also avoid excessive flux smoke and scale on the see-t...

AI Technical Summary

Problems solved by technology

[0003] However, the existing wave crest soldering equipment and its welding technology application have been developed into two forms with nitrogen and nitrogen-free, and the technical concepts of these two forms are aimed at reducing tin slag (tin oxide, insoluble tin) However, there is still a considerable distance from the ideal goal of Wuxi Slag. The current practice of improving air quality is to adopt the confinement method adopted by Gun, the father of Dayu in more than 2,000 BC. Therefore, no more significant effect has been produced so far

[0004] see figure 1 , shown in the figure is a schematic diagram of the operation of the intake and exhaust of an existing wave crest tin dipping machine. As shown in the figure, the wave crest tin dipping machine 10, when its air outlet 101 is in normal operation, the casing 102 is completely closed, only There is an inlet and outlet hole 103 for the product clamping chain mechanism, and another inlet and outlet hole 104, whose position is approximately equal to the height of water mist and smog. b The rising direction is at an angle of about 90 degrees, so it will cause water mist and smoke b to overflow in the casing with turbulent flow (arrow c as shown in the figure), resulting in water mist and smoke b everywhere Attached is a see-through glass for the parts and products; in addition, in order to save the power consumption of the ventilation, the factory affairs department often adjusts the ventilation speed to be lower and lower, making the ventilation outlet 101 useless, so that flux mist, And the smoke overflows to the outside of the casing. Moreover, the flux mist and smoke adhering to the see-through glass of the machine must be cleaned weekly with harmful solvents such as IPA, so that the air quality of the existing wave peak soldering machine production line Poor, personnel often have the reaction of respiratory organ, cardiovascular and blood discomfort, which leads to problems such as high turnover rate. This is one of the reasons why advanced industrial countries move production lines that endanger health to undeveloped countries in order to protect the health of their people.

[0005] see figure 2 , the figure shows the arrangement of the inside of the wave tin furnace of an existing wave tin dipping machine and the adjacent mechanisms and accessories. Based on the actual needs of improving tin slag and soldering quality, some manufacturers have developed related mechanisms that can be matched or accessories, however, these mechanisms or accessories are messily arranged inside and adjacent to the wave peak tin furnace, so that the existing wave peak tin furnace can remove the tin slag floating on the surface of the molten tin pot, and can purify the synthetic chemistry of the molten tin pot The working space for powder addition is blocked and interfered, which makes the work difficult and time-consuming. For example, a typical case is that the N2 wave peak tin dipping furnace is completely sealed, or as shown in the figure, the existing wave peak tin dipping machine 10. The turbulent wave nozzle 105 of the tin furnace 107 in the interior swings left and right with the reciprocating mechanism 1051, or various mechanisms are installed around the turbulent wave nozzle 105 and the advective wave nozzle 106 mechanism, such as backflow tin conduit 1061, downward tin Flow conduit 1062, etc., or around the tin liquid pump, install various barrier toner mechanisms, and the unique shape of the product clamping chain mechanism, resulting in a protruding part between the fingertips of the chain mechanism and the bottom wave nozzle opening mechanism , making it difficult and time-consuming to add and remove the synthetic chemical powder that can purify the molten tin in this area, and sometimes it is even impossible to implement. There is no other way for the above obstacles except to dismantle and replace a more suitable mechanism, but such Temporary repair and replacement measures, as well as the shortcomings of the original design, still cause endless problems. For example, the wave peak tin dipping furnace is a high temperature and dangerous working environment. The existing wave peak tin dipping furnace must remove the tin slag every 1.5 to 2 hours, and every The working time for removing tin slag on the molten tin surface will be increased due to the interference of the obstacle mechanism;

[0006] In the business environment of low price and fierce competition, the existing manufacturers of wave crest tin dipping machines all use inferior or worse grade materials, which makes the chemical resistance of the so-called titanium alloy far inferior to the material characteristics of SUS304, plus Attaching the heating electric heater to the outer wall of the tin furnace not only wastes electricity but also further reduces the life of the material and the chemical resistance

[0007] Furthermore, there is another major problem in the existing wave crest tin dipping machine, which is the asynchronous movement of the clamping chain for its products, because the existing wave crest tin dipping machine adopts a synchronous adjustment mechanism for chain tightness, Therefore, when the wear of the two chains is not equal, one of them is still too loose when one of them is tightened synchronously. Trembling phenomenon occurs in the center, resulting in product damage or a high rate of heavy-duty defects. There is also a unique shape of the product clamping chain mechanism, which causes a protruding part between the fingertips and the bottom wave nozzle opening mechanism, which makes it possible to purify the synthesis of molten tin. The addition and removal of chemical powder in this area is difficult and time-consuming, and sometimes even impossible to perform. Therefore, PCBs often fall off in the machine due to poor clamping, resulting in shutdown and overhaul. The clamping chain mentioned above ,Please refer to Figure 5 , the picture shows the clamping chain mechanism diagram of the existing wave crest tin dipping machine, please refer to

[0008] In addition, the poor ventilation of the existing wave crest tin dipping machine will also cause the accumulation of flux mist in the front section of the preheating zone. If the accumulation is too serious, it may cause a fire, which is harmful to the life safety of the production line personnel and the fire. Significant impacts such as loss of production volume during rebuilding, one of many significant disadvantages that are difficult to manage

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