The Method about Wave Solder’s Maintenance can be 5 parts:

1. Mechanical part:

If the machine is running too long and unmaintained, the screw will loosen when the check is performed, the gear cone is not tight, the chain speed is slow, and the drive shaft may rust and the track is deformed (such as the bell mouth, The trapezoidal shape will cause the board to fall off, the board phenomenon, the poor quality of the furnace, and the horizontal deformation of the track. It not only affects the performance of the machine itself but also wastes the production time. Because the wave soldering guide rail works for a long time under the high temperature condition of 200 degrees or more, the ordinary grease has insufficient temperature resistance, not only can not achieve the purpose of lubrication, and it is easy to dry and cause the transmission to be blocked. It is recommended to use a temperature resistance of 300 degrees. In addition, if you find that the board is missing, you must find the manufacturer to negotiate whether the rail adjustment device is defective.

2. Heat pipe part:

If the heating pipe is not maintained and replaced for a long time, the heating temperature of the heating pipe will be uneven, the heating pipe will be aged and broken, and the SMT reflow oven will affect the soldering effect of the chip components. If there is cold welding, tin beads, short defects, etc., DIP wave soldering will affect the effect of flux on PCB’A (can not achieve the effect of welding). The solder melting time of the tin bath is prolonged, and the tin is exploded due to uneven temperature (because the tin bursts into the chain during melting, and the bearing is stuck), the temperature control indicates inaccuracy (may cause misjudgment) and so on. This not only guarantees the quality but also wastes production time, and increases the mechanical cost, labor cost and material cost. There are three kinds of general wave soldering preheater heating methods: infrared type, spotlight type, hot air type, different heating methods have advantages and disadvantages, the most important is to locate the heating method according to your product, of course, good peak from the maintenance aspect Welding preheater is generally better for drawer type maintenance.

3. Tin furnace part:

Tin furnace maintenance is the key to wave soldering maintenance. The old wave soldering furnace is heated by heating tube type. Generally, everyone should pay attention to the tin slag cleaning inside the tin furnace during maintenance, and the high temperature bearing refueling, etc. The tin furnace heating element is the key to check. Generally speaking, we have to check the heating element of the tin furnace for two months. The wiring of the heating element is bad, and the heating tube is deformed. It is only discovered after the fault that the tin furnace is generally Breakdown etc., small hidden troubles cause big problems, I believe that everyone is not willing to see.

4. Electrical part:

If the machine is too long time not to be maintained during working, and some parts are not replaced, electrical parts (such as AC contactor, relay ammeter, voltmeter, etc.) and wire ‘s insulation resistance will increase. The conductive performance is not strong, the contact is poor, the lone light will be pulled when the power is applied, and the short circuit will increase the current in the circuit, which may burn out electrical components and instruments. It is not necessary to seriously damage the electrical equipment, delay the production and the consequences of harm to the human body are difficult to predict. Another wave soldering work is in a relatively closed environment. Generally, if your electrical equipment fails frequently, you must pay attention to whether there is any problem with the air exhaust system of the electric control box.

5. Spray part:

If long-term production does not maintain the spray system, the photoelectric sensor will be out of order, the PLC program control is inaccurate, the identification information of the coder synchronized with the track motor spray motor is inaccurate, and the speed of the spray motor is slowed down. This failure will affect the flux spray unevenness (uneven amount, may be delayed or delayed spray), nozzle clogging, insufficient pressure, reduced flow, and increased flux moisture. It does not only affect the quality of the furnace and also increases the after-hours maintenance personnel.