What are the components of wave soldering and reflow soldering? What spare parts are needed?

Spare parts for wave soldering include: electrical box, nearly half connection, spray box, all-hot air preheating box, wave crest device, claw washing device, exhaust device (optional U floating fan), oil-water separator, clamping plate device, explosion-proof lamp, tin spraying device, tin furnace lifting device, tin furnace bracket, nameplate, automatic tin furnace inlet and outlet device, tin furnace fixed anti-skid device, etc. Mainly consists of the following parts:

1 spray system

1. nozzle: the spray range is 20-65 mm, the sector is adjustable, the nozzle height is 50-20-65 mm, and the maximum flow rate is 60 ml/min.

2. Gas path system: mainly composed of filters, control valves, pipe joints, etc., with digital display.

3. Nozzle moving system: motor-driven, Japanese Mitsubishi PLC intelligent control, limit proximity switch and entrance optical eye combined control, automatically detecting PCB entrance induction spraying according to PCB speed and width.

4. Flux filtration and recovery system: stainless steel wire mesh filtration, using the characteristics of fluid to filter and recover excess flux to the maximum extent.

2 preheating system

1, preheating zone: the total preheating length of three independent microcircuits 1800mm, and the temperature is independently controlled (four preheating stages are optional, and the hot air is stronger).

2.PLC: temperature control

3. Motor: Full hot air heating.

3 tin furnace system

1, the automatic guide groove is matched with the buffer device before and after the nozzle, which greatly reduces the oxidation amount of tin slag, and it is convenient and safe to manually adjust the peak distance externally.

2. The furnace liner is made of lead-free special materials, and the nozzle is equipped with an adjusting device, which greatly reduces the oxidation and cost for customers.

3. The whole tin furnace is an automatic access device, which reduces the maintenance time and the workload of technicians. Compared with peers, it is easier to operate, saving labor and time.

4. The tin furnace is equipped with a liquid level marking line, which can inform the operator of the minimum tin level standard and avoid increasing tin slag oxidation due to low tin level.

4 transportation system

1. The conveying system adopts segmented floating structure, and the new supporting profile has good strength, which can effectively prevent the deformation of the guide rail and never cause the PCB to fall off.

2, professional strengthening lead-free titanium alloy claw, no tin plating, long service life. 5MM brass flat strip is used for layering, which is wear-resistant and quiet, and reduces the wear with titanium claws. Optional load-bearing guide rail+load-bearing duckbill claw, stable and durable, never deformed.

3. The titanium claw cleaning device is automatic, equipped with automatic liquid pump and liquid storage tank, and equipped with industrial flexible brush, which does not hurt the titanium claw, and is convenient to clean and simple to operate.

4. The central support system and stainless steel arc support bars can be selected to quickly adjust the support position and height to prevent the circuit board from being overweight or deformed due to splicing, and to prevent the thin plate from being deformed due to excessive temperature.

5 control system

1, Dell monitor+industrial control host+Siemens module (Dell monitor+industrial control computer+Mitsubishi PLC).

2. Protection system: stop heating, overload protection and splint protection in case of preheating or tin furnace failure.

3. Abnormal alarm device: alarm when the temperature is too high or too low, the flow rate is too low, and each system fails.

Reflow welding equipment is equivalent to a large oven, which mainly includes airflow system, heating system, transmission system, cooling system, flux recovery system, waste gas treatment and recovery device, top cover air pressure lifting device, exhaust device and so on. It contains the following parts:

? 1. airflow system: high air convection efficiency, including speed, flow, fluidity and permeability. ?

? 2. Heating system: It consists of hot air motor, heating pipe, thermocouple, solid state relay and temperature control device. ?

? 3. Transmission system: including guide rail, mesh belt (central support), chain, conveying motor, rail width adjusting structure, conveying speed regulating mechanism, etc. ?

4. cooling system: it can quickly cool the heated PCB, and there are usually two ways: air cooling and water cooling.

5. Nitrogen protection system: PCB is protected by nitrogen in the preheating zone, welding zone and cooling zone, which can prevent the oxidation of solder joints and copper foil at high temperature, enhance the wetting ability of molten solder, reduce internal cavities and improve the quality of solder joints.

6. Flux recovery device: Generally, there is an evaporator in the flux waste gas recovery system. The waste gas (flux volatiles) is heated to above 450℃ by the evaporator, so that the flux volatiles evaporate, and then the water is cooled by the water cooler and circulated through the evaporator. The flux is pumped out by the upper blower, and the liquid formed by the evaporator cooling flows into the recovery tank. ?

? 7. Waste gas treatment and recovery device: it has three main purposes: first, environmental protection requirements, so that flux volatiles are not directly discharged into the air; Secondly, the solidification and precipitation of waste gas in welding will affect the flow of hot air and reduce the convection efficiency, so it needs to be recycled; Thirdly, if nitrogen welding is selected, in order to save nitrogen and recover nitrogen, a flux waste gas recovery system must be configured. ?

? 8. Top cover air pressure lifting device: convenient to clean the welding room. When the reflow oven needs cleaning and maintenance, or the plate falls off during production, it is necessary to open the top cover of the reflow oven. ?

9. Exhaust device: Forced exhaust can ensure good flux discharge, and special waste gas filtration can ensure the cleanliness of working environment air and reduce the pollution of waste gas to exhaust pipeline.

? 10. Shape and structure: including the shape, heating section and heating length of the equipment.