Detailed Description Of Control Board Processing Process

First, the pre-process

1.Taping and preforming

According to the serial numbers of different printed boards, the electronic components that have been taped are inserted in sequence and the electronic components with different requirements for different location numbers are retaped. So that when inserting the machine, you can insert different materials according to different tags. Pre-forming is mainly to pre-shape and shape some components in the opponent's patch cord. In order to improve the work efficiency when inserting hands. 1 taping capacity, 4-5 pre-formed capacity.

2. Brush glue (red dot glue)

Use a brush or dispenser to apply the serial number on the printed board corresponding to the component to be mounted to prevent the components from falling after mounting. Capacity 1 person.

3.SMD, reflow soldering

Paste and reflow soldered printed boards, reflow soldering makes components more reliable on printed boards. The components that need to be mounted are generally chip resistors and chip capacitors. The 12-hour patch production capacity is generally around 3000. Capacity 1 person.

4, machine plug

The semi-finished product after the patch is machine inserted, and the machine inserted is divided into a horizontal insertion and a vertical insertion. Mainly resistors and capacitors are used for machine insertion. The capacity of the machine for 12 hours is generally around 3600 yuan. Capacity 1 person.

Assembly workshop

At this time, a control board has completed almost half of the workload. The next steps such as hand insertion, wave soldering, trimming, repair welding, ICT testing, functional testing, and appearance inspection are all performed on the assembly line.

1.Hand insert

This process is a manual inserting operation of the semi-finished product control board inserted by the placement machine. The components that can not be completed in the patch and machine insertion workshop are manually inserted in the manual insertion line. According to different control boards, the general capacity is 15-25 people.

2. Wave soldering

Solder the control board that has been patched, machine-inserted and hand-inserted by wave soldering. Fix all components. 1 person

3, cut feet

This process is to cut off the pins left on the control board components after wave soldering, leaving a margin of 1.5-2.5MM. Capacity 1 person.

4. Repair welding

This step is to check whether there is any soldering or missing soldering on the component pins, and repair it with solder wire. According to different control boards, this process usually has a capacity of 4-8 people.

5.ICT detection

ICT test the control board with a test needle bed to check the control board for open circuit, short circuit, continuous welding, resistance and capacity of components, etc. This process and subsequent function tests are generally the bottlenecks of capacity. Mainly affected by the efficiency of tooling. The general capacity is 1-2 people.

6.Functional test

The function test is to test the power of the control board, simulate the whole machine function, and test whether the various functions of the control board are started normally, such as whether the fan can not turn, whether it can receive remote control, etc. Generally, the capacity is 1-2 people.

7. Appearance inspection

Perform the final visual inspection of the control board that passed the functional test to check whether there are problems such as false soldering, missing soldering, and inadequate component insertion. The general capacity is 2 people.

8.Brushing

The back of the control board that passed the inspection is brushed with three anti-adhesives, which are mainly used to prevent moisture and insulation. The general capacity is 1 person.

9.Drying

It takes 30 minutes to dry the glued control board through the drying tunnel. Capacity 1 person.

10.Packing

Pack the anti-static bag for the control board that has completed all the above processes, pending shipment. The general capacity is 2-3 people.

The processing cost of the control board is calculated by welding points, and the packaging and transportation costs are converted into calculations and added to the point cost. The two pins of the chip are calculated according to one solder joint.

The control board is one of the core components of various household appliances. Most of the specific program functions are realized by this part. In a sense, the quality of the control board determines the quality and life of the household appliances. Controlling the quality of control boards is the foundation for the survival and development of major control board companies.