What are the basic methods and operating steps of electronic manual welding?

Date：2022-09-01 15:38:00Views：1374

Manual welding, as a basic skill that electronics enthusiasts must master, looks simple, but the correct welding steps are often ignored. The wrong operation method will directly affect the welding quality, leaving hidden dangers such as faulty welding and short circuit for products. Therefore, we must master the correct welding method in the process of learning and practice.

1、 The correct method should be five steps:

1. Preparation for welding

Prepare solder wire and soldering iron. At this time, it is particularly emphasized that the head of the soldering iron should be kept clean, that is, it can be coated with solder (commonly known as eating tin).

2. Heating weldment

When contacting the soldering iron with the welding point, it is necessary to first keep the soldering iron heating all parts of the weldment, such as the leads and pads on the printed board to heat them. Secondly, it is necessary to make the flat part (the larger part) of the soldering iron head contact the weldment with large heat capacity, and the side or edge part of the soldering iron head contact the weldment with small heat capacity to keep the weldment evenly heated.

3. Melting solder

When the weldment is heated to a temperature capable of melting the solder, the welding wire is placed on the solder joint, and the solder begins to melt and wet the solder joint.

4. Remove the solder

Remove the solder wire after melting a certain amount of solder.

5. Remove the soldering iron

When the solder is completely wetted, remove the soldering iron. Note that the direction of removing the soldering iron should be approximately 45 °.

2、 Holding method of electric soldering iron

There are three basic methods for holding electric soldering iron:

a) Reverse grip: hold the handle of the electric iron in the palm with five fingers. This method is applicable to high-power electric soldering iron and welded parts with large heat dissipation.

b) Positive grip method: it is applicable to large electric soldering iron, and it is generally used for curved soldering iron head;

c) Pen holding method: use the pen holding method to hold the electric iron. This method is applicable to small-power electric soldering iron and welded parts with small heat dissipation.

3、 The operation steps of manual manufacturing and welding PCB circuit board PCB circuit board are as follows:

1. Preparation for welding in advance: preparation before welding includes cleaning and solving of welding position, installation of electronic devices and preparation of welding materials, flux and special tools. The left hand is the solder wire, and the left hand is the electric chrome iron (the electric network shall be kept clean and the welding joint shall be kept in the welding condition at any time).

2. Heating welding parts: pay attention to the overall heating of all welding parts, which shall be even when heated.

3. Feeding welding rod: after heating the welding part to the required heat, the welding rod and electric iron touch the welding part from the opposite door.

4. Remove the welding rod: when the welding rod is melted enough, remove the welding rod immediately.

5. Remove electric welding: remove the electric iron after the solder wire passes through the welding layer or the welding position of the weldment.

The above is the relevant content of electronic manual welding compiled by Chuangxin testing group. I hope it can help you. Chuangxin testing is a professional testing institution for electronic components. Currently, it mainly provides testing services for integrated circuits such as capacitors, resistors, connectors, MCU, CPLD, FPGA and DSP. Specializing in functional testing of electronic components, incoming appearance testing of electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components, and RoHS component analysis testing. Welcome to call, we will serve you wholeheartedly!