A kind of desoldering fixture and desoldering method of smp connector

Abstract

The invention relates to a desoldering clamp for an SMP connector and a desoldering method. The desoldering clamp includes a desoldering head and a heating rod. The desoldering head is formed integrally by a head portion and a tail portion. The head portion has a shape adapted to an inner cavity of an outer conductor of an SMP coaxial micro-strip adapter. A slit groove is machined in the head portion. The end portion of the head portion is provided with a projection. A groove is disposed in the inner cavity of the outer conductor of the SMP coaxial micro-strip adapter. An inner thread is machined on an inner cavity of the tail portion. The heating rod is formed integrally by a first rod portion, a second rod portion and a third rod portion. The first rod portion is adapted to electric soldering iron. An outer thread is machined on the peripheral surface of the second rod portion. The third rod portion has an accommodating cavity for the insertion of an inner conductor of the SMP coaxial micro-strip adapter. According to the invention, a failed SMP coaxial micro-strip connector in a microwave module is quickly heated and desoldered locally by the electric soldering iron, with less influence on other regions, the size and shape of the microwave module exerts no influence, and the desoldering method is simple and highly operable, and has a wide range of application.

Description

technical field [0001] The invention relates to a desoldering fixture and a desoldering method for an SMP connector. Background technique [0002] SMP type coaxial microstrip connector is a small push-in radio frequency connector, which has the characteristics of small size, quick plug-in, and wide operating frequency. It is widely used in various microwave modules and is usually fixed to the microwave by welding. in the cavity of the module. During use, if a certain connector fails due to various reasons, its disassembly is very difficult and may cause other damages, which in turn leads to failure of the entire microwave module. [0003] In the microwave module, the SMP coaxial microstrip connector is an important functional element for RF signal transfer and energy transfer, and is also an important input and output interface of the microwave module. According to different connection interfaces, SMP is divided into two types: female and male. Usually, the SMP coaxial mic...

AI Technical Summary

Problems solved by technology

[0006] The desoldering method of overall heating is relatively simple to operate, but the disadvantage is that when the overall heating temperature rises above the melting temperature of the solder, not only the solder of the failed connector will melt, but also the solder of other normal functioning connectors will melt at the same time, and the soldering will be slightly damaged. The solder with the strips will also be affected. In addition, the expansion of different materials in the microwave module is not the same as the temperature rises, which may cause some damage, such as cracking of the ceramic strips, etc.

[0007] Although the heat gun can heat locally, the heat conduction efficiency is relatively low, and the gun nozzle must be effective within a small distance. After the solder melts, the heat gun needs to be removed to remove the failed SMP coaxial microstrip connector. Come out, in this process, the heat dissipation will cause the temperature to drop, so in normal use, the blowing temperature of the heat gun is adjusted to be much higher than the melting temperature of the solder, which increases the risk of damage to other areas of the microwave module

At the same time, due to the relatively high wind pressure of the heat gun, the melted solder is easily blown into the microwave module, which brings risks such as short circuit

[0008] The desoldering method of mechanical processing can effectively avoid the disadvantages of overall heating, but the operation is more complicated: it is necessary to choose a suitable clamping method to fix it on the machine tool; it is necessary to accurately locate the failed connector; The error caused by the positioning of the clamp; for the connector whose outer diameter is threaded, after machining by the machine tool, the fitter needs to tap again

The whole process is time-consuming and requires experienced operators to complete

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