A welding process and equipment for auto-focus module

Abstract

A welding process and equipment for an auto-focus module, relating to the technical field of camera module processing, including a feeding machine, a welding inspection machine, a feeding machine, a guide rail, and a reflow belt mechanism, on which a welding fixture is driven and installed, The feeding machine is equipped with a tray feeding mechanism, a servo swing manipulator, a welding fixture mobile manipulator, a welding work platform, and a welding feeding system are installed on the welding inspection machine, and the unloading machine is equipped with a tray recovery mechanism, a transfer manipulator, and a servo pendulum. The plate manipulator, the turntable with the product enters the feeding machine, and the feeding machine places the product on the welding jig, and then the welding jig enters the welding inspection machine for welding. After the welding is completed, it is inspected. Afterwards, the welding jig is unloaded from the unloading machine and collected manually. The whole process integrates the four stations of loading, welding, inspection and unloading into one station, and realizes automatic welding and detection, improving welding efficiency, yield and soldering quality.

Description

technical field [0001] The invention relates to the technical field of camera module processing, in particular to a welding process and equipment for an automatic focus module. Background technique [0002] The traditional autofocus module motor pin welding method is mostly manual use of an electric soldering iron under high temperature conditions (soldering iron temperature 320±10℃) to melt the tin wire to connect the motor pads and pins together. [0003] The traditional auto focus module motor welding operation method is purely manual operation, including the following specific steps: a. Turn on the electric soldering iron, adjust the temperature to 320 °C, and preheat the electric soldering iron. b. Take the products out of the middle turntable and paste them on the soldering jig, make the motor pins face the working direction, and align the pasting position with the edge of the soldering jig. c. Hold the tin wire in the left hand and the soldering iron in the right han...

AI Technical Summary

Problems solved by technology

[0004] The traditional manual welding of auto-focus module motors has the following disadvantages: ①The welding efficiency is extremely low; the operator first needs to take the product out of the turntable and paste it in the soldering jig, and each soldering jig can only place 8-10 pieces The product is then soldered according to the order from top to bottom and from left to right. After the soldering is completed, the solder joints must be inspected under a 20X microscope to confirm that there are no false soldering, missing soldering, excess tin, less tin, and motor If there are abnormal phenomena such as tin sticking and scalding of the mirror base, after confirming that there is no abnormality in the welding, remove the soldered products in turn and place them in the good solder tray

During this process, the two loading and unloading actions have no practical significance to the soldering action. ②The soldering yield is low, the soldering iron is oxidized, the soldering is difficult, and the holder burns and the substrate burns due to too long soldering time; the end face of the motor caused by insufficient operator proficiency , The substrate, the mirror seat stick to tin, the size of the solder ball is too large to cause poor size, the solder ball is too small to cause virtual soldering, missing soldering, etc. ③The detection rate of defects is low; after the soldering is completed, employees need to separate the front and side soldering tin under a 20X microscope The effect is checked, and some items of solder joint inspection are subjective judgment items, and the judgment standards cannot be completely unified

For example, if the amount of tin in the front inspection pad is less than 1 / 2 of the pad area, it is not allowed. It can be seen that the solder joint is not full, and 1 / 3 of the pin height is not formed or it is not completely connected to the pad, which may affect the hidden danger of the motor operation. Allowed, the length of the burnt lens base must be controlled within 0.5mm. Subjectively, if the clamping control is too strict, it will cause excess quality, and if the clamping control is too loose, there will be a huge quality hidden danger

④ Welding is limited. At present, the product design is diversified, and the pin direction is not limited to the front or side of the product FPC. The motor pins of some products are in the same direction as the FPC. The welding process can easily cause FPC burns and affect the module circuit transmission.

⑤The process is cumbersome; since the size of the current module is getting smaller and smaller, the height of the lens is basically higher than the end face of the motor. Manual placement and welding process will inevitably cause lens scratches. Therefore, in order to avoid lens scratches caused by soldering, the materials arrive at the soldering station Previously, it was necessary to attach a protective film, and the soldering process was carried out with the film, resulting in a waste of process

⑥ Feasibility of manual welding; with the continuous development of the industry, the autofocus module motor is not limited to the common 2pin, and the proportion of 4pin and above 7pin modules is constantly increasing. Some high-end demand modules (OIS, TOF, structured light Direction) The number of motor pins has reached more than 15pin. Basically, the manual soldering process of this type of module is completely unable to meet the requirements.

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