Improved automatic repair machine for PCBA through hole direct insertion device

Abstract

The invention relates to an improved automatic repair machine for a PCBA through hole direct insertion device. The automatic repair machine is provided with a main rack, and a PCBA fixing fixture is installed in the middle of the main rack; two lower heating assemblies and lower heating assembly driving cylinders are installed below the PCBA fixing fixture; two upper heating assemblies are erected above the PCBA fixing fixture, each connected with a swing frame and driven by a first y-direction servo motor; a flow jet tin furnace assembly is installed below the PCBA fixing fixture, and a manipulator device is installed in the area above the PCBA fixing fixture. According to the automatic repair machine, a preheating device of the repair machine is formed by the two movable lower heating assemblies and the two movable upper heating assemblies to fully and uniformly preheat a PCBA, a preheating area and disassembling, soldering and workpiece taking and inserting areas are located at the same position, therefore, a circuit board does not need to leave from the preheating area during working, heat losses are reduced, energy is saved, the tin immersion time is shortened, and the repair quality is improved; automatic workpiece extraction operation is conducted through the manipulator device, and therefore the workpiece insertion operation precision is improved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of electronic circuit board rework equipment, in particular to an improved automatic rework machine for PCBA through-hole in-line devices. [0003] Background technique: [0004] At present, in the domestic circuit board manufacturing industry, for defects in the production of finished circuit board through-hole devices (PCBAPTH) and the cross-validation required for research and development, it is necessary to remove and solder the soldered through-hole devices. . The traditional method of rework, because there is no preheating and anti-deformation technology, but directly uses a small tin furnace for immersion tin desoldering, the time and accuracy cannot be controlled, and can only be controlled by the operator's experience, resulting in a large number of PCBAs Scrap or serious quality problems. Its main manifestations are: directly place the components to be replaced on the circuit board on the ...

AI Technical Summary

Problems solved by technology

The traditional method of rework, because there is no preheating and anti-deformation technology, but directly uses a small tin furnace for immersion tin desoldering, the time and accuracy cannot be controlled, and can only be controlled by the operator's experience, resulting in a large number of PCBAs Scrap or serious quality problems

Its main manifestations are: directly place the components to be replaced on the circuit board on the tin waves of the small tin furnace (some have no tin waves), so that due to the large temperature difference between the circuit board as a whole and the through-hole components to be replaced, thermal expansion Deformation caused by different systems, once the circuit board is deformed, it is very easy to cause problems such as internal open circuit, through-hole copper dissolution or hole copper breakage

[0005] The inventor has developed an automatic repair machine for PCBA through-hole in-line devices, which can preheat the PCBA to a certain extent and partially solve the above problems. However, there are still the following deficiencies: First, the PCBA preheating area It is separated from the immersion tin area, and connected by rails, the whole machine needs to occupy a relatively large space; secondly, this structural arrangement determines that the rework process is to be preheated in the preheating area first, and then transferred to the immersion tin area , it takes time and there will be heat loss in the middle, and it is necessary to extend the tin immersion time to compensate for the heat loss, so there will still be risks such as internal open circuit, through-hole copper dissolution or hole copper fracture, and the efficiency is also high; Parts, pick-up, and plug-in all need to be done manually. Since the PCBA is at high temperature, it is necessary to wear heat-resistant gloves, which brings inconvenience to the operation, especially for small devices, which may easily cause defects such as inaccurate plug-in.

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