Method and equipment for building nickel protective screen through double-face laser ablation of electric coupler terminal

Abstract

The invention discloses a method and equipment for building a nickel protective screen through double-face laser ablation of an electric coupler terminal. The equipment comprises a feeding mechanism, an overturning mechanism, a positioning device, laser ablation equipment, a terminal material belt, a material drawing mechanism, an image processing element and a control system. Through continuous laser ablation of specific positions of the front face and the back face of the electric coupler terminal, surface gold plating layers on the front face and the back face of the terminal are removed through ablation to expose out nickel layers, and nickel screens are formed so as to prevent the condition that poor welding is caused by climbing of solder paste along the bending position of the terminal in the surface assembling process. Batch processing is achieved through fixed-length control over material belt movement; the nickel screens are built on the two faces by controlling a material belt to overturn, and therefore the restraining effect on the solder paste climbing phenomenon is greatly strengthened; the laser ablation equipment is controlled to adjust the laser scanning width so that the width of the nickel screens can be controlled; the laser power and the laser frequency are controlled so that the depth of the nickel screens can be controlled, and the optimum technology parameter can be obtained on the premise that a copper base material structure is not damaged and the mechanical performance and the electrical performance of the copper base material structure are kept.

Description

technical field [0001] The invention relates to a manufacturing method and equipment of an electrical connector, in particular to a method for using a laser to ablate the surface of a terminal on both sides to establish a nickel barrier to prevent tin climbing. And corresponding automatic production equipment. Background technique [0002] At present, terminals known in the electrical connector industry are made by bending metal. One end is welded to a circuit board by surface mounting technology, and the other end uses the elasticity of the contact terminal itself to form an elastic contact arm for contacting with other electronic components. However, the surface mount technology uses solder to solder the terminal to the circuit board, and the solder paste usually tends to climb along the bent part, resulting in poor soldering. In order to improve this tin-climbing phenomenon, the commonly used methods are: change the terminal structure to prevent tin-climbing; design a s...

AI Technical Summary

Problems solved by technology

[0003] At present, laser ablation is usually used to form a nickel barrier to prevent tin climbing. However, the current method of preventing tin climbing by establishing a nickel barrier often has limited suppression ability. To improve the suppression effect, the nickel barrier area must be expanded, which will inevitably affect the performance of metal terminals.

Moreover, the current method of using laser ablation to suppress tin climbing cannot be widely used in actual production.

Without a set of precisely coordinated equipment, the establishment of the nickel barrier cannot be completed quickly, accurately and with high quality

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