Thermocompression welding method

Abstract

The invention provides a thermal compression welding method. A thermal compression welding machine is utilized to weld at least two wire rods in different wire diameters at the same time. The thermal compression welding method includes the steps that a pressing head of the thermal compression welding machine is placed at the starting position, and the temperature of the pressing head is controlled to gradually rise to the preset temperature T1 from the normal temperature; the steps of downwards pressing the pressing head and adjusting and controlling the temperature are repeatedly executed till the pressing head makes contact with the wire rod in the minimum wire diameter, and the welding time of the pressing head on the wire rods in all wire diameters is kept tn; the pressing head continues to be pressed downwards and the temperature of the pressing head rises to the preset temperature Tn, core wires of all the wire rods and tin points of bonding pads at the corresponding positions are made to be fused, then the temperature of the pressing head is controlled to be lowered, and welding points are formed on the end portions of the wire rods; and when the temperature of the pressing head is lowered to the preset separation temperature, the pressing head and the welding points are separated, and welding ends. By means of the thermal compression welding method, soft wire rods in various wire diameters can be sequentially fused till welding is completed, the welding speed is high, and the welding quality is high.

Description

technical field [0001] The present invention relates to the technical field of wire welding, and more specifically, relates to a hot-press welding method. Background technique [0002] With the development of the IT industry, in order to enhance the tensile strength of many wire harness products, fiber materials are added inside the core wire, and copper (silk) cables are wrapped around the outside. , service life, etc.) have been greatly improved. [0003] The welding of this kind of wire is also called flexible wire welding. Due to the increase of fiber material inside, it increases a lot of difficulty in welding. The temperature transfer during welding can only be achieved by the outer copper wire, and the temperature transfer cannot be directly up and down. , so the welding of the core wire and the pad is more difficult. At the same time, because the wire is soft and the copper wire wound on the outside and inside is easy to scatter during processing, it is easy to cau...

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the purpose of the present invention is to provide a thermocompression welding process to solve the current welding of wires easily lead to fiber exposure, low welding efficiency, poor quality and other problems

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