Laser heating tin wire feeding drag welding process

Abstract

The invention discloses a laser heating tin wire feeding drag welding process. Laser tin wire welding equipment is adopted. The laser heating tin wire feeding drag welding process comprises the following specific steps of 1, adjusting the size of a laser focus on the equipment to be matched with the size of a welding spot of a pin of a product; 2, selecting the diameter of a tin wire to match thesize of the welding spot of the pin of the product; 3, adjusting the included angle between the arrangement directions of the tin wire and the welding spot of the pin of the product; 4, setting laserpower curve parameters on the equipment; 5, setting the wire feeding speed of the equipment for feeding the tin wire to the laser focus; 6, setting the moving speed of the product or the laser focus on the equipment; 7, setting a movement route of the product, and enabling a welding spot of an unwelded pin to be sequentially overlapped with the laser focus; and 8, when welding is started, sequentially conveying the welding spot of the unwelded pin to the position below the laser focus, and meanwhile conveying the tin wire to the position below the laser focus till all the welding spots of thepins are welded. Abrasion of a soldering bit is avoided, automatic welding is achieved, and the quality stability is improved.

Description

technical field [0001] The invention relates to a laser-heated tin-feeding wire drag welding process, which belongs to the technical field of tin drag welding. Background technique [0002] At present, there are often some electronic components and IC chips on the circuit board, and their pins are the same size as the pads on the bottom board. When soldering, we use a soldering iron as a heat source and apply flux to the pins to be soldered in advance. (if necessary), and then add tin wire while dragging for soldering, usually moving in the same direction, this method is usually called electric soldering iron drag welding. During the soldering process of the electric soldering iron, the tip of the soldering iron must always be in contact with the component pins. Due to friction and corrosion of the flux, the tip of the soldering iron will wear out quickly, resulting in poor soldering. The tip of the soldering iron must be replaced almost every day. , resulting in greatly in...

AI Technical Summary

Problems solved by technology

During the soldering process of the electric soldering iron, the tip of the soldering iron must always be in contact with the component pins. Due to friction and corrosion of the flux, the tip of the soldering iron will wear out quickly, resulting in poor soldering. The tip of the soldering iron must be replaced almost every day. , which greatly increases the difficulty of automated welding

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