Solder ball pump head for laser soldering

Abstract

The invention provides a solder ball pump head for laser soldering. The solder ball pump comprises an outer sleeve, a solder ball barrel installed on the outer sleeve, a rotor arranged in the outer sleeve and a motor driving the rotor to rotate. The outer wall of the cylindrical surface of the rotor is concaved inwards to form at least one ring of solder ball containing tank distributed circumferentially. The solder ball barrel is installed above the longitudinal plane where the solder ball containing tanks are located and communicated with the solder ball containing tanks. The lower portion of the outer sleeve is provided with ball falling channels communicated with a nozzle through a chute. When rotated to the lower portion, the solder ball containing tanks on the rotor are communicated with the ball falling channels; the solder ball containing tank at the upper end of the rotor is used for receiving a solder ball falling from the solder ball barrel, and the solder ball is closed in the solder ball containing tank when the rotor rotates, slides along the inner wall of the outer sleeve, and enters the corresponding ball falling channel of the outer sleeve till the solder ball containing tank moves to the lower portion of the rotor. According to the solder ball pump head, the manufacturing cost is low, machining precision can be easily guaranteed, and the fault that the ball gets stuck can be effectively reduced.

Description

technical field [0001] The invention relates to the field of laser automation, in particular to a tin ball pump head used for laser soldering. Background technique [0002] Common laser welding is to irradiate the object to be welded with a laser to make it undergo a physical process from melting to recrystallization. The term is called "physical phase transition", and its recrystallization process also includes "alloy phase transition". Even the occurrence of "chemical changes", etc., the finally obtained welded body, we call this welding form "laser fusion welding", and the welding mechanism is as follows: [0003] Physical phase transition: solid phase → liquid phase → solid phase [0004] Alloy phase transformation: For the welding of two different substances, A and B, when the phase change occurs, it will also be accompanied by chemical phase transformation. For example, the alloying elements in the A body will occur in the liquid phase. The combination of metal bonds...

AI Technical Summary

Problems solved by technology

[0015] In addition, the friction surface between the turntable 1 and the upper end cover 13 and the lower end cover 2 is relatively large, and the frictional resistance will be too large due to the comprehensive factors of manufacturing and installation. Therefore, it will be difficult to realize the function of judging the stuck ball by using the change of the motor load current

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