Automatic aluminum wire pressure welding machine wire feeding device

Abstract

The invention relates to a fully-automatic aluminum wire press welder wire feeding device which comprises a fixed cover, a wire reel, a wire blocking assembly, an unwinding assembly, an unwinding detection assembly, an unwinding control assembly and a wire reel installation assembly. The wire reel installation assembly comprises a wire reel rotary shaft, a pressing elastic piece arranged in the axial direction of the wire reel rotary shaft and a rotary shaft installation assembly. The wire reel is installed on the wire reel rotary shaft, and the pressing elastic piece is located in an installation hole of the wire reel. The wire reel rotary shaft is arranged on a rear cover through the rotary shaft installation assembly and can freely rotate relative to the rear cover. The wire reel rotary shaft is arranged on the rear cover through the rotary shaft installation assembly, the pressing elastic piece is arranged in the axial direction of the wire reel rotary shaft, the inner side of the installation hole of the wire reel causes elastic deformation of the elastic piece, and friction resistance is generated between the inner side of the installation hole and the elastic piece, so that the wire reel rotates smoothly, unwinding is flexible, and the aims of preventing the wire reel from axially bouncing and rotating randomly can be achieved.

Description

technical field [0001] The invention relates to a wire supply device of a fully automatic ultrasonic aluminum wire pressure welding machine in packaging equipment in the microelectronics industry. Background technique [0002] In the automatic ultrasonic aluminum wire pressure welding machine, the function of the wire feeding device is to deliver the required welding wire to the welding head stably, accurately and uninterruptedly, so as to complete the welding process. Therefore, in order to ensure the welding quality, a good wire feeding device is indispensable. The existing fully automatic ultrasonic aluminum wire pressure welding machine wire feeding device includes a fixed cover, a wire reel, a wire retaining assembly, a wire feeding assembly, a wire feeding detection assembly and a wire feeding control assembly. Among them, the fixed cover is mainly composed of the front cover and the rear cover hinged by hinges, and other components of the wire feeding device are plac...

AI Technical Summary

Problems solved by technology

The main problems of this kind of wire supply device are: (1) The wire reel is directly installed on the wire reel rotating shaft, and the wire reel rotating shaft is connected with the back cover through the bearing; Fleeing and spinning due to inertia

(2) The wire feeding assembly is composed of a driving wheel and a driven wheel. The wire is clamped between the two wheels. The driving wheel is driven by a motor to rotate, and the wire is continuously drawn out from the reel; due to the clamping between the driving wheel and the driven wheel The force cannot be adjusted, the wire feeding effect is not ideal, and the wire feeding rate is unstable

(3) Due to problems such as the easy axial movement of the wire reel and the disordered wire due to inertial rotation, the clamping force between the driving wheel and the driven wheel cannot be adjusted, the wire feeding position is not accurate

(4) The wire feeding control assembly consists of a pair of wire rollers and a wire tube; the wire rollers and the wire tube are installed on the equipment, and the wire passes through the gap between the pair of wire rollers and enters the wire tube to complete the wire before welding. Feed, wire threading is inconvenient, and it is easy to damage the wire, there is no wire breakage protection function

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