Vertical annealing furnace for bonding wire

Abstract

A vertical annealing furnace for a bonding wire comprises a rack and an annealing assembly arranged on the rack. The annealing assembly comprises a heating device. The vertical annealing furnace is characterized in that the part, close to the wire inlet end of the heating device, of the rack is provided with an unwinding shaft, and the part, close to the wire outlet end of the heating device, of the rack is provided with a winding shaft; the annealing assembly further comprises a liquid cooling device and an air drying device, and the liquid cooling device and the air drying device are arranged on the part, located between the wire outlet end of the heating device and the winding shaft, of the rack; the liquid cooling device comprises a container with the upper end opened, the container isarranged on the rack and used for containing annealing liquid with the liquid face higher than the upper end face of the container; and the air drying device is located behind the liquid cooling device, the position close to the wire outlet end of the heating device is further provided with a first guiding device, the first guiding device is used for guiding the direction of the bonding wire discharged out of the wire outlet end position of the heating device into the horizontal direction and making the bonding wire immersed in the annealing liquid above the upper end face of the container. The vertical annealing furnace for the bonding wire is good in cooling effect and anti-oxidization effect and low in cost.

Description

technical field [0001] The invention relates to the technical field of annealing furnaces, in particular to a vertical annealing furnace for bonding wires. Background technique [0002] Annealing is a metal heat treatment process, the metal is first slowly heated to a certain temperature, kept for a sufficient time, and then cooled at an appropriate speed. The purpose is to reduce hardness, improve machinability, eliminate residual stress, stabilize size, reduce deformation and crack tendency, refine grain, adjust structure and eliminate structure defects. The Chinese utility model patent whose authorization announcement number is CN204080036U discloses a kind of vertical annealing furnace, and its structure is as follows: figure 1 As shown, it includes the main body case 1a, the left tension control box 2a, the right tension control box 3a, the left take-up shaft 4a, the right take-up shaft 5a and the annealing assembly 6a; the left tension control box 2a is installed on t...

AI Technical Summary

Problems solved by technology

[0003] However, the existing vertical annealing furnace for bonding wires still has the following technical problems: due to the use of nitrogen for annealing and cooling, and the cooling rate of nitrogen is relatively slow, the cooling time is required to be longer, and there may be bonding wires when nitrogen is used for cooling. The surface is cooled, but the inside is not completely cooled, resulting in an unsatisfactory anti-oxidation effect. In addition, the cost of nitrogen cooling is also high

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