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Wave-soldering nitrogen protection equipment

A technology of nitrogen protection and wave soldering, which is applied in welding equipment, metal processing equipment, auxiliary devices, etc., can solve problems such as limited amount of nitrogen, limited anti-oxidation effect of solder, and poor quality of solder joints, so as to reduce nitrogen consumption and improve The effect of anti-oxidation effect

Inactive Publication Date: 2017-03-22
深圳市凯丰实业发展有限公司
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Problems solved by technology

[0003] The existing nitrogen ventilation equipment in the market adopts the method of blowing the drilled stainless steel tube against the tin surface from different directions such as the top, bottom, left and right of the welding furnace. Since the density of nitrogen is slightly smaller than that of air, it is actually blown The amount of nitrogen on the welding surface is limited, and the anti-oxidation effect on the solder is relatively limited. Generally, the amount of oxidation can be reduced by 30%; and the gas consumption is large, about 40 cubic meters per hour; the gas blown out of the stainless steel hole has a large Pressure, blowing to solder joints that have not cooled will cause poor quality of solder joints

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Embodiment Construction

[0018] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0019] In view of the defects of the prior art: 1. The nitrogen filling method is changed. The top-down nitrogen filling method of the existing equipment does not conform to the principle of gravity. 2. The reduction of gas consumption. The existing equipment adopts the method of stainless steel drilling. Due to the large hole diameter, the nitrogen consumption is large and uneven. 3. The preheating problem of blowing out nitrogen gas. The existing equipment directly blows nitrogen gas below normal temperature into the welding surface, which may easily cause quality problems such as cold welding of solder joints. 4. The problem of automatic control. The nitrogen inlet pipe of the existing equipment is controlled by a manual switch valve, and the equipment operator often forgets to switch it. The invention provides technical solut...

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Abstract

The invention discloses wave-soldering nitrogen protection equipment applied to soldering equipment. The wave-soldering nitrogen protection equipment comprises a soldering wave main body and a microporous pipe for introducing nitrogen. The microporous pipe is connected with a gas flow control panel through a nitrogen input pipeline. The microporous pipe is arranged on the lower portion of a soldering wave. The oxidization prevention effect is improved; and the microporous pipe is provided with honeycomb-like interstitial holes, and the nitrogen consumption is effectively reduced.

Description

technical field [0001] The invention relates to a welding nitrogen protection equipment, in particular to a wave soldering nitrogen protection equipment. Background technique [0002] The wave soldering nitrogen protection system is mainly composed of liquid nitrogen storage tanks, delivery pipes, vaporizers, and wave soldering nitrogen filling equipment. It is an equipment system to reduce oxidized tin slag, reduce surface tension during welding, enhance wetting force, and enhance reliability of solder joints. Utilizing this system can help the factory finally reduce the defect rate after wave soldering, reduce the amount of tin used, and thus improve the reliability of PCBA soldering. [0003] The existing nitrogen ventilation equipment in the market adopts the method of blowing the drilled stainless steel tube against the tin surface from different directions such as the top, bottom, left and right of the welding furnace. Since the density of nitrogen is slightly smaller...

Claims

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Application Information

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IPC IPC(8): B23K3/08H05K3/34
CPCB23K3/08H05K3/34
Inventor 罗国武
Owner 深圳市凯丰实业发展有限公司
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