Soldering under pre-stressing, comprises supporting the lifting of a tool from a soldering-material with a directed stream of air through the soldering tool after soldering

摘要

#CMT# #/CMT# Soldering under pre-stressing, comprises supporting the lifting of a tool from a soldering-material with a directed stream of air through the soldering tool after the soldering process. #CMT# : #/CMT# An independent claim is also included for a device for soldering under pre-stressing, where air is directed through at least one channel in a soldering stamp after soldering to support the lifting of the tool from the soldering material. #CMT#USE : #/CMT# The method is useful for soldering, preferably punctual soldering under pre-stressing. #CMT#ADVANTAGE : #/CMT# The method is carried out without using any additional blank holders. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a schematic process flow of soldering under pre-stressing during production of solar modules. 6a, 6b : Solar cells 7 : Metallic connecting strips 8 : Cross-connector 9 : Connector #CMT#INSTRUMENTATION AND TESTING : #/CMT# Preferred Method: The heating of the soldering material is carried out via induction. The air-stream is switched on only for a short pulse or a sequence of pulses after the completion of the soldering process, where the respective pulses are shorter than the actual soldering time. The pressure in a corresponding air channel is detected by a sensor. The air-stream promotes the lifting of the soldering tool from the soldering material, and also cools a soldering joint to shorten the time for solidifying the solder at the soldering point. The method comprises using gas instead of air. The air channels in addition to the discharging function are also used to suck the joining partners by negative pressure and to position at the soldering joint. Preferred Components: A pressure-proof plate or the lower side of the soldering stamp is provided with a structure to direct the targeted air-stream. The control of the air pulse is coupled with the vertical movement of the soldering tool.