论文部分内容阅读
该例是点焊时检测工件的有无。焊接时由于喷溅和粉尘而造成检测环境极为恶劣,所以点焊时工件的检测,仍然用光电开关是不合适的。 用气压检测工件的方法有多种,但本方法是在电极上加工出喷孔,直接用做气压传感器的检测端,当这个喷孔被工件堵住时,便可检测出所产生的背压。该喷孔的气体只由传感器通过节流孔来供应,如喷嘴上没有物体,空气会自由地从喷嘴喷出,压力不升高。但是,如
This is the case of spot welding inspection of the workpiece. Welding spatter and dust caused by the testing environment is extremely poor, so the spot welding workpiece detection, still use the photoelectric switch is not appropriate. There are many ways to check the workpiece by air pressure. However, this method is to process the nozzle hole on the electrode and use it directly as the detection end of the air pressure sensor. When the nozzle hole is blocked by the workpiece, the back pressure generated can be detected. The gas in the nozzle hole is supplied only by the sensor through the orifice. If there is no object on the nozzle, the air is freely discharged from the nozzle without increasing the pressure. However,