Electron beam welding method for heat exchange pipes and pipe plate in tubular heat exchanger

By means of an electron beam welding method for heat exchange pipes and a pipe plate in a tubular heat exchanger, beam spots of an electron beam can do circular motion around a point, the heat exchange pipes and the heat plate do horizontal motion together with the point as the circle enter, and therefore the beam spots can move on weld joints between the to-be-welded heat exchange pipes and the pipe plate all the time, and welding between the heat exchange pipes and the pipe plate is achieved. Due to the adoption of the electron beam welding method, the shielding problem caused when the heat exchange pipes are welded on the pipe plate in batches can be avoided, the heat exchange pipes and the pipe plate can be reliably welded in batches, operation is easy and convenient, the production efficiency can be improved, and the production cost can be reduced. 种管式换热器中换热管与管板的电子束焊接方法，使电子束的束斑绕着个点做圆周运动，换热管和管板起以该点为圆心做平动从而使束斑始终都能在待焊接换热管与管板之间的焊缝上移动，以实现对换热管与管板之间的焊接。采用该发明不仅能够避免在管板上焊接批量换热管时的遮挡问题，实现批量换热管与管板的可靠焊接，而且操作容易方便，可提高生产