The bimetallic band saw blade was originally a ribbon shaped tool, and after cutting the appropriate length according to the specifications of the saw machine, the two ends of the saw blade were welded together to form a circular tool. Firstly, the two ends of the saw blade are carefully filed with a file to form a beveled edge or ground with a grinding wheel to form a beveled edge, and the two ends are lapped together so that the thickness of the jointed portion is the same as the thickness of the saw body. The width of the overlapping diagonal blade should be based on the width of the bimetal band saw blade. The wider the saw blade, the wider the width of the overlapping diagonal blade.

Then, the joint of the band saw blade must be at the bottom and back of the teeth. To make the pitch of the overlapping part the same as that of the other teeth, sprinkle borax or boric acid powder on the welding points at both ends of the saw blade, weld and clamp the thin pieces with uniform thickness in the middle, clamp both ends of the saw blade on the saw receiving table, align the welding position, and clamp two red hot soldering irons on both sides of the part to be welded,", Quickly move the screw used to clamp the soldering iron on the saw receiving table, and the clamp clamps the upper and lower soldering irons to dissolve the silver welded flakes.

Finally, when the soldering iron gradually changes from red to black, but there is still considerable residual heat left, loosen the screw and remove the soldering iron. This can make the welding part of the bimetal band saw blade directly contact with air and obtain appropriate quenching. However, the appropriate degree of blackening of the soldering iron must be solved through skilled technical experience in repeated work.