METHOD FOR MANUFACTURE OF CHAIN BLADE OF CHAIN SAW Russian patent published in 2003 - IPC

FIELD: forest and wood- working industries. SUBSTANCE: the method of manufacture of the chain blade consists in cutting out of three plates, welding of the three plates into a stack with a subsequent hardening and tempering of the welded stack of plates in a water-cooled die. The outer and inner plates are produced from the same material, for example, 7XHMA. Production of all the three plates from the same material will provide similar mechanical properties of the chain blade at their joining and carry out the subsequent thermal treatment of the welded stack of plates. Operation of thermal treatment of the stack of plates is carried out after welding, providing uniformity of the mechanical properties of all the three plates and weld spots. In case of high bending forces the chain blade bends uniformly. Local bendings of the plates, buckling and failure of the saw blade are excluded. Besides, in case of a plastic deformation of such a chain blade its correction (straightening) is possible. EFFECT: enhanced durability. 2 cl, 6 dwg