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AssigneeHitachi, Ltd.
InventorsToshiyuki Kajiwara, Tadashi Nishino, Tadayuki Watanabe, Yasutsugu Yoshimura, Takao Funamoto
Estimating the term…
A trailing end of a preceding bar is arranged slantingly by an angle .theta. relative to a succeeding bar such that the lower edge of the leading end face of the succeeding bar is vertically shifted from the lower edge of the trailing end face of the preceding bar with the leading end face of the succeeding bar abutting against the trailing end face of the preceding bar. After that, the succeeding bar is vertically depressed by applying a predetermined force. Since the trailing end face is inclined by .theta. relative to the leading end face, the depression causes a relative slide between surfaces of both the end faces and, at the same time, a pressure P is also produced by the wedge effect, the pressure P causing a compression force and a plastic deformation between both the end faces. Oxide scales on the contact surfaces of both the end faces are peeled off due to the plastic deformation and the relative slide, so that the metal surfaces of the material are exposed to join the bars simultaneously in combination with the compression force and the plastic deformation caused by the pressure P. Thus, the bars are joined to each other in a short time for realization of continuous hot rolling.
A hot strip joining method of joining a preceding strip and a succeeding strip to each other in a line of a hot rolling mill system, wherein said method comprises the steps of:
A hot strip joining method of joining a preceding strip and a succeeding strip to each other in a line of a hot rolling mill system, said method comprising pressing an end face of a trailing end of said preceding strip and an end face of a leading end of said succeeding strip against each other so as to cause a plastic deformation and also a relative slide between surfaces of both the end faces, thereby joining both said strips together, wherein said relative slide is caused in the direction of width of said strip.
A hot strip joining method of joining a preceding strip and a succeeding strip to each other in a line of a hot rolling mill system, said method comprising pressing an end face of a trailing end of said preceding strip and an end face of a leading end of said succeeding strip against each other so as to cause a plastic deformation and also a relative slide between surfaces of both the end faces, thereby joining both said strips together, wherein when causing said relative slide while pressing both the end faces of said strips, the joined surfaces of said preceding strip and said succeeding strip are deformed into a zigzag pattern.
A hot strip joining method of joining a preceding strip and a succeeding strip to each other in a line of a hot rolling mill system, said method comprising pressing an end face of a trailing end of said preceding strip and an end face of a leading end of said succeeding strip against each other so as to cause a plastic deformation and also a relative slide between surfaces of both the end faces, thereby joining both said strips together, wherein said preceding strip and said succeeding strip are joined to each other with edges of one strip in the direction of strip width being shifted from edges of the other strip in the direction of the strip width.
A hot strip joining method of joining a preceding strip and a succeeding strip to each other in a line of a hot rolling mill system, said method comprising pressing an end face of a trailing end of said preceding strip and an end face of a leading end of said succeeding strip against each other so as to cause a plastic deformation and also a relative slide between surfaces of both the end faces, thereby joining both said strips together, wherein when causing said relative slide while pressing both the ends of said strips, at least one of said preceding strip and said succeeding strip is oscillated.
A continuous hot rolling method in a hot rolling mill system including at least one roughing mill stand and a training of finishing mill stands, comprising the steps of:
A hot strip joining apparatus for joining a preceding strip and a succeeding strip to each other in a line of a hot rolling mill system, comprising:
A hot strip joining apparatus for joining a preceding strip and a succeeding strip to each other in line of a hot rolling mill system, comprising:
A continuous hot rolling mill system including at least one roughing mill stand and a train of finishing mill stands, comprising:
A continuous hot rolling mill system including at least one roughing mill stand and a train of finishing mill stands, comprising:
Dependencies are inferred from the claim text.