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AssigneesTeizo Maeda, Masao Murakawa, Nishimori Kogyo Co., Ltd.
InventorsTeizo Maeda, Masao Murakawa
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A method and apparatus for continuous cold cutting or slitting of a flat material wherein the flat material is subjected to a first step of partial-shearing or penetration in a zigzag state to a controlled depth of penetration, and subsequently to a second step of flattening, thus forcing the penetration formed in the material back to substantially the original thickness of the material, thereby to perform complete severing or slitting the material having no burrs formed during the operation. The first working action is obtained from feeding of the flat material into the controlled spacing of opposing pairs of cutter discs so that there occurs partially shearing or penetration in the flat material under an optimally predetermined interfering action by the opposing pairs of cutter discs into the material when it engages therewith. The second working action is obtained from the insertion of thus partially-sheared or penetrated material into the spacing optimally predetermined between an opposing pair of rolls having a flat cylindrical surface so that there occurs flattening action by the opposing pair of rolls over the both surfaces of the material when engaged therewith. The cutter discs and flattening rolls are controllably driven in synchronism.
The apparatus for cold cutting a strip of flat material which comprises, in combination, a pair of shaft means arranged in a parallel relationship with each other and extending in a transverse relationship with respect to the moving path of said flat material, at least one pair of opposing cutter disc means securely mounted in a coaxial relationship on said shaft means wherein the clearance defined between adjacent side faces of said opposing pair of cutter disc means is 0 to -10% of the thickness of said flat material, said opposing pair of cutter disc means being adapted to provide a shear force perpendicularly to the surfaces of said flat material along a longitudinal line parallel with the longitudinal edge of said flat material so as to provide a desired extent of shear strain in said flat material, thereby partially penetrating said flat material on a spot to be slit, and an opposing pair of rolls operatively coupled to said cutter disc means and disposed downstream of said opposing pair of cutter disc means in the direction of the moving path of said flat material, said rolls being mounted on a pair of parallel shaft means extending in a transverse relationship with respect to the moving path of said flat material, said opposing pair of rolls having cylindrical flat surfaces and selectively adapted to force back said partial penetration formed in said flat material substantially to the thickness of said flat material in a substantially flat state, whereby a continuous slitting operation is performed.
A method of cold cutting a strip of flat material, said method comprising the steps of:
An apparatus for cold cutting a strip of flat material, said apparatus comprising:
Dependencies are inferred from the claim text.