Rotary notcher for a joined metallic strip
First Claim
1. An apparatus for shearing and removing a predetermined portion of material along at its one longitudinal edge upon its path of travel, comprising:
- drum means comprising at least two spaced-apart cooperative and rotatable drums, each having an axis of rotation and each located opposite said one longitudinal edge of said material,means for mounting said drums transversely relative to said material in a manner their axis is in alignment relative to each other in a vertical plane and for retaining said drums in a shearing and non-shearing relationship with said material,said drums having cooperative arcuate surface areas and cooperative flat surface areas,arcuate knife means mounted around said arcuate surface area of said drum forming a continuous predetermined radius and extending across said arcuate surface which begins and ends at opposite locations relative to said flat surface area thereof to give a predetermined edge cut having a slope between the beginning and end of the edge cut that will be a continuous radius and of a desired length and depth, andmeans for synchronously rotating said drum means in relation to the speed of said material, including means for controlling the rotation of said drum means constructed in a manner so that in said inoperative mode said flat surface areas of said two drums oppose and are fixedly held adjacent each other so as not to be contacted by said travelling material, and in an operative mode said two drums commence to rotate in opposite directions but in the same direction of the travel of the material to bring said arcuate knife means on said each drum together in a cooperative contacting relationship with said material to effect said shearing and removing of said predetermined portion in said material.
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Accused Products
Abstract
A rotary notcher is used in a continuous strip processing line for metallic strip to cut out side or edge portions of the joined strips in the welded area. When an arc welder is used, welding may be done only in the center area of the seam remote from where the notching occurs. The rotary notcher is activated in a time relationship with the welding process to notch along the joined seam. The notcher comprises two opposed housings along longitudinal edges of the strip for cantileverly supporting a cooperative pair of rotatable knife drums each having cooperative arcuate surfaces upon which an arcuate knife is mounted, and cooperative flat sections for allowing the strip to travel therebetween without hitting against the drums. The knife has a continuous gradual slope with a desired depth formed between the two extremes of the edge of the knife to effect a smooth continuous cut.
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Citations
11 Claims
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1. An apparatus for shearing and removing a predetermined portion of material along at its one longitudinal edge upon its path of travel, comprising:
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drum means comprising at least two spaced-apart cooperative and rotatable drums, each having an axis of rotation and each located opposite said one longitudinal edge of said material, means for mounting said drums transversely relative to said material in a manner their axis is in alignment relative to each other in a vertical plane and for retaining said drums in a shearing and non-shearing relationship with said material, said drums having cooperative arcuate surface areas and cooperative flat surface areas, arcuate knife means mounted around said arcuate surface area of said drum forming a continuous predetermined radius and extending across said arcuate surface which begins and ends at opposite locations relative to said flat surface area thereof to give a predetermined edge cut having a slope between the beginning and end of the edge cut that will be a continuous radius and of a desired length and depth, and means for synchronously rotating said drum means in relation to the speed of said material, including means for controlling the rotation of said drum means constructed in a manner so that in said inoperative mode said flat surface areas of said two drums oppose and are fixedly held adjacent each other so as not to be contacted by said travelling material, and in an operative mode said two drums commence to rotate in opposite directions but in the same direction of the travel of the material to bring said arcuate knife means on said each drum together in a cooperative contacting relationship with said material to effect said shearing and removing of said predetermined portion in said material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for shearing and removing a predetermined portion along at least one longitudinal edge of a travelling metallic material, the steps comprising:
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locating drum means along said longitudinal edge which drum means has at least two spaced-apart cooperative and rotatable drums between which said edge of said material passes and having an axis of rotation, mounting said drums which have cooperative arcuate surface areas and cooperative flat surface areas on said drums, transversely relative to said material in a manner their axis of rotation is in alignment relative to each other in a vertical plane and retaining said drums in a shearing and non-shearing relationship with said material, mounting arcuate knife means on said arcuate surfaces of said drums such as to produce a predetermined edge cut having a slope between the beginning and end of the edge cut that will be a continuous radius and of a desired length and depth, and synchronously rotating the drums in relation to the travelling material, including controlling the rotation of the drums such that in a non-shearing mode, the flat surface areas of the two cooperative drums oppose and are fixedly held in position adjacent each other so as not to be contacted by the material, and in a shearing mode, causing the two drums to commence rotating in opposite directions but in the same direction as the travel of the material to bring the arcuate knive means on the drums together in a cooperative contacting relationship with the material to effect shearing and removing of the predetermined portion of the travelling material. - View Dependent Claims (8, 9, 10, 11)
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Specification