High-speed shear for transversely cutting rolled strip

Abstract

A high-speed shear with a knife, particularly a chisel-type knife with a knife edge, arranged on at least one of two oppositely arranged drums, wherein the knife can be accelerated to the feeding speed of the rolled strip and the drums can be adjusted relative to each other for carrying out a cut. At least one drive unit provided for the drums serves to accelerate the drums to the speed of the rolled strip to be cut and at least one of the drums may be provided with a separately controllable adjusting device. The chisel-type knife of the knife drum is mounted so as to protrude from the cutting circle towards the anvil or the surface portion of the second drum acting as an anvil and to mount the chisel-type knife of the knife drum so as to be resiliently supported against a predetermined restoring force.

We claim:  
     
         1 . A high-speed shear comprising a knife drum and a counter-drum located opposite the knife drum, at least one knife having a knife cutting edge mounted on the knife drum, at least one drive unit for accelerating the drums to a speed corresponding to a feeding speed of a rolled strip to be cut, and at least one adjusting device for adjusting the drums relative to each other for carrying out a cut, the knife drum having a cutting circle, wherein the knife is mounted so as to protrude beyond the cutting circle towards the counter-drum, and wherein the knife is mounted so as to be resiliently supported with a predeterminable restoring force against at least one spring element.  
     
     
         2 . The high-speed shear according to    claim 1   , wherein the knife is a chisel-type knife.  
     
     
         3 . The high-speed shear according to    claim 1   , wherein the counter-drum has a surface portion acting as an anvil and interacting with the knife.  
     
     
         4 . The high-speed shear according to    claim 1   , wherein the counter-drum has an anvil interacting with the knife.  
     
     
         5 . The high-speed shear according to    claim 1   , wherein the knife is mounted so as to be resiliently supported in a radial guide means of the knife drum.  
     
     
         6 . The high-speed shear according to    claim 1   , wherein the knife is mounted so as to be resiliently supported on a link having a point of rotation, wherein the point of rotation of the link is located on the knife drum.  
     
     
         7 . The high-speed shear according to    claim 1   , wherein the knife is non-resiliently mounted in the knife drum, and wherein the adjusting device receiving the knife drum and bearings thereof is mounted so as to be resiliently supported with a predeterminable restoring force against a spring element.  
     
     
         8 . The high-speed shear according to    claim 5   , wherein the knife is mounted so as to be resiliently supported in the radial guide means against one of a steel spring and a steel spring stack.  
     
     
         9 . The high-speed shear according to    claim 1   , further comprising another adjusting device for adjusting at least one of a spring travel and a progressiveness of the spring element.  
     
     
         10 . The high-speed shear according to    claim 5   , wherein the knife is mounted so as to be supported in the radial guide means against a gas pressure spring.  
     
     
         11 . The high-speed shear according to    claim 1   , wherein the knife is mounted so as to be supported against an elastomer cushion.  
     
     
         12 . The high-speed shear according to    claim 1   , wherein the knife is mounted so as to be supported against a hydraulic liquid column interacting with a pressure reservoir.  
     
     
         13 . The high-speed shear according to    claim 1   , wherein the adjusting device receiving the knife drum with a bearing thereof is mounted so as to be supported by a mechanically, pneumatically or hydraulically yielding receiving means.  
     
     
         14 . The high-speed shear according to    claim 13   , wherein the receiving means is a spring strut.  
     
     
         15 . The high-speed shear according to    claim 1   , comprising means for synchronizing the circumferential speeds of the drums with each other for maintaining a defined cutting gap between the knife and the counter-drum and for synchronizing the circumferential speed of the drums with the strip feeding speed.  
     
     
         16 . The high-speed shear according to    claim 1   , comprising means for synchronizing the adjusting device with a rotation of the drums in such a way that adjusting movements of the adjusting device are concluded when the knife travels past and are reversed after the knife has passed.  
     
     
         17 . The high-speed shear according to    claim 15   , wherein the synchronization is effected electrically or electronically.  
     
     
         18 . The high-speed shear according to    claim 15   , wherein the synchronization is effected by gear means.  
     
     
         19 . The high-speed shear according to    claim 16   , wherein the synchronization is effected electrically or electronically.  
     
     
         20 . The high-speed shear according to    claim 16   , wherein the synchronization is effected by gear means.  
     
     
         21 . The high-speed shear according to    claim 1   , comprising a radial guide means, wherein the knife is resiliently mounted in the radial guide means with a linear row of resilient support elements.  
     
     
         22 . The high-speed shear according to    claim 1   , wherein the knife is a single-piece component, and wherein the knife is mounted to act elastically in the radial direction of the knife drum, further comprising segment-like spring elements for supporting the knife.  
     
     
         23 . The high-speed shear according to    claim 1   , wherein the knife is comprised of a plurality of knife segments, wherein one of a single and several of the knife segments are mounted so as to be supported by segment-like spring elements.