Method of shearing thin plate

Abstract

Provided is a method of shearing a thin plate with high quality without a need for narrowing a clearance by precision machining. The method comprises: placing a thin plate ( 1 ) having at least one non-metal layer ( 1 b ), between a punch ( 3 ) and a die ( 2 ) having a shearing hole ( 2 a ); and relatively moving the punch ( 3 ) toward and with respect to the shearing hole ( 2 a ) to thereby shear the thin plate ( 1 ), wherein the relative movement of the punch ( 3 ) is stopped to complete the shearing, before the punch ( 3 ) penetrates through the thin plate ( 1 ) and becomes fitted into the shearing hole ( 2 a ).

1 . A method of shearing a thin plate prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, comprising: placing the thin plate between a punch and a die having a shearing hole; and relatively moving the punch toward and with respect to the shearing hole to thereby shear the thin plate, wherein the relative movement of the punch is stopped to complete the shearing, before the punch penetrates through the thin plate and becomes fitted into the shearing hole. 
     
     
         2 . The method as defined in  claim 1 , wherein the metal layer of the thin plate has a thickness less than a total thickness of the one or more non-metal layers of the thin plate, and wherein the relative movement of the punch is stopped at a position corresponding to a depth in the thin plate which is equal to or greater than the thickness of the metal layer and equal to or less than the total thickness of the one or more non-metal layers. 
     
     
         3 . The method as defined in  claim 1 , wherein a plurality of the thin plates are stacked on each other to form a thin plate stack and placed between the punch and the die, and wherein the relative movement of the punch is stopped to complete the shearing, before the punch penetrates through the thin plate stack and becomes fitted into the shearing hole. 
     
     
         4 . The method as defined in  claim 3 , wherein the metal layer of the thin plate has a thickness less than a total thickness of the one or more non-metal layers of the thin plate, and wherein the relative movement of the punch is stopped at a position corresponding a depth in the thin plate stack which is equal to or greater than a total thickness of the metal layers of the thin plate stack and equal to or less than a total thickness of the non-metal layers of the thin plate stack. 
     
     
         5 . A method of shearing a thin plate made of a metal, comprising: placing the thin plate between a punch and a die having a shearing hole; and relatively moving the punch toward and with respect to the shearing hole to thereby shear the thin plate, wherein an intermediate plate having at least one non-metal layer is placed between the thin plate and the punch, and the relative movement of the punch is stopped to complete the shearing, before the punch penetrates through the intermediate plate. 
     
     
         6 . The method as defined in  claim 5 , wherein the thin plate has a thickness less than that of the intermediate plate, and wherein the relative movement of the punch is stopped at a position corresponding to a depth in a combination of the thin plate and the intermediate plate which is equal to or greater than the thickness of the thin plate and equal to or less than the thickness of the intermediate plate. 
     
     
         7 . A method of shearing a thin plate prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, comprising: inserting the thin plate between a die cutter provided with a convex push-cutting blade on a surface thereof, and an anvil roll provided with a shearing recess at a position corresponding to the convex push-cutting blade; and rotating and pressing the convex push-cutting blade of the die cutter toward the shearing recess of the anvil roll to thereby shear the thin plate, wherein the thin plate is sheared without causing the convex push-cutting blade of the die cutter to penetrate through the thin plate and become fitted into the shearing recess of the anvil roll. 
     
     
         8 . The method as defined in  claim 7 , wherein the metal layer of the thin plate has a thickness less than a total thickness of the one or more non-metal layers of the thin plate, and wherein the convex push-cutting blade of the die cutter is thrust to a position corresponding to a depth in the thin plate which is equal to or greater than the thickness of the metal layer and equal to or less than the total thickness of the one or more non-metal layers. 
     
     
         9 . The method as defined in  claim 7 , wherein a plurality of the thin plates are stacked on each other to form a thin plate stack and inserted between the die cutter and the anvil roll, wherein all of the thin plates are sheared without causing the convex push-cutting blade of the die cutter to penetrate through the thin plate stack and become fitted into the shearing recess of the anvil roll. 
     
     
         10 . The method as defined in  claim 9 , wherein the metal layer of the thin plate has a thickness less than a total thickness of the one or more non-metal layers of the thin plate, and wherein the convex push-cutting blade of the die cutter is thrust to a position corresponding to a depth in the thin plate stack which is equal to or greater than a total thickness of the metal layers of the thin plate stack and equal to or less than a total thickness of the non-metal layers of the thin plate stack. 
     
     
         11 . The method as defined in  claim 7 , wherein an intermediate plate having at least one non-metal layer is inserted between the die cutter and the thin plate or thin plate stack. 
     
     
         12 . The method as defined in  claim 11 , wherein the metal layer of the thin plate has a thickness less than a total thickness of the one or more non-metal layers of the thin plate and a thickness of the intermediate plate, and wherein the convex push-cutting blade of the die cutter is thrust to a position corresponding to a depth in a combination of the intermediate plate and the thin plate or thin plate stack which is equal to or greater than a total thickness of the metal layers of the thin plate or thin plate stack and equal to or less than a total thickness of the non-metal layers of the thin plate or thin plate stack and the intermediate plate. 
     
     
         13 . The method as defined in  claim 11 , wherein the intermediate plate is formed in an endless configuration, and wherein the intermediate plate is inserted between the die cutter and the thin plate or thin plate stack and then passed and pressed between a pair of rolls, whereafter the intermediate plate is re-inserted between the die cutter and the thin plate or thin plate stack. 
     
     
         14 . The method as defined in  claim 7 , wherein the shearing recess of the anvil roll has a peripheral edge region made of a material having hardness greater than that of the remaining region of the anvil roll. 
     
     
         15 . The method as defined in  claim 7 , wherein the anvil roll has at least two cutouts provided at respective positions before and after the shearing recess in a rotation direction thereof, with a given distance from the shearing recess. 
     
     
         16 . A method of shearing a thin plate made of a metal, comprising: inserting the thin plate between a die cutter provided with a convex push-cutting blade on a surface thereof, and an anvil roll provided with a shearing recess at a position corresponding to the convex push-cutting blade; and rotating and pressing the convex push-cutting blade of the die cutter toward the shearing recess of the anvil roll to thereby shear the thin plate, wherein an intermediate plate having at least one non-metal layer is inserted between the thin plate and the die cutter, and the thin plate is sheared without causing the convex push-cutting blade of the die cutter to penetrate through the intermediate plate and become fitted into the shearing recess of the anvil roll. 
     
     
         17 . The method as defined in  claim 16 , wherein the thin plate has a thickness less than that of the intermediate plate, and wherein the convex push-cutting blade of the die cutter is thrust to a position corresponding to a depth in a combination of the thin plate and the intermediate plate which is equal to or greater than the thickness of the thin plate and equal to or less than the thickness of the intermediate plate. 
     
     
         18 . The method as defined in  claim 16 , wherein the intermediate plate is formed in an endless configuration, and wherein the intermediate plate is inserted between the die cutter and the thin plate and then passed and pressed between the die cutter and the anvil roll, whereafter the intermediate plate is re-inserted between the die cutter and the thin plate. 
     
     
         19 . The method as defined in  claim 16 , wherein the shearing recess of the anvil roll has a peripheral edge region made of a material having hardness greater than that of the remaining region of the anvil roll. 
     
     
         20 . The method as defined in  claim 16 , wherein the anvil roll has at least two cutouts provided at respective positions before and after the shearing recess in a rotation direction thereof, with a given distance from the shearing recess. 
     
     
         21 . A method of shearing a thin plate which is made of a metal or prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, comprising: inserting the thin plate between a press roll, and an anvil roll provided with a shearing recess; and rotating the press roll to press the thin plate toward the shearing recess of the anvil roll to thereby shear the thin plate, wherein an intermediate plate having at least one non-metal layer is inserted between the thin plate and the press roll, and the thin plate is sheared without pressing the thin plate into the shearing recess of the anvil roll beyond a thickness of the thin plate. 
     
     
         22 . The method as defined in  claim 21 , wherein the thin plate is prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, and wherein the thin plate is pressed to a position corresponding to a depth in the shearing recess of the anvil roll which is equal to or greater than a thickness of the metal layer and equal to or less than a total thickness of the one or more non-metal layers of the thin plate. 
     
     
         23 . The method as defined in  claim 21 , wherein the thin plate is prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, and wherein a plurality of the thin plates are stacked on each other to form a thin plate stack, and wherein the intermediate plate having at least one non-metal layer is inserted between the thin plate stack and the press roll, and the thin plate stack is sheared without pressing the thin plate stack into the shearing recess of the anvil roll beyond a thickness of the thin plate stack. 
     
     
         24 . The method as defined in  claim 23 , wherein the thin plate stack is pressed to a position corresponding to a depth in the shearing recess of the anvil roll which is equal to or greater than a total thickness of the metal layers of the thin plate stack and equal to or less than a total thickness of the non-metal layers of the thin plate stack. 
     
     
         25 . The method as defined in  claim 21 , wherein the intermediate plate is formed in an endless configuration, and wherein the intermediate plate is inserted between the press roll and the thin plate or thin plate stack and then passed and pressed between a pair of rolls, whereafter the intermediate plate is re-inserted between the press roll and the thin plate or thin plate stack. 
     
     
         26 . The method as defined in  claim 21 , wherein the shearing recess of the anvil roll has a peripheral edge region made of a material having hardness greater than that of the remaining region of the anvil roll. 
     
     
         27 . The method as defined in  claim 21 , wherein the anvil roll has at least two cutouts provided at respective positions before and after the shearing recess in a rotation direction thereof, with a given distance from the shearing recess. 
     
     
         28 . A method of shearing a thin plate which is made of a metal or prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, comprising: inserting the thin plate between a press roll having a surface coated with a layer including at least one non-metal layer, and an anvil roll provided with a shearing recess; and rotating the press roll to press the thin plate toward the shearing recess of the anvil roll to thereby shear the thin plate, wherein the thin plate is sheared without pressing the thin plate into the shearing recess of the anvil roll beyond a thickness of the thin plate. 
     
     
         29 . The method as defined in  claim 28 , wherein the thin plate is prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, and wherein the thin plate is pressed to a position corresponding to a depth in the shearing recess of the anvil roll which is equal to or greater than a thickness of the metal layer and equal to or less than a total thickness of the one or more non-metal layers of the thin plate. 
     
     
         30 . The method as defined in  claim 28 , wherein the thin plate is prepared by laminating one or more non-metal layers on one or respective ones of opposite surfaces of a metal layer, and wherein a plurality of the thin plates are stacked on each other to form a thin plate stack, and wherein the thin plate stack is inserted between the press roll and the anvil roll, and sheared without pressing the thin plate stack into the shearing recess of the anvil roll beyond a thickness of the thin plate stack. 
     
     
         31 . The method as defined in  claim 30 , wherein the thin plate stack is pressed to a position corresponding to a depth in the shearing recess of the anvil roll which is equal to or greater than a total thickness of the metal layers of the thin plate stack and equal to or less than a total thickness of the non-metal layers of the thin plate stack. 
     
     
         32 . The method as defined in  claim 28 , wherein the shearing recess of the anvil roll has a peripheral edge region made of a material having hardness greater than that of the remaining region of the anvil roll. 
     
     
         33 . The method as defined in  claim 28 , wherein the anvil roll has at least two cutouts provided at respective positions before and after the shearing recess in a rotation direction thereof, with a given distance from the shearing recess.