Flying shear for cross-cutting moving sheet-metal strip

Claim 2

Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, and cutting stroke control means for varying the distance said first bar moves in the cutting direction toward said second bar means independently of the rotational speed of the drive shaft, said cutting stroke control means including means engaged with a member of said drive train means, wherein said first reciprocating means includes a movable driving member attached to only one of said cutting bars and linear guide means interconnecting said cutting bars with one another for similar movement in the travel direction, and wherein said linear guide means includes a coupling member and first and second guide arms, said coupling member being pivotally connected to one of said cutting bars at a position intermediate the ends of said coupling member by a coupling pivot pin, said first guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to an end of said coupling member, said second guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to the end of said coupling member which is opposite the end of said coupling member connected to said first guide arm.

Claim 3

Apparatus according to claim 1, wherein said drive train means includes a crank member rotatable with said drive shaft and first and second levers, one end of said first lever being pivotally connected to a part which is movable with said frist bar in the cutting direction, the other end of said first lever being pivotally connected to one end of said second lever, the other end of said second lever being connected to said crank member, said seconD lever being pivotal about a pivot axle arranged intermediate the ends thereof.

Claim 4

Apparatus according to claim 2, wherein said cutting stroke control means includes a press rod having one end thereof connected to said pivot axle and means for changing the position of said press rod and pivot axle.

Claim 5

Apparatus according to claim 3, wherein the other end of said press rod is connected to a press rod axle by eccentric gear means, and wherein a rack is drivingly engaged with said eccentric gear means for changing the position of said press rod and pivot axle in directions transverse to the longitudinal extent of said pivot axle.

Claim 6

Apparatus according to claim 1, wherein said driving member is attached to said first cutting bar, and wherein said coupling member is pivotally connected to said second cutting bar.

Claim 7

Apparatus according to claim 1, wherein each cutter bar includes a slide and a cutter holder connected for movement together in the travel direction of the sheet material, wherein said coupling pivot pin is supported at the slide of said one of said cutting bars.

Claim 8

Apparatus according to claim 6, wherein said cutter holders are mounted for pivotal movement about a common axis which extends in the cutting direction, and wherein holder pivoting means are provided for imparting pivotal movement to said cutter holders.

Claim 9

Apparatus according to claim 7, wherein said cutter holder pivoting means includes a pair of spaced piston-cylinder means for said cutter holder.

Claim 10

Apparatus according to claim 8, wherein adjustable stop means are provided in each piston-cylinder means for limiting the stroke of relative movement of a piston and cylinder of each of said piston-cylinder means, wherein the piston-cylinder means for said cutter bar are arranged at opposite sides of said common axis with the piston thereof connected to one of said respective slide and cutter bar and the cylinder thereof connected to the other of said respective slide and cutter bar.

Claim 11

Apparatus according to claim 1, wherein the joints connecting the guide arms at the cutter bar and/or at the coupling member have eccentric bearings.

Claim 12

Apparatus according to claim 1, wherein said sheet material is sheet-metal strip material, and further comprising feed roller means engageable with said strip material for feeding said material in the travel direction at a constant speed.

Claim 13

Apparatus according to claim 11, further comprising means for rotatably driving said drive shaft at a constant rotative speed.

Claim 14

Apparatus according to claim 12, wherein said cutting stroke control means includes means for shortening the distance said first bar moves to such an extent that no cutting takes place on strip material being fed between said first and second cutting bars.

Claim 15

Apparatus according to claim 13, wherein said drive train means includes a crank member rotatable with said drive shaft and first and second levers, one end of said first lever being pivotally connected to a part which is movable with said first bar in the cutting direction, the other end of said first lever being pivotally connected to one end of said second lever, the other end of said second lever being connected to said crank member, said second lever being pivotal about a pivot axle arranged intermediate the ends thereof.

Claim 16

Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive Shaft and drive train means drivingly connecting said drive shaft to said first bar, and cutting stroke control means for varying the distance said first bar moves in the cutting direction toward said second bar means independently of the rotational speed of the drive shaft, said cutting stroke control means including means engaged with a member of said drive train means, wherein each cutter bar includes a slide and a cutter holder connected for movement together in the travel direction of the sheet material, and wherein said cutter holders are mounted for pivotal movement about a common axis which extends in the cutting direction, wherein cutter holder pivoting means are provided for imparting pivotal movement to said cutter holders, wherein said cutter holder pivoting means includes a pair of spaced piston-cylinder means for said cutter holder, and wherein adjustable stop means are provided in each piston-cylinder means for limiting the stroke of relative movement of a piston and cylinder of each of said piston-cylinder means, wherein the piston-cylinder means for said cutter bar are arranged at opposite sides of said common axis with the piston thereof connected to one of said respective slide and cutter bar and the cylinder thereof connected to the other of said respective slide and cutter bar.

Claim 17

Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive Shaft and drive train means drivingly connecting said drive shaft to said first bar, and cutting stroke control means for varying the distance said first bar moves in the cutting direction toward said second bar means independently of the rotational speed of the drive shaft, said cutting stroke control means including means engaged with a member of said drive train means, wherein each cutter bar includes a slide and a cutter holder connected for movement together in the travel direction of the sheet material, and wherein said cutter holders are mounted for pivotal movement about a common axis which extends in the cutting direction, wherein cutter holder pivoting means are provided for imparting pivotal movement to said cutter holders, wherein said cutter holder pivoting means includes a pair of spaced piston-cylinder means for said cutter holder, and wherein adjustable stop means are provided in each piston-cylinder means for limiting the stroke of relative movement of a piston and cylinder of each of said piston-cylinder means, wherein the piston-cylinder means for said cutter bar are arranged at opposite sides of said common axis with the piston thereof connected to one of said respective slide and cutter bar and the cylinder thereof connected to the other of said respective slide and cutter bar.

Claim 18

Apparatus according to claim 15, wherein said drive train means includes a crank member rotatable with said drive shaft and first and second levers, one end of said first lever being pivotally connected to a part which is movable with said first bar in the cutting direction, the other end of said first lever being pivotally connected to one end of said second lever, the other end of said second lever being connected to said crank member, said second lever being pivotal about a pivot axle arranged intermediate the ends thereof.

Claim 19

Apparatus according to claim 16, wherein said cutting stroke control means includes a press rod having one end thereof connected to said pivot axle and means for changing the position of said press rod and pivot axle.

Claim 20

Apparatus according to claim 17, wherein the other end of said press rod is connected to a press rod axle by eccentric gear means, and wherein a rack is drivingly engaged with said eccentric gear means for changing the position of said press rod and pivot axle in directions transverse to the longitudinal extent of said pivot axle.

Claim 21

Apparatus according to claim 16, wherein said first reciprocating means includes a movable driving member attached to only one of said cutting bars and linear guide means interconnecting said cutting bars with one another for similar movement in the travel direction.

Claim 22

Apparatus according to claim 19, wherein said linear guide means includes a coupling member and first and second guide arms, said coupling member being pivotally connected to one of said cutting bars at a position intermediate the ends of said coupling member by a coupling pivot pin, said first guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to an end of said coupling member, said second guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to the end of said coupling member which is opposite the end of said coupling member connected to said first guide arm.

Claim 23

Apparatus according to claim 20, wherein said driving member is attached to said first cutting bar, and wherein said coupling member is pivotally connected to said second cutting bar.

Claim 24

Apparatus according to claim 1, wherein each cutter bar includes a slide and a cutter holder connected for movement together in the travel direction of the sheet material, and wherein said cutter holders are mounted for pivotal movement about a common axis which extends in the cutting direction.

Claim 25

Flying shear apparatus for cross-cutting moving sheet material comprising: A first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, and second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, wherein said first reciprocating means includes a movable driving member attached to only one of said cutting bars and linear guide means interconnecting said cutting bars with one another for similar movement in the travel direction, and wherein said linear guide means includes a coupling member and first and second guide arms, said coupling member being pivotally connected to one of said cutting bars at a position intermediate the ends of said coupling member by a coupling pivot pin, said first guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to an end of said coupling member, said second guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to the end of said coupling member which is opposite the end of said coupling member connected to said first guide arm.

Claim 26

Flying shear apparatus for cross-cutting moving sheet material comprising: A first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, and second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, wherein said first reciprocating means includes a movable driving member attached to only one of said cutting bars and linear guide means interconnecting said cutting bars with one another for similar movement in the travel direction, and wherein said linear guide means includes a coupling member and first and second guide arms, said coupling member being pivotally connected to one of said cutting bars at a position intermediate the ends of said coupling member by a coupling pivot pin, said first guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to an end of said coupling member, said second guide arm having one end thereof pivotally connected to the other of said cutting bars and the other end thereof pivotally connected to the end of said coupling member which is opposite the end of said coupling member connected to said first guide arm.

Claim 27

Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, and second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, wherein each cutter bar includes a slide and a cutter holder connected for movement together in the travel direction of the sheet material, and wherein said cutter holders are mounted for pivotal movement about a common axis which extends in the cutting direction, wherein cutter holder pivoting means are provided for imparting pivotal movement to said cutter holders, wherein said cutter holder pivoting means includes a pair of spaced piston-cylinder means for said cutter holder, and wherein adjustable stop means are provided in each piston-cylinder means for limiting the stroke of relative movement of a piston and cylinder of each of said piston-cylinder means, wherein the piston-cylinder means for said cutter bar are arranged at opposite sides of said common axis with the piston thereof connected to one of said respective slide and cutter bar and the cylinder thereof connected to the other of said respective slide and cutter bar.

Claim 28

Flying shear apparatus for cross-cutting moving sheet material comprising: a first cutting bar, a second cutting bar, first reciprocating means for reciprocating both of said bars in the travel direction of the sheet material, and second reciprocating means for reciprocating said first bar in a cutting direction transverse to said travel direction, said first and second cutting bars being positioned in opposing relationship to one another such that said cutting bars cooperate to cut said sheet material upon a predetermined relative movement of said cutting bars in the cutting direction, said second reciprocating means including a rotatable drive shaft and drive train means drivingly connecting said drive shaft to said first bar, wherein each cutter bar includes a slide and a cutter holder connected for movement together in the travel direction of the sheet material, and wherein said cutter holders are mounted for pivotal movement about a common axis which extends in the cutting direction, wherein cutter holder pivoting means are provided for imparting pivotal movement to said cutter holders, wherein said cutter holder pivoting means includes a pair of spaced piston-cylinder means for said cutter holder, and wherein adjustable stop means are provided in each piston-cylinder means for limiting the stroke of relative movement of a piston and cylinder of each of said piston-cylinder means, wherein the piston-cylinder means for said cutter bar are arranged at opposite sides of said common axis with the piston thereof connected to one of said respective slide and cutter bar and the cylinder thereof connected to the other of said respective slide and cutter bar.