CA2338217C - Method and device for guiding and supporting a thin sheet or metal strip - Google Patents
Method and device for guiding and supporting a thin sheet or metal strip Download PDFInfo
- Publication number
- CA2338217C CA2338217C CA002338217A CA2338217A CA2338217C CA 2338217 C CA2338217 C CA 2338217C CA 002338217 A CA002338217 A CA 002338217A CA 2338217 A CA2338217 A CA 2338217A CA 2338217 C CA2338217 C CA 2338217C
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- Canada
- Prior art keywords
- strip
- medium
- drums
- drum
- metal
- Prior art date
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 85
- 239000002184 metal Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000011664 signaling Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
- B23D25/12—Shearing machines with blades on coacting rotating drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Advancing Webs (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Accessories And Tools For Shearing Machines (AREA)
- Metal Rolling (AREA)
- Coating With Molten Metal (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
The invention relates to a method and a device for guiding and supporting a comparatively thin sheet or metal strip (1) during transport over a conveying device (10) such as a rolling viable and/or during, before or after a cutting process taking place when passing through shears (3). The invention is characterized in that the sheet or metal strip (1) at least on its lower side (1') is subjected to high-energy beams (2, 2') of a liquid or gaseous medium emitted by jet nozzles (5, 5') and thus supported and guided by pulse energy.
Description
Method and Device for Guiding and Supporting a Thin Sheet or Metal Strip The invention relates to a method as well as a device for guiding and supporting a comparatively thin sheet metal or metal strip during transport across a conveying device, such as a rolling table, and/or during, before or after a cutting process when passing through shears, wherein the sheet metal or strip at least at its underside is loaded with an energy-rich bundle of jets of a liquid or gaseous medium and is thereby supported and guided by means of impulse energy and the medium is guided under pressure through supply channels in the interior of the transport and/or blade carrier drums to jet nozzles at their periphery and exits as a closed jet from them before and/or behind the support areas of the drum, or as closely as possible adjacent to the blades of the blade drum, against the sheet metal or strip at a slant or a substantially perpendicular angle relative to the sheet metal or s t r i p .
In the rolling technology, it has been proven particularly difficult in practice to safely guide thin sheet metal or strips across a conveying device, such as a rolling table, or to shears because thin strips have the tendency to drop or lift after leaving a guiding element and, as a result of this, to impact a subsequently arranged device or a guide element or to fly up and to thereby become deformed. In particular, this problem is observed in connection with shears, without cutting action but also during cutting, when the leading edge of the strip passes through.
In accordance with the developmental tendency toward sheet metal or metal strips that are thinner and thinner, in particular, of non-ferrous metals such as copper or aluminum, but also in connection with very thin steel sheet, this phenomenon results in increasingly greater difficulties. Up to now, no practice-oriented and safe solution h a s b a a n found for overcoming them.
DE 14 27 231 discloses a device for dividing rolling stock, in particular, sheet metal strips to commercial lengths by means of shears with carriages with a clamping member, wherein the the carriages are arranged at the inlet side upstream of the shears and movable along the transport path. The clamping carriage arranged at the inlet side continuously measures the advancement of the sheet metal by means of a pulse generator within the pulse graduation.
When a preselected partial length of the sheet metal p o rt i o n has passed through the cutting plane of the shears, the sheet metal advancement is stopped by means of a digital control member. The one or more clamping carriages grip the transported g o o d s from above and c o m p r i s a , for temporary coupling the transported goods, solenoids or tongues that are hydraulically operated or operated by known means.
The closest prior art is disclosed in the document DE-C 944 919. This document discloses a method for guiding and supporting a material strip during transport across a conveying device such as a roll table and/or during, before or after a cutting process when passing through shears, wherein the material strip is supported at least at its underside with energy-rich bundles of jets of a gaseous medium and is thereby supported and guided by impulse energy.
The g a s a o a s m a d i a m is guided out of the interior of the drums by means of j et nozzles on the drum periphery.
Based on the aforementioned prior art, it is an object of the invention to safely guide thin sheet metal or s t r i p s d a r i n g transport across a conveying device, such as a roll t a b 1 a , and/or during, before or after a cutting process when passing through shears and to have the medium act only in that area which is beneficial for stabilizing the strip, and, on the other hand, t o prevent an ineffective media use and, at the same time, to avoid flooding of the surroundings of the strip or the shears and the transport device with excess medium.
As a solution to this object it is proposed with the invention in connection with a method for guiding and supporting a comparatively thin sheet metal or metal strip during transport across a conveying device, such as a rolling table and/or during, before or after a cutting process when passing through shears wherein the sheet metal or strip is loaded at least form its underside with energy-rich jet bundles of liquid or gaseous medium and is thus supported and guided by means of impulse energy, that the medium, by means of a rotary valve arranged at an end face of the rotatable transport or blade drum, exits in a limited angular position of a drum from jet nozzles directed against the sheet metal or metal strip.
In the rolling technology, it has been proven particularly difficult in practice to safely guide thin sheet metal or strips across a conveying device, such as a rolling table, or to shears because thin strips have the tendency to drop or lift after leaving a guiding element and, as a result of this, to impact a subsequently arranged device or a guide element or to fly up and to thereby become deformed. In particular, this problem is observed in connection with shears, without cutting action but also during cutting, when the leading edge of the strip passes through.
In accordance with the developmental tendency toward sheet metal or metal strips that are thinner and thinner, in particular, of non-ferrous metals such as copper or aluminum, but also in connection with very thin steel sheet, this phenomenon results in increasingly greater difficulties. Up to now, no practice-oriented and safe solution h a s b a a n found for overcoming them.
DE 14 27 231 discloses a device for dividing rolling stock, in particular, sheet metal strips to commercial lengths by means of shears with carriages with a clamping member, wherein the the carriages are arranged at the inlet side upstream of the shears and movable along the transport path. The clamping carriage arranged at the inlet side continuously measures the advancement of the sheet metal by means of a pulse generator within the pulse graduation.
When a preselected partial length of the sheet metal p o rt i o n has passed through the cutting plane of the shears, the sheet metal advancement is stopped by means of a digital control member. The one or more clamping carriages grip the transported g o o d s from above and c o m p r i s a , for temporary coupling the transported goods, solenoids or tongues that are hydraulically operated or operated by known means.
The closest prior art is disclosed in the document DE-C 944 919. This document discloses a method for guiding and supporting a material strip during transport across a conveying device such as a roll table and/or during, before or after a cutting process when passing through shears, wherein the material strip is supported at least at its underside with energy-rich bundles of jets of a gaseous medium and is thereby supported and guided by impulse energy.
The g a s a o a s m a d i a m is guided out of the interior of the drums by means of j et nozzles on the drum periphery.
Based on the aforementioned prior art, it is an object of the invention to safely guide thin sheet metal or s t r i p s d a r i n g transport across a conveying device, such as a roll t a b 1 a , and/or during, before or after a cutting process when passing through shears and to have the medium act only in that area which is beneficial for stabilizing the strip, and, on the other hand, t o prevent an ineffective media use and, at the same time, to avoid flooding of the surroundings of the strip or the shears and the transport device with excess medium.
As a solution to this object it is proposed with the invention in connection with a method for guiding and supporting a comparatively thin sheet metal or metal strip during transport across a conveying device, such as a rolling table and/or during, before or after a cutting process when passing through shears wherein the sheet metal or strip is loaded at least form its underside with energy-rich jet bundles of liquid or gaseous medium and is thus supported and guided by means of impulse energy, that the medium, by means of a rotary valve arranged at an end face of the rotatable transport or blade drum, exits in a limited angular position of a drum from jet nozzles directed against the sheet metal or metal strip.
Further advantageous embodiments of the method according to the invention are provided a c c o r d i n g t o t h a features of the dependent claims.
Because the stabilization of the strip and particularly of the 1 a a d i n g a d g a o f the strip or of the s t r i p head is not provided by mechanical means, but by means of impulse energy of a j et bundle of a liquid or gaseous medium, a collision or impact of the strip or the leading edge of the strip or the strip head on a construction component of any possible type of the roll table or the shears is safely prevented. The jet nozzles can be arranged according to the invention about the entire strip width or across the entire drum length.
With the inventively important embodiment of the method, according to which the medium flows out of jet nozzles oriented against the sheet metal or the strip in a limitable angular position of one drum by employing a rotary valve, preferably arranged in an end face of a rotatable transport drum or blade carrier drum, it is achieved in an advantageous way that the medium is effective only in the area which is beneficial for stabilizing the strip and that, on the other hand, no inefficient media use takes place. At the same time, overflowing of the direct vicinity of the strip or the shears of the conveying device with excess medium is prevented.
One embodiment of the method provides that for chisel-type shears comprising a lower or upper drum, provided with a cutting chisel, and a counter drum configured as an anvil, the sheet metal or strip to be cut is loaded with at least one medium jet, respectively, out of each of the drums preferably before and/or behind the cutting plane from above and/or from below. This provides a particularly efficient s t a b i 1 i z a t i o n o f the strip or sheet metal passing through, and this in connection with an economically acceptable expenditure of stabilizing medium.
According to another embodiment of the method it is provided that in connection with shearing-off shears, comprising a blade drum each with a blade having oppositely oriented cutting edges, respectively, the sheet metal or strip to be cut is loaded before and/or behind the separating plane with a supporting medium jet or a plurality of such medium j ets from above and/or from below.
This achieves the goal that the strip or sheet metal is lifted off the blade drum in order to better guide it to the devices downstream. For example, the jet nozzles in the smooth anvil drum are to prevent riveting and thus adhesion of the cut leading edge of the strip, and, moreover, an adhesion on the chisel or blade.
Finally, the method according to the invention provides further that during advancing o f the sheet metal or strip, in particular, during introduction of its head into the shears, the entry of the head into the area of a guide wedge, arranged stationarily upstream of the shears, as well as its advancing speed are determined by a signaling device and the head is loaded from below by at least one row of medium jets exiting from the guide wedge approximately perpendicularly against the sheet metal or strip and is guided thereby.
A device for guiding and supporting a thin sheet metal or metal strip, in particular, for performing the method according to the invention, comprising transport drums and/or blade carrier drums, wherein the drums at their periphery have jet nozzles arranged in axis-parallel alignment in at least one row which, upon loading with a medium, are oriented against the top surface and /or bottom surface of the sheet metal or the metal strip, wherein the jet nozzles are connectable, starting at supply channels extending in the interior of the drums is characterized in that between the supply channels of a drum and a source for the medium to be supplied under pressure at least one pump and at least one rotary valve are arranged and in that the rotary valve is preferably arranged at an end face of a drum.
Further advantageous embodiments of the device are provided according to the characterizing features of the dependant claims of the device.
In this connection, the measure can be used advantageously that in the case of a drum provided with a blade or a cutting chisel the jet nozzles of a row are arranged as closely as possible adjacent to the blade and/or the chisel.
Because the stabilization of the strip and particularly of the 1 a a d i n g a d g a o f the strip or of the s t r i p head is not provided by mechanical means, but by means of impulse energy of a j et bundle of a liquid or gaseous medium, a collision or impact of the strip or the leading edge of the strip or the strip head on a construction component of any possible type of the roll table or the shears is safely prevented. The jet nozzles can be arranged according to the invention about the entire strip width or across the entire drum length.
With the inventively important embodiment of the method, according to which the medium flows out of jet nozzles oriented against the sheet metal or the strip in a limitable angular position of one drum by employing a rotary valve, preferably arranged in an end face of a rotatable transport drum or blade carrier drum, it is achieved in an advantageous way that the medium is effective only in the area which is beneficial for stabilizing the strip and that, on the other hand, no inefficient media use takes place. At the same time, overflowing of the direct vicinity of the strip or the shears of the conveying device with excess medium is prevented.
One embodiment of the method provides that for chisel-type shears comprising a lower or upper drum, provided with a cutting chisel, and a counter drum configured as an anvil, the sheet metal or strip to be cut is loaded with at least one medium jet, respectively, out of each of the drums preferably before and/or behind the cutting plane from above and/or from below. This provides a particularly efficient s t a b i 1 i z a t i o n o f the strip or sheet metal passing through, and this in connection with an economically acceptable expenditure of stabilizing medium.
According to another embodiment of the method it is provided that in connection with shearing-off shears, comprising a blade drum each with a blade having oppositely oriented cutting edges, respectively, the sheet metal or strip to be cut is loaded before and/or behind the separating plane with a supporting medium jet or a plurality of such medium j ets from above and/or from below.
This achieves the goal that the strip or sheet metal is lifted off the blade drum in order to better guide it to the devices downstream. For example, the jet nozzles in the smooth anvil drum are to prevent riveting and thus adhesion of the cut leading edge of the strip, and, moreover, an adhesion on the chisel or blade.
Finally, the method according to the invention provides further that during advancing o f the sheet metal or strip, in particular, during introduction of its head into the shears, the entry of the head into the area of a guide wedge, arranged stationarily upstream of the shears, as well as its advancing speed are determined by a signaling device and the head is loaded from below by at least one row of medium jets exiting from the guide wedge approximately perpendicularly against the sheet metal or strip and is guided thereby.
A device for guiding and supporting a thin sheet metal or metal strip, in particular, for performing the method according to the invention, comprising transport drums and/or blade carrier drums, wherein the drums at their periphery have jet nozzles arranged in axis-parallel alignment in at least one row which, upon loading with a medium, are oriented against the top surface and /or bottom surface of the sheet metal or the metal strip, wherein the jet nozzles are connectable, starting at supply channels extending in the interior of the drums is characterized in that between the supply channels of a drum and a source for the medium to be supplied under pressure at least one pump and at least one rotary valve are arranged and in that the rotary valve is preferably arranged at an end face of a drum.
Further advantageous embodiments of the device are provided according to the characterizing features of the dependant claims of the device.
In this connection, the measure can be used advantageously that in the case of a drum provided with a blade or a cutting chisel the jet nozzles of a row are arranged as closely as possible adjacent to the blade and/or the chisel.
In a further development of the invention it is provided that the guide wedges comprise jet nozzles on supply channels provided for media and that the latter are connected to media supply lines with a pressure pump and a media source arranged therein and that above the sheet metal or strip a signal device monitoring the entry of the strip is arranged which communicates by means of a control signal line with the motor of the pump.
Accordingly, in one aspect, the present invention resides in method of guiding and supporting a comparatively thin metal sheet or metal strip (1) during transport by way of a conveying device (10) such as a roller path, and/or during, before or after a separating process on running through a cutter (3), wherein the metal sheet or strip (1) is acted on at least from its underside ( 1') by energy-rich j ets (2, 2') of a liquid or gaseous medium and in that case supported and guided by means of pulsed energy and the medium is conducted under pressure through feed channels (4) in the interior of transport and/or knife carrier drums (7, 8) to nozzles (5) at the peripheries thereof and flows out of these in front of and/or behind the carrier regions of the drums or as close as possible to the knives (6) of the knife drums (8) obliquely or at an approximately perpendicular angle relative to the metal sheet or strip (1) in a closed jet against this, wherein the medium flows out of nozzles (5), which are directed against the metal plate or metal sheet (1), at a confinable angular setting of a drum (7, 8) with use of a rotary slide valve (9) preferably arranged at an end face of a rotatable transport or knife carrier drum (7, 8).
In yet a further aspect, the present invention resides in a device for guiding and supporting a thin metal sheet or metal strip (1), comprising transport drums and/or knife carrier drums (7, 8) which have, at their periphery in axially parallel orientation, jets (5) which are arranged in at least row and which on loading with a medium point towards the upper and/or lower surface of the metal sheet or metal strip, wherein the jets (5) are connectible by feed channels (4), which extend in the interiors of the drums (7, 8) to sources (25), which are provided outside the drums, with connecting elements (21, 21') for medium feedable under pressure, wherein at least one pump (22) and at least one rotary slide valve (9) are arranged between the feed channels (4) of a drum (7, 8) and a source (25) for a medium feedable under pressure and the valve is preferably arranged at an end face of a drum (7, 8).
BRIEF DESCRIPTION OF THE DRAWINGS
Further details, features, and advantages of the invention result from the following explanation of several embodiments illustrated schematically in the drawings it is shown in:
Fig. 1 in a representation similar to a flow sheet a transport drum with supply channels and jet nozzles arranged therein, with a rotary valve at the end face, pressure pump, and media source;
Fig. 2 in a side view and partially in section, shearing-off shears with an arrangement of the jet nozzles according to the invention Fig. 3 in a side view a similar arrangement with chisel-type shears furnished according to the invention with jet nozzles;
Fig. 4 in a side view shears with stationary guide wedges arranged upstream and downstream and with jet nozzles arranged therein.
The purely schematic illustration of Fig. 1 shows supply channels 4 arranged in a transport drum 7 for supplying the jet nozzles 5 and 5' formed therein. Opposite the end face of the transport drum 7 a rotary valve 9 is arranged which is connected with a central bore 20 to a conveying line 23, extending from a pressure pump 22, for a liquid medium.
The rotary valve 9 is arranged so as to be non-rotatable while the transport drum 7 rotates relative thereto, when functioning as a transport drum 7 or blade drum 8, as is known, in the art.
Connecting channels 21, 21' beginning at the central bore 20 and having exit openings at the side facing the end face of the transport drum 7 are provided in the rotary valve 9.
Medium that is under pressure is released always when the openings of the supply channels 4 coincide with the oppositely oriented openings of the connecting channels 21 in the rotational direction to thus allow flow in a limited angular range. In other angular positions of the transport drum 7, the supply channels 4 of the transport drum 7 cannot be flushed with pressure medium. It is also possible to adjust different ejection widths with the jet nozzles.
Moreover, the pressure pump 22 with its motor 22' can be controlled via a signal and switching device, similar to the device illustrated i n Fig. 4, for example, according to the requirements of an incoming metal strip 1. The pressure pump 22 takes in a liquid medium from the medium source 25 through the intake line 24.
Fig. 2 shows as an example a blade carrier drum 8, 8' with a device for guiding and supporting a comparatively thin sheet metal or metal strip 1. The blade carrier drums are provided with blades 6 in a manner known in the art which interact with one another and cut the metal strip 1 in the cutting plane y-y when contacting one another.
The latter is transported on the rolling table 10 and during the cutting process is guided and stabilized from below or from below and from above by bundles of jets 2, 2' exiting from the jet nozzles 5. The jet nozzles 5, 5' are arranged such that they secure at both sides of the cutting plane y-y the strip 1 in the given position and, in particular, prevent a slanting out of the transport direction. Moreover, in regard to the shearing-off shears 13, same elements are identified with same reference numerals.
In Fig. 3 a similar arrangement is shown with the difference that the shears are chisel-type shears 3 with a cutting chisel 11 wherein a counter drum 8' is correlated with the blade drum 8 provided with the chisel. In this connection, it must be prevented that the strip 1 during cutting by the cutting chisel 11 is riveted to the smooth surface or adheres thereto because then the cut leading edge of the strip would be deformed. Accordingly, the blade drum 8 and, in particular, the anvil drum 8' are provided with supply channels 4 in the aforementioned axis-parallel arrangement which have jet nozzles from which jet bundles 2, 2' of a liquid medium exit and reliably prevent the leading edge of the strip that has been cut from being riveted to or adhering on the counter drum 8'.
Fig. 4 shows a further similar arrangement with chisel-type shears 3 in which between the shears and the rolling table 10 guide wedges 15 are arranged. They have jet nozzles 5 for medium-loaded supply, channels 4 which are connected to medium supply lines 29 having a pressure pump 27 arranged therein. Above the sheet metal or metal strip 1 a signaling device 19 monitoring the introduction of the strip at the strip head 16 is provided, wherein the signaling device is in communication via a signal line 26 with the motor 28 of the pressure pump. The pressure pump is supplied with the 1 i q a i d medium in a manner known in the art from the medium source 25 by means of a suction line. The passage of the strip head 16 of the metal strip 1 is detected by the signaling device 19 which then activates via the signal line 26 the switch for the motor 28 and thus starts the pressure pump 27. The latter conveys the pressure medium through the supply line 29 via the supply channels 4 to the jet nozzles 5. The principle holds true for all jet nozzles, also those in the drums. A signaling device must detected the strip head and the cut. The jet nozzles are then loaded only briefly at the strip head and the cut. The signal can also be used by a device which is already present anyway.
Moreover, the chisel drum of the chisel-type shears 3 is in communication via the rotary valve 9 (not shown in Fig. 4) with this supply channel 4' and the jet nozzles 5' such that a bundled medium jet 2' exits with high energy from below against the metal strip 1 in the area of the strip head 16 and prevents that the comparatively thin and bendable strip 1 bends downwardly and impacts against the guide wedge 15' to the right and is thereby deformed.
Only during the further course of the strip transport, after a certain amount of time or a measured advancing of the metal strip 1, the chisel-type shears 3 are activated and a predetermined length of strip is cut off, wherein the supply channels 4 " of the, chisel drum and the counter drum previously unused cooperate with the rotary valve 9 take over the guiding of the strip 1 by means of energy-rich media jets.
Accordingly, in one aspect, the present invention resides in method of guiding and supporting a comparatively thin metal sheet or metal strip (1) during transport by way of a conveying device (10) such as a roller path, and/or during, before or after a separating process on running through a cutter (3), wherein the metal sheet or strip (1) is acted on at least from its underside ( 1') by energy-rich j ets (2, 2') of a liquid or gaseous medium and in that case supported and guided by means of pulsed energy and the medium is conducted under pressure through feed channels (4) in the interior of transport and/or knife carrier drums (7, 8) to nozzles (5) at the peripheries thereof and flows out of these in front of and/or behind the carrier regions of the drums or as close as possible to the knives (6) of the knife drums (8) obliquely or at an approximately perpendicular angle relative to the metal sheet or strip (1) in a closed jet against this, wherein the medium flows out of nozzles (5), which are directed against the metal plate or metal sheet (1), at a confinable angular setting of a drum (7, 8) with use of a rotary slide valve (9) preferably arranged at an end face of a rotatable transport or knife carrier drum (7, 8).
In yet a further aspect, the present invention resides in a device for guiding and supporting a thin metal sheet or metal strip (1), comprising transport drums and/or knife carrier drums (7, 8) which have, at their periphery in axially parallel orientation, jets (5) which are arranged in at least row and which on loading with a medium point towards the upper and/or lower surface of the metal sheet or metal strip, wherein the jets (5) are connectible by feed channels (4), which extend in the interiors of the drums (7, 8) to sources (25), which are provided outside the drums, with connecting elements (21, 21') for medium feedable under pressure, wherein at least one pump (22) and at least one rotary slide valve (9) are arranged between the feed channels (4) of a drum (7, 8) and a source (25) for a medium feedable under pressure and the valve is preferably arranged at an end face of a drum (7, 8).
BRIEF DESCRIPTION OF THE DRAWINGS
Further details, features, and advantages of the invention result from the following explanation of several embodiments illustrated schematically in the drawings it is shown in:
Fig. 1 in a representation similar to a flow sheet a transport drum with supply channels and jet nozzles arranged therein, with a rotary valve at the end face, pressure pump, and media source;
Fig. 2 in a side view and partially in section, shearing-off shears with an arrangement of the jet nozzles according to the invention Fig. 3 in a side view a similar arrangement with chisel-type shears furnished according to the invention with jet nozzles;
Fig. 4 in a side view shears with stationary guide wedges arranged upstream and downstream and with jet nozzles arranged therein.
The purely schematic illustration of Fig. 1 shows supply channels 4 arranged in a transport drum 7 for supplying the jet nozzles 5 and 5' formed therein. Opposite the end face of the transport drum 7 a rotary valve 9 is arranged which is connected with a central bore 20 to a conveying line 23, extending from a pressure pump 22, for a liquid medium.
The rotary valve 9 is arranged so as to be non-rotatable while the transport drum 7 rotates relative thereto, when functioning as a transport drum 7 or blade drum 8, as is known, in the art.
Connecting channels 21, 21' beginning at the central bore 20 and having exit openings at the side facing the end face of the transport drum 7 are provided in the rotary valve 9.
Medium that is under pressure is released always when the openings of the supply channels 4 coincide with the oppositely oriented openings of the connecting channels 21 in the rotational direction to thus allow flow in a limited angular range. In other angular positions of the transport drum 7, the supply channels 4 of the transport drum 7 cannot be flushed with pressure medium. It is also possible to adjust different ejection widths with the jet nozzles.
Moreover, the pressure pump 22 with its motor 22' can be controlled via a signal and switching device, similar to the device illustrated i n Fig. 4, for example, according to the requirements of an incoming metal strip 1. The pressure pump 22 takes in a liquid medium from the medium source 25 through the intake line 24.
Fig. 2 shows as an example a blade carrier drum 8, 8' with a device for guiding and supporting a comparatively thin sheet metal or metal strip 1. The blade carrier drums are provided with blades 6 in a manner known in the art which interact with one another and cut the metal strip 1 in the cutting plane y-y when contacting one another.
The latter is transported on the rolling table 10 and during the cutting process is guided and stabilized from below or from below and from above by bundles of jets 2, 2' exiting from the jet nozzles 5. The jet nozzles 5, 5' are arranged such that they secure at both sides of the cutting plane y-y the strip 1 in the given position and, in particular, prevent a slanting out of the transport direction. Moreover, in regard to the shearing-off shears 13, same elements are identified with same reference numerals.
In Fig. 3 a similar arrangement is shown with the difference that the shears are chisel-type shears 3 with a cutting chisel 11 wherein a counter drum 8' is correlated with the blade drum 8 provided with the chisel. In this connection, it must be prevented that the strip 1 during cutting by the cutting chisel 11 is riveted to the smooth surface or adheres thereto because then the cut leading edge of the strip would be deformed. Accordingly, the blade drum 8 and, in particular, the anvil drum 8' are provided with supply channels 4 in the aforementioned axis-parallel arrangement which have jet nozzles from which jet bundles 2, 2' of a liquid medium exit and reliably prevent the leading edge of the strip that has been cut from being riveted to or adhering on the counter drum 8'.
Fig. 4 shows a further similar arrangement with chisel-type shears 3 in which between the shears and the rolling table 10 guide wedges 15 are arranged. They have jet nozzles 5 for medium-loaded supply, channels 4 which are connected to medium supply lines 29 having a pressure pump 27 arranged therein. Above the sheet metal or metal strip 1 a signaling device 19 monitoring the introduction of the strip at the strip head 16 is provided, wherein the signaling device is in communication via a signal line 26 with the motor 28 of the pressure pump. The pressure pump is supplied with the 1 i q a i d medium in a manner known in the art from the medium source 25 by means of a suction line. The passage of the strip head 16 of the metal strip 1 is detected by the signaling device 19 which then activates via the signal line 26 the switch for the motor 28 and thus starts the pressure pump 27. The latter conveys the pressure medium through the supply line 29 via the supply channels 4 to the jet nozzles 5. The principle holds true for all jet nozzles, also those in the drums. A signaling device must detected the strip head and the cut. The jet nozzles are then loaded only briefly at the strip head and the cut. The signal can also be used by a device which is already present anyway.
Moreover, the chisel drum of the chisel-type shears 3 is in communication via the rotary valve 9 (not shown in Fig. 4) with this supply channel 4' and the jet nozzles 5' such that a bundled medium jet 2' exits with high energy from below against the metal strip 1 in the area of the strip head 16 and prevents that the comparatively thin and bendable strip 1 bends downwardly and impacts against the guide wedge 15' to the right and is thereby deformed.
Only during the further course of the strip transport, after a certain amount of time or a measured advancing of the metal strip 1, the chisel-type shears 3 are activated and a predetermined length of strip is cut off, wherein the supply channels 4 " of the, chisel drum and the counter drum previously unused cooperate with the rotary valve 9 take over the guiding of the strip 1 by means of energy-rich media jets.
Claims (20)
1. A method for guiding and supporting a comparatively thin sheet metal or metal strip (1) during transport across a conveying device (10), such as a rolling table, and/or during, before or after a cutting process when passing through shears (3), wherein the sheet metal or strip (1) is loaded at least from its underside (1') with energy-rich jet bundles (2, 2') of a liquid or gaseous medium and is thus supported and guided by means of impulse energy, and wherein the medium is guided under pressure through supply channels (4) in the interior of the transport and/or blade carrier drums (7, 8) to jet nozzles (5) at their peripheries and exits as a closed jet (2) from them before and/or behind the support areas of the drums or as closely as possible adjacent to the blades (6) of the blade drum (8) against the sheet metal or strip (1) at a slant or at a substantially perpendicular angle relative to the sheet metal or strip (1), characterized in that the medium flows out of the jet nozzles (5) oriented against the sheet metal or metal strip (1) in a limitable angular position of a drum (7, 8) by employing a rotary valve (9), preferably arranged at an end face of a rotatable transport or blade carrier drum (7, 8).
2. A method according to claim 1, characterized in that the signaling device detects the strip head or the strip cut and the jet nozzles (5) at the strip head or strip cut are then loaded only briefly with medium.
3. A method according to claim 1 or claim 2, characterized in that in the case of transport drums of a rolling table the jet nozzles during the respective pass of the strip head are briefly successively loaded with medium.
4. A method according to any one of claims 1 to 3, characterized in that in the case of chisel-type shears, comprising an upper or lower drum (8) provided with a cutting chisel (11) and a counter drum (8') formed as an anvil, the sheet metal or strip (1) to be cut is loaded with at least one medium jet (2, 2') out of each of the drums (8, 8'), preferably before and/or behind the cutting plane (y-y), from above and/or from below.
5. A method according to any one of the claims 1 to 3, characterized in that in the case of shearing-off shears (13), comprising a blade drum (8, 8') each with a blade (6,6') having oppositely positioned edges, the sheet metal or strip (1) to be separated is loaded, respectively, before and/or behind the cutting plane (y-y) with a supporting medium jet or several such medium jets (2,2') from above and/or from below.
6. A method according to any one of claims 1 to 4, characterized in that upon advancing of the sheet metal or strip (1), in particular, during introduction of its head (16) into the chisel-type shears (3), the entry of the head (16) in the area of the guide wedge (15) arranged stationarily upstream of the chisel-type shears (3) as well as its advancing speed are determined by a signaling device (19) and the head (16) is loaded and guided by at least one row of medium jets (2, 2') exiting from the guide wedge (15) from below approximately perpendicularly against the sheet metal or strip (1).
7. A device for guiding and supporting a thin sheet metal or metal strip (1), in particular, for performing the method according to the invention, comprising transport drums and/or blade carrier drums (7, 8), wherein the drums at their periphery have jet nozzles (5) arranged in axis-parallel alignment in at least one row which, upon loading with a medium, are oriented against the top surface and/or bottom surface of the sheet metal or the metal strip, wherein the jet nozzles (5) are connectable, starting at supply channels (4) extending in the interior of the drums (7, 8), with sources (25) provided external to the drums (7, 8) with connecting members (21, 21') for a medium that can be supplied under pressure, characterized in that at least one pump (22) and at least one rotary valve (9) are arranged between the supply channels (4) of a drum (7, 8) and a source (25) for a medium that can be supplied under pressure, wherein the rotary valve is arranged preferably at an end face of a drum (7, 8).
8. A device according to claim 7, wherein between the chisel-type shears (3) and the rolling table (10) guide wedges (15) are arranged, characterized in that the guide wedges (15) comprise jet nozzles (5) on supply channels (4) provided for a medium, and that they are connected to media supply lines (29) with a pressure pump (27) arranged therein and a media source (25), and that above the sheet metal or strip (1) a signaling device (19) monitoring the entry of the strip is arranged which is in communication with the motor (28) of the pump (27) via a control signal line (26).
9. A device according to claim 8, characterized in that the jet width of the jet nozzles (5) is adjustable.
10. A device according to any one of claims 7 to 9, characterized in that in the case of transport drums of a rolling table the jet nozzles are distributed radially on the periphery of the drum.
11. Method of guiding and supporting a comparatively thin metal sheet or metal strip (1) during transport by way of a conveying device (10) such as a roller path, and/or during, before or after a separating process on running through a cutter (3), wherein the metal sheet or strip (1) is acted on at least from its underside (1') by energy-rich jets (2, 2') of a liquid or gaseous medium and in that case supported and guided by means of pulsed energy and the medium is conducted under pressure through feed channels (4) in the interior of transport and/or knife carrier drums (7, 8) to nozzles (5) at the peripheries thereof and flows out of these in front of and/or behind the carrier regions of the drums or as close as possible to the knives (6) of the knife drums (8) obliquely or at an approximately perpendicular angle relative to the metal sheet or strip (1) in a closed jet against this, wherein the medium flows out of nozzles (5), which are directed against the metal plate or metal sheet (1), at a confinable angular setting of a drum (7, 8) with use of a rotary slide valve (9) preferably arranged at an end face of a rotatable transport or knife carrier drum (7, 8).
12. Method according to claim 11, wherein a signal device detects the strip head or strip cut and the jets (5) are then acted on at the strip head or strip cut by medium only briefly.
13. Method according to claim 11 or claim 12, wherein in the case of transport drums of a roller path the nozzles are acted on by medium briefly in succession during the respective transit of the strip head.
14. Method according to any one of claims 11 to 13, wherein in the case of the a chisel cutter, comprising a lower or an upper drum (8) equipped with a separating chisel (11) and a counter-drum (8') constructed as an anvil, the metal sheet or strip (1) to be separated is acted on from above and/or below by at least one jet (2, 2') of medium from each of the dorms (8, 8') preferably in front of and/or behind the separating plane (y-y).
15. Method according to any one of claims 10 to 13, wherein in the case of a shearing cutter (13), comprising knife drums (8, 8') with respective knives (6, 6") having opposed cutting edges, the metal sheet or strip (1) is acted on from above and/or below respectively in front of and/or behind the separating plane (y-y) by a supporting jet of medium or a plurality of such jets (2, 2') of medium.
16. Method according to any one of claims 10 to 14, wherein on advance of metal sheet or strip (1), particularly on introduction of the head (16) thereof into the chisel cutter (3), the entry of the head (16) into the region of a stationary guide wedge arranged upstream of the chisel cutter (3) as well as its speed of advance is ascertained by a signal device (19) and the head (16) is acted on and guided by a series of jets (2, 2') of medium issuing from the guide wedge (15) from below approximately perpendicularly against the metal sheet or strip (1).
17. Device for guiding and supporting a thin metal sheet or metal strip (1), comprising transport drums and/or knife carrier drums (7, 8) which have, at their periphery in axially parallel orientation, jets (5) which are arranged in at least row and which on loading with a medium point towards the upper and/or lower surface of the metal sheet or metal strip, wherein the jets (5) are connectible by feed channels (4), which extend in the interiors of the drums (7, 8) to sources (25), which are provided outside the drums, with connecting elements (21, 21') for medium feedable under pressure, wherein at least one pump (22) and at least one rotary slide valve (9) are arranged between the feed channels (4) of a drum (7, 8) and a source (25) for a medium feedable under pressure and the valve is preferably arranged at an end face of a drum (7, 8).
18. Device according to claim 17, wherein guide wedges (15) are arranged between the chisel cutter (3) and the roller path (10), wherein the guide wedges (15) having nozzles (5) at feed channels (4) equipped for medium and that these are connected to medium feed ducts (29) with a pressure pump (27) arranged therein and source (25) of medium and that arranged above the metal sheet or plate (1) is a signal device (19) which monitors the strip entry and which is connected with the motor (28) of the pump (27) by way of control signal line (26).
19. Device according to claim 18, wherein the jet width of the nozzles (5) is adjustable.
20. Device according to any one of claims 17 to 19, wherein in the case of transport drums of roller path the nozzles are arranged to be radially distributed at the circumference of the drum.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19832925.3 | 1998-07-22 | ||
| DE19832925A DE19832925A1 (en) | 1998-07-22 | 1998-07-22 | Supporting and guiding thin metal sheet on conveyor before, during or after cutting, using arrangement of high power liquid or gas jets to impinge against underside of sheet |
| PCT/EP1999/005116 WO2000005020A1 (en) | 1998-07-22 | 1999-07-17 | Method and device for guiding and supporting a thin sheet or metal strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2338217A1 CA2338217A1 (en) | 2000-02-03 |
| CA2338217C true CA2338217C (en) | 2007-04-24 |
Family
ID=7874892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002338217A Expired - Fee Related CA2338217C (en) | 1998-07-22 | 1999-07-17 | Method and device for guiding and supporting a thin sheet or metal strip |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP1098728B1 (en) |
| JP (1) | JP4489950B2 (en) |
| KR (1) | KR100580270B1 (en) |
| CN (1) | CN1142840C (en) |
| AT (1) | ATE213679T1 (en) |
| BR (1) | BR9912274A (en) |
| CA (1) | CA2338217C (en) |
| DE (2) | DE19832925A1 (en) |
| ES (1) | ES2173755T3 (en) |
| MX (1) | MXPA01000772A (en) |
| MY (1) | MY119757A (en) |
| RU (1) | RU2226456C2 (en) |
| TW (1) | TW407072B (en) |
| WO (1) | WO2000005020A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT520462A1 (en) * | 2017-09-15 | 2019-04-15 | Andritz Ag Maschf | Method for cross-cutting a material web moved along a direction of movement, and device for this purpose |
| CN113857552A (en) * | 2021-10-15 | 2021-12-31 | 四川德胜集团钒钛有限公司 | Flying shear |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE944919C (en) * | 1953-01-17 | 1956-06-28 | Jagenberg Werke Ag | Cross cutter for cutting running material, in particular paper webs by means of rotating knife rollers |
| DE1427231A1 (en) | 1960-07-28 | 1969-02-13 | Schloemann Ag | Device for feeding material to be cut to scissors and for dividing sheet metal sections into partial lengths |
| US3143016A (en) * | 1960-12-28 | 1964-08-04 | West Virginia Pulp & Paper Co | Webcutting mechanism with forced air work and product transfer means |
| JPH0780088B2 (en) * | 1990-07-30 | 1995-08-30 | 川崎製鉄株式会社 | High speed cutting machine with fluid header |
| US5140880A (en) * | 1991-05-08 | 1992-08-25 | Littleton Industrial Consultants, Inc. | Push-pull apparatus and method for web cutting and trim strip removal |
-
1998
- 1998-07-22 DE DE19832925A patent/DE19832925A1/en not_active Withdrawn
-
1999
- 1999-07-07 MY MYPI99002851A patent/MY119757A/en unknown
- 1999-07-17 JP JP2000560999A patent/JP4489950B2/en not_active Expired - Fee Related
- 1999-07-17 ES ES99941440T patent/ES2173755T3/en not_active Expired - Lifetime
- 1999-07-17 KR KR1020017000773A patent/KR100580270B1/en not_active IP Right Cessation
- 1999-07-17 RU RU2001105089/02A patent/RU2226456C2/en not_active IP Right Cessation
- 1999-07-17 WO PCT/EP1999/005116 patent/WO2000005020A1/en active IP Right Grant
- 1999-07-17 AT AT99941440T patent/ATE213679T1/en not_active IP Right Cessation
- 1999-07-17 CA CA002338217A patent/CA2338217C/en not_active Expired - Fee Related
- 1999-07-17 EP EP99941440A patent/EP1098728B1/en not_active Expired - Lifetime
- 1999-07-17 DE DE59900907T patent/DE59900907D1/en not_active Expired - Fee Related
- 1999-07-17 MX MXPA01000772A patent/MXPA01000772A/en unknown
- 1999-07-17 BR BR9912274-0A patent/BR9912274A/en not_active IP Right Cessation
- 1999-07-17 CN CNB998104744A patent/CN1142840C/en not_active Expired - Fee Related
- 1999-07-20 TW TW088112286A patent/TW407072B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2338217A1 (en) | 2000-02-03 |
| DE19832925A1 (en) | 2000-01-27 |
| EP1098728A1 (en) | 2001-05-16 |
| MXPA01000772A (en) | 2002-05-14 |
| ES2173755T3 (en) | 2002-10-16 |
| DE59900907D1 (en) | 2002-04-04 |
| TW407072B (en) | 2000-10-01 |
| KR100580270B1 (en) | 2006-05-16 |
| WO2000005020A1 (en) | 2000-02-03 |
| ATE213679T1 (en) | 2002-03-15 |
| MY119757A (en) | 2005-07-29 |
| RU2226456C2 (en) | 2004-04-10 |
| BR9912274A (en) | 2001-11-06 |
| JP4489950B2 (en) | 2010-06-23 |
| EP1098728B1 (en) | 2002-02-27 |
| CN1315893A (en) | 2001-10-03 |
| KR20010053566A (en) | 2001-06-25 |
| CN1142840C (en) | 2004-03-24 |
| JP2002521212A (en) | 2002-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |