WO1996014175A1 - Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter - Google Patents
Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter Download PDFInfo
- Publication number
- WO1996014175A1 WO1996014175A1 PCT/IT1994/000205 IT9400205W WO9614175A1 WO 1996014175 A1 WO1996014175 A1 WO 1996014175A1 IT 9400205 W IT9400205 W IT 9400205W WO 9614175 A1 WO9614175 A1 WO 9614175A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rollers
- diameters
- band
- flattening
- operative
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
Definitions
- the invention concerns machines used for unfinished or finished metal products to eliminate the effects of bending and warping generally that occur after ap ⁇ plication of mechanical processes or heat treatment.
- the distorsion that is commonly produced in unfinished products arises during the cooling stage that follows the rolling process and causes bending in the plane perpendicular to that to which the minimum moment of inertia in the unfinished product corresponds.
- the internal stresses present in laminated metal bands usually originate in some irregularity in the mechani- cal characteristics of the rolling operation. During subsequent processes such as shearing, cutting and others, these internal tensions cause warping and in particular a lack of flatness.
- levellers To achieve flatness all the metal fibres must be of the same length, creating new internal stresses which act against and can overcome the existing ones.
- machines known as levellers are used.
- the levellers for metal bands and long sheets operate by means of a continuous process using transversal rol ⁇ lers which make high working speeds possible.
- Cold levelling can with advantage be obtained by apply- ing appropriate traction to the material in a process called stretching.
- T is machine comprises a tightening device at the entry, a group of rollers for stretching to yield point, a group for straightening, another group for flattening and a tightening device at the exit.
- Tension is set up by the tightening devices at entry and exit, and these keep the band at a constant previously set tension while it is passing through the machine.
- Function of the first group is to stretch the material evenly to yield point.
- Function of the straightener is to straighten the band that leaves the stretching rollers in a very warped con- dition .
- the operative rollers used for stretching , straighten- ing and flattening are drawn along by passage of the band which produces friction and so moves the rollers.
- the operative rollers in turn transmit movement to the supporting rollers whose function is to sustain the operative rollers and prevent any excessive bending.
- the operative rollers have a constant diameter and their contact with the band is assured by movement of the lower bed that rises up to the desired position; said lower bed can also be in ⁇ clined in the direction of band movement in relation to the upper bed .
- Flatness is achieved by adjusting the length of time when the band is in contact with the flattening roller. For a certain band speed this time is obviously a func ⁇ tion of the position of operative rollers supported by the lower bed in relation to the operative rollers supported by the upper bed. The more closely the lower bed approaches the upper one the greater will be the fraction of band that is made to surround, one by one, the upper and lower rollers wa ⁇ ving in one direction and in the opposite one. Since the diameter of these rollers is constant, it is impossible to adjust the time variable independently of the length of band that passes round each roller.
- the fraction of band round the rollers must be increased while the radius of curvature of the various waves of band obvioualy remains unchanged Further, adjustment of the machine is left to the dis ⁇ cretion of the operator and is limited by the time of bending. When flattening speed is high, band stretching times are therefore short and stretching is not uniform.
- Subject of the invention is a flattening unit for level ⁇ ling machines with two opposing beds that support cylin ⁇ drical idling operative rollers between which passes the band to be flattened.
- Diameters of the rollers of one bed or of both differ. It is an advantage if the diameters of the rollers in ⁇ crease in relation to the direction of movement of the band to be flattened while being aligned so as to lie externally tangential to the geometrical plane.
- the increase in diameters of the aligned rollers is con- stant and said rollers are therefore externally and in ⁇ ternally tangential to the two angular geometrical planes
- the diameter of the last roller, in the direction of band movement is considerably larger than that of the others that precede it.
- the diameters of the rollers of both op ⁇ posing beds are subs antially equal, or the diameters of rollers on the lower bed can be larger than those of the opposite rollers on the upper bed.
- diameters of all the operative rol- lers should be considerably larger than those of the ope ⁇ rative rollers on flattening machines at present in use. Distances between the various rollers of increasing dia ⁇ meter are determined according to said diameters and to the characteristics of the bands to be flattened.
- rollers whose diameters increase in the direction of the band's forward movement, residual stresses in the band are eased by progressive reduction of curvature so that its configuration approaches the one to be ultimately obtained.
- variable constituted by band-roller contact a new one is therefore added, a variable that can be de ⁇ termined with precision and does not depend on the ope- rator's decision.
- Fig.4 A levelling machine with a set of the flattening rollers subject of the invention.
- Fig.5 A new set of flattening rollers.
- Fig.6 Diagram to show action on a band of a set of the invented flattening rollers.
- the machine 10 substantially consists of the following roller groupings: those to produce tension comprising a tightener 11 at the entry and another tightener 15 at the exit, rollers for stretching to yield point 12, rollers for s raightening 13 and those for flattening 14;
- the tightener units at entry 11 and at the exit 15 keep the band 25 at a certain constant tension for the whole time it is passing through the machine.
- Function of the stretching group 12 is to stretch the material uniformly to yield point, and this group com ⁇ prises the beds 30 and 31 with their operative rollers 32 and 33 and supporting rollers 34 and 35.
- the straightener group 13 comprises the beds 40 and 4 I with operative rollers 42 and 43 and supporting rollers 44.
- the function of these rollers is to straighten the band, which is highly warped when it emerges from the stretching rollers and which has a bend turned backwards towards the last stretching roller, to establish the curve, and reduce internal stresses caused by stretching.
- the flattening group 14 removes residual stresses so as to produce a band free from stress and perfectly flat even after cutting.
- the operative rollers in the stretching, straightening and flattening groups are put in motion by friction from the band passing through them.
- the flattening group 14 is formed of a lower bed 16 and an upper one 17.
- the lower bed comprises a set of operative rollers 52 and a set of supporting rollers 54.
- the upper bed comprises a set of operative rollers 53 and a set of supporting rollers 55. Diameter is constant for the operative rollers 52 and 53 on both beds. Contact between the operative rollers 52, 53 and the band 2 is assured by movement of the lower bed 16 towards the upper bed 17.
- the lower bed 16 is also inclinable in the forward direc ⁇ tion of the band 25 in relation to the upper bed 17.
- diameters are constant for the two sets of operative rollers 52 and 53 in the flattening group.
- Fig. 3 gives a diagrammatic illustration of the action of rollers 52 and 53 on the band 25.
- the length (t) of the arc of contact between rollers and band depends both on the diameter (D) of the rollers and on the distance (d) between the set of rollers 52 on the lowe ⁇ bed 16 and the set of rollers 53 on the upper bed 17.
- the length (t) of the arc corresponds to a certain period of contact between band and rollers.
- the flattening group of rollers 14 in Figures 1 and 2 is replaced by the group 18 shown in Figures 4 and 5.
- the flattening group 18 comprises a lower bed 19 and an upper one 20.
- the lower bed 19 com ⁇ prises a set of operative rollers 60-64 whose diameter in ⁇ creases in the forward direction of the band 25.
- Diameter increase is constant as seen by the geometrical planes indicated by broken lines ( ⁇ ) and ⁇ ) in Fig. 5 that form lower and upper tangents to .said set of rollers.
- the diameter of the end roller 65 i appreciably larger than those of the preceding rollers, it is equally tangential to the plane (- ⁇ ) indicated above.
- Said operative rollers are governed by the supporting rol ⁇ lers 66 whose diameter is constant.
- the diameters of the operative rollers 70-73 on the upper bed 20 increase in the same way, this increase being constant as shown by the broken lines (o) and (d) on the geometrical planes tangential to said rollers.
- the diameter of the end roller 74 is much larger but said roller is similarly tangential to the broken line
- Said operative rollers 70-74 are governed by the set of supporting rollers 75 of equal diameter.
- the diameters of the operative rollers on the lower bed are slightly larger than those of the corresponding op ⁇ erative rollers on the upper bed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Drying Of Solid Materials (AREA)
- Electrolytic Production Of Metals (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Metal Rolling (AREA)
- Coating With Molten Metal (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69429880T DE69429880T2 (en) | 1994-11-08 | 1994-12-05 | LEADER GROUP IN SHEET STRETCH-LEVELERS WITH WORKING ROLES OF INCREASING DIAMETER |
US08/831,620 US5855132A (en) | 1994-11-08 | 1994-12-05 | Flattening group in levelling machines kept under tension for metal bands with operative rollers of increasing diameter |
AU12791/95A AU1279195A (en) | 1994-11-08 | 1994-12-05 | Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter |
AT95903900T ATE213182T1 (en) | 1994-11-08 | 1994-12-05 | LEVELING GROUP IN METAL STRAP STRETCH STRAIGHTENING MACHINES WITH WORK ROLLERS OF INCREASING DIAMETER |
JP8515184A JPH10508539A (en) | 1994-11-08 | 1994-12-05 | In a leveling machine for metal bands, a group of flattening rollers, which are provided under tension, with a number of working rollers of successively increasing diameter. |
EP95903900A EP0790870B1 (en) | 1994-11-08 | 1994-12-05 | Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI942259A IT1271710B (en) | 1994-11-08 | 1994-11-08 | FLUSHING UNIT FOR DRYING MACHINES, UNDER VOLTAGE, FOR METAL TAPES, WITH WORKING ROLLS WITH INCREASING DIAMETER |
ITMI94A002259 | 1994-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996014175A1 true WO1996014175A1 (en) | 1996-05-17 |
Family
ID=11369815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT1994/000205 WO1996014175A1 (en) | 1994-11-08 | 1994-12-05 | Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter |
Country Status (9)
Country | Link |
---|---|
US (1) | US5855132A (en) |
EP (1) | EP0790870B1 (en) |
JP (1) | JPH10508539A (en) |
AT (1) | ATE213182T1 (en) |
AU (1) | AU1279195A (en) |
DE (1) | DE69429880T2 (en) |
ES (1) | ES2171526T3 (en) |
IT (1) | IT1271710B (en) |
WO (1) | WO1996014175A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2666560A1 (en) * | 2013-08-21 | 2013-11-27 | Burghardt + Schmidt GmbH | Straightening machine with adjustable support roll mounts |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3318713B1 (en) | 2007-11-13 | 2022-09-21 | Guardian Glass, LLC | Box spacer with sidewalls |
US9309714B2 (en) | 2007-11-13 | 2016-04-12 | Guardian Ig, Llc | Rotating spacer applicator for window assembly |
US8967219B2 (en) | 2010-06-10 | 2015-03-03 | Guardian Ig, Llc | Window spacer applicator |
DE102008024013B3 (en) * | 2008-05-16 | 2009-08-20 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Method and device for straightening a metal strip |
US20100162784A1 (en) * | 2008-12-31 | 2010-07-01 | Buta John R | Flattening device |
WO2011008860A1 (en) * | 2009-07-14 | 2011-01-20 | Infinite Edge Technologies, Llc | Stretched strips for spacer and sealed unit |
US9228389B2 (en) | 2010-12-17 | 2016-01-05 | Guardian Ig, Llc | Triple pane window spacer, window assembly and methods for manufacturing same |
ITMI20120271A1 (en) * | 2012-02-23 | 2013-08-24 | Selema Srl | ROLLER OF DETECTION OF THE DIFFERENCE OF TENSION IN A PLURALITY OF TRANSVERSAL PORTIONS OF A METAL TAPE. |
US9689196B2 (en) | 2012-10-22 | 2017-06-27 | Guardian Ig, Llc | Assembly equipment line and method for windows |
US9260907B2 (en) | 2012-10-22 | 2016-02-16 | Guardian Ig, Llc | Triple pane window spacer having a sunken intermediate pane |
US9486850B2 (en) * | 2012-12-07 | 2016-11-08 | Butech Bliss | Roller leveler |
DE102013106243C5 (en) * | 2013-06-14 | 2018-10-04 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Method and device for stretch bending of metal strips |
CN103406392A (en) * | 2013-08-05 | 2013-11-27 | 太仓市旭冉机械有限公司 | Automatic steel-plate leveller |
DE102015216387A1 (en) * | 2015-08-27 | 2017-03-02 | Sms Group Gmbh | Straightening machine with modular exchangeable cassette system |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260093A (en) * | 1964-04-01 | 1966-07-12 | Natalis H Polakowski | Strip flattening device |
EP0040568A1 (en) * | 1980-05-16 | 1981-11-25 | Clecim Sa | Apparatus for improving the superficial aspect of rolled and tempered steel plate |
JPS60221126A (en) * | 1985-04-01 | 1985-11-05 | Mitsubishi Heavy Ind Ltd | Device for leveling strip |
JPS61245917A (en) * | 1985-04-24 | 1986-11-01 | Mitsubishi Heavy Ind Ltd | Roller leveller |
JPS6238721A (en) * | 1985-08-14 | 1987-02-19 | Hitachi Ltd | Leveler for plate |
JPH01241325A (en) * | 1988-03-24 | 1989-09-26 | Nippon Steel Corp | Method and apparatus for correcting shape |
US5329798A (en) * | 1989-09-18 | 1994-07-19 | Hitachi, Ltd. | Leveling device and leveling method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB548639A (en) * | 1941-10-28 | 1942-10-19 | Norton Co Ltd Sir James Farmer | Improvements in machines for flattening or straightening of metal strips and like metal sections |
US2386533A (en) * | 1941-11-27 | 1945-10-09 | Bertha L Yoder | Uncoiling mechanism |
US5097691A (en) * | 1991-01-28 | 1992-03-24 | Braner, Inc. | Adjustable leveler |
-
1994
- 1994-11-08 IT ITMI942259A patent/IT1271710B/en active IP Right Grant
- 1994-12-05 DE DE69429880T patent/DE69429880T2/en not_active Expired - Fee Related
- 1994-12-05 EP EP95903900A patent/EP0790870B1/en not_active Expired - Lifetime
- 1994-12-05 US US08/831,620 patent/US5855132A/en not_active Expired - Fee Related
- 1994-12-05 JP JP8515184A patent/JPH10508539A/en active Pending
- 1994-12-05 WO PCT/IT1994/000205 patent/WO1996014175A1/en active IP Right Grant
- 1994-12-05 AU AU12791/95A patent/AU1279195A/en not_active Abandoned
- 1994-12-05 ES ES95903900T patent/ES2171526T3/en not_active Expired - Lifetime
- 1994-12-05 AT AT95903900T patent/ATE213182T1/en not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260093A (en) * | 1964-04-01 | 1966-07-12 | Natalis H Polakowski | Strip flattening device |
EP0040568A1 (en) * | 1980-05-16 | 1981-11-25 | Clecim Sa | Apparatus for improving the superficial aspect of rolled and tempered steel plate |
JPS60221126A (en) * | 1985-04-01 | 1985-11-05 | Mitsubishi Heavy Ind Ltd | Device for leveling strip |
JPS61245917A (en) * | 1985-04-24 | 1986-11-01 | Mitsubishi Heavy Ind Ltd | Roller leveller |
JPS6238721A (en) * | 1985-08-14 | 1987-02-19 | Hitachi Ltd | Leveler for plate |
JPH01241325A (en) * | 1988-03-24 | 1989-09-26 | Nippon Steel Corp | Method and apparatus for correcting shape |
US5329798A (en) * | 1989-09-18 | 1994-07-19 | Hitachi, Ltd. | Leveling device and leveling method |
Non-Patent Citations (4)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 10, no. 81 (M - 465)<2138> 29 March 1986 (1986-03-29) * |
PATENT ABSTRACTS OF JAPAN vol. 11, no. 221 (M - 608) 17 July 1987 (1987-07-17) * |
PATENT ABSTRACTS OF JAPAN vol. 11, no. 94 (M - 574) 25 March 1987 (1987-03-25) * |
PATENT ABSTRACTS OF JAPAN vol. 13, no. 577 (M - 910) 20 December 1989 (1989-12-20) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2666560A1 (en) * | 2013-08-21 | 2013-11-27 | Burghardt + Schmidt GmbH | Straightening machine with adjustable support roll mounts |
Also Published As
Publication number | Publication date |
---|---|
DE69429880D1 (en) | 2002-03-21 |
IT1271710B (en) | 1997-06-04 |
US5855132A (en) | 1999-01-05 |
JPH10508539A (en) | 1998-08-25 |
EP0790870B1 (en) | 2002-02-13 |
ITMI942259A0 (en) | 1994-11-08 |
ES2171526T3 (en) | 2002-09-16 |
DE69429880T2 (en) | 2002-11-28 |
ATE213182T1 (en) | 2002-02-15 |
EP0790870A1 (en) | 1997-08-27 |
ITMI942259A1 (en) | 1996-05-08 |
AU1279195A (en) | 1996-05-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1996014175A1 (en) | Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter | |
US3326026A (en) | Metal sheet and strip flattening apparatus | |
US2194212A (en) | Tension rolling method and apparatus therefor | |
US2655194A (en) | Apparatus for processing round bars and tubes | |
US3427848A (en) | Devices for cold-rolling and planishing metal sheet | |
US2391499A (en) | Process of and apparatus for operating on sheet metal | |
US3282304A (en) | Wire uncoiling device | |
US3196656A (en) | Wire conditioning apparatus | |
US3834202A (en) | Metal strip straightening machine | |
US4173235A (en) | Method and apparatus for forming wire to noncircular cross sections | |
US5138860A (en) | Combined assembly to straighten and linearize bars or rods | |
US3559431A (en) | Apparatus for stretching continuous bands | |
US3685330A (en) | Method of and apparatus for helically coiling pipe | |
US3527078A (en) | Strip flattening | |
US3328992A (en) | Method of and apparatus for obtaining flat metallic strip | |
US3074465A (en) | Machine for the fabrication of spiral tube coils | |
US4527723A (en) | Chain bridle equipment for keeping metal strip tensions at a constant level | |
US5161400A (en) | Process for levelling continuously moving metal strips | |
US4353237A (en) | Method of rolling strip | |
US2136714A (en) | Mechanism for straightening wire | |
JPH0866716A (en) | Device for elongation of at least two wire materialsor roundbars to same length in combination with extraction device | |
US3270543A (en) | Machine for flattening and curling of metal strip | |
US3389591A (en) | Bridle | |
SU1816669A1 (en) | Knurling roller | |
US3128961A (en) | wickwire |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): KE MW SD SZ AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1995903900 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08831620 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1995903900 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWG | Wipo information: grant in national office |
Ref document number: 1995903900 Country of ref document: EP |