US3815401A - Housing construction for cluster type cold rolling mills - Google Patents

Housing construction for cluster type cold rolling mills Download PDF

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Publication number
US3815401A
US3815401A US00329364A US32936473A US3815401A US 3815401 A US3815401 A US 3815401A US 00329364 A US00329364 A US 00329364A US 32936473 A US32936473 A US 32936473A US 3815401 A US3815401 A US 3815401A
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United States
Prior art keywords
housing
slab
work rolls
casters
rolls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00329364A
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English (en)
Inventor
T Sendzimir
J Turley
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T Sendzimir Inc
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T Sendzimir Inc
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Publication date
Application filed by T Sendzimir Inc filed Critical T Sendzimir Inc
Priority to US00329364A priority Critical patent/US3815401A/en
Priority to CA190,489A priority patent/CA998263A/en
Priority to IT47918/74A priority patent/IT1002762B/it
Priority to FR7403559A priority patent/FR2216032B1/fr
Priority to GB401774A priority patent/GB1445922A/en
Priority to ZA740649A priority patent/ZA74649B/xx
Priority to JP1484574A priority patent/JPS5334583B2/ja
Priority to DE2405518A priority patent/DE2405518C2/de
Application granted granted Critical
Publication of US3815401A publication Critical patent/US3815401A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls

Definitions

  • ABSTRACT A housing for cold rolling mills of the cluster type.
  • the housing comprises two heavy side frames, and upper and lower transverse slabs which serve to back the casters of the mill, and thus the intermediate roll and the workrolls.
  • the transverse slabs are oppositely tapered from the middle, being thickest at the center and becoming thinner toward both the front and rear sides of the mill, whereby the combined effect of the side frame deflection and slab deflections measured at the workroll is substantially constant along the entire operating length of the workroll.
  • the result is a housing wherein metal may be rolled with zero crown.
  • FIG. 6 A- PASS LINE PRIOR ART SENDZIMIR MILL HOUSI'NG PATENTEDJUII 1 I I974 sum 3' or 4 FIGS REAR sme. (DRIVE. SIDE) ENTRY RIP CENTERL EXIT S ⁇ OE I I I FRONT filDg (OPERATOR') mpg W FIG. 6
  • This invention relates to cold rolling cluster mills of the general type shown in Sendzimir United States Letters Pat. Nos. 2,169,711; 2,187,250 and 2,776,586.
  • the object of this invention is to provide improvements in the construction of such mills, with the objective of improving the shape or flatness of the work piece.
  • Conventional cold rolling mills for example those of the two high variety, are constructed so that the roll separating forces acting on the bodies of the rolls are reacted at the roll ends.
  • the curvature of the rolls resulting from this type of loading causes a non-uniform distribution of roll separating force, and non-uniform elongation of the strip, so that strip emerging from the mill has edges which are over-rolled and thus buckle when the strip is laid upon a flat horizontal surface in a tension free condition.
  • the four high mill offers some improvement over the two high mill by using a smaller work roll, which gives a smaller roll separating force,'and a larger back-up roll which provides a stiffer roll, which therefore deflects with less curvature.
  • the Sendzimir cluster mills as described in the aforesaid Letters Patent offer further improvement in this respect, as in this type of mill very small work rolls are used and also the backing rolls are themselves supported essentially across their whole faces by the mill housing.
  • the housing itself deflects under the action of the roll separating forces, thus leading to over-rolling of the strip edges, but because the housing can be made far stiffer than the back-up rolls of conventional mills, the effect is generally smaller than on conventional mills.
  • the subject of the present invention is a housing design for mills of the general type described in the aforesaid Letters Patent, which will deflect uniformly across the whole width of the strip being rolled, thus producing zero curvature, or zero crown, and therefore no tendency to over-roll the strip edges. This condition of zero crown is achieved regardless of the magnitude of the roll separating force.
  • FIG. 1 is a plan view of a conventional cluster mill housing according to the prior art.
  • FIG. 2 is a front elevational view thereof.
  • FIG. 3 is a side elevational view thereof.
  • FIG. 4 is a diagram to assist in an understanding of the present invention.
  • FIG. 5 is a plan view of an approximation of the form of housing used for purposes of calculation.
  • FIG. 6 is a front elevational view thereof.
  • FIG. 7 is a side elevational view thereof.
  • FIG. 8 is a diagram showing the loading configuration for a transverse slab when viewed from the front of the housing.
  • FIG. 9 is a view similar to FIG. 7 showing the loading configuration for the side frame.
  • FIG. 10 is an isometric view of a housing according to the present invention.
  • FIG. 11 is an isometric diagram showing the deflection curves for the housing of FIG. 10 and showing the resultant zero crown.
  • FIGS. 1, '2 and 3 show a housing for cluster mills as disclosed in the above mentioned Sendzimir patent, is for comparison with FIG. 10 showing a housing according to the present invention.
  • FIGS. 5, 6 and 7 show respectively a plan, front elevation and side elevation of such a housing.
  • the housing consists essentially of two side frames Iv which are linked at the top and bottom by the tapered slabs 4 and 5, respectively.
  • the structure is symmetrical in all planes which pass through its geometric center.
  • Each of the side frames through which the strip passes during roll ing consists of two columns 2 and two horizontal beams 3. These may of course be integral and have been so shown in FIG. 7.
  • the housing structure is loaded by forces P produced by the inner backing bearings and by forces P produced by the outer backing bearings. Theseforces are indicated by arrows in FIG. 6.
  • The'slabs 4 and 5 may each be considered to'behave as two cantilevers and each cantilever is loaded as shown in the diagram of FIG. 8 wherein 6 represents a cantilever (one-half of the slab 4).
  • each cantilever is supported by the side frame at a point C and this side frame provides all the vertical reactions to the forces P and P
  • the horizontal reaction is provided by a force H which is developed at the center of the slab D and a fixed end moment M is developed at D by the slab.
  • the moment developed at C by the resistance of the side frame to rotation may be neglected.
  • the vertical deflections of the slab at the backing bearing shaft centers A and B in relation to the side frame upper beam axis C and the horizontal deflections relative to the stationary vertical axis of symmetry through D may be calculated. This calculation is made at several stations across the face of the slab from front to back. For each station the corresponding vertical deflection of the side frame at C is calculated by using the said conventional beam theory, and this deflection is added to the vertical deflection of the slab relative to C at the backing bearing shaft centers A and B to give the absolute vertical deflection at A and B.
  • the deflections of struts 7 and 8 represent the vertical deflections of the upper slab and the deflections of struts 9 and 10 represent the horizontal deflections of the upper slab.
  • the struts 11, 12 and 13 in this Figure represent the pin-jointed elastic structure formed by the upper roll cluster.
  • the structure of FIG. 4 is statically determinate; and since the lengths of all of the struts are equal to the known roll diameters, the forces in all the struts can be calculated in terms of the roll separating force by elementary statics theory.
  • the force I, in FIG. 6 is the algebraic sum of the forces in the struts 7 and 9.
  • the force P in FIG. 6 is the algebraic sum of the forces in the struts 8 and l'of FIG. 4. Castiglianos theorem can then be used to calculate the displacement of the workroll (which is the base of the structure in FIG. 4) due to the deflection of the struts 7, 8, 9 and 10 at each station across the slab.
  • the side frames deflect so as to give a greater deflection at the middle than at the front or-rear side of the housing.
  • the slab will deflect more at the front and rear sides than in the middle, so that the combined effect of slab and side frame deflection at-the workroll is the same at the front and rear sides of the mill as it is in the middle.
  • housingsshaped as shown in said US. Pat. No. 2,776,586 and in FIGS. 1, 2 and 3 of the present application to deflect uniformly across its width. This is because the depth of the horizontal beams of the side'frames is so small that the resultant relatively high side. frame deflection is too great to compensate bytapering the top slab, unless the slab is made so thin that casting difficulties will result and permissible stresses will be exceeded.
  • the housing shown in FIG. 10 is one based upon the above considerations. By careful application of the theory described herein, the dimensions of a housing shaped as in FIG. l0 can be determined so that it will give zero crown when placed under load during the rolling of strip. It is to be understood that slight deviations from the shape shown in FIG. 10 are permissible in order to provide for such things as mounting bosses, lifting lugs, weight saving champfers and the like, without departing from the spirit of the invention.
  • the characteristic and novel feature of this housing is that the overall height of the side frames is equal to or greater than the maximum vertical distance from the bottom of the lower slab to the top of the upper slab.
  • the reference numerals used in FIG. 10 correspond to those in FIGS. to '7 inclusive with prime suffixes.
  • FIG. 11 is a diagram showing the deflection curves in the side frames and inthe upper slab in a housing according to FIG. under load.
  • the curves 14 are the deflection curves for the side frames.
  • the curves 15 are the deflections of the upper slab 4' at the front and rear sides and the curve 16 is the deflection curve for the slab 4' at the middle.
  • the curve 17 represents the combined deflection curve which in the case of the zero crown housing will approximate a straight line. 7
  • FIG. 11 clearly shows how the tapered slab deflects in a manner to compensate fully for the side frame deflection and thus to produce a zero crown housing.
  • the deflection and crown of the housing are affected by the width of the strip being rolled, since with narrower strip the roll separating force is concentrated more toward the middle of the housing.
  • the narrowest strip is generally no less than about half the widest strip, and because the roll separating force spreads itself more evenly from front to rear of the mill as it is' transmitted from work roll through intermediate rolls and backing bearings to the housing, the housing is still subjected to a sufficiently uniform load to ensure that the mode of deflection of the housing is substantially unchanged, and that the zero crown condition is maintained, even when rolling the narrowest strip.
  • FIG. 10 While itis preferred that the entire structure of FIG. 10 be integral, the beneficial results above described can be achieved by making'the housing in two pieces and welding or bolting the upper and lower pieces together at or adjacent the central horizontal plane indicated by the broken lines 20, 20.
  • the bolts should be of adequate capacity to ensure positive pressure between the adjacent surfaces, even when maximum roll separating force is developed during'rolling.
  • the housing may also be fabricated by bolting or welding two or more pieces together with the joints at any plane, as for example, by joining at the vertical plane passing through the work rolls, or at the horizontal planes of intersection of the columns 2 with the beams 3 (FIG. 7).
  • a housing according to claim 1 constituted of an upper and lower piece secured together approximately at the central horizontal plane to form a unitary structure.
  • a housing according to claim 1 constituted of a number of pieces secured together by welding or bolting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US00329364A 1973-02-05 1973-02-05 Housing construction for cluster type cold rolling mills Expired - Lifetime US3815401A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00329364A US3815401A (en) 1973-02-05 1973-02-05 Housing construction for cluster type cold rolling mills
CA190,489A CA998263A (en) 1973-02-05 1974-01-18 Housing construction for cluster type cold rolling mills
IT47918/74A IT1002762B (it) 1973-02-05 1974-01-24 Perfezionamento negli alloggiamenti per laminatoi a freddo del tipo a rulli in gruppo
FR7403559A FR2216032B1 (it) 1973-02-05 1974-01-28
GB401774A GB1445922A (en) 1973-02-05 1974-01-29 Housing construction for cluster-type cold rolling mills
ZA740649A ZA74649B (en) 1973-02-05 1974-01-31 Housing construction for cluster type cold rolling mills
JP1484574A JPS5334583B2 (it) 1973-02-05 1974-02-05
DE2405518A DE2405518C2 (de) 1973-02-05 1974-02-05 Gehäuse für ein Vielwalzen-Walzgerüst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00329364A US3815401A (en) 1973-02-05 1973-02-05 Housing construction for cluster type cold rolling mills

Publications (1)

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US3815401A true US3815401A (en) 1974-06-11

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US00329364A Expired - Lifetime US3815401A (en) 1973-02-05 1973-02-05 Housing construction for cluster type cold rolling mills

Country Status (8)

Country Link
US (1) US3815401A (it)
JP (1) JPS5334583B2 (it)
CA (1) CA998263A (it)
DE (1) DE2405518C2 (it)
FR (1) FR2216032B1 (it)
GB (1) GB1445922A (it)
IT (1) IT1002762B (it)
ZA (1) ZA74649B (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107971A (en) * 1977-06-14 1978-08-22 Textron, Inc. Cluster type rolling mill
US4248073A (en) * 1979-01-26 1981-02-03 T. Sendzimir, Inc. Cluster type cold rolling mill
EP0580292A1 (en) * 1992-07-20 1994-01-26 T. Sendzimir, Inc. Additional profile control for cluster mills
US5471859A (en) * 1992-07-20 1995-12-05 T. Sendzimir, Inc. Cluster mill crown adjustment system
US5481895A (en) * 1992-07-20 1996-01-09 T. Sendzimir, Inc. Second intermediate idler roll for use in a 20-high cluster mill
US5857372A (en) * 1997-02-06 1999-01-12 T. Sendzimir, Inc. Housing for cluster mills
US7234334B1 (en) 2002-08-02 2007-06-26 United Grinding And Machine Company Saddle for backing assemblies in a rolling mill
US20110113847A1 (en) * 2009-11-05 2011-05-19 Mitsubishi -Hitachi Metals Machinery, Inc. Cluster-type multistage rolling mill
CN103008989A (zh) * 2012-12-07 2013-04-03 中冶陕压重工设备有限公司 森吉米尔多辊轧机大牌坊梅花状通孔的加工方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431577U (it) * 1977-08-04 1979-03-01
JPS6027769U (ja) * 1983-07-29 1985-02-25 伊藤　幸三 装飾品収納室を設けたコップ
JPS60101436U (ja) * 1983-12-16 1985-07-10 株式会社吉野工業所 包装用容器
JPH06229U (ja) * 1992-06-08 1994-01-11 株式会社横浜プラスチック ゲーム機能付飲料水コップ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776586A (en) * 1948-06-10 1957-01-08 Armzen Company Construction and control of cold rolling mills

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE698450C (de) * 1936-10-16 1940-11-11 Tadeusz Sendzimir ei Bandwalzwerken
DE1838226U (de) * 1961-07-24 1961-09-28 Schloemann Ag Walzenstander mit abnehmbarer kappe.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776586A (en) * 1948-06-10 1957-01-08 Armzen Company Construction and control of cold rolling mills

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107971A (en) * 1977-06-14 1978-08-22 Textron, Inc. Cluster type rolling mill
US4248073A (en) * 1979-01-26 1981-02-03 T. Sendzimir, Inc. Cluster type cold rolling mill
EP0580292A1 (en) * 1992-07-20 1994-01-26 T. Sendzimir, Inc. Additional profile control for cluster mills
US5421184A (en) * 1992-07-20 1995-06-06 T. Sendzimir, Inc. Additional profile control for cluster mills
US5471859A (en) * 1992-07-20 1995-12-05 T. Sendzimir, Inc. Cluster mill crown adjustment system
US5481895A (en) * 1992-07-20 1996-01-09 T. Sendzimir, Inc. Second intermediate idler roll for use in a 20-high cluster mill
US5857372A (en) * 1997-02-06 1999-01-12 T. Sendzimir, Inc. Housing for cluster mills
US7234334B1 (en) 2002-08-02 2007-06-26 United Grinding And Machine Company Saddle for backing assemblies in a rolling mill
US20110113847A1 (en) * 2009-11-05 2011-05-19 Mitsubishi -Hitachi Metals Machinery, Inc. Cluster-type multistage rolling mill
US8794045B2 (en) * 2009-11-05 2014-08-05 Mitsubishi-Hitachi Metals Machinery, Inc. Cluster-type multistage rolling mill
CN103008989A (zh) * 2012-12-07 2013-04-03 中冶陕压重工设备有限公司 森吉米尔多辊轧机大牌坊梅花状通孔的加工方法
CN103008989B (zh) * 2012-12-07 2015-11-18 中冶陕压重工设备有限公司 森吉米尔多辊轧机大牌坊梅花状通孔的加工方法

Also Published As

Publication number Publication date
DE2405518C2 (de) 1984-05-30
JPS5334583B2 (it) 1978-09-21
DE2405518A1 (de) 1974-08-22
IT1002762B (it) 1976-05-20
CA998263A (en) 1976-10-12
FR2216032B1 (it) 1977-09-16
FR2216032A1 (it) 1974-08-30
GB1445922A (en) 1976-08-11
ZA74649B (en) 1974-12-24
JPS5046544A (it) 1975-04-25

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