US3842471A - Composite roll - Google Patents

Composite roll Download PDF

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Publication number
US3842471A
US3842471A US00377459A US37745973A US3842471A US 3842471 A US3842471 A US 3842471A US 00377459 A US00377459 A US 00377459A US 37745973 A US37745973 A US 37745973A US 3842471 A US3842471 A US 3842471A
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US
United States
Prior art keywords
rolling ring
inner member
ring member
supporting walls
composite roll
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
Application number
US00377459A
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English (en)
Inventor
K Polhall
L Nordstrom
R Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Morgardshammar AB
Original Assignee
Morgardshammar AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Morgardshammar AB filed Critical Morgardshammar AB
Application granted granted Critical
Publication of US3842471A publication Critical patent/US3842471A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/035—Rolls for bars, rods, rounds, tubes, wire or the like

Definitions

  • the present invention relates-to a composite roll and to a method of making same.
  • the rolls to which the present invention applies preferably are used for the forming of material such as in a rolling mill, and in general the rolls include a grooved portion which is adapted to engage and shape the material as the material advances through the rolling mill.
  • rolls where the life of the portions of the rolls which contain the material engaging grooves may be prolonged by utilizing modern hard wear-resistant materials, for example, carbide. Such materials are characterized by their extraordinary hardness and great compressive strength but they do have a moderate tensile strength and do have a negligible tensile ultimate strength. Since these materials are also very expensive, it is desirable to make the rolls as composite rolls so that the part which is of the wear-resistant material is given the smallest possible volume. Accordingly, rolls have been constructed of an inner member or roll body of one material and a rolling ring of another material.
  • rolls have been constructed where the inner member or roll body has a fixed flange and against which the roller ring is compressed by a flange threaded on the roll body. In this manner, compressive stresses are achieved in the roller body and, this has affected the hardness of the material of which the roller body may be constructed. Besides, it is difficult to draw the threaded flange in such a way that great compressive forces are achieved.
  • the present invention is directed to the provision of a composite roll which is not subject to the problems outlined above with respect to the prior art.
  • the roll of the present invention is one in which a rolling ring member is supported on a roll body or inner member in a manner to establish compressive stresses therein as in the prior art.
  • the compressive stresses are established by a pair of wall or ring members which are supported on the inner member. At least one of the walls or ring members is secured to the inner member by means of a tight force-fit or shrink-fit.
  • the pair of rings orwalls On the inner member are forced against the side surface of the rolling ring with a substantial force during the assembly of the parts on the inner member. As a result, the rolling ring member is clamped between the walls on-the inner member with a substantial force and compressive stresses are established in the rolling ring member.
  • the force between the walls on the inner member and the rolling ring member is SUfiICiCl'ItSO that the frictional drag is such that the rolling ring member will rotate along with the inner member in order to properly perform its function on the material engaged, i.e., in the case of a rolling mill to properly shape the material during the rolling operation.
  • the present invention obviously therefore does not require that the rolling ring material have a lower coef- V ficient of linear expansion than theroll body or inner member as is necessary in the casting technique of the prior art.
  • the rolling ring material may be any wear-resistant material and it may have a lower, identical or greater coefficient of linear expansion than that of the roll body.
  • FIG. 2 is a sectional view of a composite roll also of the prior art in which a rolling ring is compressed by a threaded flange on the roller body;
  • FIGS. 37 are cross-sectional views of a composite roll embodying the present invention.
  • the present invention is directed to a composite roll and a method of forming same.
  • the composite roll of the present invention includes a roll body or inner member 2 which may comprise either a solid shaft or a sleeve which is intended to be mounted on a rolling drive shaft of a rolling mill or the like.
  • a rolling ring I is loosely on inner member 2.
  • the rolling ring 1 may be made of a hard wear-resistant material, such as carbide or ceramic material.
  • the rolling ring 1 of course, has a groove therein which is adapted to receive the hot metal material and shape the hot metal material as it is advanced through the rolling mill.
  • the rolling ring 1 As noted hereinabove, as the hot metal material is advanced through the rolling mill, there is a tendency for tensile stresses to be established in the rolling ring 1, and in order to control those tensile stresses and minimize and establishment of such tensile stresses, the rolling ring 1 is placed under axial compression by a pair of rings 3 which engage the opposite sides of the roll 1 and apply a substantial axial compressive force to the ring 1 in order to place the rolling ring 1 under compressive stresses. ,Thus, the tensile stresses which are caused by the heat are reduced or minimized and the tendency for fatigue cracks to be established is minimized and the life of the rolling ring I is greatly lengthened.
  • the rings 3 may be made of a material similar to that of the body of the inner member 2, and the rings 3 are secured to the inner member 2 by means of a force-fit or a shrink-fit.
  • the assembly technique is such that axial compressive forces are applied to the rings 3 and thereby to the rolling ring member 1 while the shrinkfit or force-fit is being effected.
  • the rings 3 then apply an axial force to the rolling ring member 1 which results in substantial compressive axial stresses being formed in the ring member 1.
  • the force which is applied by the ring members to the rolling ring member 1 is sufficient to cause the rolling ring member 1 and the supporting ring members 3 to rotate as a unit along with the inner member 2 to effect rolling of material and shaping of the material by the groove in the rolling ring member 1. Moreover, the force is sufficient so that the rolling ring member 1 is retained in its proper position and no relative movement occurs between any of the members 1, 2, and 3.
  • the rolling member 1 is provided with substantial compressive stresses during the formation thereof the tendency of harmful tensile stresses being established in the ring member 1 are minimized as in the prior art.
  • the wear-resistant material of the rolling ring member may have a lower, identical or greater coefficient of linear expansion than that of the roller body.
  • the rolling ring member is not axially compressed by a threaded flanged portion on the roller body, as is shown in FIG. 2, there is no problem of the type of material which is used for the roller body in view of the fact that it is not necessary to provide threads thereon.
  • FIGS. 4-7 show different modifications of composite rolls which embody the present invention.
  • the compressive effect on rolling ring 1 is provided,
  • FIG. 5 shows a further modification in which the axial force applied to the rolling ring member 1 can be increased.
  • a boss is formed on the inner member 2 and which cooperates with a tapered surface on the inner periphery of the members 3 to increase the axial compressive force which is supplied by the rings to the ring member I.
  • the ring 1 is shaped with an outwardly tapering cross section, and as a result as the rings3 are forced axially toward the ring 1, a radial component force is applied to the rolling ring member I which increases the compressive stresses in the ring 1.
  • an inwardly conical intermediate sleeve 4 is provided which is disposed between the rings 1 and 3 on the one hand, the inner member 2, on the other hand.
  • the inner member 2 is forced into the sleeve 4 and due to the conical or tapered surfaces of the members 2 and 4, the member 4 is pressed radially outwardly and into a tight force fit engagement with the peripheral surfaces of the rings 3.
  • the rings 3 are heated prior to their mounting on the member 2. Once heated, the rings are slipped on the member 2. Then axial compressive forces are applied to the rings 3 in order to set up the axial or compressive stresses in the ring 1.
  • Such can be applied by any suitable external means. As the rings 3 cool, they shrink down onto the inner member 2, and as a result they are force-fit or shrunk-fit into engagement with the member 2. After cooling has been effected, the axial forces applied to the rings 3 by the external means may be removed.
  • the composite ring embodying the present invention is provided.
  • the rings 3 may be press-fit onto the inner member 2 and during the press-fitting effecting the axial compression of the rolling ring 1.
  • the rolling ring 1 was loosely positioned on the inner member 2 is caused to rotate as a unit with the inner member 2 due to the frictional forces between the periphery of the rings 3 and the rolling ring 1.
  • the frictional force-fit of the rings 3 on the inner member 2 maintains the compressive stresses in the rolling ring 2.
  • a composite roll comprising an inner member, at least one rolling ring member of a hard wear-resistant material encircling said inner member, said inner member having a supporting wall on either side of the rolling ring member, said supporting walls applying compressive axial forces against the opposite surfaces of said rolling ring member to establish compressive stresses in the rolling ring member, at least one of said supporting walls being secured to saidinner member by means of a force-fit, said supporting wall members applying a compressive force to said rolling ring member which is sufficient to cause the rolling ring member to rotate with the inner member during shaping of material.
  • a composite roll according to claim 5 wherein said rolling ring member and said pair of ring members are mounted on an inwardly conical intermediate sleeve into which the inner member which is outwardly conical is pressed, said rolling ring member having an inner diameter that is loosely fit on said intermediate sleeve after the inner member has been pressed into the intermediate sleeve.
  • a method of forming a composite roll comprising the steps of providing an inner roll member, loosely encircling the inner roll member with a hard wear-resistant rolling ring, locating supporting walls on the opposite axial sides of said rolling ring, applying axial compressive forces to said rolling ring to thereby set up axial compressive stresses in said rolling ring member, and force fitting at least one of said supporting walls on said inner member while maintaining said axial compressive forces on said rolling ring member whereby said rolling ring is axially compressed between said supporting walls and is rotatable with said inner roll member.
  • a composite roll comprising an inner member, at least one rolling ring member of a hard wear-resistant material encircling said inner member, said inner member having a supporting wall on either side of the rolling ring member, said supporting walls applying compressive axial forces against the opposite surfaces of said rolling ring member to establish compressive stresses in e the rolling ring member, the supporting walls being shaped with annular clearance between the inner member and the walls in the area axially adjacent a radial surface of the rolling member whereby said supporting walls contact said rolling ring member only at the outer periphery thereof, cylindrical inner surfaces of at least one of the supporting walls being provided with clear ance adjacent the rolling ring member, at least one of said supporting walls being secured to said inner member by means of a force-fit, said supporting wall members applying a compressive force to said rolling ring member which is sufficient to cause the rolling ring member to rotate with the inner member during shaping of material.
  • a composite roll according to claim 12 wherein said rolling ring member and said pair of ring members are mounted on an inwardly conical intermediate sleeve into which the inner member which is outwardly conical is pressed, said rolling ringmember having an inner diameter that is loosely fit on said intermediate sleeve after the inner member has been pressed into the intermediate sleeve.
  • a method of forming a composite roll as set forth in claim a wherein the step of force fitting at least one of the supporting walls on the inner member while maintaining said axial compressive forces on said rolling ring member includes the steps of heating the supporting wall, placing the supporting wall on the inner roll member, applying axial compressive forces to the supporting walls, and allowing the heated supporting wall to cool.

Landscapes

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Massaging Devices (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US00377459A 1972-07-07 1973-07-09 Composite roll Expired - Lifetime US3842471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7209009A SE371756B (nl) 1972-07-07 1972-07-07

Publications (1)

Publication Number Publication Date
US3842471A true US3842471A (en) 1974-10-22

Family

ID=20275594

Family Applications (1)

Application Number Title Priority Date Filing Date
US00377459A Expired - Lifetime US3842471A (en) 1972-07-07 1973-07-09 Composite roll

Country Status (12)

Country Link
US (1) US3842471A (nl)
CA (1) CA982374A (nl)
CS (1) CS179987B2 (nl)
DD (1) DD106787A5 (nl)
DE (1) DE2334212A1 (nl)
ES (1) ES416689A1 (nl)
FR (1) FR2191949B1 (nl)
GB (1) GB1438510A (nl)
IT (1) IT990895B (nl)
NO (1) NO137228C (nl)
PL (1) PL85630B1 (nl)
SE (1) SE371756B (nl)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953914A (en) * 1974-08-02 1976-05-04 Kennametal Inc. Mounting arrangement
US3974555A (en) * 1974-05-20 1976-08-17 Schwarzkopf Development Corporation Rolls for rolling mills and method for making same
US4094707A (en) * 1976-08-09 1978-06-13 Mannesmann Aktiengesellschaft Making withdrawal rollers for ingots
US4112564A (en) * 1975-01-31 1978-09-12 Seco Tools Aktiebolag Method of making a composite roller
EP0123490A1 (en) * 1983-04-22 1984-10-31 Hitachi, Ltd. Rolls for rolling mills
US4866968A (en) * 1987-06-17 1989-09-19 Westinghouse Electric Corp. High strength cemented carbide dies and mandrels for a pilgering machine
US4961261A (en) * 1987-06-27 1990-10-09 Nippon Steel Corporation Roll for mill and method of making a roll for a mill
US5290507A (en) * 1991-02-19 1994-03-01 Runkle Joseph C Method for making tool steel with high thermal fatigue resistance
US5359773A (en) * 1991-12-05 1994-11-01 Sumitomo Metal Industries, Ltd. Manufacturing method of the roll main body of a caliber roll
US20060287178A1 (en) * 2005-06-17 2006-12-21 Sandvik Intellectual Property Ab Roll as well as a spacer ring therefor
JP2006349173A (ja) * 2005-06-17 2006-12-28 Sandvik Intellectual Property Ab ロール
CN109759450A (zh) * 2018-12-26 2019-05-17 中钢集团邢台机械轧辊有限公司 一种用于轧钢的组合辊及其制造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342159A (en) * 1940-04-01 1944-02-22 Francis D Moran Composite roll
DE1815812A1 (de) * 1968-12-19 1970-06-25 Hufnagl Walter Rolle zum Kaltverformen von Walzdraht zu Bewehrungsstaeben
DE1961942A1 (de) * 1968-12-10 1970-06-25 British Iron Steel Research Arbeitswalzen-Aufbau fuer Walzwerke
US3577619A (en) * 1969-05-12 1971-05-04 Sandvikens Jernverks Ab Method of manufacturing composite hardmetal rolls
US3667096A (en) * 1967-09-18 1972-06-06 Sandvikens Jernverks Ab Roll device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342159A (en) * 1940-04-01 1944-02-22 Francis D Moran Composite roll
US3667096A (en) * 1967-09-18 1972-06-06 Sandvikens Jernverks Ab Roll device
DE1961942A1 (de) * 1968-12-10 1970-06-25 British Iron Steel Research Arbeitswalzen-Aufbau fuer Walzwerke
DE1815812A1 (de) * 1968-12-19 1970-06-25 Hufnagl Walter Rolle zum Kaltverformen von Walzdraht zu Bewehrungsstaeben
US3577619A (en) * 1969-05-12 1971-05-04 Sandvikens Jernverks Ab Method of manufacturing composite hardmetal rolls

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974555A (en) * 1974-05-20 1976-08-17 Schwarzkopf Development Corporation Rolls for rolling mills and method for making same
US3953914A (en) * 1974-08-02 1976-05-04 Kennametal Inc. Mounting arrangement
US4112564A (en) * 1975-01-31 1978-09-12 Seco Tools Aktiebolag Method of making a composite roller
US4094707A (en) * 1976-08-09 1978-06-13 Mannesmann Aktiengesellschaft Making withdrawal rollers for ingots
EP0123490A1 (en) * 1983-04-22 1984-10-31 Hitachi, Ltd. Rolls for rolling mills
US4866968A (en) * 1987-06-17 1989-09-19 Westinghouse Electric Corp. High strength cemented carbide dies and mandrels for a pilgering machine
US4961261A (en) * 1987-06-27 1990-10-09 Nippon Steel Corporation Roll for mill and method of making a roll for a mill
US5290507A (en) * 1991-02-19 1994-03-01 Runkle Joseph C Method for making tool steel with high thermal fatigue resistance
US5359773A (en) * 1991-12-05 1994-11-01 Sumitomo Metal Industries, Ltd. Manufacturing method of the roll main body of a caliber roll
US5406706A (en) * 1991-12-05 1995-04-18 Sumitomo Metal Industries, Ltd. Manufacturing method of the body of a caliber roll
US20060287178A1 (en) * 2005-06-17 2006-12-21 Sandvik Intellectual Property Ab Roll as well as a spacer ring therefor
JP2006349173A (ja) * 2005-06-17 2006-12-28 Sandvik Intellectual Property Ab ロール
JP2006349181A (ja) * 2005-06-17 2006-12-28 Sandvik Intellectual Property Ab ロールとそれのためのスペーサーリング
US7582046B2 (en) * 2005-06-17 2009-09-01 Sandvik Intellectual Property Ab Roll as well as a spacer ring therefor
CN109759450A (zh) * 2018-12-26 2019-05-17 中钢集团邢台机械轧辊有限公司 一种用于轧钢的组合辊及其制造方法

Also Published As

Publication number Publication date
FR2191949A1 (nl) 1974-02-08
DD106787A5 (nl) 1974-07-05
CS179987B2 (en) 1977-12-30
DE2334212A1 (de) 1974-01-24
CA982374A (en) 1976-01-27
FR2191949B1 (nl) 1978-07-21
GB1438510A (en) 1976-06-09
SE371756B (nl) 1974-12-02
NO137228B (no) 1977-10-17
ES416689A1 (es) 1976-06-01
PL85630B1 (nl) 1976-04-30
NO137228C (no) 1978-01-25
IT990895B (it) 1975-07-10

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