GB2037626A - Manufacture of metallic composite sections - Google Patents

Manufacture of metallic composite sections Download PDF

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Publication number
GB2037626A
GB2037626A GB7941773A GB7941773A GB2037626A GB 2037626 A GB2037626 A GB 2037626A GB 7941773 A GB7941773 A GB 7941773A GB 7941773 A GB7941773 A GB 7941773A GB 2037626 A GB2037626 A GB 2037626A
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GB
United Kingdom
Prior art keywords
layer
base layer
facing
facing layer
section
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.)
Granted
Application number
GB7941773A
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GB2037626B (en
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.)
T I METSEC Ltd
Original Assignee
T I METSEC Ltd
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 T I METSEC Ltd filed Critical T I METSEC Ltd
Priority to GB7941773A priority Critical patent/GB2037626B/en
Publication of GB2037626A publication Critical patent/GB2037626A/en
Application granted granted Critical
Publication of GB2037626B publication Critical patent/GB2037626B/en
Expired legal-status Critical Current

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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
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/04—Making rigid structural elements or units, e.g. honeycomb structures composite sheet metal profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)

Abstract

A cold rolled metal section is manufactured from a base layer formed from one metal and a relatively thin facing layer formed from a second metal. The layers are rolled together so that the edges of the facing layer are wrapped around and closed upon those of the base layer so as to form the composite structure of the required section. A layer of adhesive or double sided adhesive tape may be introduced between the base layer and the facing layer. The facing layer may also be covered with a flexible coating, e.g. paint or plastics material.

Description

SPECIFICATION Cold rolled metal sections This invention relates to cold rolled metal sections.
According to one aspect of the present invention, a cold rolled metal section comprises a base layer formed from one metal with a relatively thin facing layer formed from a second metal, said layers being rolled together so that the edges of the facing layer are wrapped around and closed upon those of the base layer and the composite structure is of the required section.
According to a further aspect of the present invention, a method of forming a cold rolled metal section comprises feeding lengths of two different metals through a cold rolling machine, one of the lengths of metal forming a base layer and the other forming a facing layer, the length of metal forming the facing layer being relatively thin compared with the length of metal forming the base layer and overlying the layer forming the base layer by a small amount on the longitudinal edges, as the lengths of metal pass through the rolling machine, the overlying edges of the facing layer initially being wrapped around and closed upon the adjacent edges of the base layer to join the two layers mechanically, the composite strip so formed then being shaped to the required section.
Preferably the facing layer is partially preformed before the base layer is fed into the rolls. In order to do this the facing layer is fed between a preliminary set of rolls where it is partially formed. The base layer is then fed in parallel to the partially preformed facing layer, to the next set of rolls, where the edges of the facing layer are closed over the base layer to form a composite strip which is held together mechanically. This composite strip then passes through further sets of rolls where it is bent to the required section profile.
The initial rolling stages in which the edges of the facing layer are wrapped and closed around the edges of the base layer, are preferably carried out without a lubricant in order to avoid corrosion problems caused by lubricant trapped between the layers. Normal cold rolling lubricants may be applied to the composite strip once the edges of the facing layer have been closed about the edges of the base layer, for the subsequent section shaping stage. An adhesive or double sided adhesive tape may be applied between the facing layer and the base layer before they are fed into the rolling machine, so that in the final rolled section the layers are bonded together.
Rolled metal sections according to this invention may be used in many applications, for example, vehicle bumpers or sections for the shop fitting industry. The sections provide an economical alternative in applications where hitherto sections have been formed wholly of an expensive material such as stainless steel. Various combinations of metals may be used, however, it is desirable to use combinations of metals which will not lead to corrosion problems, for example, a facing layer of stainless steel upon a base layer of aluminium, or a facing layer of aluminium upon a base layer of steel.
Furthermore the facing layer may be pre-finished with a flexible coating of, for example, paint or a plastics material, prior to the rolling process. The thicknéssrof the facing låyer may be varied depend ng on t e requirements of the particular application, fiowever; thicknesses of the order of 10 thousandths of an inch will generally be found appropriate.
While the rolled metal sections according to the present invention may be formed to any cross section, it is preferable that the facing layer is on the outside of the section so that it is stretched with respect to the'base layer and rippling of the facing layer is thereby avoided. However, when the facing layer is required on a generally concave surface, the rippling problem may be overcome by a suitable progression of rolls configurations on the rolling machine, these rolls being designed such that the amount of material around the curve (in the profile) being forined of both layers is equal in amount, relative to the degree of radius being formed with respect t each and that it is constrained by the rolls in subsequent formingoperations whilst the remain ing profile is formed, ensuring that the outer layer is stretched as previously mentioned.
If for any reason this is proved inadequate, such as where this concave radius loses roll cover during later stages of forming, then an adhesive or double sided adhesive tape may be applied between the layers before forming. An example of this would be where the radius being formed is more than a half circle, that it is physically impossible for the rolls to be in contact with the facing strip all through the forming -process.
When it is necessary to bend the rolled section axially to obtain the necessary sweep for such components as bumpers, this may be done by bending the rolled section to a constant radius on the rollirig machine, after the profile has been fotmed7bbt before being cut-off with a flying sheer orequivalent mechanism.In order to prevent rip pling of-the profile on the extremities adjacent to the ins'ide-bf'the radius being formed, it may be necessary to apply a layer of adhesive or double sided adhesive tape between the facing and base layers, this enables the forming pressures, required to stretch the top surface of the section longitudinal ly in the direction of rolling and necessary to prevent rippling'íofthe profile, to be applied.
4 r.
1. A cold rolled metal section comprising a base Iayer la e? fbr'-rned from one metal with a relatively thin facing Iaydr formed from a second metal, said layers obèing-rolled together so that the edges of the facing are wrapped around and closed upon those of the base layer and the composite structure is of the required section.
2. Aicold rolled metal section according to claim 1 in which the facing layer is bonded to the base layer by .means of an adhesive or double sided adhesive tape.
3. A cold rolled metal section according to claim 1 or 2 in which the metal of the base layer and that of
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (16)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Cold rolled metal sections This invention relates to cold rolled metal sections. According to one aspect of the present invention, a cold rolled metal section comprises a base layer formed from one metal with a relatively thin facing layer formed from a second metal, said layers being rolled together so that the edges of the facing layer are wrapped around and closed upon those of the base layer and the composite structure is of the required section. According to a further aspect of the present invention, a method of forming a cold rolled metal section comprises feeding lengths of two different metals through a cold rolling machine, one of the lengths of metal forming a base layer and the other forming a facing layer, the length of metal forming the facing layer being relatively thin compared with the length of metal forming the base layer and overlying the layer forming the base layer by a small amount on the longitudinal edges, as the lengths of metal pass through the rolling machine, the overlying edges of the facing layer initially being wrapped around and closed upon the adjacent edges of the base layer to join the two layers mechanically, the composite strip so formed then being shaped to the required section. Preferably the facing layer is partially preformed before the base layer is fed into the rolls. In order to do this the facing layer is fed between a preliminary set of rolls where it is partially formed. The base layer is then fed in parallel to the partially preformed facing layer, to the next set of rolls, where the edges of the facing layer are closed over the base layer to form a composite strip which is held together mechanically. This composite strip then passes through further sets of rolls where it is bent to the required section profile. The initial rolling stages in which the edges of the facing layer are wrapped and closed around the edges of the base layer, are preferably carried out without a lubricant in order to avoid corrosion problems caused by lubricant trapped between the layers. Normal cold rolling lubricants may be applied to the composite strip once the edges of the facing layer have been closed about the edges of the base layer, for the subsequent section shaping stage. An adhesive or double sided adhesive tape may be applied between the facing layer and the base layer before they are fed into the rolling machine, so that in the final rolled section the layers are bonded together. Rolled metal sections according to this invention may be used in many applications, for example, vehicle bumpers or sections for the shop fitting industry. The sections provide an economical alternative in applications where hitherto sections have been formed wholly of an expensive material such as stainless steel. Various combinations of metals may be used, however, it is desirable to use combinations of metals which will not lead to corrosion problems, for example, a facing layer of stainless steel upon a base layer of aluminium, or a facing layer of aluminium upon a base layer of steel. Furthermore the facing layer may be pre-finished with a flexible coating of, for example, paint or a plastics material, prior to the rolling process. The thicknéssrof the facing låyer may be varied depend ng on t e requirements of the particular application, fiowever; thicknesses of the order of 10 thousandths of an inch will generally be found appropriate. While the rolled metal sections according to the present invention may be formed to any cross section, it is preferable that the facing layer is on the outside of the section so that it is stretched with respect to the'base layer and rippling of the facing layer is thereby avoided. However, when the facing layer is required on a generally concave surface, the rippling problem may be overcome by a suitable progression of rolls configurations on the rolling machine, these rolls being designed such that the amount of material around the curve (in the profile) being forined of both layers is equal in amount, relative to the degree of radius being formed with respect t each and that it is constrained by the rolls in subsequent formingoperations whilst the remain ing profile is formed, ensuring that the outer layer is stretched as previously mentioned. If for any reason this is proved inadequate, such as where this concave radius loses roll cover during later stages of forming, then an adhesive or double sided adhesive tape may be applied between the layers before forming. An example of this would be where the radius being formed is more than a half circle, that it is physically impossible for the rolls to be in contact with the facing strip all through the forming -process. When it is necessary to bend the rolled section axially to obtain the necessary sweep for such components as bumpers, this may be done by bending the rolled section to a constant radius on the rollirig machine, after the profile has been fotmed7bbt before being cut-off with a flying sheer orequivalent mechanism.In order to prevent rip pling of-the profile on the extremities adjacent to the ins'ide-bf'the radius being formed, it may be necessary to apply a layer of adhesive or double sided adhesive tape between the facing and base layers, this enables the forming pressures, required to stretch the top surface of the section longitudinal ly in the direction of rolling and necessary to prevent rippling'íofthe profile, to be applied. CLAIMS 4 r.
1. A cold rolled metal section comprising a base Iayer la e? fbr'-rned from one metal with a relatively thin facing Iaydr formed from a second metal, said layers obèing-rolled together so that the edges of the facing are wrapped around and closed upon those of the base layer and the composite structure is of the required section.
2. Aicold rolled metal section according to claim
1 in which the facing layer is bonded to the base layer by .means of an adhesive or double sided adhesive tape.
3. A cold rolled metal section according to claim
1 or 2 in which the metal of the base layer and that of the facing layer are such that corrosion problems will not result.
4. A cold rolled metal section according to claim 3 in which the facing layer is stainless steel and the base layer is galvanized mild steel or aluminium.
5. A cold rolled metal section according to claim 3 in which the facing layer is aluminium and the base layer is steel.
6. A cold rolled metal section according to any of the preceding claims in which the facing layer is pre-finished with a flexible coating, before it is rolled.
7. A cold rolled metal section according to claim 6 in which the flexible coating is a paint or plastics material.
8. A cold rolled metal section according to any of the preceding claims in which the facing layer is of the order of 0.025 mm thick.
9. a method of forming a cold rolled metal section comprises feeding lengths of two different metals through a cold rolling machine, one of the lengths of metal forming a base layer and the other forming a facing layer, the length of metal forming the facing layer being relatively thin compared with the length of metal forming the base layer and overlying the layer forming the base layer by a small amount on the longitudinal edges; as the lengths of metal pass through the rolling machine, the overlying edges of the facing layer initially being wrapped around and closed upon the adjacent edges of the base layer to join the two layers mechanically, the composite strip so formed being shaped to the required section.
10. A method according to claim 9 in which the facing layer is partially preformed by a preliminary set of rolls, before the base layer is fed in parallel to thefacing layer, into the rolling machine.
11. A method according to claim 9 or 10 in which the initial rolling stage, in which the edges of the facing layer are wrapped around and closed upon the edges of the base layer, is carried out without lubricant, in order to avoid corrosion problems which may result from lubricant trapped between the two layers.
12. A method according to claim 11 in which normal cold rolling lubricants are applied to the composite strip once the edges of the facing layer have been closed about the edges of the base layer.
13. A method according to any one of claims 9 to 12 in which after the section has been rolled to the required profile, it is passed through further rolls by means of which it is bent axially, to a constant radius.
14. A method according to any one of claims 9 to 13 in which a layer of adhesive or double sided adhesive tape is introduced between the facing layer and base layer before they are rolled together.
15. A cold rolled metal section substantially as described herein.
16. A method of forming a cold rolled meat section substantially as described herein.
GB7941773A 1978-12-06 1979-12-04 Manufacture of metallic composite sections Expired GB2037626B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7941773A GB2037626B (en) 1978-12-06 1979-12-04 Manufacture of metallic composite sections

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7847414 1978-12-06
GB7941773A GB2037626B (en) 1978-12-06 1979-12-04 Manufacture of metallic composite sections

Publications (2)

Publication Number Publication Date
GB2037626A true GB2037626A (en) 1980-07-16
GB2037626B GB2037626B (en) 1982-11-24

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Application Number Title Priority Date Filing Date
GB7941773A Expired GB2037626B (en) 1978-12-06 1979-12-04 Manufacture of metallic composite sections

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008059179A1 (en) * 2006-11-16 2008-05-22 Profiline, Societe A Responsabilite Limitee Complex section consisting of a metal section covered with a metal foil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008059179A1 (en) * 2006-11-16 2008-05-22 Profiline, Societe A Responsabilite Limitee Complex section consisting of a metal section covered with a metal foil
FR2908858A1 (en) * 2006-11-16 2008-05-23 Profiline Sarl PROFILE COMPLEXE CONSISTING OF A METALLIC PROFILE COATED WITH A METAL FOIL.
US8057628B2 (en) 2006-11-16 2011-11-15 Profiline, Societe A Responsabilite Limitee Complex section consisting of a metal section covered with a metal foil

Also Published As

Publication number Publication date
GB2037626B (en) 1982-11-24

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee