GB2160808A - Method and apparatus for manufacturing moulds formed of metal tubes, to be used in continuous casting machines for billets and blooms - Google Patents
Method and apparatus for manufacturing moulds formed of metal tubes, to be used in continuous casting machines for billets and blooms Download PDFInfo
- Publication number
- GB2160808A GB2160808A GB08515903A GB8515903A GB2160808A GB 2160808 A GB2160808 A GB 2160808A GB 08515903 A GB08515903 A GB 08515903A GB 8515903 A GB8515903 A GB 8515903A GB 2160808 A GB2160808 A GB 2160808A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plug
- die
- blank
- mould
- tubular
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000009749 continuous casting Methods 0.000 title claims description 9
- 239000002184 metal Substances 0.000 title description 6
- 229910052751 metal Inorganic materials 0.000 title description 6
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 238000005266 casting Methods 0.000 claims description 7
- 238000005482 strain hardening Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 238000001192 hot extrusion Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002360 explosive Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
- B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/057—Manufacturing or calibrating the moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metal Extraction Processes (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Continuous Casting (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to a method and apparatus for manufacturing moulds which are circular arc type. A tubular blank 10 is bent into an arched form by means of a die 3, 4 conforming to the outer dimensions of the desired tube mould, and a plug 11 is drawn in an expanding draw through the tubular blank so that the path of motion of the plug is arched, which operation causes the outer surface of the tubular blank to be pressed against the die and the inner surface of the mould to be cold-worked to match the dimensions of the plug. <IMAGE>
Description
SPECIFICATION
Method and apparatus for manufacturing moulds formed of metal tubes, to be used in continuous casting machines for billets and blooms
The present invention relates to a method and apparatus for manufacturing moulds for the continuous casting of metals with a high melting temperature, particularly iron and steel, the manufactured moulds being angulate in cross-section, preferably square, rectangular or octagonal, or circular, and formed of metal tubes, for instance copper or copper alloy tubes, the preferred form of the produced mould being circular arc type.
In the continuous casting of steel and iron, it is a well-known method to use moulds which are either single-piece moulds or multi-piece moulds. Singlepiece moulds are formed of a cylindrical or prismatical tube made for example of deoxidized copper, which has proved to be suitable for this purpose owning to its high thermal conductivity.
The circular arc type mould as such is already known, and it prior art production methods are described for instance in the Finnish Patent No.
49479, where a long, arched mandrel is pressed into the metal tube serving as the initial blank, whereafter the tube is cold-worked by pressing the metal tube, along with the mandrel, through a compression collar and finally by pressing the mandrel out of the tube. Other prior art methods are among others those introduced in the German
Patent Application 2533528 and the US Patent No.
4220027, where curved moulds are manufactured by employing explosive forming. Yet another prior art method is the method introduced in the Swedish Patent Application No. 8105474-4, where a tube is drawn through an opening formed by a drawing die and plug, and the arched motion is created by means of a specific guide.
If moulds are manufactured so that the mandrel is first pressed into the tube and then the tube is cold-worked, the outside surface of the mould has higher degree of deformation than the inside thereof, and consequently while the mandrel is drawn out of the tube there is a danger that the interior of the tube is scratched; therefore it may prove to be necessary to repair the inner surface and particularly the angles by mechanical methods.
If explosive forming is applied, the production of moulds must be carried out by complex methods at many separate stages, because the tubular blank to be formed by explosion must be bent almost to the correct curvature before the forming process. If an inner mandrel is employed in explosive forming, the susceptibility of the tube to be scratched or damaged is comparable to the above described case.
By employing the method and apparatus of the present invention, it is possible to overcome the difficulties related particularly to the drawing off of the mandrel.
According to one aspect of the present invention there is provided a method for manufacturing tubular moulds for use in continuous casting machines for billets and blooms, the said moulds being formed of a tubular blank wherein a mould tubular blank having smaller outer and inner dimensions than the desired finished tube mould is bent into a curved shape by means of a die conforming to the outer dimensions of the finished mould; the bent tubular blank is cold-worked by drawing at least one plug therethrough in an expanding draw so that the path of motion of the plug matches the arched center line of the mould, whereby the outer surface of the blank is pressed against the die and the inner surface of the blank is cold worked to conform to the dimensions of the plug; and finally the tubular mould is removed from the die and finished.
The tubular blank may be made of copper or copper alloy by some prior art method such as casting, hot-extrusion, drawing or by some coldworking method so as to be somewhat smaller than the ready-made tube mould with respect to both inner and outer dimensions. The blank is bent to the shape of a circular arc type mould by means of the die and then the plug is drawn through the blank in an expanding draw so that the plug expands the tube and cold-works the inner surface of the tube into the correct size and shape. The expanding draw also causes the outer surface of the blank to be pressed against the die. The correct curvature of the inner part of the tube mould is achieved by drawing the plug along an arcuate path which advantageously conforms to the orbit of a circle.Thus, the inner surface of the tubular blank is worked by means of the plug to give it the correct dimensions, and the bending of the mould by means of the die renders it unnecessary to carry out the bending operation separately as in prior art methods.
A second aspect of the invention provides an apparatus for manufacturing tubular moulds for use in continuous casting machines wherein the apparatus comprises a die formed of at least two parts; and at least one of said parts being movable relative to the other between a first position in which the parts are apart so that a tubular blank can be situated therebetween and a second position in which the parts are pressed against each other by a power unit so that the die conforms to the desired outer dimensions of the finished mould; and a plug provided with a plug rod and arranged to move inside the tubular blank along an arcuate path while the parts of the die are in the second position, the plug being so dimensioned that its movement causes cold-working of the blank so that the outer surface of the blank is pressed against the die and the inner surface of the blank corresponds to the plug contour.
By employing the method and apparatus of the present invention, it is possible to manufacture moulds which are characterized by a good dimensional stability, good surface quality and a sufficient hardness for further uses of the mould, particularly as regards the inner surface.
In the following the invention is described in more detail with reference to the appended draw ings, where
Figure 1 is a simplified side-view illustration of the apparatus of the invention,
Figure 2 is an illustration of the same apparatus seen from the end,
Figure 3 is a cross-sectional view of the apparatus at the die section, and
Figure 4 is a schematical top-side view of another preferred embodiment of the apparatus of the invention.
From figures 1 and 2 it is apparent that the essential part of the apparatus of the invention is formed of the die frame comprising at least two separate parts 1 and 2, inside which die frame there is located the die proper, which also comprises at least two parts 3 and 4. The dimensions of the die 3, 4 correspond in cross-section to the outer dimensions of the ready-made tube mould and in lengthwise cross-section to the dimensions of the casting radius of the continuous casting machines and of the mould. The motions of the die and the die frame are adjusted by means of a conventional power unit 5, which can be for example mechanical, pneumatic, hydraulc or the like. In the case illustrated in the drawing, the bottom half 4 of the die and the bottom half of the die frame 2 are stationary and they are attached to the table 6 which is fixed to the machine body 7.The supporting structures 8 of the power unit, as well as the guide slides 9 of the top half of the die frame, are attached to the said table 6.
Figure 3 shows a more detailed illustration of the die 3, 4 and the tubular blank 10 located therein.
The first operation is to bend the tubular blank 10 into a nearly correct curvature by pressing the parts 3 and 4 together. The second operation is the cold-working of the tubular blank 10 in an expanding draw so that one or several plugs 11, the outer dimensions whereof are somewhat larger than the inner dimensions of the tubular blank, is drawn through the tubular blank placed in the die 3, 4.
The plug is attached to the arched plug rod 12. The path of motion of the plug 11 and the plug rod 12 runs mainly on the vertical plane. By employing the method of cold-working correct dimensions are achieved for the tube mould, and the mould receives the required hardness qualities, which are comparatively high, i.e. about 70-100 kp/mm2.
As is seen in figure 1, the drawing motion of the plug is actuated by means of a conventional power unit such as the hydraulic cylinder 13, the piston rod 14 whereof is attached to the pulling carriage 15 which moves along the circular arc guide rail 16. In this case the characteristic circular arc motion of the invention is achieved by means of circular arc guide rails which are replaceable and can be manufactured with various casting radii for different moulds. The support cradle 17 of the guide rails can be positioned at a suitable angle by means of the height and angle guides 18, 19. In figure 1 the guide rails along with their supporting structures are placed below the plug and the plug rod, but it is obvious that they can also be placedthereabove.
Figure 4 shows another preferred embodiment of the invention. The apparatus of the invention can also be realized so that the motion path of the plug inside the tubular blank at the drawing stage runs on the horizontal plane. The die 3, 4 along with its frame 1, 2 is attached to the table 6, which can be shifted relative to the centre of rotation 20 of the apparatus into any position determined by the casting radius of the mould. In this case the plug rod 12, 12' is formed of two parts, and it can be shifted along the body 22, 22' by means of the supports 21, respectively into the position determined by the casting radius of the mould. The drawing stage proper is carried out so that the body 22, 22' is put in partial rotating movement around it s center 20.
The finishing of the tube mould is carried out after removing it from the die.
Claims (17)
1. A method for manufacturing tubular moulds for use in continuous casting machines for billets and blooms, the said moulds being formed of a tubular blank wherein a mould tubular blank having smaller outer and inner dimensions than the desired finished tube mould is bent into a curved shape by means of a die conforming to the outer dimensions of the finished mould; the bent tubular blank is cold-worked by drawing at least one plug therethrough in an expanding draw so that the path of motion of the plug matches the arched center line of the mould, whereby the outer surface of the blank is pressed against the die and the inner surface of the blank is cold worked to conform to the dimensions of the plug; and finally the tubular mould is removed from the die and finished.
2. A method according to claim 1, wherein the outer dimensions of the plug are larger than the inner dimensions of the tubular blank.
3. A method according to claim 1 or 2, wherein the radius of the circular path of motion of the plug can be adjusted.
4. A method according to claim 1, 2 or 3, wherein the path of motion of the plug is mainly in a vertical plane.
5. A method according to claim 1, wherein the path of motion of the plug is in a horizontal plane.
6. A method according to any one of the preceding claims wherein the moulds are made of copper or copper alloy tubes and are circular arc type.
7. A method according to any one of the preceding claims wherein the tubular blank is produced by means of casting, hot-extrusion, or drawing.
8. An apparatus for manufacturing tubular moulds for use in continuous casting machines wherein the apparatus comprises a die formed of at least two parts; and at least one of said parts being movable relative to the other between a first position in which the parts are apart so that a tubular blank can be situated there-between and a second position in which the parts are pressed against each other by a power unit so that the die conforms to the desired outer dimensions of the finished mould; and a plug provided with a plug rod and arranged to move inside the tubular blank along an arcuate path while the parts of the die are in the second position, the plug being so dimensioned that its movement causes cold-working of the blank so that the outer surface of the blank is pressed against the die and the inner surface of the blank corresponds to the plug contour.
9. Apparatus according to claim 8, wherein the arcuate motion of the plug is achieved by having the end of the plug rod attached to a pulling carriage of the power unit able to move along an arcuate guide rail.
10. Apparatus according to claim 9, wherein the guide rails are replaceable.
11. Apparatus according to either of claims 9 and 10, wherein the guide rails, along with supporting structures therefor, are positioned below the path of motion of the plug and the plug rod.
12. Apparatus according to either of claims 9 and 10, wherein the guide rails, along with supporting structures therefor, are positioned above the plug and the plug rod.
13. Apparatus according to claim 8, wherein the arcuate motion of the plug is achieved by a twopart plug rod attached to a body by means of supports so as to swing in a partial rotating motion in a horizontal plane around a center of rotation.
14. Apparatus according to any one of claim 8 to 13, wherein the two separate parts of the die are replaceably carried by a die frame.
15. Apparatus according to claim 14, wherein the die frame is attached a table which can be radially shifted relative to the arcuate path of the plug relative to the die, in order to conform to the casting radius of the mould in each specific case.
16. A method for manufacturing tubular moulds, substantially as hereinbefore described with reference to the accompanying drawings.
17. Apparatus for manufacturing tubular moulds, constructed and adapted to operate substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI842579A FI71243C (en) | 1984-06-27 | 1984-06-27 | FOERFARANDE OCH ANORDNING FOER FRAMSTAELLNING AV KOPPAR- ELLERKOPPARLEGERINGSROER BILDADE KOKILLER FOER STRAENGGJUTNING SMSKINER FOER ETT AEMNE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8515903D0 GB8515903D0 (en) | 1985-07-24 |
| GB2160808A true GB2160808A (en) | 1986-01-02 |
| GB2160808B GB2160808B (en) | 1987-08-12 |
Family
ID=8519308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08515903A Expired GB2160808B (en) | 1984-06-27 | 1985-06-24 | Method and apparatus for manufacturing moulds formed of metal tubes, to be used in continous casting machines for billets and blooms |
Country Status (6)
| Country | Link |
|---|---|
| CH (1) | CH664310A5 (en) |
| DE (1) | DE3523044A1 (en) |
| ES (1) | ES8702184A1 (en) |
| FI (1) | FI71243C (en) |
| GB (1) | GB2160808B (en) |
| IT (1) | IT1185110B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0243789A2 (en) * | 1986-05-02 | 1987-11-04 | KM-kabelmetal Aktiengesellschaft | Method for manufacturing moulds for continuous-casting machines |
| FR2837409A1 (en) * | 2002-03-20 | 2003-09-26 | Airbus France | METHOD FOR FORMING AN AIR INTAKE LIP SECTOR, DEVICE FOR IMPLEMENTING SAME AND SECTOR THUS OBTAINED |
| CN100341637C (en) * | 2005-11-23 | 2007-10-10 | 大连冶金结晶器有限公司 | Method for processing banana arc crystallizer copper tube with special cross section |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4128365A1 (en) * | 1991-08-27 | 1993-03-04 | Egon Evertz | METHOD FOR REFURBISHING COPPER CHILLS FOR STEEL CASTING |
| DE102011106313A1 (en) * | 2011-06-27 | 2012-12-27 | Kme Germany Ag & Co. Kg | Method for producing a mold tube |
| CN113231609B (en) * | 2021-04-16 | 2022-07-22 | 中国重型机械研究院股份公司 | Quick positioning method for square billet crystallizer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2408325A (en) * | 1944-10-21 | 1946-09-24 | Nat Tube Co | Working tubular articles |
| DE1809633C3 (en) * | 1968-11-19 | 1979-10-31 | Kabel- Und Metallwerke Gutehoffnungshuette Ag, 3000 Hannover | Process for the production of a curved continuous mold for circular arc continuous casting machines |
| JPS59215249A (en) * | 1983-05-20 | 1984-12-05 | Kobe Steel Ltd | Production of mold for continuous casting |
| JPS59215250A (en) * | 1983-05-20 | 1984-12-05 | Kobe Steel Ltd | Production of mold for continuous casting |
-
1984
- 1984-06-27 FI FI842579A patent/FI71243C/en not_active IP Right Cessation
-
1985
- 1985-06-13 CH CH2493/85A patent/CH664310A5/en not_active IP Right Cessation
- 1985-06-19 IT IT21190/85A patent/IT1185110B/en active
- 1985-06-24 GB GB08515903A patent/GB2160808B/en not_active Expired
- 1985-06-26 ES ES544596A patent/ES8702184A1/en not_active Expired
- 1985-06-27 DE DE19853523044 patent/DE3523044A1/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0243789A2 (en) * | 1986-05-02 | 1987-11-04 | KM-kabelmetal Aktiengesellschaft | Method for manufacturing moulds for continuous-casting machines |
| EP0243789A3 (en) * | 1986-05-02 | 1989-07-12 | Km-Kabelmetal Aktiengesellschaft | Method for manufacturing moulds for continuous-casting machines |
| FR2837409A1 (en) * | 2002-03-20 | 2003-09-26 | Airbus France | METHOD FOR FORMING AN AIR INTAKE LIP SECTOR, DEVICE FOR IMPLEMENTING SAME AND SECTOR THUS OBTAINED |
| EP1348532A1 (en) * | 2002-03-20 | 2003-10-01 | Airbus France | Ultrasonic bonding method |
| CN100341637C (en) * | 2005-11-23 | 2007-10-10 | 大连冶金结晶器有限公司 | Method for processing banana arc crystallizer copper tube with special cross section |
Also Published As
| Publication number | Publication date |
|---|---|
| FI842579A0 (en) | 1984-06-27 |
| IT1185110B (en) | 1987-11-04 |
| CH664310A5 (en) | 1988-02-29 |
| GB2160808B (en) | 1987-08-12 |
| ES8702184A1 (en) | 1987-01-01 |
| FI842579A (en) | 1985-12-28 |
| ES544596A0 (en) | 1987-01-01 |
| FI71243C (en) | 1986-12-19 |
| GB8515903D0 (en) | 1985-07-24 |
| DE3523044C2 (en) | 1990-02-22 |
| IT8521190A0 (en) | 1985-06-19 |
| DE3523044A1 (en) | 1986-01-09 |
| FI71243B (en) | 1986-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920624 |