SE447348B - PROCEDURE AND DEVICE FOR ROLLING A ROLLED STRAULER - Google Patents
PROCEDURE AND DEVICE FOR ROLLING A ROLLED STRAULERInfo
- Publication number
- SE447348B SE447348B SE7904943A SE7904943A SE447348B SE 447348 B SE447348 B SE 447348B SE 7904943 A SE7904943 A SE 7904943A SE 7904943 A SE7904943 A SE 7904943A SE 447348 B SE447348 B SE 447348B
- Authority
- SE
- Sweden
- Prior art keywords
- pipe
- tube
- cold
- outer diameter
- forming
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/12—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by stretching with or without twisting
-
- 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
-
- 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
- B21C19/00—Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
-
- 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
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
-
- 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
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/08—Dies; Selection of material therefor; Cleaning thereof with section defined by rollers, balls, or the like
-
- 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
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/12—Die holders; Rotating dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Heat Treatment Of Steel (AREA)
Description
447 348 2 Denna uppgift löses enligt uppfinningen så att det avrullade röret före uträtningen, vid eller strax före övergångsstället från krökt till rak form, genom att dras genom en i dragriktningen avsmalnande verktygsöppning under reducering av rörets ytterdiameter med högst 4 % underkastas en kallformning, som upphäver rörgodsets från glödg- ningen härrörande utpräglade sträckgräns. This object is solved according to the invention so that the unrolled tube before straightening, at or just before the transition point from curved to straight shape, by being pulled through a tool opening tapered in the pulling direction while reducing the outer diameter of the tube by no more than 4%, which is cold formed. cancels the marked tensile limit of the pipe material resulting from the annealing.
Vid användning av detta förfarande minskas i varje fall benä- genheten för flytfigurer och spriokbildning och sträckgränsen påverkas så att sträckgränstöjningen cf F märkligt eller nästan fullständigt avlägsnas. Detta medför att de mekaniska egenskaperna hos det glödga- de metallröret efter behandlingen icke som förut följer kurvan I i fig 1, utan exempelvis enligt kurvan II. Denna kurva har ett kontinu- aerligt förl0pp, d v s omformningen av det glödgade röret vid uträt- ningen blir homogen även i sträckgränsområdet. Sker denna uträtning i ett plan erhålles en verklig förbättring av rörets yta genom att så- väl flytfiguren som sprickbildningen minskas eller nästan avlägsnas.When using this method, the tendency for floating figures and crack formation is reduced in each case and the yield strength is affected so that the yield strength cf F is remarkably or almost completely removed. This means that the mechanical properties of the annealed metal pipe after the treatment do not follow curve I in Fig. 1 as before, but for example according to curve II. This curve has a continuous course, ie the reshaping of the annealed tube during straightening becomes homogeneous even in the yield strength range. If this straightening takes place in a plane, a real improvement of the surface of the pipe is obtained by reducing or almost removing both the float figure and the crack formation.
Detta både för svetsade och sömlösa rör, särskilt stålrör. Den kalla hålformningen sker företrädesvis genom tillsatssmörjning av dragverk- tyget med ett förformningsverktyg med en sluten, i dragningsriktningen stillastående dragring som är placerad efter dragverktyget.This is for both welded and seamless pipes, especially steel pipes. The cold hole forming takes place preferably by additional lubrication of the drawing tool with a preforming tool with a closed, in the drawing direction stationary pulling ring which is placed after the pulling tool.
Dragringen placeras företrädesvis i området mellan det krökta röret och det rakdragna och tjänar-därvid samtidigt som medel för just rakdragningen, varigenom tillverkning och skötsel blir billigare. Om- formningskraften erhålles genom själva håldragningen. Som dragverk kan exempelvis användas en pâhaspel, men då måste röret på nytt rak- dragas före vidarebearbetningen. Den stora fördelen med denna anord- ning består till en del i att man använder haspeltrummor, varigenom stora draghastigheter kan användas. Dessutom behövs endast i liten ut- sträckning dragvinklar. Ä andra sidan kan dragvågen i en dragbänk an- vändas med en eller flera dragtänger.The pull ring is preferably placed in the area between the curved tube and the straight line and thereby serves as a means for the straight line, whereby manufacturing and maintenance becomes cheaper. The reshaping force is obtained through the actual drilling. For example, an on-reel reel can be used as the drawbar, but then the pipe must be straightened again before further processing. The great advantage of this device consists in part in the use of reel drums, whereby high towing speeds can be used. In addition, draw angles are only needed to a small extent. On the other hand, the drawbar in a drawbar can be used with one or more drawbars.
Uppfinningens uppgift löses med hänsyn till kallhålformningen genom ett reducervalsverk med kalibrerade valsar. Detta består före- trädesvis av ett första valsstolpar och efter detta minst ännu ett stolpar, av vilka minst det första och det andra har i 90° vriden 4 valskaliber. Härvid sker reducering av rörets ytterdiameter redan i första stolparet upp till 4 %. Om samtidigt en ovalformning företagas sker i ett därefter kopplat valspar en återföring till cirkulärt tvär- snitt. Även vid hålvalsning är det fördelaktigt att en vidarebearbet- -ningsmaskin är efterkopplad, varvid dennas dragverk utgör en del. Även 447 548 i andra fall, t ex om ett reducerverk följer efter det första valspa- ret, kan det vara lämpligt att ge röret ett från rundformen avvikande tvärsnitt och göra valsarna i det sista verket 6b pàverkbara av en vriddrivanordning. I en föredragen utföringsform av uppfinningen är ' valsarna i ett stolpar, företrädesvis det första, drivna av en vriden- ordning, varvid valsarna i redueeringsverket tjänar icke endast för drag-tryck-omformning av röret utan även för inledande av dragkraft i arbetsstycket. Efter ännu en vidareutveckling av uppfinningen är val- sarna i reducerverket användbara som bookningsanordniny. Det så ut- formade reducerverket är t ex användbart för de större dimensionerna i det nämnda rörmaterialet.The object of the invention is solved with regard to the cold hole forming by a reducer rolling mill with calibrated rollers. This preferably consists of a first roll posts and after this at least one more post, of which at least the first and the second have 4 roll calibers rotated at 90 °. In this case, the outer diameter of the pipe is already reduced in the first post up to 4%. If an oval formation is undertaken at the same time, a return to a circular cross-section takes place in a pair of rollers connected afterwards. Even in the case of hole rolling, it is advantageous for a further processing machine to be switched on, whereby its drawbar forms a part. Also 447 548 in other cases, for example if a reducer follows the first pair of rollers, it may be appropriate to give the tube a cross section deviating from the round shape and to make the rollers in the last unit 6b impactable by a rotary drive device. In a preferred embodiment of the invention, the rollers in a posts, preferably the first, are driven by a rotating device, the rollers in the reducer serving not only for tensile-pressure transformation of the pipe but also for initiating tensile force in the workpiece. After a further development of the invention, the rollers in the reducer are useful as booking devices. The reducer so designed is, for example, useful for the larger dimensions of the mentioned pipe material.
En utföringsform av uppfinningen beskrivas nedan under hänvis- ning till bifogade ritningar, i vilka fig 1 visar ett spännings-töj- ningsdiagram med och utan utpräglad sträckgräns, fig 2 en principskiss av ettutrullat,glödgat metallrör under avhaspling, fig 3 en schematisk bild av en anordning för håldragning och fig 4 en anordning enligt uppfinningen för hålvalsning och -dragning.An embodiment of the invention is described below with reference to the accompanying drawings, in which Fig. 1 shows a stress-strain diagram with and without a pronounced yield strength, Fig. 2 a principle sketch of a rolled-out, annealed metal tube during unwinding, Fig. 3 a schematic view of a device for hole drawing and Fig. 4 a device according to the invention for hole rolling and drawing.
Av fig 1 framgår de mekaniska egenskaperna hos ett avhasplat, glödgat metallrör av stål med en ytterdiameter av 10 mm. Kurvan I vi- sar ett spännings-töjningsdiagram med en utpräglad sträckgräns C350, en undre sträokgräns (S Su och en större sträckgränstöjning Ö F. Se- dan röret före bockningen kalldragits med en reduktion av ytterdiame- tern med ca 2,5 % är den utpräglede sträckgränsen, resp sträckgräns- töjningen Ä F fullständigt upphävd. Spännings-töjnings-beroende visas därvid genom kurvan II i fig 1, som inom alla områden har ett konti- nuerligt förlopp.Fig. 1 shows the mechanical properties of a coiled, annealed steel metal tube with an outer diameter of 10 mm. Curve I shows a stress-strain diagram with a pronounced yield strength C350, a lower yield strength (S Su and a larger yield strength Ö F. Since the pipe before bending has been drawn cold with a reduction of the outer diameter by about 2.5%, it is pronounced yield strength, or yield strength elongation Ä F is completely abolished, stress-strain dependence is shown by curve II in Fig. 1, which in all areas has a continuous course.
Ett metallrör 1 i fig 2 är upplindat på en haspel 2, vilket à- skådliggöres genom en dragkraft X som drar över ett par rullar 3. Un- der avhasplingen uträtas röret, men vissa krökar kvarstår så att det utdragna röret är vàgformat. I fig 3 visas hur röret drages genom en dragskiva 4 med samma kraft X och en icke visad draganordning, varige- nom det blir helt rakt.A metal tube 1 in Fig. 2 is wound on a reel 2, which is illustrated by a traction force X which pulls over a pair of rollers 3. During the unwinding, the tube is straightened, but some bends remain so that the extended tube is wave-shaped. Fig. 3 shows how the pipe is pulled through a pulling disc 4 with the same force X and a pulling device (not shown), whereby it becomes completely straight.
I fig 4 visas hur röret drages genom ett reducervalsverk 5 med efter varandra placerade valsstolpar 6a och 6b om vardera två valsar.Fig. 4 shows how the pipe is pulled through a reducer rolling mill 5 with successively placed roll posts 6a and 6b about two rollers each.
Valsparen är ställda i 90° vinkel mot varandra så att reduceringen sker med i 90° förställda kalibrar. Den nödvändiga valsutrustningen beror på rördimensionerna, materialet och om den följande valsstolen avser speciella former.The roller pairs are set at a 90 ° angle to each other so that the reduction takes place with calibers set at 90 °. The necessary rolling equipment depends on the pipe dimensions, the material and whether the following rolling chair refers to special shapes.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2829058A DE2829058C2 (en) | 1978-07-01 | 1978-07-01 | Method and device for pulling off a steel pipe wound into a pipe bundle for the purpose of further processing it on a straight pipe string |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7904943L SE7904943L (en) | 1980-01-02 |
SE447348B true SE447348B (en) | 1986-11-10 |
Family
ID=6043353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7904943A SE447348B (en) | 1978-07-01 | 1979-06-06 | PROCEDURE AND DEVICE FOR ROLLING A ROLLED STRAULER |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2829058C2 (en) |
FR (1) | FR2429626A1 (en) |
IT (1) | IT1116888B (en) |
SE (1) | SE447348B (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR584507A (en) * | 1924-07-10 | 1925-02-09 | Further training in shrinking machines | |
GB397566A (en) * | 1932-03-07 | 1933-08-31 | Harold Dyson | Improvements in or relating to wire drawing apparatus and the like |
US2378729A (en) * | 1941-12-17 | 1945-06-19 | Dow Chemical Co | Cold-working magnesium alloy tubes |
DE911365C (en) * | 1950-02-18 | 1954-05-13 | Reisholz Stahl & Roehrenwerk | Bump bench for stretching perforated pieces to pipes and hollow bodies |
DE2131874C3 (en) * | 1971-06-26 | 1984-07-19 | Benteler-Werke Ag, 4794 Schloss Neuhaus | Device for reducing pipe strings |
DE2249994C2 (en) * | 1972-10-12 | 1974-03-07 | Th. Kieserling & Albrecht, 5650 Solingen | Pulling and straightening device for bars or tubes |
US3855835A (en) * | 1973-12-10 | 1974-12-24 | B Tisdale | Apparatus for laying pipelines |
FR2320147A1 (en) * | 1975-08-08 | 1977-03-04 | Revigny Metallurg | STRETCHING, DRESSING, CUTTING AND POLISHING MACHINE |
FR2322675A1 (en) * | 1975-09-03 | 1977-04-01 | Babasov Miknail | Drawing and straightening device for cylindrical stock - using eccentric positioning of the drawing die in a rotor to produce bending forces |
-
1978
- 1978-07-01 DE DE2829058A patent/DE2829058C2/en not_active Expired
-
1979
- 1979-06-06 SE SE7904943A patent/SE447348B/en not_active IP Right Cessation
- 1979-06-18 IT IT49446/79A patent/IT1116888B/en active
- 1979-06-29 FR FR7917051A patent/FR2429626A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2429626A1 (en) | 1980-01-25 |
IT7949446A0 (en) | 1979-06-18 |
DE2829058A1 (en) | 1980-01-10 |
DE2829058C2 (en) | 1984-03-22 |
FR2429626B1 (en) | 1984-05-11 |
SE7904943L (en) | 1980-01-02 |
IT1116888B (en) | 1986-02-10 |
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Legal Events
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NUG | Patent has lapsed |
Ref document number: 7904943-3 Effective date: 19930109 Format of ref document f/p: F |