US3136185A - Manufacture of seamless tubes made of steel or the like - Google Patents

Manufacture of seamless tubes made of steel or the like Download PDF

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Publication number
US3136185A
US3136185A US57290A US5729060A US3136185A US 3136185 A US3136185 A US 3136185A US 57290 A US57290 A US 57290A US 5729060 A US5729060 A US 5729060A US 3136185 A US3136185 A US 3136185A
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Prior art keywords
tube
rolls
rolling
portions
rolled
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Expired - Lifetime
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US57290A
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English (en)
Inventor
Benteler Helmut
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.)
Benteler Deustchland GmbH
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Delta Kuehlschrank G M B H
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    • 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
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process

Definitions

  • Another object of the present invention is to provide a tube rolling process and apparatus which is capable of reducing and elongating a tube while maintaining the tube in cold condition at all times and while handling the tube in a fully continuous manner.
  • the present invention mainly consists of a tube rolling process which includes the step of passing a tube in cold condition through a series of sets of compression rolls each of which engages the tube While it is located at any one of the sets along a plurality of spaced arcuate portions which have a total length of at least about half the periphery vof the tube. Furthermore, between each pair of successive sets of compression rolls there is provided by the difference in the peripheral speeds of the rolls a stretch ou the tube which is greater than that required to compensate for the increase in the length of the tube between each pair of successive sets of compressing rolls.
  • the present vinvention mainly consists of a tube rolling apparatus which includes a plurality of rolls constituting a set of compression rolls, each of these rolls being formed with an annular groove having a central arcuate portion forming part of a circle and located nearer to the axis of the roll than lateral portions of the groove which respectively extend frorn the ends of the central portion thereof.
  • These lateral groove portions are concave, extend up to the outer surface of the roll, and merge smoothly into the central portion of the groove.
  • the plurality of rolls of each set are supported for rotation about their axes with these axes located in a common plane and with the rolls engaging each other at their outer surface portions which are located beyond the grooves formed therein, these grooves of each set of compression rolls cooperating with each other to form a passage having spaced arcuate portions, formed by the central portions of the groove, which form part of the same circle and havingy between these arcuate portions radial passage portions which extend radially beyondthe arcuate portions.
  • FIG. l is a partly schematic, longitudinal sectional elevational View of a tube rolling mill according tothe present invention.
  • FIG. 2 is a partly sectional elevational view on an enlarged scale, as compared to FIG. 1, taken along line II-II of FIG. l in the direction of arrows;
  • FIG. 2a is a plan view on an enlarged scale of the transmission between members shown in FIG. 2,r part of the structure of FIG. 2a being broken away to clearly illustrate the important details vof the structure illustrated in FIG. 2;
  • FIG. 3 is a schematic illustration of the arrangement of the successive sets of rolls accordingto the present invention.
  • FIG. 5 taken along line Vl-VI of FIG. 5 in the direcy tion of the arrows;
  • FIG. 7 is a transverse sectional View on an enlarged scale of a mandrel and tube as well as a pair of compressing rolls working on the tube;
  • FIG. 8 is a fragmentary, transverse, sectional View of a mandrel and tube and another embodiment of a set of compressing rolls acting on the tube;
  • FIG. 9 is a fragmentary sectional view taken along line IX--IX of FIG. 1 in the direction of the arrows and showing a mandrel and tube and only the parts of the compression rolls which act on the tube;
  • FIG. 10 is a View similar to FIG. 9 taken along line X-X of FIG. 1 in the direction of the arrows;
  • FIG. 11 is a view similar to FIG. 9 taken along line XI-XI of FIG. l in the direction of the arrows;
  • FIG. 12 is a view similar to FIG. 9 taken along line XIIXII of FIG. l in the direction of the arrows;
  • FIG. 13 is a View similar to FIG. 9 taken along line XIII-XIII of FIG. 1 in the direction of the arrows;
  • FIG. 14 is a view similar to FIG. 9 taken along line XIV- XIV of FIG. 1 in the direction of the arrows.
  • the elongating mill shown therein is composed of a plurality of roll assemblies A, B, C, D, and each of these assemblies includes two sets of compressing rolls and one set of rounding rolls.
  • the sets of rolls a, b, d, e, g, h, k, and l are sets of compressing rolls
  • the sets of rolls c, f, i, m are sets of rounding rolls.
  • each of the above assemblies which are arranged one behind the other are composed of a pair of sets of compressing rolls located one behind the other and followed by a set of rounding rolls.
  • FIG. 1 are shown as if they all included rolls turnable about axes normal to the plane in which FIG. 1 is taken. Actually, this is not the case, since each set of rolls is angularly displaced with respect to the preceding and the following set of rolls, as is apparent from FIG. 3 where the succeeding set of rolls are schematically illustrated.
  • each set of compressing rolls 2 is driven by an electric motor 1.
  • the motor I may be an adjustable rotating field induction motor.
  • a separate motor is provided to drive each set of compression rollers, while each set of rounding rolls may be driven from the same motor which drives the preceding set of compression rolls.
  • the motor 1 drives the compression rolls 2 through a clutch 3 which transmits the drive to a bevel gear drive 4 which in turn transmits the drive to a telescoped shaft arangement S.
  • the upper end of this telescoped shaft arrangement 5, as viewed in FIG. 2 is connected to a second bevel gear drive which cooperates directly with a reduction gear unit 8, as is shown on an enlarged scale in FIG. 2a.
  • the reduction gear assembly 8 operates a further pair of gears 9a and 9b, and these gears are connected through universal joints with shafts 10a and 10b, respectively, which are in turn connected through universal joints with the compression rolls 11a and 11b.
  • the pair of bevel gears 6 drive the pair of bevel gears 7 which in turn transmit the drive to the reduction gear assembly 8.
  • the pair of compression rolls 11a and 11b have a relatively small diameter and are in engagement with a pair of larger rolls provided for each of the compression rolls.
  • the compression roll 11b engages at its side directed away from the roll 11a a pair of larger rolls 13a and 13b, while the compression roll 11a engages at its side ldirected away from the compression roll 11b the pair of larger rolls IZa and 12b.
  • the free ends of these rolls 12a, 12b, 13a, 13b are turnable in bearings which form part of housings 17a and 17b, the housings 17a being shown at the left of FIG. 5 connected to the .left ends of the rolls 12a-13b while the housings 17b at the right side of FIG.
  • each pair of rounding rolls 16a and 16h have their free ends turnably supported in additional housings 17a and 1'7b which cooperate in the same way with spindles 18a and 18b.
  • spindles 18a and 18h they are fixed to gears I9 and 19a which serve to turn the spindles.
  • a hand wheel 2t) is fixed to the gear 19a so that when the hand wheel 20 is turned the housings 17a and 17b will shift so as to locate the rolls 16a and 1Gb at a desired distance from each other in the case of FIG. 4 and so as to locate the rolls 11a and 11b at a desired distance from each other in the case of FIGS. 5 and 6.
  • FIGS. 5 and 6 The structure of FIGS.
  • 4-6 is identical for all of the sets of compression rolls and rounding rolls.
  • the rounding rolls are respectively driven by a pair of shafts 21a and 2lb connected to the rolls through universal joints, and these shafts 21a and 2lb are connected through additional universal joints as well as bevel gear and reduction gear assemblies to the motor of the compression roll set which is located just preceding the particular rounding roll set.
  • FIG. 3 schematically illustrates the arrangement of compression and rounding rolls when the cold working takes place on a cylindrical mandrel having a uniform diameter along its entire length.
  • the Vangular displacement of the several sets of rolls with respect to each other is diagrammatically shown in FIG. 3a.
  • FIG. 3a shows the angular positions of the sets of rolls with respect to each other where the rst set of compression rolls a is indicated with a vertical line, as shown in FIG. 3a.
  • the rolls of the first assembly A have their angular positions indicated in the outermost circle of FIG. 3a, while the angular positions of the succeeding assemblies B, C, D are shown in FIG.
  • FIGS. 3 and 3a the pair of compression rolls of the second set of compression rolls of each assembly is displaced by with respect to the first set of compression rolls of each assembly.
  • the set of rounding rolls of each assembly is displaced by 45 with respect to the compression rolls.
  • the sets of compression rolls of one assembly are angularly displaced with thesets of compression rolls of the next assembly by either 22.5 or 45".
  • the angular positions of the sets of rolls of the first two assemblies A and B are further illustrated in FIGS. 9-14.
  • the successive sets of rolls are operated at peripheral speeds greater than that of the next preceding set of rolls so as to compensate for the elongation of the tube due to the reduction in cross-section and wall-thickness and to the advance of the tube at each set of rolls. Furthermore, in accordance with the present invention, the successive sets of rolls are operated at a peripheral speed even higher than this peripheral speed.
  • the peripheral speed of the second set of compression rolls of ⁇ each assembly is higher than that of the first set of compression rolls of each assembly by an amount greater than that required to compensate for the increase in length of the tube so that the pairs of compression rolls of each assembly provide a positive tension and stretch in the portion of the tube which is located between each pair of compression roll sets at any given instant.
  • the increase in the peripheral speed of the second set of compression rolls of each assembly, depending upon the linear speed of the tube and the cross section thereof will be approximately 2-5% more than the speed of the second set of rolls which would be provided if a positive tension were not applied to the tube during passage thereof through the elongating mill of the invention.
  • each pair of compression rolls 11a and 11b is provided with an annular groove.
  • Each of the rolls 11a and 1lb has such a groove formed in its outer face, and this groove has in a diametral plane an inner central portion located nearer to the axis of the roll than the lateral portions of the groove which respectively extend beyond the ends of the central portion.
  • these lateral groove portions are concave and merge smoothly into the central portion of the groove.
  • the pair of rolls 11a and 11b cooperate with each other to forma passage having the configuration shown in FIG. 7, and as may be seen from FIG.
  • this passage has a pair of opposed arcuate portions forming part of the same circle and between these arcuate portions a pair of lateral passage portions which extend radially beyond the arcuate portions.
  • each pair of rolls 11a and 11b will engage the tube 14 along a pair of arcuate peripheral portions which form part of the same circle and which are spaced from each other in order to leave between these arcuate portions a pair of portions of the tube 14 which are not compressed by the rolls.
  • the second set of compression rolls of each of the assemblies A-D had a peripheral speed greater than the rst set by an amount only sufficient to compensate for the increase in length of the tube between each pair of successive compression rolls, the elongation of the tube would still provide a tensile force at the portions'of the tube which are not compressed which would be capable of stretching these portions, but at the regions vof the tube portions which are not compressed and which are located next to the compressed portions of the tube there would be caused by the rolls 11a and 11b due to the reduction of the Wall thickness of the tube an increase in the only to an extremely small extent.
  • the second set of compression rolls of each assembly is driven at a peripheral speed slightly greater than that required to compensate for the increase in length of the tube resulting from the reduction in cross section thereof, and this increased increment of peripheral speed positively stretches the tube at the portions thereof next to the compressed portions of the tube, and the stretching of the tube at these portions is suicient to cause the material of the tube to be displaced only longitudinally of the tube and an increase in the peripheral length of the tube at a part thereof engaged by the compression rolls at any given instant is avoided in this way. Furthermore, the increased speed of the second set of compression rolls of each assembly augments the longitudinal stretching of the uncompressed parts of the' tube and reduces the resistance of the tube to deformationrat the regions of the tube which are not actually compressed by the rolls.
  • FIG. 8 illustrates an embodiment of the invention where each set of compression rolls includes three rolls 22a., 22b, 22C which have turning axes located in a common plane and displaced from each other by These rolls are also formed with annular grooves of substantially the same conguration as the grooves of the rolls 11a and 11b although they are of a smaller size.
  • each of the grooves of the rolls 22a-22e has a central arcuate portion forming part of a circle and extending in the example shown in FIG. 8 through an angle of approximately 70.
  • the tube 14 in the embodiment of FIG. 8 will be engaged along three spaced arcuate portions forming part of the same circle and having a total arcuate length of 210.
  • the grooves of the several rolls form radially extending passage portions which extend beyond the arcuate portions of the grooves which form part of the same circle and which provide spaces in which portions of the tube 14 may be located without being compressed, these portions of the tube 14 being, however, longitudinally stretched in the manner described above.
  • the portions of the tube which are actually engaged and compres-sed by the compression rolls have a tensile strength which is substantially greater than that of the uncompressed portions of the tube which are not engaged by the compression rolls. Because of the smaller tensile strength of these uncompressed elongated portions of the tube, the tensile force which is provided by the sets of compression rolls is great enough to exceed the yield point of the uncompressed portions of the tube so as to provide a stretch and an elongation of these uncompressed portions of the tube.
  • the temperature of the tube is maintained lower than 150 C. and preferably lower than 100 C.
  • the major part of the heat generated in the tube during the Working thereof is carried Vaway by the rolls which engage the tube as Well as by the mandrel. If insucient heat is carried away by the rolls and the mandrel, then the tube may be cooled with a positive cooling means during the rolling thereof.
  • the rolls may be cooled in their interior portions in any suitable manner or the exterior of the tube may have a cooling liquid sprayed thereon, or both of these expedients may be resorted to simultaneously, Where necessary.
  • the tube placed in the mill of the invention was made of steel and had a tensile strength of 35 kg./mm.2, and this tube had an elongation of approximately 30-3570.
  • This tube had an exterior diameter of 25 mm. and a wall thickness of 2.5 mm.
  • the tube was rolled in the four assemblies, A, B, C, D while using a mandrel located within the tube and moving with the same through the rolls. This mandrel together With the rolls resulted in a nished tube whose outer diameter was mm. and whose wall thickness was 0.8 mm.
  • the reduction in cross section of the tube was distributed among the several assemblies as follows:
  • the reduction in cross section was 33%, the first set of compression rolls a providing a cross section reduction of 19% and the second set of compression rolls b providing a cross section reduction of 18.2%.
  • the reduction in cross section of the tube was 30.2%, and the rst set of compression rolls d provided a cross section reduction of 17.3% while the second set of compression rolls e provided a cross section reduction of 15.6%.
  • the third assembly C the cross section of the tube was reduced 27.3%, and the rst set of compression rolls g provided a reduction of 15.4% while the second set of compression rolls h provided a reduction of 14.4%.
  • the cross section of the tube was reduced 25.8%, and the rst set of compression rolls k provided a reduction of 13.9% while the second set of compression rolls l provided a reduction in cross section of 12.7%.
  • the entire reduction in the cross section produced by the entire mill was approximately 74%.
  • the finished tube after leaving the mill had a tensile strength of 65 kg./mm.2 and an elongation of approximately 6-8%.
  • the finished tube can be again rolled in a similar manner with similar apparatus without the mandrel, if desired, so as to have its cross section reduced still further. In this way it is possible to obtain tubes having an inner diameter of approximately 4 mm. and smaller.
  • the process of the invention it is possible to provide accurate steel tubes in cold condition of such small dimensions as could only be obtained heretofore by cold drawing of the tubes after hot rolling thereof.
  • the process of the invention is particularly suitable for the manufacture of tubes where the tube at the beginning has an outer diameter of less than approximately mm.
  • the tube which is worked on is preferably provided in its interior with a mandrel of uniform diameter and cylindrical cross section which moves with the tube through the mill. During such rolling of the tube the wall thickness thereof decreases.
  • the mandrel is not used, and in this way it is possible to provide tubes having an inner diameter of less than 4 mm.
  • a great advantage of the process and apparatus of the invention resides in the speed of movement of the tube with the process and apparatus of the present invention.
  • it is possible to provide further reductions in cross section by moving the tube through several passes through additional mills which further reduce the cross section of the tube, and between such a plurality of passes the tube may be annealed.
  • a process for cold rolling of a small diameter steel tube comprising the steps of passing a steel tube having an inner diameter of between 10 and 20 mm. in cold condition with an elongated cylindrical mandrel bar of uniform cross section and a diameter substantially smaller than the inner diameter of the tube located in the interior of said tube along a plurality of successive rolling stations, and rolling said tube at each of said rolling stations along a plurality of spaced arcuate portions distributed about the axis of the tube and forming part of a circle concentric to said axis and having a total peripheral length about said axis greater than one half of the periphery of the tube so as to compress said spaced arcuate portions against said mandrel while simultane- ⁇ ously leaving between said thus compressed rolled arcuate portions a plurality of irl-between tube portions which are not subjected to rolling and thus are uncompressed and which are stressed in longitudinal direction of the tube by the elongation of the tube due to said arcuate stations thereof being rolled, said spaced arcuate portions
  • a process for cold rolling of a small diameter steel tube as deiined in claim 1 in which said tube is rolled at a rolling speed of over 120 meters per minute and in which said positive stretch is great enough to subject said iii-between tube portions to tension forces exceeding the yield point of the cold tube material.
  • a process for cold rolling of a small diameter steel tube comprising the steps of passing a steel tube having an inner diameter of less than mm. in cold condition and with the interior of the tube left empty along a plurality of successive rolling stations, and rolling said tube at each of said rolling stations along a plurality of spaced arcuate portions distributed about the axis of the tube and forming part of a circle concentric to said axis and having a total peripheral length about said axis greater than one half of the periphery of the tube so as to compress said spaced arcuate portions While simultaneously leaving between said thus compressed rolled arcuate portions a plurality of in-between tube portions which are not subjected to rolling and thus are uncompressed and which are stressed in longitudinal direction of the tube by the elongation of the tube due to said arcuate stations thereof being rolled, said spaced arcuate portions being rolled at any one of said rolling stations being angularly displaced with respect to the spaced arcuate portions being rolled at the preceding and at the following rolling station, said rolling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)
US57290A 1955-05-17 1960-09-20 Manufacture of seamless tubes made of steel or the like Expired - Lifetime US3136185A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DED20477A DE1017122B (de) 1955-05-17 1955-05-17 Verfahren und Vorrichtung zur Herstellung von Stahlrohren
AT196333T 1956-04-27

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US3136185A true US3136185A (en) 1964-06-09

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US57290A Expired - Lifetime US3136185A (en) 1955-05-17 1960-09-20 Manufacture of seamless tubes made of steel or the like

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US (1) US3136185A (pl)
AT (1) AT196333B (pl)
BE (1) BE547866A (pl)
CH (1) CH345858A (pl)
DE (1) DE1017122B (pl)
FR (1) FR1153322A (pl)
GB (1) GB805598A (pl)
NL (1) NL207167A (pl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308644A (en) * 1963-12-02 1967-03-14 Mannesmann Meer Ag Drive for tube reduction mills
US3945234A (en) * 1975-01-02 1976-03-23 Rolf Steinbock Tandem rolling mill arrangement
US4094178A (en) * 1976-03-08 1978-06-13 Western Electric Co., Inc. Methods for continuous extrusion
US4212177A (en) * 1978-03-27 1980-07-15 Western Electric Company, Inc. Apparatus for continuous extrusion

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1175635B (de) * 1958-03-14 1964-08-13 Triva Andersen & Co Walzwerk mit mehreren, nacheinander wirkenden Walzenpaaren
NL298197A (pl) * 1958-06-13
DE1151237B (de) * 1959-07-22 1963-07-11 Kronprinz Ag Verfahren zum kontinuierlichen Herstellen von Nahtrohren mit genauen Durchmessern
DE1232094B (de) * 1961-05-13 1967-01-12 Kocks Gmbh Friedrich Kontinuierliche Gerueststaffel zum Warmwalzen, insbesondere von Knueppeln, Stab- undFeineisen
DE1286491B (de) * 1963-08-10 1969-01-09 Siemag Siegener Masch Bau Walzgeruest mit einem die Walzen lagernden Staenderpaar oder Staenderrahmen
WO1991001824A1 (fr) * 1989-08-03 1991-02-21 Tubemill S.A. Dispositif elongateur-egalisateur de corps creux ronds destines a la fabrication de tubes sans soudure
US5218851A (en) * 1991-06-21 1993-06-15 Kawasaki Steel Corporation Mandrel mill capable of preventing stripping miss
DE4339228C1 (de) * 1993-11-15 1995-01-05 Mannesmann Ag Mehrgerüstige Walzstraße
JP5062522B2 (ja) * 2007-05-31 2012-10-31 住友金属工業株式会社 マンドレルミル及び継目無管の製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1858990A (en) * 1928-04-16 1932-05-17 Globe Steel Tubes Co Method of and means for rolling seamless tubing
US1888607A (en) * 1929-04-06 1932-11-22 Nat Tube Co Method of making seamless tubes
US1926237A (en) * 1928-06-30 1933-09-12 Babcock & Wilcox Tube Company Method of and apparatus for making seamless tubes
US1934844A (en) * 1932-08-06 1933-11-14 Diescher Tube Mills Inc Method of sinking tubes
US2041937A (en) * 1934-10-27 1936-05-26 Alfina Immobilien Finanzierung Tube rolling process
US2085968A (en) * 1933-12-28 1937-07-06 Schloemann Ag Tube rolling method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE170783C (pl) *
NL37171C (pl) * 1931-04-04
DE635015C (de) * 1932-09-10 1936-09-08 Fritz Kocks Dr Ing Verfahren zum Auswalzen von Hohlkoerpern
DE634384C (de) * 1933-03-29 1936-11-06 Guenther Lobkowitz Kontinuierliches Walzwerk
US2074714A (en) * 1934-08-25 1937-03-23 Gustaf L Fisk Method of sizing round bars, wire, tubes, and the like
GB447988A (en) * 1934-12-24 1936-05-29 Tube Prod Ltd Improvements relating to the manufacture of steel and other metal tubes
US2503512A (en) * 1946-08-02 1950-04-11 Nat Tube Co Cold-worked pipe and method of obtaining the same
US2642763A (en) * 1947-03-26 1953-06-23 Finn B Abramsen Cross rolling mill
AT168279B (de) * 1947-12-23 1951-05-10 Alberto Calmes Verfahren und Walzwerk zur Herstellung von nahtlosen Rohren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1858990A (en) * 1928-04-16 1932-05-17 Globe Steel Tubes Co Method of and means for rolling seamless tubing
US1926237A (en) * 1928-06-30 1933-09-12 Babcock & Wilcox Tube Company Method of and apparatus for making seamless tubes
US1888607A (en) * 1929-04-06 1932-11-22 Nat Tube Co Method of making seamless tubes
US1934844A (en) * 1932-08-06 1933-11-14 Diescher Tube Mills Inc Method of sinking tubes
US2085968A (en) * 1933-12-28 1937-07-06 Schloemann Ag Tube rolling method
US2041937A (en) * 1934-10-27 1936-05-26 Alfina Immobilien Finanzierung Tube rolling process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308644A (en) * 1963-12-02 1967-03-14 Mannesmann Meer Ag Drive for tube reduction mills
US3945234A (en) * 1975-01-02 1976-03-23 Rolf Steinbock Tandem rolling mill arrangement
US4094178A (en) * 1976-03-08 1978-06-13 Western Electric Co., Inc. Methods for continuous extrusion
US4212177A (en) * 1978-03-27 1980-07-15 Western Electric Company, Inc. Apparatus for continuous extrusion

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Publication number Publication date
FR1153322A (fr) 1958-03-05
GB805598A (en) 1958-12-10
BE547866A (fr) 1956-11-16
DE1017122B (de) 1957-10-10
CH345858A (de) 1960-04-30
AT196333B (de) 1958-03-10
NL207167A (pl) 1900-01-01

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