DE1602118A1 - Tube blanks and mandrels for the cold pilgrimage of seamless steel tubes with external longitudinal ribs - Google Patents
Tube blanks and mandrels for the cold pilgrimage of seamless steel tubes with external longitudinal ribsInfo
- Publication number
- DE1602118A1 DE1602118A1 DE1967M0076332 DEM0076332A DE1602118A1 DE 1602118 A1 DE1602118 A1 DE 1602118A1 DE 1967M0076332 DE1967M0076332 DE 1967M0076332 DE M0076332 A DEM0076332 A DE M0076332A DE 1602118 A1 DE1602118 A1 DE 1602118A1
- Authority
- DE
- Germany
- Prior art keywords
- mandrels
- longitudinal ribs
- rolling
- tube blanks
- seamless steel
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
- B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls
- B21C37/202—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls with guides parallel to the tube axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
Rohrluppen und Walzdorne zum Kaltpilgern von nahtlosen Stahl- rohren mit Außenlängsrippen; Das Patent ...... (Patentanmeldung M 75 115 Ib/7a) betrifft ein Verfahren zum Walzen nahtloser Stahlrohre mit zwei einander gegenüberliegenden Außenlängsrippen auf einem kegeligen Walzdorn von kreisförmigem Querschnitt. Die Rohrluppen werden bei freier Breitung im Walzspalt im ersten Teil des Walzvorgangs, der durch den ersten Abschnitt des Pilgerwalzkalibere bewirkt wird, auf ihre Endwanddicke ausgewalzt und Außenlängsrippen vorgeformte im zweiten Teil des Walzvorgangs, der durch den zweiten Abschnitt des Pilgerwalzkalibers bewirkt wird, wird die Endform der Außenlängsrippen bei unveränderter Rohrwanddicke fertiggewalzt.Tube blanks and mandrels for cold pilgrimage of seamless steel tubes with external longitudinal ribs; The patent ...... (patent application M 75 115 Ib / 7a) relates to a method for rolling seamless steel tubes with two opposing outer longitudinal ribs on a conical rolling mandrel with a circular cross-section. The tube blanks are rolled to their final wall thickness with free expansion in the roll gap in the first part of the rolling process, which is caused by the first section of the pilger roll caliber, and outer longitudinal ribs are preformed in the second part of the rolling process, which is caused by the second section of the pilger roll caliber, becomes the final shape the outer longitudinal ribs finish-rolled with unchanged pipe wall thickness.
Es hat sich als vorteilhaft erwiesene die Rohrluppen, die vorzugsweise im Strangpreßverfahren hergestellt werden, über ihre Länge an einander gegenüberliegenden Stellen im Innern mit , Wandverdickungen zu versehen. Diese Verdickungen liegen parallel zueinander. Für die Walzung werden die Rohrhippen über ein Führungs- stück mit angepaßter Profilierung auf die Walzdorne derart auf- geschoben, daB die Mitte der Wandverdickungen genau in der Walzebene liegt' d.h, daß ihre Zage mit der Mittellinie der Außenlängsrippen übereinstimmt. Durch die Anordnung der Wandverdickun» gen wird sichergestellt$ daB ausreichend Material für die Ausbil# dung der Außenlängsrippen vorhanden ist" auch wenn diese eine große Höhe aufweisen.It has proven to be advantageous to provide the tube blanks, which are preferably produced by the extrusion process, with wall thickenings over their length at mutually opposite points on the inside. These thickenings are parallel to one another. For rolling the tube hip over a guide are so pushed up piece with adapted profiling on the rolling mandrels, DAB is the center of the wall thickening exactly in the rolling plane, "that is, that their Zage coincides with the center line of the outer longitudinal ribs. Is gen by the arrangement of Wandverdickun »$ ensured DAB sufficient material for Ausbil # dung outside longitudinal ribs is present" even if they have a large amount.
Für die Walzung von Rohrluppen gemäß der Erfindung sind _Walzdorne besonders geeignet" die am Anstichende mit zum Auslauf. ende hin abnehmender Tiefe einander gegenüberliegende Abflachungen aufweisen.. Durch diese Ausbildung der Dorne wird erreicht" daß die Wandverdickungen in den Rohrluppen auf einen längeren Walzweg nicht oder wenig ausgewalzt werden" und daß das Material der Wand. verdickungen erhalten bleibt und zur Verfügung steht" wenn dieses Material für die Fertigwalzung der Außenlängsrippen benötigt wird.For rolling tube blanks in accordance with the invention are _Walzdorne particularly suitable "having the piercing end of the spout. End decreasing depth opposed flats .. Due to this design of the mandrels is achieved" that the wall bulges in the tube blanks on a longer Walzweg not or are rolled out little "and that the material of the wall. Thickenings are retained and available" when this material is required for the finish rolling of the outer longitudinal ribs.
Die Abflachungen erstrecken sich zweckmäßig über bis cris zwei Drittel der Walzdornlänge. Die Länge der Abflachungen ist abhängig vom Kegelwinkel der Walzdorne. Durch die Bemessung der Länge der Abflachungen kann die Höhe der Außenlängarippen beeinflußt werden.The flattened areas expediently extend over up to two thirds of the length of the rolling mandrel. The length of the flats depends on the taper angle of the mandrel. By dimensioning the length of the flats, the height of the outer longitudinal ribs can be influenced.
Die Zieichnung zeigt Ausführungsformen der Erfindung: t Fig. 1 ist ein Querschnitt durch eine Rohrluppe! Fig. 2 eine Seitenansicht eines Walzdorns und Fig. 3 der Schnitt A-A nach Fig. 2. The drawing shows embodiments of the invention: t Fig. 1 is a cross-section through a tube blank! FIG. 2 shows a side view of a rolling mandrel and FIG. 3 shows section AA according to FIG. 2.
Die Rohrluppe 1 nach Fig. 1 ist mit den Wandverdickungen 2 versehen. Der Waldorn 3 nach den Fig. 2 und 3 ist kegelig mit-Verjüngung tose Anstichende 3" zum Auslaufende hin ausgebildet. Vom Anstichende 3' aus erstrecken sich die einander gegenüberliegenden Abflachun gen 4 bis etwa $u einem Drittel des Walzdorns 3.. Die Flächen der Abflachungen 4 liegen etwa parallel zueinander, The tube blank 1 according to FIG. 1 is provided with the wall thickenings 2 . The Waldorn 3 according to FIGS. 2 and 3, is tapered tose with rejuvenation piercing end 3 "formed to the outlet end. From the tapping end 3 'from the opposite Abflachun extend gen 4 to about $ u one third of the rolling mandrel 3 .. The surfaces the flats 4 are approximately parallel to each other,
Claims (1)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1967M0075115 DE1279600B (en) | 1967-08-11 | 1967-08-11 | Process and roll calibration for rolling seamless tubes with external longitudinal ribs |
| DE1967M0076332 DE1602118A1 (en) | 1967-08-11 | 1967-11-23 | Tube blanks and mandrels for the cold pilgrimage of seamless steel tubes with external longitudinal ribs |
| DE1602118A DE1602118C3 (en) | 1967-08-03 | 1967-11-23 | Process for the production of steel pipes with external longitudinal ribs |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1967M0075115 DE1279600B (en) | 1967-08-11 | 1967-08-11 | Process and roll calibration for rolling seamless tubes with external longitudinal ribs |
| DE1967M0076332 DE1602118A1 (en) | 1967-08-11 | 1967-11-23 | Tube blanks and mandrels for the cold pilgrimage of seamless steel tubes with external longitudinal ribs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1602118A1 true DE1602118A1 (en) | 1970-04-23 |
Family
ID=39942779
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1967M0075115 Pending DE1279600B (en) | 1967-08-03 | 1967-08-11 | Process and roll calibration for rolling seamless tubes with external longitudinal ribs |
| DE1967M0076332 Granted DE1602118A1 (en) | 1967-08-03 | 1967-11-23 | Tube blanks and mandrels for the cold pilgrimage of seamless steel tubes with external longitudinal ribs |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1967M0075115 Pending DE1279600B (en) | 1967-08-03 | 1967-08-11 | Process and roll calibration for rolling seamless tubes with external longitudinal ribs |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE1279600B (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE938662C (en) * | 1951-10-19 | 1956-02-02 | Andre Huet | Process for the hot forming of a pipe with a circular inner cross-section for the purpose of producing any profile, e.g. B. of longitudinal ribs |
| DE910612C (en) * | 1952-06-21 | 1956-03-01 | Mannesmann Ag | Tube with external longitudinal ribs and process for its manufacture |
-
1967
- 1967-08-11 DE DE1967M0075115 patent/DE1279600B/en active Pending
- 1967-11-23 DE DE1967M0076332 patent/DE1602118A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE1279600B (en) | 1968-10-10 |
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