DE100004C - - Google Patents
Info
- Publication number
- DE100004C DE100004C DENDAT100004D DE100004DA DE100004C DE 100004 C DE100004 C DE 100004C DE NDAT100004 D DENDAT100004 D DE NDAT100004D DE 100004D A DE100004D A DE 100004DA DE 100004 C DE100004 C DE 100004C
- Authority
- DE
- Germany
- Prior art keywords
- tube
- mandrel
- pipe
- drawing plate
- ribs
- 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.)
- Active
Links
- 210000000614 Ribs Anatomy 0.000 claims description 8
- 230000003247 decreasing Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
- 230000035882 stress Effects 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
- 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 and 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 and tubes with decorated walls with guides parallel to the tube axis
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Bekanntlich kann beim Ziehen eines Stahlrohres zwischen einer Ziehplatte und einem Dorn stets nur eine ganz unbedeutende Verminderung in der Wandstärke in einem Ziehvorgang erreicht werden.As is known, when pulling a steel pipe between a drawing plate and a Thorn always only a very insignificant reduction in the wall thickness in one drawing process can be achieved.
Dies rührt daher, dafs die Reibung zwischen der Ziehplatte und dem Dorn, wenn eine gröfsere Verminderung versucht wird, die Zugfestigkeit des gezogenen Theiles des Rohres übersteigt, und dieses wird dann zerrissen, oder es wird der an die Zugangel angeschlossene Theil abgezogen.This is due to the fact that the friction between the drawing plate and the mandrel, if one A greater reduction is attempted, the tensile strength of the drawn part of the pipe exceeds, and this is then torn, or it becomes the one attached to the gates Part withdrawn.
Daher hat sich das Verfahren als verfehlt herausgestellt, wonach behufs Erzielung von Abweichungen im Innendurchmesser beim Ziehen ein sich verjüngender Dorn benutzt wird, dessen Stellung zur Ziehplatte man ändert, und zwar besonders bei Röhren, die durchweg nur geringe Wandstärke haben, da ein Versuch, mehr als eine unbeträchtliche Abweichung in der Wandstärke nach diesem Verfahren zu erzielen, das Reifsen des gezogenen Rohres oder das Abziehen des von der Angel gefafsten Endes desselben im Gefolge hat.Therefore, the process has been found to be unsuccessful, according to which to obtain Deviations in the inside diameter when drawing a tapered mandrel is used, the position of which in relation to the drawing plate is changed, especially in the case of tubes that consistently only have a small wall thickness, as an attempt more than a negligible deviation in wall thickness after this procedure achieve, the hooping of the drawn pipe or the pulling off of the hooked End of it has in its wake.
Um dem abzuhelfen, wird nach vorliegendem Verfahren zum Ziehen nahtloser Metallrohre mit Innenlängsrippen abnehmender Dicke ein Dorn benutzt, der durch die Ziehplatte mit dem Rohre fortgezogen wird und eine äufsere Form hat ähnlich derjenigen der gewünschten Innenform des zu ziehenden Rohres, während die Ziehplatte und das Rohr derart sind, dafs, wenn das Rohr durch die Platte gezogen wird, es gegen den Dorn geprefst wird und der Form des Domes sich anpafst, wenn das Rohr und der Dorn gemeinsam vorwärts gezogen werden.To remedy this, the present method for drawing seamless metal pipes with inner longitudinal ribs of decreasing thickness, a mandrel is used, which through the drawing plate with the tube is drawn away and has an external shape similar to that of the desired one Inner shape of the pipe to be drawn, while the drawing plate and the pipe are such that when the tube is pulled through the plate, it is pressed against the mandrel and conforms to the shape of the dome as the tube and mandrel are pulled forward together will.
Der Dorn besteht aus unzusammendrückbarem Material, am besten aus hartem Stahl.The mandrel is made of incompressible material, preferably hard steel.
Fig. ι zeigt ein gezogenes Metallrohr mit Innenlängsrippen abnehmender Dicke.Fig. Ι shows a drawn metal tube with inner longitudinal ribs of decreasing thickness.
Fig. 2, 3 und 4 zeigen Querschnitte nach Linie 8-8 bezw. 9-9 bezw. 10-10.Fig. 2, 3 and 4 show cross sections along line 8-8 respectively. 9-9 or 10-10.
Das Rohr hat innere Längsrippen a, die an den Enden des Rohres am dicksten sind, allmälig in die Wandstärke des Rohres übergehen und das Rohr an den Enden absteifen sollen, je nach den Beanspruchungen, welchen verschiedene Theile des Rohres unterliegen. Auf diese Weise kann auch irgend ein anderer Theil des Rohres durch Innenrippen versteift werden und die Rippen können auch durch das ganze Rohr sich erstrecken. Der zu benutzende Dorn enthält den Rippen entsprechende Längsnuthen.The tube has internal longitudinal ribs a, which are thickest at the ends of the tube, gradually merge into the wall thickness of the tube and are intended to stiffen the tube at the ends, depending on the stresses to which different parts of the tube are subjected. In this way any other part of the tube can also be stiffened by internal ribs, and the ribs can also extend through the entire tube. The mandrel to be used contains longitudinal grooves corresponding to the ribs.
In diesem Falle ist eine merkliche Abweichung in der Wandstärke des Rohres an verschiedenen Stellen seiner Länge vorhanden, die vermehrte Dicke im Rohr (Fig. 1) liegt in der Form der Rippen statt in der Verstärkung des Rohres an seinem ganzen Umfange.In this case, there is a noticeable deviation in the wall thickness of the pipe at different Places its length present, the increased thickness in the tube (Fig. 1) is in the form of the Ribs instead of reinforcing the tube over its entire circumference.
Wenn der Dorn mit dem Rohr vorgeht, so entsteht keine Reibung, wie in dem Falle, wo das Rohr zwischen zwei einander zugekehrten Flächen (der Ziehplatte und des Domes) hindurchgezogen wird, sondern nur die Reibung,When the mandrel goes forward with the pipe, there is no friction, as in the case where the tube pulled through between two facing surfaces (the drawing plate and the dome) becomes, but only the friction,
die aus dem Zusammendrücken des Rohres auf dem mitgehenden Dorn entsteht.which arises from the compression of the pipe on the accompanying mandrel.
Nachdem das Rohr mit seinem Dorn durch die Ziehplatte gezogen ist, mu.fs der Dorn "au? dem Rohr entfernt''Werden','' und "um dies zu erreichen, namentlich wenn das Rohr zwischen seinen Enden in der Wandstärke zu- und' abnimmt, mufs das Rohr, beispielsweise durch Hämmern, aufgeweitet werden, bis der den kleinsten Durchmesser besitzende" Theil vom Dorn abgezogen werden kann.After the pipe has been pulled through the drawing plate with its mandrel, the mandrel must "open". the pipe removed '' Will ',' 'and "to accomplish this, specifically if the pipe is between wall thickness increases and decreases at its ends, the pipe must, for example, pass through Hammer, be widened until the den the smallest diameter part of the The mandrel can be withdrawn.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE100004C true DE100004C (en) |
Family
ID=370857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT100004D Active DE100004C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE100004C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE954683C (en) * | 1944-01-18 | 1956-12-20 | Kabel Und Metallwerke Neumeyer | Process for the production of pipe barrels for hand and machine weapons |
EP0901402A1 (en) * | 1996-05-24 | 1999-03-17 | FM Precision Golf Manufacturing Corp. | Golf club shafts |
-
0
- DE DENDAT100004D patent/DE100004C/de active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE954683C (en) * | 1944-01-18 | 1956-12-20 | Kabel Und Metallwerke Neumeyer | Process for the production of pipe barrels for hand and machine weapons |
EP0901402A1 (en) * | 1996-05-24 | 1999-03-17 | FM Precision Golf Manufacturing Corp. | Golf club shafts |
EP0901402A4 (en) * | 1996-05-24 | 2005-02-09 | Fm Prec Golf Mfg Corp | Golf club shafts |
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