DE583201C - Process for the production of smooth double-pitched screws (helix) from thin strip - Google Patents
Process for the production of smooth double-pitched screws (helix) from thin stripInfo
- Publication number
- DE583201C DE583201C DEK124758D DEK0124758D DE583201C DE 583201 C DE583201 C DE 583201C DE K124758 D DEK124758 D DE K124758D DE K0124758 D DEK0124758 D DE K0124758D DE 583201 C DE583201 C DE 583201C
- Authority
- DE
- Germany
- Prior art keywords
- production
- helix
- thin strip
- double
- smooth double
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/12—Making helical bodies or bodies having parts of helical shape articles with helicoidal surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Electric Cables (AREA)
Description
Verfahren zur Herstellung glatter doppelgängiger Schnecken (Wendel) aus dünnem Band Während für die Herstellung eingängiger Spiralen, Schnecken oder Wendel aus Blechstreifen Walzverfahren bekannt sind, wurden doppelgängige Schnecken oder Spiralen bisher auf andere Weise angefertigt, z. B. durch Einschneiden in Rundeisenstangen (Schraubendoppelgewinde) mit beträchtlichem Werkstoffverlust oder durch Verwinden starker Flacheisenbänder (Spiralbohrer).Process for the production of smooth double-start screws (helix) from thin tape While for the production of catchy spirals, snails or Helix from sheet metal strips are known in the rolling process, double-thread screws were used or spirals previously made in other ways, e.g. B. by cutting into round iron bars (Screw double thread) with considerable loss of material or through twisting strong flat iron strips (twist drills).
Es wurde nun gefunden, daß sich das Walzverfahren auch auf die Herstellung von doppelgängigen Spiralen aus dünnen Bändern anwenden läßt. Wird ein bildsames Band von den ursprünglichen Abmessungen l X b X s beispielsweise mittels des in der Abbildung dargestellten Walzwerkes in seiner Längsrichtung so ausgewalzt, daß die Bandstärke s in der Mitte unverändert bleibt, sich aber nach den Bandrändern hin allmählich und gleichmäßig um das n-fache bis auf sIn verjüngt, so wächst bei unveränderlicher Breite b die Bandlänge l von der Bandmitte nach den Rändern hin gleichmäßig bis zum n-fachen auf n/1. Die gelängten Bandränder legen sich dabei zwangsläufig spiralig um die ungelängte Bandmitte herum, und es ist lediglich darauf zu achten, daß hiermit im gleichen Drehsinn begonnen werde. Im Beispielsfalle ist der Durchmesser der so entstandenen doppelgängigen Schraubenfläche gleich b; ihre Steighöhe wird von n bestimmt und ihre Drehachse fällt mit der Mittellinie des Bandes zusammen. Indessen lassen sich mach dem gleichen Verfahren mit geeigneten, gegebenen= falls veränderlichen Walzen- und Bandprofilen auch andere Schneckenformen herstellen, z. B. mit größerem oderkleinerem Durchmesser als b, solche mit Hohlseele, konische Doppelschnecken oder solche mit veränderlicher Steigung.It has now been found that the rolling process can also be applied to the production of double-threaded spirals from thin strips. If a malleable strip of the original dimensions l X b X s is rolled out in its longitudinal direction, for example by means of the rolling mill shown in the figure, so that the strip thickness s remains unchanged in the middle, but gradually and evenly around the n- times tapered down to sIn, with an unchangeable width b the band length l grows evenly from the band center to the edges up to n times to n / 1. The elongated tape edges are inevitably placed in a spiral around the unelonged tape center, and it is only necessary to ensure that this is started in the same direction of rotation. In the example case, the diameter of the double helical surface thus created is equal to b; its height of rise is determined by n and its axis of rotation coincides with the center line of the belt. In the meantime, other screw shapes can also be produced using the same process with suitable, possibly variable roll and strip profiles, e.g. B. with a larger or smaller diameter than b, those with a hollow core, conical twin screws or those with a variable pitch.
Führt das Strecken der Bandränder von der Randstärke s auf die Randstärke s/n in einem Walzgang zu ausführbaren Walzwerkabmessungen, so können in bekannter Weise statt eines mehrere Walzwerke hintereinander zu einer Walzenstraße geschaltet werden.Performs the stretching of the band edges from the edge thickness s to the edge thickness s / n in one rolling process to implementable rolling mill dimensions, so can in known Way instead of one several rolling mills connected one behind the other to form a rolling train will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK124758D DE583201C (en) | Process for the production of smooth double-pitched screws (helix) from thin strip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK124758D DE583201C (en) | Process for the production of smooth double-pitched screws (helix) from thin strip |
Publications (1)
Publication Number | Publication Date |
---|---|
DE583201C true DE583201C (en) | 1933-08-30 |
Family
ID=7245700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK124758D Expired DE583201C (en) | Process for the production of smooth double-pitched screws (helix) from thin strip |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE583201C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE947696C (en) * | 1952-09-21 | 1956-08-23 | Wurag Eisen Und Stahlwerke Ag | Method and device for producing coils with a thicker cross-section on the inside diameter |
-
0
- DE DEK124758D patent/DE583201C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE947696C (en) * | 1952-09-21 | 1956-08-23 | Wurag Eisen Und Stahlwerke Ag | Method and device for producing coils with a thicker cross-section on the inside diameter |
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