DE501953C - Clamping device for longitudinal seam welding machines for welding pipes or tubular workpieces - Google Patents
Clamping device for longitudinal seam welding machines for welding pipes or tubular workpiecesInfo
- Publication number
- DE501953C DE501953C DEM100843D DEM0100843D DE501953C DE 501953 C DE501953 C DE 501953C DE M100843 D DEM100843 D DE M100843D DE M0100843 D DEM0100843 D DE M0100843D DE 501953 C DE501953 C DE 501953C
- Authority
- DE
- Germany
- Prior art keywords
- welding
- clamping device
- longitudinal seam
- tubular workpieces
- pipes
- 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
- 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
- B21C37/08—Making tubes with welded or soldered seams
-
- 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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
Einspannvorrichtung für Längsnahtschweißmaschinen zum Schweißen von Rohren oder rohrförmigen Werkstücken Bei Längsnahtschweißmaschinen ist es bekannt, das in der Schweißrichtung hintere Ende des Werkstückes in einer aus einem doppelten Klemmb.ackenpaar bestehenden Einspannvorrichtung festzustellen, mittels deren der zur Durchführung des Schweißvorganges nötige Schweißspalt in seiner- Breite reguliert wird.. Das vordere Werkstückende ist dabei ebenfalls eingespannt. Besitzt das Werkstück eine Länge bis etwa zu i,2o m, wie solche z. B. für Faßmäntel gilt, so genügt eine Einspannvorrichtung in vorstehendem Sinne, um den Schweißspalt dem fortschreitenden Schweißvorgang entsprechend parallehzur Bewebungsrichtung der Schweißbrenner oder der` Elektrode einzustellen. Handelt es sich aber um die Schweißurig längerer rohrförmiger Werkstücke, z. B. langer Rohre mit großem Durchmesser und einer Blechstärke von etwa 3 bis 8 mm, so versagen. Einspannvorrichtungen der vorgenannten. Art aus dem Grunde, weil die aus dem Mrantelzurichten sich ergebende und sich beim Schweißen noch erhöhende Verwindung des Werkstückes, die die Schweißkanten in eine Schräglage zur Bewegungsrichtung der Schweiß.brenn.er oder der Elektrode bringt, bei langen Werkstücken nicht mehr mittels nur waagerecht verschiebbarer Klemmbacken. aufgehoben wenden kann. Denn eine waagerechte Bewegung entspricht nicht genau der Vei-windungs.bewegung der Blechkanten, die in einer Drehung um die Rohrachse besteht, und dieser Unterschied zwischen den beiden Bewegungen macht sich bei längeren Werkstücken, bei denen die Verwindung, am Umfang gemessen, erheblich wird, stark bemerkbar. ' Nach der Erfindung wirkt deshalb, wie die Zeichnung in einem Ausführungsbeispiel zeigt, der Träger a für die Einspannvorrichtung b, c um den Rohrmittelpunkt schwenkbar angeordnet, wobei sich diese Bewegung mittels eines Handrades g ausführen läßt und der Drehpunkt d des Trägers a senkrecht verschiebbar vorgesehen sein kann, um ihn in Anpassung an den jeweiligen Durchmesser des zu schweißenden Werkstückes f immer in den jeweiligen Rohrmittelpunkt bringen zu können. Schematisch zeigt die Abb. 3 das Werkstück f vor der Regulierung des Schweißspaltes und in der punktierten Linie die richtige Lage h der Schweißnaht. Der Pfeil gibt die Bewegungsrichtung des Schweißbrenners an.Clamping device for longitudinal seam welding machines for welding Pipes or tubular workpieces In longitudinal seam welding machines, it is known the rear end of the workpiece in the welding direction in one of a double Klemmb.ackenpaar existing clamping device to determine, by means of which the The width of the welding gap required to carry out the welding process is regulated is .. The front end of the workpiece is also clamped. Owns the workpiece a length up to about i, 2o m, such as z. B. applies to barrel coats, one is sufficient Clamping device in the above sense to keep the welding gap as it progresses Welding process parallel to the direction of movement of the welding torch or of the electrode. But when it comes to the welders, they are longer tubular Workpieces, e.g. B. long pipes with a large diameter and a sheet thickness of about 3 to 8 mm, so fail. Jigs of the foregoing. Kind of from the Reason because the resulting from the mantle to straighten and during welding still increasing twisting of the workpiece, which tilts the welding edges to the direction of movement of the welding torch or electrode, in the case of long Workpieces no longer by means of clamping jaws that can only be moved horizontally. canceled can turn. Because a horizontal movement does not exactly correspond to the twisting movement of the sheet metal edges, which consists in a rotation around the pipe axis, and this difference between the two movements occurs with longer workpieces where the Twist, measured by the circumference, becomes considerable, strongly noticeable. 'After the invention therefore acts, as the drawing shows in one embodiment, the carrier a for the clamping device b, c arranged to be pivotable about the center of the pipe, this movement can be carried out by means of a handwheel g and the fulcrum d of the carrier a can be provided so as to be vertically displaceable in order to adapt it on the respective diameter of the workpiece to be welded f always in the respective To be able to bring the pipe center point. Schematically, Fig. 3 shows the workpiece f before regulating the welding gap and in the dotted line the correct one Position h of the weld seam. The arrow indicates the direction of movement of the welding torch at.
Die Erfindung ist auch bei Schweißmaschinen mit bewegtem Werkstück und stillstehendem Werkzeug und gegebenenfalls auch bei kurzen Werkstücken anwendbar. Für die Verwendung der Erfindung zum Schweißen kurzer Werkstücke sei gesagt, daß solche hierbei zwar nicht erforderlich ist, aber immerhin den Vorteil bietet, die Bewegung der Klemmbacken in jedem Fall genau der erforderlichen Blechkantenbew egung anzupassen.The invention is also applicable to welding machines with a moving workpiece and with the tool at a standstill and, if necessary, can also be used for short workpieces. For the use of the invention for welding short workpieces it should be said that such is not necessary here, but at least offers the advantage that Movement of the clamping jaws in each case exactly the required sheet edge movement adapt.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM100843D DE501953C (en) | Clamping device for longitudinal seam welding machines for welding pipes or tubular workpieces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM100843D DE501953C (en) | Clamping device for longitudinal seam welding machines for welding pipes or tubular workpieces |
Publications (1)
Publication Number | Publication Date |
---|---|
DE501953C true DE501953C (en) | 1930-07-08 |
Family
ID=7324423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM100843D Expired DE501953C (en) | Clamping device for longitudinal seam welding machines for welding pipes or tubular workpieces |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE501953C (en) |
-
0
- DE DEM100843D patent/DE501953C/en not_active Expired
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