DE7331694U - Translation device for the automatic circumferential welding of pipes of any geometry, preferably with a polygonal cross-section - Google Patents

Description

Translation device for automatic circumferential welding of pipes of any Geometry, preferably with a polygonal cross-section.

The invention relates to a translation device for Automatic circumferential welding of pipes with any geometry, preferably with a polygonal cross-section.

The aim is to create a welding translation device which enables the circumferential welding of pipes with a potygonal cross-section to be carried out automatically and to keep the sweat bath in the plane over its entire course, this advantage in particular being achieved. Welding processes in which the measure, according to the invention, is to be used, should include all known in the technical field. are, in particular "TIG ¹¹ , (tungsten - in natural gas welding)," MIG "(metal - in natural gas welding)," PIASMA "and" MICRO-PLASMA "as well as variants.

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Sin typical application for the measure according to the invention can be seen in the welding of boxes, which contain nuclear fuel elements with a hexagonal cross-section. The problem of automatic perimeter welding of pipes with a polygonal cross-section has therefore already been extensively investigated.

It is known that a pipe with a polygonal cross-section is aich to rotate its axis by simply holding the welding device (literally: the welding torch) at a constant distance from the pipe: such a procedure performs however, to non-uniform states or conditions along the welding path due to the continuous Change of angle of the bath both with respect to the welding device and with respect to the vertical.

Furthermore, a method in which one works by hand has become known, which consists in in the plane weld the polygon sides and then manually weld the pipe fittings between two subsequent levels.

To improve these welding conditions tzn, an apparatus was designed that allowed in a completely automatic manner welds unequally constant and accurately plane conditions at an arbitrary geometry of the circular (square, rectangular, hexagonal, etc.).

Your invention should at least be based on the accompanying drawings are explained in more detail in which

Figure 1 schematically illustrates the work flow;

• · figure 2 • ··· ι ·· D · · · I 1 one
Invention. * · ■ · ■> ·· · ·
- 3 - is a
such Realization form
Device according to the

At the beginning of the welding process, the pipe is 1 ' and the welding torch or the device 2 * in position A; the pipe remains immobile and the welder begins to move parallel to the pipe side until it reaches position B. shift. At that moment the pipe begins to rotate on its own axis until a rotation of 360 ° / n in the direction shown at C is reached (N is the number of sides of the polygonal tube); at the same time the welding machine reverses its own direction of movement and changes its own speed if desired, so that position A again at the end of the tube rotation is reached. At this point the workflow for the second side of the polygonal tube begins.

During the welding process, the welding device-workpiece distance is kept constant by means of a suitable mechanical tool or an electromechanical system kept constant arc length.

The mechanical means by which it is possible to carry out the said movements can be of various types or all of a known type.

According to the generally held embodiment of the invention according to FIG. 2, an electric motor (not shown) transmits the movement by means of suitable gear wheels 1, which are always in engagement, on two shafts 3 and 4. The two shafts 3 and 4 come into effect alternately via two electrical couplings 5 and 6 respectively and move them by means of several B. Gear or gears 7 the worm 8 in rotation, wherein

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the latter in turn drives the carriage 9 for the welding device holder.

The stroke of the carriage is fixed by suitable lifting ends, not shown, and the speeds of movement that [^ are generally different in the two directions are determined by the gears 1 and 7.

The stroke end formation of the welding machine holder carriage can be such that the Yorrichtung for welding Pipes with a cross-section such as that of an irregular polygon (e.g. a rectangle) are made suitable will.

The synchronous behavior of the movement of the welding tool holder carriage and the hexagon rotation is possible in two different ways.

So it is possible to "" add two stepper motors synchronize, the first for the translation of the welding tool, the second for the rotation of the pipe serves.

It is also possible, mechanically, by introducing a third clutch or a freewheel device Combine carriage movement with the rotary movement of the pipe around its own axis.

With regard to a concise representation, the invention was explained using only a single embodiment; Changes and modifications within the scope of the invention are readily possible for a person skilled in the art.

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Claims (4)

TNG. COATING: LE1WAIzI) ......! '. D-8OOO MUNICH 4O BIHKATtBH STBASSB β TEtBFOIi SO 8914. DnTiicn Idnrxu - sncuim era. β -SMOc 4O AGIP HUCLBAEE November 14, 1977 G 73 31 694.6 Case 593 SGHOTZAgSPRUCHE 1. Circumferential welding equipment for the automatic Perimeter welding of a η-flat polygonal pipe Cross-section, with pipe holder, characterized by a welding tool holder carriage (9), the back tu: * can be moved; by one for a limited Rotary movement designed rotary drive for the tube holder of such a design that the tube (1 ') in one direction by an angle equal to 360 ° / n with each decrease of the Car is rotatable in the starting position. 2. Peripheral welding device according to claim 1, characterized by a rotatably mounted, screw (8) connected to learning carriage (9); one at one end of the worm (8) fixed gear (7) S a pair of on opposite sides of the worm (8) mounted shafts and gears (7-7) at the ends of these Shafts that mesh with the first-mentioned gear (7) and j through one of the shafts (3) in one, the other j of the shafts (4) rotating aniseed in the other direction ί as well as couplings between shafts and drive. POST CHECK ACCOUNT MONOH.BJI ISBO SO · SOO · DAVBRlSCBB HYtOTHEKBN-UNDWBCSSBL-BANK »lÜNCHBN 8910OOOSSO 7331694 04/27/78 r ■ - ■■■ ι 3. Perimeter welding device according to one of the preceding Addresses »characterized in that the Diameter of one of the shafts (3) fixed gear (1) different from the diameter of the other of the Shafts (4) fixed gear is such that the speed of rotation of the Sctmecke (8) in one direction is different from the speed of rotation in the other direction is. 4. Peripheral welding device according to claim 2, characterized gekennzeicla.net, daft the drive device a shaft driven by a motor (-), a second effectively with one of the clutches (5) driven shaft (3); a third operatively connected to the other coupling (6) Shaft (4) and a first set of constantly meshing gears (1; 1; 1 »1), which the driven shaft with connect the second shaft (3) for rotation in one direction and that a second scrim is constantly meshing Gears (7; 7> 7) connecting the driven shaft to the third shaft for rotation in the opposite direction. 7331694 27.0t, 78