DE1052346B - Roll stand, especially for welding mills - Google Patents

Description

The continuous production of welded pipes takes place today in plants that essentially consist of one Deformation and a welded part exist. The deformation path is made up of a series of one behind the other arranged scaffolding. These have the / task of gradually closing the incoming tape To form slotted tubes. These stands, which are usually equipped with two rollers, thus form an essential one Part of such a facility. The first task when building such a system is therefore to design the scaffolding in such a way that that they require the lowest possible investment costs. From the operational side, too, of course greatest economic efficiency required. In order to achieve this, it must be ensured that the conversion times are as short as possible be short. These demands on the scaffolding structure have only been partially met so far. The use of so-called interchangeable stands probably allows the conversion time when moving from one to a different tube size or when replacing worn calibers with new ones as short as possible keep. In this case, a number of reserve scaffolding are necessary, so that this solution also the due to the highest investment costs. This construction principle is only used if it is for a single one Scaffolding costs are relatively low, so z. B. in tube reducing mills. Both heavy scaffolding for plants for the production of welded pipes is therefore one to another Construction principle and has stored the rollers in chocks to then these together with the Insert the required spacers one after the other in the scaffolding stand and insert the latter through a To close the crosshead by means of strong screw connections. With this construction principle there is probably a reserve for the most expensive part, namely for the scaffolding stand or stands, saved, but this results in the largest renovation times. To reduce this, you have the chocks with the rotatably mounted in them Rollers and the spacers inserted between these chocks are already closed united in one structural unit. If the latter could absorb the rolling pressure, the scaffolding stands it is lighter, but the units to be installed are heavier and, above all, more difficult to handle.

In order to avoid the disadvantages of using these three construction 4-5 principles and to achieve an optimum in terms of system costs on the one hand and the conversion times on the other hand, it is now proposed to use a roll stand, especially for so-called welding mills, of which the roll-supporting, superimposed chocks in each of the two Scaffolding frames are combined to form a unit that can be lifted in and lifted out after the frame cross-head has been set aside, to be carried out according to the invention in such a way that the over-roll stand,
especially for welding rolling mills

Applicant:

Friedrich Kocks G. mb H.,
Düsseldorf, Blumenstr. 30th

Dr.-Ing. Friedrich. Kocks, Wermelskirchen,
and Karl-Hans Staat, Düsseldorf,
have been named as inventors

Chocks lying on top of one another are connected to a structural unit via spacers using lag screws which is rigidly enclosed between the lower support and the Ouerhaupt via spacers. It is assumed that the scaffold stand (s) with a fold-out crosshead is known per se execute, to provide spacers between the chocks supporting the roller and a rigid one Bracket for the upper and lower chock, including the spacer between the lower support and the To use crosshead with the interposition of an upper, adjustable spacer and finally also to arrange lower spacers in connection with closed structural units.

The scaffolding according to the invention differs from these known designs in that that the assembly of the chocks carrying the rollers with those between them Spacers by connecting with relatively light screws happens. The latter have only the task of the individual parts of the structural unit, namely the chocks and those arranged between them To hold spacers together for installation and removal. After their rigid installation in the The roller stands do not absorb the roller pressure when they are put into operation. Rather, it happens through that Ouerhaupt through the roller stand. In this way, the object on which the invention is based is achieved solved in a particularly simple way.

According to a further feature of the invention, the roll stand is further improved in that the Ouerhaupt each frame about a pivot axis perpendicular to the plane through the roller axis via lever arms can be folded out by means of a power drive, and that the pivot axis to the resultant of the force application of the upper spacer on its crosshead

809 769 / 20Φ

Claims (3)

is set, so that the rolling pressure causes a moment opposite to the unfolding direction of rotation, which is intercepted by stops on the crosshead. In the drawing, an embodiment of the roll stand according to the invention is shown. It shows Fig. 1 and 2 a front view of the frame with different positions of the Ouerhäupter seen from the inlet side, partially in section, Fig. 3 is a side view of the frame seen from the left and ίο Fig. 4 the view of a roller mounted in the chock. The roll stand consists of the two frames 2, 3 resting on the base 1 and the two crossheads 4, 5. The two rollers 6, 7 are rotatably mounted in the chocks 8, 9,10,11, which with intermediate pieces 12,13 through the eye bolts 14,15 (Fig. 3 and 4) are combined to form a self-contained structural unit. This structural unit is held rigidly in the scaffolding frame 2, 3 by means of adjustable spacers 29, 30 supported against the outer heads 4, 5 and lower, non-adjustable spacers 31, 32. Two piston drives 16, 17 are attached to each of the two scaffolding frames 2, 3, the piston rods 19, 20 of which engage the joints 22, 23 of lever arms 25, 26 which are mounted in axes 27, 28 of the scaffolding frames 2, 3 and with the outer heads 4, 5 are connected in such a way that when the piston drives 16, 17 pivotable about the axes 18, 21 are actuated, the crossheads 4, 5 can execute a pivoting movement about the axes 27, 28. When the rolls are changed, the crossheads 4, 5 of the frame are unfolded by the piston drives 16, 17 from the position shown in FIG. 1 into the position shown in FIG. 2, which allows the rolls 6, 7 including the structural units forming their bearings to lift out the scaffolding and insert a previously prepared new structural unit into the scaffolding in its place. The lever arms 25, 26 are mounted on the scaffold frame 2, 3 after the scaffold interior to the resultant of the force application of the spacers 29, 30 on the crossheads 4, 5 and these are intercepted by stops, so that the rolling pressure exerted in the direction of the arrows Piston drives and lever arms relieved. Patent claims: 1. Roll stand, in particular for welding rolling mills, the rollers of which are superimposed Chocks in each of the two scaffolding frames to one after setting the frame crosshead aside closed unit that can be lifted in and out are combined, characterized in that the stacked chocks (8, 10 or 9, 11) over spacers (12 or 13) Lag screws (14,15) are connected to form a unit that is between the lower support and the crosshead (4 or 5) is rigidly enclosed via spacers (29, 31 or 30, 32). 2. Roll stand according to claim 1, characterized in that the crosshead (4 or 5) of each frame around a pivot axis perpendicular to the plane through the rolling axes via lever arms (25 resp. 26) can be folded out by means of a power drive (16 or 17). 3. Roll stand according to claim 2, characterized in that the pivot axis to the resultant of the force applied by the upper spacer (29 or 30) to its crosshead (4 or 5) is, so that the rolling pressure is counter to the unfolding direction of rotation, intercepted by stops Moment at the crosshead. Considered publications:
German Patent Nos. 384 010, 435 391, 489; French Patent No. 905 008;
U.S. Patent No. 2,098,989. 1 sheet of drawings © 809 769 / 2Ot 3.59