SU1429927A3 - Continuous arbourless tube rolling mill - Google Patents

Abstract

The invention relates to a continuous tube rolling mill with grooved rolls which are arranged in series and are mounted in pairs, each offset by 90 DEG relative to the other, in chocks which can be adjusted relative to fixed supporting parts in order to change the rolling pass. Known rolling mills of this kind have roll stands in which the grooved rolls are mounted by means of their chocks. The disadvantage in known designs are the spaces between the roll stands resulting from their construction. Since the space affects the length of the mandrel bar required, the spaces should be kept as short as possible. It is the object of the invention to provide a simplified rolling mill with the narrowest possible spacing between the grooved rolls and great stability. To achieve the object, a box-shaped holding structure consisting of pairs (6, 7) of beams parallel to one another and to the axes of the rolls is proposed, each pair (6) of beams being connected at the ends to the adjacent pair (7) of beams, which is offset by 90 DEG in a parallel plane, and the chocks arranged between each pair (6 and 7) of beams being braced relative to the chocks (5) of the adjacent pair (6 or 7) of beams. <IMAGE>

Description

F1 / yr

1142

The invention relates to pipe-rolling production, in particular, to multicellular mills for rolling pipe rolling.

The purpose of the invention is to reduce the mass and size of the mill.

Figure 1 shows the camp, side view; 2 is the same cross section directly behind the overlapping slab; in FIG. 3, view A in FIG. 2; figure 4 - section bb in fig.Z on - section bb In fig.Z (without rolls); figure 6 - embedded mill rolls.

The mill contains a frame 1 with front 2 and rear 3 end plates, twin-roll blocks 4 with cushions 5, the supports for which are formed by pairs of cross-arms 6 and 7, which have a slope to

horizon and installed with an inclination of 90 relative to neighboring pairs of traverses. Between the end plates are horizontal parallel rods 8, passed through the holes or sleeves at the ends of the pairs of cross-arms. The traverse pairs form a box-like fastening structure for pillows and grooved rolls that are related in pairs to the traverse pair. The rolls have drive sleeves 9 at the ends.

Podzppki made in such a way that, in the case of Lenka. Rolling, they are adjacent to the neighbors. pillows without a gap and are supported on them in the rolling direction or in the opposite direction; and the pillows are equipped with known adjusting devices 10 for their movement} across the rolling direction for adjusting the caliber. The connection of the installation device with the pillows is achieved through a positive-locking connection 11, which allows the pillow to be extended parallel to the traverse pairs. On the end plate, stationary piston cylinders 12 are installed, which act on the pillows and tighten them during the rolling process with each other. The cylinders are released from the load for changing the cushions and therefore the cushions can be moved in the direction of removal. The cushions have protrusions 13 and move along the traverses of pairs in the corresponding grooves 14, which (FIG. 3) have a break 1 on the guide rails, so that they can be removed under the lugs from the rails. For this, the protrusions are of such dimensions that in the position of Q 5

0

five

0

five

0

five

0

five

the impulses pass through the breaks of the guide bars.

On fig.Z shows the installation of the rolls, i.e. pillows with rollers in a disassembled position, namely, two located one after another, offset by 90 relative to each other block.

The pillows adjoin each other directly and the stands, are reduced to pairs of traverses, and the adjacent pairs of traverses are combined into a force link, i.e., conventional rolling stands with transverse and side bars are not used. Only crossmembers, formed by pairs of cross-beams, are present, and side beams are made of crossbars of an adjacent set of calibrated rolls. At the same time, the dimensions of the pairs of traverses in the rolling direction correspond to the width of the pillows, and the position of the pairs of traverses is fixed due to the holes in the end plates in which the rods — tensioning elements — are installed and fixed.

The rolling forces resulting opposing forces are reliably perceived by adjacent cushions loaded by piston cylinders, so that, despite the simplification of the design, the rolling mill is highly stable.

The change of the rolls is simple, since the lateral cross-beams of the usual roll beds are absent, therefore the pillows are free from the side and, accordingly, they can be removed parallel to the traverse pairs 6 and 7. This can be done by automatic means for changing, and the box-like fastening structure is retained from interconnected steam traverse.

Claims (3)

Invention Formula 1 "A continuous tubeless rolling mill containing a frame with front and rear end plates, connecting plates horizontal parallel rods, stationary piston cylinders aligned with them and two-roll blocks located between the plates close to each other, in order to reduce weight and the dimensions of the mill, it is provided for each roller block with a pair of parallel, 31429  Traverses, each of which is installed in contact with the pillows of one roll and worn on two pants through sleeves, and the traverses of adjacent roller blocks are mutually perpendicular, like the axes of the rolls of these blocks, and form a box-shaped fastener along the structure for pillows. 2. The camp according to claim 1, about t l and h and y - y and with the fact that the pillows of each the roller unit is installed with the possibility of extension after loosening the fastening parallel to the pair of cross-arms and with a positive fit along the adjacent pairs of cross-arms, respectively, the end plates, 3. Stan POP.1, characterized in that. at least the middle pair of traverse mounted in contact with the frame. 7 5 1 VIZI and WB-B FIG. 6-6 FIG. five h