DE2456782A1 - METHOD AND DEVICE FOR LEVELING PROFILE STEEL - Google Patents

Description

Dipl.-Ing. H. Sauerland · Dr.-lng. Π. König · Dipl.-Ing. K. Bergen

Patent Attorneys · 4Odo Düsseldorf ao · Cecilienallee 76 · Telephone

29ο November 1974 29 781 B

NIPPON STEEL CORPORATION No ₀ 6-3, 2-chome, Ote-machi, Chiyoda-ku, Tokyo, Japan

"Method and device for straightening profile steel"

The invention relates to a method for straightening profile steel and a device for carrying it out this procedure.

In contrast to flat steel, a profile steel has a relatively complicated cross-sectional shape and experiences according to the Hot rolling and cooling peculiar deformation or warping.

Section steel is used extensively in the building and shipbuilding industries, with straightness and dimensional accuracy being important requirements for such applications; Due to the increasing automation (numerical control USW ₀ ) of the processing machines in the past few years, increased requirements have been placed with regard to the straightness and shape quality of profile steel To give quality,

In known straightening machines for profiles, the straightening rollers in two rows, one row below the other row above, installed offset to one another, see above

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that there is a zigzag arrangement. Also are Guide rollers are provided, the axes of which are arranged vertically and the lateral movements of the to Check the material being processed on the infeed and outfeed side of the roller straightener.

In these known roller straightening machines, upper and lower straightening rollers are provided with calibres that the Cross-sectional shape of the goods are adapted; the straightening rollers are installed in such a way that they can be used both in a vertical position and are adjustable in the axial direction.

With these known roller straightening machines, as mentioned above, positive and negative curvatures in in the vertical direction must be set sufficiently strong to obtain the desired directional effect in this direction, however, this cannot be sufficient in the horizontal direction perpendicular to the direction of movement of the goods Straightening effect can be achieved. This is due to the fact that, for example, in a profile steel, which consists of two mutually perpendicular legs of different lengths and a section with high rigidity in the lateral directions (right and left) with strong bends in these Has directions, an adjustment and alignment of the straightening rollers in the axial direction for the purpose of bending leads to the fact that the material to be treated is caused by repulsive forces due to the rigidity of the material gets out of the caliber line of the straightening roller group and shifts in the axial direction of the straightening rollers, which results in insufficient straightening forces in the lateral directions "

To cope with this problem, the judging is done

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a profile steel in a certain cross-sectional position (z "Be according to FIG. 5" b), such Profile "(FIG. 5a) tends to assume an abnormal shape due to wavy sections (see FIG. 5c); In addition, in this cross-sectional position there is a difficult impact influencing of the straightening rollers, so that the working conditions are considerably more difficult.

The object of the present invention is to provide a method and to propose a device of the type mentioned above, with which the disadvantages of previously known roller straightening machines for profile steel are avoided, and with which in particular profile steel excellent straightness and shape accuracy can be produced, with excellent working behavior for the straightening machine is required. This object is achieved in that the profile steel at least in an edge region which is curved in a horizontal plane to the longitudinal direction of the section steel, a cross-sectional reduction learns.

A straightening machine suitable for carrying out the method according to the invention is characterized by at least one press roller which is arranged vertically above or below a calibrated straightening roller and is provided with a caliber that corresponds to the cross-sectional shape of the material to be treated in association with or in cooperation with the straightening roller caliber forms, wherein the press roll or «, press rolls are adjustable both in the vertical and in the axial direction _e

Based on the accompanying drawings, the invention will become further elucidated it show:

1 shows the roller arrangement of a known roller straightening machine, in a schematic side view;

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FIG. 2 shows the front view of the arrangement shown in FIG. 1;

5 shows a schematic representation of a straightening roller which is in the desired contact with the item to be "treated; FIG.

FIG. 4 shows an illustration according to FIG. 3, the material, however, being lifted from the straightening roller; FIG.

5a an angle profile to be straightened;

5b shows a processing position for the case that material yielding in lateral directions is prevented;

FIG. 5o a schematic representation of the deformation resulting from straightening the profile shown in FIG. 5a;

6 shows the arrangement of the rollers and cylinders provided in a straightening machine according to the invention, in a schematic representation;

7 shows an illustration of the position of the goods between a straightening roller and a pressure or press roller;

FIG _o 9 and 9 a preferred embodiment of a straightening machine according to the invention; and

10 shows the devices provided on the straightening machine according to FIGS. 8 and 9 for vertical adjustment of the press rolls.

1 to 5 illustrate the prior art already discussed at the beginning, with 2 and 2 ^{denoting 1} straightening rollers in a known arrangement. The order

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the guide rollers A and B can be seen from the figures 1 and 2.

The present invention is to be explained in more detail below with the aid of FIGS. 6 Ms 9.

According to FIG. 6, the "material to be treated" runs between straightening rollers 1V 12, 13, 14, 15, 16, 17, 18, 19 and 20 as well as pressure rollers 11 ', 12', 13 ', 14' and 15 ¹ through. Both the straightening rolls and the press rolls arrangement zigzag are for respectively to each other in installed, as is clear from FIG ₀ 6, d, h _0, the press rolls have for themselves zigzag arrangement, and in the same way, the straightening rolls. This staggered arrangement of the upper and lower press rolls and straightening rolls becomes clear in their combination or superposition from the given side arrangement, the number of rolls or rolls being selected depending on the product.

As can be seen from FIG. 7, the upper straightening roller and the lower press roller 11 'are provided with calibres which correspond exactly to the cross-sectional shape of the goods. The straightening rollers are designed so that they have sufficient strength to achieve easy rolling of the goods in cooperation with the press rollers. The remaining upper rollers or rollers 12 ', 13, 14 *, 15, 17 and 19 are also provided with calibres of the same shape as roller 11, while the remaining lower rollers or rollers 12, 13 ^f , 14, 15 ¹ , 16, 18 and 20 calibres of the same shape as the roller 11 *.

The rollers 11, 11 ", 12, 12", 13, 13 *, 14, 14, 15 and 15 'represent the straightening and rolling area,

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in which both straightening and light rolling are carried out, while rollers 16, 17, 18, 19 and 20 form the straightening area in which only straightening is carried out. The lower rollers and rollers can be made in the direction of decreasing cross-section, wherein the amount of the reduction in cross section can be regulated _o the adjustment of the lower rollers and rolling is effected and controlled by conventional via spindles or hydraulic cylinders or the like. working adjustment devices. The lower rollers and rollers can also be adjusted in the axial direction, the amount of this adjustment also being adjustable. This adjustment is also effected by conventional spindle mechanisms and the like.

The upper rollers 12 * and 14 ¹ are pressure or press rollers which have the same mechanism as the lower rollers and rollers and are also adjustable in the direction of the cross-sectional reduction by means of conventional devices, hydraulic cylinders or the like, these devices being an adjustment allow the adjustment amount »These press rollers 12 * and 14 * are provided with calibres that are precisely matched to the cross-sectional shape of the goods, in combination with the calibres in the lower rollers 12 and 14.

Furthermore, the press rollers 12 ^f and 14 *, in contrast to the other upper rollers, have a spindle mechanism or the like, which allows adjustment in the axial direction, the amount of this adjustment also being adjustable. The number of straightening rolls and press rolls can, if necessary, be larger or smaller than in the illustrated embodiment.

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The following is the mode of action of the invention Straightening machines explained.

As can be seen from FIG. 6, the relative position of the straightening rollers in the direction of the decrease in thickness depends on the amount of deformation to be straightened, the shape, the size and the like of the goods, namely in the state of the zigzag arrangement ₀

In the illustrated embodiment, the above arrangement achieved by offsetting the lower roller 11 *, but is not always limited thereto.

Furthermore, as can be seen from FIG. 7, a distance corresponding to the corners of the respective material section is provided _{between the upper and lower rollers or rollers in the straightening and rolling area.}

In the illustrated embodiment, the relative positions will be both the straightening rollers and the press rollers in the axial direction are set at the same time accordingly the amount to be directed in the lateral directions (right and left), size and shape, seen in Direction of passage of the goods 1 "

By adjusting the relative position of the upper or lower Rolling and rolling in the longitudinal direction of the machine can be the edge or flange area of the nip between upper and lower rollers and rollers can be enlarged or reduced so that it is possible to have a slight Reduction of only the edge areas of the profile steel to be seen.

In this case shown in Fig. 7, the flange

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part (short side) of the goods Figo easily rolled Figure 5a within the tolerance range, so that the material 1 without abnormal deformation (creases) in the web region (long side) as shown in Figure 5c _o addressed ₀

A preferred embodiment of a roll straightening machine according to the invention is described below with reference to FIG 8 and 9 described

The straightening rollers 11 to 20 shown in FIGS. 8 and 9 are all movable in their axial direction. The upper rollers 11, 13, 15, 17 and 19 are not movable in the vertical direction, while the upper rolls 12 and 14 * ¹ in the vertical direction move kön- NEN ₀ The press rolls 11 », 121.13 *, 14 * and 15 * can be moved in both vertical and axial direction ₀ The adjustment of the rollers in vertical and axial direction is usually carried out by means of spindles

Although the adjustment of the press rolls in the vertical and axial direction is usually by means of spindles is achieved are at the top of the adjusting spindle and at the rear end of the roller axis to achieve one Certain roller elasticity springs are provided. This allows almost constant pressure equalization or light rolling force can be maintained even with different thicknesses of the goods.

The adjustment of the straightening rollers can be done in a conventional manner both by turning the spindles, so that each lower roller is held at a predetermined, desired height, as well as by rotating the one for adjustment spindles provided in the axial direction of the rollers,

While the main roles are in the desired position

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are brought, "the press rollers remain free",

The adjustment of the press rolls is done in that the workpiece is inserted to adjust the roll distance between the rotating rolls after the main or straightening rolls have been set, and the rolls are stopped, and that then each press roll is moved in the vertical and axial directions so far is that it touched the workpiece slightly Adjusting the press rollers is achieved by checking the distance between the rollers and the workpiece with the help of a spy od _{e dgl o} As soon as the press roller is adjusted so that there is no gap, it is further adjusted until a load cell provided in the adjusting device indicates a certain constant load; Instead of using a load cell, it is also possible to proceed in such a way that the press roller is moved by a certain amount with the aid of a fine adjustment of the adjusting spindle from the time the gap is removed, so that the workpiece is pressed against the main or straightening rollers.

The Walzan are then set in rotation in order to to challenge the workpiece used for the roller setting for the subsequent straightening process «

A more detailed explanation of the adjustment of the rollers in the vertical and axial directions is given below on Example of the roller :. 15 'given.

First, the nut 26 'is loosened by hand and the Screw 27 'turned manually to close the hollow shaft 25' rotate in the axial direction due to the engagement

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of its external thread with the internal thread of one in the housing 23 ^! attached nut 24 is movable "At the same time as the movement of the hollow shaft 25 * in the axial direction, a shaft 30 ·, which is held in the hollow shaft 25 ', is moved under the influence of a spring 31 *, but the rotational movement of the hollow shaft does not affect the Shaft 30 * transmits, since a ball bearing 29 * is provided. As a result, the roller 15 * attached to the shaft 30 * is moved in the axial direction

The adjustment of the upper roller 15 in the axial direction is carried out in the same way as that of the Roller 15 * with the difference that the hollow shaft 25 is rotated with the aid of a wrench.

The rollers 11 ', 12', 13 '14 · and 15' can both in be moved vertically as well as horizontally «,

The vertical adjustment is again explained in more detail below using the example of the roller 15 '

A shaft 32 mounted in a holder S is rotated with the aid of a screw 32a, as a result of which a chain wheel 33 is moved, which in turn sets chain wheels 34 and 35 in rotation via a chain 36. The rotation of the sprocket 35 is transmitted to emne shaft 37 of FIG ₀ 10b into a gear box 38a befindliches worm gear 38 _β drives By the engagement of the external threads of two shafts 39 and 39 * with the worm gear, the shaft is moved in the vertical direction 39 and thereby also the housing 23 * up and down, namely via the part 40 at the upper end of the shaft 39 and the spring 41 "In this way the in the housing 23 '

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fixed roller 15 ¹ adjusted up and down,

The shaft 32 'can also be set in rotation with the aid of a screw nut 32a ¹ in the manner described above. In this case the sprockets 33 ', 34 ^! and 35 'set in rotation via the chain 36 * in order to drive the worm gear 38, which in turn moved the shaft 39 in the vertical direction

The adjustment of the caliber line between the rollers and Rolling is done by adjusting the housing accordingly with the help of the screw mechanism in the elongated opening 45 and the spindles 42, 42 », 46, 46», 47 and 47 'carried out.

Due to the design and functioning of the straightening machine according to the invention, as described above, can not only do profile steel with a symmetrical cross-section but also those with an asymmetrical cross-section, such as the good shown in FIG. 5, with excellent success straightened and precisely brought to the desired cross-section; it also stands out the machine according to the invention durch.gereringeren power requirement and excellent behavior during the straightening process the end.

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Claims (3)

NIPPON STEEL CORPORATION, No. 6-3, 2-chome, Ote-machi, Chiyoda-ku, Tokyo, Japan Patent claims: i .) A method for straightening profile steel, characterized in that the profile steel undergoes a cross-section reduction at least in an edge region which is curved in a horizontal plane to the longitudinal direction of the profile steel. 2. The method according to claim 1, characterized in g e that the inner edge area is the flange part of the profile steel. 3. Roller straightening machine for performing the method according to claim 1 or 2, characterized by at least one press roller, which is arranged vertically above or below a calibrated straightening roller, is and is provided with a caliber which, in association with or in cooperation with the straightening roller caliber forms the cross-sectional shape of the material to be treated, the press roll or press rolls both in vertical and are adjustable in the axial direction. k09823 / 031Ö