FI116539B - Deflection compensated roll - Google Patents

Description

1,116539

Deflection compensated roll

The present invention relates to a deflection compensated roll, which roll 5 includes a stationary roll axis, a roll mantle rotatably mounted around the roll axis, and loading elements arranged on the roll axis which apply a load to the inner surface of the roll shell in the direction of the nip.

The invention also relates to a method for producing a deflection compensated roll.

It is an object of the present invention to improve the profilability of a specially coated deflection compensated roll used, for example, as a calender roll. Such a deflection compensated roll is usually a so-called CD roll, in which the load elements applying a load on the inner surface of the roll shell in succession in the axial direction of the flange are individually controlled, so that the number of loading zones can be about 60 or more. In the present deflection compensated rolls, the thickness of the roll shell 20 is typically in the order of about 60 to 90 mm, whereby such a thick shell does not transmit the force exerted by the loading shoe over a small area.

In addition, such a thick jacket requires extremely high forces to reshape the jacket and use counter-zones inside the roll jacket.

• · • · ·. ·. : 25 In order to achieve the objects of the invention, the deflection roll • · · ”* · according to the invention is characterized in that the roll sheath is formed, ·! ; a thin metal sheath joined to the end rings of the roll by welding or • I <, · · \ gluing, and the metal sheath being coated with a flexible outer surface * · ·. coating. The process according to the invention, in turn, is characterized by the use of a mold around which a thin metal strip or sheet of metal is tightened, which is then welded into a continuous sheath and then the sheath is removed from the mold.

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The thin metal sheath used in the deflection compensated roll of the invention, preferably of less than about 15 mm, more preferably less than about 10 mm, allows for easier deformation of the sheath, and further simplifies the roll structure and possibly omits counter zones. The calculation required by the roller will also be simplified.

The invention will now be further described with reference to the accompanying drawings, in which:

Figure 1 is a schematic representation of a prior art deflection compensated nip roll, Figure 2 is a schematic partial sectional view of a deflection compensated roll made in accordance with the invention, and Figure 3 is a schematic partial sectional view of a mold used in the method of the invention.

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The prior art deflection-compensated nip roll 10 illustrated in Figure 1 has a central stationary axis 12 around which "" m. ···. ' the roller housing 1 is rotatable, which is loaded in the direction of the nip by the loading elements 11 provided on the central shaft 12 of the nip, which are spaced. ·. : 25 apart in the axial direction of the roll. The load elements 11 are stiffened • · * by zones, for example eight load elements * · ·. *. groups, or individually to form a large amount of single load * * *. · ·! zones of up to 60 elements or more.

Fig. 2 is an enlarged partial view of a roll casing according to the invention, which may be formed, for example, of steel strip 3 116539 or sheet 3, which is tightened around a mold 6 (Fig. 3) and welded into a continuous steel casing 1, a resilient coating 2 is formed around it and then the sheath is detached from the mold 6. The coating 2 can also be thought to be formed around the steel sheath 1 after the steel sheath 5 has been removed as a separate work step. In Figure 2, reference numeral 20 denotes an end ring to which a separate welding end 4 is attached, e.g. by bolts 21. Bearings are designated by reference numeral 22. The sheath 1 is secured by welding or gluing to a welding ring 4. The bearing may also be a plain bearing.

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The steel strip or sheet preferably has a thickness of less than about 15 mm, preferably less than about 10 mm. When using a steel strip, it is wound tightly over the mold 6 and the strip is joined to form a continuous jacket by welding the seam between the strip edges. When using a thin sheet of steel, it is bent around a mold 15 into a cylindrical shape and the longitudinal seam 5 of the shell formed between the ends of the sheet is welded.

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Claims (7)

116539 A deflection compensated roll (10) comprising a stationary roll 5 spindle (12), a roll casing (1) rotatably mounted around a roll axis, and loading elements (11) arranged on the roll spindle (12) to apply a load to the roll roll (1). ) on the inner surface in the direction of the nip to be formed with the counter roll, characterized in that the roll casing (1) is formed by a thin metal casing connected to the roll end rings (20) by welding or gluing a stick; . Deflection compensated roll according to Claim 1, characterized in that the metal sheath (1) has a thickness of less than about 15 mm, preferably less than about 15 mm. Deflection-compensated roll according to Claim 1 or 2, characterized in that the metal sheath (1) is formed by winding a thin steel strip (3) on the mold (6) and attaching the strip as a uniform sheath by welding a seam between the edges of the strip. • «· • · Deflection compensated roll according to claim 1 or 2, known. characterized in that the metal sheath (1) is formed of a thin sheet of steel (3) bent around the mold (6) and the weld (5) formed between the ends of the sheet is thus welded. . ··. A method for manufacturing a deflection compensated roll, the roll comprising a stationary roll shaft (12) rotatably bearing a roll shell (1) and on which roll shaft the loading elements (11) are arranged which apply a load to the roll shell (11). 1) on the inner surface with the counter roll; * in the direction of the formed nip, characterized in that the method uses a mold (6) around which a tightly thin steel strip or plate (3) of steel 116539 is welded, which is welded into a continuous sheath (1); then the diaper is removed from the mold. Method according to Claim 5, characterized in that a flexible coating layer is applied to the outer surface of the metal-shell (1), either when the metal-shell (1) is on the mold (6) or only after the shell has been removed from the mold. A method according to claim 5 or 6, characterized in that the metal strip or plate (3) used in the method has a thickness of less than about 10 to about 15 mm, preferably less than about 10 mm. »· · 116539