Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
  • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
  • B65H23/025—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/10—Rollers
  • B65H2404/13—Details of longitudinal profile
  • B65H2404/137—Means for varying longitudinal profiles
  • B65H2404/1371—Means for bending, e.g. for controlled deflection

Definitions

• the invention relates to a turned part, in particular an spreader roller for a web processing machine.
• Spreader rollers are used in web processing machines to avoid wrinkling or sagging when the material web is running due to the material web being stretched. Furthermore, spreader rolls are used to let material webs arranged in parallel next to each other run sideways apart. Material webs arranged in parallel next to one another can be produced, for example, by longitudinally cutting a wide material web.
• the spreader rolls known from the prior art usually have a bent and standing core, on which a plurality of independent roller segments are supported by means of roller bearings in order to emulate a curved roller in several sections.
• the above Spreader rollers are complex to construct and maintain. Furthermore, the above Spreader rollers cannot adjust the curvature.
• a spreader roller is also known, in which the outer jacket has a bearing rod attached to each longitudinal end, which is mounted on a so-called double bearing. Due to the lack of a connection between the two double layers, when the spreader roller bends, the torque introduced must be absorbed by the frame as a torsional moment. This makes simple attachment to the chair impossible. Furthermore, with spreader rolls of this type, high forces are exerted on the bearing, which can result in high bearing wear.
• the invention is based on the idea of creating a turned part, in particular an spreader roll, in which the angle of the deflection and also the size of the deflection (curvature) can be carried out independently of the bearing core.
• a rotating part, in particular spreader roll for a web processing machine, according to the genus has a support core with a longitudinal axis.
• the support core is supported at its two longitudinal ends.
• the generic rotary part has an elastically bendable outer jacket which surrounds the support core in its circumferential direction and which extends at least in sections between the two longitudinal ends of the support core.
• the outer casing is mounted on at least one bearing on the support core.
• the outer casing is mounted on the bearing in such a way that the outer casing is immovable perpendicular to the longitudinal axis of the support core.
• the outer jacket is on at least one displacement point is slidably mounted perpendicular to the longitudinal axis of the support core, the displacement point being spaced apart from the bearing along the longitudinal axis of the support core. This allows the curvature of the outer jacket to be adjusted.
• the outer jacket between the bearing and the displacement point is at least partially elastically deformable.
• the outer casing is designed to be elastically deformable, at least in sections.
• the longitudinal axis of the outer casing between the bearing and the displacement point is curved relative to the longitudinal axis of the support core.
• a displaceability or non-displaceability perpendicular to the longitudinal axis of the support core is to be understood to mean that the displacement has a component that runs perpendicular to the longitudinal axis of the support core at the displacement point or bearing.
• the outer jacket is preferably formed in one piece between the bearing and the displacement point.
• one-part is to be understood to mean that the outer jacket is formed by a coherent material section (either from a casting or from a plurality of material sections) and not by a plurality of material sections that are not connected to one another.
• the outer jacket also has a displacement component parallel to the longitudinal axis of the support core.
• the outer jacket can be compressed in its longitudinal direction, whereby a different bending line can be obtained.
• two displacement points are provided, between which the bearing is arranged. This makes it possible to bend the outer casing on both sides of the bearing.
• the outer casing has a displacement point on each of its two longitudinal ends. If the bearing is preferably provided in the middle region of the longitudinal extent of the outer casing, the outer casing can be bent symmetrically relative to the bearing.
• the outer casing on the bearing is rotatably connected to the support core, so that the outer casing is rotatably mounted on the support core.
• the rotatable mounting can take place via roller or slide bearings.
• hydrodynamic or hydrostatic sliding bearings or air bearings are conceivable as sliding bearings.
• the above Feature is particularly, but not exclusively, of advantage if the support core cannot be rotated about its longitudinal axis.
• the outer jacket is connected in a rotationally fixed manner to the support core at the first support point. This means that a rigid connection is created between the outer jacket and the support core To enable torque transmission between the support core and the outer jacket and to secure the outer jacket against displacement in the longitudinal direction.
• the non-rotatable connection between the support core and the outer jacket can be established, for example, by gluing or pressing.
• the above Embodiment is essentially applicable if the support core is rotatable about its longitudinal axis.
• a further embodiment of the present invention also provides that at least one support point is provided, which is fastened to the outer jacket or to the support core and arranged in the longitudinal direction between the bearing and the displacement point, at which the support core or the outer jacket can be brought into contact at least in sections if the outer jacket is curved.
• the at least one support point makes it possible to influence the line of curvature or bending of the outer casing relative to the support core, since the minimum distance between the outer casing and the support core is determined by the support casing when the outer casing bends.
• the rotatable mounting can be done via angle-adjustable roller or slide bearings.
• the second support points are arranged in the longitudinal direction on both sides of the bearing and between the two displacement points. It is thus possible to set a curvature of the outer jacket that runs symmetrically to the bearing.
• the position of the outer casing relative to the support core can be achieved, for example, by two eccentric disks which can be rotated relative to one another and which in each case exert an influence on the displacement points arranged on the longitudinal ends.
• a moment is induced by the deflection at the displacement points and the immovable mounting of the outer jacket on the support core on the bearing, which deforms the outer jacket relative to the support core in accordance with its bending line.
• a further possibility of the displaceable mounting consists of guides which can be displaced in two planes and which can each influence the displacement points arranged on the longitudinal ends.
• the adjustment can be confirmed hydraulically, pneumatically, electrically or manually.
• the relative adjustment is accomplished by piezoelectric elements incorporated in the outer tube.
• the incorporated piezoelectric elements can be designed, for example, in the form of piezo fibers. By applying appropriate electrical voltages, the piezoelectric elements expand and contract at different locations on the outer shell, causing the outer shell to bend.
• the support core can be designed.
• the longitudinal axis of the support core runs straight. With a straight support core, it is possible that the support core rotates about its own axis as well as that the support core cannot be rotated about its own axis.
• Another embodiment of the invention also provides that the longitudinal axis of the support core is curved. With this variant, it is only possible that the support core does not rotate about its own axis and that the rotatability of the Outer jacket is realized by rotatable storage in the warehouse.
• the support core has an at least sectionally changing cross-sectional shape ha, in particular at least sectionally conical, along its longitudinal axis.
• the support core is at least partially made of a material with a modulus of elasticity in the range from 10 to 1000GPa, preferably from 50 to 800GPa, particularly preferably from 100 to 500GPa and a density in the range of 0.5 to 3 g / cm 3 , preferably from 1.0 to 2.0 g / cm 3 , particularly preferably from 1.3 to 2.0 g / cm 3 .
• Preferred materials for the production of the support core are in combination or alone: plastics and / or metallic material and / or fiber composite materials which are of sandwich construction and / or in the form of foams and / or in the form of honeycombs and / or of ceramic material, for example thermally sprayed Layers, in particular metals, metal oxides and / or thermally sprayed plastics or sintered ceramics or the like are made.
• the support core is constructed from a foam and / or honeycomb core which is covered at least in sections by a fiber composite material.
• a foam core with an almost unlimited possibility of shaping is first created, which is covered by a fiber composite jacket.
• the outer jacket has a modulus of elasticity in the longitudinal direction in the range from 0.5 to 10OOGPa, preferably from 10 to 700GPa, particularly preferably from 50 to 200GPa, the modulus of elasticity of the support core being greater than the modulus of elasticity of the outer jacket.
• the lower modulus of elasticity in the longitudinal direction of the support core can be achieved, for example, in that, in the case of a fiber composite material, the fibers are oriented essentially in the circumferential direction of the support core.
• a preferred embodiment of the invention therefore provides that the outer jacket has a modulus of elasticity in the radial direction which is greater than the modulus of elasticity in the longitudinal direction.
• the influencing of the bending line of the outer jacket can be influenced by changing the material thickness of the outer jacket, so that different bending lines can be set depending on the requirements on the turned part, in particular on the spreader roll. Accordingly, a preferred development of the invention provides that the outer jacket has a material thickness and / or cross-sectional shape that changes at least in sections in its longitudinal direction. Other options for influencing the bending line of the outer jacket are through material orientation and / or through the selected material combination.
• the outer jacket is preferably produced in combination or solely from a plastic and / or from a metallic material and / or from a fiber composite material.
• the outer jacket is covered at least in sections by a cover.
• the cover is made in combination or solely from elastomeric plastic and / or from thermoplastic plastic and / or from thermosetting plastic and / or from ceramic material.
• composition of the cover material changes continuously and / or discontinuously in the axial direction and / or in the longitudinal direction.
• a reference with a continuously changing material composition is to be understood, for example, as a reference that has a continuously changing material composition in the radial and / or axial direction, i.e. a reference material that has no interfaces in its composition, as is the case, for example, with reference material in the layer structure. If the reference material has interfaces in its composition, one speaks of a discontinuous material composition.
• a reference material is mentioned as an example, which continuously changes its composition in the radial direction from 100% thermosetting material to 100% elastomeric material.
• a reference material may also be mentioned by way of example, which is constructed from four layers which are arranged one above the other in the radial direction. It is also possible to choose a structure from one and / or more layers, for example 2,3,5 or more layers.
• the first layer is an adhesive layer for connecting the cover to the outer jacket
• the second layer is a fiber composite layer
• the third layer is an adhesive layer for connecting the second and fourth layers
• the fourth layer is a ceramic functional layer.
• the fiber composite layer is composed of a resin component, a hardener component, a fiber component and optionally one or more
• the resin component epoxy resins, Contain polyurethane resins, phenol-formaldehyde resins and / or cyanate ester resins.
• the fiber component alone or in a mixture can contain fibers of the following types: glass, carbon, aramid, boron, polypropylene, polyester, PPS PEEK, ceramics and / or carbides such as SiC.
• Filler components can contain carbides, metals or oxides.
• the above embodiment includes that the material composition changes continuously or discontinuously in the longitudinal direction of the cover. This makes sense, for example, when marginal zones are subjected to greater stress.
• the edge zones can then be made of a more wear-resistant material than the other areas.
• the surface has, at least in sections, spirally and / or radially arranged grooves and / or through bores and / or blind bores.
• This embodiment creates, for example, grooves for removing air.
• the through holes can also be vacuumed.
• FIG. 1 shows a spreader roller according to the invention in the non-bent state in cross section in the region of the bearing and in the region of a support point and in longitudinal section
• Figure 2 shows a spreader roller according to the invention in the bent state in cross section in the region of the bearing and in the region of a support point and in longitudinal section.
• FIG. 1 shows a spreader roller 1 according to the invention in the non-bent state in cross section in the area of the bearing 6 (FIG. 1a; section line AA in FIG. 1c) and in the area of a displacement point 7 (FIG. 1b; section line BB in FIG. 1b) and in longitudinal section (FIG 1c).
• the spreader roller 1 has a support core 2 with a longitudinal axis 3.
• the Stutzkem 2 is about its just extending longitudinal axis 3 rotatable.
• the support core 2 is rotatably supported in the region of its two longitudinal ends 16 via roller bearings 15.
• the support core 2 is surrounded at least in sections in the direction of its longitudinal axis 3 by an outer jacket 4 with reference 5.
• the outer jacket 4 has a longitudinal axis 8 about which it can be rotated.
• the support core 2 is designed as a composite body with a foam core 17 and a fiber composite jacket 14 enveloping the foam core.
• the outer jacket is designed as a hollow body.
• the support core 2 has along its longitudinal axis
• FIG 3 shows a changing cross-sectional shape which tapers on both sides from the cutting line A-A to the cutting line B-B.
• the outer jacket 4 is made in one piece from a flexible fiber composite material.
• the cover 5 is constructed from four layers, which are arranged one above the other in the radial direction.
• the first layer is an adhesive layer for connecting the cover 5 to the outer jacket 4
• the second layer is a fiber composite layer
• the third layer is an adhesive layer for connecting the second and fourth layers
• the fourth layer is a ceramic functional layer forming the surface of the cover 5.
• the outer jacket 4 is connected to the support core 2 in a rotationally fixed and non-displaceable manner.
• the non-rotatable connection is made by an adhesive connection.
• the longitudinal axis 3 of the support core 2 and the longitudinal axis 8 of the outer casing 4 always fall, i.e. also in the bent state of the outer casing 4 together.
• the outer jacket 4 In the area of the displacement point 7, which is arranged in the area of a longitudinal end of the outer jacket 4 in FIG. 1b, the outer jacket 4 is supported by a Rolling bearings 9 on a bearing 10 displaceable perpendicular to the longitudinal axis 3 of the support core 2 (the arrows in the x and y directions illustrate the possible displacement directions of the bearing 10).
• the outer jacket 4 is thus rotatable relative to the bearing 10 and slidably mounted relative to the support core 2.
• the longitudinal axes 3 and 8 In the unbent state of the outer casing 4, the longitudinal axes 3 and 8 also coincide in the two second support regions 7.
• the bearing 10 can be adjusted in the x and y directions by means of two screw jacks offset by 90 ° to one another.
• the screw jacks can be driven by stepper motors, which in turn are controlled by control electronics in order to be able to set a variable roller curvature.
• support points 12 are arranged on the inside of the outer casing 4 in the direction of the support core 2.
• the support points 12 define the minimum distance between the outer jacket 4 and the support core 2 in contact with the support core 2, as a result of which the bending line of the outer jacket 4 is defined.
• the bearing 6 is arranged centrally in the longitudinal extension of the outer casing 4.
• the support regions 12 are arranged on both sides of the bearing 6 in the longitudinal direction of the support core 2.
• the spreader roller is driven via a drive pulley 18 which is operatively connected to a V-belt (not shown).
• Figure 2 shows the spreader roll 1 according to the invention in the bent state in cross section in the region of the bearing 6 ( Figure 2a, section line A-A in Figure 2c) and in
• the two longitudinal axes 3 and 8 are offset from one another by ⁇ x and ⁇ y due to the displaceable mounting of the outer casing 4 relative to the support core 2.
• the outer jacket 4 is thus bent and deflected relative to the support core 2 due to the non-displaceable mounting in the bearing 6 and the shift by ⁇ x and ⁇ y in the second support regions 7.
• the longitudinal axis 8 of the outer casing 4 is curved relative to the longitudinal axis 3 of the support core 2.
• the support points 12 come to rest on the support core 2 and define the bending line of the outer jacket 4 relative to the support core 2.
• the support points 12 are displaceable in the circumferential direction of the support core 2 relative to the support core 2.
• a kind of slide bearing of the support core 2 on the outer jacket 4 is thus formed on the further second support regions 12.
• the support core 2 is provided with a type of sliding coating at these points.
• roller 2 support core 3 longitudinal axis (support core) 4 outer jacket Reference bearing, displacement point, longitudinal axis (outer jacket), roller bearing (for outer jacket), movable bearing, elevation, support point, longitudinal end (outer jacket), fiber composite jacket, roller bearing (for support core), longitudinal end (support core), foam core drive pulley

Landscapes

• Rolls And Other Rotary Bodies (AREA)
• Treatment Of Fiber Materials (AREA)
• Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
• Die Bonding (AREA)
• Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Applications Claiming Priority (2)

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• 2004
  • 2004-05-29 DE DE102004026535A patent/DE102004026535A1/de not_active Withdrawn
  • 2004-05-29 DE DE202004021651U patent/DE202004021651U1/de not_active Expired - Lifetime
• 2005
  • 2005-04-22 DE DE502005002301T patent/DE502005002301D1/de active Active
  • 2005-04-22 EP EP05740020A patent/EP1753682B1/fr not_active Not-in-force
  • 2005-04-22 WO PCT/EP2005/051812 patent/WO2005115894A1/fr active IP Right Grant
  • 2005-04-22 AT AT05740020T patent/ATE381509T1/de active
• 2006
  • 2006-11-28 US US11/564,036 patent/US7789818B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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