EP3452233B1 - Rundsieb sowie herstellungsvorrichtung hierfür - Google Patents

Rundsieb sowie herstellungsvorrichtung hierfür Download PDF

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Publication number
EP3452233B1
EP3452233B1 EP17720099.5A EP17720099A EP3452233B1 EP 3452233 B1 EP3452233 B1 EP 3452233B1 EP 17720099 A EP17720099 A EP 17720099A EP 3452233 B1 EP3452233 B1 EP 3452233B1
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EP
European Patent Office
Prior art keywords
metal strip
sheet
wave
sheet metal
windings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17720099.5A
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German (de)
English (en)
French (fr)
Other versions
EP3452233A1 (de
Inventor
Frank Lotter
Franz ANDRITZKY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scherdel Innotec Forschungs und Entwicklungs GmbH
Original Assignee
Scherdel Innotec Forschungs und Entwicklungs GmbH
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Publication of EP3452233A1 publication Critical patent/EP3452233A1/de
Application granted granted Critical
Publication of EP3452233B1 publication Critical patent/EP3452233B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4618—Manufacturing of screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles

Definitions

  • the present invention relates to a cylinder mold and a production device for a cylinder mold.
  • a sieve with a plurality of sieve openings in a sieve surface is known.
  • the sieve has a plurality of sheet metal strip layers placed on edge, arranged next to one another and in some areas in contact with one another.
  • the sheet metal strip layers are arranged in such a way that lateral end faces of the sheet metal strip layers are arranged essentially in the plane of the screen surface and areas of adjacent sheet metal strip layers that are not in contact define screen openings.
  • Such a sieve has the disadvantage that its sieve openings often clog during operation.
  • a cylinder mold according to the invention comprises an essentially cylindrical and / or essentially frustoconical base body which is formed from a metal strip wound into a plurality of sheet metal strip turns; wherein the sheet metal strip describes a wavy line oscillating about a reference plane with wave crests and with wave troughs; Adjacent sheet metal strip windings in each case bear against one another in such a way that sieve openings are formed in the radial direction; and wherein the height of the wave crests and the wave troughs of the sheet metal strip windings, based on the reference plane, increases in the radial direction outward, so that the size of the sieve openings increases in the flow direction radially outward; or wherein the height of the wave crests and the wave troughs of the sheet metal strip windings, based on the reference plane, increases in the radial direction inwards, so that the size of the screen openings increases radially inwards in the flow direction.
  • the essentially cylindrical or essentially frustoconical base body of the cylinder mold is formed from a sheet metal strip which is wound into a multiplicity of sheet metal strip windings and which describes an oscillating undulating line with wave crests and with wave troughs.
  • the respective adjacent sheet metal strip windings are in contact with one another in some areas and each form sieve openings in the radial direction between the contact areas.
  • the screen openings have in particular a repeating or constant opening profile.
  • the sheet metal strips can be wound up in a helical manner in the axial direction, one above the other, resulting in an essentially cylindrical basic shape of the base body of the cylinder mold.
  • the sheet metal strip prefferably wound up in a helical manner, that is to say with a diameter that changes in the axial direction, which essentially results in a truncated cone-like basic shape of the cylinder sieve base body.
  • a cylinder mold according to the invention it is also possible for a cylinder mold according to the invention to form a combination of essentially frustoconical and / or essentially cylindrical base body sections.
  • the height of the wave crests and the wave troughs of the sheet metal strip windings increases or decreases in the radial direction relative to the reference plane, so that the size of the sieve openings increases or decreases in the radial flow direction outward.
  • the reference plane lies in particular in a spiral shape and follows the winding direction of the sheet metal strip.
  • the sieve openings thus form a small inlet opening in the flow direction and a cross section that widens at least in some areas towards the outlet opening. On the one hand, this reduces the tendency to clog, and on the other hand, such sieve openings can simply be flushed free even if they are blocked during operation, for example in an intermittent flushing operation with a corresponding flushing medium such as water.
  • the sheet metal strip is in particular shaped to be periodically repeating.
  • the wave line with wave crests and wave troughs is therefore essentially the same for the sheet metal strip windings lying one above the other.
  • a cylinder sieve according to the invention can also be referred to as a sieve basket and is used particularly in the paper and pulp industry, in wastewater treatment, in fiber recovery, in sludge thickening, in chemical production plants, in juice presses, in the food industry or generally in sorting and filtration processes.
  • the cylinder mold is a cylinder mold with a flow direction from the inside to the outside; and the height of the wave crests and the wave troughs of the sheet metal strip windings, based on the reference plane, and thus the amplitude increases in the radial direction outwards, so that the size of the sieve openings increases in the flow direction from the inside, radially outwards
  • Such a round sieve has very good sieving results when a medium to be sieved flows through from the inside to the outside, and clogging of the sieve openings is largely avoided.
  • the cylinder mold is a cylinder mold with a flow direction from the outside to the inside; and the height of the wave crests and the wave troughs of the sheet metal strip windings, based on the Reference plane, in the radial direction and thus the amplitude increases inward, so that the size of the sieve openings increases in the flow direction from the outside radially inward.
  • Such a round sieve has very good sieving results when a medium to be sieved flows through it from the outside in, and clogging of the sieve openings is largely avoided.
  • the oscillating wavy line has wave peaks and wave peaks flattened with wave troughs and flattened wave troughs.
  • the oscillating wave line with wave crests and with wave troughs essentially has a sinusoidal shape with round or rounded wave crests and with round or rounded wave troughs.
  • adjacent sheet metal strip windings are in contact with one another with their flank sections between the wave crests and the wave troughs in such a way that sieve openings are formed in the radial direction between the wave crests and the wave troughs of sheet metal strip windings lying one above the other.
  • the sheet metal strip turns are arranged in phase one above the other, so that the wave troughs of a sheet metal strip turn each lie above the corresponding wave troughs of the sheet metal strip turn below and that the wave peaks of a sheet metal strip turn each over the wave peaks of the respective sheet metal strip winding arranged underneath lie, each seen in the axial direction.
  • the flank sections between the wave crests and the wave troughs of adjacent sheet metal strip windings lie against one another.
  • the screen openings formed in this way have, with an essentially sinusoidal design of the wavy line of the sheet metal strip, essentially a crescent-like basic shape and, with a flattened, wavy design of the corrugated line of the sheet metal strip, a roughly trapezoidal basic shape, each looking radially inward or radially outward.
  • the sheet metal strip turns can also be arranged offset to one another, so that the corrugation troughs of an upper sheet metal strip turn abut the corrugation peaks of the sheet metal strip turn below and the screen openings through the free cross section between a corrugation peak of an upper sheet metal strip turn and a are formed in the axial direction underlying wave trough of a lower sheet metal strip turn.
  • sheet metal strip windings prefferably be arranged one on top of the other in intermediate positions between the two mentioned arrangement options.
  • the circumferential surface formed by the sieve openings in particular by the smallest openings of the sieve openings in each case, is 15-50% of the sieve opening area of the cylinder mold.
  • the ratio of the sieve opening area of the cylinder to the sieve opening area or total jacket area can be adjusted for the respective application by appropriately designing the corrugated shape of the sheet metal strips and by appropriately selecting the contact areas of adjacent sheet metal strip turns.
  • a large screen opening area ratio can be achieved, which is in a range of 30-50%.
  • adjacent sheet-metal strip windings are in contact with one another
  • the round screen furthermore has a frame which holds the respectively adjacent sheet-metal strip windings in the abutting position against one another.
  • adjacent sheet metal strip windings do not have to be connected to one another by welding connections.
  • the holding of the adjacent sheet metal strip turns in relation to one another and the sieve openings is brought about by a frame which fixes the sheet metal strip turns to one another in the axial direction.
  • each adjacent sheet metal strip windings can be welded to one another.
  • a separate frame is unnecessary, but can still be provided.
  • each adjacent sheet-metal strip turns are welded to one another on at least some of the flank sections of adjacent sheet-metal strip turns that are in contact with one another.
  • the angle of inclination of the wave crests and the wave troughs of the sheet metal strip windings, based on the reference plane, is 1-20 ° in the radial direction.
  • the sheet metal strip has an essentially rectangular cross section.
  • Typical dimensions of the sheet metal strip are as follows: width 2-5mm, height 3-5mm, stretched length, based on a period, 2-5mm.
  • Typical sieve openings have an opening width of 0.1-0.3mm and / or a height of 1-3mm.
  • a cylinder mold according to the invention can be produced inexpensively.
  • the sheet metal strip can either already be supplied in the desired length, alternatively an endless sheet metal strip can be supplied and after production of the cylinder mold with the desired number of sheet metal strip turns.
  • the inventors have determined that in a rounding process in which a sheet metal strip with a wave shape with wave crests and troughs is wound up to form a plurality of sheet metal strip windings, some of which lie against one another and form sieve openings in between, so that overall a cylinder mold with a substantially cylindrical and / or substantially frustoconical base body is formed, the effects of stretching the waveform on the outside and compressing the waveform on the inside occur, so that the height of the wave crests and the wave troughs and thus the amplitude and the Size of the sieve openings increases radially from the outside inwards.
  • the amplitude on the inside of the undulating sheet metal strip is higher because - to put it simply - the material has to evade.
  • the curvature of the wave-shaped sheet metal strip over its width can be specifically influenced in advance by a corresponding gear geometry of the at least one pair of counter-rotating gears after the rounding process.
  • a cylinder sieve in which the size of the sieve openings increases radially from the outside to the inside is well suited for applications in which the flow direction is radially from the outside to the inside.
  • such a cylinder sieve is less suitable because it has a very strong tendency to clog.
  • the enlargement of these sieve openings can be set to the desired size by means of the gear geometry of at least one gear pair.
  • the effect of the elongation of the outside and the compression of the inside that occurs during the rounding process is specifically strengthened or reduced by the gear geometry.
  • a cylinder mold is to be produced with the production device according to the invention with a flow direction radially from the inside to the outside, in which an enlargement of the sieve openings radially from the inside to the outside is desired
  • the suitable choice of the gear geometry of the at least one pair of counter-rotating gears can be achieved that despite the effect of stretching on the outside and upsetting on the inside, the height of the wave peaks and the wave troughs of the sheet metal strip windings and thus the amplitude in the radial direction increases outwards and thus the size of the sieve openings in the desired flow direction radially from increases inside out.
  • a first pair of counter-rotating gears is provided, which are arranged and designed above and below the sheet metal strip to be passed through so that the sheet metal strip is thereby transformed into a wave shape with wave crests and with wave troughs as it passes through.
  • a second pair of counter-rotating gears can be provided, which are arranged and designed above and below the sheet metal strip to be passed through so that the sheet metal strip is transformed into a flattened wave shape with flattened wave crests and with flattened wave troughs as it passes through.
  • both a round or rounded wave shape and a flattened wave shape can be produced.
  • the teeth and the interdental spaces of the at least one pair of counter-rotating gears are designed to be inclined, in each case based on the axial direction of the respective gear, in order to give the sheet-metal strip, which is formed into a wavy line with crests and troughs, an inclined cross-section in order to the effect of upsetting the inside of the corrugated sheet metal strip and stretching the outside of the corrugated sheet metal strip as it is rounded through the at least two Reinforce or reduce rounding rollers in order to increase the height of the wave crests and the wave troughs of the sheet metal strip windings and to enlarge the screen openings in the flow direction radially outwards, based on the reference plane; or despite the effect of compressing the inside of the corrugated sheet metal strip and stretching the outside of the corrugated sheet metal strip when rounding by the at least two rounding rollers, an increase in the height of the wave crests and the wave troughs of the sheet metal
  • the manufacturing device also has a welding unit that welds adjacent sheet metal strip turns to one another, in particular welds adjacent sheet metal strip turns to one another on at least some of the adjacent flank sections.
  • a frame attachment unit is also provided which, in particular, braces the sheet metal strip windings against one another in the axial direction.
  • Figure 1 shows a schematic perspective view of a cylinder mold 2.
  • the cylinder mold 2 has a cylindrical base body which is formed from a sheet metal strip 2 wound into a multiplicity of sheet metal strip turns. In the present, non-limiting exemplary embodiment, the cylinder mold 2 has about 40 sheet metal strip turns.
  • the rolled up sheet metal strip 2 has a regular wave shape with alternating wave crests and wave troughs, which in the present exemplary embodiment is approximately sinusoidal.
  • the sheet metal strip turns are arranged in phase with one another, so that their troughs and their wave crests are arranged at corresponding circumferential positions, so that the troughs of a sheet metal strip turn each in the direction of the wave troughs of the sheet metal strip turn below extend so that the corrugation peaks of a sheet metal strip turn are arranged above the corrugation peaks of the respective sheet metal strip turn below and so that the flank or slope sections between a wave peak and an adjacent wave trough and a wave trough and an adjacent wave crest are each arranged on the corresponding underneath Flank or slope sections of the underlying sheet metal strip winding are in contact.
  • Welded connections can be provided between some or all of such abutting flank sections.
  • the cylinder mold 2 can also be designed without such welded connections. In this case it is expedient to provide a frame which holds or braces the sheet metal strip turns 4 against one another in the axial direction in order to prevent adjacent sheet metal strip turns from diverging.
  • sieve openings are formed, which in the side view each have an upper or lower crescent-like shape.
  • the sheet metal strip windings thus describe a wavy line oscillating around a reference plane, which is in particular spiral-shaped, with wave crests and with wave troughs.
  • the slope of this reference plane and thus the windings of the sheet metal strip is very small and lies in a range of 0-1 °.
  • the sheet metal strip is made of a metal material, in particular a rust and corrosion-resistant metal material.
  • the partial figure 2 (a) corresponds to Figure 1 , and to avoid repetition it is not explained again.
  • the sub-figures 3 (a) and 3 (c) each show a period of a sinusoidal sheet metal strip winding section 12 from the trough 10 over the rising flank section 8, the crest 6, the falling flank section 8 to the next trough 10, each on the outside ( Figure 3 (c) ) and on the inside ( Figure 3 (a) ). It can be clearly seen that the amplitude of the sheet metal strip winding is higher on the outside than on the inside.
  • valley figure 3 (b) shows a sectional illustration through the sinusoidal sheet metal strip winding section 12, specifically through a sectional plane which is perpendicular to the plane of the drawing and which extends through the sinusoidal winding section 12
  • Figures 3 (a) and 3 (c) The trough 10 located on the right intersects, looking to the left.
  • the reference plane of the sheet metal strip winding 4 and the in Figure 3 The sinusoidal sheet metal strip winding section 12 shown intersects the sheet metal strip winding section 12 centrally in a horizontal left-right direction. In relation to such a reference plane, the height of the wave crests 6 and the wave troughs 10 increases from the inside to the outside in the radial direction.
  • the representation of the Figure 4 corresponds essentially to illustration 3, the sheet metal strip winding section 14 describing a flattened, undulating course instead of a sinusoidal course.
  • the wave crests 16 and the wave troughs 20 are therefore not rounded, but flattened, resulting in wider and less high screen openings when a plurality of sheet metal strip windings 14 of the Figure 4 shown type are wound to a substantially cylindrical or substantially frustoconical base body and the wave crests 16 and the wave troughs 18 of adjacent sheet metal strip windings 14 are superimposed and the rising and falling flank sections 18 each bear against each other.
  • the angle of inclination of the wave crests 6 and wave troughs 10 radially from the inside to the outside, in each case based on the reference plane, is 1.5 °.
  • the one in the Figures 3 and 4th The opening angle ⁇ drawn between the wave valley 20 and the wave crest 16 is thus 3 °.
  • FIG. 5 (a) a cylinder screen cutout 22 with sinusoidal sheet metal strip windings is shown in a side view from the outside. This clearly shows that the sheet metal strip windings 4 lying one above the other are arranged in phase, the wave troughs 10 of which each form intermediate crescent-shaped screen openings 11, that their wave crests 6 are also arranged one above the other and also essentially form crescent-shaped screen openings 11 between them rising and falling flank sections 8 are each in contact with one another.
  • the height h of the sieve openings 11 on the outside is 0.25 mm in the present exemplary, non-limiting embodiment, and the area F on the outside, i.e. at the outlet opening of the sieve openings 11, is 0.16 mm in the present exemplary, non-limiting embodiment 2 .
  • the area F on the outside i.e. at the outlet opening of the sieve openings 11, is 0.16 mm in the present exemplary, non-limiting embodiment 2 .
  • other heights and other areas are possible.
  • the thickness d of the sheet metal strip winding section 24 is 0.45 mm in the present exemplary, non-restrictive embodiment, and the stretched one Length l on the inside, that is to say the length of one period of a sinusoidal sheet metal strip winding section 24, is 3.94 mm, and on the outside 4.23 mm.
  • the sinusoidal sheet metal strip winding section 24 is shown on the inside. It can be clearly seen that the amplitude and the height of the wave crests 6 and the wave troughs 10 are smaller than on the outside.
  • the angle of inclination of the wave crests 6 and the wave troughs 10 radially from the inside to the outside is in the present exemplary, non-restrictive embodiment, 1.5 °, based on the horizontal reference plane running in the left-right direction.
  • the opening angle ⁇ between the wave crest 6 and the wave trough 10 lying next to it is shown, which in the present exemplary, non-limiting embodiment is 3 °.
  • the height of the amplitude h i on the inside is 1.56 mm
  • the height of the amplitude h a on the outside is 1.75 mm
  • the width b of the sheet metal strip winding measured in the radial direction is 3.7 mm.
  • a vertical section line AA is drawn through the wave troughs 10 of the sheet metal strip windings.
  • the sectional view of the Fig. 5 (e) along the section line AA according to Figure 5 (a) one can clearly see the increase in the height of the wave troughs 10 in the radial direction from the inside to the outside and the enlargement of the sieve openings 11 radially from the inside to the outside.
  • the partial figure 5 (e) is a schematic representation.
  • the waves overlap over the conical embossing and thus have a balancing effect.
  • the deviation is then minimally different from the cylinder axis.
  • the sub-figures 6 (a) to (e) largely correspond to the sub-figures 5 (a) to (e), with the sheet metal strip windings not having a sinusoidal shape, but a flattened wave-like shape.
  • the height h of the sieve opening 11 on the outside is also 0.25 mm, the area F occupied by a sieve opening 11 on the outside is 0.26 mm 2 .
  • the stretched length l is 3.83 mm, the width b of the sheet metal strip windings seen in the radial direction is also 3.7 mm.
  • the height h i of the amplitude on the inside is 1.16 mm, the height h a of the amplitude on the outside is 1.35 mm.
  • the stretched length l on the inside is 3.64 mm
  • the stretched length l on the outside is 3.83 mm
  • the angle of increase in height of the wave peaks and troughs 16 and 18 with respect to the reference plane running horizontally in the left-right direction is 1 , 5 °
  • the opening angle ⁇ radially from the inside to the outside is 3 °.
  • the circumferential surface occupied on the outside by the sieve openings 11, based on the entire outer circumferential jacket surface, is in accordance with a cylinder sieve with sinusoidal sheet metal strip windings Figure 5 exemplary 16% and for a cylinder mold with flattened, undulating sheet metal strips according to FIG Figure 6 exemplary 24.5%.
  • Figure 7 shows a schematic illustration of a cylinder mold production device 34 with a sheet metal strip 36, with a first pair of counter-rotating gears 38, with a second pair of counter-rotating gears 40, with a tooth shape representation 44, and with rounding rollers 42.
  • the flat sheet-metal strip turns into a uniform, rounded, in particular substantially reshaped sinusoidal wave form with wave crests and wave troughs.
  • the teeth of one of the two gears 38 each engage a little into the interdental spaces of the opposing gear 38, and the shape of the teeth is correspondingly rounded.
  • the now corrugated sheet metal strip is passed between the second pair of counter-rotating gears 40 and formed there into a flattened wave shape with flattened wave crests and flattened wave troughs, the amplitude also being reduced here.
  • the teeth of one gear wheel of the gear wheel pair 40 again mesh with the gaps between the teeth of the respective opposing gear wheel, and the corrugated sheet metal strip 36 is fed in such a way that its waveform corresponds in phase with the tooth profile of the second gear wheel pair 40, so that the previously rounded Wave crests and wave troughs are reshaped into flattened wave crests and wave troughs.
  • the teeth and / or the spaces between the teeth of at least one of the two gear wheel pairs 38 and 40 can be designed to be inclined in the axial direction of the respective gear wheel in order to transform the sheet metal strip into an inclined wave shape along its width.
  • This inclination is chosen so that the effect of upsetting the inside of the corrugated sheet metal strip and stretching the outside of the corrugated sheet metal strip is specifically enhanced or reduced during the subsequent rounding by the rounding rollers 42.
  • the teeth have at least one of the two gear wheel pairs 38 and 40 and, accordingly, the interdental spaces have a tooth shape, as shown in the tooth shape illustration 44 , with a tooth flank that rises outwards in relation to the radius of curvature, so that the flattened, undulating sheet metal strip has a higher amplitude and thus higher wave crests and troughs on its outside.
  • the inclination of the teeth and the interdental spaces of at least one gear pair 38, 40 is to be designed with a smaller, outwardly increasing inclination angle than shown in the tooth shape illustration 44.
  • the rounding rollers 42 which are arranged to the left and right of the continuous, flattened corrugated sheet metal strip 36, round it to a round screen, like it in the Figures 1 , 2 , 4th and 6 is shown.
  • the flattened corrugated sheet metal strip 36 is wound up into a plurality of sheet metal strip windings which describe a wavy line oscillating around a reference plane with wave crests and with wave troughs in such a way that adjacent sheet metal strip windings lie against one another so that sieve openings are formed in the radial direction.
  • the flattened, corrugated sheet metal strip 36 is wound up to form a base body made up of a multiplicity of wound sheet metal strip turns lying against one another in such a way that the adjacent Sheet metal strip windings lie in phase, so that their wave crests and wave troughs are arranged one above the other and their rising and falling flank sections rest against one another, as shown in the figures described above.
  • the manufacturing process can be stopped. Either the supplied sheet metal strip is completely wound up or it is cut to length accordingly.
  • sheet-metal strip windings that are adjacent to one another can be welded to at least some of the areas that are in contact with one another.
  • a frame structure can be mounted on the cylinder screen produced in this way, which supports the sheet metal strip windings in the axial direction or braces them against each other so that their adjacent areas remain permanently in contact.
  • the second pair of gears which is responsible for shaping into a flattened wave-shaped wave shape, can be omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP17720099.5A 2016-05-03 2017-04-26 Rundsieb sowie herstellungsvorrichtung hierfür Active EP3452233B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016108177.9A DE102016108177B4 (de) 2016-05-03 2016-05-03 Rundsieb sowie Herstellungsvorrichtung hierfür
PCT/EP2017/059972 WO2017191017A1 (de) 2016-05-03 2017-04-26 Rundsieb sowie herstellungsvorrichtung hierfür

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EP3452233A1 EP3452233A1 (de) 2019-03-13
EP3452233B1 true EP3452233B1 (de) 2020-08-19

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EP (1) EP3452233B1 (zh)
CN (1) CN109153041B (zh)
DE (1) DE102016108177B4 (zh)
WO (1) WO2017191017A1 (zh)

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CN110828175B (zh) * 2019-11-18 2022-09-27 株式会社村田制作所 一种金属化薄膜电容器波浪形端面的成形方法
CN112642511B (zh) * 2020-11-20 2022-03-08 含山县仙踪镇在文家庭农场 一种稻谷加工方法

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DE102016108177B4 (de) 2019-05-23
CN109153041B (zh) 2021-10-22
CN109153041A (zh) 2019-01-04
DE102016108177A1 (de) 2017-11-09
WO2017191017A1 (de) 2017-11-09

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