EP3715557A1 - Mât articulé doté de segments de mât et procédé de fabrication d'un segment de mât - Google Patents

Mât articulé doté de segments de mât et procédé de fabrication d'un segment de mât Download PDF

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Publication number
EP3715557A1
EP3715557A1 EP20164330.1A EP20164330A EP3715557A1 EP 3715557 A1 EP3715557 A1 EP 3715557A1 EP 20164330 A EP20164330 A EP 20164330A EP 3715557 A1 EP3715557 A1 EP 3715557A1
Authority
EP
European Patent Office
Prior art keywords
mast
sheet metal
metal section
section
articulated
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.)
Pending
Application number
EP20164330.1A
Other languages
German (de)
English (en)
Inventor
Mark Mors
Christoph Sacken
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Publication of EP3715557A1 publication Critical patent/EP3715557A1/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms

Definitions

  • the invention relates to an articulated mast of a large manipulator, in particular a truck-mounted concrete pump, with a plurality of mast segments connected to one another via articulated joints, at least one of the mast segments having a welded construction designed as a box profile in which an upper chord and a lower chord are connected to one another via side web plates, as well as a Method for producing a mast segment of such an articulated mast.
  • Articulated masts in particular for truck-mounted concrete pumps and other types of large manipulators, are known from the prior art in a large number of configurations (see e.g. DE 196 44 410 A1 ).
  • the known mast segments are made from hollow profiles. These hollow profiles are usually welded constructions in which an upper chord and a lower chord are connected to one another via lateral web plates.
  • the mast segments can also be designed as a U-profile, at least in partial areas, for example at points at which a hydraulic cylinder dips into the mast segment.
  • At least one of the web plates and / or the upper flange and / or the lower flange is formed by at least one sheet metal section which has at least one edge running essentially in the longitudinal direction of the mast segment, with the at least one edge ending at a distance from the end of the sheet metal section so that the end of the sheet metal section (9) is not folded, a reduction in warping of the thin-walled sheets in the mast construction of the articulated mast can be achieved in a simple manner. Because the at least one edge ends at a distance from one end or both ends of the sheet metal section, so that the end of the sheet metal section is in each case unedged, a straight transition to the following sheet metal section can be formed with the unedged end of the sheet metal section.
  • the sheet metal thicknesses used can be further reduced in order to save dead weight on the mast segments and thus enable a greater reach of the articulated mast.
  • the edging of the sheet metal sections forming the web plates, the upper chord or the lower chord it is possible in a simple manner to prevent distortions from forming in the welded construction, in particular after the welding process, during cooling.
  • the edging running in the longitudinal direction of the mast segment effectively prevents the formation of warps during the welding process.
  • the at least one edge has a simple V-shaped profile cross section.
  • the simple V-shaped profile cross-section an easy-to-produce edging geometry is given, which effectively prevents the formation of warps in the sheet metal section of the mast segment provided with it.
  • the cant angle of the V-shaped profile cross section should preferably be between 160 and 176 ° between the two canted sections.
  • the radius of curvature of the V-shaped profile cross section is preferably relatively small.
  • An embodiment is particularly preferred which provides that the at least one edge has an arcuate profile cross section.
  • an arched profile cross-section a uniformly curved sheet metal contour is given, which is easy to produce and prevents the formation of warpage in the sheet metal section of the mast segment provided with it.
  • the radius of the arched profile cross-section should be at least 10 cm.
  • a particularly advantageous embodiment of the invention relates to the fact that the at least one edge is directed into the interior of the box profile or outwards from the box profile.
  • the cross-section of the mast segment is not significantly changed either with the orientation of the edging towards the inside of the box profile or towards the outside, so that the dimensions hardly change and existing structures and attachments can also be converted to edged web or belt plates without changes.
  • the sheet metal section has at least two bends running essentially in the longitudinal direction of the mast segment. With several bends running essentially in the longitudinal direction of the mast segment, the risk of warping can be further minimized, since the individual bends running in the longitudinal direction of the mast segment can be brought closer to the welded seams connecting the web plates to the upper chord and the lower chord.
  • An embodiment is particularly advantageous which provides that the at least two folds are aligned converging along the longitudinal direction of the mast segment. This allows the tendency of the sheet metal sections to form distortions to be further reduced.
  • the at least two edges preferably converge towards the tip of the aircraft, that is to say at the last mast segment. This makes it possible to manufacture a particularly light last mast segment in which the sheets used have less of a tendency to form warps.
  • An advantageous embodiment provides that the at least two folds are each directed into the interior of the box profile or each outward from the box profile or that of the at least two folds at least one into the interior of the box profile and at least one outwards out of the box profile is directed.
  • the cross-section of the mast segment is not significantly changed either with the orientation of the edging towards the inside of the box profile or towards the outside, so that the dimensions hardly change and existing structures and attachments can also be converted to edged web or belt plates without changes.
  • a profile angle of the box profile in the area of the at least one edge between one of the web plates and the upper flange and / or between one of the web plates and the lower flange is between 2 and 15 degrees, preferably 4 to 10 degrees is formed offset at right angles.
  • the sheet metal section which is provided with a longitudinal edge, is oriented at a special angle that offers high stability of the mast segment and at the same time reduces the formation of warpage during the welding process.
  • a cant angle of approx. 5 degrees is sufficient for the crease running essentially in the longitudinal direction of the mast segment in order to achieve a corresponding effect.
  • the web plate and / or the upper flange and / or the lower flange is made from at least two sheet metal sections of different thicknesses, the sheet metal sections being connected to one another by a transition, with at least the sheet metal section with the smaller thickness at least has an edge running essentially in the longitudinal direction of the mast segment.
  • the use of sheet metal sections of different thickness enables a weight and stiffness-optimized design of the mast segments, with the edge running essentially in the longitudinal direction of the mast segment in the sheet metal section with the smaller thickness effectively preventing warping in this sheet metal section.
  • the sheet metal sections of different thicknesses are preferably welded to one another by means of butt welding processes to form the transition.
  • a particularly advantageous embodiment of the invention provides that at least the last, preferably only the last, mast segment of the articulated mast, which forms the so-called flyer, has a bend that runs essentially in the longitudinal direction of the mast segment.
  • the edge running essentially in the longitudinal direction of the mast segment means that thinner metal sheets can be used without these tending to form warps during welding. Due to the relatively low moment that the aircraft has to absorb due to the end hose etc., the use of thinner metal sheets is particularly possible here, with a weight reduction on the aircraft allowing further weight reductions on the remaining mast segments, since the moment exerted by the aircraft is reduced is. In addition, the weight reduction enables the mast length to be increased.
  • the invention also relates to a method for producing a mast segment of an articulated mast of a large manipulator, in particular a truck-mounted concrete pump, as described in more detail above and below.
  • the method provides that a box profile is produced by welding an upper chord and a lower chord to lateral web plates, with at least one edge running essentially in the longitudinal direction of the mast segment being introduced into at least one sheet metal section of the upper chord, lower chord and / or web plates before welding is, wherein the edge ends at a distance from the end of the sheet metal section, so that the end of the sheet metal section (9) is not folded.
  • the tendency of the sheet metal section to form warps, in particular after the welding process can be significantly reduced, as explained above.
  • This allows sheet metal sections with a smaller thickness to be easily welded to one another to form the box profile without as the weldment cools down, distortions occur. Because the at least one bend ends at a distance from one end or both ends of the sheet metal section, so that the end of the sheet metal section is not edged, a straight transition to the following sheet metal section can easily be formed with the unedged end of the sheet metal section.
  • a particularly advantageous embodiment of the method provides that the at least one edge is formed by a forming process, i.e. Die bending or folding or free bending or stamping or rolling or deep drawing or the like is introduced into the sheet metal section.
  • a forming process i.e. Die bending or folding or free bending or stamping or rolling or deep drawing or the like is introduced into the sheet metal section.
  • the introduction of the edging by means of one of these manufacturing processes is simple and can be implemented excellently before the upper flange, lower flange and the side web plates are welded together.
  • the articulated mast 1 is built on a chassis 14 of a large manipulator 2 designed as a truck-mounted concrete pump and shown folded.
  • the articulated mast 1 has a plurality of mast segments 4, 4 a connected to one another by articulated joints 3, which mast segments 4, 4 a can be unfolded for the operation of the large manipulator 2.
  • the mast segments 4, 4a are box sections 5 ( Fig. 4 , 6th , 10 ) designed, manufactured as welded structures that have an upper belt 6, a lower belt 7 and two lateral web plates 8.
  • the last mast segment 4a of the articulated mast 1, which forms the so-called flyer is provided with a special sheet metal section 9.
  • This sheet metal section 9, which forms the web sheet 8 of the aviator 4a, has two edges 10 running essentially in the longitudinal direction of the mast segment 4a. With these edges 10 of the web plate 8, the formation of warps during the welding process is prevented.
  • the web plate 8 of the last mast segment 4a is, as in Figure 1 indicated, made of two sheet metal sections 9, 12 of different thickness, which are connected to one another by a transition 13. This transition 13 is achieved by a butt welding process that connects the two sheet metal sections 9, 12 of different thicknesses to one another to form the web sheet 8.
  • the edges 10 running in the longitudinal direction of the mast segment 4a are provided in this sheet metal section 9.
  • the web plate 8 can also be formed from a single sheet metal section provided with one or more edges 10.
  • the Figure 2 shows a detailed view of the last mast segment 4a of the articulated mast 1 according to FIG Figure 1 , wherein the mast segment 4a can be seen from below, so that the lower chord 7 is on the upper side.
  • the web plate 8 of the mast segment 4a is formed from the two sheet metal sections 9, 12 of different thicknesses, which are connected to one another by means of the transition 13.
  • the edges 10 running in the longitudinal direction of the mast segment 4a are only arranged in the sheet metal section 9 with the smaller thickness.
  • the sheet metal section 9 with the smaller thickness forms the web sheet 8 of the last mast segment 4a, from the transition 13 arranged approximately in the center of the mast segment 4a to the end hose suspension 15 at the mast tip 16.
  • the edges 10 in the sheet metal section 9 end at a distance from the end 11 of the sheet metal section 9, so that the end 11 of the thinner sheet metal section 9 is not edged and enables a simple connection in the transition 13 with the thicker sheet metal section 12 of the web plate 8.
  • the two edges 10 running essentially in the longitudinal direction of the mast segment 4a are aligned converging along the longitudinal direction of the mast segment 4a, so that the edges 10 converge in the web plate 8 at the mast tip 16.
  • the Figure 3 shows the front portion of the mast segment 4a according to Figure 3 , but here with a simple edging 10 in the thinner sheet metal section 9.
  • the simple edging 10 in the sheet metal section 9 forming the web plate 8 runs approximately centrally, essentially in the longitudinal direction of the mast segment 4a and ends at a distance from the ends 11 of the sheet metal section 9, so that the ends 11, as can be seen, are not folded.
  • the simple edging 10 shown here has a V-shaped profile cross-section, as well as from Figure 4 can be seen.
  • the Figure 4 shows a sectional view through the in Figure 3 indicated section plane BB through the box profile 5 of the mast segment 4a.
  • the edging 10 arranged centrally in the web plates has a V-shaped profile cross-section.
  • This profile cross-section is easy to produce and effective against the formation of distortions in the sheet metal section 9 of the mast segment 4a that forms the web plate 8.
  • the cant angle ⁇ of the V-shaped profile cross section is between 160 and 176 ° between the two canted sections, the cant radius of the V-shaped profile cross section being relatively small, as can be seen.
  • the profile angle ⁇ of the box profile 5 in the area of the at least one edging 10 is between the web plate 8 and the upper flange 6 and between the web plate 8 and the lower flange 7 in the case of the simple edging 10 preferably between 3 and 10 degrees, to a right angle of the unedged upper chord 6 or the unedged lower chord 7.
  • the shown edging 10 in the interior of the box profile 5 does not significantly change the geometry or the diameter of the mast segment and enables, for example, already constructed pipe holders to be used that lead through the mast without a structural change being necessary, since the cross section of the mast segment 4a is different Box profile 5 only slightly reduced.
  • the Figure 5 shows the front portion of the mast segment according to Figure 3 with double edging 10 in the thinner sheet metal section 9.
  • the double edging 10 in which the web plate 8 forms Sheet metal sections 9 run towards one another in the longitudinal direction of the mast segment 4a and converge at the mast tip 16 on the mast segment 4a.
  • the edges 10 each end at a distance from the ends 11 of the sheet metal section 9, so that the ends 11, as can be seen, are not edged.
  • the double edges 10 shown here have a simple V-shaped profile cross-section, as well as from Figure 6 can be seen.
  • the Figure 6 forms a sectional view through the in Figure 5 indicated section plane AA through the box profile 5 of the mast segment 4a.
  • the two edges 10 running essentially in the longitudinal direction of the mast segment 4a in the sheet metal sections 9 forming the web plate 8 are directed into the interior of the box section 5.
  • the two edges 10 run towards one another in the longitudinal direction of the mast segment 4a and come together in the region of the mast tip 16.
  • the edges 10 arranged on the web plates 8 have a V-shaped profile cross section. This profile cross-section is easy to produce and effective against the formation of distortions in the sheet metal section 9 of the mast segment 4a that forms the web plate 8.
  • the radius of curvature of the V-shaped profile cross-section is relatively small.
  • the profile angle ⁇ of the box profile 5 in the area of the edges 10 is between the web plate 8 and the upper flange 6 and between the web plate 8 and the lower flange 7 at the double edge 10 of the sheet metal section 9 forming the web plate 8, preferably between 2 and 15 degrees, to one Right angle from the unedged upper chord 6 or the unedged lower chord 7.
  • the bends 10 shown in the interior of the box profile 5 enable pipe holders that have already been designed to be used without the need for structural changes, because the cross section of the mast segment 4a in the box profile 5 is only minimally reduced by the bends 10.
  • curved profile cross-sections are also conceivable, in which the curve of the profile preferably has a constant radius.
  • the folds 10 can all be introduced into the sheet metal section 9 simply before the mast segment 4a is welded by means of forming processes, for example die bending or folding or free bending or stamping or rolling or deep drawing or the like.
  • FIG. 4 is a view of the end area of the portion of the mast segment 4a according to FIG Figure 5 shown in the indicated position C.
  • the ends 11 of the sheet metal section 9 are not edged, that is, they are straight and continuous, so that an approximately right-angled box profile 5 is given at the end of the partial area, which has a simple transition 13 ( Fig. 2 ) to the rear part of the last mast segment 4a ( Fig. 2 ) offers.
  • the Figure 8 shows a view of the web plate 8 with double edging 10, the edging 10 running essentially in the longitudinal direction of the mast segment 4a extending here to the end 11 of the sheet metal section 9.
  • FIG. 9 a detailed view of a web plate 8 with a double longitudinal edge 10 is shown.
  • the two edges 10, which are essentially made in the longitudinal direction, run towards each other and end at a distance from the end 11 of the sheet metal section 9.
  • transverse edges 18 are made in the sheet metal section, which straighten the end 11 of the sheet metal section 9 so that the The end 11 of the sheet metal section 9 is not folded and a simple transition 10 ( Fig. 2 ) allows for unedged sheet metal sections 12. ( Fig. 2 )
  • the Figure 10 shows a sectional view through the in Figure 5 Indicated section plane AA through the box section 5 of the mast segment 4a, the box section 5 here having outwardly directed edges 10.
  • the two folds 10 running essentially in the longitudinal direction of the mast segment 4a in the sheet metal sections 9 forming the web plate 8 are directed out of the box profile 5 of the mast segment 4a.
  • the two edges 10 run towards one another in the longitudinal direction of the mast segment 4a and come together in the region of the mast tip 16.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Lining And Supports For Tunnels (AREA)
EP20164330.1A 2019-03-22 2020-03-19 Mât articulé doté de segments de mât et procédé de fabrication d'un segment de mât Pending EP3715557A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019107456.8A DE102019107456A1 (de) 2019-03-22 2019-03-22 Knickmast mit Mastsegmenten und Verfahren zur Herstellung eines Mastsegmentes

Publications (1)

Publication Number Publication Date
EP3715557A1 true EP3715557A1 (fr) 2020-09-30

Family

ID=69903053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20164330.1A Pending EP3715557A1 (fr) 2019-03-22 2020-03-19 Mât articulé doté de segments de mât et procédé de fabrication d'un segment de mât

Country Status (4)

Country Link
US (1) US11447967B2 (fr)
EP (1) EP3715557A1 (fr)
KR (1) KR20200113175A (fr)
DE (1) DE102019107456A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017208031A1 (de) * 2017-05-12 2018-11-15 Putzmeister Engineering Gmbh Gekröpfter Auslegerarm mit veränderlichem Querschnitt für mobile Betonpumpen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985234A (en) * 1973-12-20 1976-10-12 Creusot-Loire Telescopic boom for a crane
DE19644410A1 (de) 1996-10-25 1998-04-30 Putzmeister Ag Betonverteilermast für Betonpumpen
EP0922664A2 (fr) * 1997-12-12 1999-06-16 Grove U.S. LLC Assemblage de paliers comportant des bosses pour flèche télescopique
JP2001081810A (ja) * 1999-09-13 2001-03-27 Kubota Corp 作業機のブーム
EP2141289A1 (fr) * 2007-04-25 2010-01-06 Komatsu Ltd Flèche de machine de travail
US20170254101A1 (en) * 2014-08-27 2017-09-07 Schwing Gmbh Articulated boom

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038794A (en) * 1975-10-28 1977-08-02 The Warner & Swasey Company Boom assembly
WO2002064485A2 (fr) * 2001-02-12 2002-08-22 Vm Kraner Aps Systeme de manipulation d'objets de preference allonges
US6499612B1 (en) * 2001-07-27 2002-12-31 Link-Belt Construction Equipment Co., L.P., Lllp Telescoping boom assembly with rounded profile sections and interchangeable wear pads
PL1510643T3 (pl) * 2003-09-01 2018-06-29 Forster Profilsysteme Ag Profil i sposób wytwarzania profilu
JP4695355B2 (ja) * 2004-07-15 2011-06-08 新日本製鐵株式会社 溶接部疲労強度に優れる建設機械のブーム・アーム部材およびその製造方法
US9290363B2 (en) * 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
US9592999B2 (en) * 2011-09-20 2017-03-14 Deere & Company Boom apparatus with nose body
DE102017223240A1 (de) * 2017-12-19 2019-06-19 Putzmeister Engineering Gmbh Betonpumpen-Mastarm-Segment mit in Längsrichtung variabler Blechstärke und Verfahren zum Herstellen eines solchen Betonpumpe-Mastarm-Segments

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985234A (en) * 1973-12-20 1976-10-12 Creusot-Loire Telescopic boom for a crane
DE19644410A1 (de) 1996-10-25 1998-04-30 Putzmeister Ag Betonverteilermast für Betonpumpen
EP0922664A2 (fr) * 1997-12-12 1999-06-16 Grove U.S. LLC Assemblage de paliers comportant des bosses pour flèche télescopique
JP2001081810A (ja) * 1999-09-13 2001-03-27 Kubota Corp 作業機のブーム
EP2141289A1 (fr) * 2007-04-25 2010-01-06 Komatsu Ltd Flèche de machine de travail
US20170254101A1 (en) * 2014-08-27 2017-09-07 Schwing Gmbh Articulated boom

Also Published As

Publication number Publication date
DE102019107456A1 (de) 2020-09-24
US20200298298A1 (en) 2020-09-24
US11447967B2 (en) 2022-09-20
KR20200113175A (ko) 2020-10-06

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