EP1302435B1 - Hochfester teleskopischer Ausleger - Google Patents

Hochfester teleskopischer Ausleger Download PDF

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Publication number
EP1302435B1
EP1302435B1 EP01830652.2A EP01830652A EP1302435B1 EP 1302435 B1 EP1302435 B1 EP 1302435B1 EP 01830652 A EP01830652 A EP 01830652A EP 1302435 B1 EP1302435 B1 EP 1302435B1
Authority
EP
European Patent Office
Prior art keywords
section
telescopic arm
segments
straight
straight segments
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.)
Revoked
Application number
EP01830652.2A
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English (en)
French (fr)
Other versions
EP1302435A1 (de
Inventor
Guelfo Ganzarolli
Luca Perelli
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.)
Hiab Italia Srl
Original Assignee
Effer SpA
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
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Application filed by Effer SpA filed Critical Effer SpA
Priority to TR2018/07546T priority Critical patent/TR201807546T4/tr
Priority to EP01830652.2A priority patent/EP1302435B1/de
Priority to ES01830652.2T priority patent/ES2670924T3/es
Priority to DK01830652.2T priority patent/DK1302435T3/en
Publication of EP1302435A1 publication Critical patent/EP1302435A1/de
Application granted granted Critical
Publication of EP1302435B1 publication Critical patent/EP1302435B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes

Definitions

  • the present invention relates to a high-strength telescopic arm, in particular for mobile cranes, and a process for making the arm.
  • mobile cranes for example mounted on vehicles, have a telescopic arm which can easily be transported in the fully retracted home position and which, in operating conditions can extend to great heights, to lift and move heavy loads.
  • the weight is attached to the end of the crane arm and the arm is subjected mainly to a bending load.
  • the arm section must be of a size which guarantees a safety margin in the presence of the maximum tractive and compression stresses allowed, respectively in the upper and lower zones of the section.
  • a hexagonal section made using high-strength materials does not give the best results in terms of weight, dimensions, cost, rigidity, bending strength, shearing strength, resistance to normal stresses and buckling.
  • a greatly reduced thickness may lead to instability in the shape of the lower panels of the arm, subject to compression, and in the side panels subject to bending and shearing, according to a phenomenon known to experts in the field as buckling of panels with a thin section.
  • This section comprises an upper portion in the shape of an inverted U, formed from a flat upper wall and two side walls extending from top to bottom of the end margins of the upper wall, and a lower portion, welded to the upper portion, having a concave - convex wall, with greater thickness and consisting of adjacent arced segments arranged in sequence.
  • the aim of the present invention is, therefore, to overcome the above-mentioned disadvantages.
  • the aim of the present invention is to provide a telescopic arm with good resistance to shape instability and whose weight is contained.
  • the aim of the present invention is also to provide a telescopic arm which is easy to produce.
  • Another aim of the present invention is to provide a rapid, economical process for the production of a telescopic arm of the above-mentioned type.
  • US 4171597 discloses a crane boom whose telescopic sections have top and bottom flanges and side webs that are provided of a thinner plate than the flanges.
  • the segments at the lower compressed part of the section are only three in number with the flat wider and thicker flange which takes most of the resistance of the section in respect to buckling.
  • GB 2342603 is relating to a manufacturing method for angled steel pipe in which the transversal section of the post member finally resulting from the process disclosed is quadrangular in shape.
  • the numeral 1 denotes a telescopic arm for mobile cranes.
  • the telescopic arm 1 comprises a plurality of coaxial tubes 2 which form the trunks of the arm 1. They have sections 3 with steadily decreasing sizes and are inserted inside one another.
  • the tubes 2 can slide relative to one another and, thanks to suitable drive means, which are not illustrated, can move the arm 1 from the home position to the operating position and vice versa.
  • Each tube 2 consists of a plurality of panels 4 which form the side wall of the tube 2.
  • a generic cross-section 3 of each tube 2 is, therefore, formed by a plurality of straight segments 5 arranged in sequence.
  • Each straight segment 5 has a length b and thickness t1, t2 and is connected to the next segment 5 at one end 6a and to the previous segment 5 at the opposite end 6b, so as to form a closed polygonal section 3.
  • two adjacent segments 5 form an angle ⁇ facing the inside of the section 3 which is less than one hundred and eighty degrees, therefore, the internal edge 7 of the section 3 consists of a concave line.
  • the number of straight segments 5, and therefore the number of panels 4 which form each tube 2 is between seven and ten.
  • the section 3 preferably has an axis of symmetry Y, therefore the segments 5 of which it consists are distributed symmetrically relative to the axis Y.
  • the segments 5 of each section all have the same thickness t1.
  • the ratio between the thickness t1 and length b of the sides of the section is preferably such that it allows a similar safety margin relative to the strength of the zones subject to normal, shearing and bending stresses (that is to say, the sides in particular) and resistance to shape instability (that is to say, buckling).
  • each tube 2 which is part of the telescopic arm 1 is made from a single rectangular sheet 8 of metal with constant thickness t1, also making construction of the sections particularly economical.
  • the sheet of metal 8 is deformed along fold lines 9 parallel with the longitudinal edges 10 of the sheet 8, which are substantially the same length as the tube 2 to be made.
  • the folds are made in such a way as to bring the two longitudinal edges 10 together, until they are touching.
  • Each fold line 9 on the metal sheet 8 delimits two adjacent panels 4 forming dihedral angles ⁇ less than one hundred and eighty degrees or, similarly in a section of metal sheet 8 at a right angle to the longitudinal edges 10, two straight segments 5 of the section 3.
  • the process comprises between seven and ten folding steps. Finally, the edges 10, which are touching, are joined by welding.
  • the section 3 consists of seven straight segments 5, arranged symmetrically relative to an axis of symmetry Y of the section 3 which coincides with the main direction of application of the loads.
  • This seven-sided section 3 is obtained by folding the metal sheet 8 along seven parallel lines 9 to obtain six complete segments 5 and two half-segments 5a, 5b.
  • a second embodiment which is not a part of the invention, illustrated in Figure 5 comprises a section 3 consisting of eight straight segments 5, again arranged symmetrically relative to an axis of symmetry Y of the section 3.
  • the eight-sided section 3 is obtained by folding the metal sheet 8 along eight parallel lines 9 to obtain seven complete segments 5 and two half-segments 5a, 5b.
  • the two half-segments 5a, 5b are brought together and welded along the edges, keeping them in the same plane, so as to form a single segment 5, with a weld seam 11 on the axis of symmetry Y of the section 3.
  • a third embodiment, illustrated in Figure 6 comprises a section 3 consisting of nine straight segments 5, again arranged symmetrically and made using the same procedure as was used for the first two.
  • a fourth embodiment, illustrated in Figure 7 consists of ten segments.
  • the section 3 is obtained by folding the metal sheet 8 along nine parallel lines 9 to obtain ten complete segments 5.
  • the end segments 5 are brought together at a given angle ⁇ and welded along the edges 10a, 10b, leaving the weld seam 11 on the edge.
  • the folding process which is common to all of the embodiments mentioned, is carried out by placing the metal sheet 8 on a die 12 and pressing it along the fold lines 9 with a punch or knife 13.
  • a first set of folds is made in succession, starting from one longitudinal edge 10 towards the inside of the metal sheet, then moving on to a second set, starting from the opposite longitudinal edge 10 and continuing as far as the final fold of the first set.
  • knife 13 can be removed after the last fold, from the gap left by the metal sheet 8 between the two longitudinal edges 10 which are almost touching.
  • Figures 12 to 20 illustrate the folding sequence used to obtain a 10-sided section.
  • the sides are labelled with capital letters from "A” to "J” and are obtained by folding first the right-hand part of the section ( Figures 12 - 15 ), then the left-hand part of the section ( Figures 16 - 19 ), then making a central fold on the side opposite the gap left by the metal sheet.
  • the knife 13 can be removed after the final fold has been made, from the gap left by the metal sheet between the two longitudinal edges which are almost touching. Moreover, since it is straight, the knife 13 is more economical than curved knives and can be used for all sections, whether large or small, because special knife curved shapes are not required for its removal from the profile being folded.
  • the part 14b of the section 3 which supports mainly compression loads can be made with a segment 5 thickness t2 greater than the segment 5 thickness t1 for the remaining part 14a, designed to resist only tractive and shearing loads.
  • At least two of the straight segments 5 have a thickness t2 which is different to the thickness t1 of the remaining segments 5. Therefore, around half of the section 3, considered along the axis of symmetry Y, in an embodiment illustrated in Figure 8 which is not a part of the invention, consists of sheet metal which is thicker than in the other half.
  • the section 3 in the above-mentioned embodiment is obtained from a pair of metal sheets 8a, 8b.
  • Each metal sheet in the pair 8a, 8b is folded along a plurality of fold lines 9, in accordance with the above-mentioned process, without bringing the longitudinal edges 10a, 10b of each sheet 8a, 8b together, but leaving the distance between the two edges 10a of the first sheet 8a equal to the distance between the two edges 10b of the second sheet 8b.
  • the sum of the fold lines 9 on the first and second sheets 8a, 8b must be between five and ten. Therefore, the two sheets 8a, 8b are brought together so that the longitudinal edges 10a of the first sheet and those 10b of the second sheet are touching, forming the tube 2 with polygonal cross-section.
  • edges 10a, 10b of the two sheets 8a, 8b are then welded together.
  • the weld seam 11 is on the lower part of the section 3, subject to compression, because it enhances its stress resistance characteristics.
  • Figures 21 and 22 illustrate two embodiments of crane arm sections, one a six-sided section 15 of the known type, and the other a ten-sided section 16 in accordance with the present invention.
  • Both sections 15, 16 have maximum dimensions within a rectangle labelled 27 which has a width of 305 mm and height of 450 mm. Both sections have the same vertical plane bending inertia coefficient (W - 759 cm 3 ) and the same resistance to buckling.
  • section 15 The overall dimensions of section 15 are height 477.5 mm and width 235 mm.
  • the sides 15a are 288 mm long and the upper and lower sides 15b are 103 mm long.
  • the radius of the sides is 21 mm.
  • section 16 The overall dimensions of section 16 are height 409.4 mm and width 304 mm.
  • the sides 16a are 273 mm long and are at a 115 degree angle to the upper and lower external sides 16b, which are 70 mm long.
  • the external sides 16b in turn are at an angle of 162° 30' to the upper and lower internal sides 16c.
  • the latter sides 16c are at an angle of 165 degrees to one another at the centre line of the section 16.
  • the length of the sides 16c is such that it allows the obtainment of a section 16 with an overall width of 304 mm and is substantially 53 mm.
  • sections 15 and 16 are made using a high-strength material, marketed as Weldox 1100, a registered trade-mark of the company SSAB Oxelosund AB, which has a yield strength of 1100 MPA (N/mm 2 ).
  • section 15 is optimised in such a way that a thickness of at least 7 mm is required to obtain sufficient resistance to yielding and buckling.
  • section 16 is optimised in such a way that a thickness of just 6 mm is required to obtain sufficient resistance to yielding and buckling similar to those of section 15.
  • the 6 mm thickness is sufficient to obtain a similar safety coefficient against buckling of the section sides subjected to normal, shearing and bending stresses.
  • the example also shows how the ten-sided section is around 7% lighter, the area of the ten-sided section being 73.9 cm 2 , compared with 79.6 cm 2 for the area of the six-sided section.
  • the ten-sided section is also 17% more resistant to bending on the horizontal plane, because the ten-sided section is wider, despite remaining within the dimensions of the design in the example.
  • Another possible use for the sections disclosed relates to materials with lower yield strength values, of around 300 - 400 MPA (N/mm 2 ).
  • the present invention brings important advantages. Firstly, the entire section of the telescopic arm in accordance with the present invention allows a reduction in the thicknesses and, therefore, the weight of the arm.
  • the section disclosed guarantees a good safety margin relative to possible instability in the zones which are compressed and those subjected to bending and shearing, because it allows a similar safety coefficient relative both to strength and to the tendency to buckle.
  • the entire process is fast because the time required for the moulding step, during which the metal sheet is folded, is less than the time necessary to obtain semi-finished products with a curved section and two or more weld seams.
  • the process in accordance with the present invention therefore, allows production to be speeded up, with the consequent limitation of costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Vehicle Body Suspensions (AREA)

Claims (4)

  1. Hochfester teleskopischer Ausleger, umfassend eine Vielzahl an koaxialen Abschnitten (3) mit stetig abnehmenden Größen, die ineinander eingefügt sind und relativ zueinander verschoben werden können und dank geeigneter Antriebsmittel den Ausleger (1) von der Ausgangsstellung in die Betriebsstellung und umgekehrt bewegen können, wobei ein jeder Abschnitt (3) im Querschnitt einen oberen Teil (3a), einen unteren Teil (3b) und Seitenteile (3c, 3d) dazwischen umfasst, wobei ein jeder Abschnitt (3) eine Vielzahl an geraden Segmenten (5) umfasst, die nacheinander angeordnet sind, wobei ein jedes gerade Segment (5) eine Länge (b), eine Dicke (t1) und zwei Enden (6a, 6b) aufweist, wobei ein jedes Ende (6a, 6b) eines jeden geraden Segments (5) mit einem Ende (6a, 6b) eines angrenzenden geraden Abschnitts (5) verbunden ist, um einen geschlossenen Abschnitt (3) zu formen, dadurch gekennzeichnet, dass alle geraden Segmente (5) dieselbe Dicke (t1) aufweisen, dass er zudem am unteren Teil des einer Kompression ausgesetzten Abschnitts nur eine Schweißnaht (11) umfasst, die zwei angrenzende gerade Segmente (5) oder zwei Halbsegmente (5a, 5b) zusammenfügt, formend ein einzelnes Segment (5) und bereitgestellt auf der Symmetrieachse (Y) des Abschnitts, dass die Zahl der geraden Segmente (5) des unteren Teils des Abschnitts größer oder gleich drei ist und dass er in vollem Umfang vollständig aus einem Material mit einer Biegefestigkeit von mehr als 800 MPA (N/mm2) besteht.
  2. Hochfester teleskopischer Ausleger nach Anspruch 1, dadurch gekennzeichnet, dass die Zahl der geraden Segmente (5) zwischen sieben und zehn beträgt.
  3. Hochfester teleskopischer Ausleger nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwei angrenzende gerade Segmente (5) einen Winkel (α) formen, gegenständig zur Innenseite des geschlossenen Abschnitts (3), der kleiner oder gleich hundertachtzig Grad ist.
  4. Hochfester teleskopischer Ausleger nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die geraden Segmente (5) symmetrisch relativ zu einer Symmetrieachse (Y) des Abschnitts (3) in dessen Ebene angeordnet sind.
EP01830652.2A 2001-10-16 2001-10-16 Hochfester teleskopischer Ausleger Revoked EP1302435B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
TR2018/07546T TR201807546T4 (tr) 2001-10-16 2001-10-16 Yüksek dayanımlı bir teleskopik kol.
EP01830652.2A EP1302435B1 (de) 2001-10-16 2001-10-16 Hochfester teleskopischer Ausleger
ES01830652.2T ES2670924T3 (es) 2001-10-16 2001-10-16 Brazo telescópico de alta resistencia
DK01830652.2T DK1302435T3 (en) 2001-10-16 2001-10-16 High-strength telescopic arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01830652.2A EP1302435B1 (de) 2001-10-16 2001-10-16 Hochfester teleskopischer Ausleger

Publications (2)

Publication Number Publication Date
EP1302435A1 EP1302435A1 (de) 2003-04-16
EP1302435B1 true EP1302435B1 (de) 2018-03-07

Family

ID=8184739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01830652.2A Revoked EP1302435B1 (de) 2001-10-16 2001-10-16 Hochfester teleskopischer Ausleger

Country Status (4)

Country Link
EP (1) EP1302435B1 (de)
DK (1) DK1302435T3 (de)
ES (1) ES2670924T3 (de)
TR (1) TR201807546T4 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005001211A1 (ja) * 2003-06-30 2005-01-06 Hitachi Construction Machinery Co., Ltd. 建設機械用作業腕及びその製造方法
ITMO20040009A1 (it) * 2004-01-16 2004-04-16 Manitou Costr Ind Srl Braccio telescopico per carrello elevatore.
EP2185461B1 (de) * 2007-09-05 2013-01-30 Palfinger AG Profilform für einen kranarm
RU2497745C2 (ru) * 2007-09-05 2013-11-10 Палфингер Аг Форма профиля для крановой секции
DE102010010008A1 (de) * 2010-03-02 2011-09-08 Ferro Umformtechnik Gmbh & Co. Kg Verfahren zur Herstellung eines geschweißten Hohlprofils sowie geschweißtes Hohlprofil
IT201800007213A1 (it) * 2018-07-16 2020-01-16 Carlo Rosso Braccio telescopico e veicolo semovente provvisto di tale braccio
EP3722246B1 (de) * 2019-04-08 2024-09-18 Hiab AB Teleskopische kranauslegerabschnitt, teleskopisch ausfahrbarer kranausleger und hydraulikkran
CN113353818B (zh) * 2021-04-22 2024-01-02 武汉船用机械有限责任公司 伸缩臂的制作方法
CN114160621A (zh) * 2021-12-20 2022-03-11 江苏神通阀门股份有限公司 一种地坑过滤器滤筒折弯方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD65647A5 (de) 1966-06-30 1969-02-20 Gottwald Kg Leo Teleskopartig ein- und ausfahrbarer kranausleger
US4171597A (en) 1976-01-29 1979-10-23 Coles Cranes Limited Crane boom and telescopic section for it
EP0376414A1 (de) 1988-12-23 1990-07-04 Albert Fabius Tragarm
JPH0572887U (ja) 1992-03-11 1993-10-05 新明和工業株式会社 多段ブーム
JPH0940380A (ja) 1995-07-28 1997-02-10 Aichi Corp 多角形ブーム
JPH11158908A (ja) 1997-12-02 1999-06-15 Kubota Corp 作業機のブーム構造及びブーム部材の製造方法
GB2343174B (en) 1997-07-15 2001-10-31 Komatsu Mfg Co Ltd Boom of bucket type excavator and producing method thereof

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Publication number Priority date Publication date Assignee Title
US4459786A (en) * 1981-10-27 1984-07-17 Ro Corporation Longitudinally bowed transversely polygonal boom for cranes and the like
DE19624312C2 (de) * 1996-06-18 2000-05-31 Grove Us Llc Teleskopausleger für Fahrzeugkrane
GB2342603B (en) * 1997-01-30 2000-09-20 Nakajima Steel Pipe Co Ltd Manufacturing method for angled steel pipes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD65647A5 (de) 1966-06-30 1969-02-20 Gottwald Kg Leo Teleskopartig ein- und ausfahrbarer kranausleger
US4171597A (en) 1976-01-29 1979-10-23 Coles Cranes Limited Crane boom and telescopic section for it
EP0376414A1 (de) 1988-12-23 1990-07-04 Albert Fabius Tragarm
JPH0572887U (ja) 1992-03-11 1993-10-05 新明和工業株式会社 多段ブーム
JPH0940380A (ja) 1995-07-28 1997-02-10 Aichi Corp 多角形ブーム
GB2343174B (en) 1997-07-15 2001-10-31 Komatsu Mfg Co Ltd Boom of bucket type excavator and producing method thereof
JPH11158908A (ja) 1997-12-02 1999-06-15 Kubota Corp 作業機のブーム構造及びブーム部材の製造方法

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
"Big boom for a new crane", NEW SCIENTIST, 21 February 1980 (1980-02-21), pages 569, XP055535267
"Grobblech - Herstellung und Anwendung", STAHL BROSCHURE - DOKUMENTATION 570, pages 1 - 110
.: "50 Argumente die für Palfinger sprechen", PALFINGER FLYER
HAMME ET AL: "Einsatz hochfester Baustähle im Mobilkranbau", STAHLBAU, vol. 69, no. 4, 2000, pages 1 - 11, XP055535254
HELLER ET AL.: "Moderne hochfeste Stähle im Nutzfahrzeug- und Mobilkranbau - Herstellung, Verarbeitung und Anwendung", ATZ AUTOMOBILTECHNISCHE ZEITSCHRIFT, vol. 100, no. 9, 1998, pages 664 - 668, XP055535248
HUBER: "Tragfähigkeit von Teleskopen", FORDERN UND HEBEN, vol. 22, no. 3, 1972, pages 125 - 127, XP009065538

Also Published As

Publication number Publication date
DK1302435T3 (en) 2018-06-14
ES2670924T3 (es) 2018-06-04
EP1302435A1 (de) 2003-04-16
TR201807546T4 (tr) 2018-06-21

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