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WO2001076797A1 - Scie a chaine pour scier un objet a la surface de l'eau ou dans l'eau, et installation equipee d'une telle scie - Google Patents

Scie a chaine pour scier un objet a la surface de l'eau ou dans l'eau, et installation equipee d'une telle scie Download PDF

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Publication number
WO2001076797A1
WO2001076797A1 PCT/NL2001/000280 NL0100280W WO0176797A1 WO 2001076797 A1 WO2001076797 A1 WO 2001076797A1 NL 0100280 W NL0100280 W NL 0100280W WO 0176797 A1 WO0176797 A1 WO 0176797A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain
link
sawing
grit
links
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.)
Ceased
Application number
PCT/NL2001/000280
Other languages
English (en)
Inventor
Tom Verhoeff
Antonius Leonardus Van De Roer
Theodorus Menno Haak
Theodorus Christianus Maria Vergouw
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.)
SMIT ENGINEERING BV
WIDIA NEDERLAND BV
Original Assignee
SMIT ENGINEERING BV
WIDIA NEDERLAND BV
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 SMIT ENGINEERING BV, WIDIA NEDERLAND BV filed Critical SMIT ENGINEERING BV
Priority to AU2001246955A priority Critical patent/AU2001246955A1/en
Publication of WO2001076797A1 publication Critical patent/WO2001076797A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
    • B23D57/02—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 with chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/18—Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/124—Saw chains; rod-like saw blades; saw cables
    • B28D1/125—Saw chains; rod-like saw blades; saw cables with exchangeable cutter bits or cutter segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/52—Tools specially adapted for working underwater, not otherwise provided for

Definitions

  • Chain for sawing through an object, such as an object located in or on the water, and sawing installation provided with such a chain.
  • the present invention relates to a chain for sawing through an object, in particular an object located in or on the water, such as a ship, drilling platform, bridge, pipeline, etc., the chain being a link chain with links that hook transversely into one another.
  • the chain according to the invention can, however, also be used on land, for example for sawing through a building or part of a building or some other object.
  • the object to be sawn through using the chain according to the invention will in general be made of stone and/or concrete and/or metal, such as steel.
  • a chain of this type is known.
  • a shipwreck lying on the sea bed is usually sawn into pieces by passing an ordinary ship's chain or anchor chain beneath the ship and the two ends of the chain are usually alternately pulled in and paid out from a derrick above water.
  • the chain is then, as it were, laid in a U- shaped loop and is pulled, or to put it more accurately heaved, back and forth exerting forces of many tonnes.
  • sawing through the shipwreck is based on mechanical force; the ship is pulverised or broken at the point of contact with the chain.
  • a chainsaw with which the links are provided, directly or via intermediate pieces, with saw teeth attached thereto is known from forestry and related fields. See, for example, US 3 192 973, US 4 518 022 and US 4 258 763.
  • a chainsaw for shipwrecks appears to be disclosed in SU 757 391.
  • the chain appears to be a sort of ordinary bicycle chain - that is to say it is not of the link type -, which is provided with cutting/sawing teeth.
  • This saw chain has the major disadvantage that it is very expensive and requires a very specific orientation with respect to the shipwreck to be sawn if it is to be able to saw.
  • the use of grit in machining tools, and possibly even for sawing, is known from various sources.
  • the use of diamond as a machining material for machining tools, possibly even for sawing, is also known.
  • diamond cannot be used when sawing shipwrecks because as a consequence of the generation of heat when sawing steel, which also occurs underwater, the diamond lattice collapses to return to an ordinary carbon lattice and is then therefore no longer effective.
  • the aim of the present invention is to provide an improved chain of the type indicated in the preamble, which chain preferably also overcomes the abovementioned disadvantages.
  • the links are provided with a machining surface coating, such as a chipping surface coating.
  • a machining surface coating such as a chipping surface coating.
  • a machining surface coating can be produced particularly well by providing the links with a surface coating containing grit , such as grit consisting of hard metal, cermet, ceramic material or mixtures thereof.
  • grit such as grit consisting of hard metal, cermet, ceramic material or mixtures thereof.
  • Grit grains in particular hard metal grit grains, are relatively hard and have a good machining action.
  • Hard metals, ceramics and cermets are well known in the prior art and have good wear characteristics so that they are used for example as cutting tools.
  • Hard metals, ceramics and cermets in the form of grit also have a good machining action.
  • Hard metals essentially comprise a hard phase of carbides, nitrides and/or borides of one or more of the elements of the IVa-, Va- oder Vla-group of the Periodic System and a binder of the iron group, preferably of Co and/or Ni.
  • Cermets essentially comprise a hard phase which main part consists of a carbonitride of the aforesaid metals.
  • the composition essentially comprises carbides, nitrides, carbonitrides, carbooxinitrides and/or borides of one or more of the elements of the IVa-, Va- oder Vla-group of the Periodic System and a binder of the iron group of the Periodic System, preferably Co and/or Ni.
  • ceramics are known as wear resistant against abrasion and/or corrosion.
  • the grit can be produced by crushing hard metal-, ceramic- or cermet-bodies, including worn cutting tools of hard metal (or sintered carbides), cermets and ceramics, especially for cutting metals, said tools can be uncoated or coated with a layer applied by physical vapour deposition or chemical vapour deposition. Examples for hard metal-, ceramic- or cermet-bodies and the coatings are described in Metall, 45. Jg. Heft 3, March 1991, pages 224-235. These bodies can be shreddered or otherwise crushed to grains, whereafter this grit, especially as an unsorted mixture of the aforesaid materials, can be mixed with suitable brazing materials or other granular additives of hard metals, cermets, ceramics or mixtures thereof.
  • Suitable brazer consist preferably of copper, tin and zinc.
  • the brazer can optionally comprise additives like Al and/or Ag.
  • the grit can be produced by crushing worn hard metal- and/or cermet- and/or ceramic-tools, sieving the crushed grit-mixture to limit the greatest grain size to a maximum diameter which should be preferably less than 6 mm and covering the outer surface of the chain or parts thereof with a dense layer of grits by brazing.
  • the layer thickness (of a single layer) is than about 4 mm to 6 mm whereby advantageously grit-tips can protrude out of the surrounding brazer-surface.
  • two grit-layers embedded in brazer can be applied to the chain or the chain parts to be covered.
  • the total thickness of these two layers is then preferably between 6 mm and 12 mm.
  • the grit grains can have a grain size of 3 to 18 mm, particularly good results being obtained with grit grains having a grain size in the range from 4 to 10 mm.
  • the grit grains do not all have to have an identical grain size, but that, rather than this, this grain size will vary.
  • the machining surface coating can also contain grit grains which have a grain size lying outside the said ranges.
  • the Applicant has found that grains within the said ranges contribute to the machining action particularly well.
  • the average grain size of the grit grains will be within the abovementioned ranges.
  • the grit grains can be applied relatively simply and effectively by fixing these to the links by means of hard soldering.
  • each link consists of two U-shaped end parts with, between them, a body having a peripheral surface which runs in the longitudinal direction of the link concerned, on which peripheral surface the machining surface coating has been applied, wherein said peripheral surfaces of the links together define a surface extending in essentially tubular form in the longitudinal direction of the chain.
  • this also makes it possible appreciably to reduce the forces needed for sawing and for the chain to be fed round as an endless chain in one direction of rotation, that is to say clockwise or anticlockwise.
  • the essentially tubular surface is of circular cross-section. This counteracts certain zones of the machining surface coating always being subjected to greater stress than other zones during sawing.
  • each link comprises an oval, annular chain link and each body comprises two shell parts, the two parts being fixed to the chain link from opposing flat sides of the chain link, for example by welding them thereto.
  • a conventional anchor chain, ship's chain or other type of chain can be taken as the chain and can be converted to a chain according to the invention by fitting two shell parts, with the machining surface coating thereon, on each chain link.
  • a preferred embodiment of the inventive chain has chain links connected with shells as carriers for the aforedescribed coatings. Two shells can be welded with the link, whereafter the entire body consisting of the link and the two shells is wholly or partly covered with a brazed layer of grits.
  • both the shells and the links obtain a machining action and are wear protected as well. If the shells are welded with the links, they can, when worn, be covered again in a manner that the brazing temperature for applying the grit is lower than the melting temperature of the welding material which connects the shells and the links.
  • each body is also very well possible for each body to be produced in one piece and preferably to be tubular, and for the U-shaped end parts to be fixed to opposing ends of the body, preferably by butt- welding.
  • Such an embodiment requires fewer components and consequently, from the structural standpoint, will be less expensive to produce.
  • the links can have a length of at least 15 cm, preferably 30 cm or more and/or the links can have a thickness of at least 2 cm, preferably 3 cm or more.
  • the invention relates to a sawing installation for sawing through an object located in or on the water, such as a ship, drilling platform, bridge, pipeline, etc., comprising:
  • a chain according to the invention which is constructed as an endless chain or at least can be joined to form an endless chain; • at least two return wheel guides for guiding the chain round a bend; and
  • the sawing installation according to the invention comprises one vessel or two vessels, one of the return wheels being provided per vessel.
  • the return wheels can also both be provided onshore if the circumstances indicate this. It is also conceivable for one return wheel to be provided onshore and for the other return wheel to be provided on a vessel. It is also very readily conceivable to position one or more return wheels on the sea bed, or at least to anchor them thereto. It is also pointed out that one or both return wheels can be driven in order to cause the chain to run round.
  • Fig. 1 shows, diagrammatically, a first sawing installation according to the invention, a chain according to the invention and the use thereof;
  • Fig. 2 shows a number of links of a chain according to the invention, links of two different types being shown;
  • Fig. 3 shows a more detailed view of one of the link types from the chain section according to Fig. 2;
  • Fig. 4 shows a perspective view with the components of a link as shown in Fig. 3 taken apart;
  • Fig. 5 shows, diagrammatically, a second sawing installation according to the invention, a chain according to the invention and the use thereof;
  • Figs 6A and 6B show, respectively, a cross-sectional view and a longitudinal view of a further embodiment of a link for a chain according to the invention.
  • Fig 7 shows a perspective view of yet a further embodiment of a link for a chain according to the invention.
  • Fig. 1 shows, diagrammatically, and certainly not with the correct size relationships, a shipwreck 2 lying on the sea bed 1 and two vessels 3 and 4 on the surface of the sea 5.
  • Fig. 1 also shows, diagrammatically, a sawing installation according to the invention, which sawing installation comprises an endless link chain 6 according to the invention, a first return wheel guide 7, a second return wheel guide 8 and a drive 9 acting on the left- hand return wheel guide 8 for running the endless chain 6 round in the clockwise direction or in the anticlockwise direction.
  • the return wheel guides 7 and 8 and the drive 9 are attached to the vessels 3 and 4, respectively, in some way or other.
  • this method of fixing is indicated diagrammatically only by way of example. It should, for example, be clear that it is also very readily possible to mount the return wheel guides 7, 8 and drive 9 directly on the ship or in the ship's hull instead of on a jib construction and then to provide an opening for the chain 6 in the ship's hull. According to the invention it is also very readily conceivable that one or both return wheel guides 7, 8, and optionally the drives 9, are set up onshore if the circumstances demand this or make it possible.
  • the chain 6 will first be pushed through beneath the shipwreck 2 that is lying on the bed 1 of the sea 5. To this end, the chain 6, that is endless during sawing, will in general initially be open, in the sense that it does not yet form a closed loop but is a long length of chain.
  • the chain pushed through beneath the ship in this way it is possible - see Figure 5 - to saw moving back and forth in a conventional manner, by moving the two ends up and down (double-headed arrows 50) from a pontoon or vessel 3,4.
  • the speed of movement of the chain will in this case be greater than 1 m/sec, whilst conventionally this is less than 1 m/minute.
  • chain guides 51 such as return wheels
  • chain guides 51 are provided at the bed 1 on either side of the shipwreck, which chain guides can be fixed to the bed 1 by means of anchors 52, such as so-called suction anchors.
  • anchors 52 such as so-called suction anchors. Since the entire chain does not have a sawing action when sawing up and down (double-headed arrows 50), in the case of the installation and method according to Figure 5 it will be possible for a chain which is provided with the machining surface coating only on that portion that is located close to the bed to suffice. This portion will have a length of at least the sum of the horizontal width of the saw cut and once, preferably twice, the stroke executed by the chain on sawing up and down.
  • the remaining portions of the chain 6 can optionally also be replaced by a cable or cable-like body since they do not have a sawing action.
  • bed guides 51 are not necessarily needed when sawing up and down ( Figure 5). However, these have the advantage that the forces required for moving the chain up and down are lower.
  • the chain 6 In order to saw through the shipwreck 2, in the examples shown in figures 1 and 5, along an essentially vertical saw cut face, the chain 6 will be rotated in one direction respectively moved to and fro at a speed of, in particular, greater than or equal to 1 m/sec.
  • the machining action of the chain according to the invention creates chips having a chip length of some milimeters. In the case of an ordinary ship's chain or anchor chain this will as far as possible not result, or barely result, in a sawing effect unless extremely large forces are exerted to drive the chain round, in which case, however, it will then not be sawing by machining that takes place, but sawing by a sort of pulverisation of the parts of the shipwreck to be sawn through.
  • machining surface coating is then applied in particular to those portions of the elongated loops that extend in the longitudinal direction and preferably not to the ends of the loops, since the links could then have a machining effect on one another as a consequence of hooking into one another.
  • Fig. 2 two embodiments are, as it were, shown alongside one another, that is to say the embodiment with the links 10 and the embodiment with the links 20.
  • the embodiment with the links 10 is illustrated diagrammatically in yet more detail in Figs 3 and 4.
  • the links 10 and 20 have in common that they both consist of two essentially U- shaped end parts 11 and 21, respectively, with, between them, a body 12 and 22, respectively, having a peripheral surface 13 and 23, respectively, running in the longitudinal direction of the link concerned, on which peripheral surface the machining surface coating of grit grains 14 and 24, respectively, is applied.
  • the peripheral surfaces of the links together form an essentially tubular surface extending in the longitudinal direction of the chain. With this arrangement, this essentially tubular surface that is defined by the bodies 12, 22 forms, as it were, the surface having a machining action.
  • this surface 30 having a machining action is flexible in, as it were, all directions.
  • This is extremely favourable for the machining sawing action since, during sawing, the chain is then optionally also able to saw along a curved path transverse to the saw cut. In this way the chain can, as it were, be self-seeking if it encounters a portion that is difficult to saw or less easy to saw, in the sense that the chain can then make a diversion around this point and can seek the route of least resistance.
  • the essentially tubular surface is provided with a circular cross-section. What is achieved in this way is that the chain itself will not have a preferred orientation as far as machining sawing is concerned. Specifically, a preferred orientation could lead to some zones of the tubular surface being subjected to greater stress than others as a consequence of the orientation preference, which is less advantageous for the life of the chains.
  • the cross-sectional surface of the essentially tubular surface to be chosen to be oval, in which case the machining surface coating could then optionally be provided on one side of the oval peripheral surface, whilst the other side is not provided with a machining surface coating.
  • the links 20 are made up of two separate U-shaped parts 21 and a central tubular body 22 (that optionally could also be a solid cylinder at the cost of an increase in weight), which parts 21 and 22 are joined to one another by butt welding or in some other way, for example ordinary welding.
  • butt welding as such is a technique for closing the links that is customary in the production of link chains.
  • a coating of grit grains of a desired and advantageous grain size can then be provided on the external peripheral surface of the body 22 by hard soldering.
  • the link 10 of a chain is essentially constructed around a conventional chain link 15, which consists of a curved wire 17 closed by a butt weld 16 to produce an elongated, more or less oval shape.
  • the link 15 has, as it were, two U-shaped end parts 11 with, between them, two essentially straight parts 18.
  • a plate part 19 is welded in the link 15, which plate part 19 is provided with a passage 40.
  • Such a plate part 19 also has the additional advantage that it reinforces the link and thus prevents the straight link parts 18 being pinched together.
  • the shell parts 41 and 42 are placed against the link 15 from opposing flat sides of the link 15 and are each also provided with a bolt hole 43 and 44, respectively, the ends of which, which open onto the peripheral surface of the body 12, being widened, so that the head 45 of bolt 47 and nut 46 can be removably countersunk therein.
  • the shell parts are provided with ridges 48, 49 which grip around the transverse ends of the plate 19. This is supplementary to the fixing, which is already achieved by making use of the bolt hole 40 in the plate 19.
  • FIG. 6A cross-section
  • Figure 6B longitudinal view
  • the link 60 in Figure 6 is to be regarded as a variant of the link 10 in Figures 3 and 4.
  • the link 60 can once again be a conventional chain link 15, which consists of a curved wire 17 closed by means of a butt weld 16 to produce an elongated, more or less oval shape.
  • the link 60 then has, as it were, two U-shaped end parts 11 with, between them, two essentially straight parts 18.
  • a plate part 19 can optionally be provided to reinforce the link 60.
  • the shell parts 55 are not fixed to the link by means of a bolt construction but are welded thereto by welds 56 running along the straight link parts 18.
  • the welds 56 are preferably on the outward-facing sides of the straight link parts 18 so that, after applying the machining surface coating 53, an approximately flat transition from the one shell part 50 to straight part 18 and to the other shell part 50 is produced.
  • the shell parts 50 are of curved cross-section, and in particular have a cross-section in the shape of a sector of a circle.
  • the plate part 19 does not require a bolt hole in this embodiment and can optionally also be dispensed with.
  • the butt weld 16 is dispensed with. The reason for this is that the welded joins with the shell parts 50 and with the plate part 19 that is optionally provided provide the link 60 with adequate strength.
  • the shell 73 can be made in one piece and, as it were, be slid over the link wire 11, 18 and then welded thereto - which, incidentally, is also conceivable with the embodiment according to Figures 3, 4 and 6 - but can also be constructed in accordance with the embodiment in Figure 6 and then, therefore, be in two parts.
  • the shell parts 73 can then each have a ridge located in the passage 72, which ridges optionally can be welded to one another.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Ocean & Marine Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

L'invention concerne une scie à chaîne pour scier un objet, en particulier dans l'eau ou à la surface de l'eau, du type bateau, plate-forme de forage, pont, pipeline, etc. Il s'agit d'une chaîne à maillons comportant un revêtement de surface d'usinage, qui peut renfermer des grains de sablage, en particulier des grains de sablage au métal dur. Ces grains peuvent avoir une taille comprise entre 4 et 10 mm et on peut les appliquer aux maillons par brasure forte. En particulier, chaque maillon peut comprendre deux extrémités en U et, entre elles, un corps à surface périphérique sachant que le revêtement de surface se déplace dans la direction longitudinale du maillon concerné. L'invention concerne en outre une installation de sciage pour scier un objet situé dans l'eau ou sur l'eau, cette installation faisant appel notamment à une chaîne conformément à la description susmentionnée.
PCT/NL2001/000280 2000-04-07 2001-04-06 Scie a chaine pour scier un objet a la surface de l'eau ou dans l'eau, et installation equipee d'une telle scie Ceased WO2001076797A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001246955A AU2001246955A1 (en) 2000-04-07 2001-04-06 Chain for sawing through an object, such as an object located in or on the water, and sawing installation provided with such a chain

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1014876 2000-04-07
NL1014876 2000-04-07

Publications (1)

Publication Number Publication Date
WO2001076797A1 true WO2001076797A1 (fr) 2001-10-18

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AU (1) AU2001246955A1 (fr)
WO (1) WO2001076797A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022710C2 (nl) * 2003-02-17 2004-08-19 Mammoet Holding B V Werkeiland en werkwijze voor het bergen van een wrak of wrakdelen.
WO2005084901A1 (fr) * 2004-03-05 2005-09-15 Dolmar Gmbh Chaine a scier le beton
WO2008133529A1 (fr) * 2007-04-30 2008-11-06 Beerenberg Frontier As Élément de maillon pour une chaîne utilisée pour couper et chaîne comportant des maillons coupants
NL2002451C2 (en) * 2009-01-26 2010-07-27 Mammoet Holding B V Chain saw.
NL2011615C2 (en) * 2013-10-15 2015-04-16 Mammoet Engineering B V Saw for sawing through an object, notably an offshore object or onshore object.
EP3501675A1 (fr) * 2017-12-21 2019-06-26 Boldan Oy Dispositif de nettoyage pour le nettoyage interne de canalisations de vidange ou d'égouts

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US3192973A (en) * 1964-02-28 1965-07-06 Stearns Mfg Company Flexible saw structure
US4009027A (en) * 1974-11-21 1977-02-22 Jury Vladimirovich Naidich Alloy for metallization and brazing of abrasive materials
GB1475412A (en) * 1973-05-09 1977-06-01 Bosch Gmbh Robert Method of producing a wear-resistant coating of metal on the cutting edge of a metal tool
SU757391A1 (ru) * 1978-09-25 1980-08-27 Vladlen K Gvozdikov Устройство для разделки корпусов затонувших судов 1
US4258763A (en) * 1978-11-20 1981-03-31 Fernando Figueredo Cutting device having a flexible cutting element
JPS5837172A (ja) * 1981-08-28 1983-03-04 Toshiba Tungaloy Co Ltd 被覆工具部品
EP0137711A1 (fr) * 1983-08-29 1985-04-17 General Electric Company Procédé pour la production de grains abrasifs
SU1658875A1 (ru) * 1989-05-04 1991-06-30 Г.Т.Шпаков, В.Г.Шпаков и Е.Г.Шпаков Устройство дл добычи водорослей
JPH08209286A (ja) * 1995-02-02 1996-08-13 Hitachi Tool Eng Ltd チップソー用硬質合金
US5660320A (en) * 1994-11-09 1997-08-26 Mtu Motoren-Und Turbinen-Union Munchen Gmbh Method of manufacturing a metallic component or substrate with bonded coating

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Publication number Priority date Publication date Assignee Title
US3192973A (en) * 1964-02-28 1965-07-06 Stearns Mfg Company Flexible saw structure
GB1475412A (en) * 1973-05-09 1977-06-01 Bosch Gmbh Robert Method of producing a wear-resistant coating of metal on the cutting edge of a metal tool
US4009027A (en) * 1974-11-21 1977-02-22 Jury Vladimirovich Naidich Alloy for metallization and brazing of abrasive materials
SU757391A1 (ru) * 1978-09-25 1980-08-27 Vladlen K Gvozdikov Устройство для разделки корпусов затонувших судов 1
US4258763A (en) * 1978-11-20 1981-03-31 Fernando Figueredo Cutting device having a flexible cutting element
JPS5837172A (ja) * 1981-08-28 1983-03-04 Toshiba Tungaloy Co Ltd 被覆工具部品
EP0137711A1 (fr) * 1983-08-29 1985-04-17 General Electric Company Procédé pour la production de grains abrasifs
SU1658875A1 (ru) * 1989-05-04 1991-06-30 Г.Т.Шпаков, В.Г.Шпаков и Е.Г.Шпаков Устройство дл добычи водорослей
US5660320A (en) * 1994-11-09 1997-08-26 Mtu Motoren-Und Turbinen-Union Munchen Gmbh Method of manufacturing a metallic component or substrate with bonded coating
JPH08209286A (ja) * 1995-02-02 1996-08-13 Hitachi Tool Eng Ltd チップソー用硬質合金

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022710C2 (nl) * 2003-02-17 2004-08-19 Mammoet Holding B V Werkeiland en werkwijze voor het bergen van een wrak of wrakdelen.
WO2005084901A1 (fr) * 2004-03-05 2005-09-15 Dolmar Gmbh Chaine a scier le beton
GB2425985A (en) * 2004-03-05 2006-11-15 Dolmar Gmbh Chainsaw chain for concrete
US7434575B2 (en) 2004-03-05 2008-10-14 Dolmar Gmbh Chainsaw chain for concrete
WO2008133529A1 (fr) * 2007-04-30 2008-11-06 Beerenberg Frontier As Élément de maillon pour une chaîne utilisée pour couper et chaîne comportant des maillons coupants
NL2002451C2 (en) * 2009-01-26 2010-07-27 Mammoet Holding B V Chain saw.
NL2011615C2 (en) * 2013-10-15 2015-04-16 Mammoet Engineering B V Saw for sawing through an object, notably an offshore object or onshore object.
EP3501675A1 (fr) * 2017-12-21 2019-06-26 Boldan Oy Dispositif de nettoyage pour le nettoyage interne de canalisations de vidange ou d'égouts

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