WO1997012713A1 - Outil diamante pour couper une structure armee et procede de coupe de structure armee - Google Patents

Outil diamante pour couper une structure armee et procede de coupe de structure armee Download PDF

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Publication number
WO1997012713A1
WO1997012713A1 PCT/JP1996/002842 JP9602842W WO9712713A1 WO 1997012713 A1 WO1997012713 A1 WO 1997012713A1 JP 9602842 W JP9602842 W JP 9602842W WO 9712713 A1 WO9712713 A1 WO 9712713A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
diamond
reinforced structure
graphite particles
wire saw
Prior art date
Application number
PCT/JP1996/002842
Other languages
English (en)
Japanese (ja)
Inventor
Akifumi Hoshino
Taku Murakami
Original Assignee
Komatsu Ltd.
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 Komatsu Ltd. filed Critical Komatsu Ltd.
Publication of WO1997012713A1 publication Critical patent/WO1997012713A1/fr

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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
    • 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
    • B23D61/185—Saw wires; Saw cables; Twisted saw strips
    • 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
    • B28D1/025—Use, recovery or regeneration of abrasive mediums
    • 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

Definitions

  • the present invention relates to a diamond drill for cutting a reinforced structure suitable for cutting a composite structure of an iron-based member and a hard member such as a concrete, and a cutting method.
  • diamond tools have been used for cutting and grinding high-hardness inorganic members such as concrete and glass. Also, when cutting a composite structure of an iron-based member and a high-hardness member, such as a reinforced concrete, a diamond tool is frequently used due to its highest hardness.
  • beads 53 embedded diamond abrasive grains 51 with a binder 52 such as nickel or cobalt are fixed to the outer periphery of a metal sleeve 55 and a metal
  • a wire saw 150 in which a number of sleeves 55 pass through the outer periphery of the wire 57 at predetermined intervals.
  • the wire saw 50 has a groove 59 formed between the bead 53 and the capacitance sensor 56.
  • the diamond abrasive grains 51 in contact with the non-cut body become hot due to the cutting resistance and friction during cutting.
  • the exothermic temperature is equal to or higher than the A
  • transformation point of the steel as the reinforcing steel carbon from the diamond abrasive grains 51 diffuses into the steel, and the amount of diffusion rapidly increases as the exothermic temperature rises.
  • the consumption of the diamond abrasive grains 51 is increased and the life of the gasoline 50 is shortened.
  • it is necessary to reduce the cutting speed but there is a problem that the cutting time is significantly increased.
  • beads 53 and cutting tools 61 are used as shown in FIG. 7, beads 53 and cutting tools 61 are used.
  • wire-to-60 are known (for example, Japanese Utility Model No. 1-11019).
  • the cutting tool 61 embeds ceramics-based hard particles 63 such as tungsten carbide or boron nitride using a synthetic resin as a binder 65.
  • the wire saw 60 is wound around the outer periphery of a reinforced structure 70 that is a non-cut body, and is rotated by a driving device 69 while being cooled by the cutting fluid from the nozzle 67. Then cut.
  • tension is generated in the wire saw 60 by pulling the driving device 69 with the tension wire 71 fixing one end to the anchor 73.
  • the beads 53 mainly cut the concrete and the carbide particles 65 mainly cut the reinforcing bar, the consumption of the diamond abrasive grains 51 is reduced.
  • a tool for forming an amorphous carbon layer on the surface of diamond abrasive grains is known (for example, Japanese Patent Application Laid-Open No. Hei 4-190001, and Japanese Patent Application Laid-Open No. Hei 6-163606).
  • this tool good wear resistance is achieved in steel cutting by reducing the thickness of the high-hardness amorphous carbon layer from the submicron to several tens of meters.
  • the amorphous carbon layer is thin, the consumption of carbon is generated at an early stage, and diamond rebar cutting is mainly used, and the tool life is insufficient.
  • the amorphous carbon layer is thick, the carbon layer is likely to be separated due to cutting and cutting of the reinforcing bar and the concrete, so that the life is similarly insufficient. Disclosure of the invention
  • the present invention has been made to solve the problems of the related art, It is an object of the present invention to provide a diamond tool for cutting a reinforced structure and a cutting method capable of improving the service life and obtaining appropriate workability when cutting a composite structure made of a material and a hard member such as a concrete. Aim.
  • the diamond drill for cutting a reinforced structure is a diamond drill for cutting a reinforced structure having an abrasive layer formed by bonding diamond abrasive grains with a binder, wherein the abrasive layer has a diamond abrasive. It is an abrasive layer formed by bonding particles and graphite particles with a binder. In addition, the graphite particles contain fi in the abrasive layer.
  • It is preferably from 2 to 30% by volume.
  • the diamond abrasive grains react with the rebar, and solid-dissolve and diffuse into the rebar, because the surface temperature of the diamond abrasive grains increases by cutting the non-cutting rebar structure.
  • the graphite particles fall off, chip, or become abrasion powder from the abrasive grain layer, and are supplied to the contact portion between the reinforced structure and the diamond abrasive grains being cut.
  • the graphite particles having low hardness form a thin film at the contact portion, thereby reducing direct contact between the diamond abrasive grains and the reinforcing steel.
  • the reaction between the diamond abrasive grains and the reinforcing steel is reduced due to the presence of the graphite thin film which is hardly chemically reacted with the reinforcing steel, so that the consumption of the diamond abrasive grains is reduced.
  • This reduction in wear makes it possible to extend the life of diamond tools.
  • the life can be improved and the strength of the abrasive layer can be appropriately adjusted, so that work can be performed at a useful cutting speed.
  • a method for cutting a reinforcing bar structure is a method for cutting a reinforcing bar structure that cuts a reinforcing bar structure by supplying a cutting fluid near a contact portion between the reinforcing bar structure and the diamond tool. It is characterized in that the supplied cutting fluid contains graphite particles. Further, it is preferable that the content of the graphite particles is 2 to 20 times S% with respect to the supplied cutting fluid.
  • the graphite particles in the cutting fluid are supplied to the contact portion between the reinforced structure and the diamond abrasive grains.
  • an effect similar to that of the above-described diamond tool is obtained.
  • FIG. 1 is a sectional view of a wire saw according to a first embodiment of the present invention
  • FIG. 2 is an explanatory diagram of the cutting device according to the first embodiment
  • FIG. 3 is a sectional view of a jack according to a second embodiment of the present invention.
  • FIG.4A is a front view of a blade according to a fourth embodiment of the present invention.
  • FIG. 4B is a view taken along arrow 4 B— 4 B in FIG. 4A.
  • Fig. 5 is an explanatory diagram of the cutting test situation of the blade according to the fourth embodiment
  • Figure 6 is a cross-sectional view of a conventional wire saw.
  • Fig. 7 is a sectional view of another conventional wire saw.
  • FIG. 8 is an explanatory view of a conventional cutting apparatus.
  • FIG. 1 shows a wire saw 10 which is an example of the diamond dressing tool of the first embodiment.
  • a large number of beads 8 are inserted at predetermined intervals around the outer periphery of the wire 57, and a rubber spacer 6 is fixed between the metal sleeves 5, 5.
  • the beads 8 are composed of a metal sleeve 5 and an abrasive layer 1 fixed to the outer periphery of the metal sleeve 5.
  • the abrasive layer 1 is embedded with a binder 4 in which diamond abrasive particles 2 and graphite particles 3 are dispersed.
  • the groove 7 formed between the abrasive grains 1 and 1 serves as a passage for supplying the cutting fluid and also serves as a passage for discharging the cutting powder.
  • the S content of the graphite particles 3 in the abrasive layer 1 may be 2 to 30% by volume. However, from the viewpoints of more appropriate strength of the abrasive layer 1 and reduction of consumption of the diamond abrasive particles 2, 5-1 5% by volume is preferred. Further, the graphite particles 3 are mixed with the diamond abrasive grains 2 and the mixing agent 4 and the like and dispersed in the binder 4 before the formation of the abrasive layer 1. Therefore, the starting material of the graphite particles 3 has a different degree of crushing depending on the mixing conditions, and has a general size. Graphite powder can be used.
  • the graphite powder size is preferably about submicron to about 100 m, and more preferably about 1 to 40 m in consideration of the dispersibility, the strength of the abrasive layer 1 and the like.
  • the binder 4 may be a general cobalt-based binder, and a carbide such as tungsten carbide and a metal powder such as copper and nickel may be added as necessary.
  • FIG. 2 shows a cutting device 11 to which a wire saw 10 is applied.
  • the cutting device 11 includes a driving device 12, a tension holding device 14, a guide pulley 15, and a cutting fluid supply device 16. I have.
  • the wire saw 10 is mounted on the drive device 1 2 and the tension holding device
  • the drive unit 12 is pulled through the tension wire 13 by 14 force.
  • the wire saw 10 wound around the outer periphery of the reinforced structure 70 is driven to rotate by the driving device 12 under a predetermined tension, and performs a cutting operation of the reinforced structure 70.
  • a general water-soluble cutting fluid is supplied from the nozzle 17 of the cutting fluid supply device 16 to the vicinity of the contact portion between the reinforcing bar structure 70 and the wire saw 10 to cool the wire saw 10. are doing.
  • the main specifications of the abrasive layer 1 are as follows: the particle size of the diamond abrasive particles 2: 40/50, the concentration: 20, the average particle size of the graphite particles 3: about 3 / m, the content of the graphite particles 3: 6% by volume, Mixture 4: Cobalt-based binder.
  • the wire saw 10 has a bead 8 outer diameter: 10 mm, a bead 8 length: 6 mm, and a bead 8 pitch: 25 mm.
  • the main cutting conditions are a speed of the wire saw 10: 25 mZ sec, a tension of the tension wire 13: 70 kgf, and a cutting fluid supply amount: 10 liter / min.
  • the non-cutting reinforced structure 70 is a reinforced concrete block with a reinforcement ratio of 3%. Cutting result, wire saw 10 per 1 m The cutting life was about 0.7 m 2 m, assuming the cutting area as the cutting area of the reinforcing steel structure 70 to be cut.
  • FIG. 3 shows a wire saw 20 of the present embodiment.
  • the abrasive 1a of the wire saw 20 has a configuration in which diamond abrasive grains are dispersed and embedded in a binder 4 and does not contain graphite particles 3 (see FIG. 1). And different.
  • the cutting device to which the wire saw 20 is applied is almost the same as the cutting device 11 of the first embodiment shown in FIG. 2, but the grinding fluid supplied from the cutting fluid supply device 16 is different.
  • the grinding fluid of this embodiment contains graphite particles in the water-soluble cutting fluid.
  • the content of graphite particles in the cutting fluid and the supply of the graphite particle-containing cutting fluid vary depending on cutting conditions and the like. For example, when the graphite particle content is 2 to 20% by weight and the supply amount is 5 to 30% Little / min.
  • the graphite-containing cutting fluid is supplied from the nozzle 17 of the cutting fluid supply device 16 to the vicinity of a contact portion between the reinforced structure 70 and the wire saw 10.
  • the graphite particles have the same function as the graphite particles 3 of the first embodiment when cut, and the graphite powder having the above size is used.
  • a second cutting example in the second embodiment will be described.
  • the main specifications of the abrasive layer 1a are the same as those of the abrasive layer 1 of the first cutting example except that the graphite layer 3 is not contained.
  • the outer diameter of the beads 8 of the wire saw 20 is the same as that of the wire saw 10 of the first cutting example.
  • the main cutting conditions and the non-cutting body are the same as in the first cutting example, except that the cutting fluid contains 10% by weight of graphite particles having an average particle size of 3 m. As a result of the above cutting, the cutting life of the wire saw 20 was about 0.8 m 2 / m.
  • the first and second embodiments are examples in which the wire saw 10 or the cutting fluid contains the graphite particles 3, but as comparative examples, cutting examples in which neither of them contains the graphite particles will be described. That is, the cutting life of the wire saw 20 was about 0.3 m 2 Zm as a result of cutting it using a grinding fluid and a wire saw 20 containing no graphite particles in the same manner as in the first cutting example. It has been found that the present invention containing particles has excellent properties.
  • a third embodiment according to the present invention will be described.
  • the present embodiment is an example in which the wire saw 10 of the first embodiment containing graphite particles 3 is combined with the cutting fluid of the second embodiment containing graphite particles.
  • the specifications, cutting conditions and cutting conditions of the first cutting example are the same except that the cutting fluid contains 10% by weight of graphite particles having an average particle diameter of 3 m (same as the second cutting example). Same as the uncut body.
  • the cutting life of the wire saw 110 was about 0.9 m 2 Zm.
  • FIG. 4A shows a blade 30 serving as a diamond tool of the fourth embodiment.
  • a large number of segments 8 a are fixed to the outer periphery of a disk-shaped metal base 31.
  • an abrasive layer 1 in which diamond abrasive particles 2 and graphite particles 3 are bonded with a binder 4 is fixed on a metal member 32.
  • the content of the graphite particles 3 in the abrasive layer 1 is the same as that of the wire saw 10 of the first embodiment.
  • FIG. 5 shows a cutting test condition using a grinder 35, in which a blade 30 having an outer diameter of 14 inches is used.
  • the main specifications of the abrasive layer 1 are as follows: the particle size of the diamond abrasive particles 2: 50 to 50, the degree of concentration: 30, the average particle size of the graphite particles 3: about 3 m, the content of the graphite particles 3: 8 Fertility, Binder 4: Cobalt-based binder.
  • the main cutting conditions are: peripheral speed of blade 30: 40 m / sec, feed speed: 1.5 mZmin, depth of cut: 10 cm / path, cutting fluid: general water-soluble cutting fluid, cutting Liquid supply amount: 15 liter min.
  • the reinforcement arrangement ratio of the non-cutting body 70 is 2%.
  • a blade similar to blade 30 was used except that graphite particles 3 were not contained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

La présente invention concerne un outil diamanté pour couper une structure armée et un procédé de coupe de structure armée permettant de réduire la consommation d'abrasif au diamant, prolongeant ainsi la durée de vie de l'outil diamanté. La couche d'abrasif (1) de l'outil diamanté (10) destiné à couper une structure armée est constituée de particules de diamant (2) et de particules de graphite (3) qui sont liées ensemble au moyen d'un liant (4). La teneur volumique préconisée de graphite dans la couche d'abrasif se situe entre 20 % et 30 %. L'invention concerne également un procédé de coupe d'une structure armée consistant à couper une structure armée (70) tout en apportant un liquide de coupe contenant des particules de graphite au voisinage de la zone de contact entre la structure armée (70) et l'outil diamanté (20). La teneur massique préconisée de graphite dans le liquide de coupe se situe entre 2 % et 20 %.
PCT/JP1996/002842 1995-10-03 1996-09-30 Outil diamante pour couper une structure armee et procede de coupe de structure armee WO1997012713A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7/278221 1995-10-03
JP27822195A JPH09103916A (ja) 1995-10-03 1995-10-03 鉄筋構造物切断用ダイヤモンド工具及び切断方法

Publications (1)

Publication Number Publication Date
WO1997012713A1 true WO1997012713A1 (fr) 1997-04-10

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Application Number Title Priority Date Filing Date
PCT/JP1996/002842 WO1997012713A1 (fr) 1995-10-03 1996-09-30 Outil diamante pour couper une structure armee et procede de coupe de structure armee

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JP (1) JPH09103916A (fr)
WO (1) WO1997012713A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109397956A (zh) * 2018-12-29 2019-03-01 泉州市至真工具科技有限公司 一种金刚石石材雕刻刀

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6111382B2 (ja) * 2012-01-24 2017-04-12 株式会社 アクティブ 鉄筋コンクリートの切削方法
JP5861226B2 (ja) * 2014-01-22 2016-02-16 ヒョヨン キム ダイヤモンドワイヤーソー
JP2015136757A (ja) * 2014-01-22 2015-07-30 ヒョヨン キム ダイヤモンドワイヤーソー
CN110366468A (zh) * 2017-02-08 2019-10-22 贝卡尔特公司 具有降低的扁平化行为的锯珠和包括这种锯珠的锯帘线

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01110019U (fr) * 1988-01-21 1989-07-25
JPH02212074A (ja) * 1989-02-10 1990-08-23 Hitachi Koki Co Ltd 切削用ダイヤモンド砥石
JPH06344133A (ja) * 1993-06-03 1994-12-20 Tsubota Tekunika:Kk 板状工作物の熱切断加工におけるドロス回収方法およびその装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01110019U (fr) * 1988-01-21 1989-07-25
JPH02212074A (ja) * 1989-02-10 1990-08-23 Hitachi Koki Co Ltd 切削用ダイヤモンド砥石
JPH06344133A (ja) * 1993-06-03 1994-12-20 Tsubota Tekunika:Kk 板状工作物の熱切断加工におけるドロス回収方法およびその装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109397956A (zh) * 2018-12-29 2019-03-01 泉州市至真工具科技有限公司 一种金刚石石材雕刻刀

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Publication number Publication date
JPH09103916A (ja) 1997-04-22

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