EP3674025A1 - Segment de traitement pour le traitement à sec de matériaux de béton - Google Patents

Segment de traitement pour le traitement à sec de matériaux de béton Download PDF

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Publication number
EP3674025A1
EP3674025A1 EP18216010.1A EP18216010A EP3674025A1 EP 3674025 A1 EP3674025 A1 EP 3674025A1 EP 18216010 A EP18216010 A EP 18216010A EP 3674025 A1 EP3674025 A1 EP 3674025A1
Authority
EP
European Patent Office
Prior art keywords
machining
areas
processing
segment
hard material
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.)
Withdrawn
Application number
EP18216010.1A
Other languages
German (de)
English (en)
Inventor
Marcel Sonderegger
Cliff Toldo
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP18216010.1A priority Critical patent/EP3674025A1/fr
Priority to KR1020217016754A priority patent/KR20210108362A/ko
Priority to PCT/EP2019/025466 priority patent/WO2020141017A1/fr
Priority to EP19828543.9A priority patent/EP3906134A1/fr
Priority to US17/415,342 priority patent/US20220055184A1/en
Publication of EP3674025A1 publication Critical patent/EP3674025A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • 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
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • 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
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/146—Tools therefor

Definitions

  • the present invention relates to a machining segment for a machining tool according to the preamble of claim 1 and a machining tool with such a machining segment according to the preamble of claim 8.
  • Machining tools such as core drill bits, saw blades and abrasive disks, comprise machining segments which are attached to a tubular, disk-shaped or ring-shaped base body, the machining segments being connected to the base body by welding, soldering or gluing.
  • machining segments which are used for core drilling are referred to as drilling segments, machining segments which are used for sawing, saw segments and machining segments which are used for ablation as ablation segments.
  • Machining segments for core drill bits, saw blades and abrasive disks are produced from a matrix material and hard material particles, the hard material particles being able to be statistically distributed or arranged according to a defined particle pattern in the matrix material.
  • the matrix material and the hard material particles are mixed, the mixture is poured into a suitable tool shape and processed further to form the machining segment.
  • a green compact is built up in layers of matrix material, in which the hard material particles are placed in accordance with the defined particle pattern.
  • the processing zone is constructed from a first matrix material and the neutral zone from a second matrix material, which is different from the first matrix material.
  • Machining tools that are designed as a core drill bit, saw blade or cutting disc and are intended for wet machining of concrete materials are only suitable to a limited extent for dry machining of concrete materials.
  • an abrasive concrete sludge is created that supports the machining process and leads to self-sharpening of the machining segments during machining.
  • the matrix material is removed by the abrasive drilling mud and new hard material particles are exposed.
  • no abrasive drilling mud can form that can support the machining process.
  • the hard material particles quickly become dull and the processing rate drops. Due to the lack of concrete sludge, the matrix material wears too slowly and deeper-lying hard material particles cannot be exposed. In known machining tools for wet machining, the matrix material and the hard material particles have similar wear rates.
  • the object of the present invention is to develop a machining segment for a machining tool which enables dry machining of concrete materials, the machining segment being intended to have a high machining rate and the longest possible service life.
  • the processing segment is characterized in that at least one of the processing areas has an overhang T 1 that is greater than 400 ⁇ m compared to the adjacent matrix areas.
  • the upper side of the processing segment is divided into processing areas which comprise the first hard material particles and matrix areas which are constructed from the first matrix material.
  • the "first hard material particles” refer to the hard material particles of the machining segment according to the invention which are arranged in the machining areas on the top of the machining segment.
  • a processing segment in which at least one of the processing areas comprising the first hard material particles has an overhang of more than 400 ⁇ m compared to the matrix areas is suitable for the dry processing of concrete materials.
  • a plurality of processing areas preferably have an overhang T 1 that is greater than 400 ⁇ m in relation to the adjacent matrix areas.
  • All processing areas preferably have a protrusion T 1 that is greater than 400 ⁇ m in relation to the adjacent matrix areas.
  • T 1 the protrusion of the processing tool in the dry processing of concrete materials.
  • the protrusion T 1 of the machining areas of at least 400 ⁇ m relative to the adjacent matrix areas is provided in a front area of the machining areas viewed in the direction of rotation of the machining tool.
  • the processing of concrete materials with a processing segment according to the invention takes place in the front area of the processing areas with the first hard material particles viewed in the direction of rotation.
  • the processing areas should have an overhang of more than 400 ⁇ m compared to the matrix areas in the front area.
  • a front projection T front of the machining areas in the front area of the machining areas is preferably different from a rear area of the machining areas viewed in the direction of rotation of the machining tool.
  • the processing of concrete materials with a processing segment according to the invention takes place in the front area of the processing areas with the first hard material particles viewed in the direction of rotation. Since the rear area of the processing areas viewed in the direction of rotation has only a slight influence on the processing rate, the protrusion of the processing areas in the front area and in the rear area can be different.
  • a back protrusion T back of the machining areas in the rear area of the machining areas is particularly preferred to be less than 400 ⁇ m. Since the processing of concrete materials with a processing segment according to the invention takes place in the front area of the processing areas with the first hard material particles, the rear overhang of the processing areas can take place with regard to a secure fastening of the first hard material particles in the first matrix material.
  • second hard material particles are arranged in the first matrix material, an average particle diameter of the second hard material particles being smaller than an average particle diameter of the first hard material particles.
  • the wear of the first matrix material can be reduced by means of second hard material particles.
  • the second hard material particles can be admixed to the first matrix material as statistically distributed particles, or the second hard material particles are placed in the first matrix material according to a defined second particle pattern. The second hard material particles are placed in particular in the area of the side surfaces of the processing segment.
  • the invention also relates to a machining tool comprising a base body and at least one machining segment according to the invention, which is connected with an underside to the base body of the machining tool.
  • the machining tool is designed as a core drill bit with a tubular base body and a plurality of machining segments.
  • the machining segments are connected with an underside to the tubular base body of the core bit.
  • the machining tool is designed as a core drill bit with a tubular base body and an annular machining segment.
  • the processing segment is connected with a bottom to the tubular base body of the core bit.
  • the machining tool is designed as an annular or disk-shaped saw blade with an annular or disk-shaped base body and a plurality of machining segments.
  • the processing segments are connected with an underside to the ring-shaped or disk-shaped base body of the ring-shaped or disk-shaped saw blade.
  • the machining tool is designed as an abrasive disk with a base body and a plurality of machining segments.
  • the processing segments are connected with an underside to the base body of the removal disk.
  • FIGN. 1A , B show two variants of a first embodiment of a machining tool according to the invention designed as a core drill bit 10A, 10B .
  • the core drill bit 10A shown is hereinafter referred to as the first core drill bit and the one shown in FIG FIG. 1B
  • Core drill bit 10B shown is referred to as the second core drill bit, in addition, the first and second core drill bits 10A, 10B are combined under the term "core drill bit".
  • the first core drill bit 10A comprises a plurality of machining segments 11A, a tubular base body 12A and a tool holder 13A.
  • the machining segments 11A which are used for core drilling, are also referred to as drilling segments and the tubular base body 12A is also referred to as a drilling shaft.
  • the drill segments 11A are firmly connected to the drill shaft 12A, for example by screwing, gluing, soldering or welding.
  • the second core drill bit 10B comprises an annular machining segment 11B , a tubular base body 12B and a tool holder 13B.
  • the ring-shaped machining segment 11B which is used for core drilling, is also referred to as a drilling ring and the tubular base body 12B is also referred to as a drilling shaft.
  • the drill ring 11B is firmly connected to the drill shaft 12B, for example by screwing, gluing, soldering or welding.
  • the core drill bit 10A, 10B is connected to a core drilling device via the tool holder 13A, 13B and is driven by the core drilling device in a direction of rotation 14 about an axis of rotation 15 during drilling operation.
  • the core drill bit 10A, 10B is moved along a feed direction 16 into a workpiece to be machined, the feed direction 16 running parallel to the axis of rotation 15.
  • the core drill bit 10A, 10B creates a drill core and a borehole in the workpiece to be machined.
  • the drill shaft 12A, 12B is in the embodiment of the FIGN. 1A , B formed in one piece and the drilling segments 11A or the drilling ring 11B are firmly connected to the drilling shaft 12A, 12B.
  • the drill shaft 12A, 12B can be formed in two parts from a first drill shaft section and a second drill shaft section, the drill segments 11A or the drill ring 11B being fixedly connected to the first drill shaft section and the tool holder 13A, 13B being fixedly connected to the second drill shaft section.
  • the first and second drill shaft sections are connected to one another via a releasable connecting device.
  • the detachable connection device is, for example, a plug-and-turn connection, as in EP 2 745 965 A1 or EP 2 745 966 A1 described, trained.
  • the formation of the drill shaft as a one-part or two-part drill shaft has no influence on the structure of the drill segments 11A or the drill ring 11B.
  • FIGN. 2A , B show two variants of a second embodiment of a machining tool according to the invention, which is designed as a saw blade 20A, 20B .
  • the saw blade 20A shown is hereinafter referred to as the first saw blade and that in FIG. 2 B Saw blade 20B shown as the second saw blade, in addition, the first and second saw blades 20A, 20B are summarized under the term "saw blade”.
  • the first saw blade 20A comprises a plurality of machining segments 21A, a disk-shaped base body 22A and a tool holder.
  • the processing segments 21A which are used for sawing, are also referred to as saw segments and the disk-shaped base body 22A is also referred to as a master blade.
  • the saw segments 21A are firmly connected to the master blade 22A, for example by screwing, gluing, soldering or welding.
  • the second saw blade 20B comprises a plurality of machining segments 21B , an annular base body 22B and a tool holder.
  • the processing segments 21B which are used for sawing, are also referred to as saw segments and the ring-shaped base body 22B is also referred to as a ring.
  • the saw segments 21B are firmly connected to the ring 22B, for example by screwing, gluing, soldering or welding.
  • the saw blade 20A, 20B is connected to a saw via the tool holder 23A, 23B and is driven by the saw in a direction of rotation 24 about an axis of rotation 25 in the sawing operation. During the rotation of the saw blade 20A, 20B about the axis of rotation 25, the saw blade 20A, 20B is moved along a feed direction, the feed direction being parallel to the longitudinal plane of the saw blade 20A, 20B. The saw blade 20A, 20B creates a saw slot in the workpiece to be machined.
  • FIG. 3rd shows a third embodiment of a machining tool according to the invention, designed as a removal disk 30 .
  • the removal disk 30 comprises a plurality of processing segments 31, a base body 32 and a tool holder.
  • the processing segments 31, which are used for the removal are also referred to as removal segments and the disk-shaped base body 32 is also referred to as a pot.
  • the removal segments 31 are firmly connected to the pot 32, for example by screwing, gluing, soldering or welding.
  • the removal disk 30 is connected to a tool device via the tool holder and is driven in a direction of rotation 34 about an axis of rotation 35 by the tool device in the removal operation. During the rotation of the removal disk 30 about the axis of rotation 35, the removal disk 30 is moved over a workpiece to be machined, the movement being perpendicular to the axis of rotation 35. The removal disk 30 removes the surface of the workpiece to be machined.
  • FIGN. 4A-C show a machining segment 41 according to the invention in a three-dimensional representation ( FIG. 4A ), in a view of an upper side of the processing segment 41 ( FIG. 4B ) and in a view of a side surface of the processing segment 41 ( FIG. 4C ).
  • the processing segment 41 corresponds in structure and composition to the processing segments 11A, 21A, 21B, 31;
  • the machining segment 11B designed as a drilling ring differs from the machining segment 41 in its annular structure.
  • the machining segments can differ from one another in the dimensions and in the curvatures of the surfaces.
  • the basic structure of the machining segments according to the invention is explained on the basis of the machining segment 41 and applies to the machining segments 11A, 11B of FIG FIGN. 1A , B, for the machining segments 21A, 21B of the FIGN. 2A , B and for the processing segment 31 of FIG. 3rd .
  • the processing segment 41 is composed of a processing zone 42 and a neutral zone 43 .
  • the neutral zone 43 is required if the machining segment 41 is to be connected to the base body of a machining tool; in the case of machining segments which are connected to the base body, for example by soldering or gluing, the neutral zone 43 can be omitted.
  • the processing zone 42 is constructed from a first matrix material 44 and first hard material particles 45 and the neutral zone 43 is constructed from a second matrix material 46 without hard material particles.
  • the machining segment 41 is connected to the base body of the machining tool with an underside 47 .
  • the underside of the machining segments is generally flat, whereas the underside of machining segments for sawing has a curvature in order to be able to fasten the machining segments to the curved end face of the annular or disk-shaped base body.
  • the first hard material particles 45 are arranged in the first matrix material 44 according to a defined particle pattern.
  • An upper side 48 of the machining segment 41 opposite the underside 47 is subdivided into machining areas 51 and matrix areas 52 which are constructed from the first matrix material 44.
  • Each processing area 51 comprises a first hard material particle 45 and a first matrix material 44, in which the first hard material particles 45 are embedded.
  • the proportion of the first matrix material 44 in the machining areas 51 can vary. It applies that the proportion of the first matrix material 44 in a processing area 51 increases when the diameter of the first hard material particle 45 decreases. To ensure that the first hard particles 45 fit into the recesses of a special press ram during production, the cross section of the recesses is larger than the maximum diameter of the particle distribution.
  • the processing areas 51 of the processing segment 41 have an overhang T 1 with respect to the matrix areas 52.
  • the processing segment 41 comprises a number of 9 first hard material particles 45 and thus a number of 9 processing areas 51.
  • the number of the first hard material particles 45 and the defined particle pattern in which the first hard material particles 45 are arranged in the first matrix material 44 meet the requirements of the processing segment 41 adjusted.
  • FIGN. 1A B FIGN. 2A Federation FIG. 3rd
  • the processing tools shown according to the invention which are provided for the processing of concrete materials, have a defined direction of rotation. When viewed in the direction of rotation of the machining tool, a distinction can be made between a front area and a rear area of a hard material particle 45.
  • the processing segment 41 can be produced, for example, in a three-stage process: in a first stage, a green compact is built up from the first matrix material 44 and the first hard material particles 45, in a second stage the green compact is compressed into a compact and in a third stage the compact is processed under the influence of temperature or by infiltration to the processing segment 41.
  • the green compact is compacted in the second stage, for example by cold pressing or hot pressing. In cold pressing, the green compact is only exposed to pressure, while the green compact is subjected to temperatures up to approx. 200 ° C in addition to the pressure during hot pressing.
  • the compact is processed in the third stage, for example by sintering or hot pressing, to form the processing segment.
  • the processing areas 51 are surrounded on the upper side 48 of the processing segment by the matrix areas 52 and the protrusion of a processing area 51 is measured with respect to the adjacent matrix areas. All processing areas have a protrusion from the adjacent matrix areas 52. At least one of the processing areas 51 has a protrusion T 1 that is larger than 400 ⁇ m.
  • the direction of rotation 14 of the core drill bit 10A defines a front area 53 and a rear area 54.
  • the processing of concrete materials takes place in the front areas 53 of the processing areas 51 and the processing rate essentially depends on the size of the overhang of the processing areas 51 in the front areas 53.
  • the processing areas 51 have a front-side area 53 Overlap T front and in the rear area 54 a rear overlap T back , which correspond in the exemplary embodiment.
  • the processing areas 51 can have different front overhangs T front and rear overhangs T back .
  • FIGN. 5A-C show some tool components that are used in the production of the machining segment 41 according to the invention.
  • the tool components comprise a lower stamp 61, a die 62 and an upper stamp 63 , the lower stamp 61 also being referred to as the first press stamp and the upper stamp 63 as the second press stamp.
  • FIGN. 5B and 5C show the lower stamp 61 in detail.
  • the green body is built up in the die 62 with a cross-sectional area that corresponds to the desired geometry of the green body.
  • the die 62 has a first opening on the underside, into which the lower punch 61 can be moved, and a second opening on the top, into which the upper punch 63 can be moved.
  • the lower punch 61 has depressions 64 in the pressing surface, the arrangement of which corresponds to the defined particle pattern of the first hard material particles 45. The depressions 64 also determine the dimensions of the processing areas 51 on the top 48 of the processing segments.
  • the green compact is built up from top to bottom.
  • a protective layer of the first matrix material 44 is applied into the depressions of the lower punch 61.
  • a protective layer of a second matrix material can be applied into the depressions 64 of the lower punch 61, the second matrix material being different from the first matrix material 44.
  • matrix materials with different wear properties can be used.
  • the second matrix material serves to protect the lower punch 61 and should be able to be removed as quickly as possible in the finished processing segment in order to expose the first hard material particles 45 which process the substrate.
  • a second matrix material with a higher wear rate than the first matrix material 44 can be removed quickly.
  • the first hard material particles 45 are placed in the depressions 64 of the lower punch 61.
  • the first matrix material 44 is applied to the placed first hard material particles 45, the first matrix material 44 being able to be applied in one layer or in several layers.
  • the first matrix material 44 is filled into the die 62 using a filling shoe until the desired filling height is reached.
  • the finished green compact is compressed under pressure using the lower punch 61 and the upper punch 63 to form the compact.
  • coated first hard material particles can be used.
  • the first matrix material 44 can be used as the shell material for the first hard material particles 45.
  • a second matrix material can be used as the shell material for the first hard material particles 45, the second matrix material being different from the first matrix material 44.
  • matrix materials with different wear properties can be used.
  • the envelope material serves to protect the lower punch 61 and should be able to be removed as quickly as possible in the finished processing segment in order to expose the first hard material particles 45 which process the concrete material.
  • Machining segments in which a protective layer of a second matrix material is applied or a second matrix material is used as the sheathing material for coated first hard material particles 45 additionally have second matrix material in the machining areas 51 or in the machining and matrix areas 51, 52.
  • the second hard material particles can be admixed to the first matrix material 44 as statistically distributed particles, or the second hard material particles are placed in the first matrix material 44 according to a defined second particle pattern. The second hard material particles are placed in particular in the area of the side surfaces of the processing segment 41.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP18216010.1A 2018-12-31 2018-12-31 Segment de traitement pour le traitement à sec de matériaux de béton Withdrawn EP3674025A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18216010.1A EP3674025A1 (fr) 2018-12-31 2018-12-31 Segment de traitement pour le traitement à sec de matériaux de béton
KR1020217016754A KR20210108362A (ko) 2018-12-31 2019-12-20 콘크리트 재료의 건식 가공을 위한 가공 세그먼트
PCT/EP2019/025466 WO2020141017A1 (fr) 2018-12-31 2019-12-20 Segment de façonnage pour le façonnage à sec de bétons
EP19828543.9A EP3906134A1 (fr) 2018-12-31 2019-12-20 Segment de façonnage pour le façonnage à sec de bétons
US17/415,342 US20220055184A1 (en) 2018-12-31 2019-12-20 Machining segment for the dry machining of concrete materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18216010.1A EP3674025A1 (fr) 2018-12-31 2018-12-31 Segment de traitement pour le traitement à sec de matériaux de béton

Publications (1)

Publication Number Publication Date
EP3674025A1 true EP3674025A1 (fr) 2020-07-01

Family

ID=64949117

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18216010.1A Withdrawn EP3674025A1 (fr) 2018-12-31 2018-12-31 Segment de traitement pour le traitement à sec de matériaux de béton
EP19828543.9A Pending EP3906134A1 (fr) 2018-12-31 2019-12-20 Segment de façonnage pour le façonnage à sec de bétons

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19828543.9A Pending EP3906134A1 (fr) 2018-12-31 2019-12-20 Segment de façonnage pour le façonnage à sec de bétons

Country Status (4)

Country Link
US (1) US20220055184A1 (fr)
EP (2) EP3674025A1 (fr)
KR (1) KR20210108362A (fr)
WO (1) WO2020141017A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3898042A1 (fr) * 2018-12-21 2021-10-27 Hilti Aktiengesellschaft Procédé pour fabriquer une ébauche crue et procédé pour transformer l'ébauche crue en segment d'usinage pour l'usinage à sec de matériaux de béton
EP3670041A1 (fr) * 2018-12-21 2020-06-24 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de traitement pour le traitement à sec de matériaux de béton
EP3670037A1 (fr) * 2018-12-21 2020-06-24 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de traitement pour le traitement à sec des matériaux de béton
EP3670036A1 (fr) * 2018-12-21 2020-06-24 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de traitement pour le traitement à sec de matériaux de béton
EP3670040A1 (fr) * 2018-12-21 2020-06-24 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de traitement pour le traitement à sec de matériaux de béton
KR20210107763A (ko) * 2018-12-21 2021-09-01 힐티 악티엔게젤샤프트 그린 본체 생산 방법 및 그린 본체를 콘크리트 재료의 건식 가공을 위한 가공 세그먼트로 추가적으로 프로세싱하기 위한 방법
EP3670038A1 (fr) * 2018-12-21 2020-06-24 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de traitement pour le traitement à sec de matériaux de béton
EP3670035A1 (fr) * 2018-12-21 2020-06-24 Hilti Aktiengesellschaft Procédé de fabrication d'un segment de traitement destiné au forage à sec de matériaux de béton

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Publication number Priority date Publication date Assignee Title
US3898772A (en) * 1972-08-04 1975-08-12 Winter & Sohn Ernst Material removal tool with multiple cutting edges
EP1893378A1 (fr) * 2005-04-14 2008-03-05 Ehwa Diamond Ind. Co., Ltd. Segment de coupe, procede de fabrication de segment de coupe, et outil de coupe comprenant ce segment
KR20130014826A (ko) * 2011-08-01 2013-02-12 김훈동 경도 및 내마모성이 우수한 다이아몬드 공구 및 그 제조 방법
EP2745965A1 (fr) 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
EP2745966A1 (fr) 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
WO2016089031A1 (fr) * 2014-12-02 2016-06-09 김태웅 Procédé pour la fabrication de poudre pour outil diamant et procédé pour la fabrication de tête de coupe à l'aide de celui-ci

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EP3906134A1 (fr) 2021-11-10
US20220055184A1 (en) 2022-02-24
KR20210108362A (ko) 2021-09-02
WO2020141017A1 (fr) 2020-07-09

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