KR200484982Y1 - Mining bit - Google Patents

Mining bit Download PDF

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Publication number
KR200484982Y1
KR200484982Y1 KR2020160001509U KR20160001509U KR200484982Y1 KR 200484982 Y1 KR200484982 Y1 KR 200484982Y1 KR 2020160001509 U KR2020160001509 U KR 2020160001509U KR 20160001509 U KR20160001509 U KR 20160001509U KR 200484982 Y1 KR200484982 Y1 KR 200484982Y1
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KR
South Korea
Prior art keywords
mining
head portion
bit
fixing groove
shank
Prior art date
Application number
KR2020160001509U
Other languages
Korean (ko)
Other versions
KR20170003387U (en
Inventor
배영환
Original Assignee
동림산업 주식회사
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 동림산업 주식회사 filed Critical 동림산업 주식회사
Priority to KR2020160001509U priority Critical patent/KR200484982Y1/en
Publication of KR20170003387U publication Critical patent/KR20170003387U/en
Application granted granted Critical
Publication of KR200484982Y1 publication Critical patent/KR200484982Y1/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma welding
    • B23K10/027—Welding for purposes other than joining, e.g. build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0086—Welding welding for purposes other than joining, e.g. built-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K5/00—Gas flame welding
    • B23K5/18—Gas flame welding for purposes other than joining parts, e.g. built-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

The present invention prevents abrasion between the head portion and the mining bite, protects the head portion by increasing the surface hardness of the head portion in the vicinity of the mining bite, suppresses or prevents occurrence of cracks in the head portion, And a bit for digging that can be done.
To this end, the bit for digging comprises a shank portion coupled to a mining tool for mining, a support portion extending from the shank portion with a diameter greater than that of the shank portion, a retaining groove extending from the support portion with a diameter equal to or smaller than the support portion, And a welding portion welded to the outer circumferential surface of the head portion so as to surround the mining bit and the mining bit, the end portion of which is brazed and welded to the fixing groove so as to protrude from the head portion.

Description

Mining bit {MINING BIT}

The present invention relates to a bit for digging, more specifically, to prevent abrasion between a head portion and a mining bit, to protect the head portion by increasing the surface hardness of the head portion in the vicinity of the mining bit, To a mining bit capable of restraining or preventing occurrence of a gap in the fixing groove.

In general, mining, excavation, road repacking work is done by propelling rotary cutting bits against the workpiece. The rotary cutting bit is mounted on a driven support such as a rotary drum or a fixed beam and pressed against the mating member.

For example, the rotary cutting bit has a cutting tip brazed to the distal end surface of the steel shank. The shank is attached to the holder by a support sleeve. The support sleeve is prevented from escaping in the axial direction in the holder. At this time, the rotary cutting bit basically has magnetic polishing ability.

Accordingly, there is a problem that the conventional rotary cutting bit is broken around the cutting tip, and the cutting tip is separated from the rotary cutting bit.

Japanese Laid-open Patent Publication No. 1997-512071 (entitled "Rotatable Cutting Bit and Bit Holder," published on Dec. 2, 1997)

The object of the present invention is to solve the problems of the prior art, and it is an object of the present invention to prevent abrasion between a head part and a mining tool, to protect the head part by increasing the surface hardness of the head part around the mining tool, And a bit for digging that can suppress or prevent the occurrence of a gap in the fixing groove.

According to a preferred embodiment of the present invention, the mining bit of the present invention includes a shank portion coupled to a mining tool for mining; A support extending from the shank at a larger diameter than the shank; A head portion extending from the support portion at a diameter equal to or smaller than that of the support portion and having a fixing groove recessed at an end thereof; A digging bobbin brazed to the fixing groove so that the end portion protrudes from the head portion; And a welded portion welded to the outer circumferential surface of the head portion so as to surround the drill bit. In the Rockwell Hardness (HRC), the weld portion is larger than the head portion and smaller than the drill bit.

Here, the mining block is made of a tungsten carbide material, and the shank portion, the support portion, and the head portion are integrally formed of an alloy material of chromium and molybdenum, and are subjected to a heat treatment such that the Rockwell hardness (HRC) do.

Here, the welded portion is composed of a welding electrode containing 12 wt% to 15 wt% of chromium, 0.85 wt% to 0.92 wt% of nickel, and 1 wt% to 1.1 wt% of molybdenum with respect to a total of 100 wt% To the head portion.

Here, the welded portion is formed in a ring shape on the outer peripheral surface of the head portion.

Here, the welded portion includes a cemented carbide portion mixed by carbide firing.

According to the bit for digging according to the present invention, it is possible to prevent abrasion between the head part and the mining bit, to protect the head part by increasing the surface hardness of the head part around the mining bit, Can be suppressed or prevented.

Further, the present invention can prevent the head portion from being broken at the periphery of the mining block, and can prevent or prevent the mining block from being separated from the head portion.

In addition, the present invention improves the strength and hardness of the head portion, improves the joining force of the mining tools at the head portion, and prevents the fixing grooves from spreading.

In addition, the present invention improves corrosion resistance, heat resistance, and wear resistance at the head portion, and maintains durability of the head portion at the abrasion between metals.

In addition, the present invention makes it possible to stably bring up the welding in the head portion, to further improve the bonding force between the head portion and the mining bite, and to eliminate the gap between the head portion and the mining bite in the fixing groove.

Further, the present invention can protect the head portion through reinforcement between the welded portions and prevent deformation or breakage of the head portion between the welded portions.

Further, the present invention can improve the strength and hardness of the head portion, increase the roughness of the welded portion, and prolong the life of the bit for digging.

1 is a side view showing a bit for digging according to an embodiment of the present invention.
2 is a partially enlarged cross-sectional view showing a bit for digging according to an embodiment of the present invention.
FIG. 3 is a perspective view showing a mining bit manufactured according to an embodiment of the present invention. FIG.

Hereinafter, an embodiment of a digging bit according to the present invention will be described with reference to the accompanying drawings. Here, the present invention is not limited or limited by the examples. In describing the present invention, a detailed description of known functions or configurations may be omitted to clarify the gist of the present invention.

FIG. 1 is a side view showing a bit for digging according to an embodiment of the present invention, FIG. 2 is a partially enlarged cross-sectional view showing a bit for digging according to an embodiment of the present invention, and FIG. Is a perspective view showing a mining bit manufactured according to an example.

1 to 3, a digging bit according to an embodiment of the present invention includes a shank portion 30, a support portion 20, a head portion 10, a digging tool 60, a welding portion 40).

At this time, in the Rockwell hardness (HRC), the welding portion 40 is larger than the head portion 10 and smaller than the drilling bit 60, so that the distance between the head portion 10 and the drilling bit 60 And the head portion 10 is protected by increasing the surface hardness of the head portion 10 in the periphery of the digging tool 60. A crack is generated in the head portion 10, It is possible to suppress or prevent the occurrence of a gap in the fixing groove 11 which is formed by the above-described method.

Here, when the Rockwell hardness (HRC) becomes large, the depth of the groove becomes small, and the measured object becomes hard. When the Rockwell hardness (HRC) becomes small, the depth of the groove becomes large.

The shank portion 30 is coupled to a mining tool for mining. The mining tool according to one embodiment of the present invention and the mining bit according to one embodiment of the present invention can be used for mining coal. The shank portion 30 may be fitted into a shank insertion hole (not shown) provided in the mining tool.

Since the shank portion 30 is provided with the fastening finishing portion 31, a separate fastening member (not shown) is detachably coupled to the fastening finishing portion 31, So that the mining bits can be replaced.

The support portion 20 extends from the shank portion 30 with a larger diameter than the shank portion 30. The support portion 20 indicates the insertion limit of the shank portion 30 when the shank portion 30 is fitted into the shank insertion hole (not shown). When the shank portion 30 is inserted into the shank portion 30, So that the fastening finishing portion 31 and the separate fastening member (not shown) are stably engaged.

The head portion 10 extends from the support portion 20 with a diameter equal to or smaller than the support portion 20. The head portion 10 includes a portion extending from the support portion 20 so as to gradually decrease in diameter. At this time, a fixing groove 11 is formed at the end of the head part 10. The digging tool (60) is coupled to the fixing groove (11).

The digging tool (60) is brazed to the fixing groove (11). Accordingly, the mining buckets 60 can be stably fixed to the head portion 10. At this time, the end of the mining block 60 protrudes from the head portion 10 and is directly involved in operations such as excavation and excavation. The end portion of the digging tool 60 protruding from the head portion 10 may be gradually reduced in diameter to form a tip portion.

Here, the mining buckets 60 are made of tungsten carbide material to suppress magnetic abrasion, and facilitate work such as excavation and mining. The shank portion 30, the support portion 20, and the head portion 10 are integrally connected to each other.

The shank portion 30, the support portion 20 and the head portion 10 are made of an alloy material of chrome and molybdenum and are thermally treated so that the hardness of HRC is in the range of 42 to 45.

At this time, when the Rockwell hardness (HRC) is smaller than 42, the head portion 10 is retreated, and therefore, the head portion 10 is moved to the above- A clearance is formed in the fixing groove 11 so that the mining buckets 60 can be separated from the head portion 10.

When the Rockwell hardness (HRC) is greater than 45, the head portion 10 is hardened. Therefore, the head portion 10 is prevented from cracking due to impact applied to the mining bucket 60 in operations such as mining, excavation, May be generated or destroyed. When the hardness of the head portion 10 is greater than 45, the hardness of the head portion 10 can be lowered when the weld portion 40 is formed on the head portion 10.

Accordingly, the hardness of the head portion 10 can be stabilized by maintaining the Rockwell hardness (HRC) of 42 to 45, and the binding force of the mining buckets 60 can be stabilized in the head portion 10 .

The welded portion 40 is welded to the outer peripheral surface of the head portion 10 so as to surround the digging tool 60. The welding part 40 prevents abrasion between the head part 10 and the mining tool 60 in accordance with an operation such as mining or excavation of the mining tool 60, It is possible to increase the surface hardness to protect the head portion 10 and suppress or prevent a crack from occurring in the head portion 10 or a gap from occurring in the fixing groove 11. [

At this time, the welded portion 40 may be formed to contain about 12 wt% to 15 wt% of chromium, 0.85 wt% to 0.92 wt% of nickel, and 1 wt% to 1.1 wt% of molybdenum in a total of 100 wt% Welded to the head portion 10 with a welding electrode. More specifically, the weld 40 comprises 0.88 wt% to 0.90 wt% nickel and 1.04 wt% to 1.07 wt% molybdenum with 13 wt% to 14 wt% chromium for a total of 100 wt% Welded to the head portion 10 with a welding rod containing the welding wire.

For example, the welding portion 40 is welded to the head portion 10 with a welding rod containing 13 wt% of chromium and 0.89 wt% of nickel and 1.05 wt% of molybdenum with respect to the entire 100 wt% of the welding rod .

The surface hardness of the head portion 10 is not satisfied or the characteristics (corrosion resistance, heat resistance, abrasion resistance, etc.) of the welded portion 40 are difficult to be exhibited when the weight ratio of the substance contained in the electrode exceeds the allowable range .

However, in the present invention, the surface hardness of the head portion 10 can be sufficiently stabilized by limiting the weight ratio of the substances contained in the electrode to the allowable range, and the characteristics (corrosion resistance, heat resistance, Etc.) can be stably satisfied.

The welding portion 40 may be formed on the outer circumferential surface of the head portion 10 in a ring shape. It is advantageous that the welding portion 40 is welded to the outer circumferential surface of the head portion 10 in such a manner that two or more ring shapes are superposed on each other. The joining force of the mining buckets 60 can be increased by the shape of the welded portion 40.

Particularly, in the welding portion 40, the hardness and hardness of the head portion 10 are improved by including the cemented carbide portion 50 mixed by the hardening of the carbide, the roughness of the welding portion 40 is increased, It is possible to extend the service life of the digging bit according to one embodiment of the present invention.

According to the above-described mining bit, the surface hardness of the head portion 10 is increased in the vicinity of the mining tool 60 to protect the head portion 10, and a crack is generated in the head portion 10 It is possible to suppress or prevent the occurrence of a gap in the fixing groove 11. [

It is also possible to prevent the head portion 10 from being broken at the periphery of the mining block 60 and to prevent or prevent the mining block 60 from being separated from the head portion 10.

In addition, it is possible to improve the strength and hardness of the head portion 10, to improve the engaging force of the digging tool 60 in the head portion, and to prevent the fixing groove 11 from being opened. In addition, the head portion 10 can improve corrosion resistance, heat resistance, and wear resistance, and can maintain excellent durability of the head portion 10 due to abrasion between metals.

It is also possible to stably weld the head portion 10 and improve the bonding force between the head portion 10 and the digging tool 60 and to secure the head portion 10 ) And the mining block 60 can be eliminated.

It is also possible to protect the head portion 10 through reinforcement between the welded portions 40 and to prevent deformation or breakage of the head portion 10 between the welded portions 40. In addition, it is possible to improve the strength and hardness of the head portion 10, to increase the roughness of the welded portion 40, and to extend the service life of the bit for drilling according to an embodiment of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. Modify or modify the Software.

10: head part 11: fixing groove 20: support part
30: shank portion 31: fastening finishing portion 40: welded portion
50: cemented carbide portion 60: mined bite

Claims (5)

A shank portion coupled to a mining tool for mining;
A support extending from the shank at a larger diameter than the shank;
A head portion extending from the support portion at a diameter equal to or smaller than the support portion and having a fixing groove recessed at an end thereof;
A mining bite coupled to the fixing groove such that the end portion protrudes from the head portion; And
And a welded portion welded to the outer circumferential surface of the head portion so as to surround the mining tool,
The digging bite is brazed to the fixing groove,
For Rockwell hardness (HRC)
Wherein the welding portion is larger than the head portion, smaller than the mining bite,
The welding portion may be formed by welding two or more ring shapes in an overlapping manner on an outer circumferential surface of the head portion where the fixing groove is formed so that a gap is not formed between the fixing groove and the mining bite due to the expansion of the fixing groove being prevented Features a mining bit. The method according to claim 1,
The mining byte,
Tungsten carbide material,
The shank portion, the support portion, and the head portion,
Characterized in that it is heat treated so as to have an integral form of an alloy material of chromium and molybdenum and have a Rockwell hardness (HRC) of 42 to 45. 3. The method of claim 2,
The welding portion
A welding electrode containing 12 wt% to 15 wt% of chromium and 0.85 wt% to 0. 92 wt% of nickel and 1 wt% to 1.1 wt% of molybdenum based on 100 wt% A digging bit characterized by welding. delete 4. The method according to any one of claims 1 to 3,
Wherein the welded portion includes a cemented carbide portion mixed by carbide firing.
KR2020160001509U 2016-03-21 2016-03-21 Mining bit KR200484982Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020160001509U KR200484982Y1 (en) 2016-03-21 2016-03-21 Mining bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020160001509U KR200484982Y1 (en) 2016-03-21 2016-03-21 Mining bit

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Publication Number Publication Date
KR20170003387U KR20170003387U (en) 2017-10-10
KR200484982Y1 true KR200484982Y1 (en) 2017-11-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102713166B1 (en) 2023-11-03 2024-10-07 한국건설기술연구원 Method for manufacturing of pick cutter for excavation and pick cutter manufactured by the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000271785A (en) * 1999-03-25 2000-10-03 Okano Valve Mfg Co WELDING MATERIAL FOR HIGH Cr FERRITIC BASE HEAT RESISTANT STEEL, TIG WELDING ROD COMPOSED OF THIS MATERIAL, SUBMERGED ARC WELDING ROD, WIRE FOR WELDING AND COATED ARC WELDING ROD
JP2010001661A (en) * 2008-06-20 2010-01-07 Michio Arai Bit holder, cutting blade, and auger head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5415462A (en) 1994-04-14 1995-05-16 Kennametal Inc. Rotatable cutting bit and bit holder
JPH10220154A (en) * 1997-02-06 1998-08-18 Tokiwa Sangyo Kk Excavation bit
JP3055094B2 (en) * 1997-02-25 2000-06-19 北海道 Bit and method for manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000271785A (en) * 1999-03-25 2000-10-03 Okano Valve Mfg Co WELDING MATERIAL FOR HIGH Cr FERRITIC BASE HEAT RESISTANT STEEL, TIG WELDING ROD COMPOSED OF THIS MATERIAL, SUBMERGED ARC WELDING ROD, WIRE FOR WELDING AND COATED ARC WELDING ROD
JP2010001661A (en) * 2008-06-20 2010-01-07 Michio Arai Bit holder, cutting blade, and auger head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102713166B1 (en) 2023-11-03 2024-10-07 한국건설기술연구원 Method for manufacturing of pick cutter for excavation and pick cutter manufactured by the same

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