KR102230524B1 - Core drill with diamond segment - Google Patents

Core drill with diamond segment Download PDF

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Publication number
KR102230524B1
KR102230524B1 KR1020190143859A KR20190143859A KR102230524B1 KR 102230524 B1 KR102230524 B1 KR 102230524B1 KR 1020190143859 A KR1020190143859 A KR 1020190143859A KR 20190143859 A KR20190143859 A KR 20190143859A KR 102230524 B1 KR102230524 B1 KR 102230524B1
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South Korea
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circumferential surface
shank
drill
tip
unit
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KR1020190143859A
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Korean (ko)
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김대욱
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동신다이아몬드공업 주식회사
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The present invention relates to a core drill with a diamond segment, which is able to improve cutting properties, to discharge a cut subject well, to promote safety in a punching process, and to easily discharge drill punching central residue. According to the present invention, the core drill comprises: a circular drill shank (10) having a shank inner circumferential surface (12a) and a shank outer circumferential surface (12b) on the inner side and the outer side of the inner hole (12) formed on a lower side of a core attachment/detachment unit (11); and a tip unit (21) fixed on a bottom surface unit (13) of the drill shank (10). On an upper side of the tip unit (21) formed is a mounting unit (22) as one body to be inserted into a mounting groove unit (14) formed on a lower side of the drill shank (10) to be bonded by a silver soldering. Also included are a large number of segments (20) fixed at regular intervals in a circumferential direction of the drill shank (10). The tip unit (21) has a tip unit inner circumferential surface (21b) matching the shank inner circumferential surface (12a) on the same straight line. A tip unit outer circumferential surface (21a) is protruding more than the shank outer circumferential surface (12b). Thereby formed are the outer extended drop bump unit (23) which matches the tip unit outer circumferential surface (21a) on the same straight line. The mounting unit (22) has a mounting unit outer circumferential surface (22b) matching the shank outer circumferential surface (12b) on the same straight line. A mounting unit inner circumferential surface (22a) has a second cutting bump blade unit (24) by protruding more than the tip unit inner circumferential surface (21b) and the shank inner circumferential surface (12a).

Description

드릴천공 중앙잔재물 배출이 용이한 다이아몬드세그먼트를 구비하는 코어드릴{Core drill with diamond segment}Core drill with diamond segment for easy discharge of central residues from drill drilling {Core drill with diamond segment}

본 발명은 주로 석재나 콘크리트 구조물을 천공하는데 사용되는 코어드릴에 관한 것으로서, 더욱 상세하게는 절삭성이 향상되고 피삭재 배출이 양호하고 천공작업의 안전성이 도모될 수 있도록 개선된 드릴천공 중앙잔재물 배출이 용이한 다이아몬드세그먼트를 구비하는 코어드릴에 관한 것이다.The present invention relates to a core drill mainly used for drilling stone or concrete structures, and in more detail, improved machinability, good discharge of workpieces, and improved drilling of central residues to facilitate the safety of drilling work is easy. It relates to a core drill having one diamond segment.

일반적으로 코어드릴은 천공작업시에 코어드릴 내부로 절삭된 피삭재가 인입되게 되는데 이와 같이 코어드릴 내부로 들어간 피삭제를 빼내려면 전동기계를 완전히 멈춘상태에서 안에 남아있는 물체를 기계에서 드릴나사를 돌려서 뺀후에 코어드릴의 중앙 나사구멍에 들어갈만한 긴 쇠막대을 넣어서 망치로 쳐내야만이 빠지는 문제로 인해서 연속작업을 할수 없어 연속작업이 불가능한 문제점이 있다.In general, in core drills, the workpiece cut into the core drill is introduced into the core drill during drilling.To remove the workpiece that has entered the core drill as described above, turn the drill screw to remove the object remaining inside the machine while the electric machine is completely stopped. There is a problem in that continuous work is impossible because continuous work cannot be performed due to the problem that only a long iron rod enough to fit into the central screw hole of the core drill is inserted and hammered out after removal.

또한, 코어드릴을 수직천공작업만 하는게 아니라 비틀면서 천공을 하다보면 세그먼트팁이 다 쓰기도 전에 샹크바디에서 탈락되어 얼마 사용하지 않아서 버려야 하는 문제점이 있다. In addition, if the core drill is not only vertically drilled, but is twisted and drilled, there is a problem that the segment tip is removed from the shank body before it is used up, so that it is not used for a long time.

따라서, 선행기술의 특허문헌으로 기재된 바와 같은 코어드릴이 선행기술로 개시되고 있으나, 피삭재와 접촉되는 세그먼트 면적이 넓기 때문에 고가에 해당되는 세그먼트의 재료가 많이 소요되는 문제점을 수반할 뿐만 아니라 세그먼트와 피삭재간에 접촉면적이 많기 때문에 절삭저항이 커지게 되고 절삭효율이 저하되는 문제점이 있다.Therefore, the core drill as described in the patent document of the prior art has been disclosed as a prior art, but the segment area in contact with the workpiece is large, so not only does it involve the problem of requiring a lot of material for the segment, which is expensive, but also the segment and the workpiece. Since the contact area between them is large, there is a problem that cutting resistance increases and cutting efficiency decreases.

그리고 상기 선행기술은 드릴샹크(드릴몸체) 하단부에 세그먼트가 접합된 것이므로 절삭과정에 발생되는 마찰열에 의해서 접합력 저하 또는 피로한도가 커지게 되어서 세그먼트가 드릴몸체로부터 떨어져 나가서 고가의 코어드릴이 파손되는 문제점과 작업 위험성이 야기되는 등의 문제점이 있는 것이다.In the prior art, since the segment is bonded to the lower end of the drill shank (drill body), the bonding force decreases or the fatigue limit increases due to frictional heat generated during the cutting process, so that the segment is separated from the drill body and the expensive core drill is damaged. There is a problem such as causing the danger of overwork.

KR 20-1996-0006713 Y1 1996.08.05KR 20-1996-0006713 Y1 1996.08.05

본 발명은 절삭성이 향상되고 피삭재 배출이 양호하고 천공작업의 안전성이 도모될 수 있도록 개선된 드릴천공 중앙잔재물 배출이 용이한 다이아몬드세그먼트를 구비하는 코어드릴을 제공하려는데 그 목적이 있는 것이다.An object of the present invention is to provide a core drill having a diamond segment with improved machinability, good discharge of workpieces, and easy discharge of drilled central residues so that the safety of drilling work can be improved.

본 발명의 다른 목적은 세그먼트의 원가절감이 도모되면서도 제품 신뢰성이 향상되도록 함으로써 양질의 코어드릴을 보다 저렴하게 보급 가능하도록 하려는데 있다.Another object of the present invention is to reduce the cost of segments and improve product reliability, thereby making it possible to supply high-quality core drills at a lower cost.

본 발명은, 코어탈착부 하부에 있는 내부공의 내외측으로 샹크내주면과 샹크외주면을 갖는 원형의 드릴샹크와, 상기 드릴샹크의 저면부에 고정되는 팁부를 구비하고, 상기 팁부 상부에는 드릴샹크 하부에 있는 장착홈부에 삽입되어 은납땜으로 접합되게 고정되는 장착부를 구비하여 드릴샹크의 원주면방향으로 다수가 등간격으로 고정되는 세그먼트를 포함하고, 상기 팁부는 팁부내주면과 샹크내주면이 일직선상으로 일치하고 팁부외주면이 샹크외주면보다 더 돌출되게 구성하여 형성된 상부에 있는 외측확장단차턱부와 팁부외주면이 일직선상으로 형성되도록 구성되고, 상기 장착부는 장착부외주면이 샹크외주면과 일직선상으로 일치하고 장착부내주면은 팁부내주면 및 샹크내주면보다 돌출되게 하여 2차절삭턱날부를 갖도록 구성되게 이루어지는 것을 그 특징으로 한다.The present invention includes a circular drill shank having an inner circumferential surface of the shank and an outer circumferential surface of the shank to the inner and outer sides of the inner hole under the core detachment unit, and a tip portion fixed to the bottom surface of the drill shank, and at the top of the tip portion, under the drill shank Includes a segment that is inserted into the mounting groove and is fixed to be joined by silver soldering, and a plurality of segments are fixed at equal intervals in the direction of the circumferential surface of the drill shank, and the tip part is aligned with the inner circumferential surface of the tip and the inner circumferential surface of the shank in a straight line. The outer circumferential surface of the tip part is configured to protrude more than the outer circumferential surface of the shank, and the outer extended stepped jaw part and the outer circumferential surface of the tip part are formed in a straight line. It is characterized in that it is configured to have a secondary cutting jaw blade by protruding from the inner peripheral surface of the tip portion and the inner peripheral surface of the shank.

상기 외측확장단차턱부와 2차절삭턱날부가 드릴샹크의 저면부 선상에 위치하여 구비되도록 구성되는 것을 다른 특징으로 한다.Another feature is that the outer extension stepped jaw portion and the secondary cutting jaw blade portion are configured to be positioned on a line of the bottom of the drill shank.

상기 장착홈부는 하부개방공 상부에 원주방향으로 기다란 가로형장공을 구비하여 하부개방공 양측에 걸림턱부를 각각 구비하고, 장착부는 하부개방공에 삽입되는 목부 상부에 가로형장공으로 삽입되는 가로형걸림부를 구비하고 목부 양측으로는 걸림턱부가 삽입되는 걸림홈부를 구비하여 장착홈부에 장착부가 결합되도록 구성되게 이루어지는 것을 또 다른 특징으로 한다.The mounting groove has an elongated horizontal long hole in the circumferential direction in the upper portion of the lower opening hole, and has locking jaws on both sides of the lower opening hole, and the mounting portion has a horizontal locking portion inserted into a horizontal long hole above the neck portion inserted into the lower opening hole. And the neck is provided with a locking groove in which the locking jaw portion is inserted on both sides of the neck, and it is another feature that the mounting portion is configured to be coupled to the mounting groove.

본 발명은 코어드릴의 드릴샹크가 피삭물에 끼임이 되지 않게 방지되는 상태가 되므로 절삭성이 양호하고 우수한 절삭성을 제공하게 되는 효과가 있다.The present invention has the effect of providing good machinability and excellent machinability since the drill shank of the core drill is prevented from being pinched to the workpiece.

또한, 본 발명은 천공작업시에 피삭물이 드릴샹크에 끼지 않게 되고 나중에 피삭물를 제거할 때 드릴샹크의 내부공에서 잘 빠지게 되어서 피삭물 배출이 용이하여서 작업 능률이 크게 향상되는 효과가 있다.In addition, in the present invention, the workpiece is not caught in the drill shank during the drilling operation, and when the workpiece is removed later, it is easily removed from the inner hole of the drill shank, so that the workpiece is easily discharged, thereby greatly improving work efficiency.

그리고 본 발명은 장착부가 드릴샹크에 접합되는 은납땜 접합면적이 예전보다는 크게 배가되어 접합된 상태가 되어서 접합 강도가 커지게 되는 것일 뿐만 아니라 세그먼트의 가로형걸림부가 걸림턱부에 걸림된 상태이기 때문에 드릴샹크로부터 세그먼트가 탈락되지 않게 되는 효과를 제공하게 되고 그로 인해 천공작업시에 안전성이 도모되는 효과를 제공하게 되는 것이다. In addition, in the present invention, the silver solder joint area of the mounting part to be joined to the drill shank is doubled than before, and the joint strength is increased as well as the horizontal engaging part of the segment is in a state that the hooking jaw part is stuck to the drill shank. It provides an effect of preventing the segment from falling off from and thereby providing an effect of promoting safety during the drilling operation.

도 1은 본 발명이 실시된 코어드릴의 분리 사시도,
도 2는 본 발명에 따른 세그먼트의 저면을 나타낸 사시도,
도 3은 본 발명의 코어드릴의 전체 사시도,
도 4는 본 발명의 코어드릴의 전체 단면 구성도,
도 5는 본 발명의 외측확장단차턱부를 나타낸 사시도,
도 6은 본 발명의 작용을 설명하는 개략 구성도이다.
1 is an exploded perspective view of a core drill in which the present invention is implemented,
2 is a perspective view showing the bottom of the segment according to the present invention,
3 is an overall perspective view of the core drill of the present invention,
Figure 4 is an overall cross-sectional configuration diagram of the core drill of the present invention,
Figure 5 is a perspective view showing the outer extension stepped jaw of the present invention,
6 is a schematic configuration diagram for explaining the operation of the present invention.

본 발명을 첨부된 바람직한 실시 도면에 의거하여 보더 상세히 설명하면 다음과 같다.The present invention will be described in more detail with reference to the accompanying preferred embodiments as follows.

도 1 내지 도 4를 참조하면, 본 발명은 코어탈착부(11) 하부에 있는 내부공(12)의 내외측으로 샹크내주면(12a)과 샹크외주면(12b)을 갖는 원형의 드릴샹크(10)를 구비한다.1 to 4, the present invention provides a circular drill shank 10 having a shank inner circumferential surface 12a and a shank outer circumferential surface 12b in the inner and outer sides of the inner hole 12 under the core detachable part 11 Equipped.

또한, 드릴샹크(10)의 저면부(13)에 고정되는 팁부(21)를 구비하고, 상기 팁부(21) 상부에는 드릴샹크(10) 하부에 있는 장착홈부(14)에 삽입되어 은납땜으로 접합되게 고정되는 장착부(22)를 구비하여 드릴샹크(10)의 원주면방향으로 다수가 등간격으로 고정되는 세그먼트(20)를 구비한다.In addition, a tip portion 21 fixed to the bottom portion 13 of the drill shank 10 is provided, and the tip portion 21 is inserted into the mounting groove 14 under the drill shank 10 by silver soldering. A plurality of segments 20 are provided at equal intervals in the direction of the circumferential surface of the drill shank 10 by having a mounting portion 22 that is fixed to be joined.

따라서, 본 발명의 세그먼트(20)의 팁부(21)는, 도 4 및 도 5에 나타낸 바와 같이 팁부내주면(21b)과 샹크내주면(12a)이 일직선상으로 일치하고 팁부외주면(21a)이 샹크외주면(12b)보다 더 돌출되게 구성하여 팁부(21) 상부에 외측확장단차턱부(23)를 갖도록 구성된다.Therefore, the tip portion 21 of the segment 20 of the present invention, as shown in Figs. 4 and 5, the tip inner circumferential surface 21b and the shank inner circumferential surface 12a are aligned in a straight line, and the tip outer circumferential surface 21a is It is configured to protrude more than the outer circumferential surface of the shank 12b to have an outer extended stepped portion 23 on the tip portion 21.

즉, 팁부외주면(21a)이 샹크외주면(12b)보다 더 돌출되게 구성하여 형성된 상부에 있는 외측확장단차턱부(23)와 팁부외주면(21a)이 일직선상으로 형성되도록 구성되는 것이다.That is, the outer circumferential surface of the tip portion (21a) is configured to protrude more than the outer circumferential surface of the shank (12b), and the outer extended stepped portion 23 and the outer circumferential surface of the tip portion (21a) in the upper portion formed in a straight line is configured to be formed.

그리고 세그먼트(20)의 장착부(22)는, 도 2 및 도 4에 나타낸 바와 같이 장착부외주면(22b)이 샹크외주면(12b)과 일직선상으로 일치하고 장착부내주면(22a)은 팁부내주면(21b) 및 샹크내주면(12a)보다 돌출되게 하여 2차절삭턱날부(24)를 갖도록 구성되게 이루어져 있다.And the mounting portion 22 of the segment 20, as shown in Figs. 2 and 4, the mounting part outer circumferential surface 22b coincides with the shank outer circumferential surface 12b in a straight line, and the mounting part inner circumferential surface 22a is the tip inner circumferential surface 21b And it is configured to protrude from the inner peripheral surface (12a) of the shank to have a secondary cutting jaw blade portion (24).

즉 본 발명은 세그먼트(20)가 팁부외주면(21a)이 샹크외주면(12b)보다 더 돌출되게 구성하여 형성된 상부에 있는 외측확장단차턱부(23)와 팁부외주면(21a)이 일직선상으로 형성되는 팁부(21) 및 장착부내주면(22a)에서 돌출되게 형성되는 여 2차절삭턱날부(24)를 상하방향으로 각각 구비하므로 2중 절삭부를 갖는 세그먼트(20)를 구성하게 되는 것이다.In other words, in the present invention, the outer extension stepped portion 23 and the tip outer peripheral surface 21a at the top formed by configuring the segment 20 to protrude more than the outer peripheral surface 21a of the shank are formed in a straight line. Since the secondary cutting blade portion 24 formed to protrude from the tip portion 21 and the mounting portion inner peripheral surface 22a are respectively provided in the vertical direction, a segment 20 having a double cutting portion is constituted.

그리고 드릴샹크(10)의 장착홈부(14)는, 하부개방공(141) 상부에 원주방향으로 기다란 가로형장공(142)을 구비하여 하부개방공(141) 양측에 걸림턱부(143)를 구비하도록 구성된다.And the mounting groove 14 of the drill shank 10 is provided with an elongated horizontal long hole 142 in the circumferential direction above the lower opening hole 141 so as to have locking projections 143 on both sides of the lower opening hole 141 It is composed.

그리고 세그먼트(20)의 하부개방공(141)에 삽입되는 목부(221) 상부에 가로형장공(142)으로 삽입되는 가로형걸림부(222)를 구비하고 목부(221) 양측으로는 걸림턱부(143)가 삽입되는 걸림홈부(223)를 구비하여 장착홈부(14)에 장착부(22)가 결합되도록 구성되게 이루어져 있고, 이들은 은납땜되어 고정되는 것으로서, 이와 같이 은납땜으로 고정하는 것은 이미 알려진 것이므로 상세한 도면 도시와 설명은 생략하는 것으로 한다. And the neck portion 221 inserted into the lower opening hole 141 of the segment 20 is provided with a horizontal engaging portion 222 inserted into the horizontal long hole 142, and the neck portion 221 is provided with a locking jaw portion 143 on both sides. The mounting portion 22 is configured to be coupled to the mounting groove 14 by having a locking groove 223 into which the is inserted, and these are fixed by silver soldering, and it is already known that the fixing by silver soldering is known, so detailed drawings The illustration and description are omitted.

따라서, 드릴샹크(10)와 세그먼트(20)가 은납땜으로 고정되면 외측확장단차턱부(23)와 2차절삭턱날부(24)가 드릴샹크(10)의 저면부(13) 선상에 위치하여 구비되는 상태가 된다.Therefore, when the drill shank 10 and the segment 20 are fixed by silver soldering, the outer extension stepped portion 23 and the secondary cutting jaw blade portion 24 are located on the line of the bottom portion 13 of the drill shank 10. It is in a state of being equipped.

따라서, 석재나 콘크리트구조물에 대한 천공작업을 실시하게 되면 코어드릴이 회전하면서 세그먼트(20)의 팁부(21)의 저면과 피삭재가 마찰접촉되면서 천공작업이 이루어지게 된다.Accordingly, when the drilling work is performed on a stone or concrete structure, the core drill rotates and the bottom surface of the tip portion 21 of the segment 20 and the workpiece are in frictional contact, thereby performing the drilling operation.

이때, 팁부(21)가 팁부내주면(21b)과 샹크내주면(12a)이 일직선상으로 일치하고 팁부외주면(21a)이 샹크외주면(12b)보다 더 돌출되게 구성하여 팁부(21) 상부에 외측확장단차턱부(23)를 갖도록 구성됨에 따라 피삭재에 천공되는 구멍의 직경이 드릴샹크(10)의 직경보다는 더 큰 직경으로 천공되는 상태가 되고, 그로 인해 천공작업시에 코어드릴의 드릴샹크(10)가 피삭물에 끼임이 되지 않게 방지되는 상태가 되어서 절삭성이 양호하게 되는 것이다.At this time, the tip part 21 is configured such that the tip part inner circumferential surface 21b and the shank inner circumferential surface 12a are aligned in a straight line, and the tip outer circumferential surface 21a is configured to protrude more than the shank outer circumferential surface 12b. As it is configured to have the extended stepped portion 23, the diameter of the hole drilled in the workpiece becomes a state that is drilled to a larger diameter than the diameter of the drill shank 10, and thereby, the drill shank 10 of the core drill during the drilling operation. ) Is prevented from getting caught in the work piece, so that the machinability is good.

그리고 천공작업시에 절삭 가공되는 피삭물(P)은 도 6에 나타낸 바와 같이 내부공(12)에 삽입되는 상태가 된다. 이때 본 발명은 내부공(12)으로 점차 들어가게 되는 가공된 피삭물(P)이 2차절삭턱날부(24)에 의해 절삭됨으로써 내부공(12)의 직경보다 그 내부공(12)으로 들어가는 피삭물(P)의 직경이 더욱 작아지는 상태로 절삭되어 삽입되는 상태가 된다.In addition, the workpiece P to be cut during the drilling operation is inserted into the inner hole 12 as shown in FIG. 6. At this time, in the present invention, the processed workpiece (P) gradually entering the inner hole 12 is cut by the secondary cutting jaw blade portion 24, so that the blood entering the inner hole 12 is less than the diameter of the inner hole 12. It is in a state where the diameter of the workpiece P is further reduced and is cut and inserted.

그러므로 내부공(12)으로 들어가는 피삭물(P)이 드릴샹크(10)에 끼지 않게 되고 나중에 피삭물(P)를 제거할 때 드릴샹크(10)의 내부공(12)에서 잘 빠져서 용이하게 이탈되는 상태가 된다.Therefore, the workpiece (P) entering the inner hole (12) does not get caught in the drill shank (10), and when the workpiece (P) is removed later, it is easily removed from the inner hole (12) of the drill shank (10). It becomes a state of being.

한편, 천공작업시에 세그먼트(20)가 원주방향으로 회전됨으로써 세그먼트(20)에 상당한 부하가 발생되어서 드릴샹크(10)로부터 탈락되려는 부하를 받게 된다.On the other hand, when the segment 20 is rotated in the circumferential direction during the drilling operation, a considerable load is generated on the segment 20 to receive a load to be removed from the drill shank 10.

이때, 본 발명은 장착부(22)가 드릴샹크(10)에 은납땜으로 접합됨으로써 접합면적이 예전보다는 크게 배가되어 접합된 상태가 되어서 접합 강도가 커지게 되는 것일 뿐만 아니라 세그먼트(20)의 가로형걸림부(222)가 걸림턱부(143)에 걸림된 상태이기 때문에 드릴샹크(10)로부터 세그먼트(20)가 탈락되지 않게 되는 것이다.At this time, in the present invention, the mounting portion 22 is joined to the drill shank 10 by silver soldering, so that the joint area is doubled than before, and the joint strength is increased, as well as the horizontal jamming of the segment 20. Since the portion 222 is in a state in which the locking jaw portion 143 is engaged, the segment 20 is not removed from the drill shank 10.

본 발명은 도면으로 도시되고 설명된 것에 반드시 국한 되는 것은 아니고 본 발명이 속하는 기술분야의 통상의 지식을 가진 자에 의해서 여러가지 형태로 변형실시될 수도 있는 것이므로 청구범위를 크게 벗어나지 않는한 폭넓게 보호되어야 하는 것은 자명한 것이다.The present invention is not necessarily limited to those illustrated and described in the drawings, and may be modified in various forms by those of ordinary skill in the art to which the present invention pertains. Therefore, it should be widely protected unless significantly departing from the scope of the claims. It is self-evident.

10:드릴샹크 11:코어탈착부
12:내부공 12a:샹크내주면
12b:샹크외주면 13:저면부
14:장착홈부 145:하부개방공
142:가로형장공 143:걸림턱부
20:세그먼트 21:팁부
21a:팁부외주면 21b:팁부내주면
22:장착부 22a:장착부내주면
22b:장착부외주면 221:목부
222:가로형걸림부 223:걸림홈부
23:외측확장단차턱부 24:2차절삭턱날부
P:피삭물
10: Drill shank 11: Core detachable part
12: internal hole 12a: inner side of shank
12b: outer circumference of shank 13: bottom
14: mounting groove 145: lower open hole
142: horizontal long hole 143: jamming jaw
20: segment 21: tip
21a: outer peripheral surface of the tip portion 21b: inner peripheral surface of the tip portion
22: mounting portion 22a: mounting portion inner peripheral surface
22b: mounting portion outer peripheral surface 221: neck portion
222: horizontal engaging portion 223: engaging groove
23: lateral expansion stepped jaw portion 24: secondary cutting jaw blade portion
P: Workpiece

Claims (3)

코어탈착부(11) 하부에 있는 내부공(12)의 내외측으로 샹크내주면(12a)과 샹크외주면(12b)을 갖는 원형의 드릴샹크(10)와;
상기 드릴샹크(10)의 저면부(13)에 고정되는 팁부(21)를 구비하고, 상기 팁부(21) 상부에는 드릴샹크(10) 하부에 있는 장착홈부(14)에 삽입되어 은납땜으로 접합되게 고정되는 장착부(22)를 일체로 구비하여 드릴샹크(10)의 원주면방향으로 다수가 등간격으로 고정되는 세그먼트(20)를 포함하고;
상기 팁부(21)는 팁부내주면(21b)과 샹크내주면(12a)이 일직선상으로 일치하고 팁부외주면(21a)이 샹크외주면(12b)보다 더 돌출되게 구성하여 형성된 상부에 있는 외측확장단차턱부(23)와 팁부외주면(21a)이 일직선상으로 형성되도록 구성되고;
상기 장착부(22)는 장착부외주면(22b)이 샹크외주면(12b)과 일직선상으로 일치하고 장착부내주면(22a)은 팁부내주면(21b) 및 샹크내주면(12a)보다 돌출되게 하여 2차절삭턱날부(24)를 갖도록 구성되게 이루어지는 것을 특징으로 하는 드릴천공 중앙잔재물 배출이 용이한 다이아몬드세그먼트를 구비하는 코어드릴.
A circular drill shank 10 having a shank inner circumferential surface 12a and a shank outer circumferential surface 12b on the inner and outer sides of the inner hole 12 under the core detachable part 11;
A tip part 21 fixed to the bottom part 13 of the drill shank 10 is provided, and the tip part 21 is inserted into the mounting groove 14 under the drill shank 10 and joined by silver soldering. A plurality of segments 20 fixed at equal intervals in the direction of the circumferential surface of the drill shank 10 by integrally provided with the mounting portion 22 fixed to be fixed;
The tip part 21 is formed by configuring the tip inner circumferential surface 21b and the shank inner circumferential surface 12a to be aligned in a straight line, and the tip outer circumferential surface 21a to protrude more than the shank outer circumferential surface 12b. (23) and the tip portion outer peripheral surface (21a) is configured to be formed in a straight line;
In the mounting part 22, the mounting part outer circumferential surface 22b is aligned with the shank outer circumferential surface 12b in a straight line, and the mounting part inner circumferential surface 22a protrudes from the tip inner circumferential surface 21b and the shank inner circumferential surface 12a. (24) A core drill having a diamond segment that is easy to discharge the central residue of the drill drilling, characterized in that it is configured to have.
제 1 항에 있어서,
상기 외측확장단차턱부(23)와 2차절삭턱날부(24)가 드릴샹크(10)의 저면부(13) 선상에 위치하여 구비되도록 구성되는 것을 특징으로 하는 드릴천공 중앙잔재물 배출이 용이한 다이아몬드세그먼트를 구비하는 코어드릴.
The method of claim 1,
Diamond for easy discharge of central remnants of drill drilling, characterized in that the outer extension stepped jaw portion 23 and the secondary cutting jaw blade portion 24 are disposed on a line of the bottom portion 13 of the drill shank 10 Core drill with segments.
제 1 항에 있어서,
상기 장착홈부(14)는 하부개방공(141) 상부에 원주방향으로 기다란 가로형장공(142)을 구비하여 하부개방공(141) 양측에 걸림턱부(143)를 각각 구비하고,
장착부(22)는 하부개방공(141)에 삽입되는 목부(221) 상부에 가로형장공(142)으로 삽입되는 가로형걸림부(222)를 구비하고 목부(221) 양측으로는 걸림턱부(143)가 삽입되는 걸림홈부(223)를 구비하여 장착홈부(14)에 장착부(22)가 결합되도록 구성되게 이루어지는 것을 특징으로 하는 드릴천공 중앙잔재물 배출이 용이한 다이아몬드세그먼트를 구비하는 코어드릴.
The method of claim 1,
The mounting groove 14 is provided with an elongated horizontal long hole 142 in the circumferential direction above the lower opening hole 141 and has locking projections 143 on both sides of the lower opening hole 141, respectively,
The mounting portion 22 includes a horizontal engaging portion 222 inserted into the horizontal long hole 142 on the upper portion of the neck portion 221 inserted into the lower opening hole 141, and locking jaws 143 on both sides of the neck portion 221 Core drill provided with a diamond segment, characterized in that it is configured such that the mounting portion 22 is coupled to the mounting groove 14 by having a locking groove portion 223 inserted therein.
KR1020190143859A 2019-11-11 2019-11-11 Core drill with diamond segment KR102230524B1 (en)

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* Cited by examiner, † Cited by third party
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KR102461978B1 (en) * 2022-06-24 2022-11-01 김경철 Ring bit for a excavator

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KR20050034151A (en) * 2003-10-08 2005-04-14 이화다이아몬드공업 주식회사 Connector unit of improved structure for core drill and assembly including the same together with core drill
US20050279533A1 (en) * 2004-06-22 2005-12-22 Vincent Corica Apparatus and method for securing diamond segment to rotating tool
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WO2011037948A2 (en) * 2009-09-22 2011-03-31 Longyear Tm, Inc. Impregnated cutting elements with large abrasive cutting media and methods of making and using the same
WO2011081775A1 (en) * 2009-12-15 2011-07-07 Longyear Tm, Inc. Drill bits with axially-tapered waterways
KR20170117240A (en) * 2012-12-21 2017-10-20 힐티 악티엔게젤샤프트 Cutting portion for a drill bit

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Publication number Priority date Publication date Assignee Title
KR960006713U (en) 1994-08-20 1996-03-13 노오섭 Balancing plate / hydraulic harrow plate structure
KR20050034151A (en) * 2003-10-08 2005-04-14 이화다이아몬드공업 주식회사 Connector unit of improved structure for core drill and assembly including the same together with core drill
US20050279533A1 (en) * 2004-06-22 2005-12-22 Vincent Corica Apparatus and method for securing diamond segment to rotating tool
US20100200304A1 (en) * 2009-02-12 2010-08-12 Saint-Gobain Abrasives, Inc. Abrasive tip for abrasive tool and method for forming and replacing thereof
WO2011037948A2 (en) * 2009-09-22 2011-03-31 Longyear Tm, Inc. Impregnated cutting elements with large abrasive cutting media and methods of making and using the same
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KR102461978B1 (en) * 2022-06-24 2022-11-01 김경철 Ring bit for a excavator

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