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KR20020074778A - Insert drill - Google Patents

Insert drill Download PDF

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Publication number
KR20020074778A
KR20020074778A KR1020010014774A KR20010014774A KR20020074778A KR 20020074778 A KR20020074778 A KR 20020074778A KR 1020010014774 A KR1020010014774 A KR 1020010014774A KR 20010014774 A KR20010014774 A KR 20010014774A KR 20020074778 A KR20020074778 A KR 20020074778A
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KR
South Korea
Prior art keywords
drill
groove
drill blade
insert
fitting
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
KR1020010014774A
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Korean (ko)
Inventor
이정수
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이정수
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Priority to KR1020010014774A priority Critical patent/KR20020074778A/en
Publication of KR20020074778A publication Critical patent/KR20020074778A/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/40—Flutes, i.e. chip conveying grooves
    • B23B2251/408—Spiral grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

PURPOSE: An insert drill is provided to prevent a joint bolt from separating at a coupling hole by forcedly jointing a drill blade part into a bottom of the installing groove. CONSTITUTION: A main cutting blade(11) and a web cutting blade(12) are formed at an upper end portion of the drill blade part(10). An inserting part(13) is formed at a lower end portion of the drill blade part(10) in a predetermined length. The drill blade part(10) is inserted into a distal end portion(21) of an installing groove(22). An inserting groove(23) is formed in the installing groove(22). The inserting part(13) of the drill blade part(10) is inserted into the inserting groove(23). A connecting hole(24) for connecting the joint bolt(25) is eccentrically formed at a side portion of the distal end portion(21) corresponding to the inserting groove(23). A spiral flute(26) is formed at a circumference of a drill body(20) in a determined depth. A taper groove(14) is formed at one side of the inserting part(13) of the drill blade part(10).

Description

인서트 드릴{Insert drill}Insert drill

본 발명은 인서트 드릴에 관한 것으로서, 더욱 상세하게는 드릴 작업시 그 진동에 의해 인서트 드릴의 선단부로부터 드릴날부가 분리되는 것을 방지하고, 특히 약 8㎜정도의 소직경 인서트 드릴에 효과적으로 적용될 수 있게 한 인서트 드릴에 관한 것이다.The present invention relates to an insert drill, and more particularly, to prevent the drill blade from being separated from the tip of the insert drill by vibrating the drill during drilling, and in particular, to effectively apply to a small diameter insert drill of about 8 mm. It relates to an insert drill.

주지된 바와 같이, 가공물의 구멍을 천공하는데 사용되는 드릴은 선단부와 드릴날부가 일체로 형성된 일체형 드릴과 선단부와 드릴날부가 분리가능한 인서트 드릴로 구분되어진다.As is well known, drills used to drill holes in workpieces are divided into integral drills in which the tip and the drill blades are integrally formed, and insert drills in which the tip and the drill blades are separable.

특히, 인서트 드릴은 본인이 이미 등록(대한민국 실용신안 등록번호 제 171644호)된 것이 있는바, 이에 대해서 좀 더 상세히 설명하면, 도 1과 같이 주절삭날(111)과 웨브절삭날(112)이 상단에 형성되고, 그 하단부에 소정길이의 끼움부 (113)가 형성되며, 상기 끼움부(113)에 다소 편심되게 고정홈(114)이 형성된 드릴날부(110)와; 선단부(121)에 드릴날부(110)가 삽입 고정되는 설치홈(122)이 형성되고, 상기 설치홈(122)에 드릴날부(110)의 끼움부(113)가 삽입되는 끼움공(123)이 형성되며, 상기 선단부(121)의 측부에 끼움공(123)과 다소 편심되게 조임볼트 (125)가 체결되는 체결공(124)이 관통되고, 그 외주연에 나선형상의 플루트가 소정깊이 형성된 드릴몸체(120); 등으로 된 것이다.In particular, the insert drill is already registered (the Republic of Korea Utility Model Registration No. 171644) that is already described in more detail, the main cutting edge 111 and the web cutting edge 112 as shown in FIG. A drill blade 110 formed at an upper end and having a fitting portion 113 having a predetermined length formed at a lower end thereof, and having a fixing groove 114 formed to be somewhat eccentric to the fitting portion 113; An installation groove 122 into which the drill blade 110 is inserted into and fixed to the tip portion 121 is formed, and a fitting hole 123 into which the fitting portion 113 of the drill blade 110 is inserted into the installation groove 122 is formed. Is formed, the drill hole 124 through which the fastening bolts 125 are fastened to the side of the tip portion 121 is fastened to the fitting hole 123 and somewhat eccentric, the drill body is formed in the outer periphery of the spiral flute of a predetermined depth 120; And so on.

그리고, 상기 드릴몸체(120)의 선단부(121)에 드릴날부(110)를 결합시키게 되면, 도 2와 같이 조임볼트(125)가 다소 편심되게 체결공(124)에 설치되므로 상기 조임볼트(125)가 드릴날부(110)를 시계방향인 m1 방향으로 밀어 드릴날부(110)의벽면이 설치홈(122)의 a와 b에 각각 밀착되며, 이는 반시계 방향으로 회전되는 인서트 드릴로 인하여 설치홈(122)의 a 및 b와 드릴날부(110)의 일면이 더욱 밀착되어 드릴날부(110)의 이탈방지는 물론 드릴날부(110)의 유동도 없어지게 된다.When the drill blade 110 is coupled to the front end portion 121 of the drill body 120, the tightening bolt 125 is installed in the fastening hole 124 to be somewhat eccentric as shown in FIG. ) Pushes the drill blade unit 110 in the clockwise direction m1 and the wall surfaces of the drill blade unit 110 are in close contact with a and b of the installation groove 122, respectively, which are installed by the insert drill rotated counterclockwise. A and b of the 122 and one surface of the drill blade portion 110 is in close contact with each other to prevent the separation of the drill blade portion 110, as well as the flow of the drill blade portion 110 is lost.

그러나, 상기와 같이 형성된 종래의 인서트 드릴은 선단부(121)의 양측에 체결공(124)이 경사지게 형성되어 있기 때문에 8㎜ 정도의 소직경 인서트 드릴에서는 사용이 불가능하다. 즉, 8㎜ 이하의 소직경 인서트 드릴에서는 나선형 플루트로 인하여 드릴몸체(120)에 두개의 체결공(124)을 형성하기가 불가능하기 때문이다.However, the conventional insert drill formed as described above cannot be used in the small diameter insert drill of about 8 mm because the fastening holes 124 are formed to be inclined at both sides of the tip portion 121. That is, in the small diameter insert drill of 8 mm or less, it is impossible to form two fastening holes 124 in the drill body 120 due to the spiral flute.

또한, 종래에는 드릴날부(110)의 고정홈(114)에 조임볼트(125)가 다소 여유있게 끼워지는 구조이기 때문에 상기 조임볼트(125)를 세게 조이더라도 작업시 발생되는 진동에 의해 드릴날부(110)가 상방으로 약간씩 유동됨은 물론이고 진동이 계속될 시에는 상기 고정홈(114)내의 조임볼트(125)가 체결공(124) 외측으로 빠지는 문제점이 있었다.Further, in the related art, since the tightening bolt 125 is inserted into the fixing groove 114 of the drill blade unit 110 in a somewhat relaxed manner, even when the tightening bolt 125 is firmly tightened, the drill blade part ( There is a problem that the fastening bolts 125 in the fixing grooves 114 fall out of the fastening holes 124 when the 110 flows slightly upward as well as the vibration continues.

따라서, 본 발명은 상기와 같은 문제점을 감안하여 발명한 것으로서 드릴날부의 끼움부 일측에 그 하단으로 갈수록 직경이 크지도록 테이퍼홈을 형성하여 조임볼트를 강하게 체결할수록 드릴날부가 선단부의 설치홈 저부로 강하게 조임결합되도록 하므로서 드릴날부의 유동을 방지하는 한편, 플루트를 벗어난 드릴몸체의 상단 일측에 조임볼트와 대응되는 체결공을 하나만 형성하므로서 8㎜ 이하의 소직경 드릴에서도 드릴날부의 착탈이 가능하게 함은 물론이고, 조임볼트의 단부를 뾰족하게 형성하여 조임볼트가 미세한 틈을 유지하고 있는 테이퍼홈과 설치홈의 끼움공 내주연 사이를 파고 들어가 문들어지게 하므로서 작업시 인서트 드릴에 강력한 진동이 발생하더라도 체결공으로부터 조임볼트가 빠지는 것을 방지할 수 있는 인서트 드릴을 제공함에 그 목적이 있다.Therefore, the present invention was invented in view of the above problems, and as the taper groove is formed to have a larger diameter at one end of the fitting portion of the drill blade toward the lower end thereof, the stronger the tightening bolt is, the lower the drill blade portion is at the bottom of the installation groove. It prevents the flow of the drill blade by being tightened tightly, while only one fastening hole corresponding to the tightening bolt is formed on one side of the drill body out of the flute, so that the drill blade can be attached or detached even in a small diameter drill of 8 mm or less. Of course, the end of the tightening bolts are sharply formed so that the tightening bolts can be penetrated between the tapered grooves that maintain the minute gap and the inner circumference of the fitting holes of the installation grooves, so that even if strong vibration occurs in the insert drill during operation. Provides insert drill to prevent tightening bolts from falling out of fasteners This is the purpose.

도 1은 종래 기술에 따른 인서트 드릴의 단면도,1 is a cross-sectional view of an insert drill according to the prior art,

도 2는 종래 기술에 따른 인서트 드릴의 평단면도,Figure 2 is a plan sectional view of the insert drill according to the prior art,

도 3은 본 발명에 따른 인서트 드릴의 요부 분해사시도,3 is an exploded perspective view of main parts of the insert drill according to the present invention;

도 4의 (a)는 본 발명에 따른 인서트 드릴의 평단면도,Figure 4 (a) is a cross-sectional plan view of the insert drill according to the present invention,

(b)는 본 발명에 따른 인서트 드릴의 요부 측단면도.(b) is a sectional side view of the main part of an insert drill according to the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10:드릴날부 11:주절삭날10: Drilling Blade 11: Main Cutting Edge

12:웨브절삭날 13:끼움부12: Web cutting edge 13: fitting part

14:테이퍼홈 20:드릴몸체14: tapered groove 20: drill body

21:선단부 22:설치홈21: tip 22: mounting groove

23:끼움공 24:체결공23: fitting ball 24: fastener

25:조임볼트 25:뾰족부25: Tightening bolt 25: Pointed

상기와 같은 목적을 달성하기 위한 본 발명은 드릴몸체와 드릴날부가 착탈되는 인서트 드릴에 있어서, 드릴날부의 끼움부 일측에 그 하단으로 갈수록 직경이 크지도록 테이퍼홈을 형성하고, 플루트를 벗어난 드릴몸체의 상단 일측에 조임볼트와 대응되는 체결공을 하나만 편심되게 형성하는 한편, 조임볼트의 단부를 테이퍼홈과 설치홈의 끼움공 내주연 사이를 파고 들어갈 수 있게 뾰족부를 형성한 것을 특징으로 한다.The present invention for achieving the above object in the insert drill detaching the drill body and the drill blade portion, forming a tapered groove so that the diameter toward the lower end of the drill portion of the fitting portion toward the lower end, the drill body off the flute While forming only one fastening hole corresponding to the tightening bolt on the upper side of the eccentric, the end of the tightening bolt is characterized in that the pointed portion is formed so as to dig between the tapered groove and the inner circumference of the fitting hole of the installation groove.

이하, 본 발명의 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 인서트 드릴의 요부 분해사시도이다.3 is an exploded perspective view showing main parts of the insert drill according to the present invention.

주절삭날(11)과 웨브절삭날(12)이 상단에 형성되고, 그 하단부에 소정길이의 끼움부(13)가 형성된 드릴날부(10)와; 선단부(21)에 드릴날부(10)가 삽입 고정되는 설치홈(22)이 형성되고, 상기 설치홈(22)에 드릴날부(10)의 끼움부(13)가 삽입되는끼움공(23)이 형성되며, 상기 선단부(21)의 측부에 끼움공(23)과 다소 편심되게 조임볼트(25)가 체결되는 체결공(24)이 관통되고, 그 외주연에 나선형상의 플루트 (26)가 소정깊이 형성된 드릴몸체(20); 등으로 된 인서트 드릴에 있어서,A drill blade portion 10 having a main cutting blade 11 and a web cutting blade 12 formed at an upper end thereof, and a fitting portion 13 having a predetermined length formed at a lower end thereof; An installation groove 22 in which the drill blade portion 10 is inserted and fixed is formed in the tip portion 21, and a fitting hole 23 into which the fitting portion 13 of the drill blade portion 10 is inserted into the installation groove 22 is provided. A fastening hole 24 through which the fastening bolts 25 are fastened to the side of the distal end portion 21 to be fitted with the fitting hole 23 is somewhat eccentric, and a spiral flute 26 is formed at a predetermined depth at an outer circumference thereof. A drill body 20 formed; In an insert drill with a back,

먼저, 상기 드릴날부(10)의 끼움부(13) 일측에 그 하단으로 갈수록 직경이 크지도록 테이퍼홈(14)을 형성한다.First, the tapered groove 14 is formed on one side of the fitting portion 13 of the drill blade 10 to have a larger diameter toward the lower end thereof.

그런 다음, 플루트(26)가 형성되지 않은 드릴몸체(20)의 상단 일측에 조임볼트(25)와 대응되는 체결공(24)을 하나만 편심되게 형성하는데, 상기 조임볼트(25)의 단부에 뾰족부(25a)를 형성하여 도 4와 같이 테이퍼홈(14)과 설치홈(22)의 끼움공(23) 내주연 사이를 파고 들어갈 수 있게 한다.Then, only one fastening hole 24 corresponding to the tightening bolts 25 is formed on one side of the upper end of the drill body 20 in which the flute 26 is not formed, which is pointed at the end of the tightening bolts 25. Forming a portion (25a) to allow the digging between the tapered groove 14 and the inner circumference of the fitting hole 23 of the installation groove 22 as shown in FIG.

상기와 같이 구성된 인서트 드릴의 작용을 설명하면 다음과 같다.Referring to the operation of the insert drill configured as described above are as follows.

먼저, 드릴몸체(20)의 선단부(21)에 드릴날부(10)를 결합시키고자 하면, 도 3과 같이 상기 선단부(21)의 설치홈(22)에 드릴날부(10)를 삽입시킨 다음, 상기 드릴날부(10)의 끼움부(13)가 설치홈(22)의 끼움공(23)에 끼움결합되도록 하고, 상기 선단부(21) 일측의 체결공(24)에 렌치와 같은 체결공구를 이용하여 조임볼트(25)를 단단히 조이게 되는데, 이때 상기 조임볼트(25)를 조이면 조일수록 테이퍼홈(14)으로 진입하는 조임볼트(25)에 밀려 드릴날부(10)가 하강하면서 더욱 단단히 고정됨과 동시에 도 4의 (b)와 같이 조임볼트(25)의 뾰족부(25a)가 테이퍼홈(14)과 설치홈(22)의 끼움공(23) 사이를 파고들게 되며, 상기 조임볼트(25)를 계속 조이게 되면 조임볼트(25)의 뾰족부(25a)가 문들어지면서 틀어 박히게 된다.First, when the drill blade 10 is to be coupled to the tip 21 of the drill body 20, the drill blade 10 is inserted into the installation groove 22 of the tip 21 as shown in FIG. The fitting portion 13 of the drill blade 10 is fitted to the fitting hole 23 of the installation groove 22, and using a fastening tool such as a wrench to the fastening hole 24 on one side of the tip portion 21. The tightening bolt 25 is tightened firmly. At this time, the tightening bolt 25 is tightened, and the drill blade 10 is pushed down to the tightening bolt 25 entering the tapered groove 14. As shown in (b) of FIG. 4, the pointed portion 25a of the tightening bolt 25 penetrates between the tapered groove 14 and the fitting hole 23 of the installation groove 22, and the tightening bolt 25 is removed. If it continues to tighten, the pointed portion (25a) of the tightening bolt 25 is rubbed and screwed.

즉, 도 4의 (a)와 같이 조임볼트(25)의 뾰족부(25a)가 테이퍼홈(14)과 설치홈(22)의 끼움공(23) 사이를 진입하여 고정되므로서 외부의 어떠한 진동이 발생하더라도 조임볼트(25)가 체결공(24)에서 빠지지 않는다.That is, as shown in (a) of FIG. 4, the pointed portion 25a of the tightening bolt 25 enters and fixes between the tapered groove 14 and the fitting hole 23 of the installation groove 22, thereby preventing any external vibration. Even if this occurs, the tightening bolt 25 does not fall out of the fastening hole 24.

따라서, 본 발명은 드릴날부(10)의 끼움부(13) 일측에 그 하단으로 갈수록 직경이 크지도록 테이퍼홈(14)을 형성하여 조임볼트(25)를 강하게 체결할수록 드릴날부(10)가 선단부(21)의 설치홈(22) 저부로 강하게 조임 결합되도록 하므로서 드릴날부(10)의 유동을 방지하는 한편, 플루트(26)를 벗어난 드릴몸체(20)의 상단 일측에 조임볼트(25)와 대응되는 체결공(24)을 하나만 형성하므로서 8㎜ 이하의 소직경 드릴에서도 드릴날부(10)의 착탈이 가능하게 함은 물론이고, 조임볼트(25)의 단부를 뾰족하게 형성하여 조임볼트(25)가 미세한 틈을 유지하고 있는 테이퍼홈(14)과 설치홈(22)의 끼움공(23) 내주연 사이를 파고 들어가 문들어지게 하므로서 작업시 인서트 드릴에 강력한 진동이 발생하더라도 체결공(24)으로부터 조임볼트(25)가 빠지는 것을 방지할 수 있는 매우 유용한 효과가 있다.Therefore, in the present invention, the tapered groove 14 is formed on one side of the fitting portion 13 of the drill blade 10 so that the diameter thereof becomes larger toward the lower end thereof. Tightening to the bottom of the installation groove 22 of the 21 to prevent the flow of the drill blade portion 10, while corresponding to the tightening bolt 25 on the upper end side of the drill body 20 out of the flute 26 Since only one fastening hole 24 is formed, the drill blade 10 can be attached and detached even in a small diameter drill having a diameter of 8 mm or less, and the end of the tightening bolt 25 is sharply formed to tighten the bolt 25. Is inserted between the inner periphery of the fitting hole 23 of the tapered groove 14 and the installation groove 22, which maintains a minute gap, so that the insert drill may be pulled out from the fastening hole 24 even when a strong vibration occurs in the insert drill. Very useful to prevent the tightening bolts 25 from falling out There is one effect.

Claims (1)

주절삭날(11)과 웨브절삭날(12)이 상단에 형성되고, 그 하단부에 소정길이의 끼움부(13)가 형성된 드릴날부(10)와; 선단부(21)에 드릴날부(10)가 삽입 고정되는 설치홈(22)이 형성되고, 상기 설치홈(22)에 드릴날부(10)의 끼움부(13)가 삽입되는 끼움공(23)이 형성되며, 상기 선단부(21)의 측부에 끼움공(23)과 다소 편심되게 조임볼트(25)가 체결되는 체결공(24)이 관통되고, 그 외주연에 나선형상의 플루트 (26)가 소정깊이 형성된 드릴몸체(20); 등으로 된 인서트 드릴에 있어서,A drill blade portion 10 having a main cutting blade 11 and a web cutting blade 12 formed at an upper end thereof, and a fitting portion 13 having a predetermined length formed at a lower end thereof; An installation groove 22 in which the drill blade portion 10 is inserted and fixed is formed in the tip portion 21, and a fitting hole 23 into which the fitting portion 13 of the drill blade portion 10 is inserted into the installation groove 22 is formed. A fastening hole 24 through which the fastening bolts 25 are fastened to the side of the distal end portion 21 to be fitted with the fitting hole 23 is somewhat eccentric, and a spiral flute 26 is formed at a predetermined depth at an outer circumference thereof. A drill body 20 formed; In an insert drill with a back, 상기 드릴날부(10)의 끼움부(13) 일측에 그 하단으로 갈수록 직경이 크지도록 테이퍼홈(14)을 형성하고, 플루트(26)가 형성되지 않은 드릴몸체(20)의 상단 일측에 조임볼트(25)와 대응되는 체결공(24)을 하나만 편심되게 형성하는 한편, 상기 조임볼트(25)의 단부에 테이퍼홈(14)과 설치홈(22)의 끼움공(23) 내주연 사이를 파고 들어갈 수 있게 뾰족부(25a)를 형성한 것을 특징으로 한 인서트 드릴.A tapered groove 14 is formed on one side of the fitting portion 13 of the drill blade 10 so that the diameter thereof becomes larger toward the lower end thereof, and a tightening bolt is formed on one side of the upper end of the drill body 20 in which the flute 26 is not formed. Only one fastening hole 24 corresponding to the 25 is formed eccentrically, while the end of the tightening bolt 25 is dug between the tapered groove 14 and the inner circumference of the fitting hole 23 of the installation groove 22. Insert drill, characterized in that the pointed portion (25a) is formed to enter.
KR1020010014774A 2001-03-22 2001-03-22 Insert drill Ceased KR20020074778A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
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KR100854081B1 (en) * 2006-07-26 2008-08-25 한국야금 주식회사 Cutting inserts for turning and milling
KR100968115B1 (en) * 2010-02-04 2010-07-06 가온전선 주식회사 Joinning system box
KR100969193B1 (en) * 2009-12-30 2010-07-09 (주)원영이엔지 Device for floor distributing wires
KR100968529B1 (en) * 2010-02-04 2010-07-09 가온전선 주식회사 Joining terminal box
CN102151881A (en) * 2011-04-25 2011-08-17 东莞市微创工具科技有限公司 A preparation method of a discarded drill bit and the discarded drill bit
CN102398062A (en) * 2011-11-25 2012-04-04 成都鑫三洋科技发展有限公司 Deep hole drill
CN105522201A (en) * 2016-01-25 2016-04-27 台州华达工量具制造有限公司 Drill with replaceable tool bit
KR20180029354A (en) * 2016-09-12 2018-03-21 문현옥 Drill bit for drilling depth adjustment
CN112676617A (en) * 2021-01-20 2021-04-20 美戈利(浙江)科技有限公司 Quick compound crown drill

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Publication number Priority date Publication date Assignee Title
JPH11197923A (en) * 1998-01-19 1999-07-27 Mitsubishi Materials Corp Throw-away drill
KR19990038034U (en) * 1998-03-18 1999-10-15 이정수 Insert Drill
JP2000107918A (en) * 1998-09-30 2000-04-18 Ngk Spark Plug Co Ltd Throw away tip and cutting tool
KR200193291Y1 (en) * 2000-02-17 2000-08-16 이정수 Insert drill

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH11197923A (en) * 1998-01-19 1999-07-27 Mitsubishi Materials Corp Throw-away drill
KR19990038034U (en) * 1998-03-18 1999-10-15 이정수 Insert Drill
JP2000107918A (en) * 1998-09-30 2000-04-18 Ngk Spark Plug Co Ltd Throw away tip and cutting tool
KR200193291Y1 (en) * 2000-02-17 2000-08-16 이정수 Insert drill

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100854081B1 (en) * 2006-07-26 2008-08-25 한국야금 주식회사 Cutting inserts for turning and milling
KR100969193B1 (en) * 2009-12-30 2010-07-09 (주)원영이엔지 Device for floor distributing wires
KR100968115B1 (en) * 2010-02-04 2010-07-06 가온전선 주식회사 Joinning system box
KR100968529B1 (en) * 2010-02-04 2010-07-09 가온전선 주식회사 Joining terminal box
CN102151881A (en) * 2011-04-25 2011-08-17 东莞市微创工具科技有限公司 A preparation method of a discarded drill bit and the discarded drill bit
CN102398062A (en) * 2011-11-25 2012-04-04 成都鑫三洋科技发展有限公司 Deep hole drill
CN105522201A (en) * 2016-01-25 2016-04-27 台州华达工量具制造有限公司 Drill with replaceable tool bit
KR20180029354A (en) * 2016-09-12 2018-03-21 문현옥 Drill bit for drilling depth adjustment
KR101865472B1 (en) * 2016-09-12 2018-06-07 문현옥 Drill bit for drilling depth adjustment
CN112676617A (en) * 2021-01-20 2021-04-20 美戈利(浙江)科技有限公司 Quick compound crown drill

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