KR20080046620A - End mill - Google Patents

End mill Download PDF

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Publication number
KR20080046620A
KR20080046620A KR1020080042551A KR20080042551A KR20080046620A KR 20080046620 A KR20080046620 A KR 20080046620A KR 1020080042551 A KR1020080042551 A KR 1020080042551A KR 20080042551 A KR20080042551 A KR 20080042551A KR 20080046620 A KR20080046620 A KR 20080046620A
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South Korea
Prior art keywords
end mill
flute
angle
processing
workpiece
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KR1020080042551A
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Korean (ko)
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박형규
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(주)에이치케이툴스
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Priority to KR1020080042551A priority Critical patent/KR20080046620A/en
Publication of KR20080046620A publication Critical patent/KR20080046620A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23C2222/28—Details of hard metal, i.e. cemented carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2265/00—Details of general geometric configurations
    • B23C2265/40—Spiral

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

An end mill is provided to increase life span and to perform serration process a workpiece to be processed regardless of the working direction by continuously forming cutting blades on the surface of flute parts in a screw type. An end mill comprises four flute parts(10), and cutting blades(20). The four flute parts have an inclined angle of 11° along the outer periphery of a body(1) and a twist angle of 30° to form the body by processing a circular rod of hardening material. The cutting blades, wherein spiral type recessed parts are arranged along the surface of the flute parts to have the angle of 50 to 90°, easily cut a workpiece to be processed regardless of the working direction. The type of the cutting blades is continuously arranged in a triangular or rectangular screw type.

Description

엔드밀 { end mill }End mill {end mill}

본 발명은 엔드밀에 관한 것으로, 더욱 상세하게 설명하면, 바디의 외주면에 형성된 플루트부의 비틀림각을 30°로 형성하되, 플루트부의 표면에는 나사산 형태로 절삭날이 연속적으로 형성된 형태로 구성됨으로써 작업방향에 상관없이 피가공물에 세레이션 가공을 할 수 있을 뿐만 아니라 절삭성이 향상되며, 공구의 수명이 증대된 엔드밀에 관한 것이다.The present invention relates to an end mill, and in more detail, the torsion angle of the flute part formed on the outer circumferential surface of the body is formed at 30 °, but the cutting direction is continuously formed in the form of a thread on the surface of the flute part to form a working direction. Regardless of whether the workpiece can be serrated, the machinability is improved, and the life of the tool is increased.

일반적으로 세레이션 가공이라 함은, 스플라인 가공의 일종으로 절삭되는 이의 모양이 작은 삼각형의 산모양으로 가공함으로써 이수가 많고, 피치가 조밀하며 이높이도 낮아 측압강도가 크기 때문에 동일 지름의 스플라인 가공보다 큰 회전력을 전달할 수 있어 각종 기계 기구류에 폭넓게 이용되며, 통상적으로 정적인 맞춤에만 사용되고, 슬라이딩에는 사용할 수 없는 가공물을 제작하는 절삭가공을 말한다.In general, serration processing is a kind of spline processing, which has a large number of teeth due to its small triangular mountain shape, its pitch is dense and its height is low, so that the side pressure strength is large. It is widely used in various kinds of machine tools because it can transmit rotational force, and is generally used only for static fitting, and refers to a cutting process for manufacturing a workpiece that cannot be used for sliding.

상기와 같은 세레이션을 가공하기 위해서 흔히 사용되는 가공방식은, 형성될 세레이션의 형상과 동일한 모양의 공구를 피가공물의 외주면을 따라서 압력을 가함과 동시에 수직이송시킴으로써 절삭이 이루어지도록 하여 세레이션을 형성하였다.The processing method commonly used to process the serrations described above is to cut the serrations by vertically transferring a tool having the same shape as the shape of the serrations to be formed along with the pressure along the outer circumferential surface of the workpiece. Formed.

상기와 같이 제작된 종래의 세레이션 가공에 사용되는 사이드 커터는 세레이션 가공속도가 매우 느릴 뿐만 아니라, 가공면의 정도도 낮은 단점이 있었고, 가공방향이 반드시 피가공물과 수직방향을 유지해야지 만이 세레이션 가공이 가능하여 작업방향과 작업조건에 많이 제약이 따르는 문제점을 내포하고 있었다.The side cutters used in the conventional serration processing manufactured as described above have the disadvantage that the processing speed of the serration is not only very slow, but also the degree of the processing surface is low, and the machining direction must be perpendicular to the workpiece. The process of migration was possible, which imposes a lot of restrictions on the working direction and working conditions.

또한, 세레이션 가공인 사이드 커터의 마모가 대단히 빨리 진행되어 공구교체에 따른 비용과 시간이 과도하게 소요되어, 가공비용의 상승을 초래하였을 뿐만 아니라, 사이드 커터의 가공에도 많은 시간이 소요되는 문제점을 내포하고 있었다.In addition, the wear of the side cutter, which is a serration process, proceeds very quickly, resulting in excessive cost and time due to the replacement of the tool, which leads to an increase in machining cost, and also requires a lot of time for the side cutter. It was implicated.

상기와 같은 문제점을 감안하여 발명된 본 발명은, 초경 재질의 환봉을 가공하여 바디(1)를 형성하되, 바디(1)의 외주면을 따라 경사각은 11°로 구성되고, 비틀림각은 30°로 구성된 네 개의 플루트부(10)와; 상기 플루트부(10)의 표면을 따라 나사산 형태의 요철부가 연속 배열되되, 요철부의 각도가 50 내지 90°로 형성된 절삭날(20)로 구성되어, 세레이션 가공을 필요로 하는 피가공물의 방향에 상관없이 용이하게 절삭할 수 있도록 한 대략적인 구성을 갖는다.The present invention in view of the above problems, while forming a body 1 by processing a round bar of cemented carbide material, the inclination angle is composed of 11 ° along the outer peripheral surface of the body 1, the torsion angle is 30 ° Four flute portions 10 configured; The concave-convex portions in the form of threads are continuously arranged along the surface of the flute portion 10, and the concave-convex portion is formed of a cutting edge 20 formed at an angle of 50 to 90 °, and is used in the direction of the workpiece to require serration processing. It has an approximate configuration that allows easy cutting regardless.

상기와 같이 구성된 본 발명은, 종래의 직선운동 형태로 가공되던 세레이션 의 가공을 엔드밀의 형태로 제작된 본 발명을 이용하여 회전운동 형태로 가공되도록 함으로써 작업방향에 구애받지 않고 수직 또는 수평방향으로 사용가능할 뿐만 아니라, 회전력에 의한 절삭으로 인해 종래의 세레이션 가공에 비해 절삭성이 뛰어나고, 절삭시간이 현저히 줄어드는 효과가 있다.The present invention configured as described above, by processing the serration that was processed in the conventional linear motion form in the rotary motion form by using the present invention made in the form of the end mill in the vertical or horizontal direction regardless of the working direction Not only can it be used, but also the cutting force is excellent compared to the conventional serration processing due to the cutting force, there is an effect that the cutting time is significantly reduced.

또한, 재연마로 인해 재사용이 가능하여 공구마모에 따른 세레이션 가공비용을 줄일 수 있을 뿐만 아니라, 공구의 마모가 기존의 사이드 커터에 비해 적어서 공구수명이 최소 5배 이상 향상되는 또 다른 효과가 있다.In addition, the re-polishing can be reused to reduce the serration processing cost due to tool wear, and the wear of the tool is less than that of the conventional side cutter, which has another effect of improving tool life by at least 5 times.

본 발명은 엔드밀에 관한 것으로, 바디의 외주면에 형성된 플루트부의 비틀림각을 30°로 형성하되, 플루트부의 표면에는 나사산 형태로 절삭날이 연속적으로 형성된 형태로 구성됨으로써 작업방향에 상관없이 피가공물에 세레이션 가공을 할 수 있을 뿐만 아니라 절삭성이 향상되며, 공구의 수명이 증대된 특징이 있다.The present invention relates to an end mill, wherein the torsion angle of the flute portion formed on the outer circumferential surface of the body is formed at 30 °, but the surface of the flute portion is formed in the form of cutting edges continuously formed in the form of a thread on the workpiece, regardless of the working direction. In addition to being able to perform serrations, the machinability is improved and the life of the tool is increased.

이하 본 발명의 실시 예를 예시도면을 통해 살펴보면 다음과 같다.An embodiment of the present invention will be described below with reference to the accompanying drawings.

우선, 도 1은 본 발명의 사시도를 나타낸 것이고, 도 2는 본 발명의 정면도를 나타낸 것이며, 도 3은 본 발명에 측단면도를 나타낸 것이고, 도 4a 및 도 4b는 본 발명의 사용상태도를 나타낸 것으로, 도시한 바와 같이, 초경 재질의 환봉을 CNC를 이용하여 외부형상을 가공하되, 플루트부(10)가 네 개로 형성되도록 바디(1) 를 가공한다.First, FIG. 1 shows a perspective view of the present invention, FIG. 2 shows a front view of the present invention, FIG. 3 shows a side cross-sectional view of the present invention, and FIGS. 4A and 4B show a state diagram of use of the present invention. , As shown, while processing the outer shape using a round bar made of cemented carbide CNC, the body 1 is processed so that the flute portion 10 is formed of four.

상기 플루트부(10)의 형태를 살펴보면, 바디(1)의 외주면을 따라서 경사각은 11°를 가지고, 비틀림각은 30°를 가지도록 구성되는바, 이러한 플루트부(10)가 형성됨으로 인해 칩의 배출이 원활하도록 하며, 비절삭 저항이 감소되어 엔드밀에 가해지는 충격이 줄어드는 특징이 있다.Looking at the shape of the flute portion 10, the inclination angle along the outer circumferential surface of the body 1 is configured to have an angle of 11 °, the torsion angle has a 30 ° bar, because such a flute portion 10 is formed of the chip Smooth discharge and reduced non-cutting resistance reduce the impact on the end mill.

플루트부(10)의 끝단은 통상의 엔드밀의 끝단과 동일한 형태로 제작됨으로 인해 완성된 본 발명을 이용하여 수직방향으로의 절삭가공이 가능한 구성을 갖는다.Since the end of the flute portion 10 is manufactured in the same form as the end of a conventional end mill, it has a configuration capable of cutting in the vertical direction by using the present invention completed.

또한, 상기 플루트부(10)의 표면을 따라서는 절삭날(20)이 형성되어 있는바, 그 형태는 삼각 나사산 형태의 요철부가 연속적으로 배열된 형태로 구성된다.In addition, the cutting edge 20 is formed along the surface of the flute portion 10, the shape is formed of a form in which the concave-convex portions of the triangular thread form is continuously arranged.

상기 연속 배열된 요철부의 각도는 50 내지 90°로 구성되며, 요철부에 형성된 피치는 0.8 내지 1.2mm로 구성되고, 요철부의 높이는 0.4 내지 0.6mm로 구성된다.The angle of the continuously arranged uneven portion is composed of 50 to 90 °, the pitch formed in the uneven portion is composed of 0.8 to 1.2mm, the height of the uneven portion is composed of 0.4 to 0.6mm.

위와 같이 플루트부(10)의 표면에 절삭날(20)이 연속적으로 형성됨으로 인해 완성된 본 발명을 이용하여 수평방향으로도 절삭가공이 가능한 구성을 갖는다.Since the cutting edge 20 is continuously formed on the surface of the flute part 10 as described above, the cutting blade 20 has a configuration capable of cutting in the horizontal direction by using the present invention.

본 발명에서는 절삭날(20)의 형태가 삼각 나사산 형태인 세레이션 가공용 엔드밀로 특정하여 설명하였지만, 통상의 지식을 가진 당업자라면 절삭날(20)의 형태 를 사각 나사산 형태로 변형하여 스플라인 가공용 엔드밀로 제작하는 등의 단순변형은 본 발명의 권리범위 내에 속하는 것이 자명한 사실이라 하겠다.In the present invention, the shape of the cutting edge 20 is specifically described as an end mill for serration processing in the form of a triangular thread, but those skilled in the art will deform the shape of the cutting edge 20 into a square thread form to an end mill for spline processing. Simple modifications such as manufacturing will be apparent that it falls within the scope of the present invention.

상기와 같이 구성된 본 발명의 보다 구체적인 실시 예를 살펴보면 다음과 같다.Looking at a more specific embodiment of the present invention configured as described above are as follows.

[실시 예][Example]

초경 재질의 환봉을 CNC로 절삭하여 직경 25mm의 바디(1)를 가공하되, 바디(1)의 선단으로부터 바디(1)의 중앙부까지는 네 개의 플루트부(10)를 형성하며, 플루트부(10)의 경사각과 비틀림각은 각각 11°와 30°가 되도록 제작한다.CNC machined round bar made of cemented carbide material to process a body 1 having a diameter of 25 mm, but four flute portions 10 are formed from the tip of the body 1 to the center portion of the body 1, and the flute portion 10 The inclination angle and torsion angle of are manufactured to be 11 ° and 30 ° respectively.

그런 다음, 상기 가공된 플루트부(10)의 표면에 세레이션을 형성하되, 세레이션의 각도는 75°로 형성하며, 세레이션에 형성된 피치는 1.02mm로 형성하고, 세레이션의 높이는 0.53mm로 형성함으로써 직경 25mm의 세레이션 가공용 엔드밀을 완성하였다.Then, the serration is formed on the surface of the processed flute portion 10, the angle of the serration is formed at 75 °, the pitch formed in the serration is formed to 1.02mm, the height of the serration is 0.53mm By forming, the end mill for serration processing of 25 mm in diameter was completed.

상기 제작된 세레이션 가공용 엔드밀을 이용하여 피가공물을 가공한 결과 칩이 잘게 분절되어 플루트부(10)로 칩의 배출이 용이하였고, 특히, 수직 혹은 수평방향으로 모두 세레이션 가공이 가능하였으며, 절삭시 공구의 떨림이 현저히 줄어들었고, 기존 사이드 커터에 비해 공구 수명이 5배 연장됨을 확인할 수 있었다.As a result of processing the workpiece by using the manufactured serration end mill, the chip was finely divided, so that the chip was easily discharged into the flute part 10, in particular, the serration process was possible in both the vertical and horizontal directions. The vibration of the tool was significantly reduced during cutting, and the tool life was extended by 5 times compared to the conventional side cutter.

도 1은 본 발명의 사시도1 is a perspective view of the present invention

도 2는 본 발명의 정면도2 is a front view of the present invention

도 3은 본 발명에 측단면도Figure 3 is a side cross-sectional view of the present invention

도 4a 및 도 4b는 본 발명의 사용상태도4a and 4b is a state diagram used in the present invention

[도면의 주요부분에 대한 부호의 설명][Explanation of symbols on the main parts of the drawings]

1: 바디 2: 피가공물1: body 2: workpiece

10: 플루트부 20: 절삭날10: flute part 20: cutting edge

Claims (3)

엔드밀에 있어서,In the end mill, 초경 재질의 환봉을 가공하여 바디(1)를 형성하되, 바디(1)의 외주면을 따라 경사각은 11°로 구성되고, 비틀림각은 30°로 구성된 네 개의 플루트부(10)와;Four fluted portions 10 formed by processing a round bar made of cemented carbide material to form a body 1, wherein the inclination angle is 11 ° along the outer circumferential surface of the body 1, and the torsion angle is 30 °; 상기 플루트부(10)의 표면을 따라 나사산 형태의 요철부가 연속 배열되되, 요철부의 각도가 50 내지 90°로 형성된 절삭날(20)로 구성되어, 세레이션 가공을 필요로 하는 피가공물(2)의 방향에 상관없이 용이하게 절삭할 수 있도록 함을 특징으로 하는 엔드밀.The uneven parts in the form of threads are continuously arranged along the surface of the flute part 10, and are formed of cutting edges 20 formed at an angle of 50 to 90 °, and the workpiece 2 requiring serration processing. End mill for easy cutting regardless of direction. 제 1항에 있어서,The method of claim 1, 상기 절삭날(20)의 형태가 삼각 나사산 형태로 연속 배열됨을 특징으로 하는 엔드밀.End mill, characterized in that the shape of the cutting edge 20 is arranged continuously in the form of a triangular thread. 제 1항에 있어서,The method of claim 1, 상기 절삭날(20)의 형태가 사각 나사산 형태로 연속 배열됨을 특징으로 하는 엔드밀.End mill, characterized in that the cutting edge 20 is continuously arranged in the form of a square thread.
KR1020080042551A 2008-05-07 2008-05-07 End mill KR20080046620A (en)

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Publication number Priority date Publication date Assignee Title
KR102370038B1 (en) 2020-09-29 2022-03-04 한국오에스지 주식회사 Endmill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102370038B1 (en) 2020-09-29 2022-03-04 한국오에스지 주식회사 Endmill

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