1276487 九、發明說明： 【發明所屬之技術領域】 本發明主要是有關於一種機械銳床所使用的銑刀結 構’尤其是一種具有漸縮本體的銑刀結構。 【先前技術】 一般傳統的銑刀（8 0 )結構係如同在第六圖中所示， 其由刀頭的邊緣（A )直到其有效切削深度（h )整段均 均與銑刀（8 0 )軸心平行，所以其在切削時，其在有效 _ 切削深度（h )的側面均不斷的和工件的壁面（M)作磨 擦，以至於當切削愈深時，整支銑刀（8 〇 )和工件（9 • 〇 )壁面間的接觸面愈大，以致增加磨擦力，並造成整支 •銑刀（8 〇 )的溫度不斷的昇高，以及切削速度變慢，進 -而造成銑刀（8 0 )在操作過程中極易的損壞，造成使用 哥命大幅的減少。 為了能有效的降低銑刀（8 〇 )於工作時的溫度，一 種新賴的銳刀（8 0 a ) #臃；w二丄 丄 、C u a j便應運而生；這類的銑刀（8 〇 a)則如同在第七圖中所示者，如圖令可知，此類的銳刀 (80:)是具有由刀帛（B)朝向刀身（c)而整體一 漸縮。這種銑刀（8 D a μ p a 士 ϋ a )於刼作時，由於其刀身（◦) 部份具有漸縮的特性，故而苴古 故而其末端刀頭部（B )和工件（9 〇 )的壁面（Μ)間呈點接觸， 么 向刀身部並不會和切削壁 面產生接觸，進而，1刀杳Γ . 八身（c)的溫度亦不會因此不斷 的升间，由此，其使用的壽限 Λ 0 n j J大巾田的延長。然而，此 類的銑刀（8 〇 a )仍鈇有苴缺 I，、、有八缺點，那就是此類的銑刀（8 4 1276487 的作時，因為刀頭部（B )和工件（9 〇 )辟 呈點接觸，所以其刀頭部（B)的切削面會在 二面 的壁面（M)上留下條紋狀的切痕 9〇) (B )容易崩裂而造成銑 ^疋刀碩邹 p 丄 （8 0 a )的損壞，而無法推 在第六圖中所示之第一稽抑田 像 ^包十 白用的銑刀（8 0 )應用其直 狀的刀身來對工件（9 ΓΜ沾啟I 息同 Γ义 〔9〇)的壁面所產生的毛邊予以去除。 【發明内容】 & ° ,為能達成上述的目的，本發明主要是在提供一 削功能的銑刀結構。 ”刀 本發明所使用的技術手段則是令_銳刀結構具有 ，遠刀身底端形成有-刀頭部，刀身的外徑自刀頭 端向上漸縮，該刀頭部係具複數個自銑刀軸心徑向突伸出 的刀刃部，各刀刀部外側面分別形成有一削除面，該心 ㈣與銑刀軸心平行。由此，該削除面因為與銑刀轴心二 仃：且具有-定的高度，故而被銑刀切削的工件之切削壁 面壬現平坦狀而不具有毛邊，而漸縮的刀身則因為不與工 件的切削壁面接觸，令銑刀與工件間的摩擦降低，故可減 >銑刀μ度的增溫速率，令銳刀單次的加工時間延長。 本創作之銑刀於操作時，無論其加工深度多深，其和 工件壁面間的接觸面積均為削除面的大小，故而其可具有 保持其刀碩部強度、去毛邊及減少磨擦面積等多重功能。 【實施方式】 請參看本發明所附圖式的第一、二圖，其中，本發明 的銑刀（1 〇 )係具有一刀身（1 2 )及一刀頭部（2 2 ) ’· 5 1276487 其中，刀頭部（1;L)形成於刀身（12)底端，該刀身 (12)的外徑自刀頭部（11)頂端向上漸縮；該刀頭 部（11)具有複數個自銑刀（i 0 )軸心（χ)徑向突 伸出的刀刃部，各刀刃部外側面分別形成有—削除面（工 1 )，該削除面（i i i)係與銑刀（i 〇)車由心（χ) 平行’且該削除面（；L i )的高度（Η )係介於軸心（X ) 到削除面（1 1)之距離的5 %一5〇%。請進一步參昭 第三圖，該銑刀（1 〇 )在其刀頭部（2 Ί )具 (Η )的範圍内均是稱之為削除 ^ y 、丄丄丄），而刀身（1 2 )外側面和削除面（1 1 1 )之間則是夹著-角度（θ )， 該角度（Θ)大於0度且在2〇度以下，較佳的：圍則是 大於0且在1〇度以下。 如第二圖所示，當本發明的銳刀（1 0 )於使用時’ 可見及其削除面（1 i i )可輕易地在一工件（2㈧的 表面切削出所欲呈現出來的圖樣，而且其削除面（ι 與銑刀（1 0)軸心（x)平行的特點則可令在工件（2 〇)遭切削壁面處呈現平坦外觀而不產生任何毛邊；再者， 由於刀身（1 2)的外徑是為漸縮狀，故而t刀頭（丄 的削除面（：L ]_ ：!)持續的在 々,士 i a 仟Q 2 〇 )的表面形成圖 合敫^ 凹^ ) 4，该刀身（1 2 )並不 件（2 0)的凹槽壁面間產生接觸與摩擦，故 而整個銑刀（1◦)溫度的增溫速率可有效降低，進而， 銑刀U0)的使用時間則可因此而予以延長。另外，如 同在第四圖中所示的另-個銳刀（10a)實施例，其中， 6 0 ) 1276487 忒刀碩（1 1 )是為具有螺紋狀的刀身（工2 )。 請參看第五圖所示，其中，可見及本發明銳 、’構於刀頭部（1 1 )的各刀刃部底面呈-弧形狀。 由上所述，可知本創作之銑刀（1 〇)(丄n 操作時’無論其加工深度多深，其和工件（2 0 的接觸面均為削除面(1 1 1 )的大小，故而其可二: /、 °卩（1 1 )強度、去毛邊及減少磨擦面積等f # 功能。 W寺夕重 【圖式簡單說明】 第一圖：為本發明銑刀結構的立體圖； 第二圖：為本發明銑刀結構的側視圖； 第二圖：為本發明銑刀結構於使用狀態的示意圖； 第四圖：為本發明銑刀結構另種狀態的平面示意圖； 第五圖：為本發明銑刀結構刀頭部底面的示意圖·， 第六圖：為第一種習用銑刀結構的側視示意圖；以及 第七圖：為第二種習用銑刀結構的側視示意圖。 (1 0 a )銑刀 (1 1 1 )削除面 (2 〇 )工件 (8 〇 a )銑刀 (Η )高度 (A )邊緣 【主要元件符號說明】 (10)銳刀 (1 1 )刀頭部 (1 2 )刀身 (8 〇 )銑刀 (9 〇 )工件 (θ )角度 7 1276487 (h )有效切削深度 （Μ)壁面 (B )刀頭部 （C )刀身(X )軸心 _1276487 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates generally to a milling cutter structure used in a mechanical sharp bed, particularly a milling cutter structure having a tapered body. [Prior Art] The conventional conventional milling cutter (80) structure is as shown in the sixth figure, which is from the edge of the cutter head (A) until the effective depth of cut (h) is the same as the milling cutter (8). 0) The axis is parallel, so when it is cutting, it is continuously rubbed against the wall surface (M) of the workpiece at the effective cutting depth (h), so that when the cutting is deeper, the whole milling cutter (8)愈) The larger the contact surface between the wall and the workpiece (9 • 〇), the more the frictional force is increased, and the temperature of the whole mill (8 〇) is continuously increased, and the cutting speed is slowed down. The milling cutter (80) is extremely easy to damage during operation, resulting in a significant reduction in the use of the scorpion. In order to effectively reduce the temperature of the milling cutter (8 〇) during operation, a new sharp knife (8 0 a ) #臃;w 二丄丄, C uaj came into being; such a milling cutter (8 〇a) As shown in the seventh figure, as shown in the figure, such a sharp knife (80:) has a whole shape which is tapered toward the blade body (c) by the blade (B). This type of milling cutter (8 D a μ pa gay a ) has a tapered shape due to its blade body. Therefore, the end of the cutter head (B) and the workpiece (9 〇) ) The wall surface (Μ) is in point contact, so that the blade body does not come into contact with the cutting wall surface, and thus, the temperature of the eight body (c) does not rise continuously. The life limit of its use Λ 0 nj J is extended by the large towel field. However, this type of milling cutter (8 〇a ) still has a defect I, and has eight disadvantages, that is, the milling cutter of this type (8 4 1276487 when working because of the head (B) and the workpiece ( 9 〇) is in point contact, so the cutting surface of the knife head (B) will leave a stripe-shaped cut on the wall (M) on both sides. 9) (B) It is easy to crack and cause milling The damage of the master Zou p 丄 (80 a), and can not be pushed in the first figure shown in the sixth figure, the milling cutter (8 0) used for the white bag is applied to the workpiece by its straight blade. (9 ΓΜ 启 I I I I want to remove the burrs from the wall of the Γ义 [9〇). SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is mainly directed to a milling cutter structure that provides a cutting function. The technical means used in the invention is that the _ sharp knife structure has a - knife head formed at the bottom end of the far blade body, and the outer diameter of the blade body is tapered upward from the cutter head end, and the cutter head is provided with a plurality of self-milling a cutting edge portion radially protruding from the arbor center, a cutting surface is formed on each of the outer sides of each knives, and the core (4) is parallel to the axis of the milling cutter. Therefore, the cutting surface is different from the axis of the milling cutter: With a fixed height, the cutting wall of the workpiece cut by the milling cutter is flat without burrs, and the tapered blade is not in contact with the cutting wall surface of the workpiece, so that the friction between the milling cutter and the workpiece is reduced. Therefore, the temperature increase rate of the milling cutter μ degree can be reduced, and the processing time of the sharp knife can be extended for a single time. The milling cutter of the present invention is operated, regardless of the depth of the processing, the contact area with the workpiece wall surface is The size of the face is removed, so that it can have multiple functions such as maintaining the strength of the blade, deburring, and reducing the friction area. [Embodiment] Please refer to the first and second figures of the drawings of the present invention, wherein the present invention Milling cutter (1 〇) has a knife Body (1 2 ) and a knife head (2 2 ) '· 5 1276487, wherein the blade head (1; L) is formed at the bottom end of the blade body (12), and the outer diameter of the blade body (12) is from the blade head (11) The tip end is tapered upwardly; the blade head portion (11) has a plurality of blade portions protruding radially from the axis (χ) of the self-milling cutter (i 0 ), and the outer sides of the blade portions are respectively formed with a cutting surface (work 1 ), the cutting surface (iii) is parallel to the milling cutter (i 〇) from the center (χ) and the height (Η) of the cutting surface (; L i ) is between the axis (X) and the cutting surface ( 1 1) The distance is 5% to 5%. Please refer to the third figure. The milling cutter (1 〇) is called the cutting in the range of the head (2 Ί ) (Η). ^ y , 丄丄丄 ), and between the outer side of the blade ( 1 2 ) and the cutting surface (1 1 1 ) is the angle-angle (θ), which is greater than 0 degrees and less than 2 degrees. Preferably, the circumference is greater than 0 and less than 1 degree. As shown in the second figure, when the sharp knife (10) of the present invention is visible and can be seen, the face (1 ii ) can be easily used. Cutting the surface to be presented on the surface of a workpiece (2 (8), And its cutting surface (m parallel to the axis (x) of the milling cutter (10) can make the workpiece (2 〇) have a flat appearance at the cutting wall without any burrs; further, due to the blade (1 2) The outer diameter is tapered, so the t-cutting head (the cutting surface of the crucible (:L]_:!) continues to form on the surface of the crucible, ia 仟Q 2 〇). 4. The blade body (1 2 ) does not cause contact and friction between the groove wall surfaces of the piece (20), so the temperature increase rate of the entire milling cutter (1◦) can be effectively reduced, and further, the use of the milling cutter U0) Time can be extended accordingly. Further, as another embodiment of the sharp knife (10a) shown in the fourth figure, wherein 60 0 1276487 is a threaded blade (work 2). Referring to the fifth figure, it can be seen that the bottom surface of each blade portion of the blade head (1 1 ) is sharply curved. From the above, we can know the milling cutter (1 〇) of this creation (when 丄n is operated, no matter how deep the machining depth is, the contact surface of the workpiece and the workpiece (the contact surface of 20 is the size of the cutting surface (1 1 1 )). It can be two: /, ° 卩 (1 1 ) strength, deburring and reducing the friction area f # function. W Temple 夕重 [Simple diagram description] The first picture: the perspective view of the milling cutter structure of the present invention; Figure: is a side view of the structure of the milling cutter of the present invention; Figure 2 is a schematic view of the structure of the milling cutter of the present invention in use; Fourth: a schematic plan view of another state of the milling cutter structure of the present invention; Schematic diagram of the bottom surface of the cutter head of the milling cutter of the present invention, sixth drawing: a side view of the first conventional milling cutter structure; and seventh drawing: a side view of the second conventional milling cutter structure. 0 a ) Milling cutter (1 1 1) cutting surface (2 〇) workpiece (8 〇a) milling cutter (Η) height (A) edge [Main component symbol description] (10) Sharp knife (1 1) knife head (1 2 ) blade (8 〇) milling cutter (9 〇) workpiece (θ) angle 7 1276487 (h) effective depth of cut (Μ) wall surface (B) knife head (C) Blade (X) Axis _
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