201223666 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種刀具，尤其涉及一種用於銑銷加工之刀 具0 【先前彳支術】 [0002] 塑膠產品成型時通常會留有加工餘量，精加工時需藉由 刀具將該成型時產生之加工餘量切削去除。刀具切削過 程中高速轉動，與產品摩擦會產生大量之摩擦熱，使塑 八 膠產品表面被熔化，從而導致切削加工完成後，於塑膠 Ο 產品表面產生毛刺，嚴重影響了產品之外觀。 【發明内容】 ' [0003] 有鑒於此，有必要提供一種可有效減少毛刺產生之刀具 [0004] 一種刀具包括切削刃。切削刃具有第一側刃面、第二側 刃面及底面。第一側刃面與第二侧刃面相交且形成刃交 線。第一侧刀面與底面相交且形成前刀刃。第二側刃面 〇 與底面形成後刀刃。刃交線、前刀刃與後刀刃共同相交 且相交處形成刃尖。刃交線位於刃尖位置處之切線與底 面之夾角範圍為30度至60度。 [0005] 由於刃交線於刃尖位置處之切線與底面傾斜相交之相交 角度範圍為30度至60度，採用刀具銑銷工件時，刃尖切 削工件之待切削部位，接觸面積小，與工件接觸產生之 摩擦熱較少，從而減少因工件表面熔化而形成毛刺。 【實施方式】 [0006] 請參閱圖1，本發明實施方式之刀具100包括刀柄20、刀 099141612 表單編號A0101 第3頁/共10頁 0992072339-0 201223666 頸30及刀頭40。刀頭40藉由刀頸3〇連接於刀柄2〇之一端 。於本實施方式中，刀具1〇〇用來加工材質為丙烯腈—丁 二烯-苯乙烯共聚物（ABS塑膠）之工件（圖未示）。 [0007] [0008] [0009] 刀柄20包括刀把21及與刀把21—端固定連接之安裝端22 。安裝端22呈錐形，其截面直徑沿遠離刀把21之方向逐 漸減小。刀頸30固定設置於安裝端22遠離刀把21之一端 l· 〇 刀頭40固定裝設於刀頸3〇上。刀頭4〇包括刀盤5〇及複數 切削刃60。刀盤50呈圓盤狀。複數切削刃6〇相互間隔地 凸設於刀盤50之外圓周上，且相鄭二切削刀6〇間隔之距 離相同。每二相鄰之切削刃6〇之間形成有排屑槽61。於 本實施方式中，排屑槽61之寬度範圍設置為 0. 8mm-1 · 1 mm。相對應地，切削刃6 〇之數量為8、9或1 〇 。可以理解’排屑槽61之寬度也可以根據工件之材質性 質設定為其他數值。相對應地，初則稃之數量也可以 為其他數量，如2、3、4、5、6、7或12等。 凊一併參閱圖2及圖3，每一切削刃6 0大致呈弧形塊狀， 具有朝向刀頸30—側之頂面62、第一侧刃面63、第二側 刃面64及與頂面62相對且遠離刀頸30—侧之底面65。第 一側刃面6 3為一由頂面6 2朝向底面6 5傾斜且沿順時針方 向彎曲之弧形曲面，第一側刃面63與底面65相交形成— 弧形之前刀刃71。第二側刃面64為一由頂面62朝向底面 65傾斜且朝向第一側刃面63彎曲之弧形曲面，第二側刀 面6 4與第一側刃面6 3相交形成一傾斜之弧形刃交線7 2， 第二側刀面64與底面65相交形成一後刀刃73。對應地， 099141612 表單編號A0I01 第4頁/共10頁 °992072339-0 201223666 前刀刃71、刃交線72及後刀刀73相交形成一刀尖81，以 對工件進行剖切。優選地，刃父線7 2位於刀尖81位置處 之切線與底面65傾斜相交’相交角度α範圍為30-60度。 前刀刃71之前角範圍為5-3〇度°相交角度α與前角之大 小可根據工件之材質性質設定。前角愈大則前刀刃71對 工件剖切後形成之表面之端銳量則愈大。於本實施方式 中，相交角度α為45度。為對刃尖81剖切過之工件表面 進行拋光處理’前角設置為8度。 0 [0010] 由於刃交線72位於刃尖81位置處之切線與底面65傾斜相 交之相交角度α範圍為30-60度’採用刀具1〇〇銑銷工件 時，刃尖81切削工件之待切舸刀位，接觸面積小，與工 件接觸產生之摩擦熱較少’從而減少因工件表面熔化而 形成毛刺。另，由於刀具100之前刀刃71之前角範圍為 5-30度，前刀刃71可同時實現端銑功能，從而可對刃尖 81剖切過之工件表面進行拋光處理，進一歩改善工件之 外觀。 ❹ [0011] 综上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化 ，皆應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 [0012] 圖1係本發明實施方式之刀具之立體組裝圖。 [0013] 圖2係圖1中II處之放大圖。 099141612 表單編號Α0101 第5頁/共10頁 0992072339-0 201223666 [0014] 圖3係圖1所示刀具之主視圖。 【主要元件符號說明】 [0015] 刀具100 [0016] 刀柄20 [0017] 刀把21 [0018] 安裝端22 [0019] 刀頸30 [0020] 刀頭40 [0021] 刀盤50 [0022] 切削刃6 0 [0023] 排屑槽61 [0024] 頂面62 [0025] 第一侧刃面 63 [0026] 第二側刃面 64 [0027] 底面6 5 [0028] 前刀刃71 [0029] 刃交線7 2 [0030] 後刀刃73 [0031] 刃尖81 099141612 表單編號A0101 第6頁/共10頁 0992072339-0201223666 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a tool, and more particularly to a tool for milling and machining 0 [Previous 彳 术 】 [0002] Plastic products usually have a shape when they are formed Machining allowance, the machining allowance generated during the forming is cut by the cutter. During the cutting process, the tool rotates at a high speed, and friction with the product generates a large amount of frictional heat, which causes the surface of the plasticized rubber product to be melted, which causes burrs on the surface of the plastic enamel product after the cutting process is completed, which seriously affects the appearance of the product. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide a tool that can effectively reduce burr generation. [0004] A tool includes a cutting edge. The cutting edge has a first side blade face, a second side blade face, and a bottom face. The first side face intersects the second side face and forms a blade intersection. The first side knife face intersects the bottom surface and forms a front cutting edge. The second side blade 〇 forms a rear edge with the bottom surface. The edge line, the front edge and the rear edge intersect at the same point and form a cutting edge at the intersection. The intersection of the tangential line at the edge of the blade at the edge of the blade is between 30 and 60 degrees. [0005] Since the intersection angle of the tangential line at the edge of the blade edge and the slanting of the bottom surface is in the range of 30 degrees to 60 degrees, when the workpiece is milled by the cutter, the cutting edge of the workpiece to be cut is small, and the contact area is small. The frictional heat generated by the contact of the workpiece is less, thereby reducing the formation of burrs due to melting of the surface of the workpiece. Embodiments [0006] Referring to FIG. 1, a tool 100 according to an embodiment of the present invention includes a shank 20, a knife 099141612, a form number A0101, a third page, a total of 10 pages, a 0992072339-0201223666 neck 30 and a cutter head 40. The cutter head 40 is coupled to one end of the shank 2 by a neck 3 。. In the present embodiment, the cutter 1 is used to process a workpiece (not shown) made of acrylonitrile-butadiene-styrene copolymer (ABS plastic). [0008] [0009] The shank 20 includes a shank 21 and a mounting end 22 that is fixedly coupled to the end 21 of the shank. The mounting end 22 is tapered and its cross-sectional diameter is gradually reduced in a direction away from the handle 21. The neck 30 is fixedly disposed on the mounting end 22 away from one end of the handle 21. l The cutter head 40 is fixedly mounted on the neck 3〇. The cutter head 4 includes a cutter head 5 〇 and a plurality of cutting edges 60. The cutter head 50 has a disk shape. The plurality of cutting edges 6 are protruded from each other on the outer circumference of the cutter head 50, and the distance between the two cutters 6 is the same. A chip flute 61 is formed between each two adjacent cutting edges 6〇. In the present embodiment, the width of the chip flute 61 is set to be 0. 8 mm -1 · 1 mm. Correspondingly, the number of cutting edges 6 为 is 8, 9 or 1 〇 . It can be understood that the width of the chip flute 61 can also be set to other values depending on the material properties of the workpiece. Correspondingly, the number of initial 稃 can also be other quantities, such as 2, 3, 4, 5, 6, 7, or 12. Referring to Figures 2 and 3 together, each cutting edge 60 has a generally arcuate block shape with a top surface 62 facing the neck 30 side, a first side blade surface 63, a second side blade surface 64, and The top surface 62 is opposite and away from the bottom surface 65 of the neck 30 side. The first side blade surface 63 is an arcuate curved surface which is inclined from the top surface 62 toward the bottom surface 65 and curved in a clockwise direction, and the first side blade surface 63 intersects the bottom surface 65 to form a curved front blade 71. The second side blade surface 64 is an arcuate curved surface which is inclined from the top surface 62 toward the bottom surface 65 and curved toward the first side blade surface 63. The second side knife surface 64 intersects the first side blade surface 63 to form a slope. The curved blade intersection line 7 2, the second side knife face 64 intersects the bottom surface 65 to form a rear cutting edge 73. Correspondingly, 099141612 Form No. A0I01 Page 4 of 10 °992072339-0 201223666 The front cutting edge 71, the cutting edge line 72 and the rear knife 73 intersect to form a cutting edge 81 for cutting the workpiece. Preferably, the tangential line of the blade parent line 7 2 at the position of the cutting edge 81 is obliquely intersected with the bottom surface 65. The angle of intersection α ranges from 30 to 60 degrees. The front angle of the front cutting edge 71 is 5-3 °. The angle of intersection α and the front angle can be set according to the material properties of the workpiece. The larger the rake angle, the greater the sharpness of the end surface of the surface formed by the front cutting edge 71 after the workpiece is cut. In the present embodiment, the intersection angle α is 45 degrees. In order to polish the surface of the workpiece cut by the cutting edge 81, the rake angle is set to 8 degrees. 0 [0010] Since the intersection angle of the tangential line of the blade intersection line 72 at the position of the blade edge 81 and the slanting intersection of the bottom surface 65 is in the range of 30-60 degrees, when the workpiece is milled by the cutter 1 , the cutting edge 81 cuts the workpiece. The cutting position is small, the contact area is small, and the frictional heat generated by contact with the workpiece is less, thereby reducing the formation of burrs due to melting of the workpiece surface. In addition, since the front edge of the cutting edge 71 of the tool 100 ranges from 5 to 30 degrees, the front cutting edge 71 can simultaneously realize the end milling function, so that the surface of the workpiece cut by the cutting edge 81 can be polished to further improve the appearance of the workpiece. [0011] In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0012] FIG. 1 is a perspective assembled view of a tool according to an embodiment of the present invention. 2 is an enlarged view of II in FIG. 1. 099141612 Form No. Α0101 Page 5 of 10 0992072339-0 201223666 [0014] FIG. 3 is a front view of the tool shown in FIG. [Main component symbol description] [0015] Tool 100 [0016] Tool holder 20 [0017] Tool holder 21 [0018] Mounting end 22 [0019] Neck 30 [0020] Cutter head 40 [0021] Cutter head 50 [0022] Cutting Edge 6 0 [0023] Chip flute 61 [0024] Top surface 62 [0025] First side blade surface 63 [0026] Second side blade surface 64 [0027] Bottom surface 6 5 [0028] Front cutting edge 71 [0029] Intersection line 7 2 [0030] Rear blade 73 [0031] Blade tip 81 099141612 Form number A0101 Page 6 of 10 Page 0992072339-0