M268120 八、新型說明： 【新型所屬之技術領域】 本創作係有關於一鑽頭之切削部改良結構，尤指有關 於一種修正為較尖、鑽點呈一點（而非一線）之鑽尖，以改 進鑽頭之鑽孔定位力、切削力、散熱力與排屑力等鑽孔性 能。 【先前技術】 傳統的鑽削作業之鑽頭如第一圖、第二圖所示，其鑽 頭l〇a包含一圓柱型的切削部2〇a與鑽身3〇a，鑽身3〇a提供 一對螺旋凹槽40a及一夾持部5〇a。此夾持部5〇a係供鑽孔工 具之夾頭來固定。鑽頭10a的切削部2〇a一般為圓錐形，尖 端呈一陵線21a，並由此延伸出一對徑向相反的刀刃22&， 该刀刃22a之延伸部位並與螺旋凹槽4〇a相接。 上述之一般鑽頭l〇a由於該切削部2叱為圓錐形，且鑽 尖角度大於九十度，使得在鑿入工件時形成極大之鑽孔阻 力，使鑽孔效率不彰，加上逃屑設計不良，使鑽孔切削部 20a鑿出的殘屑無法有效排出而留在鑽孔内造成更大阻 力，並對鑽孔作業造成二次阻力；χ尤於習知與工作接觸 之鑽尖呈一陵線21a，以此陵線2ia在接觸工件時，其鑽孔 轭工之定位不易準確，常造成鑽孔位置產生誤差。 【新型内容】 ' 本創作之首要目的係在於本創作於鑽頭之切削部 面楔形錐之切削部鑽尖並在非刮面一側頂面之錐面開 二角尖角’以減小切削部與工作之摩擦力，並增加刮面之 M268120 S挖力；以到面之刀鋒口開·並刮除工件殘屑；以刮面旁 之排屑斜面來將殘屑導出孔外；㈣狀鑽线工件 趣 定位。 ^ 【實施方式】 茲配合圖式將本創作較佳實施例詳細說明如下。 參閱第三圖、第四圖、第五圖、第六圖及第七圖所示。 其鑽頭10主要包含有一鑽尖21與一鑽身22;該鑽身22包含 一延伸之夾持部50(夾持部50上亦可設有防滑齒51)與具有 至少兩徑向相反的螺旋凹槽40向夾持部5〇延伸至一適當長 度；該鑽尖21之切削部20設至少二個小於九十度之正面為 尖錐柱狀、側面為楔形錐的對稱面，兩對稱面之鑽尖21中 心呈一鑽點22，該對稱面之一非鑽削邊為錐面26，並在其 中一側錐面26上開有一倒三角尖角27延伸至切削部2〇之立 面，该對稱面之另一螺入面的一邊係為一前端外側231稍大 於鑽身30之刮面23，且其刮面23外側設有刀鋒口 24，且該 刮面23底部與鑽身30之收尾為倒勾狀；另在刮面23與鑽尖 21之間設有一條排屑斜面25由鑽尖21延伸至切削部2〇底 部。 續請參照第八圖所示，根據上述結構，在使用本創作 之鑽頭10鑽削工件60時，該由於鑽頭1〇切削部2〇之鑽尖21 呈一鑽點22，故可準確地在工件60作鑽孔61位置之定位， 且該鑽尖21之切削部20之楔形錐側面及刮面23前端外側 231大且後端小之再加上在一錐面26上所設之倒三角尖角 27結構設計，可令正面之刮面23獲得更大之鑿刮能力，且 M268120 在刮面23外緣所設之刀鋒口 24更能增益其鑿刮效率，而刮 面23所刨起之工件60殘屑62更可被刮面23旁之排屑斜面25 引至切削部20後端以排離切削部20，更可由鑽身3〇上之螺 旋凹槽40排出至工件60表面者。 由上述可知，本創作可經由設於鑽頭1〇領域獨創之在 該鑽尖21切削部20所設較尖之鑽尖21及正面尖錐柱狀、側 面楔形錐的對稱面、對稱面上之前端外側231稍大且後端縮 小之刮面23、在其中一側錐面26上所設倒三角尖角27及鑽 尖21呈一鑽點22等結構，而達到鑽孔η定位精準、鑽入工 件能力與排屑能力的提升，確實改進習知鑽頭鑽削工件過 慢及排屑不；1原缺失’已符合專射請要件。惟以上所述 者僅為本創作之-較佳實施例而已，並非用來限定本創 作實施之範圍。即驗摘料請專職圍賴的均等變 化與修飾，皆為本創作專利範圍所涵蓋。 M268120 【圖式簡單說明】 第一圖係習知鑽頭之俯視圖。 第二圖係第一圖之前視圖。 第三圖係本創作之立體圖。 第四圖係第三圖之俯視圖。 第五圖係第三圖之前視圖。 第六圖係第三圖之右側視圖。 第七圖係第三圖之左侧視圖。 第八圖係本創作較佳實施例之鑽孔排屑示意圖。 【主要元件符號說明】 [習知] 10a鑽頭 20a切削部 丨 21 a陵線 22a 71 7] 30a鑽身 40a螺旋凹槽 5 0 a夾持部 [本創作] 10鑽頭 20切削部 鑽尖 M268120 2 3到面 231前端外側 24刀鋒口 2 5排屑斜面 26錐面 27倒三角尖角 30鑽身 40螺旋凹槽 5 0夾持部 51防滑齒 60工件 61鑽孔M268120 VIII. Description of the new type: [Technical field to which the new type belongs] This creation relates to the improved structure of the cutting part of a drill bit, especially to a drill point that is modified to be sharper and the drill point is a bit (not a line). Improve the drilling performance of the drill such as positioning force, cutting force, heat dissipation and chip evacuation. [Prior art] As shown in the first and second figures, the drill bit for traditional drilling operations includes a drill bit 10a including a cylindrical cutting portion 20a and a drill body 30a. The drill body 30a provides A pair of spiral grooves 40a and a clamping portion 50a. This clamping portion 50a is fixed by a chuck of a drilling tool. The cutting portion 20a of the drill bit 10a is generally conical, and the tip is a ridge line 21a, thereby extending a pair of radially opposite cutting edges 22 & Pick up. Because the cutting part 2a is conical and the angle of the drill point is greater than ninety degrees, the general drill bit 10a described above forms a great drilling resistance when drilling into the workpiece, making the drilling efficiency poor, and the chip escape Poor design makes the residue cut out by the drilling cutting part 20a unable to effectively discharge, leaving more resistance in the borehole, and causing secondary resistance to the drilling operation; χ is particularly good at drill tips that are in contact with work. Yiling line 21a. When Lingling line 2ia touches the workpiece, the positioning of the drilling yoke is not easy and often causes errors in the drilling position. [New content] 'The primary purpose of this creation is to create the cutting point of the cutting part of the wedge cone of the cutting part surface of the drill bit and open a two-point sharp angle on the tapered surface of the top surface of the non-scraped side' to reduce the cutting part The frictional force with the work, and increase the digging force of the scraping surface M268120 S; open the blade edge to the surface and scrape off the workpiece debris; use the chip removal slope next to the scraping surface to lead the debris out of the hole; Interesting positioning of line artifacts. ^ [Embodiment] The preferred embodiment of the present invention is described in detail below with reference to the drawings. Refer to the third, fourth, fifth, sixth and seventh figures. The drill bit 10 mainly includes a drill tip 21 and a drill body 22; the drill body 22 includes an extended clamping portion 50 (the clamping portion 50 may also be provided with anti-skid teeth 51) and has at least two radially opposite spirals. The groove 40 extends to the clamping portion 50 to an appropriate length; the cutting portion 20 of the drill point 21 is provided with at least two symmetry planes with a sharp cone-shaped front surface and a wedge-shaped cone on the side, two symmetrical surfaces A drill point 22 is formed in the center of the drill point 21, and one of the non-drilling edges of the symmetry plane is a tapered surface 26. On one side of the tapered surface 26, an inverted triangular sharp angle 27 is extended to the elevation of the cutting portion 20. One side of the other screw-in surface of the symmetrical surface is a scraping surface 23 on the outside of the front end 231 which is slightly larger than the drill body 30, and a blade edge 24 is provided on the outer side of the scraping surface 23, and the bottom of the scraping surface 23 and the drill body 30 The tail end is in the shape of an inverted hook; in addition, a chip discharge inclined surface 25 is provided between the scraping surface 23 and the drill tip 21 and extends from the drill tip 21 to the bottom of the cutting portion 20. Continuing, please refer to the eighth figure. According to the above structure, when using the drill bit 10 of this creation to drill a workpiece 60, the drill point 21 of the cutting portion 2 of the drill bit 10 is a drill point 22, so it can be accurately The workpiece 60 is positioned at the position of the drilling 61, and the wedge-shaped cone side of the cutting portion 20 of the drill tip 21 and the outer side 231 of the front end of the scraping surface 23 are large and the rear end is small, plus the inverted triangle set on a cone surface 26 The structural design of the sharp angle 27 can make the scraping surface 23 on the front side obtain greater chisel scraping ability, and the knife edge 24 provided by M268120 on the outer edge of the scraping surface 23 can further increase its chisel scraping efficiency, while the scraping surface 23 is planed up. The debris 60 of the workpiece 60 can be further led to the rear end of the cutting portion 20 by the chip discharge inclined surface 25 next to the scraping surface 23 to escape from the cutting portion 20, and can be discharged to the surface of the workpiece 60 by the spiral groove 40 on the drill body 30. . From the above, it can be seen that this creation can be provided in the field of the drill bit 10, which is uniquely provided on the cutting point 20 of the cutting point 21 and the sharper point 21 of the cutting point 20 and the front side of the cone-shaped, side wedge-shaped cone, and the symmetry plane. The outer surface 231 of the front end is slightly larger and the rear end is reduced. The scraping surface 23, the inverted triangular sharp angle 27 and the drill point 21 on one side of the tapered surface 26 are a drill point 22, etc. The improvement of the ability to enter the workpiece and the chip removal ability has indeed improved the conventional drill bit to drill the workpiece too slowly and the chip removal is not; 1 the original missing 'has been in line with the special requirements for injection. However, the above is only the preferred embodiment of this creation, and is not intended to limit the scope of implementation of this creation. That is, the equal changes and modifications of the full-time inspection and requisitions are all covered by the scope of the creation patent. M268120 [Schematic description] The first figure is a top view of a conventional drill bit. The second image is a front view of the first image. The third picture is a three-dimensional view of this creation. The fourth figure is a top view of the third figure. The fifth figure is a view before the third figure. The sixth figure is a right side view of the third figure. The seventh diagram is a left side view of the third diagram. The eighth figure is a schematic diagram of drilling chip removal in the preferred embodiment of the present invention. [Description of main component symbols] [Knowledge] 10a drill bit 20a cutting part 丨 21 a Ling line 22a 71 7] 30a drill body 40a spiral groove 5 0 a clamping part [this creation] 10 drill bit 20 cutting part drill point M268120 2 3 to the surface 231 front end outside 24 blade edge 2 5 chip removal bevel 26 cone surface 27 inverted triangle sharp angle 30 drill body 40 spiral groove 5 0 clamping part 51 anti-skid teeth 60 workpiece 61 drilling