201043364 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種鑽頭’尤指一種印刷電路版的微小 鑽頭。 【先前技術】 已知，目刖的印刷電路版在表面上的線路製作完成後 ，於该線路的焊點（銅箔）上進行鑽孔，以供電子零件的 導電接腳可插接於焊點中的鑽孔裡。 ° 在印刷電路版進行焊點的鑽孔製作時，該排屑問題是 一個極重要的課題。因為排屑不良除了會造成鑽孔後電路 版孔内品質不良外，有時會因殘留粉屑造成孔位精度不良 ’進而造成鑽頭使用孔數減少。 由於鑽頭在對電路版上的焊點進行鑽孔’在鑽孔過程 中所產生的粉屑由鑽孔機上方的集塵裝置集中吸走，使鑽 孔保持清潔。但是，傳統的鑽頭30 ,如第一圖所示，該鑽 〇頭30的頸部301係採階梯狀設計，在對印刷電路版鑽^， 會使階梯狀的交接處產生奮流現象，使鑽孔機上方的集塵 裝置無法集中吸走，讓排屑效果降低，而造成孔位精度及 孔内品質不良。 另-種鑽頭40，如第二圖所示’該鑽頭仙的頸部4〇1 雖然無階梯狀設計，但是由於圓錐面的角度過大（在U度 以上）’使排屑流場不順㉟，導致鑽孔機上方的集塵裝置 無法集中將屑吸走，造成排屑效果降低，而造成孔位精度 及孔内品質不良。 3 201043364 【發明内容】 本發明之主要目的，扃 小型鑽頭的頸部不採階梯狀設計，並::二;:::之微 =鑽孔過程中不會產生资流現象，使鑽孔機上= 吸走，讓_果良好，，孔= 型鑽括本發明提供-種印刷電路版的微小 切兮刀刃# #上具有—鑽尖及—切屑排出槽。在本圖 式中3亥刀刃部的鑽尖為12〇度； ㈣’其上前端具有—呈圓錐狀的頸部，該頸部設 有一頂部及-底面，該頂部與該刀刀部的末端相連接； /、中η亥頂σ[5垂直至該底面的中心點的中心線與圓錐 面之間所形成的夾角為10度± 3度。 【實施方式】 茲有關本發明之技術内容及詳細說明，現配合圖式說 明如下： 睛參閱第三圖，係本發明之微小型鑽頭外觀示意圖。 f圖所示：本發明之印刷電路版的微小型鑽頭結構改良， °玄鑽頭10包括：—刀刃部1及該刀刃部1末端延伸有-柄 。亥刀刀部1其上具有一鑽尖丨丨及一切屑排出槽12。在 曰式中及刀刃部1的鑽尖11為120度，其徑尺寸範圍 〇. 5麵〜0. 05咖。 201043364 該柄部2，其上前端具有一呈圓錐狀的頸部21，該頸 邛21上δ又有一頂部22及一底面23，該頂部22與該刀刃部1 的末知相連接’以形成一鑽頭1〇。 請參閱第四圖，係本發明之鑽頭的頸部局部放大示意 圖。如圖所示：該頸部21具有一頂部22及一底面23的圓錐 體。該頂部22垂直至該底面23的中心點231的中心線232 與圓錐面24之間所形成的夾角（0 )為1〇度± 3度（7度 〜13度），但是以10度為最佳。 〇 凊參閱第五圖，係本發明之使用狀態示意圖。如圖所 不.當本發明之微小型鑽頭1〇在鑽孔機上對印刷電路版2〇 進行鑽孔％，由於該本發明的鑽頭丨〇的頸部？！的角度小， 所以刀刃部與頸部21與印刷電路版2〇所產生的集塵真空向 上不會產生奮流（亂流）現象，讓鑽孔機上的集塵裝置 可以將鑽孔所產生的屑吸走集中，使鑽孔保持清潔，以得 到良好的鑽孔品值。 ^ 明參閱苐，、圖3為本發明之鑽尖為1邡度與頸部度 ± 3度的微小型鑽頭在孔位精度的實際鐵孔測試與第六圖 b傳統鐵尖為130度與頸部（階梯狀）2〇度的鑽頭在孔位 精度的實際鑽孔測試的示意圖。兩者在相同條件下（0.3麵 尺寸新針、孔數3000、4片鑽）。 I先’如第六圖b的鑽頭測試後，該孔位精度CpK在 h 812，孔内品質（孔内粗键度）為0.45。 而本發明之鑽碩測試後，如第六圖a，該孔位精度在 2. 451 ，孔内品質〇. 35。 5 201043364 後，該孔位 孔内品質由 因此本發明 質提昇外， 用來限定本 所做的均等 由此可知，本發明將鑽頭頸部的角度縮小 精度由1.812提昇到2.451 ，提昇了 ％%。而 0.45提昇至較不粗糙的〇 35，而提昇了 22%。 改良後的微小_頭除了讓孔位精度及孔内品 也讓鑽尖面有良好的磨耗表現。 ^述僅為本發明之較佳實施例而已，並非 發明實施之範圍。即凡依本發明申請專利範圍 ，化與修飾，皆為本發明專利範園所涵蓋。 【圖式簡單說明】 \ S為第種傳統的印刷電路版鑽孔使用的鑽頭外觀 示意圖。 第一圖，為第二種傳統的印刷電路版鑽孔使用的鑽頭外觀 示意圖。 j二圖，係本發明之微小型鑽頭外觀示意圖。 第四圖，係本發明之鑽頭的頸部局部放大示意圖。 第五圖，係本發明之使用狀態示意圖。 第，、圖a，係本發明之鑽尖為12〇度與頸部1〇度± 3度的◎ ^ 微小型鑽頭在孔位精度的實際鑽孔測試示意圖。 第〃、圖b，係傳統鑽尖為度與頸部（階梯狀）别度的 鑽頭在孔位精度的實際鑽孔測試的示意圖。 【主要元件符號說明】 習知 鑽頭30 頸部301 6 201043364 鑽頭40 頸部401 本發明 鑽頭10 刀刃部1 鑽尖11 切屑排出槽12 ❹柄部2 頸部21 頂部22 底面23 中心點231 中心線232 圓錐面24 印刷電路版20 〇 7201043364 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a drill bit, especially a micro drill bit of a printed circuit board. [Prior Art] It is known that the printed circuit board of the witness is drilled on the solder joint (copper foil) of the circuit after the circuit on the surface is completed, so that the conductive pin of the electronic component can be inserted into the solder. In the hole in the point. ° This chip removal problem is an extremely important issue when drilling a solder joint for a printed circuit board. In addition to the poor chip evacuation, the quality of the hole in the circuit board after drilling is poor, and the hole position accuracy may be poor due to residual dust, which may result in a decrease in the number of hole holes used. Since the drill bit drills the solder joints on the circuit board, the dust generated during the drilling process is concentrated and sucked away by the dust collecting device above the drilling machine, so that the drill holes are kept clean. However, the conventional drill bit 30, as shown in the first figure, has a stepped design of the neck 301 of the drill collar 30. When the drilled circuit board is drilled, the stepped intersection is caused to flow. The dust collecting device above the drilling machine cannot be sucked away in a concentrated manner, so that the effect of chip removal is reduced, resulting in poor hole position and poor quality in the hole. Another type of drill bit 40, as shown in the second figure, 'the neck of the drill bit 4〇1 has no stepped design, but because the angle of the conical surface is too large (above U degree), the flow field of the chip removal is not smooth, As a result, the dust collecting device above the drilling machine cannot concentrate the suction of the chips, resulting in a reduced chip removal effect, resulting in poor hole position and poor quality in the hole. 3 201043364 SUMMARY OF THE INVENTION The main object of the present invention is that the neck of the small drill bit does not adopt a stepped design, and:: two;::: micro = no flow phenomenon during the drilling process, so that the drilling machine Upper = suction, let _ fruit is good, hole = type drill includes the micro-cutting blade of the printed circuit board provided by the present invention ##上-drill tip and - chip discharge groove. In this figure, the tip of the 3H blade is 12 degrees; (4) 'The upper end has a conical neck, and the neck is provided with a top and a bottom, the top and the end of the blade Connected; /, the angle between the center line of the center point and the conical surface perpendicular to the center point of the bottom surface is 10 degrees ± 3 degrees. [Embodiment] The technical content and detailed description of the present invention will now be described with reference to the following drawings: The third embodiment is a schematic view of the appearance of the micro-sized drill of the present invention. In the figure f, the micro-miniature drill bit of the printed circuit board of the present invention is improved in structure, and the sinusoidal drill bit 10 includes: a blade portion 1 and a shank extending from the end of the blade portion 1. The knives 1 have a drill tip and all the chip discharge grooves 12 thereon. 5咖〜0. 05咖。 In the 曰 type and the cutting edge 1 of the drill tip 11 is 120 degrees, the diameter of the range of 〇. 5 faces ~ 0. 05 coffee. 201043364 The handle portion 2 has a conical neck portion 21 at the upper end thereof, and a top portion 22 and a bottom surface 23 are formed on the neck portion 21, and the top portion 22 is connected with the last knowledge of the blade portion 1 to form One drill bit is 1 inch. Referring to the fourth drawing, a partial enlarged view of the neck of the drill bit of the present invention is shown. As shown, the neck 21 has a cone 22 with a top portion 22 and a bottom surface 23. The angle (0) formed between the center line 232 of the top portion 22 and the center point 231 of the bottom surface 23 and the conical surface 24 is 1 degree ± 3 degrees (7 degrees to 13 degrees), but is 10 degrees. good.第五 凊 Refer to the fifth figure, which is a schematic diagram of the state of use of the present invention. As shown in the figure, when the micro-drill 1 of the present invention drills the printed circuit board 2 on the drilling machine, is the neck of the drill bit of the present invention? ! The angle of the blade is small, so that the dust collecting vacuum generated by the blade portion and the neck portion 21 and the printed circuit board 2 does not cause a turbulent flow (turbulent flow), so that the dust collecting device on the drilling machine can generate the drilling hole. The swarf is concentrated and the boring is kept clean to obtain a good value for the drill. ^ Refer to 苐, Figure 3 is the actual iron hole test of the micro-miniature drill bit with the tip of the drill tip of 1 degree and neck angle ± 3 degrees in the hole position accuracy and the traditional iron tip of the sixth figure b is 130 degrees Schematic diagram of the actual drilling test of the neck (stepped) 2 degree drill bit accuracy in the hole position. Both are under the same conditions (new needles of 0.3 face size, 3000 holes, 4 drills). After the bit test of Figure 6b, the hole position accuracy CpK is h 812, and the hole quality (thickness in the hole) is 0.45. After the drill test of the present invention, as shown in the sixth figure a, the hole position accuracy is 2.451, and the hole quality is 〇35. 5 201043364 After the quality of the hole in the hole is improved by the quality of the present invention, it is used to limit the uniformity of the present invention. Therefore, the accuracy of the angle reduction of the drill neck is increased from 1.812 to 2.451, which is increased by %%. . And 0.45 increased to a less rough 〇 35, and increased by 22%. The improved micro-head has a good wear performance in addition to the hole position accuracy and the inner hole. The description is only for the preferred embodiment of the invention and is not intended to limit the scope of the invention. That is, the scope, modification and modification of the patent application according to the invention are covered by the patent garden of the invention. [Simple description of the drawing] \S is a schematic diagram of the appearance of the drill bit used in the drilling of the first conventional printed circuit board. The first figure is a schematic view of the appearance of a bit used for drilling a second conventional printed circuit board. Figure 2 is a schematic view showing the appearance of the micro-sized drill of the present invention. The fourth figure is a partially enlarged schematic view of the neck of the drill bit of the present invention. The fifth diagram is a schematic diagram of the state of use of the present invention. First, Fig. a is a schematic diagram of the actual drilling test of the micro-drill bit in the hole position precision of the drill tip of the present invention of 12 degrees and the neck 1 degree ± 3 degrees. Dijon, Figure b, is a schematic diagram of the actual drilling test of the drill bit accuracy in the hole tip with the traditional drill tip and the neck (stepped). [Main component symbol description] Conventional drill bit 30 Neck 301 6 201043364 Drill bit 40 Neck 401 Drill bit 10 of the present invention Blade portion 1 Drill tip 11 Chip discharge groove 12 Crotch portion 2 Neck 21 Top 22 Bottom surface 23 Center point 231 Center line 232 Conical Surface 24 Printed Circuit Board 20 〇 7