201016354 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種鑽頭。 - 【先前技術】 一 P 刷電路板（printed circuit board, PCB)—般是 指用來安裝可設定電子系統電路之組件的多層基 φ 板。PCB板一般是由包含樹脂、玻璃纖維和銅箔層 在内的複合材料所製做而成。為了在PCB上安裝電 子組件，例如’ 1C、LSI等類似物，必須以專為PCB 設計的小錢子在PCB板上鑽出孔來。 每年，PCB板上所需孔的直徑愈來愈小。目前 大部分在PCB板上的鑽孔直徑都小於〇.4毫米。同 時’這些孔也變得愈來愈深，有些孔的深度甚至超 過鑽頭直徑的10倍。 在對PCB鑽孔時所必須考量的重要因數包括鑽 ❹ 頭的堅硬程度（rigidity)及碎片處理方式（chip disposal) ’藉此可決定出所鑽出來的鑽孔品質，例如 可決定出鑽孔的對準精確度及鑽孔的内壁杈链程 度。 現今，為了改善這些因素，可透過改善粟吸作 ' 用來強力排除碎屑’這是透過增加鐵孔時的螺旋角 度而由鑽子貫穿時的旋轉運動來達成。但是 以丄 <，增加 螺旋角度也會使一前端之切割邊變得太尖銳，因而 201016354 增加了鑽孔時出現碎屑的機率。此外，鑽頭的扭轉 堅硬度會降低’使得鑽頭容易碎裂。舉例來說，傳 統所用的螺旋角度一般在30。至35。間時，但今天較 小型的鑽頭的螺旋角度已在40°至45。間。201016354 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a drill bit. - [Prior Art] A printed circuit board (PCB) generally refers to a multi-layer base φ board used to mount components of an electronic system circuit. The PCB board is typically made of a composite material comprising a layer of resin, fiberglass and copper foil. In order to mount electronic components on the PCB, such as '1C, LSI, etc., holes must be drilled on the PCB board with a small amount of money designed for the PCB. Each year, the diameter of the required holes on the PCB is getting smaller and smaller. At present, most of the drill holes on the PCB board are smaller than 〇4 mm. At the same time, these holes have also become deeper and deeper, and some holes are even deeper than 10 times the diameter of the drill. The important factors that must be considered when drilling a PCB include the rigidity of the drill head and the chip disposal. This determines the quality of the drilled hole, for example, the diameter of the drill. Align the accuracy and the degree of the inner wall of the borehole. Nowadays, in order to improve these factors, it is possible to improve the millet suction 'to remove the debris strongly'. This is achieved by the rotational movement of the drill through the increase of the helix angle at the time of the iron hole. However, increasing the helix angle by 丄 < also makes the cutting edge of a front end too sharp, so 201016354 increases the chance of debris when drilling. In addition, the torsional stiffness of the drill bit is reduced to make the drill bit susceptible to chipping. For example, the spiral angle used in traditional practice is generally 30. To 35. At the same time, today's smaller drills have a helix angle of 40° to 45. between.
隨著螺旋角度增加’鑽孔時的流動式碎片也會 增加’並塞住且纏繞在流體後端，最終導致處理程 序受到阻礙’例如，阻塞碎片的排除不佳、鑽孔無 法精確對準及鑽頭損壞等。 第1圖為習知技術之鑽頭的侧面示意圖。第2 圖是第1圖之鑽頭前端的前視圖。 依據基材的性質，鑽頭具有一前端，其被磨製 成具有4面，且具有一介於約12〇。至13〇。間的 角Θ丨（參見第2圖）’和一介於約4〇。至时 A ^ 主45間的螺旋 且第2 第2圖中元件符號1代表一第—主翼 圖中元件符號2代表一第二主翼。As the helix angle increases, 'the flow debris during drilling will also increase' and plug and wrap around the back end of the fluid, eventually causing the process to be obstructed'. For example, poor removal of blocked debris, inaccurate drilling and Drill bit damage, etc. Figure 1 is a schematic side view of a conventional drill bit. Figure 2 is a front elevational view of the front end of the drill bit of Figure 1. Depending on the nature of the substrate, the drill bit has a front end that is ground to have four sides and has a thickness of about 12 inches. To 13 baht. The angle between the corners (see Figure 2) and one is between about 4 inches. At the time A ^ main 45 spiral and the second symbol in Fig. 2 represents a first main wing. The symbol 2 in the figure represents a second main wing.
【發明内容】 本發明提供一種鑽頭，其透過採用雙螺 來達成堅硬度與排除碎片的目的。 、月沒 本發明一態樣為一種鑽頭。依據本發 方式’此鑽頭包括一柄；和一主體，該方 與該柄耦接且該主體之一表面形成為—螺 到 邊，至於形成在該主體一遠側端之—. 刀口 衣面上的該螺 201016354 旋切割邊之一螺旋角度’則係小於形成在該主體一 中央部位之一表面上的該切割邊之一螺旋角度。 在此，形成在該主體一遠側端之一表面上的該 螺旋切割邊之該螺旋角度可大於或等於3〇。且小於 或等於40%形成在該主體一中央部位之一表面上的 該切割邊之該螺旋角度，可以比形成在該主體一遠 側端之一表面上的該螺旋切割邊之該螺旋角度大約 5。至 2〇〇。 【實施方式】 以下將參照附圖描述依據本發明製作之鑽頭的 實施方式。當參照附圖進行說明時，相同元件號碼 將用來#曰相同或相應的元件，並省略重複性說明。 β第3圖為依據本發明製作之鑽頭的侧視圖。第4 ::依據本發明實施方式製作之鑽頭的照片。第5SUMMARY OF THE INVENTION The present invention provides a drill bit that achieves rigidity and debris removal by using a double screw. Months Nothing The present invention is a drill bit. According to the present invention, the drill includes a handle, and a body coupled to the handle and one surface of the body is formed to be screwed to the side, and is formed at a distal end of the body. The spiral angle 'one of the spiral cut edges' is smaller than the spiral angle of the cut edge formed on one of the central portions of the main body. Here, the spiral angle of the spiral cut edge formed on one of the distal ends of the body may be greater than or equal to 3 〇. And the helix angle of the cutting edge formed on a surface of one of the central portions of the body may be less than or equal to 40% of the helix angle of the spiral cutting edge formed on one of the distal ends of the body. 5. To 2 〇〇. [Embodiment] An embodiment of a drill bit made in accordance with the present invention will be described below with reference to the accompanying drawings. When the description is made with reference to the drawings, the same component numbers will be used for the same or corresponding elements, and the repetitive description will be omitted. Figure 3 is a side view of a drill bit made in accordance with the present invention. 4: A photograph of a drill bit made in accordance with an embodiment of the present invention. number 5
:以一鑽頭磨製-基板的橫截面圖。在第3、4、5 圖中：示出的是鑽頭1〇、柄12、主體14、進入板 材30和備用板40 〇 鑽頭 1 n h 1 己括柄（參見第5圖之元件號碼12)和主 體140該柄12棋★祕 成或是耦接 ^構成鑽頭10的底部並與主體一起形 切割之材=至該主體14之一側上。用來磨製一將被 '的螺旋切割邊是形成在該主體14的表面 依據本發明 一實施方式所做成的鑽頭1 〇包括 柄 201016354 二2與主體14 ’其包括耗接至該柄i2之一側和形成 二螺旋切割邊的一表面…，由於被形成在主 之—遠端上該切割邊的螺旋角度（第3圖之心） 二形成在該主體一中央部位上的該切割邊之螺旋 =(第3圖之α2)，因此可改善鑽頭堅硬度及排除 =程度。此外，也可改善所磨製孔的品質，並 延長鑽頭10的使用壽命。 傳統的鑽頭具有一怪定的螺旋角度，本發明的 2 10採用兩種螺旋角度，《1與1，因此可改善 錄頭堅硬度及排除碎片的程度。結果，也可改善鐵 =對準精確度及鑽孔的内壁_程度，而且也可 $先防止因缠繞在鑽頭上之碎片所致㈣頭損壞情 較佳是讓角度L介於約30。至4〇。間，如 iLT銅：讓銘製進入板(第5圖中元件號碼 銅笛(第5圖中元件號碼3〇)出現像) I/:是由於碎片被纏繞在並阻塞於主體Η ^ 2相接處所造成的現象（第"）。在本實施方 式中’角度α,設定在38。。 將角度α2形成為比角度^大5。至2〇。左 為了能順利排除碎片，讓螺旋角度稍 。 =角比角度…2〇。以上，會因為螺;： 化成主體14的扭轉堅硬程度下降。 實施方式中，將角度心設定成45、 在本發明 6 201016354 同時，在對PCB鑽孔時，當角度等抓Μ ^ 45° 一般將主要面角度r(其形成在主體14的最外 面上）設定在10。至12。間。如上述，在本 橫斯 見方4 中，可透過讓鑽頭前端的螺旋角度介於3〇〇s ' 芝4〇0夕 間，而將主要面角度7設定為12°或更大，結果 ^ 將PVB材料和磨製特性（包括軟金屬）納入去β ’在 * , 号量德 可使切割邊的設定範圍變得更廣。因此，少 无’ 明: Grinding with a drill bit - a cross-sectional view of the substrate. In Figures 3, 4, and 5: shows the drill bit 1 〇, the shank 12, the main body 14, the entry plate 30, and the spare plate 40 〇 the drill bit 1 nh 1 has the shank (see component number 12 in Figure 5) and The main body 140 is stalked or coupled to form the bottom of the drill bit 10 and is cut with the main body to the side of the main body 14. A drill bit 1 for grinding a surface to be formed by a spiral cut edge formed on the surface of the body 14 according to an embodiment of the present invention includes a handle 201016354 2 and a body 14 'included to the handle i2 One of the sides and a surface forming the two spiral cutting edges, the cutting angle of the cutting edge formed on the main-distal end (the heart of FIG. 3) is formed on the central portion of the main body The spiral = (α2 of Fig. 3), so that the hardness and elimination degree of the drill bit can be improved. In addition, the quality of the ground hole can be improved and the life of the drill bit 10 can be extended. The conventional drill bit has a strange helix angle, and the 2 10 of the present invention employs two helix angles, "1 and 1," thereby improving the hardness of the recording head and eliminating the degree of debris. As a result, it is also possible to improve the iron=alignment accuracy and the inner wall_degree of the drilled hole, and also to prevent the damage caused by the debris wound on the drill bit. (4) The head damage is preferably made to have an angle L of about 30. To 4 〇. Between, such as iLT copper: let the inscription enter the board (the figure number of the copper flute in the figure 5 (the component number 3〇 in Fig. 5) appears) I/: because the debris is entangled and blocked in the main body Η ^ 2 phase The phenomenon caused by the connection (""). In the present embodiment, the angle α is set at 38. . The angle α2 is formed to be larger than the angle ^5. To 2 〇. Left In order to successfully remove the debris, let the spiral angle slightly. = angle than angle... 2〇. The above is due to the snail;: The degree of torsion of the main body 14 is reduced. In the embodiment, the angle of the heart is set to 45. In the present invention, 6 201016354, at the same time, when drilling the PCB, when the angle is equal to 45 45°, the main surface angle r (which is formed on the outermost surface of the main body 14) is generally used. Set at 10. To 12. between. As described above, in this Hengsisi square 4, the main surface angle 7 can be set to 12° or more by letting the helix angle of the front end of the drill be between 3〇〇s and 〇4〇0, and the result will be PVB materials and grinding characteristics (including soft metals) are included in the β' in *, and the amount of the cutting edge can be made wider. Therefore, there is little
. 丑'本I ❹ 實施方式中，將角度1r設定為12、 ％ 以下’將描述依據本發明一實施方式所 鑽頭結構。以下’並描述此鑽頭之效能評估、社作的 (1)如何執行評估測試 、、’》果。 執行依據本發明一實施方式所製作之鑽頭的評 估測試。實際的磨製條件提供如下。鑽孔過程揭示 在第5圖中。針對孔洞的對準精確度、孔内壁粗糙 度與毛邊高度―height)之測量來測試鑽頭的功 效’這些都是-般在PCB鑽孔領域中會測試的。 -鑽_頭直徑：Φ. 0.1 05 mm -CCL : 0.11，. Cu 7μιη/7μιη，5 叠 - 進入板：〇· It •備用板：1.5t -N · 3 00,000 rpm -F ： 3.9 m/min -敲擊次數：12,000次 在評估孔的對準精確度時，以A a 1 W自動式光學鹼側 7 201016354 儀器來測量基板背側上之鑽孔總數（依據預定敲擊 的次數）。在此，所測量到的數值是以離開一指定為 數值控制（numerical control，NC)物件座標之鑽孔的 數量來表示。由於鑽孔的對準精確度是預定敲擊數 - 目範圍内離開物件座標之鑽孔的最大值且一般形成 正常分佈’以「平均值+3 σ ( σ代表標準偏差）」做為 評估數據。 ^ • 透過電鍍銅至一含有鑽孔的基材上、切出並以 樹鹿模塑基板測量位置之一部分、及將所測量孔之 5 0%直徑拋光使得可清晰看見所測量孔之長度段等 方式，來評估孔内壁粗糙度及毛邊高度。孔内壁粗 梭度是利用測量孔内壁表面與粗糙度最高點之間的 距離來評估。毛邊高度也可利用測量基材上轉形的 銅箔層高度來評估（參見第7圖）。 (2)評估結果 孔的對準精確度的測量結果繪示於第8圖。在5 t 叠積層中，每次對銅疊（第i疊）、中央疊（第2疊）和 最下方疊（第5疊）敲擊200次，共3次，總數高達 12’00〇次敲擊，以測量鑽孔的對準精確度。接著， 測量結果顯示所測量的數值並未超過對基板敲擊 200次至12,〇〇〇次之預定標準（27μιη〜35μιη)。 孔内壁的整體形狀及孔内壁粗糙度的測量結果 分別示於第9及10圖。分別對基板執行敲擊共4〇〇〇 •人及1 2 0 〇 〇次。類似上述測量鑽孔之對準精確度一 201016354 樣，5基板，並分別量測最上方叠（第}疊）、中央疊 (第2疊）和最下方疊（第5疊y，測量結果顯示對基板 敲擊4000次及12000次的測量數值並未超出預定標 準（8 μιη~ 1 Ομιη)。 ， 毛邊的形狀及毛邊高度的測量結果分別示於第 11及12圖。分別對基板執行敲擊共4000次及12000 次。在5疊中，只挑選會出現最多毛邊的最上方疊（第 • 1疊）。敲擊4〇〇〇次之基板的測量數值顯示其並未超 出預定標準（5μιη)，但是敲擊12000次之基板的測量 數值顯示其嚴重超出預定標準。 從測試結果可知，在對敲擊i 2〇〇〇次之基板測 量鑽孔之對準精確度與孔内壁粗糙度時，以本發明 鑽頭進行鑽孔，可獲得令人滿意的結果。但是，由 於在毛邊高度的測量上，結果超出預設標準，因此 鑽頭之適當敲擊次數應限定在8〇〇〇次到loooo次 間’此對習知鑽頭（敲擊次數4000次）的磨製性改善 • 程度已可達ioo%至150%，且此改善是歸功於提高 鑽頭堅硬度、螺旋角度可變和改善碎片排除三者的 貢獻。 此外’也不會出現因碎片阻塞或纏繞在鑽頭上 造成鑽頭潠壞的情況。以今日工匠習用的顯微工具 觀察本發明之鑽頭，也不曾發現有碎片阻塞或纏繞 在鑽頭上。 雖然已參照特定實施例詳細敘述本發明精神， 201016354 然而該等實施例僅是用於說明本發明，而北… 阳非限制本 發明。須了解熟悉此技術者可在不偏離本發8月範^ 及精神的情況下變化或修改該實施例。 圍 - 【圖式簡單說明】 第1圖為習知技術之鑽頭的側面示意圖. 第2圖是第1圖之鑽頭前端的前視_ ; φ 第3圖為依據本發明製作之鑽頭的侧視圖. 第4圖是依據本發明實施方式製作之雄 1卜之鑽頭的照 片； 、、 第5圖是以一鑽頭磨製一基板的橫截面圖； 第6圖為一鳥巢情況的照片； 第7圖是示出如何評估一磨製鑽孔的照片； 第8圖是一鑽孔對準精確度之測量結果的照片; 第9圖是一鑽孔内壁整體形狀的照片； 第1 〇圖是一鑽孔内壁糙度之測量結果的照片； # 第11圖是一毛邊形狀的照片； 第12圖是一毛邊高度之測量結果的照片。 【主要元件符號說明】 10 鑽頭 12 柄 14 主體 20 進入 板 30 基材 40 備用 板 10In the embodiment of the present invention, the angle 1r is set to 12 or less. The structure of the drill according to an embodiment of the present invention will be described. The following 'describes the effectiveness evaluation of this drill bit, and how it performs (1) how to perform the evaluation test, '. An evaluation test of a drill bit made in accordance with an embodiment of the present invention is performed. The actual grinding conditions are provided below. The drilling process is revealed in Figure 5. Test the effectiveness of the drill for the accuracy of the hole alignment, the roughness of the inner wall of the hole and the height of the burr's height. These are all tested in the field of PCB drilling. -Drill_Head diameter: Φ. 0.1 05 mm -CCL : 0.11,. Cu 7μιη/7μιη, 5 stacks - Entry plate: 〇· It • Spare plate: 1.5t -N · 3 00,000 rpm -F : 3.9 m/min - Number of taps: 12,000 times When evaluating the alignment accuracy of the holes, the total number of holes on the back side of the substrate (according to the number of predetermined taps) was measured with an A a 1 W automatic optical alkali side 7 201016354 instrument. Here, the measured value is expressed as the number of holes leaving a coordinate of a numerical control (NC) object. Since the alignment accuracy of the drill hole is the predetermined number of strokes - the maximum value of the hole leaving the object coordinates within the mesh range and generally forms a normal distribution 'with the average value +3 σ ( σ represents the standard deviation) as the evaluation data . ^ • Polishing copper to a substrate containing drilled holes, cutting out and measuring one part of the substrate with the tree deer, and polishing the 50% diameter of the measured hole so that the length of the measured hole can be clearly seen Etc., to evaluate the inner wall roughness and the height of the burr. The rough inner wall of the hole is evaluated by measuring the distance between the inner wall surface of the hole and the highest point of roughness. The height of the burrs can also be assessed by measuring the height of the deformed copper foil layer on the substrate (see Figure 7). (2) Evaluation results The measurement results of the alignment accuracy of the holes are shown in Fig. 8. In the 5 t stacked layer, each time the copper stack (i-th stack), the center stack (2nd stack), and the lowermost stack (5th stack) are struck 200 times for a total of 3 times, the total number is up to 12'00 times. Tap to measure the alignment accuracy of the hole. Next, the measurement results showed that the measured value did not exceed 200 to 12 for the substrate, and the predetermined standard (27 μm to 35 μm). The measurement results of the overall shape of the inner wall of the hole and the roughness of the inner wall of the hole are shown in Figs. 9 and 10, respectively. Perform a tap on the substrate for a total of 4 〇〇〇 • person and 1 2 0 〇 〇. Similar to the above-mentioned measurement of the drilling accuracy of the 201016354 sample, 5 substrates, and measuring the top stack (the stack), the center stack (the second stack) and the bottom stack (the fifth stack y, the measurement results show The measured values of the substrate tapping 4000 times and 12000 times did not exceed the predetermined standard (8 μιη~ 1 Ομιη). The measurement results of the shape of the flash and the height of the flash were shown in Figures 11 and 12, respectively. A total of 4,000 times and 12,000 times. In the 5 stacks, only the top stack (the 1st stack) with the largest number of burrs was selected. The measured value of the substrate hit 4 times showed that it did not exceed the predetermined standard (5μιη) ), but the measured value of the substrate hitting 12000 times shows that it is seriously exceeding the predetermined standard. From the test results, it is known that the accuracy of the alignment of the drill hole and the roughness of the inner wall of the hole are measured when the substrate is struck by i 2 times. Drilling with the drill bit of the present invention can obtain satisfactory results. However, since the result of the measurement of the height of the burr exceeds the preset standard, the appropriate number of strokes of the drill should be limited to 8 times to loooo. Second time This improved grindingability of conventional drills (4000 strokes) has reached ioo% to 150%, and this improvement is attributed to improved bit hardness, variable helix angle and improved debris removal. Contribute. In addition, there is no case where the bit is broken due to blockage or entanglement on the drill bit. The drill bit of the present invention was observed with a microtool used by today's craftsmen, and no debris was found to be clogged or wound around the drill bit. The spirit of the present invention has been described in detail with reference to the specific embodiments thereof, and the present invention is only for the purpose of illustrating the present invention, and the invention is not limited to the present invention. The embodiment is changed or modified in the case of a spirit. Circumference - [Simplified description of the drawings] Fig. 1 is a side view of a drill bit of the prior art. Fig. 2 is a front view of the front end of the drill bit of Fig. 1; 3 is a side view of a drill bit made in accordance with the present invention. FIG. 4 is a photograph of a drill bit made of a male body according to an embodiment of the present invention; and FIG. 5 is a cross section of a substrate milled by a drill bit. Figure 6 is a photograph of a bird's nest; Figure 7 is a photograph showing how to evaluate a ground hole; Figure 8 is a photograph of a hole alignment accuracy measurement; Figure 9 is a drill Photograph of the overall shape of the inner wall of the hole; Figure 1 is a photograph of the measurement of the roughness of the inner wall of the borehole; #图11 is a photograph of a burr shape; and Fig. 12 is a photograph of the measurement result of the height of the burr. Component Symbol Description 10 Drill 12 Handle 14 Body 20 Entry Plate 30 Substrate 40 Spare Board 10