M422444 五、新型說明： 【新型所屬之技術領域】 本創作係涉及一種用於印刷電路基板的鑽頭，尤指一 種雙刃合流溝鑽頭。 【先前技術】 印刷電路基板一般是由薄片與銅箔堆疊所構成，而該 薄片則疋由紙或破璃纖維浸潰;絕緣性樹脂而成。要在該印 刷電路基板上安裝各式元件時，往往需要進行鑽孔加工， 此時使用的工具即為鑽頭。 -般來說’為了降低成本，會將複數印刷電路基板相 互堆疊後，再-起進行加工。而現有之常用的鑽頭有以下 兩種： 其一，現有技術之雙刀鑽頭，請參_ 4及圖5所示， 其具有一頭部81、一頸部82及兩排屑溝83,頭部81具有 兩個主刀刃81 1，兩主刀刀81彳 王神对％设置，頸部82連 接頭部81 ’頸部82外徑小於頭㈣，以提供空間_ 後回復的孔洞壁面；兩排屑溝83成型於頭部Μ 地延伸至頸部82 ; ” 而現有技術之雙刃鑽頭有以下兩缺點 頭頸部82的外徑較小’加上設有兩排 = 小，導致剛性相對不足’進而在多層基板加工時容:折斷積 第二，鑽頭切削時產生的過多埶 w β …、 會使屑料融化並黏著 在排屑溝83,並導致屬料排不出去 者 最後造成鑽頭斷裂。 降低切削效果， 3 M422444 其二’現有技術之單刃鑽頭’請參閱圖6及圖7所示， 其具有一頭部91、一頸部92·、三前排屑溝93及一頸排屑 溝94，頭部91具有一個主刀刃911，頸部g2連接頭部g ; —刚排屑溝93螺旋狀地成型於頭部91 ;頸排屑溝94螺旋 狀地成型於頸部92，且與各前排屑溝93不相通。 然而，現有技術之單刀鑽'頭同樣具有兩缺點：第一， 由於頭部91僅具有單一主刀刃911，因此使用過程中容易 因爻力不均而偏擺，進而導致鑽出的孔位不佳，此外，因 為僅有單一主刀刃91彳，所以切削時磨耗加重，造成孔壁品 質不良，第二，雖然現有技術之單刃鑽頭藉由在頸部92僅 〇又置單排屑溝94以増加其戴面積及剛性，但是除了同樣 有屑料融化在排屑溝94上的問題外，更由於頭部91及頸 部92上的排屑溝93、94不相通，而使排屑效果更為惡化。 【新型内容】 有鑑於前述現有鑽頭其易折斷、孔位不佳及排屑效果 不良的缺點及不足，本創作提供一種雙刀合流溝鑽頭，其 可有效克服上述缺點》 、 為達到上述的創作目的，本創作所採用的技術手段為 設計一種雙刃合流溝鑽頭，其中包含： 一頭部’其具有兩個主刀刃’主W刃呈轴對稱設置； 一頸部，其連接頭部； 兩排屑溝，其成型於頭部並延伸至頸部，且皆呈螺 狀，兩排屑溝於頸部上合流，合流前兩排屑溝之螺 同’合流後兩排屑溝的螺旋角相同；兩排屑溝呈—深_淺不。 本創作之優點在於，藉由使頭部設有兩對稱設置的主° M422444 刀刀，以可平衡受力，進而不容易偏擺並可獲得準確的孔 位；藉由設置雙主刀刃，以可平均分擔刀刃的磨耗，進而 提升孔壁的品質；藉由將其中一排屑溝設計為淺溝，以可 提升截面積及剛性，進而使之不易折斷；最後，藉由使兩 排屑溝合流，並且兩排屑溝的深度及角度皆不同，以達到 擾流的效果’使兩排屑溝的屑料互相推擠，進而避免屑料 附著固疋在排屑溝。本創作藉此達到孔位準確、提升孔壁 品質、不易折斷及排屑效果良好的目的。 進一步而言，所述之雙刀合流溝鑽頭，其中兩排屑溝 的先端螺旋角度介於42至50度之間。 、進一步而言，所述之雙刃合流溝鑽頭，其中兩排屑溝合 流之位置，位於自頭部的端部算起〇2至彳8mm之間。 【實施方式】 以下配合圖示及本創作之較佳實施例，進一步闡述 創作為達成預定創作目的所採取的技術手段。 晴參閱圖1所示，木創作夕雔的人^_ # 尽釗作之雙刀合流溝鑽頭包含有 頭部1〇、一頸部2〇、 网排肩溝31 ' 32及一柄部40。 請參閱圖2及圖3所干，& γ _ 〇所不，則述之碩部彳〇具有兩個主M422444 V. New description: [New technical field] This paper relates to a drill bit for printed circuit boards, especially a double-blade flow groove drill bit. [Prior Art] A printed circuit board is generally composed of a stack of sheets and copper foil, and the sheet is impregnated with paper or glass fibers; an insulating resin. When various types of components are mounted on the printed circuit board, drilling is often required, and the tool used at this time is a drill. In general, in order to reduce costs, a plurality of printed circuit boards are stacked one on another, and then processed. The conventional commonly used drill bit has the following two types: First, the prior art double-knife drill bit, as shown in FIG. 4 and FIG. 5, has a head 81, a neck portion 82 and two rows of chip grooves 83, the head The portion 81 has two main cutting edges 81 1, two main cutting tools 81, the king is set to %, the neck 82 is connected to the head 81 'the outer diameter of the neck 82 is smaller than the head (four) to provide space _ the rear wall of the hole; two rows The dimples 83 are formed in the head to extend to the neck 82; and the prior art double-edged drill has the following two disadvantages: the outer diameter of the head and neck 82 is small 'plus two rows = small, resulting in relatively insufficient rigidity' Further, in the processing of the multi-layer substrate, the second product is broken, and the excessive 埶w β ... generated during the cutting of the drill bit causes the chip to melt and adhere to the chip ditch 83, and causes the material to be discharged without causing the bit to break. Reduce the cutting effect, 3 M422444 The second 'prior art single-edge drill bit', please refer to Figure 6 and Figure 7, which has a head 91, a neck 92 ·, three front chip ditch 93 and a neck chip Groove 94, head 91 has a main cutting edge 911, neck g2 is connected to head g; - just flutes 93 spiral Formed on the head 91; the neck flutes 94 are helically formed on the neck 92 and are not in communication with the front flutes 93. However, the prior art single-blade 'heads also have two disadvantages: first, due to the head The portion 91 has only a single main cutting edge 911, so that it is easy to yaw due to uneven force during use, which leads to poor hole drilling. In addition, since only a single main cutting edge 91彳, the wear is aggravated during cutting. The hole wall quality is poor. Secondly, although the prior art single-blade drill bit only has a single chip discharge groove 94 in the neck portion 92 to increase the wearing area and rigidity, but in addition to the same material, the chip melts in the chip ditch. In addition to the problem of 94, the chip removal grooves 93, 94 on the head 91 and the neck 92 are not connected, and the chip removal effect is further deteriorated. [New content] In view of the above-mentioned prior drill bit, it is easy to break and the hole position The disadvantages and shortcomings of poor handling and poor chip removal effect, the present invention provides a double-knife combined flow groove drill bit, which can effectively overcome the above shortcomings. In order to achieve the above-mentioned creative purposes, the technical means adopted in this creation is to design a double-edged flow. Ditch bit The method comprises: a head having 'two main blades' and a main W blade arranged in an axisymmetric manner; a neck connecting the head; and two rows of chips formed on the head and extending to the neck, both of which are Spiral, two rows of ditch on the neck merge, the snails of the two rows of ditch before the confluence are the same as the helix angle of the two rows of ditch after the confluence; the two rows of ditch are deep- _ shallow. The advantage of this creation is that By providing the head with two symmetrically placed main M422444 cutters, the force can be balanced, so that it is not easy to yaw and obtain accurate hole position; by setting the double main cutting edge, the blade can be evenly distributed. Wear, and thus improve the quality of the hole wall; by designing one of the drainage grooves as a shallow groove, the cross-sectional area and rigidity can be improved, thereby making it difficult to break; finally, by combining the two discharge grooves, and two rows The depth and angle of the ditch are different to achieve the effect of the spoiler', so that the scraps of the two flutes are pushed against each other, thereby preventing the coamage from adhering to the flute. This creation aims to achieve accurate hole position, improve the quality of the hole wall, is not easy to break, and has good chip removal effect. Further, in the double-knife combined groove drill bit, the tip end spiral angle of the two chip grooves is between 42 and 50 degrees. Further, in the double-edged flow path drill bit, the position where the two discharge grooves are merged is located between 〇2 and 彳8 mm from the end of the head. [Embodiment] The following is a description of the preferred embodiment of the present invention, and further illustrates the technical means by which the creation is made for the purpose of achieving the intended creation. Clearly, as shown in Figure 1, the person who created the wood ^ ^ ^_ # 钊 之 双 双 双 双 包含 包含 包含 包含 包含 包含 包含 包含 包含 包含 包含 包含 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头 钻头. Please refer to Figure 2 and Figure 3, & γ _ 〇 no, then the master has two main
刀11及兩個副刀刃12,π 11 I 王刀刃11與副刀刀12相互交錯 呈軸對稱設置。 乂 @- 前述之頸部20連接頭部 前述之兩排屑溝31、π 士、_ οη 32成型於頭部10並延伸至 20’且皆呈螺旋狀； 申至 人一 1 以於頸部20上合 合k刖兩排屑溝31、32夕嫂# & τ 以之螺旋角不同，呈一 後兩排屑溝31、32的蟫 一小， 的螺友角相同，兩排屑肖31、32 M422444 端螺旋角度皆介於42至50度之間；兩排屑溝31、32合流 之位置，位於自頭部10的端部算起〇.2至]8mm之間:: 排屑溝31、32呈一深一淺。 請參閱圖1所示，前述之柄部40連接頸部2〇之末端。 請參閱圖2及圖3所示，本創作藉由使頭部1〇的主刀 刀11及副刀刀12為軸對稱寧計，以可平衡頭部1〇的受 力’進而使頭部10不易偏擺並使鑽出的孔位更為準確。萨 由使用雙主刀刃彳1，以可平均分擔刀刃的磨耗，進而提^ 孔壁的品質。藉由將兩排屑溝31、32設計為一深一淺，以 相對現有之雙刀鑽頭設計成相同深度之兩排屑溝，而更能 增加截面積，進而提升剛性，使之不易折斷β最後，藉^ 使兩排屑溝31、32合流，並且兩排屑溝31、32的深度及 角度皆不同，以達到擾流的效果，當淺溝中的屑料從^同 角度及高度於合流處推擠深溝的屑料，可有效推動屑料並 避免屑料附著固^在排屑溝31、32,進而使屑料的排出更 為順利《本創作藉此達到孔位準確 '提升孔壁品質、不易 折斷及排屑效果良好的目的。 / 此外，本創作之鑽頭使用硬質合金製作，除具有較強 的耐磨性’更可多次研磨以重複使用。 以上所述僅是本創作的較佳實施例而已，並非對本創 作做任何形式上的限制’雖然,本創作已以較佳實施例揭露 如上，然而並非用以限定本創作，任何所屬技術領域中具 有通常知識者，在不脫離本創作技術方案的範圍内，當 利用上述揭示的技術内容作出些許更動或修飾為等同變化 的等效貫她例，但凡是未脫離，本創作技術方案的内容，依 =本創作的技術實f對以上實施例所作的任何簡翠修改 问變化與修飾，均仍屬於本創作技術方案的範圍内。 【圖式簡單說明】 圖1係本創作之示意圖。. 圖2係本創作之側視示意圖。 圖3係本創作之端視示意圖。The knives 11 and the two sub-blades 12, π 11 I, the king-blade 11 and the sub-knife 12 are interdigitated in an axisymmetric manner.乂@- The aforementioned neck 20 is connected to the head. The two rows of chips 31, π, _ οη 32 are formed on the head 10 and extend to 20' and are spiraled; 20 on the combination of k 刖 two rows of ditch 31, 32 嫂 嫂 # & τ with different helix angles, showing a rear two rows of ditch 31, 32 of a small, the same friend angle, two rows of shavings 31, 32 M422444 end helix angles are between 42 and 50 degrees; the position of the two rows of chips 31, 32 merged, from the end of the head 10 between 〇.2 to 8mm:: chip removal The grooves 31, 32 are shallow and shallow. Referring to FIG. 1, the aforementioned handle 40 is connected to the end of the neck portion 2〇. Referring to FIG. 2 and FIG. 3, the present invention makes the head 10 and the sub-blade 12 of the head 1 axis axisymmetric, so as to balance the force of the head 1 进而 and then the head 10 It is not easy to yaw and make the drilled holes more accurate. Sa uses the double main blade 彳1 to evenly share the wear of the blade and improve the quality of the hole wall. By designing the two rows of chips 31, 32 as one deep and shallow, the two double-drill bits are designed to have two rows of ditch at the same depth, and the cross-sectional area can be increased, thereby increasing the rigidity and making it difficult to break. Finally, by means of ^, the two discharge grooves 31, 32 merge, and the depth and angle of the two discharge grooves 31, 32 are different to achieve the effect of spoiler, when the debris in the shallow groove is from the same angle and height Pushing the deep groove of the confluence at the confluence can effectively push the scraps and prevent the scraps from adhering to the flutes 31 and 32, thereby making the discharge of the scraps smoother. The purpose of wall quality, not easy to break and good chip removal effect. / In addition, the drill of this creation is made of cemented carbide, in addition to its strong wear resistance, and it can be repeatedly ground for repeated use. The above description is only a preferred embodiment of the present invention, and does not impose any form limitation on the present invention. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to limit the present invention, and any technical field is Those who have ordinary knowledge, within the scope of the technical solution of the present invention, when using the technical content disclosed above to make some changes or modifications to the equivalent of the equivalent, but the content of the creative technical solution, According to the technical practice of the present invention, any changes and modifications made to the above embodiments are still within the scope of the technical solution of the present invention. [Simple description of the diagram] Figure 1 is a schematic diagram of the creation. Figure 2 is a side view of the creation. Figure 3 is a schematic end view of the creation.
圖4係現有技術之雙刀鑽頭之側視示意圖。 圖5係現有技術之雙刀鑽頭之端視示意圖。 圖6係現有技術之單刃鑽碩之側視示意圖。 圖7係現有技術之單刃鑽頭之端視示意圖。 【主要元件符號說明】Figure 4 is a side elevational view of a prior art double cutter bit. Figure 5 is a schematic end view of a prior art double cutter bit. Figure 6 is a side elevational view of a prior art single-edged drill. Figure 7 is a schematic end view of a prior art single-edged drill bit. [Main component symbol description]
1Q頭部 1 2副刀刃 31排屑溝 4Q柄部 81頭部 82頸部 91頭部 92頸部 94頸排屑溝 11主刀刃 20頸部 32排屑溝 811主刀刃 83排屑溝 91 1主刀刃 93前排屑溝 71Q head 1 2 sub-blade 31 chip ditch 4Q shank 81 head 82 neck 91 head 92 neck 94 neck flute ditch 11 main blade 20 neck 32 chip ditch 811 main blade 83 chip ditch 91 1 Main blade 93 front chip groove 7