五、新型說明： 【新型所屬之技術領域】 本創作係有關一種鑽針結構，特別是一種對切屑排出溝 進行重複切溝之鑽針結構。 / 【先前技術】 在目前市場對印刷電路板的高品質、高需求量和快速供應 的競爭下，要求鑽頭達到高精度、高進給速率、良好的孔壁 品質及作業中不折斷的加工條件，已是普遍的期望和需求； 隨著印刷電路板之電子線路高密度與高精度的線細化發展， 其鑽孔加工已大量使用超小直徑的鑽頭，且為了提升作業效 率和降低製造成本，對於在印刷電路板上的貫穿孔鑽鑿加 工，乃是採複數片重疊印刷電路板進行貫穿孔鑽鑿加工，因 此需使用越長之鑽頭，且_需具有足夠㈣度和快速 屑功能。 傳統一種鑽針結構中，為了獲得較佳之切削性，其鑽蕊採 由鑽尖向後斜㈣—種正錐設計方式，此觀針因蕊厚二漸 漸變大，使得鑽針後段容屑空間逐漸減少，因此一般係使鑽 .針前端的切肩排出溝螺旋角度較小，而鑽針後端的切屬排出 溝螺旋角度較大，以藉由後段切屑排出溝螺旋角度大、切削 距離，及容間的增加，解決鑽針後段容Μ間較前端少 的問題，然而此種較大切屑排出溝螺旋角度的設計易發生嚴 重尾段捲屑問題，導致鑽針加工品質不良與斷針問題。 由於鑽針之切屑排出溝的螺旋角度會影響鑽針的容屑空 =與排屑，力，角度越大容屑空間越大，所以傳統另有一種切 ㈣出溝的螺旋角度前端大後端小的結構’藉以增加鑽針前 ，的容間1而此種後端螺旋角度變小的 題。 屋生易導致鑽針加工品質不良與斷針問 上述切4排出溝無論是螺旋角度前端小後端大、或螺旋角 又别端大後端小的設計’均會有鑽針容屑空間大小與實際使 用需求不符的問題，且皆會對加工產生不良之影響。 【新型内容】 、為了解決上述問題，本創作目的之一係提供-種具有重 複切溝之鑽針結構，藉由切屑排出溝重複切溝的方心、依 需求靈活調整切㈣出溝之整體溝型與角度，在提升容屑空 間及排屬力的同時，又可以靈活控制鑽針的剛性度 = 良好的精度表現。 又違到 為了達到上述目的，本創作一實施例之具有重 鑽針結構，包含··-鑽柄部；以及—鑽刃部連接鑽柄部，，鑽 刃部由一鑽尖端螺旋設置至少一第一切屑排出溝，其人 -第-螺旋傾角，第-切屑排出溝内切設有—第二切屑= 溝，第二切屑排出溝包含一第二螺旋傾角，且部分第二切 排出溝之第二螺旋傾角係與第一螺旋傾角相異。 刀“ 【實施方式】 圖1所示為本創作一實施例具有重複切溝之鑽針結構之 觀平面示意圖，如圖所示，具有重複切溝之鑽針結構勹人 一鑽柄部12及一鑽刃部14連接鑽柄部12,鑽刀部14由== 端向後斜向研磨一切削刃16 ’且切削刃16順鑽刃部14 = 身向後延伸懸繞以形成橫刃18及一第一切屑排出溝=杯 M427221 橫刃18間，且第一切屑排出溝2〇具有一第一螺旋傾角㊀卜 其中於第一切屑排出溝20内切設有一第二切屑排出溝22，第 二切>1排出溝22具有-第二螺旋傾角e2，且第_螺旋傾角01 與第二螺旋傾角θ2可為部分相同及部分相異的關係。V. New description: [New technical field] This creation is about a boring needle structure, especially a burr structure for repeated grooving of the chip discharge groove. / [Prior Art] In the current market competition for high quality, high demand and fast supply of printed circuit boards, the drill requires high precision, high feed rate, good hole wall quality and unbroken machining conditions during operation. It is a common expectation and demand; With the development of high-density and high-precision wire refinement of printed circuit boards, the drilling process has used a large number of ultra-small diameter drill bits, and in order to improve work efficiency and reduce manufacturing costs. For the through hole drilling process on the printed circuit board, it is to use several overlapping printed circuit boards for through hole drilling, so the longer the drill bit is to be used, and the need to have enough (four degrees) and fast chip function. In the traditional boring needle structure, in order to obtain better machinability, the core of the drill is taken from the drill tip backwards (four)-a kind of positive cone design mode, and the needle is gradually enlarged due to the thickness of the core, so that the chip space of the rear part of the bur is gradually gradually increased. The reduction is generally made so that the cutting angle of the cutting shoulder of the drill needle is smaller, and the cutting angle of the cutting groove at the rear end of the drilling needle is larger, so that the spiral angle of the cutting groove of the rear section is large, the cutting distance, and the capacity The increase between the two sides solves the problem that there is less front end between the burrs and the smaller end of the burr. However, the design of the spiral angle of the larger swarf discharge spurs is prone to serious tail swarf problems, resulting in poor quality and broken needles. Because the spiral angle of the chip discharge groove of the drill pin will affect the chip blank of the drill pin = and the chip removal, the force, the larger the angle, the larger the chip space, so there is another type of cutting (four) groove spiral angle front end large rear end The small structure 'in order to increase the capacity of the front hole 1 and the rear end spiral angle becomes smaller. The house is easy to lead to poor quality of the burring processing and the broken needle. The above-mentioned cut 4 discharge groove is either a small angle at the front end of the spiral angle, or a small design with a helix angle and a small end. Problems that do not match the actual usage requirements, and all have adverse effects on processing. [New content] In order to solve the above problems, one of the purposes of this creation is to provide a boring needle structure with repeated grooving, by repeating the center of the grooving by the chip discharge groove, and flexibly adjusting the cutting according to the demand (4) The groove shape and angle can flexibly control the rigidity of the drill pin while improving the chip space and the row force = good precision performance. In addition, in order to achieve the above object, an embodiment of the present invention has a heavy-drilling needle structure, comprising: a drill handle portion; and a drill blade portion connecting the drill handle portion, wherein the drill edge portion is provided by at least one drill tip spiral The first chip discharge groove, the human-first-spiral inclination angle, the first-chip discharge groove is cut--the second chip = groove, the second chip discharge groove includes a second spiral inclination angle, and a part of the second cutting discharge groove The second helix angle is different from the first helix angle. [Embodiment] FIG. 1 is a schematic plan view showing a structure of a drill having a repeated grooving according to an embodiment of the present invention, as shown in the figure, a burr structure having a repeating grooving structure and a shank portion 12 and A drill blade portion 14 is coupled to the shank portion 12, and the drill portion 14 is obliquely rearwardly milled by a == end to a cutting edge 16' and the cutting edge 16 is slidably extended rearwardly to form a chisel edge 18 and a The first chip discharge groove=the cup M427221 is the transverse blade 18, and the first chip discharge groove 2〇 has a first spiral inclination angle. A second chip discharge groove 22 is cut in the first chip discharge groove 20. The second cut > 1 discharge groove 22 has a second spiral inclination angle e2, and the first spiral angle of inclination 01 and the second spiral angle of inclination θ2 may be partially identical and partially different.
在如圖1所示之具有重複切溝之鑽針結構中，以第—切屑 排出溝20之第-螺旋傾角01❹度為整段相同，而第二螺 旋傾角Θ2的角度為多段式為例，請參閱圖j，將鑽刀部μ由 鑽尖端往鑽柄部12方向依序劃分為苐一區段24、第二區段 26及第三區段28’其中第一區段24及第三區段μ之 = 屬排出溝22的第二螺旋傾角θ2與第一切屑排出溝如的^ 一 =旋傾角Μ -致，因此並不致影響第—切肩排出溝2〇的溝 盘第二切屬排出溝22的第二螺旋傾角θ2 :、第切4排出溝2GP螺旋傾角Θ1相異，使得 -切屑排出溝22的第-切屑排出溝2G之溝型與角度產 變，如此以增加鑽針結構1〇之容屑空間與排屑力。又In the burr structure having the repeated grooving as shown in FIG. 1 , the first spiral angle 01 of the first chip discharge groove 20 is the same as the whole segment, and the angle of the second spiral inclination Θ 2 is a multi-stage. Referring to FIG. j, the drill portion μ is sequentially divided by the drill tip toward the shank portion 12 into a first section 24, a second section 26, and a third section 28', wherein the first section 24 and the third section The section μ= is the second spiral inclination angle θ2 of the discharge groove 22 and the first chip discharge groove such as the = rotation angle Μ, so that the second groove groove 2 of the first cutting shoulder discharge groove 2 is not affected. The second spiral inclination angle θ2 of the cutting discharge groove 22 is different from the first cutting discharge groove 2GP spiral inclination angle ,1, so that the groove type and the angle generation of the first chip discharge groove 2G of the chip discharge groove 22 are increased. Needle structure 1 容 chip space and chip removal force. also
1本創作中，弟二切屑排出溝22之第二螺旋傾角扣 度變，不限於上述三段式設計，其可為多段式設計，且 於固定角度與固^區段數，又第—切屬排出溝2()的第（ 傾角Θ2的角度範圍亦不限於固定—種的；另—方面上述 ，針結構H)似單-切削们6且延伸單條第__ 為例，不限於此’本創作之重複切溝的設計亦可應用於f t對条第一切肩排出溝20的鑽針結構;〇 溝22亦係為雙條，且分別設置於每- 第=屬排出溝20内；亦即本創作之鑽針結構ι〇在設 可依據需求選擇單第一切届姑φ、婆。λ 卞上 22，#⑽二 溝〇或對稱雙切屬排出溝 s Y ;弟一切屑排出溝20内進行重複切溝（即切設第二 切屬排出溝）’以便藉由第—切屑排出溝.2Q重複切溝的^ 根據需求靈活調整整體溝型與角度，以達到增加容屑空心及 5 M427221 排屑力之目的，並可同時依據需求調整鑽 尾端嚴重捲屑等不良問題。 综合上述’在本創作中，採用重複切溝的方式可在任意位 置調整切屑排出溝的角度與形狀，使得鑽針具有容屑空間及 排屬力增加並可靈活調整剛性強度的優點。 以上所述之實施例僅係為說明本創作之技術思想及特 ’、目的在使熟習此項技藝之人士能夠瞭解本創作之内容 並據以實施，當不能以之限定本創作之專利範圍，即大凡依1 In this creation, the second spiral inclination angle of the second chip discharge groove 22 is not limited to the above three-stage design, which can be a multi-stage design, and the number of fixed angles and solid sections, and the first-cut The angle of the discharge groove 2 () (the angle range of the inclination angle Θ 2 is not limited to the fixed type; the other side, the needle structure H) is similar to the single-cutting 6 and the extension of the single __ is not limited thereto. The design of the repeated grooving of the present invention can also be applied to the bur structure of the first tangential shoulder discharge groove 20 of the ft; the sulcus 22 is also double strips, and is respectively disposed in each of the genus discharge grooves 20; That is to say, the design of the burr structure of this creation can be selected according to the demand. λ 卞上22,#(10) 二沟〇 or symmetrical double-cutting discharge s Y; the entire swarf discharge groove 20 is subjected to repeated grooving (ie, cutting the second cut venting groove) to be discharged by the first chip Ditch. 2Q Repeated grooving ^ Flexible adjustment of the overall groove shape and angle according to the demand, in order to increase the chip hollow and 5 M427221 chipping force, and at the same time adjust the serious problems such as chipping at the end of the drill. In view of the above, in the present invention, the angle and shape of the chip discharge groove can be adjusted at any position by means of repeated grooving, so that the burr has the advantages of chip space and arbitrage force and flexibility in adjusting the rigidity. The embodiments described above are merely illustrative of the technical idea and the purpose of the present invention, and the purpose is to enable those skilled in the art to understand the contents of the present invention and implement it according to the scope of the patent. Dafanyi
刀部之剛性與避免 j作所揭*之精神所作之均等變化或修飾，減涵蓋在本 創作之專利範圍内。 M427221 【圖式簡單說明】 圖1所示為本創作一實施例具有重複切溝之鑽針結構之 外觀平面示意圖。 【主要元件符號說明】 10 鑽針結構 12 鑽柄部 14 鑽刃部The rigidity of the knives and the equal changes or modifications made to avoid the spirit of the knives are covered by the scope of this patent. M427221 [Simple Description of the Drawings] Fig. 1 is a schematic plan view showing the appearance of a burr structure having repeated grooving according to an embodiment of the present invention. [Main component symbol description] 10 Drill structure 12 Drill handle 14 Drill blade
16 切削刃 18 橫刃 20 第一切屑排出溝 Θ1 第一螺旋傾角 22 第二切屑排出溝 Θ2 第二螺旋傾角 24 第一區段 26 第二區段16 cutting edge 18 chisel edge 20 first chip discharge groove Θ1 first helix angle 22 second chip discharge groove Θ2 second helix angle 24 first section 26 second section
28 第三區段 728 Third Section 7