M333970 八、新型說明： 【新型所屬之技術領域】 本創作係關於一種銑刀結構改良，尤指一種防止 ' 積屑可提升切削效果之銑刀結構改良者，主要係於順 - 著螺旋刀刃部的外側設有一斷削部，且每一螺旋刀刃 部的末端為一 R型鈍角設計，又刀刃部與刀刃部呈非 9 0度的排列方式，如是結構者，達有效決解積屑問 .題，及減少加工時的震動，進而可延長刀具的使用壽 _ 命及提高加工物的表面精度。 【先前技術】 就「銑刀」係運用於銑車床上，即係藉由夾筒座 而將銑刀夾設於上，並進高速旋轉，以對加工物進行 直線的切削，而習用的銑刀1 〇結構（如第一圖所示 者）主要係由四個螺旋刀刃部1 2旋設於桿體1 1前 端，而兩相鄰的刀刃部1 2間設有一排屑槽1 3 ，且 刀刃部1 2與刀刃部1 2係呈9 0度的排列方式（如 籲第二圖所示者），然此結構於加工切削使用時常會遇 見的問題如后： 由於刀刃部1 2係呈螺旋繞設於桿體1 1上，因 此其對加工物所產生的切屑則呈長條狀，因高速旋 轉，導到長條狀的切屑不易由排屑槽1 3排出，反而 容易於加工過程時纏繞於螺旋刀刃部1 2上；又螺旋 刀刃部1 2與螺旋刀刃部1 2係呈等角度排列，因此 其加工物的接觸面積大，如此在進行加工切削作業， 所產生的震動及噪音相對也大；前述種種因素皆影響 5 M333970 銑刀的使用壽命，及加工的品質者。 有鑑如此，申請人遂為了能確實且有效地解決習 式種種問題，且經由實地測試後，而開發設計出本案， 【新型内容】 ^ 本創作之主要目的，乃在於可有效決解積屑問 題，及減少加工時的震動，進而可延長刀具的使用壽 命及提高加工物的表面精度之銑刀結構改良。 【實施方式】 Φ 為使 貴審查委員能進一步了解本創作之内容 茲以下文所述較佳實施例配合圖式詳細說明如后： 請參閱第三圖至第六圖所示者，本創作主要係由 四個螺旋刀刃部2 2旋設於桿體2 1前端，而兩相鄰 的螺旋刀刃部2 2間設有一排屑槽2 3 ，其特徵在 於：順著螺旋刀刃部2 2的外側設有一斷削部2 4 ， 且每一螺旋刀刃部2 2的末端為一 R型鈍角設計之R 型排屑槽2 5，且相鄰的螺旋刀刃部2 2與螺旋刀刃 •部2 2呈非9 0度的排列方式，即以9 0度為中心各 略偏2〜3度左右的設計，即呈9 3度、8 7度、9 2 度、8 8度之角度設計（如第四圖所示者）； 如是結構者，當進行高速旋轉對加工物進行切削 動時，首先藉由螺旋刀刃部2 2對加工物進行切削， 而形成切屑，然後方的斷削部2 4又對該切屑進行一 道切斷的動作，而令切屑形成短條（片）狀排出，而 可有效解決積屑問題，又其螺旋刀刃部2 2的末端係 呈R型純角設計的R型排屑槽2 5，又能進行快速排 6 M333970 屑的動作者，在在可減少積屑問題產生。 再者，由於螺旋刀刃部2 2間係呈非9 0度的排 列，且又加上斷削部2 4的設計，因此可縮短加工物 的接觸面積大，進而減少於加工切削作業，所產生的 震動，如此便可提高加工之進給速度，使加工物的表 面精度提升。更進而延長使用壽命。 綜上所陳，本創作實具進步性及實用性者，乃爰 依法向 鈞局提出申請。 【圖式簡單說明】 第一圖，係為習用之銑刀之外觀示意圖。 第二圖，係為習用之銑刀之端面示意圖。 第三圖，係為本創作立體示意圖。 第四圖，係為本創作之端面示意圖。 第五圖，係為本創作之平面示意圖。 第六圖，係為本創作之剖視圖。 【主要元件符號說明】 1 0 —銑刀 1 1 —桿體 1 3 —排屑槽 2 0 —銑刀 2 1 —桿體 2 3 —排屑槽 1 2 —螺旋刀刃部 2 2 —螺旋刀刃部 2 4 —斷削部 2 5 — R型排屑槽M333970 VIII. New description: [New technical field] This creation is about the improvement of a milling cutter structure, especially the improvement of the milling cutter structure which prevents the accumulation of chips and can improve the cutting effect, mainly in the spiral-blade cutting edge The outer side is provided with a broken portion, and the end of each spiral blade portion is an R-shaped obtuse angle design, and the blade edge portion and the blade edge portion are arranged at a non-90 degree degree. If it is a structure, an effective solution is made. Problem, and reduce the vibration during processing, which can extend the life of the tool and improve the surface accuracy of the workpiece. [Prior Art] As the "milling cutter" is applied to the milling machine, the milling cutter is clamped on the upper side of the cylinder and rotated at a high speed to perform straight cutting on the workpiece, and the conventional milling cutter 1 〇 structure (as shown in the first figure) is mainly provided by four spiral blade portions 1 2 screwed to the front end of the rod body 1 1 , and two adjacent blade portions 1 2 are provided with a chip flute 13 , and The blade portion 1 2 and the blade portion 12 are arranged at 90 degrees (as shown in the second figure), but the problem often encountered when the structure is used for machining and cutting is as follows: Since the blade portion 1 2 is The spiral is wound around the rod body 1 1 , so that the chips generated by the workpiece are elongated, and the chips that are led to the long strip are not easily discharged by the chip flute 13 due to the high speed rotation, and are easy to be processed. When it is wound on the spiral blade portion 12; the spiral blade portion 12 and the spiral blade portion 12 are arranged at equal angles, so that the contact area of the workpiece is large, so that the vibration and noise generated during the machining and cutting operation are generated. Relatively large; all of the above factors affect the life of the 5 M333970 milling cutter , Quality and processing of those. In view of this, the applicant has developed and designed the case in order to solve the problems of the formula in a practical and effective manner, and [the new content] ^ The main purpose of this creation is to effectively resolve the accumulated debris. Problems, and the reduction of vibration during machining, which can extend the life of the tool and improve the surface precision of the workpiece. [Embodiment] Φ In order to enable the reviewing committee to further understand the contents of this creation, the following description of the preferred embodiment with the drawings is as follows: Please refer to the figures shown in the third to sixth figures. The four spiral blade portions 2 2 are screwed to the front end of the rod body 2 1 , and the two adjacent spiral blade portions 22 are disposed with a chip flute 2 3 , which is characterized by: the outer side of the spiral blade portion 2 2 A cutting portion 2 4 is provided, and the end of each spiral blade portion 2 2 is an R-shaped chip flute 25 of an R-shaped obtuse angle design, and the adjacent spiral blade portion 2 2 and the spiral blade portion 2 2 are The non-90 degree arrangement, that is, the design with a slight deviation of about 2 to 3 degrees at the center of 90 degrees, that is, the design of the angles of 9 3 degrees, 8 7 degrees, 92 degrees, and 8 8 degrees (such as the fourth In the case of the structure, when the workpiece is subjected to high-speed rotation to cut the workpiece, the workpiece is first cut by the spiral blade portion 2 2 to form chips, and then the broken portion 24 is again The chip performs a cutting action, and the chips are formed into a short strip (sheet), which can effectively solve the product. Problem, but also its helical edge portion 22 of the terminal-based form pure R form angle design of flutes 25 R type, and can quickly move the discharge of cuttings 6 M333970, can be generated in reducing dust accumulation problem. Furthermore, since the spiral blade portion 22 is arranged at a degree other than 90 degrees and the design of the fracture portion 24 is added, the contact area of the workpiece can be shortened, and the machining operation can be reduced. The vibration can increase the feed speed of the machining and improve the surface precision of the workpiece. Further extending the service life. In summary, if the creation is progressive and practical, it is an application to the bureau. [Simple description of the drawing] The first figure is a schematic view of the appearance of the conventional milling cutter. The second figure is a schematic view of the end face of a conventional milling cutter. The third picture is a three-dimensional diagram of the creation. The fourth picture is a schematic diagram of the end face of the creation. The fifth picture is a schematic diagram of the creation. The sixth picture is a cross-sectional view of the creation. [Main component symbol description] 1 0 — Milling cutter 1 1 — Rod 1 3 — Chip chute 2 0 — Milling cutter 2 1 — Rod 2 3 — Chip flute 1 2 — Spiral blade 2 2 — Spiral blade 2 4 —Drilling section 2 5 — R type flute