WO2017133207A1 - 旋转切削工具 - Google Patents

旋转切削工具 Download PDF

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Publication number
WO2017133207A1
WO2017133207A1 PCT/CN2016/093177 CN2016093177W WO2017133207A1 WO 2017133207 A1 WO2017133207 A1 WO 2017133207A1 CN 2016093177 W CN2016093177 W CN 2016093177W WO 2017133207 A1 WO2017133207 A1 WO 2017133207A1
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WO
WIPO (PCT)
Prior art keywords
spiral groove
cutting portion
spiral
cutting
cutting tool
Prior art date
Application number
PCT/CN2016/093177
Other languages
English (en)
French (fr)
Inventor
屈建国
李凯
邹卫贤
张辉
王磊
Original Assignee
深圳市金洲精工科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市金洲精工科技股份有限公司 filed Critical 深圳市金洲精工科技股份有限公司
Publication of WO2017133207A1 publication Critical patent/WO2017133207A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0472—Trapezium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/32—Chip breaking or chip evacuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles
    • B23C2210/0407—Cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles
    • B23C2210/0485—Helix angles

Definitions

  • the present invention belongs to the technical field of cutting tools, and in particular, to a rotary cutting tool.
  • Rotary cutting tool (micro milling cutter) is used to process the shape and cut of the printed circuit board.
  • the multi-layer circuit board is usually stacked, that is, the multi-layer circuit board is processed once, which is highly efficient due to the rotary cutting tool.
  • Poor performance the existence of machining torque and torque lead to distortion of the cutting edge of the milling cutter, the front end of the milling cutter is more severely deformed, resulting in a certain dimensional deviation between the upper plate and the lower plate, the processing effect is not good, affecting the circuit
  • the actual processing benefits of the board manufacturer is used to process the shape and cut of the printed circuit board.
  • An object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a rotary cutting tool which is excellent in workability.
  • a rotary cutting tool comprising a cutting portion, the cutting portion has a taper, a diameter of a front end of the cutting portion is smaller than a diameter of a rear end of the cutting portion, and the cutting portion has a plurality of a main spiral groove having the same spiral angle, each of the main spiral grooves is evenly distributed in the circumferential direction, and a rotation direction of each of the main spiral grooves is right-handed;
  • the cutting portion is further provided with a sub-spiral groove, and the auxiliary spiral groove includes a a left-handed spiral groove spirally rising toward a rear end of the cutting portion; a spirally rising auxiliary spiral groove and each of the main spiral grooves are formed with a plurality of cutting teeth in the cutting portion, along a spiral direction of the auxiliary spiral groove The tooth widths of the adjacent cutting teeth partially overlap.
  • the main spiral groove is provided with 5 to 8 strips.
  • the auxiliary spiral groove is provided with one, and the number of spiral turns of the auxiliary spiral groove is greater than one turn.
  • the main spiral groove has a uniform tooth width from the front end to the rear end.
  • the cutting portion has a taper of 0.02 to 0.03.
  • the right spiral groove of the main spiral groove ranges from 20° to 30°.
  • the left spiral spiral angle of the auxiliary spiral groove ranges from 75° to 84°.
  • the right spiral groove of the main spiral groove ranges from 22° to 28°.
  • the left spiral spiral angle of the auxiliary spiral groove ranges from 78° to 82°.
  • the cutting portion has a maximum diameter of 0.4 to 3.175 mm.
  • the rotary cutting tool provided by the invention adopts a left and right rotation structure to increase the actual area of the spiral groove cross section; and the taper is optimized, the double spiral groove is not used to meet the design, the groove width ratio is alternately changed, and the double groove is independently chipped.
  • the chip is not easy to block, and the processing effect is good, which ensures the actual processing efficiency of the board manufacturer.
  • FIG. 1 is a schematic plan view of a rotary cutting tool according to an embodiment of the present invention.
  • FIG. 2 is a partial schematic view showing a front end of a cutting portion of a rotary cutting tool according to an embodiment of the present invention
  • FIG. 3 is a plan view showing a front end of a cutting portion of a rotary cutting tool according to an embodiment of the present invention
  • FIG. 4 is a plan view showing a cutting portion of a rotary cutting tool according to an embodiment of the present invention.
  • FIG. 5 is a partial schematic view showing a front end of a cutting portion of a rotary cutting tool according to an embodiment of the present invention
  • FIG. 6 is a schematic view showing a cutting tooth of a rotary cutting tool according to an embodiment of the present invention.
  • Table 1 is comparative measured data of the rotary cutting tool provided by the embodiment of the present invention.
  • a rotary cutting tool can be applied to a multilayer circuit board stacking process, including a cutting portion 10 having a taper, the cutting.
  • the diameter of the front end 1 10 of the portion 10 is smaller than the diameter of the rear end of the cutting portion 10, and the cutting portion 10 has a tapered structure, that is, the front end diameter is relatively small, and the rear end diameter is relatively large, so that the multilayer circuit board is laminated.
  • the cutting portion 10 of the tapered structure can function as a positioning, and the upper plate and the lower plate are not easily misaligned, so as to reduce the dimensional difference between the upper plate and the lower plate, and improve the edge accuracy.
  • the shank portion 20 may be welded or integrally formed at the rear end of the cutting portion 10.
  • the cutting portion 10 may be made of a hard alloy material, and the shank portion 20 may be made of a stainless steel material.
  • the cutting portion 10 has a plurality of main spiral grooves 101 having the same helix angle. Each of the main spiral grooves 101 is evenly distributed in the circumferential direction and the rotation direction of each of the main spiral grooves 101 is right-handed.
  • the cutting portion 10 is also provided with a sub-spiral groove 102, the sub-spiral groove 102 includes a left-handed spiral groove spirally rising from a front end to a rear end of the cutting portion 10, and the auxiliary spiral groove 102 is spirally wound around a plurality of turns and intersects with each main spiral groove 101.
  • the spirally rising auxiliary spiral groove 102 and each of the main spiral grooves 101 are formed with a plurality of cutting teeth 130 in the cutting portion 10, and along the spiral direction of the auxiliary spiral groove 102, the tooth widths of the adjacent cutting teeth 130 are partially overlapped. (As shown in the overlapping portion C in Fig.
  • the setting of the two contributes to significantly improve the chip discharging performance and the cutting performance; the sub-spiral groove 102 and the main spiral groove 101 of the cutting portion 10 are respectively rotated to the left and right, and the spiral groove is added.
  • the actual cross-sectional area, the core thickness is increased, and the cutting portion 10 having a tapered structure and the double-slot independent chip evacuation are provided, and the chips are not easily clogged, and the addition is improved under the premise of ensuring cutting performance and chip discharging performance. Dimensional accuracy, good processing results, to ensure that the actual working efficiency of the circuit board manufacturers.
  • the taper design can reduce the dimensional difference and improve the edge accuracy.
  • the main spiral groove 101 may be provided with a suitable number of 5 to 8 or the like.
  • the sub spiral groove 102 is only provided with one, that is, only one left spiral groove is provided, and the The number of turns of the secondary spiral groove 102 is greater than one turn.
  • the cross-sectional shape of the cutting tooth 130 may be trapezoidal, which is similar to a rectangle.
  • the taper of the cutting portion 10 may be 0.02 to 0.03, and the taper refers to the diameter D1 of the rear end of the cutting portion 10.
  • the right spiral angle of the main spiral groove 101 ranges from 20° to 30°, for example, 22° to 28°, preferably 24°, 25° or 26°, and the right-handed main spiral groove 101 is mainly used.
  • the right-handed helix angle range is 20° -30°, which can ensure excellent cutting strength, reduce the vibration effect during machining, and improve the processing efficiency.
  • the angle design is beneficial to improve the edge of the board (PCB). The quality and the longevity of the rotary cutting tool.
  • the left spiral groove 102 has a left-handed helix angle ranging from 75° to 84°, for example, 78° to 82°, preferably 79°, 80° or 81°, and the left-handed sub-spiral groove 102 can realize chip breaking. , chip removal, left-handed spiral angle range of 75 ° -84 °, which can ensure smooth chip removal during processing, and thus improve the service life of rotary cutting tools.
  • the main spiral groove has the same tooth width from the front end to the rear end, and the uniform tooth width can ensure the uniform force of the processing plate and improve the processing stability.
  • the so-called tooth width is the width of the cutting area on the right-handed spiral groove of the tool. Since the tool itself has a taper design, the consistency of the tooth width at the front and rear ends of the cutting groove ensures uniform force on the processed sheet to further improve the processing stability.
  • the outer corner angle ⁇ of the cutting tooth 130 is 80°-100°. For example, 85° to 95°, preferably 88°, 92° or 93. .
  • the overlapping width of the tooth width portions between adjacent cutting teeth 130 is a tooth width S of 10 ⁇ 3 ⁇ 4 ⁇ 3 ⁇ 3 ⁇ 4, and the overlapping range may be a tooth width of 15%-25 ⁇ 3 ⁇ 4.
  • the tooth widths partially overlap, that is, the adjacent groove shape, the area or ratio in which the two adjacent teeth overlap each other.
  • the two teeth of the adjacent groove have overlapping areas, so the design of the overlapping ratio has an important influence on the cutting performance.
  • the overlapping area is too large, the cutting continuity is good, and the processed board edge is neat, but the row is arranged.
  • the chipping ability is reduced; the overlapping area is too small, the teeth involved in cutting the same area are reduced, and the chip discharging ability is good, but the edge of the board is prone to defects such as burrs and white spots.
  • the tooth pitch W between adjacent cutting teeth 130 is 2-3.5 times the tooth width.
  • the tooth height H of the cutting teeth 130 can be set according to actual conditions.
  • the groove ratios of the main spiral groove 101 and the auxiliary spiral groove 102 are alternately changed.
  • the maximum diameter of the cutting portion 10 may be 0.4 to 3.175 mm.
  • the applied outer diameter range can be 0.4-3.175mm.
  • Table 1 is the comparative measured data of the rotary cutting tool provided by the embodiment of the present invention
  • the front end outer diameter unit of Table 1 is: mm
  • the life unit: m the dimensional accuracy unit: mm
  • the rotary cutting tools of the respective examples and comparative examples are both 1.5 mm in diameter and 10 mm in length ( ⁇ 1.50 ⁇ 10.0).
  • the test sheet is HTG
  • the sheet thickness is 1.6 mm
  • the stack number is 5 stacks.
  • Processing parameters Feed amount F14mm/s speed S33krpm; It can be seen that the main spiral groove of the right-handed 7-blade and the sub-spiral groove of the left-handed 1 blade have a taper of 0.002 to 0.003 ⁇ , and the average service life is 18.68m, and the quality of the edge of the plate is mostly good. A small part is medium. After stacking the multilayer board, the average dimensional accuracy (ie, the offset between the panel and the bottom plate) is 0.0478 mm.
  • Comparative Example 1 and Comparative Example 2 have an average life of 13.9 m, which is only 74% of the product of the technical solution of the present invention, the edge quality is poor, the average dimensional accuracy is 0.097 mm, and the processing precision is low.
  • other taper and different main spiral grooves and sub-spiral grooves are used, and the edge quality of the plate is poor or extremely poor, and the average life is only 10.03 m, which is only 53% of the products adopting the technical scheme of the present invention, and the average dimensional accuracy is 0.064 mm.
  • the processing precision is low, and the rotary cutting tool provided by the embodiment of the invention can increase the service life by 86.24% and the precision by 33.89%.
  • the rotary cutting tool provided by the embodiment of the invention adopts a left and right rotation structure, increases the actual area of the spiral groove cross section, and the core thickness taper; and the taper is optimized, and the double spiral groove does not meet the design, and the groove width ratio is alternately changed.
  • Double groove independent chip removal the chip is not easy to block; the tooth shape adopts an approximately rectangular trapezoidal structure to ensure that the tooth width is constant or smallly changed during the cutting process, so as to ensure the cutting stability; Alternating teeth: including the same groove-shaped internal tooth spacing and the adjacent groove-shaped tooth width overlap ratio, the setting of the two helps to significantly improve the chip removal performance and cutting performance; in the premise of ensuring cutting performance and chip removal performance Next, the processing dimensional accuracy is improved, and the processing effect is good, which ensures the actual processing efficiency of the circuit board manufacturer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

一种旋转切削工具，包括切削部（10），切削部（10）具有锥度，切削部（10）前端（110）的直径小于切削部（10）后端的直径，切削部（10）具有多条螺旋角相同的主螺旋槽（101），各主螺旋槽（101）沿周向均布且各主螺旋槽（101）的旋向为右旋；切削部（10）还设置有副螺旋槽（102），副螺旋槽（102）包括一条由切削部（10）的前端向后端螺旋上升设置的左旋螺旋槽；螺旋上升的副螺旋槽（102）和各主螺旋槽（101）在切削部（10）形成有多个切削齿（130），沿着副螺旋槽（102）的螺旋方向，相邻切削齿之间齿宽部分重叠。旋转切削工具的切削部的副螺旋槽和主螺旋槽分别采用了左右旋结构，增加了螺旋槽横截面实际面积，不易堵塞切屑，寿命可提高86.24%，精度可提高33.89%。

Description

旋转切削工具
技术领域
[0001] 本发明属于切削工具技术领域， 尤其涉及一种旋转切削工具。
背景技术
[0002] 随着电子设备行业追求更薄、 更快的发展， 对印制电路板的加工要求越来越高 ， 因此提高加工效率及加工精度对整个行业的发展是至关重要的。 旋转切削工 具 （微型銑刀） 用于加工印制电路板的外形及切断， 在数控加工中， 通常将多 层电路板常堆叠加工， 即一次加工多层电路板， 效率高， 由于旋转切削工具性 能欠佳， 加工扭力和扭矩的存在导致銑刀切削刃发生扭曲变形， 銑刀的前端变 形较为严重， 导致堆叠在上方板材和下方板材之间存在一定的尺寸偏差， 加工 效果欠佳， 影响电路板厂商实际的加工效益。
技术问题
[0003] 本发明的目的在于克服上述现有技术的不足， 提供了旋转切削工具， 其加工性 能佳。
问题的解决方案
技术解决方案
[0004] 本发明的技术方案是： 一种旋转切削工具， 包括切削部， 所述切削部具有锥度 ， 所述切削部前端的直径小于所述切削部后端的直径， 所述切削部具有多条螺 旋角相同的主螺旋槽， 各所述主螺旋槽沿周向均布且各所述主螺旋槽的旋向为 右旋； 所述切削部还设置有副螺旋槽， 所述副螺旋槽包括一条由所述切削部的 前端向后端螺旋上升设置的左旋螺旋槽； 螺旋上升的副螺旋槽和各所述主螺旋 槽在切削部形成有多个切削齿， 沿着副螺旋槽的螺旋方向， 相邻切削齿之间齿 宽部分重叠。
[0005] 可选地， 所述主螺旋槽设置有 5至 8条。
[0006] 可选地， 所述副螺旋槽设置有 1条， 且所述副螺旋槽的螺旋圈数大于一圈。
[0007] 可选地， 所述主旋螺旋槽从前端至后端的齿宽一致。 [0008] 可选地， 所述切削部的锥度为 0.02至 0.03。
[0009] 可选地， 所述主螺旋槽的右旋螺旋角范围 20°至 30°。
[0010] 可选地， 所述副螺旋槽的左旋螺旋角范围 75°至 84°。
[0011] 可选地， 所述主螺旋槽的右旋螺旋角范围 22°-28°。
[0012] 可选地， 所述副螺旋槽的左旋螺旋角范围 78°至 82°。
[0013] 可选地， 所述切削部的最大直径为 0.4至 3.175mm。
发明的有益效果
有益效果
[0014] 本发明所提供的旋转切削工具， 其采用左右旋结构， 增加螺旋槽横截面实际面 积； 且锥度优化， 采用双螺旋槽不交汇设计， 沟幅比值交错变化， 双槽独立排 屑， 切屑不易堵塞， 加工效果佳， 保证了电路板厂商的实际加工效益。
对附图的简要说明
附图说明
[0015] 为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例中所需要使用 的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实 施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以 根据这些附图获得其他的附图。
[0016] 图 1是本发明实施例提供的旋转切削工具的平面示意图；
[0017] 图 2是本发明实施例提供的旋转切削工具的切削部前端局部示意图；
[0018] 图 3是本发明实施例提供的旋转切削工具的切削部前端的平面示意图；
[0019] 图 4是本发明实施例提供的旋转切削工具的切削部的平面示意图；
[0020] 图 5是本发明实施例提供的旋转切削工具的切削部前端局部示意图；
[0021] 图 6是本发明实施例提供的旋转切削工具的切削齿示意图；
[0022] 表 1是本发明实施例所提供的旋转切削工具的对比实测数据。
本发明的实施方式
[0023] 为了使本发明的目的、 技术方案及优点更加清楚明白， 以下结合附图及实施例 ， 对本发明进行进一步详细说明。 应当理解， 此处所描述的具体实施例仅仅用 以解释本发明， 并不用于限定本发明。
[0024] 需要说明的是， 当元件被称为 "固定于"或"设置于"另一个元件， 它可以直接在 另一个元件上或者可能同吋存在居中元件。 当一个元件被称为是 "连接于"另一个 元件， 它可以是直接连接到另一个元件或者可能同吋存在居中元件。
[0025] 还需要说明的是， 本发明实施例中的左、 右、 上、 下等方位用语， 仅是互为相 对概念或是以产品的正常使用状态为参考的， 而不应该认为是具有限制性的。
[0026] 如图 1至图 6所示， 本发明实施例提供的一种旋转切削工具， 可以应用于多层电 路板堆叠加工， 包括切削部 10， 所述切削部 10具有锥度， 所述切削部 10的前端 1 10的直径小于所述切削部 10的后端的直径， 切削部 10为顺锥结构， 即前端直径 相对较小， 后端直径相对较大， 这样， 在多层电路板层叠加工吋， 顺锥结构的 切削部 10可以起到定位的作用， 上方板材和下方板材之间不易错位， 以降低上 方板材和下方板材之间的尺寸差， 提升板边精度。 切削部 10的后端可以焊接有 或一体成型有刀柄部 20， 本实施例中， 切削部 10可以采用硬质合金材料制成， 刀柄部 20可以采用不锈钢材料制成。 所述切削部 10具有多条螺旋角相同的主螺 旋槽 101， 各所述主螺旋槽 101沿周向均布且各所述主螺旋槽 101的旋向为右旋； 所述切削部 10还设置有副螺旋槽 102， 所述副螺旋槽 102包括一条由所述切削部 1 0的前端向后端螺旋上升设置的左旋螺旋槽， 副螺旋槽 102螺旋环绕有多圈且与 各主螺旋槽 101交叉设置； 螺旋上升的副螺旋槽 102和各所述主螺旋槽 101在切削 部 10形成有多个切削齿 130， 沿着副螺旋槽 102的螺旋方向， 相邻切削齿 130之间 齿宽部分重叠 （如图 5中的重叠部分 C) ， 两者的设置有助于显著地提高排屑性 能和切削性能； 切削部 10的副螺旋槽 102和主螺旋槽 101分别采用左右旋结构， 增加螺旋槽横截面实际面积， 芯厚增加， 且配合具有顺锥结构的切削部 10及双 槽独立排屑设置， 切屑不易堵塞， 在保证切削性能和排屑性能的前提下， 提高 加工尺寸精度， 加工效果佳， 保证了电路板厂商的实际加工效益。
[0027] 具体应用中， 锥度设计能够， 降低其尺寸差， 提升板边精度。
[0028] 具体地， 所述主螺旋槽 101可以设置有 5至 8条等合适数量。
[0029] 具体地， 所述副螺旋槽 102仅设置有 1条， 即左旋螺旋槽仅设置有 1条， 且所述 副螺旋槽 102的螺旋圈数大于一圈。
[0030] 具体地， 所述切削齿 130的断面形状可呈梯形， 其类似于矩形。
[0031] 具体地， 所述切削部 10的锥度可以为 0.02至 0.03， 锥度指切削部 10后端直径 D1
、 前端直径 D2的差值与切削部 10的长度 L2之间的比值， 即锥度 T= (D1-D2) /L2
[0032] 具体地， 所述主螺旋槽 101的右旋螺旋角范围 20°-30°， 例如 22°至 28°， 优选 24° 、 25°或 26°， 右旋的主螺旋槽 101主要用于实现切削加工， 右旋螺旋角范围为 20° -30°， 能够保证其具有极好的切削强度， 降低加工过程中振动效应， 利于提升 加工效率， 其角度的设计利于提高板边 （PCB) 的质量， 且有利于延长旋转切削 工具的使用寿命。
[0033] 具体地， 所述副螺旋槽 102的左旋螺旋角范围 75°-84°， 例如 78°至 82°， 优选 79° 、 80°或 81°， 左旋的副螺旋槽 102可以实现断屑， 排屑， 左旋螺旋角范围 75°-84° ， 其能够保证加工过程中排屑顺畅， 进而提高旋转切削工具的使用寿命。
[0034] 具体地， 所述主旋螺旋槽从前端至后端的齿宽一致， 均匀一致的齿宽能够保证 加工板材吋受力均匀， 提升加工稳定性。 所谓齿宽就是刀具右旋螺旋槽上进行 切削区域的宽度。 由于刀具本身具有锥度设计， 所以保证切削槽前后端齿宽的 一致性能够保证加工板材吋受力均匀， 以进一步提升加工的稳定性。
[0035] 具体地， 所述切削齿 130的外底角 Α为 80°-100°。 例如 85°至 95°， 优选 88°、 92° 或 93。。
[0036] 具体地， 相邻切削齿 130之间齿宽部分重叠的重叠范围为 10<¾-30<¾的齿宽 S， 重 叠范围可以为 15%-25<¾的齿宽。 齿宽部分重叠， 即相邻槽形， 两个临近齿之间 相互重叠的区域或比例。 为了保证切削的连续性， 相邻槽形的两齿有重叠区域 ， 因此重叠比例大小的设计对切削性能有重要影响， 重叠区域过大， 其切削连 续性好， 加工的板边整齐， 但是排屑能力降低； 重叠区域过小， 参与切削同一 区域的齿减少， 排屑能力好， 但是板边容易出现毛刺、 白点等缺陷。
[0037] 具体地， 相邻切削齿 130之间齿间距 W为 2-3.5倍齿宽。
[0038] 具体地， 切削齿 130的齿高 H可以根据实际情况设定。
[0039] 具体地， 所述主螺旋槽 101、 副螺旋槽 102的沟幅比值交错变化设置。 [0040] 具体地， 切削部 10的最大直径可以为 0.4至 3.175mm。
[0041] 本发明实施例所提供的旋转切削工具，
应用于的加工外径范围可以为 0.4-3.175mm。
[0042] 表 1是本发明实施例所提供的旋转切削工具的对比实测数据， 表 1中前端外径单 位： mm， 后端外径单位： mm， 寿命单位： m， 尺寸精度单位： mm， 各实施例 和比较例的旋转切削工具均采用直径 1.5mm、 长度 10mm的规格 （Φ1.50χ10.0) ， 测试加工板材为 HTG， 板厚 1.6mm， 叠数 5叠， 加工参数： 进给量 F14mm/s转 速 S33krpm; 可见， 在右旋 7刃的主螺旋槽和左旋 1刃的副螺旋槽， 且锥度为 0.002 至 0.003吋， 其平均使用寿命为 18.68m,且板边质量大部分为好， 少部分为中， 在 多层板堆叠加工吋， 平均尺寸精度 （即面板与底板之间的偏移量） 为 0.0478mm 。 而比较例中， 例如比较例 1和比较例 2， 其平均寿命为 13.9m， 仅为采用本发明 技术方案产品的 74%， 板边质量差， 平均尺寸精度为 0.097mm， 加工精度低。 而 采用其它锥度及不同主螺旋槽、 副螺旋槽吋， 其板边质量差或极差， 平均寿命 仅 10.03m， 仅为采用本发明技术方案产品的 53%， 且平均尺寸精度为 0.064mm， 加工精度低， 本发明实施例所提供的旋转切削工具， 其寿命可提高 86.24%， 精 度可提高 33.89%。
[0043] 本发明实施例所提供的旋转切削工具， 其采用左右旋结构， 增加螺旋槽横截面 实际面积， 芯厚锥度； 且锥度优化， 采用双螺旋槽不交汇设计， 沟幅比值交错 变化， 双槽独立排屑， 切屑不易堵塞； 齿形采用近似矩形的梯形结构， 保证在 切削过程中随着磨损量的增加， 齿宽不变或小幅变化， 从而保证切削稳定性； 而且旋转切削工具的齿交替： 包括同一槽形内齿间距和相邻槽形相近齿的齿宽 重叠比例， 两者的设置有助于显著地提高排屑性能和切削性能； 在保证切削性 能和排屑性能的前提下， 提高加工尺寸精度， 加工效果佳， 保证了电路板厂商 的实际加工效益。
[0044] 以上所述仅为本发明的较佳实施例而已， 并不用以限制本发明， 凡在本发明的 精神和原则之内所作的任何修改、 等同替换或改进等， 均应包含在本发明的保 护范围之内。

Claims

权利要求书
[权利要求 1] 一种旋转切削工具， 包括切削部， 其特征在于， 所述切削部具有锥度 ， 所述切削部前端的直径小于所述切削部后端的直径， 所述切削部具 有多条螺旋角相同的主螺旋槽， 各所述主螺旋槽沿周向均布且各所述 主螺旋槽的旋向为右旋； 所述切削部还设置有副螺旋槽， 所述副螺旋 槽包括一条由所述切削部的前端向后端螺旋上升设置的左旋螺旋槽； 螺旋上升的副螺旋槽和各所述主螺旋槽在切削部形成有多个切削齿， 沿着副螺旋槽的螺旋方向， 相邻切削齿之间齿宽部分重叠。
权利要求 2] 如权利要求 1所述的旋转切削工具， 其特征在于， 所述主螺旋槽设置 有 5至 8条。
权利要求 3] 如权利要求 1所述的旋转切削工具， 其特征在于， 所述副螺旋槽设置 有 1条， 且所述副螺旋槽的螺旋圈数大于一圈。
权利要求 4] 如权利要求 1所述的旋转切削工具， 其特征在于， 所述主旋螺旋槽从 前端至后端的齿宽一致。
权利要求 5] 如权利要求 1至 4中任一项所述的旋转切削工具， 其特征在于， 所述切 削部的锥度为 0.02至 0.03。
权利要求 6] 如权利要求 1至 4中任一项所述的旋转切削工具， 其特征在于， 所述主 螺旋槽的右旋螺旋角范围 20°至 30°。
权利要求 7] 如权利要求 1至 4中任一项所述的旋转切削工具， 其特征在于， 所述副 螺旋槽的左旋螺旋角范围 75°至 84°。
权利要求 8] 如权利要求 6所述的旋转切削工具， 其特征在于， 所述主螺旋槽的右 旋螺旋角范围 22°-28°。
权利要求 9] 如权利要求 7所述的旋转切削工具， 其特征在于， 所述副螺旋槽的左 旋螺旋角范围 78°至 82°。
权利要求 10] 如权利要求 1至 4中任一项所述的旋转切削工具， 其特征在于， 所述切 削部的最大直径为 0.4至 3.175mm。
PCT/CN2016/093177 2016-02-02 2016-08-04 旋转切削工具 WO2017133207A1 (zh)

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CN105642983A (zh) * 2016-02-02 2016-06-08 深圳市金洲精工科技股份有限公司 旋转切削工具
CN109648125B (zh) * 2019-01-25 2020-06-16 大连理工大学 一种能够实现左、右旋切削刃交替切削的多齿设计方法
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