WO2014179974A1 - 金属板材上的制孔方法 - Google Patents

金属板材上的制孔方法 Download PDF

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Publication number
WO2014179974A1
WO2014179974A1 PCT/CN2013/075430 CN2013075430W WO2014179974A1 WO 2014179974 A1 WO2014179974 A1 WO 2014179974A1 CN 2013075430 W CN2013075430 W CN 2013075430W WO 2014179974 A1 WO2014179974 A1 WO 2014179974A1
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Prior art keywords
drilled
auxiliary processing
hole
area
processing piece
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PCT/CN2013/075430
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English (en)
French (fr)
Inventor
文霞
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Wen Xia
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Application filed by Wen Xia filed Critical Wen Xia
Priority to CN201380002482.8A priority Critical patent/CN103842116B/zh
Priority to PCT/CN2013/075430 priority patent/WO2014179974A1/zh
Publication of WO2014179974A1 publication Critical patent/WO2014179974A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
    • B23B35/005—Measures for preventing splittering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods

Definitions

  • the invention relates to a metal processing method, in particular to a hole making method on a metal plate.
  • Chinese patent CN92100704.3 Disclosed is a composite lead-in board for abutting a printed circuit board during drilling of a printed circuit board, comprising a drilling lubricant distributed over a surface of a non-metallic sheet constituting the lead-in board or forming a portion thereof .
  • China Patent CN200810242920.9 A small aperture high density drilling method for a printed circuit board is disclosed, which is suitable for processing a diameter of 0.35 mm
  • the following dense holes, the main steps include: zero position, set drilling rig parameters, drilling positioning holes, upper pad, upper substrate, upper aluminum sheet, drilling, grinding peak, blowing, inspection.
  • the above-mentioned prior art patented drilling techniques are all used for printed circuit boards, and the material of the printed circuit board is mainly composed of a high molecular polymer, for example, mainly epoxy resin; epoxy resin material and metal The nature of the materials is different, so it is difficult to apply the drilling technology of printed circuit boards directly to metal sheets, especially curved metal sheets.
  • a method for making a hole in a metal sheet comprising the steps of: providing a metal sheet and an auxiliary processing sheet, the metal sheet having a region to be drilled, the region to be drilled having a first surface and opposite to the first surface The second surface, the hardness value of the auxiliary processing sheet is greater than the hardness value of the metal sheet 0.7 times; the auxiliary processing piece is attached to the first surface of the area to be drilled; a drill bit is drilled in the auxiliary processing piece and the area to be drilled, and the rotation speed of the drill bit during the drilling process is greater than 8000 Turn / Minutes; and removing the auxiliary processing piece from the area to be drilled.
  • a method for forming a hole in a metal sheet comprising the steps of: providing a metal sheet, a first auxiliary processing sheet and a second auxiliary processing sheet, the metal sheet having a region to be drilled, the region to be drilled having a first surface and a second surface opposite to the first surface, wherein the hardness values of the auxiliary first auxiliary processing piece and the second auxiliary processing piece are respectively the hardness value of the metal plate 0.8 ⁇ 1.2 Folding the first auxiliary processing piece and the second auxiliary processing piece respectively on the first surface and the second surface of the to-be-drilled area; drilling a hole in the to-be-drilled area with a drill bit, and The drill bit sequentially penetrates the first auxiliary processing piece, the metal plate and the second auxiliary processing piece to form a through hole in the area to be drilled, and the rotation speed of the drill bit during the drilling process is greater than 8000 rpm; and removing the first auxiliary processing piece and the second auxiliary processing piece from the area to be drilled.
  • the hardness value of the auxiliary processed sheet is greater than 0.7 of the hardness value of the metal sheet.
  • the auxiliary processing piece is attached to the first surface of the area to be drilled, and the burr generated after the first surface is drilled can be adhered to the first auxiliary processing piece, so that most of the formed during the drilling process is even All burrs can be taken away directly by the auxiliary processing piece, so that the burrs can be easily eliminated and other processes such as grinding can be omitted, the hole quality is improved, the processing convenience of the metal plate is improved, and the processing cost is reduced.
  • the rotation speed of the drill bit is greater than 8000 rpm, this ensures that the inner wall of the hole formed by the drill hole is smooth and more beautiful.
  • FIG. 1 is a schematic plan view showing a metal plate of a method for forming a hole in a metal plate according to an embodiment of the present invention.
  • Figure 2 is a schematic view of the metal sheet shown in Figure 1 taken along line II-II'.
  • Fig. 3 is a schematic view showing a state in which a metal plate and an auxiliary processing piece are bonded together after being prepared for drilling in the process of the hole making method on the metal plate according to the embodiment of the present invention.
  • Fig. 4 is a schematic view of the hole after the hole making method on the metal sheet according to the embodiment of the present invention.
  • Figure 5 In the process of the hole making method on the metal plate according to another embodiment of the present invention, the metal plate, the first auxiliary processed piece and the second auxiliary processed piece are bonded together to prepare a hole for drilling.
  • the method for forming a hole in a metal plate includes the following steps; first, providing a metal plate 12 And an auxiliary processing piece 14 , wherein the metal sheet 12 has a region to be drilled 122 having a first surface 1222 and a second surface opposite to the first surface 1222 1224, the hardness of the auxiliary processing piece 14 is greater than 0.7 times the hardness value of the metal sheet 12; then, the auxiliary processing piece 14 is attached to the first surface 1222 of the area to be drilled 122.
  • the drill bit 16 is drilled in the auxiliary processing piece 14 and the area to be drilled 122, wherein the speed of the drill bit is greater than 8000 rpm; and the auxiliary processing piece 14 is taken from the area to be drilled. 122 is removed to form a less burr or even burr-free aperture 1226 on the first surface 1222.
  • the hole 1226 is formed.
  • the diameter is preferably a small hole of 0.3 mm to 3 mm.
  • the metal sheet 12 may be a magnesium alloy, an aluminum alloy, a stainless steel or other metal material suitable for use in electronic products; a region to be drilled 122
  • the first surface 1222 can be used as an outer surface and the second surface 1224 can be used as an inner surface.
  • the auxiliary processing piece 14 can be selected according to the metal sheet 12 used, and the selected standard is mainly to make the auxiliary processing piece
  • the hardness of 14 is matched with the metal sheet 12, and even if the hardness value of the auxiliary processing sheet 14 is greater than 0.7 times the hardness value of the metal sheet 12, it is preferable that the hardness value of the auxiliary processing sheet 14 is a metal sheet.
  • the hardness value of 12 is 0.8 to 1.2 times, and more preferably the hardness of the auxiliary processed sheet 14 is 0.8 to 1.1 times the hardness value of the metal sheet 12, for example, in the present embodiment, the metal sheet 12
  • the auxiliary processing sheets 14 are made of aluminum alloy, respectively.
  • the thickness of the auxiliary processing sheet 14 is preferably smaller than the thickness of the metal sheet 12, which can reduce the cost and improve the operability of the drilling process, preferably the auxiliary processing sheet.
  • the thickness of 14 is 0.1 to 0.15 times the thickness of the metal sheet 12 in the area to be drilled 122.
  • First surface 1222 of sheet metal to be drilled region 122 In the present embodiment, the metal sheet 12 is a curved sheet; it is understood that the invention is not limited thereto.
  • the sheet metal 12 may also be a flat sheet.
  • Auxiliary processing sheet 14 The curvature of curvature may be the same as that of the first surface 1222, which facilitates positioning during drilling; it will be appreciated that in other embodiments, the contact surface of the auxiliary processing sheet 14 with the first surface 1222 and the first surface The 1222 has the same or similar curvature, and the auxiliary processing piece 14 is closely attached to the first surface 1222.
  • auxiliary processing piece 14 When the auxiliary processing piece 14 is attached to the first surface 1222 of the area to be drilled 122, in order to make the auxiliary processing piece 14 It is closely attached to the first surface 1222, and can be fixed together by another fixing member (not shown).
  • the drill bit 16 is used in the auxiliary processing piece 14 and the area to be drilled 122
  • the position of the drill bit 16 relative to the auxiliary processing piece 14 and the area to be drilled 122 may be adjusted so that the axis 162 of the drill bit 16 and the first surface 1222
  • the cutting plane 1220 at the center of the predetermined hole machining is perpendicular to the hole 1226. This prevents the formed hole 1226 from being deformed, especially when the first surface 1222 is curved. 1226 Uniform, uniform, and enhance the appearance of sheet metal 12.
  • the position of the adjustment bit 16 relative to the auxiliary processing piece 14 and the area to be drilled 122 can be mounted on the drill bit 16
  • the upper detection control unit is implemented, for example, by detecting the position of the drill bit 16 relative to the auxiliary processing piece 14 and the area to be drilled 122, and then controlling the drill bit 16 Turn to adjust the relative position.
  • the rotational speed of the drill bit is greater than 8000 rpm, preferably such that the rotational speed of the drill bit is greater than 10,000. Turn / minute.
  • a rotatable support platform in order to ensure stability during drilling, and to adjust the position of the auxiliary processing piece 14 and the area to be drilled 122, a rotatable support platform is provided.
  • the support platform 18 includes a base 182 and a support portion 184 disposed on the base 182.
  • the support portion 184 of the support platform 18 is a replaceable component, which facilitates the support platform 18 Can be applied to different metal sheets 12 processing.
  • the support portion 184 has a top surface 1842 and a matching hole 1844 formed on the top surface 1842.
  • the shape of the top surface 1842 can be the same as the second surface.
  • the predetermined hole processing corresponds to ensure that the drill bit 16 does not drill into the support portion 184.
  • the hardness value of the auxiliary processed sheet 14 is greater than 0.7 of the hardness value of the metal sheet 12.
  • the auxiliary processing piece 14 is attached to the first surface 1222 of the area to be drilled 122, and the burr generated after the first surface 1222 is drilled can be adhered to the auxiliary processing piece 14 So that most or even all of the burrs formed during the drilling process can be taken away directly by the auxiliary processing piece 14, so that the burrs are easily eliminated and other processes such as grinding can be omitted, and the metal sheet is improved. Processing convenience and reduced processing costs.
  • the rotation speed of the drill bit is greater than 8000 rpm, which ensures the hole formed by the hole 1226.
  • the inner wall is smooth and non-deformed, which is more beautiful.
  • the hardness value of the metal sheet 12 is 0.8 to 1.1.
  • the speed of the bit and the bit is 10,000 to 30,000 rpm, the burrs generated during the formation of the hole 1226 can be easily removed, and the hole 1226 can be made. It has a more stable verticality and smoothness of the inner wall, so that the metal sheet 12 has a better appearance.
  • the hole making method on the metal sheet according to another embodiment of the present invention is similar to the foregoing embodiment, except that the second auxiliary processing sheet 28 is further provided in the embodiment.
  • the second auxiliary processing piece 28 is attached to the metal sheet 22
  • the second auxiliary surface 24 of the area to be drilled is still attached to the first surface 2222 of the to-be-drilled area of the metal sheet 22.
  • Most or even all of the burrs generated on the second surface 2224 after the through hole has been drilled at the rpm can be adhered to the second auxiliary processing piece 28, allowing the second auxiliary processing piece 28 to be carried away; surface
  • the easy removal of the 2222 burr also allows the burrs of the second surface 2224 to be easily removed 2 .
  • the hardness values of the auxiliary first auxiliary processing piece 24 and the second auxiliary processing piece 28 may be respectively metal plates. 22
  • the hardness value is 0.8 ⁇ 1.2 times, the area to be drilled of the metal sheet 22 is curved, and the first auxiliary processing piece 24 and the second auxiliary processing piece 28
  • the shape matches the area to be drilled, and prior to drilling with the drill bit 26, it is preferred to adjust the position of the drill bit 26 relative to the first auxiliary processing piece 24 and the area to be drilled so that the drill bit 26
  • the axis is perpendicular to the tangent plane of the center point of the first surface 2222 where the predetermined hole is machined.
  • the first auxiliary processing piece 24 can also be brought close to the drill bit 26, and the first auxiliary processing piece 24 It is made of a metal material, and the second auxiliary processing piece 28 is made of a plastic material, which can reduce the cost.
  • a specific experiment is carried out by using a method for forming a hole in a metal plate according to an embodiment of the present invention, wherein the material of the metal plate is aluminum alloy, the material of the auxiliary processing piece is plastic, and the area to be drilled is curved, and the first surface of the area to be drilled
  • the auxiliary processing pieces are attached, and some experimental data are shown in the following table:
  • Hardness ratio of auxiliary processing sheet to metal sheet Bit speed Surface burr Hole appearance 0.4 10000 More burrs Uneven 0.6 30000 a small amount of burrs Uneven 0.7 8000 a small amount of burrs Uneven 0.7 10000 a small amount of burrs Uniform, uniform 0.7 25000 No burr Uniform, uniform 0.8 6000 Small amount of burr Uneven 0.8 7000 Almost without burrs Uneven 0.8 8000 Almost without burrs Uniform, uniform 0.8 9000 Almost without burrs Uniform, uniform 0.8 10000 No burr Uniform, uniform 0.8 15000 No burr Uniform, uniform 0.8 30000 No burr Uniform, uniform 0.8 35000 Almost without burrs Uniform, uniform 0.9 8000 No burr Uniform, uniform 0.9 10000 No burr Uniform, uniform 0.9 25000 No burr Uniform, uniform 0.9 30000 No burr Uniform, uniform 1.0 15000 Almost without burrs Uniform, uniform 1.0 20000 No burr Uniform, uniform 1.1 10
  • the first surface of the metal sheet has almost no burr with high quality, especially in the hardness of the auxiliary processing sheet is 0.8 ⁇ 1.2 of the hardness value of the metal sheet. Times, the first surface of the metal sheet is almost burr-free and uniform in appearance and higher in quality.
  • Hardness ratio of auxiliary processing sheet to metal sheet Bit speed Surface burr Hole appearance 0.7 8000 a small amount of burrs Uneven 0.7 10000 a small amount of burrs Uniform, uniform 0.7 25000 No burr Uniform, uniform 0.8 7000 Almost without burrs Uneven 0.8 8000 Almost without burrs Uniform, uniform 0.8 9000 Almost without burrs Uniform, uniform 0.8 10000 No burr Uniform, uniform 0.8 15000 No burr Uniform, uniform 0.8 30000 No burr Uniform, uniform 0.8 35000 Almost without burrs Uniform, uniform 0.9 8000 No burr Uniform, uniform 0.9 10000 No burr Uniform, uniform 0.9 25000 No burr Uniform, uniform 0.9 30000 No burr Uniform, uniform 1.0 15000 Almost without burrs Uniform, uniform 1.0 20000 No burr Uniform, uniform 1.1 10000 Almost without burrs Uniform, uniform 1.1 15000 No burr Uneven 1.2 10000 Almost without burrs Uniform, uniform

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Abstract

一种金属板材（12）上的制孔方法，包括以下步骤：提供一个金属板材（12）与一个辅助加工片（14），金属板材（12）具有待钻孔区域（122），待钻孔区域（122）具有第一表面（1222）及与第一表面（1222）相对的第二表面（1224），辅助加工片（14）的硬度值大于金属板材（12）的硬度值的0.7倍；将辅助加工片（14）贴合在待钻孔区域（122）的第一表面（1222）上，用钻头在辅助加工片（14）与待钻孔区域（122）钻孔，钻头在钻孔过程中的转速大于8000转/分钟，将辅助加工片（14）从待钻孔区域（122）取下。金属板材（12）上的制孔方法具有提高孔质量的优点。

Description

金属板材上的制孔方法 金属板材上的制孔方法
技术领域
本发明涉及一种金属加工方法，尤其是一种金属板材上的制孔方法。
背景技术
随着科技的发展，电子产品的使用，特别是便携式电子产品 ( 如笔记本电脑、平板电脑、移动电话、 MP3 播放器 ) 的使用已非常普遍。以前的便携式电子产品的外壳大都采用塑胶制成，然而随着人们对电子产品外观及耐用性要求的提升，产品的外壳越来越多用金属材料来制备。
用金属材料来制备金属板材时，常常需要在金属板材上形成孔，然而在金属板材上形成孔容易产生毛刺，这些毛刺若不去除则会影响到产品的外观及触感，特别是形成孔径较小的孔时更加难以去除毛刺。
中国专利 CN92100704.3 公开一种用于在印刷电路板钻孔过程中贴靠印刷电路板的复合引入板，其含有一种分布在一块构成引入板或形成其一个部分的非金属片的表面上的钻削润滑剂。中国专利 CN200810242920.9 公开一种印刷电路板的小孔径高密度钻孔方法，其适于加工直径为 0.35mm 以下的密集孔，主要步骤包括：对零位、设钻机参数、钻定位孔、上垫板、上基板、上铝片，钻孔、磨披峰、吹孔、检查。
然而，上述现有专利技术中的这些钻孔技术都是用于印刷电路板，而印刷电路板的材质主要是由高分子聚合物构成，例如主要是环氧树脂；环氧树脂的材质与金属材质的性质不同，因此难以将印刷电路板的钻孔技术直接应用到金属板材上，尤其是弯曲的金属板材上。
发明内容
本发明的目的在于提供一种易于提高孔质量的金属板材上的制孔方法。
一种金属板材上的制孔方法，其包括以下步骤：提供一个金属板材与一个辅助加工片，该金属板材具有待钻孔区域，该待钻孔区域具有第一表面及与该第一表面相对的第二表面，该辅助加工片的硬度值大于该金属板材的硬度值的 0.7 倍；将该辅助加工片贴合在该待钻孔区域的该第一表面上；用钻头在该辅助加工片与该待钻孔区域钻孔，该钻头在钻孔过程中的转速大于 8000 转 / 分钟；以及将该辅助加工片从该待钻孔区域取下。
另一种金属板材上形成孔的方法，其包括以下步骤：提供一个金属板材、一个第一辅助加工片及一个第二辅助加工片，该金属板材具有待钻孔区域，该待钻孔区域具有第一表面及与该第一表面相对的第二表面，该辅助第一辅助加工片与第二辅助加工片的硬度值分别为该金属板材硬度值的 0.8~1.2 倍；将该第一辅助加工片及该第二辅助加工片分别贴合在该待钻孔区域的该第一表面及该第二表面上；用钻头在该待钻孔区域钻孔，并使钻头依次穿透该第一辅助加工片、该金属板材及该第二辅助加工片以在该待钻孔区域形成通孔，该钻头在钻孔过程中的转速大于 8000 转 / 分钟；以及将该第一辅助加工片及第二辅助加工片从该待钻孔区域取下。
本发明的金属板材上的制孔方法中，采用辅助加工片的硬度值大于金属板材的硬度值的 0.7 倍，且辅助加工片贴合在待钻孔区域的第一表面，第一表面钻孔后所产生的毛刺可粘附在第一辅助加工片上，从而让钻孔过程中所形成的大部分甚至所有毛刺可通过辅助加工片直接带走，从而使毛刺易于消除且甚至可省略打磨等其他工艺，提高了孔质量，提升了金属板材的加工便利性与降低了加工成本。并且，本发明实施例的金属板材上的制孔方法中，钻头的转速大于 8000 转 / 分钟，这可确保钻孔形成的孔内壁平滑，更加美观。
附图说明
图 1 是本发明实施例的金属板材上的制孔方法的金属板材的俯视示意图。
图 2 是图 1 所示的金属板材沿 II-II' 线剖开的示意图。
图 3 是本发明实施例的金属板材上的制孔方法的过程中金属板材与辅助加工片贴合后准备钻孔时的示意图。
图 4 是本发明实施例的金属板材上的制孔方法的过程中钻孔后的示意图。
图 5 是本发明另一实施例的金属板材上的制孔方法的过程中金属板材、第一辅助加工片与第二辅助加工片贴合后准备钻孔时的示意图。
具体实施方式
下面将结合附图及实施例对本发明的金属板材上的制孔方法作进一步的详细说明。
请参见图 1 至图 4 ，本发明实施例的金属板材上的制孔方法包括以下步骤；首先是提供一种金属板材 12 与辅助加工片 14 ，其中金属板材 12 具有待钻孔区域 122 ，待钻孔区域 122 具有第一表面 1222 及与第一表面 1222 相对的第二表面 1224 ，辅助加工片 14 的硬度值大于金属板材 12 的硬度值的 0.7 倍；接着，将辅助加工片 14 贴合在待钻孔区域 122 的第一表面 1222 上；接着，用钻头 16 在辅助加工片 14 与待钻孔区域 122 钻孔，其中，钻头的转速大于 8000 转 / 分钟；以及，将辅助加工片 14 从待钻孔区域 122 取下，从而在第一表面 1222 上形成较少毛刺甚至无毛刺的孔 1226 。其中，本发明实施例的金属板材上的制孔方法中，所形成的孔 1226 的直径优选是 0.3 毫米至 3 毫米的小孔。
详细来说，金属板材 12 可为镁合金、铝合金、不锈钢或其他适合于电子产品使用的金属材料；待钻孔区域 122 的第一表面 1222 可用作外表面，第二表面 1224 可用作内表面。辅助加工片 14 可根据所采用的金属板材 12 来选择，选择的标准主要是使辅助加工片 14 的硬度与金属板材 12 相匹配，即使辅助加工片 14 的硬度值大于金属板材 12 的硬度值的 0.7 倍，优选是使辅助加工片 14 的硬度值为金属板材 12 的硬度值的 0.8~1.2 倍，更优选是使辅助加工片 14 的硬度值为金属板材 12 的硬度值的 0.8~1.1 倍，例如在本实施例中金属板材 12 与辅助加工片 14 分别是由铝合金制成。辅助加工片 14 的厚度优选是小于金属板材 12 的厚度，这样可以减少成本以及提升钻孔过程的操作性，优选地辅助加工片 14 的厚度为金属板材 12 在待钻孔区域 122 厚度的 0.05~0.15 倍。金属板材 12 的待钻孔区域 122 的第一表面 1222 可为弯曲面，具体在本实施例中，金属板材 12 是一块弯曲的板材；可以理解，本发明并不以此为限，在其他实施例中，金属板材 12 也可以是平板。辅助加工片 14 的弯曲曲率可以与第一表面 1222 的相同，这样有助于钻孔时的定位；可以理解，在另外的实施例中，让辅助加工片 14 与第一表面 1222 的接触面与第一表面 1222 具有相同或相近的曲率，就可使辅助加工片 14 与第一表面 1222 贴合紧密。
在将辅助加工片 14 贴合在待钻孔区域 122 的第一表面 1222 上时，为使辅助加工片 14 与第一表面 1222 贴合紧密，还可通过另外的固定件（图未示）将二者固定在一起。
在用钻头 16 在辅助加工片 14 与待钻孔区域 122 钻孔时，为确保形成的孔垂直于表面，可以先调整与钻头 16 相对于辅助加工片 14 与待钻孔区域 122 的位置，以使钻头 16 的轴线 162 与第一表面 1222 预定孔加工处中心点的切平面 1220 相垂直，如此可以防止所形成的孔 1226 变形，尤其是在第一表面 1222 为曲面时，可以确保所形成的孔 1226 均匀、统一，提升金属板材 12 的美观。调整钻头 16 相对于辅助加工片 14 与待钻孔区域 122 的位置可以采用安装在钻头 16 上的检测控制单元来实现，例如通过光线检测钻头 16 相对于辅助加工片 14 与待钻孔区域 122 的位置，然后再控制钻头 16 转动来调整相对位置。在本实施例中，为使形成的孔 1226 的内壁光滑与不变形，钻头的转速要大于 8000 转 / 分钟，优选是使钻头的转速为大于 10000 转 / 分钟。此外，在本实施例中，为确保钻孔时的稳定性，以及可以配合调整辅助加工片 14 与待钻孔区域 122 的位置，还提供了一个可转动的支撑平台 18 ，支撑平台 18 包括底座 182 及设置在底座 182 上的支撑部 184 。支撑平台 18 的支撑部 184 为可更换部件，这样容易使支撑平台 18 可以适用不同的金属板材 12 加工。支撑部 184 具有顶面 1842 及在顶面 1842 上形成的配合孔 1844 ，顶面 1842 的形状可与第二表面 1224 相对应，这样在将辅助加工片 14 与金属板材 12 放在其上钻孔时可以比较平稳；配合孔 1844 则与第一表面 1222 预定孔加工处相对应，以确保钻头 16 不会钻到支撑部 184 。
本发明实施例的金属板材上的制孔方法中，采用辅助加工片 14 的硬度值大于金属板材 12 的硬度值的 0.7 倍，且辅助加工片 14 贴合在待钻孔区域 122 的第一表面 1222 ，第一表面 1222 钻孔后所产生的毛刺可粘附在辅助加工片 14 上，从而让钻孔过程中所形成的大部分甚至所有毛刺可通过辅助加工片 14 直接带走，从而使毛刺易于消除且甚至可省略打磨等其他工艺，提高了金属板材 12 的加工便利性与降低了加工成本。并且，本发明实施例的金属板材上的制孔方法中，钻头的转速大于 8000 转 / 分钟，这可确保钻孔形成的孔 1226 内壁平滑与不变形，更加美观。特别的是，在加工弯曲的金属板材 12 过程中，若控制辅助加工片 14 的硬度值为金属板材 12 的硬度值的 0.8~1.1 倍以及钻头的转速为 10000~30000 转 / 分钟时，则不仅可以易于去除形成孔 1226 过程中所产生的毛刺，而且还可以使孔 1226 的具有更稳定的垂直度及内壁平滑度，从而让金属板材 12 具有更好的外观。
请参见图 5 ，本发明另一实施例的金属板材上的制孔方法，其与前述实施例相似，不同点在于本实施例中还提供了第二辅助加工片 28 。第二辅助加工片 28 贴合在金属板材 22 的待钻孔区域的第二表面 2224 上，而第一辅助加工片 24 仍贴合在金属板材 22 的待钻孔区域的第一表面 2222 上。这样，在以 8000~35000 转 / 分钟的转速钻通孔后在第二表面 2224 所产生的大部分甚至所有毛刺可粘附在第二辅助加工片 28 上，让第二辅助加工片 28 带走；从而不仅可使第一表面 2222 的毛刺易于去除也可使第二表面 2224 的毛刺易于去除 2 。详细来说，辅助第一辅助加工片 24 与第二辅助加工片 28 的硬度值可分别为金属板材 22 硬度值的 0.8~1.2 倍，金属板材 22 的待钻孔区域为弯曲状，第一辅助加工片 24 与第二辅助加工片 28 的形状与该待钻孔区域相匹配，并且在用钻头 26 钻孔前，优选先调整钻头 26 相对于第一辅助加工片 24 与该待钻孔区域的位置，以使钻头 26 的轴线与第一表面 2222 预定孔加工处中心点的切平面相垂直。此外，在本实施例中，还可使第一辅助加工片 24 靠近钻头 26 ，且第一辅助加工片 24 为金属材料制成，而第二辅助加工片 28 为塑料材料制成，这样可以降低成本。
具体实施例
采用本发明实施例的金属板材上形成孔的方法进行具体实验，其中金属板材的材质为铝合金，辅助加工片的材质为塑料，待钻孔区域为弯曲状，待钻孔区域的第一表面贴合辅助加工片，部分实验数据如下表所示：
辅助加工片与金属板材的硬度比 钻头的转速 表面的毛刺 孔的外观
0.4 10000 较多毛刺 不均匀
0.6 30000 少量毛刺 不均匀
0.7 8000 少量毛刺 不均匀
0.7 10000 少量毛刺 均匀、统一
0.7 25000 无毛刺 均匀、统一
0.8 6000 少量无毛刺 不均匀
0.8 7000 几乎无毛刺 不均匀
0.8 8000 几乎无毛刺 均匀、统一
0.8 9000 几乎无毛刺 均匀、统一
0.8 10000 无毛刺 均匀、统一
0.8 15000 无毛刺 均匀、统一
0.8 30000 无毛刺 均匀、统一
0.8 35000 几乎无毛刺 均匀、统一
0.9 8000 无毛刺 均匀、统一
0.9 10000 无毛刺 均匀、统一
0.9 25000 无毛刺 均匀、统一
0.9 30000 无毛刺 均匀、统一
1.0 15000 几乎无毛刺 均匀、统一
1.0 20000 无毛刺 均匀、统一
1.1 10000 几乎无毛刺 均匀、统一
1.1 15000 无毛刺 不均匀
1.2 10000 几乎无毛刺 均匀、统一
1.2 15000 几乎无毛刺 均匀、统一
1.3 10000 少量毛刺 统一
1.5 10000 少量毛刺 统一
从表中可以看出，当辅助加工片的硬度值大于金属板材的硬度值的 0.7 倍，且钻头的转速在大于 8000 转 / 分钟时，金属板材的第一表面几乎无毛刺具有较高质量，尤其是在辅助加工片的硬度值为金属板材的硬度值的 0.8~1.2 倍，金属板材的第一表面几乎无毛刺且外观均匀统一，质量更高。
采用本发明实施例的金属板材上形成孔的方法进行另一具体实验，其中金属板材的材质为铝合金，辅助加工片的材质为金属，待钻孔区域为弯曲状，待钻孔区域的第一表面与第二表面均贴合辅助加工片，部分实验数据如下表所示：
辅助加工片与金属板材的硬度比 钻头的转速 表面的毛刺 孔的外观
0.7 8000 少量毛刺 不均匀
0.7 10000 少量毛刺 均匀、统一
0.7 25000 无毛刺 均匀、统一
0.8 7000 几乎无毛刺 不均匀
0.8 8000 几乎无毛刺 均匀、统一
0.8 9000 几乎无毛刺 均匀、统一
0.8 10000 无毛刺 均匀、统一
0.8 15000 无毛刺 均匀、统一
0.8 30000 无毛刺 均匀、统一
0.8 35000 几乎无毛刺 均匀、统一
0.9 8000 无毛刺 均匀、统一
0.9 10000 无毛刺 均匀、统一
0.9 25000 无毛刺 均匀、统一
0.9 30000 无毛刺 均匀、统一
1.0 15000 几乎无毛刺 均匀、统一
1.0 20000 无毛刺 均匀、统一
1.1 10000 几乎无毛刺 均匀、统一
1.1 15000 无毛刺 不均匀
1.2 10000 几乎无毛刺 均匀、统一
1.2 15000 几乎无毛刺 均匀、统一
1.3 10000 少量毛刺 统一
从表中可以看出，当辅助加工片的硬度值大于金属板材的硬度值的 0.7 倍，且钻头的转速在大于 8000 转 / 分钟时，金属板材的表面几乎无毛刺具有较高质量，尤其是在辅助加工片的硬度值为金属板材的硬度值的 0.8~1.2 倍，金属板材的表面几乎无毛刺且外观均匀统一，质量更高。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容做出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (1)

1. 一种金属板材上的制孔方法，其包括以下步骤：
提供一个金属板材与一个辅助加工片，该金属板材具有待钻孔区域，该待钻孔区域具有第一表面及与该第一表面相对的第二表面，该辅助加工片的硬度值大于该金属板材的硬度值的 0.7 倍；
将该辅助加工片贴合在该待钻孔区域的该第一表面上；
用钻头在该辅助加工片与该待钻孔区域钻孔，该钻头在钻孔过程中的转速大于 8000 转 / 分钟；以及
将该辅助加工片从该待钻孔区域取下。
2. 如权利要求 1 所述的金属板材上的制孔方法，其特征在于：该辅助加工片的厚度为金属板材在待钻孔区域厚度的 0.05~0.15 倍，该辅助加工片的硬度值大于该金属板材硬度值的 0.9 倍且小于该金属板材硬度值的 1.1 倍，所形成孔的直径为 0.3 毫米至 3 毫米。
3. 如权利要求 1 所述的金属板材上的制孔方法，其特征在于：该金属板材与该辅助加工片分别由铝合金制成，且该辅助加工片的厚度小于该金属板材在钻孔区域的厚度。
4. 如权利要求 1 所述的金属板材上的制孔方法，其特征在于：该待钻孔区域的该第一表面为曲面，该辅助加工片与该第一表面贴合的面具有与该第一表面相同的曲率。
5. 如权利要求 4 所述的金属板材上的制孔方法，其特征在于：在用钻头在该辅助加工片与该待钻孔区域钻孔时，先调整与该钻头相对于该辅助加工片与该待钻孔区域的位置，以使该钻头的轴线与该第一表面预定孔加工处中心点的切平面相垂直。
6. 如权利要求 1 所述的金属板材上的制孔方法，其特征在于：还包括提供一个可转动的支撑平台，该金属板材与该辅助加工片固定在该可转动的支撑平台上。
7. 一种金属板材上的制孔方法，其包括以下步骤：
提供一个金属板材、一个第一辅助加工片及一个第二辅助加工片，该金属板材具有待钻孔区域，该待钻孔区域具有第一表面及与该第一表面相对的第二表面，该辅助第一辅助加工片与第二辅助加工片的硬度值分别为该金属板材硬度值的 0.8~1.2 倍；
将该第一辅助加工片及该第二辅助加工片分别贴合在该待钻孔区域的该第一表面及该第二表面上；
用钻头在该待钻孔区域钻孔，并使钻头依次穿透该第一辅助加工片、该金属板材及该第二辅助加工片以在该待钻孔区域形成通孔，该钻头在钻孔过程中的转速为 8000 转 / 分钟；以及
将该第一辅助加工片及第二辅助加工片从该待钻孔区域取下。
8. 如权利要求 7 所述的金属板材上的制孔方法，其特征在于：该第一辅助加工片由金属材料制成，该第二辅助加工片由塑料材料制成。
9. 如权利要求 8 所述的金属板材上的制孔方法，其特征在于：该待钻孔区域为弯曲状，该第一辅助加工片与该第二辅助加工片的形状与该待钻孔区域相匹配，在用钻头钻孔前，先调整该钻头相对于该第一辅助加工片与该待钻孔区域的位置，以使该钻头的轴线与该第一表面预定孔加工处中心点的切平面相垂直。
10. 如权利要求 7 所述的金属板材上的制孔方法，其特征在于：该第一及第二辅助加工片的厚度均为金属板材在待钻孔区域厚度的 0.05~0.15 倍，该第一及第二辅助加工片的硬度值均大于该金属板材硬度值的 0.9 倍且小于该金属板材硬度值的 1.1 倍，所形成孔的直径为 0.3 毫米至 3 毫米。
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