WO2013007091A1 - 通用型多刃尖钻 - Google Patents

通用型多刃尖钻 Download PDF

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Publication number
WO2013007091A1
WO2013007091A1 PCT/CN2011/084818 CN2011084818W WO2013007091A1 WO 2013007091 A1 WO2013007091 A1 WO 2013007091A1 CN 2011084818 W CN2011084818 W CN 2011084818W WO 2013007091 A1 WO2013007091 A1 WO 2013007091A1
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WO
WIPO (PCT)
Prior art keywords
edge
drill
blade
angle
tip
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PCT/CN2011/084818
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English (en)
French (fr)
Inventor
孙家宁
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NINGBO HUAREN TOOLS Co Ltd
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NINGBO HUAREN TOOLS Co Ltd
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Publication of WO2013007091A1 publication Critical patent/WO2013007091A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/08—Side or plan views of cutting edges
    • B23B2251/085—Discontinuous or interrupted cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges

Definitions

  • the utility model relates to a drilling tool, in particular to a universal multi-blade sharp drill.
  • Multi-edge sharp drill (ZL200820165519.5) discloses a multi-blade sharp drill with better centering ability than ordinary group drill, small axial resistance and sharp tip, but still has the following disadvantages:
  • the inner blade front angle of the multi-blade sharp drill can be controlled not to increase excessively, the actually generated inner blade front angle is 124° ⁇ 133 °, that is to say, there is still an increase, to a certain extent. It also limits the improvement of the centering ability.
  • the multi-blade sharp drill does not excessively increase the axial resistance, that is, the axial resistance still increases.
  • the drill tip of the multi-blade sharp drill is indented compared with the original twist drill tip, so that when drilling the thin wall material, the drilling hole is often completed before a tapered hole of sufficient size is formed.
  • the stability of the borehole on the thin plate or the round tube and the roundness of the hole are not ideal.
  • the multi-blade sharp drill with the inner blade edge angle of 124° ⁇ 133 ° is fashionable for hard metal materials such as drill steel, cast iron and stainless steel. However, when drilling aluminum, wood and plastic materials, the drill tip is used. Not enough for sharp drilling and guiding ability is weak, the hole drilled is easy to produce skew and not round.
  • the technical problem to be solved by the utility model is to provide a further improvement of the centering ability and further reduce the axial resistance, and is suitable for drilling holes on hard metal materials such as steel, cast iron and stainless steel, and is suitable for aluminum and wood. Drilling holes in soft materials such as plastics, general-purpose multi-blade drills that can drill holes in solid parts and drill holes in the surface of pipes and sheets.
  • the technical proposal of the present invention is to provide a universal multi-blade sharp drill having the following structure, which comprises a drill tip, a drill body connected to the drill tip, and a land provided on the outer wall of the drill, two of the drill tips
  • the main cutting edge includes an outer edge, a circular arc edge and an inner edge in order from the outer to the inner side, and the two inner edges are a transverse edge located at a central portion of the drill tip, and the outer edge intersects with the circular arc edge to form a chip tip.
  • the two sides of the chisel edge and the front surface of each inner edge form a drill tip
  • the inner blade has an inner blade edge angle of 108 ° to 128 °
  • the outer blade has an outer blade edge angle of 130 ° to 140 °
  • the inner edge of the inner blade has an oblique angle of 28 ° to 40 °.
  • the inner blade has a rake angle of 5 ° to 10 5 °.
  • the arc edge intersects the outer edge to form a chip tip having a sharp tip angle of 130 ° to 140 °.
  • the utility model of the utility model has the outer blade edge angle of 130 ° ⁇ 140 ° and the inner blade edge angle of 108 ° ⁇ 128 °, that is to say, the outer blade edge angle is larger than the inner blade edge angle, so that the utility model
  • the drill tip of the new universal multi-blade drill has no indentation compared with the original twist drill tip, so the universal multi-blade drill of the utility model has a tip-out and flat drill tip structure, which greatly improves the drill of the multi-blade sharp drill.
  • the centering ability and the stability of the drilling hole so that the roundness and axial straightness of the hole are good when the solid material is drilled, and the roundness of the hole is also good and not easy to be deflected when drilling the thin plate and the pipe.
  • the outer edge of the multi-blade sharp drill is 130 ° ⁇ 140 °. It is suitable for drilling on hard metal materials such as steel, cast iron and stainless steel, and the inner blade edge angle is 108 ° ⁇ 128 °. Drilling softer materials such as aluminum, wood and plastic requires sharp edges and good centering requirements. When the inner edge angle is 28 ° to 40 °, the inner blade is shortened. The maximum cutting speed is only for multi-blade sharp drills. One-third of the diameter, while maintaining sufficient strength when drilling steel materials, is a hard metal material such as steel, cast iron, stainless steel, and drilling holes in soft materials such as aluminum, wood and plastic. Achieving satisfactory results in improving efficiency and bit life.
  • the inner blade has an inner blade rake angle of 5 ° to + 5 °, which optimizes the inner blade rake angle to achieve a better overall effect, and reduces the cutting force to make the drilling lighter.
  • the arc edge intersects the outer edge to form a chip tip having a sharp tip angle of 130 ° to 140 °, and the symmetrical two-point tip of the drill rotates around the tip of the drill when drilling, like a double-stroke circle , greatly improving the stability of the drilling hole and reducing the yaw of the multi-blade sharp drill, reducing the friction between the land and the hole wall, not only making the drilling more brisk, but also avoiding uneven wear of the two main cutting edges, thereby Effectively improve the cutting life of multi-blade sharp drills.
  • Fig. 1 is a schematic view showing the shaft side structure of the universal multi-blade sharp drill of the present invention.
  • FIG. 2 is a schematic front view of the universal multi-blade sharp drill of the present invention.
  • Fig. 3 is a schematic top plan view of the universal multi-blade sharp drill of the present invention.
  • the figure shows: 1, drill tip, 11, outer edge, 12, arc edge, 13, inner edge, 14, chisel edge, 15, chip tip, 16, drill tip, 2, drill body, 3, the blade, the chip tip angle, 2 ⁇ , the inner edge angle, ⁇ , the inner edge angle, 2 ⁇ , the outer edge angle, ⁇ ⁇ , the inner blade front angle.
  • the universal multi-blade sharp drill of the present invention comprises a drill tip 1, a drill body 2 connected to the drill tip 1, and a land 3 provided on the outer wall of the drill body 2.
  • the two main cutting edges of the drill tip 1 include an outer edge 11, an arcuate edge 12 and an inner edge 13 in order from the outside to the inside. Between the two inner edges 13 is a chisel edge 14 located at the center of the drill tip 1.
  • the outer edge 11 and The arcuate edges 12 intersect to form a triangular pyramid-shaped dimple tip 15, that is to say the two outer edges 11 respectively intersect the associated arcuate edge 12 to form two triangular pyramid-shaped dimple tips 15, said transverse Both sides of the blade 14 and the front face of each inner blade 13 enclose a ridge tip 16 of a ridge shape.
  • the two chip tips 15, one drill tip 16 and seven cutting edges ie one chisel edge 14, two inner blades 13, two arc edges 12, two outer blades 11
  • the inner blade edge angle 2 ⁇ 1' of the inner blade 13 i.e., the angle between the two inner blades 13
  • the inner edge angle 2 ⁇ 1' is less than the prior art, further reducing the axial resistance of the borehole;
  • ⁇ is larger than the inner edge angle 2 ⁇ 1', so the universal multi-blade sharp drill of the utility model has the inner tip flat outer drill tip 1, and the utility model general-purpose multi-blade sharp drill drill tip 1 is shown in FIG.
  • the utility model Compared with the original twist drill tip (the original twist drill tip is the apex of the angle between the two outer edges 11 as shown in Figure 2), there is no indentation, that is to say, the utility model has a universal multi-blade drill tip and two The apex of the angle of the outer edge 11 coincides.
  • the above measures greatly improve the drilling centering ability and the stability of the drilling of the multi-blade sharp drill, so that the roundness and axial straightness of the hole are good when the solid material is drilled.
  • the inner blade is shortened so that the maximum cutting speed of the inner blade is only multi-blade.
  • the inner blade rake angle ⁇ - 5 ° to ten 5 ° of the inner blade 13 makes the inner blade 13 sharper and the borehole is more brittle.
  • the universal multi-blade drill of the utility model is ground on the basis of the original twist drill, that is to say, after the original twist drill is ground, the universal multi-blade drill of the utility model is produced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

本实用新型公开了一种通用型多刃尖钻，包括钻尖、与钻尖相连的钻体和设在钻体外壁的刃带，钻尖的两主切削刃由外向内依次包括外刃、圆弧刃和内刃，所述两内刃之间为位于钻尖中心部位的横刃，外刃与圆弧刃相交形成分屑尖，横刃的两侧面与每条内刃的前面围成一个钻顶尖，内刃的内刃锋角为108°～128°，外刃的外刃锋角为130°～140°，内刃的内刃斜角为28°～40°。该通用型多刃尖钻的定心能力得到了进一步提高，轴向阻力得到了进一步减少，适合在钢、铸铁和不锈钢一类较硬金属材料上钻孔，又适合在铝、木材、塑料一类较软材料上钻孔，既能在实体零件上钻孔，又能在管子和薄板表面钻孔。

Description

通用型多刃尖钻
技术领域
本实用新型涉及一种钻孔工具， 具体讲是一种通用型多刃尖钻。
背景技术
实用新型专利 《多刃尖钻》 （ZL200820165519.5 ) 公开了一种定心能力好于普通群钻、 轴向阻力小且钻尖锋利的多刃尖钻， 但仍存在以下缺点：
1、 所述多刃尖钻的内刃锋角虽然可控制不会过分增大， 但实际生成的内刃锋角则为 124° 〜133 ° ， 就是说仍有所增大， 在一定程度上还是限制了定心性能力的提高， 另外所 述多刃尖钻虽然也不致过分增大轴向阻力， 就是说轴向阻力仍有所增大。
2、 所述多刃尖钻的钻尖较原麻花钻钻尖缩进， 这样在钻薄壁材料时往往在尚未形成 一个足够大小的起定心作用的锥孔前钻孔就已结束， 致使在薄板或圆管上钻孔的稳定性和 孔的圆度均不理想。
3、 所述内刃锋角为 124° 〜133 ° 的多刃尖钻对钻钢、 铸铁、 不锈钢一类较硬金属材 料时尚可， 然而在钻铝、 木材、 塑料一类材料时由于钻尖不够锋利引钻和导向能力较弱， 所钻的孔易产生偏斜和不圆。
实用新型内容
本实用新型要解决的技术问题是， 提供一种定心能力得到进一步提高， 轴向阻力得 到进一步减少， 适合在钢、 铸铁和不锈钢一类较硬金属材料上钻孔， 又适合在铝、 木材、 塑料一类较软材料上钻孔， 既能在实体零件上钻孔， 又能在管子和薄板表面钻孔的通用型 多刃尖钻。
本实用新型的技术方案是， 提供一种具有以下结构的通用型多刃尖钻， 它包括钻尖、 与钻尖相连的钻体和设在钻体外壁的刃带， 所述钻尖的两主切削刃由外向内依次包括外 刃、 圆弧刃和内刃， 所述两内刃之间为位于钻尖中心部位的横刃， 所述外刃与圆弧刃相交 形成分屑尖， 所述横刃的两侧面与每条内刃的前面围成一个钻顶尖， 所述内刃的内刃锋角 为 108 ° 〜128 ° ， 所述外刃的外刃锋角为 130 ° 〜140 ° ， 所述内刃的内刃斜角为 28 ° 〜 40 ° 。
所述内刃的内刃前角为一 5 ° 〜十 5 ° 。
所述圆弧刃与外刃相交形成分屑尖的分屑尖角为 130 ° 〜140 ° 。
采用以上结构后， 本实用新型与现有技术相比具有以下优点： 1、 本实用新型通用型多刃尖钻的外刃锋角为 130 ° 〜140 ° ， 内刃锋角为 108 ° 〜128 ° ， 也就是说外刃锋角大于内刃锋角， 这样本实用新型通用型多刃尖钻的钻尖较原麻花钻 钻尖没有缩进， 故本实用新型通用型多刃尖钻拥有内尖外平的钻尖结构， 大大提高了多刃 尖钻的引钻定心能力和钻孔的稳定性， 因而在钻实体材料时孔的圆度和轴向直线性好， 在 薄板和管子上钻孔时孔的圆度也好且不易偏斜。
2、 所述多刃尖钻的外刃锋角为 130 ° 〜140 ° 适合于在钢、 铸铁和不锈钢一类较硬金 属材料上钻孔， 而内刃锋角为 108 ° 〜128 ° 兼顾了钻铝、木头和塑料一类较软材料需钻尖 锋利和定心好的要求，又内刃斜角取 28 ° 〜40 ° 时内刃缩短其承受的最大切削速度只为多 刃尖钻外径处的 1/3， 在钻钢铁材料时保持有足够的强度， 因而是一款在钢、 铸铁、 不锈 钢一类较硬金属材料以及在铝、 木头和塑料一类较软材料上钻孔都能达到提高效率和钻头 寿命的满意效果。
作为改进， 所述内刃的内刃前角为一 5 ° 〜+ 5 ° ， 使内刃前角优化达到更好的综合效 果， 降低了切削力使钻削轻快。
作为进一步改进， 所述圆弧刃与外刃相交形成分屑尖的分屑尖角为 130 ° 〜140 ° ， 钻 孔时对称的两分屑尖围绕钻顶尖旋转， 似一个双笔圆规画圆， 大大提高钻孔的稳定性和降 低了多刃尖钻的偏摆， 减小了刃带与孔壁的摩擦， 不仅使钻孔更加轻快， 并且避免了两主 切削刃的不均匀磨损， 从而有效提高了多刃尖钻的切削寿命。
附图说明
图 1为本实用新型的通用型多刃尖钻的轴侧结构示意图。
图 2为本实用新型的通用型多刃尖钻的主视结构示意图。
图 3为本实用新型的通用型多刃尖钻的俯视结构示意图。
本实用新型图中所示： 1、 钻尖， 11、 外刃， 12、 圆弧刃， 13、 内刃， 14、 横刃， 15、 分屑尖， 16、 钻顶尖， 2、 钻体， 3、 刃带， 、 分屑尖角， 2 Φ 、 内刃锋角， τ、 内 刃斜角， 2 Φ、 外刃锋角， Υ τ、 内刃前角。
具体实施方式
下面结合附图和具体实施方式对本实用新型作进一步说明。
如图 1至图 3所示， 本实用新型的通用型多刃尖钻， 包括钻尖 1、 与钻尖 1相连的钻 体 2和设在钻体 2外壁的刃带 3。 所述钻尖 1的两主切削刃由外向内依次包括外刃 11、 圆 弧刃 12和内刃 13。 所述两内刃 13之间为位于钻尖 1中心部位的横刃 14。 所述外刃 11与 圆弧刃 12相交形成一个三棱锥状的分屑尖 15，也就是说所述两外刃 11分别与相连的圆弧 刃 12相交分别形成两个三棱锥状的分屑尖 15， 所述横刃 14的两侧面与每条内刃 13的前 面围成一个屋脊形状的钻顶尖 16。 这样两个分屑尖 15、 一个钻顶尖 16和七条切削刃 （即 一条横刃 14、 两条内刃 13、 两条圆弧刃 12、 两条外刃 11) 构成 "三尖七刃" 的钻尖 1。
与现有技术不同的是， 所述内刃 13 的内刃锋角 2Φ1' (即两内刃 13的夹角） =108
° 〜128° ， 该内刃锋角 2Φ1' 比现有技术的度数更少， 进一步减小了钻孔的轴向阻力； 所述外刃 11的外刃锋角 2Φ (即两外刃 11的夹角） =130° 〜140° ， 也就是说外刃锋角 2
Φ大于内刃锋角 2Φ1' ， 故本实用新型的通用型多刃尖钻便拥有内尖外平的钻尖 1， 且如 图 2所示本实用新型通用型多刃尖钻的钻尖 1较原麻花钻钻尖 （原麻花钻钻尖为如图 2所 示的两外刃 11 的夹角的顶点） 没有缩进， 也就是说本实用新型通用型多刃尖钻的钻尖与 两外刃 11 的夹角的顶点重合， 以上措施大大提高了多刃尖钻的引钻定心能力和钻孔的稳 定性， 因而在钻实体材料时孔的圆度和轴向直线性好， 在薄板和管子上钻孔时孔的圆度也 好且不易偏斜； 所述内刃 13的内刃斜角 Γ (即内刃 13与外刃 11的夹角） =28° 〜40° 。 综上所述， 外刃锋角 2Φ=130° 〜140° 适合于在钢、铸铁和不锈钢一类较硬金属材料上钻 孔， 而内刃锋角 2Φ1' =108° 〜128° 兼顾了钻铝、 木头和塑料一类较软材料需钻尖锋利 和定心好的要求， 又内刃斜角 Γ=28° 〜40° 时内刃缩短使内刃承受的最大切削速度只为 多刃尖钻外径处的 1/3， 在钻钢铁材料时保持有足够的强度， 因而是一款在钢、 铸铁、 不 锈钢一类较硬金属材料以及在铝、 木头和塑料一类较软材料上钻孔都能达到提高效率和钻 头寿命的满意效果。 作为本实施例的改进方案， 所述内刃 13的内刃前角 γ =— 5° 〜十 5° ， 使内刃 13更 加锋利， 钻孔更加轻快。 所述圆弧刃 12与外刃 11相交形成分屑尖 15的分屑尖角 =130
° 〜140° ， 有利减小多刃尖钻的偏摆， 有效避免两主切削刃的不均匀磨损， 从而延长了 多刃尖钻的切削寿命。
本实用新型的通用型多刃尖钻是在原麻花钻的基础上修磨而成， 也就是说原麻花钻经 修磨后， 产生了本实用新型的通用型多刃尖钻。 经修磨而产生的本实用新型通用型多刃尖 钻的内刃锋角 2Φ1' =108° 〜128° 、 内刃斜角 77=28° 〜40° 、 内刃前角 Y r=_5。〜+5。， 而原麻花钻未修磨到的主切削刃则成为本实用新型通用型多刃尖钻的外刃 11，且外刃锋角
2Φ=130° 〜140° ， 该外刃锋角 2Φ=130° 〜140° 与原麻花钻的钻尖顶角保持一致。

Claims

权 利 要 求 书
1、 一种通用型多刃尖钻， 包括钻尖 （1)、 与钻尖 （1) 相连的钻体 （2) 和设在钻体 (2) 外壁的刃带 （3)， 所述钻尖 （1) 的两主切削刃由外向内依次包括外刃 （11)、 圆弧 刃 （12) 和内刃 （13)， 所述两内刃 （13) 之间为位于钻尖 （1) 中心部位的横刃 （14)， 所述外刃 （11) 与圆弧刃 （12) 相交形成分屑尖 （15)， 所述横刃 （14) 的两侧面与每条 内刃 （13) 的前面围成一个钻顶尖 （16)， 其特征在于： 所述内刃 （13) 的内刃锋角 （2Φ 1' ) 为 108° 〜128° ， 所述外刃 （11) 的外刃锋角 （2Φ) 为 130° 〜140° ， 所述内刃 (13) 的内刃斜角 （ Γ ) 为 28° 〜40° 。
2、 根据权利要求 1所述的通用型多刃尖钻， 其特征在于： 所述内刃 （13) 的内刃前 角 （ Y r) 为一 5° 〜十 5° 。
3、 根据权利要求 1所述的通用型多刃尖钻， 其特征在于： 所述圆弧刃 （12) 与外刃 (11) 相交形成分屑尖 （15) 的分屑尖角 （ ） 为 130° 〜140° 。
PCT/CN2011/084818 2011-07-11 2011-12-28 通用型多刃尖钻 Ceased WO2013007091A1 (zh)

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