WO2019019334A1 - 一种便于排屑的合金钻头 - Google Patents

一种便于排屑的合金钻头 Download PDF

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Publication number
WO2019019334A1
WO2019019334A1 PCT/CN2017/103068 CN2017103068W WO2019019334A1 WO 2019019334 A1 WO2019019334 A1 WO 2019019334A1 CN 2017103068 W CN2017103068 W CN 2017103068W WO 2019019334 A1 WO2019019334 A1 WO 2019019334A1
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WIPO (PCT)
Prior art keywords
cutting
alloy
drill bit
chip removal
groove
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PCT/CN2017/103068
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English (en)
French (fr)
Inventor
林昌方
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方大控股有限公司
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Publication date
Application filed by 方大控股有限公司 filed Critical 方大控股有限公司
Publication of WO2019019334A1 publication Critical patent/WO2019019334A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • 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

Definitions

  • the utility model relates to a hardware tool, in particular to an alloy drill bit which is convenient for chip removal, and is mainly used in the field of metal drill bits and the like.
  • the existing alloy drill bit is mainly composed of a drill pipe and an alloy cutter head.
  • the alloy cutter head needs to be welded at the end of the drill pipe, so that the alloy cutter head can be fast when the drill bit is working.
  • a welding groove is provided on the cutting portion, and the alloy cutter head is fixed in the welding groove. Since the cutting surface angle of the existing drill pipe cutting portion is not limited by the national standard, the cutting surface angle on the cutting portion of the existing alloy drill bit is produced according to foreign or customer requirements.
  • the angle of the cutting surface on the existing cutting portion is too large, the gap between the chip and the chip flute at the chip discharging portion becomes smaller, and the die bit is not timely in the working of the alloy bit, affecting the alloy bit.
  • the work efficiency; secondly, the scraps cut by the alloy cutter head can not be discharged in time, which will cause the cutting edge of the alloy cutter head and the drill rod to repeatedly rotate and rub the scraps, which will cause the temperature of the alloy cutter head to rise sharply. Thereby affecting the service life of the alloy drill bit.
  • the utility model provides an alloy drill bit which is convenient for chip removal, and the drill bit can not only quickly remove chips, but also improve the working efficiency of the alloy drill bit; at the same time, it can effectively reduce the working temperature of the alloy cutter head, thereby prolonging the service life of the alloy drill bit.
  • the technical solution adopted by the utility model is an alloy drill bit which is convenient for chip removal, and includes a drill pipe and an alloy cutter head mounted on the drill pipe, wherein
  • the drill rod includes a cutting portion and a chip discharging portion, the cutting portion is provided with a cutter head groove, and the chip discharging portion is provided with a spiral chip flute; and the cutter head groove of each of the cutting portions is respectively provided with a first a cutting face and a second cutting face, wherein the first cutting face and the second cutting face are respectively in communication with the spiral flute; the angle Aa of the first cutting face is 45° ⁇ 1°, the second cutting The angle Ab of the face is 67.5 ° ⁇ 1 °.
  • the thickness of the groove wall on the side of the cutting portion where the bit groove is close to the second cutting surface is 1 mm ⁇ 0.2 mm.
  • the depth of the cutter head groove is smaller than the height of the alloy cutter head by 0.2 mm to 1 mm.
  • the utility model has the beneficial effects that the angle between the first cutting surface and the second cutting surface on both sides of the cutting portion of the alloy drill bit is increased, so that the chip removing gap between the cutting face of the drill bit and the spiral chip flute is increased, and the cutting waste is cut. It can be quickly discharged through the spiral flutes to avoid repeated friction between the alloy cutter head and the cutting part in the hole to reduce the working efficiency and improve the working temperature of the alloy cutter head, effectively improving the working efficiency of the alloy drill bit. And service life.
  • FIG. 1 is a front view of an alloy cutter head for facilitating chip removal according to an embodiment of the present invention
  • the utility model relates to an alloy drill bit which is convenient for chip removal, comprising a drill pipe and an alloy cutter head mounted on the drill pipe, wherein the drill pipe comprises a cutting part 1 and a chip discharge.
  • a cutting portion 1 is provided with a cutter groove 3
  • the chip discharging portion 2 is provided with a spiral chip flute 4;
  • a first cutting surface 5 is provided on each side of the cutting groove 3 of the cutting portion 1 and a second cutting surface 6, the first cutting surface 5 and the second cutting surface 6 are respectively connected to the spiral flutes 4;
  • the angle Aa of the first cutting surface 5 is 45 ° ⁇ 1 °
  • the second The angle Ab of the cutting face 6 is 67.5 ° ⁇ 1 °.
  • the embodiment of the present embodiment is an optimum angle value obtained by a technician of the company through continuous experiments, and is a preferred embodiment.
  • the thickness of the groove wall L on the side of the cutting portion 1 where the bit groove 3 is close to the second cutting surface 6 is 1mm ⁇ 0.2mm; by controlling the thickness of the groove wall L of the cutter head groove 3 on the side close to the second cutting surface 6, so as to further increase the gap between the cutting portion 1 and the spiral flute 4, during the drilling process of the drill bit, waste The chips can be quickly discharged through the spiral flutes 4, thereby effectively improving the drilling efficiency of the alloy drill bit and reducing the working temperature of the alloy cutter head to prolong the service life.
  • the depth of the cutter head groove 3 is less than the height of the alloy cutter head by 0.2 mm to 1 mm; and the alloy cutter is adjusted by reducing the depth of the cutter head groove 3.
  • the exposed height of the head not only ensures the cutting benefit when punching, but also maximizes the service life of the alloy drill bit; the specific height can be customized according to the specifications of the drill bit or the customer's requirements, but the cutter head groove A depth of less than 0.2 mm to 1 mm is a preferred embodiment of the present invention.

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

Abstract

一种便于排屑的合金钻头，包括有钻杆和安装在钻杆上的合金刀头。钻杆包括有切削部（1）和排屑部（2），切削部上设有刀头槽（3），排屑部上设有螺旋排屑槽（4）；在切削部的刀头槽两侧分别设有第一切削面（5）和第二切削面（6），第一切削面和第二切削面分别与螺旋排屑槽相连通；第一切削面的角度Aa为45°±1°，第二切削面的角度Ab为67.5°±1°。上述合金钻头将切削部两侧的第一切削面和第二切削面的角度加大，这就相对增加了钻头切削面与螺旋排屑槽的排屑间隙，切削废屑可快速的通过螺旋排屑槽排出，避免废屑对合金刀头和切削部进行重复摩擦而降低工作效益和提升合金刀头的工作温度。上述钻头有效提高了合金钻头的工作效益和使用寿命。

Description

一种便于排屑的合金钻头 技术领域
本实用新型涉及一种五金工具，更具体的说是涉及一种便于排屑的合金钻头，主要应用于五金钻头等领域。
背景技术
现有的合金钻头主要由钻杆和合金刀头组成，为了提高钻头的切削性能和使用寿命，合金刀头需要焊接在钻杆的端部，这样当钻头在工作时，合金刀头可快速的在工作面上进行切削作业。现有的钻杆卡接部、排屑部及切削部，切削部上设有焊接槽，合金刀头固定在焊接槽内。由于现有的钻杆切削部的切削面角度没有国家标准予以限定，所以现有合金钻头钻杆切削部上的切削面角度都是依据国外或客户要求而进行生产的。而由于现有的切削部上的切削面角度过大，导致其与排屑部的排屑槽口处排屑间隔就变小了，造成合金钻头在工作时，排屑不及时，影响合金钻头的工作效益；其次，合金刀头切削下来的废屑不能及时排出，会引起合金刀头和钻杆的切削部重复的与废屑进行旋转摩擦，这样会使合金刀头的温度急剧升高，从而影响合金钻头的使用寿命。
实用新型内容
为了解决现有的合金钻头的切屑部切削面角度较大，导致排屑槽口的排屑间隔变小，造成排屑不及时，影响合金钻头的工作效益和合金钻头的使用寿命等技术问题，本实用新型提供一种便于排屑的合金钻头，该钻头不仅可快速排屑，提高合金钻头的工作效益；同时，还可有效降低合金刀头的工作温度，从而延长合金钻头的使用寿命。
为解决以上技术问题，本实用新型采取的技术方案是一种便于排屑的合金钻头，包括有钻杆及安装在钻杆上的合金刀头，其特征在于 所述的钻杆包括有切削部和排屑部，切削部上设有刀头槽，排屑部上设有螺旋排屑槽；在所述的切削部的刀头槽两侧分别设有第一切削面和第二切削面，第一切削面和第二切削面分别与螺旋排屑槽相连通；所述的第一切削面的角度Aa为45°±1°，所述的第二切削面的角度Ab为67.5°±1°。
进一步，在所述的切削部上刀头槽靠近第二切削面的一侧槽壁厚度为1mm±0.2mm。
进一步，所述的刀头槽的深度小于合金刀头高度0.2mm～1mm。
本实用新型的有益效果是将合金钻头切削部两侧的第一切削面和第二切削面的角度加大，这样相对就增加了钻头切削面与螺旋排屑槽的排屑间隙，切削废屑可快速的通过螺旋排屑槽排出孔外，避免废屑在孔内对合金刀头和切削部进行重复的摩擦而降低工作效益和提升合金刀头的工作温度，有效提高了合金钻头的工作效益和使用寿命。
附图说明
图1为本实用新型实施例一种便于排屑的合金刀头的主视图
具体实施方式
下面结合附图对本实用新型实施方式作进一步说明：
如图1所示，本实用新型为一种便于排屑的合金钻头，包括有钻杆及安装在钻杆上的合金刀头，其特征在于所述的钻杆包括有切削部1和排屑部2，切削部1上设有刀头槽3，排屑部2上设有螺旋排屑槽4；在所述的切削部1的刀头槽3两侧分别设有第一切削面5和第二切削面6，第一切削面5和第二切削面6分别与螺旋排屑槽4相连通；所述的第一切削面5的角度Aa为45°±1°，所述的第二切削面6的角度Ab为67.5°±1°。将合金钻头切削部1两侧的第一切削面5和第二切削面6的角度加大，这样相对就增加了钻头切削部1 与螺旋排屑槽4的排屑间隙，切削废屑可快速的通过螺旋排屑槽4排出孔外，避免废屑在孔内对合金刀头和切削部1进行重复的摩擦而降低工作效益和提升合金刀头的工作温度，有效提高了合金钻头的工作效益和使用寿命；当然，第一切削角5和第二切削角6也可根据客户的要求进行定制；或者设置更小或更大的角度，如设置更小的角度，无形中缩小了切削部1与螺旋排屑槽4之间的间隙，废屑就无法快速的排出孔外；而如果设置更大角度，虽然可便于快速的排出废屑，但会影响切削部1的强度，易造成切削部1断裂，因此，本实施例的实施方式是本公司的技术人员通过不断的实验而取得的最优角度值，为优选实施方式。
在本实施例中，为了进一步加大切削部1与螺旋排屑槽4之间的间隙，在所述的切削部1上刀头槽3靠近第二切削面6的一侧槽壁L厚度为1mm±0.2mm；通过控制刀头槽3靠近第二切削面6一侧的槽壁L厚度，这样相对的进一步提升切削部1与螺旋排屑槽4的间隙，在钻头打孔过程中，废屑就能更快的通过螺旋排屑槽4排出孔外，从而有效提升合金钻头的打孔效益和降低合金刀头的工作温度延长使用寿命。
在本实施例中，为了提升合金钻头的打孔效益和延长使用寿命，所述的刀头槽3的深度小于合金刀头高度0.2mm～1mm；通过降低刀头槽3的深度来调整合金刀头的露出高度，这样不仅可保证打孔时的切削效益，同时，还可最大程度的延长合金钻头的使用寿命；具体的高度可根据钻头的规格或客户的要求进行定制，但刀头槽的深度小于0.2mm～1mm为本实用新型的优选实施方式。
上述实施例不应视为对本实用新型的限制，但任何基于本实用新型的精神所作的改进，都应在本实用新型的保护范围之内。

Claims (3)

  1. 一种便于排屑的合金钻头，包括有钻杆及安装在钻杆上的合金刀头，其特征在于所述的钻杆包括有切削部和排屑部，切削部上设有刀头槽，排屑部上设有螺旋排屑槽；在所述的切削部的刀头槽两侧分别设有第一切削面和第二切削面，第一切削面和第二切削面分别与螺旋排屑槽相连通；所述的第一切削面的角度Aa为45°±1°，所述的第二切削面的角度Ab为67.5°±1°。
  2. 根据权利要求1所述的一种便于排屑的合金钻头，其特征在于在所述的切削部上刀头槽靠近第二切削面的一侧槽壁厚度为1mm±0.2mm。
  3. 根据权利要求1或2所述的一种便于排屑的合金钻头，其特征在于所述的刀头槽的深度小于合金刀头高度0.2mm～1mm。
PCT/CN2017/103068 2017-07-24 2017-09-25 一种便于排屑的合金钻头 WO2019019334A1 (zh)

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EP4059643A1 (en) 2021-03-18 2022-09-21 Black & Decker Inc. One-piece cutting head for a drill bit

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WO2011139960A1 (en) * 2010-05-04 2011-11-10 Illinois Tool Works Inc. Drill bit, device for producing and method for producing a drill bit
CN102834211A (zh) * 2009-12-03 2012-12-19 鲍尔钻孔公司 旋转式钻具
CN103084629A (zh) * 2013-02-01 2013-05-08 周安善 主切削刃分段、刃口高度不对称的麻花钻
CN203265714U (zh) * 2013-05-28 2013-11-06 尖点科技股份有限公司 电路板用的鱼尾型钻针

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Publication number Priority date Publication date Assignee Title
CN2030121U (zh) * 1988-05-10 1989-01-04 西安石油学院 四刃带麻花钻头
CN2095724U (zh) * 1990-10-22 1992-02-12 西安石油学院 不对称容屑槽麻花钻
CN201455362U (zh) * 2008-11-02 2010-05-12 周安善 立铣刀状外刃,外刃锋角200°,外刃外侧r形刃的多刃尖薄板麻花钻
CN102834211A (zh) * 2009-12-03 2012-12-19 鲍尔钻孔公司 旋转式钻具
WO2011139960A1 (en) * 2010-05-04 2011-11-10 Illinois Tool Works Inc. Drill bit, device for producing and method for producing a drill bit
CN103084629A (zh) * 2013-02-01 2013-05-08 周安善 主切削刃分段、刃口高度不对称的麻花钻
CN203265714U (zh) * 2013-05-28 2013-11-06 尖点科技股份有限公司 电路板用的鱼尾型钻针

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