WO2021073023A1 - Core-diameter-variable and tooth-pitch-variable tapered four-edge milling cutter - Google Patents

Core-diameter-variable and tooth-pitch-variable tapered four-edge milling cutter Download PDF

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Publication number
WO2021073023A1
WO2021073023A1 PCT/CN2020/076441 CN2020076441W WO2021073023A1 WO 2021073023 A1 WO2021073023 A1 WO 2021073023A1 CN 2020076441 W CN2020076441 W CN 2020076441W WO 2021073023 A1 WO2021073023 A1 WO 2021073023A1
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WO
WIPO (PCT)
Prior art keywords
milling cutter
variable
tapered
angle
tooth
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PCT/CN2020/076441
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French (fr)
Chinese (zh)
Inventor
周宏根
李国超
田桂中
赵健智
何强
孙丽
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江苏科技大学
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Publication of WO2021073023A1 publication Critical patent/WO2021073023A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C5/00Milling-cutters
    • B23C5/02Milling-cutters characterised by the shape of the cutter
    • B23C5/10Shank-type cutters, i.e. with an integral shaft
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C2210/00Details of milling cutters
    • B23C2210/04Angles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C2210/00Details of milling cutters
    • B23C2210/20Number of cutting edges
    • B23C2210/203Number of cutting edges four
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C2210/00Details of milling cutters
    • B23C2210/24Overall form of the milling cutter

Definitions

  • the invention relates to a milling cutter, and more specifically, to a tapered four-blade milling cutter with variable core diameter and tooth pitch.
  • Milling is a very important processing method in the field of mechanical processing, and the milling cutter is the main tool during processing.
  • the main cutting part of the end mill is mainly composed of the cutting edge and the chip pocket.
  • the peripheral edge of the milling cutter and the chip pocket of the milling cutter are prone to stress concentration during the machining process. Excessive stress concentration will increase the wear of the tool. Speed up tool wear and reduce tool life, which in turn affects the surface quality of processed products.
  • the cutter may vibrate during the machining process.
  • Vibration will cause uneven cutting of the peripheral edge of the end mill, and at the same time cause the cutting and spreading amount to increase than the original value, which affects the machining accuracy and tool life.
  • traditional end mills have poor chip interruption ability during the milling process, which will produce longer chips that are not easy to break, which will cause chip blockage at the chip pockets of the tool, and during the milling process, due to the chips and the tool chip
  • the friction effect between the grooves will cause the surface temperature of the tool to increase, reducing the cutting performance and service life of the tool.
  • the object of the present invention is to provide a tapered four-flute milling cutter with variable core diameter and tooth pitch, which has less wear, high service life, high stability during cutting, and does not generate chips during cutting.
  • the phenomenon of clogging and the friction between the chip and the chip flute of the tool heats up.
  • the present invention discloses a tapered four-blade milling cutter with variable core diameter and tooth pitch, which includes a milling cutter body, a milling cutter rake face, a milling cutter peripheral flank face, a chip flute, and a cooling area of the milling cutter
  • the main body of the milling cutter is provided with four side cutting edges and four bottom cutting edges, and the difference between the large inter-tooth angle ⁇ 1 of the milling cutter and the small inter-tooth angle ⁇ 2 of the milling cutter is 35° ⁇ 45°.
  • the core diameter of the main body of the milling cutter varies from 0 to 0.4mm, and within this range, the stress concentration and deformation at the tool tip are significantly improved.
  • the large inter-tooth angle ⁇ 1 110 ⁇ 2.5°
  • the small inter-tooth angle ⁇ 2 70 ⁇ 2.5°.
  • the rake face of the milling cutter is provided with a wave angle, and the wave angle radian is 0.5 to 1°.
  • the wave angle within the radian range can meet the chip breaking requirements without destroying the surface roughness of the machined.
  • flank face of the peripheral edge of the milling cutter is provided with a heat dissipation channel, and the heat dissipation channel is serrated.
  • the present invention has less wear and high service life; 2. High stability during cutting; 3. No chip clogging during cutting; 4. No friction between chips and chip pockets of the tool Heat up.
  • Figure 1 is a schematic diagram of the structure of the present invention
  • FIG. 2 is a schematic diagram of the cross-sectional structure of the present invention.
  • Figure 3 is a schematic diagram of the variable core diameter structure of the main body of the milling cutter
  • Figure 4 is a partial enlarged view of the rake face of the milling cutter
  • Figure 5 is a partial enlarged view of the flank of the peripheral edge of the milling cutter.
  • the helix angle of the milling cutter is 43°, and the taper angle of the milling cutter is 2°.
  • the variable core diameter structure of the milling cutter body is shown in Figure 3. The core diameter gradually increases from 5mm to 5.4mm.
  • Figure 4 is the rake face of the milling cutter, that is, the partial enlarged view at A in Figure 2
  • Figure 5 is the flank face of the milling cutter's peripheral edge, that is, the partial enlarged view at B in Figure 2, as shown in Figures 4 and 5,
  • the rake face 2 is provided with a wave angle of 0.5° in arc
  • the flank face 3 of the peripheral edge of the milling cutter is provided with a serrated milling cutter heat dissipation area 5 with a depth of 0.2 mm.
  • variable core diameter structure of the present invention When in use, due to the variable core diameter structure of the present invention, the stress concentration of the peripheral edge of the milling cutter and the chip flutes of the milling cutter is reduced, and the overall life of the tool is improved.
  • the variable tooth pitch structure improves the stability of the tool during cutting. ;
  • the wave angle at the 2 rake face of the milling cutter effectively improves the chip breaking ability of the tool.
  • the heat dissipation channel at the 3 flank face of the milling cutter reduces the cutting heat during the milling process of the tool and improves the cutting performance of the tool.

Abstract

Disclosed is a core-diameter-variable and tooth-pitch-variable tapered four-edge milling cutter, comprising a milling cutter main body (1), a milling cutter rake face (2), a milling cutter peripheral edge flank face (3), a chip pocket (4), a milling cutter heat dissipation area (5), and a cutter rake face wave angle, wherein four side cutting edges and four bottom cutting edges are arranged on the milling cutter main body (1), and a difference of 35° to 45° is formed between a milling cutter large intertooth angle α1 and a milling cutter small intertooth angle α2. The core-diameter-variable and tooth-pitch-variable tapered four-edge milling cutter is low in terms of abrasion loss, long in terms of service life and high in terms of cutting process stability, chip blockage cannot be caused in the cutting process, and it is not easy to cause friction heating between chips and the chip pocket of cutter.

Description

一种变芯径变齿距的锥形四刃铣刀Tapered four-blade milling cutter with variable core diameter and tooth pitch 技术领域Technical field
本发明涉及一种铣刀,更具体地,涉及一种变芯径变齿距的锥形四刃铣刀。The invention relates to a milling cutter, and more specifically, to a tapered four-blade milling cutter with variable core diameter and tooth pitch.
背景技术Background technique
铣加工在机械加工领域是非常重要的加工方法,铣刀则是加工时的主要工具,在铣加工过程中铣刀的耐用度和加工表面质量等方面都与铣刀结构有直接关系。立铣刀主要切削部分主要由切削刃以及容屑槽两部分组成,但加工过程中铣刀周刃和铣刀容屑槽部分易产生应力集中现象,过大的应力集中会使得刀具磨损加剧,加快刀具的磨损,降低刀具使用寿命,进而影响了加工产品的表面质量。同时,由于铣刀与刀夹之间存在微小间隙,所以在加工过程中刀具有可能出现振动现象。振动会使立铣刀圆周刃的吃刀量不均匀,同时导致切扩量比原定值增大,影响加工精度和刀具使用寿命。同时传统的立铣刀在铣削过程中断屑能力差,会产生较长的切屑发生切屑不易断裂的现象,使刀具容屑槽处产生切屑堵塞的现象,并且铣削过程中,由于切屑与刀具容屑槽间的摩擦效应会导致刀具的表面温度增加,降低刀具的切削性能以及使用寿命。Milling is a very important processing method in the field of mechanical processing, and the milling cutter is the main tool during processing. In the milling process, the durability of the milling cutter and the surface quality of the processing are directly related to the structure of the milling cutter. The main cutting part of the end mill is mainly composed of the cutting edge and the chip pocket. However, the peripheral edge of the milling cutter and the chip pocket of the milling cutter are prone to stress concentration during the machining process. Excessive stress concentration will increase the wear of the tool. Speed up tool wear and reduce tool life, which in turn affects the surface quality of processed products. At the same time, due to the tiny gap between the milling cutter and the tool holder, the cutter may vibrate during the machining process. Vibration will cause uneven cutting of the peripheral edge of the end mill, and at the same time cause the cutting and spreading amount to increase than the original value, which affects the machining accuracy and tool life. At the same time, traditional end mills have poor chip interruption ability during the milling process, which will produce longer chips that are not easy to break, which will cause chip blockage at the chip pockets of the tool, and during the milling process, due to the chips and the tool chip The friction effect between the grooves will cause the surface temperature of the tool to increase, reducing the cutting performance and service life of the tool.
发明内容Summary of the invention
发明目的:本发明的目的是提供一种变芯径变齿距的锥形四刃铣刀,该铣刀磨损量少、使用寿命高、切削过程中稳定性高,在切削过程中不产生切屑堵塞的现象以及切屑与刀具容屑槽间的摩擦起热现象。Object of the invention: The object of the present invention is to provide a tapered four-flute milling cutter with variable core diameter and tooth pitch, which has less wear, high service life, high stability during cutting, and does not generate chips during cutting. The phenomenon of clogging and the friction between the chip and the chip flute of the tool heats up.
技术方案:本发明公开了一种变芯径变齿距的锥形四刃铣刀,包括铣刀主体、铣刀前刀面、铣刀周刃后刀面、容屑槽、铣刀散热区域以及刀具前刀面波角,铣刀主体上设有四个侧切削刃和四个底切削刃,铣刀大齿间角α 1和铣刀小齿间角α 2相差35°~45°。 Technical scheme: The present invention discloses a tapered four-blade milling cutter with variable core diameter and tooth pitch, which includes a milling cutter body, a milling cutter rake face, a milling cutter peripheral flank face, a chip flute, and a cooling area of the milling cutter As well as the wave angle of the tool rake face, the main body of the milling cutter is provided with four side cutting edges and four bottom cutting edges, and the difference between the large inter-tooth angle α 1 of the milling cutter and the small inter-tooth angle α 2 of the milling cutter is 35°~45°.
其中,铣刀主体芯径变化范围为0~0.4mm,在此范围内刀尖处应力集中和变形现象得到明显改善。Among them, the core diameter of the main body of the milling cutter varies from 0 to 0.4mm, and within this range, the stress concentration and deformation at the tool tip are significantly improved.
其中,大齿间角α 1=110±2.5°、小齿间角α 2=70±2.5°。 Among them, the large inter-tooth angle α 1 =110±2.5°, and the small inter-tooth angle α 2 =70±2.5°.
其中,铣刀前刀面设有波角,波角弧度为0.5~1°,该弧度范围内的波角能够满足断屑要求的同时不破坏加工表面粗糙度。Among them, the rake face of the milling cutter is provided with a wave angle, and the wave angle radian is 0.5 to 1°. The wave angle within the radian range can meet the chip breaking requirements without destroying the surface roughness of the machined.
其中,铣刀周刃后刀面设有散热通道,该散热通道为锯齿状。Wherein, the flank face of the peripheral edge of the milling cutter is provided with a heat dissipation channel, and the heat dissipation channel is serrated.
有益效果:1、本发明磨损量少、使用寿命高;2、切削过程中稳定性高;3、在切削过程中不产生切屑堵塞的现象;4、不产生切屑与刀具容屑槽间的摩擦起 热现象。Beneficial effects: 1. The present invention has less wear and high service life; 2. High stability during cutting; 3. No chip clogging during cutting; 4. No friction between chips and chip pockets of the tool Heat up.
附图说明Description of the drawings
图1是本发明的结构示意图;Figure 1 is a schematic diagram of the structure of the present invention;
图2是本发明截面结构示意图;2 is a schematic diagram of the cross-sectional structure of the present invention;
图3是铣刀主体变芯径结构的示意图;Figure 3 is a schematic diagram of the variable core diameter structure of the main body of the milling cutter;
图4是铣刀前刀面局部放大视图;Figure 4 is a partial enlarged view of the rake face of the milling cutter;
图5是铣刀周刃后刀面局部放大视图。Figure 5 is a partial enlarged view of the flank of the peripheral edge of the milling cutter.
具体实施方式Detailed ways
如图1、图2所示,变芯径变齿距的锥形四刃铣刀,包括立铣刀主体1,铣刀前刀面2,铣刀周刃后刀面3,铣刀大齿间角α 1=110°,铣刀小齿间角α 2=70°、变芯径的容屑槽4,铣刀散热区域5,该铣刀的螺旋角为43°,铣刀锥角为2°。铣刀主体变芯径结构的如图3所示,芯径由5mm变化为5.4mm逐渐增加。图4为铣刀前刀面,即图2中A处局部放大视图,图5为铣刀周刃后刀面,即图2中B处局部放大视图,如图4、图5所示,铣刀前刀面2设置有弧度为0.5°的波角,铣刀周刃后刀面3设有深度为0.2mm的锯齿状铣刀散热区域5。 As shown in Figure 1 and Figure 2, the tapered four-blade milling cutter with variable core diameter and tooth pitch includes end mill main body 1, milling cutter rake face 2, milling cutter peripheral flank face 3, and milling cutter large teeth Interval angle α 1 =110°, milling cutter small teeth angle α 2 =70°, variable core diameter chip flute 4, milling cutter heat dissipation area 5. The helix angle of the milling cutter is 43°, and the taper angle of the milling cutter is 2°. The variable core diameter structure of the milling cutter body is shown in Figure 3. The core diameter gradually increases from 5mm to 5.4mm. Figure 4 is the rake face of the milling cutter, that is, the partial enlarged view at A in Figure 2, and Figure 5 is the flank face of the milling cutter's peripheral edge, that is, the partial enlarged view at B in Figure 2, as shown in Figures 4 and 5, The rake face 2 is provided with a wave angle of 0.5° in arc, and the flank face 3 of the peripheral edge of the milling cutter is provided with a serrated milling cutter heat dissipation area 5 with a depth of 0.2 mm.
在使用时,本发明由于变芯径结构减小了铣刀周刃和铣刀容屑槽4部分的应力集中现象,提高刀具的整体寿命,变齿距结构提高了刀具切削过程中的稳定性;铣刀前刀面2处的波角有效地提高刀具断屑能力,铣刀周刃后刀面3处的散热通道降低了刀具铣削过程中的切削热,提高了刀具的切削性能。When in use, due to the variable core diameter structure of the present invention, the stress concentration of the peripheral edge of the milling cutter and the chip flutes of the milling cutter is reduced, and the overall life of the tool is improved. The variable tooth pitch structure improves the stability of the tool during cutting. ; The wave angle at the 2 rake face of the milling cutter effectively improves the chip breaking ability of the tool. The heat dissipation channel at the 3 flank face of the milling cutter reduces the cutting heat during the milling process of the tool and improves the cutting performance of the tool.
.

Claims (7)

  1. 一种变芯径变齿距的锥形四刃铣刀,其特征在于,包括铣刀主体(1)、铣刀前刀面(2)、铣刀周刃后刀面(3)、容屑槽(4)、铣刀散热区域(5)以及刀具前刀面波角,所述铣刀主体(1)上设有四个侧切削刃和四个底切削刃,铣刀大齿间角α 1和铣刀小齿间角α 2相差35°~45°。 A tapered four-blade milling cutter with variable core diameter and tooth pitch, which is characterized in that it comprises a milling cutter body (1), a milling cutter rake face (2), a milling cutter peripheral flank face (3), and a chip The groove (4), the heat dissipation area (5) of the milling cutter and the wave angle of the tool rake face. The main body (1) of the milling cutter is provided with four side cutting edges and four bottom cutting edges. The milling cutter has a large intertooth angle α The difference between 1 and the angle α 2 between the small teeth of the milling cutter is 35°~45°.
  2. 根据权利要求1所述的变芯径变齿距的锥形四刃铣刀,其特征在于,所述铣刀主体(1)芯径变化范围为0~0.4mm。The tapered four-blade milling cutter with variable core diameter and tooth pitch according to claim 1, wherein the core diameter of the milling cutter body (1) varies from 0 to 0.4 mm.
  3. 根据权利要求1所述的变芯径变齿距的锥形四刃铣刀,其特征在于,所述大齿间角α 1=110±2.5°、小齿间角α 2=70±2.5°。 The tapered four-blade milling cutter with variable core diameter and tooth pitch according to claim 1, wherein the large inter-tooth angle α 1 =110±2.5°, and the small inter- tooth angle α 2 =70±2.5° .
  4. 根据权利要求1所述的变芯径变齿距的锥形四刃铣刀,其特征在于,所述铣刀前刀面(2)设有波角。The tapered four-blade milling cutter with variable core diameter and tooth pitch according to claim 1, wherein the rake face (2) of the milling cutter is provided with a wave angle.
  5. 根据权利要求4所述的变芯径变齿距的锥形四刃铣刀,其特征在于,所述波角弧度为0.5~1°。The tapered four-blade milling cutter with variable core diameter and tooth pitch according to claim 4, wherein the wave angle radian is 0.5 to 1°.
  6. 根据权利要求1所述的变芯径变齿距的锥形四刃铣刀,其特征在于,所述铣刀周刃后刀面(3)设有散热通道。The tapered four-blade milling cutter with variable core diameter and tooth pitch according to claim 1, wherein the flank surface (3) of the peripheral edge of the milling cutter is provided with a heat dissipation channel.
  7. 根据权利要求6所述的变芯径变齿距的锥形四刃铣刀,其特征在于,所述散热通道为锯齿状。The tapered four-blade milling cutter with variable core diameter and tooth pitch according to claim 6, wherein the heat dissipation channel is in a sawtooth shape.
PCT/CN2020/076441 2019-10-16 2020-02-24 Core-diameter-variable and tooth-pitch-variable tapered four-edge milling cutter WO2021073023A1 (en)

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CN201910983769.2 2019-10-16
CN201910983769.2A CN110842267A (en) 2019-10-16 2019-10-16 Tapered four-edge milling cutter with variable core diameter and variable tooth pitch

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Publication number Priority date Publication date Assignee Title
US6991409B2 (en) * 2002-12-24 2006-01-31 Niagara Cutter Rotary cutting tool
DE10325600A1 (en) * 2003-06-06 2005-01-05 Franken GmbH + Co KG Fabrik für Präzisionswerkzeuge Router bit, comprising outer cutting areas arranged in slightly asymmetrical shape for reduction of oscillatory motion
US20070154272A1 (en) * 2006-01-04 2007-07-05 Sgs Tool Company Rotary cutting tool
CN201432138Y (en) * 2009-07-07 2010-03-31 中国兵器工业第五二研究所 Integral gradient core diameter ball end mill
US9327353B2 (en) * 2012-12-11 2016-05-03 Iscar, Ltd. Roughing and semi-finishing end mill having serrated and non-serrated cutting teeth
CN104400100A (en) * 2014-11-25 2015-03-11 山东大学 Bionics-based end mill with special groove profile and micro blade structure
CN105618828A (en) * 2016-04-08 2016-06-01 苏州阿诺精密切削技术股份有限公司 Fracture-toothed rough milling cutter
CN106270702A (en) * 2016-10-25 2017-01-04 哈尔滨理工大学 A kind of monoblock type hard alloy profile milling cutter with curve sword

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