WO2020088190A1 - 一种夹持稳定的钻削加工刀具 - Google Patents

一种夹持稳定的钻削加工刀具 Download PDF

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Publication number
WO2020088190A1
WO2020088190A1 PCT/CN2019/109463 CN2019109463W WO2020088190A1 WO 2020088190 A1 WO2020088190 A1 WO 2020088190A1 CN 2019109463 W CN2019109463 W CN 2019109463W WO 2020088190 A1 WO2020088190 A1 WO 2020088190A1
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WIPO (PCT)
Prior art keywords
clamping
cutting
peripheral surface
central axis
recess
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PCT/CN2019/109463
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English (en)
French (fr)
Inventor
江爱胜
王社权
李屏
刘敏
项兴东
赵志伟
Original Assignee
株洲钻石切削刀具股份有限公司
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Application filed by 株洲钻石切削刀具股份有限公司 filed Critical 株洲钻石切削刀具股份有限公司
Priority to EP19880451.0A priority Critical patent/EP3822010A4/en
Priority to US17/266,630 priority patent/US20210299760A1/en
Publication of WO2020088190A1 publication Critical patent/WO2020088190A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B23B51/0003—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
    • B23B51/0004—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts with cutting heads or inserts attached by screw means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/02—Connections between shanks and removable cutting heads

Definitions

  • the invention relates to a tool for drilling processing, in particular to a drilling tool with stable clamping.
  • cemented carbide or similar materials are used as tool materials. Because such materials have high hardness and good wear resistance, the machining is extremely difficult, which makes The material cost and processing cost of drilling tools are relatively high.
  • the commonly used drilling tools are generally assembled from cutting parts and clamping parts, where the cutting parts are made of hard alloy or similar materials with high hardness and strong wear resistance, and the clamping parts are made of more elastic Made of the material, when the cutting parts are worn, the cutting parts can be replaced separately, which can reduce the cost of drilling.
  • such tools generally have low positioning accuracy, are easy to fall off, and have a short life.
  • CN102015001011474 discloses a drilling tool.
  • the recessed and convex cooperation essentially refers to the clearance interference fit of the thread shape.
  • the gap refers to the amount of interference.
  • the invention provides a stable drilling and drilling tool with quick loading and unloading, no looseness in the axial direction, high positioning accuracy, and effective prevention of falling off of cutting parts.
  • the present invention adopts the following technical solutions:
  • a drilling tool with stable clamping includes a cutting component and a clamping component.
  • the cutting component includes a cutting portion and a connecting portion connected to the lower end of the cutting portion.
  • Groove the connecting part is provided with an outer peripheral surface between adjacent chip flutes
  • the cutting part and the connecting part are provided with an axial positioning surface for axial positioning
  • the clamping member includes a shank and a A clamping portion at the front end of the shank portion
  • the clamping portion is provided with a spiral groove corresponding to the chip flute and extending toward the shank portion
  • the clamping portion is provided between adjacent spiral grooves for clamping
  • the inner peripheral surface of the outer peripheral surface, the front end of the clamping portion is provided with an axial surface corresponding to the axial positioning surface, the axial positioning surface is in contact with the axial surface, the middle portion of the outer peripheral surface and the inner peripheral surface
  • the middle part is respectively provided with recesses and protrusions that engage with each other.
  • the recesses are spirally twisted into the protrusions in the direction of the central axis.
  • the surface fit has a varying interference amount ⁇ , which should satisfy: -0.1mm ⁇ 0.05mm.
  • the recess is composed of two recessed side surfaces and a recessed bottom surface connected between the recessed side surfaces, the recessed side surface is provided with an inner recessed side surface at an end close to the recessed bottom surface, and the protrusion is composed of two projected side surfaces And a convex top surface connected between the two convex side surfaces, the convex side surface is provided with an inner convex side surface on the side close to the inner peripheral surface, when the clamping component clamps the cutting component, the axial direction
  • the gap between the positioning surface and the axial surface is ⁇ 1, between the inner concave side of the concave side away from the axial positioning surface and the inner convex side of the convex side away from the axial surface
  • the gap between the inner concave side near the axial positioning surface and the inner convex side near the axial surface is ⁇ 3, which should satisfy: 0mm ⁇ 3 ⁇ 0.1mm.
  • the cutting part is provided with a torque transmission surface for circumferential positioning
  • the clamping part is provided with a circumferential surface for circumferential positioning
  • the torque transmission surface is in contact with the circumferential surface, and when the clamping member clamps the cutting member At this time, the gap between the torque transmission surface and the circumferential surface is ⁇ 4, which should satisfy: 0mm ⁇ 4 ⁇ 0.05mm.
  • the connecting portion is provided with a bottom end surface perpendicular to the central axis on the side away from the cutting portion, an oblique recess is provided between the recess and the bottom end surface, and the clamping portion is provided in a direction close to the shank side
  • the bottom surface of the groove perpendicular to the central axis is provided with a tail protrusion corresponding to the oblique recess between the protrusion and the bottom surface of the groove.
  • the recessed spiral rising angle of the cutting component is ⁇ , which should satisfy: 8 ° ⁇ 12 °.
  • the recessed side surface includes a top recessed side surface, the top recessed side surface is disposed near the outer peripheral surface, the raised side surface includes a top raised side surface, and the top raised side surface is disposed near the raised top surface when the clamping member When the cutting component is clamped, the top convex side does not contact the recess, and the top concave side does not contact the projection.
  • the concave side also includes an inner concave side, the inner concave side is located between the top concave side and the concave bottom, the convex side includes an inner convex side, and the inner convex side is located at the top convex Between the raised side surface and the convex top surface, the diameter of the outer peripheral surface of the cutting member is D, the radial depth of the inner concave side surface is L, and the radial depth of the top concave side surface is L1, the The radial depth L 'of the inner convex side, and the radial depth of the top convex side is L1', which should meet: 0.02D ⁇ L, L' ⁇ 0.15D, 0.003D ⁇ L1, L1' ⁇ 0.01D.
  • the distance from the projection line of the outer peripheral surface to the central axis is constant, and the projection line of the inner peripheral surface to the center is twisted into the inner peripheral surface of the clamping member during the twisting of the outer peripheral surface of the cutting member
  • the distance change of the axis is ⁇ R, which should meet: 0 ⁇ R ⁇ 0.04mm.
  • the maximum circumferential twisting angle of the recess and the protrusion is ⁇ , which should satisfy: 70 ° ⁇ 130 °.
  • the distance R from the projection line of the inner peripheral surface to the central axis has a minimum value in the plane passing through the central axis.
  • the maximum circumferential twisting angle of the recess and the protrusion is ⁇ , which should satisfy: 70 ° ⁇ 130 °.
  • the distance R 'from the projection line of the inner peripheral surface to the central axis has a maximum value in the plane passing through the central axis.
  • the concave spiral of the cutting component is twisted into the protrusion of the clamping component.
  • the outer peripheral surface of the cutting component and the inner peripheral surface of the clamping component are interference fit.
  • the inner peripheral surface fit essentially refers to the clearance interference fit of the inner hole wall and the outer cylinder.
  • the clamping component can not only quickly and conveniently complete the clamping of the cutting component, but also effectively prevent the cutting component from loosening around the central axis.
  • the drilling tool with stable clamping of the present invention has a gap between the axial positioning surface and the axial surface in the direction parallel to the central axis of ⁇ 1, and the concave side and the distance away from the axial positioning surface
  • the gapless clamping of the cutting parts enables accurate positioning of the cutting parts in the direction of the central axis, so that the cutting parts do not loose in the central direction during the cutting process, and improve the cutting stability.
  • a drilling tool with stable clamping has a cutting component and a clamping component respectively provided with a torque transmission surface and a circumferential surface for transmitting a circumferential load.
  • the torque transmission surface and the circumferential surface The gap between the facing surfaces is ⁇ 4, 0mm ⁇ 4 ⁇ 0.05mm, the clamping parts form the positioning clamping to the cutting parts, which has good positioning strength, accuracy and impact resistance; precise design of the torque transmission surface and the circumferential surface
  • the gap ⁇ 4 between equal surfaces can not only effectively reduce the difficulty of manufacturing the over-positioning structure, but also can use the axial micro-deformation of the protrusion (generally 0.004mm or less) to improve the recess, the contact area of the protrusion and the torque transmission surface and the circumference. Full contact with the surface, thereby improving the cutting component clamping stability and clamping repeatability times, while reducing cutting vibration and improving the surface quality of the hole while greatly improving the life of the cutting component.
  • the top convex side does not contact the recess, and the top concave side does not contact the protrusion, ensuring that the protrusion can only contact the inner recess side, which can be maximized
  • the effective contact length and contact strength of the recesses and protrusions prevent the cutting parts from falling off from the clamping parts, enhance the force capacity of the interface and prolong the service life of the cutting parts.
  • the drilling tool with stable clamping of the present invention is designed by accurately designing the concave spiral of the cutting component to twist into the convex spiral rising angle ⁇ of the clamping component and the clearance ⁇ 4 between the torque transmission surface and the circumferential surface, Even if the manufacturing tolerances of the cutting components inevitably exist, when the cutting components are installed in batches interchangeably, the axial positioning surface, the concave side surface and the torque transmission surface of the cutting components can be fully contacted with the clamping component, which greatly guarantees Interchangeability and performance stability of different cutting parts.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of an embodiment of the present invention.
  • Fig. 2 is a front view of an embodiment of the present invention.
  • Fig. 3 is a left side view in an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view taken along line AA of FIG. 2.
  • FIG. 5 is a BB cross-sectional view of FIG. 2.
  • FIG. 6 is a schematic diagram of a three-dimensional structure of a cutting component according to an embodiment of the present invention.
  • FIG. 7 is a front view of a cutting member in an embodiment of the present invention.
  • FIG. 8 is a CC cross-sectional view of FIG. 7.
  • FIG. 9 is a DD cross-sectional view of FIG. 7.
  • FIG. 10 is a schematic perspective view of the structure of the clip part in the embodiment of the present invention.
  • Fig. 11 is a side view of a clamping member in an embodiment of the present invention.
  • FIG. 12 is a FF cross-sectional view of FIG. 11.
  • Cutting parts 11. Cutting part; 111, cutting surface; 112, axial positioning surface; 113, torque transmitting surface; 12, connection part; 121, bottom end surface; 13, outer peripheral surface; 14, chip flute; 2 , Clamping part; 21, clamping part; 211, groove top surface; 212, axial surface; 213, groove bottom surface; 214, circumferential surface; 215, recessed bottom; 22, handle; 23, inner circumferential surface 24, central axis; 25, spiral groove; 3, recessed; 31, recessed side; 311, recessed side; 312, top recessed side; 32, recessed bottom; 4, convex; 41, convex Starting side; 411, inner convex side; 412, top convex side; 42, convex top side; 5, oblique recess; 51, oblique side; 52, oblique bottom; 6, tail convex; 61, tail side ; 62, the top surface of the tail.
  • FIGS. 1 to 12 show an embodiment of the present invention with a stable clamping drilling tool, which includes a cutting component 1 and a clamping component 2, a cutting component 1 and a clamping component 2 Symmetrically about the central axis 24,
  • the cutting member 1 includes a cutting portion 11 and a connecting portion 12 connected to the lower end of the cutting portion 11
  • the clamping member 2 includes a shank 22 and two clamping portions 21 at the front end of the shank 22, and the cutting member 1
  • the cutting portion 11 is provided with two cutting edges
  • the connecting portion 12 is provided with a plurality of chip flutes 14 penetrating through the cutting portion 11, and the connecting portion 12 is provided with an outer peripheral surface 13 between adjacent chip flutes 14 for clamping
  • the portion 21 is provided with a spiral groove 25 corresponding to the chip flute 14 and extending toward the shank portion 22.
  • the clamping portion 21 is provided with an inner peripheral surface 23 for clamping the outer peripheral surface 13 between adjacent spiral grooves 25.
  • the middle part and bottom part of the surface 13 are respectively provided with recesses 3 and oblique recesses 5, the middle part and bottom part of the inner circumferential surface 23 are respectively provided with protrusions 4 and tail protrusions 6, and the cutting part 11 and the connecting part 12 are provided at the junction
  • an axial surface 212 corresponding to the axial positioning surface 112 is provided on the clamping portion 21, a bottom end surface 121 of the connecting portion 12 of the cutting member 1 and
  • the clamping component 2 forms a high-precision, high-strength clamping of the cutting
  • the clamping process is clearance fit ⁇ clearance reduction ⁇ interference fit ⁇ increase in interference amount ⁇ maximum interference amount ⁇ clearance fit.
  • the change rule of the interference amount ⁇ is: from the minimum value ⁇ min , that is -0.1mm increased to a maximum value ⁇ max, i.e. 0.05mm, completely clamped, the amount of interference to a minimum value [lambda] recovery ⁇ min.
  • the interference amount is ⁇ in -Change between 0.05 and 0.03mm.
  • the interference ⁇ is -0.1mm (at this time, the clamping part 2 and the cutting part 1 are clearance fit), and then the interference ⁇ gradually increases to 0.05mm, in order to ensure that the inner circumferential surface 23 of the clamping part 2 can
  • the outer peripheral surface 13 of the cutting member 1 is stably elastically clamped, and a bottom recess 215 is provided on the groove bottom surface 213 of the clamping portion 21 of the clamping member 2.
  • a cutting surface 111 is provided at the front end of the cutting portion 11, a bottom end surface 121 is provided at the rear end of the connecting portion 12, the boundary between the cutting portion 11 and the connecting portion 12 is provided on an axial positioning surface 112 for axial positioning, and the two clamping portions 21 are along
  • the central shaft 24 is oppositely arranged, a mounting groove is provided in the middle, a groove top surface 211 is provided at the front end of the clamping portion 21, and a groove bottom surface 213 is provided at the rear end of the mounting groove.
  • a torque transmission surface 113 for circumferential positioning is provided, and the clamping portion 21 is provided with a circumferential surface 214 corresponding to the torque transmission surface 113 between the groove top surface 211 and the axial surface 212.
  • the recess 3 in the middle of the outer peripheral surface 13 of the connecting portion 12 of the cutting member 1 is composed of two recessed side surfaces 31 and a recessed bottom surface 32.
  • the recessed side surface 31 is composed of an inner recessed side surface 311 and a top recessed side surface 312, the inner recessed The side surface 311 is disposed near the recessed bottom surface 32, and the top recessed side surface 312 is disposed near the outer peripheral surface 13.
  • the protrusion 4 in the middle of the inner peripheral surface 23 of the clamping portion 21 is composed of two convex side surfaces 41 and a convex top surface 42.
  • the convex side surface 41 is composed of an inner convex side surface 411 and a top convex side surface 412, and the inner convex side surface 411 is disposed near the inner peripheral surface 23, and the top convex side surface 412 is disposed near the convex top surface 42.
  • the angle between the two recessed side surfaces 312 on the recess 3 is greater than the angle between the two inner recessed side surfaces 311, and between the two top projected side surfaces 412 on the protrusion 4
  • the angle is greater than the angle between the corresponding two inner convex side surfaces 411, and the angle between the two inner concave side surfaces 311 and the angle between the two inner convex side surfaces 411 are substantially equal.
  • an oblique recess 5 is provided between the recess 3 of the cutting portion 11 and the bottom end surface 121, and a tail protrusion 6 corresponding to the oblique recess 5 is provided on the clamping portion 21. 6 is provided between the protrusion 4 and the bottom surface 213 of the groove.
  • the oblique recess 5 is composed of an oblique side surface 51 and an oblique bottom surface 52
  • the tail protrusion 6 is composed of the tail side surface 61 and the tail top surface 62.
  • the oblique side surface 51 does not contact the inner tail side surface 61, and the side near the axial positioning surface 112
  • the gap between the inner concave side surface 311 and the inner convex side surface 411 on the side close to the axial surface 212 is ⁇ 3, which should satisfy: 0mm ⁇ 3 ⁇ 0.03mm.
  • the spiral elevation angle of the concave side 31 of the cutting member 1 is ⁇ , which should satisfy: 8 ° ⁇ 12 °.
  • the gap between the torque transmission surface 113 and the circumferential surface 214 is ⁇ 4, which should satisfy: 0mm ⁇ 4 ⁇ 0.05mm.
  • the inner convex side surface 411 on the side near the axial surface 212 cooperates with the inner concave side surface 311 on the side near the axial positioning surface 112, and the top convex side surface 412 does not contact the inner concave side surface 311 of the recess 3.
  • the gap between the oblique recess 5 and the tail protrusion 6 is ⁇ 5, which should satisfy: 0.02mm ⁇ 5 ⁇ 0.1mm.
  • the concave bottom surface 32 and the convex top surface 42 are not in contact.
  • the projection line of the outer peripheral surface 13 to the center axis 24 has a constant Distance
  • the recess R 3 of the cutting component 1 is twisted into the protrusion 4 of the clamping component 2
  • the distance R ′ from the projection line of the inner peripheral surface 23 on the connecting portion 12 of the cutting component 1 to the central axis 24 is twisted
  • the angle increases linearly, and the amount of change ⁇ R 'should meet: 0 ⁇ R' ⁇ 0.04mm.
  • the top convex side 412 is not in contact with the recess 3, and the top concave side 312 is not in contact with the projection 4. In order to ensure the positioning accuracy and clamping strength of the clamping member 2 to the cutting member 1, and to eliminate the roots of the recess 3 of the cutting member 1 and the protrusion 4 of the clamping member 2, the rooting cannot affect the positioning fixture.
  • the diameter of the outer peripheral surface 13 is D
  • the radial depth of the inner concave side 311 is L
  • the radial depth of the top concave side 312 is L1
  • the radial depth of the inner convex side 411 is L '
  • the radial depth of the side surface 412 is L1 ', which should satisfy 0.02D ⁇ L, L' ⁇ 0.15D, 0.003D ⁇ L1, L1' ⁇ 0.01D.
  • the outer peripheral surface 13 In order to ensure that one clamping component 2 can hold different cutting components 1 with better interchangeability and connection strength, in the plane passing through the central axis 24, when the actual twisting angle is 0.4 ⁇ -0.65 ⁇ , the outer peripheral surface 13 The distance R 'from the projection line to the central axis 24 has a minimum value (the interference amount is the largest when the radius of the outer peripheral surface 13 is the smallest). In order to ensure good installation convenience and high positioning strength, in this embodiment, the actual twist-in angle is When 0.45 ⁇ -0.55 ⁇ , the distance R ′ from the projection line of the outer peripheral surface 13 to the central axis 24 has a minimum value.
  • the distance from the projection line of the outer peripheral surface 13 to the central axis 24 is constant, while
  • the distance R from the projection line of the peripheral surface 23 to the central axis 24 is a variable amount to reduce the manufacturing difficulty.
  • the present invention is not limited to this.
  • the projection line of the inner peripheral surface 23 to the central axis may also be changed.
  • the distance 24 is constant.
  • the distance R ′ from the projection line of the outer peripheral surface 13 to the central axis 24 changes linearly with the increase of the twisting angle.
  • the amount of change is ⁇ R 'and should meet: 0 ⁇ ⁇ R' ⁇ 0.04mm.
  • the distance from the projection line of the outer peripheral surface 13 of the cutting member 1 to the central axis 24 and the distance from the projection line of the inner peripheral surface 23 of the clamping member 2 to the central axis 24 can also be designed to vary To ensure the amount of interference.
  • each cutting component 1 is provided with two cutting edges.
  • the present invention is not limited to this.
  • a single cutting component 1 may be provided with three or more cutting edges .
  • the distance R ′ from the outer peripheral surface 13 on the connecting portion 12 of the cutting member 1 to the central axis 24, the recess 3 of the cutting member 1 is twisted into the protrusion 4 of the clamping member 2, and
  • the increase change amount of the twisting angle ⁇ R, ⁇ R ′ changes linearly
  • the present invention is not limited to this, in order to improve the operation convenience of the cutting member 1 twisting into the clamping member 2, the change amount ⁇ R, ⁇ R ' Design into other changes such as quadratic curve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

一种夹持稳定的钻削加工工具，凹进（3）在沿中心轴（24）方向上螺旋扭入凸起（4），在夹持部件（2）夹持切削部件（1）的夹持过程中，外周面（13）和内周面（23）配合具有变化的过盈量。该钻削加工工具具有装卸快捷、轴向无松动、定位精度高、制造简单和互换性好等优点。

Description

一种夹持稳定的钻削加工刀具 【技术领域】
本发明涉及用于钻削加工的工具，尤其涉及一种夹持稳定的钻削加工刀具。
【背景技术】
在钻削加工中，为了延长切削部分的使用寿命，通常采用较为贵重的硬质合金或类似材料作为刀具材料，由于此类材料具有硬度高、耐磨性好的特点，加工极为困难，这使得钻削刀具用材成本和加工成本都较高。目前常用的钻削刀具一般是由切削部件和夹持部件组装而成，其中切削部件由硬度大、耐磨性能强的硬质合金或类似的材料制成，而夹持部件由具有较大弹性的材料制成，当切削部件被磨损后可单独更换切削部件，从而可降低钻削加工的成本。但是此类刀具一般定位精度不高且容易脱落，寿命短。
CN102015001011474公开了一种钻削加工刀具，凹进和凸起配合本质上是指螺纹牙形的间隙过盈配合，扭入过程中，先是间隙配合，后过盈配合，最后再至间隙配合，负的间隙指的是过盈量。采用螺纹过盈夹持时，虽然可以实现螺纹的过盈夹持，但是螺纹中径过盈尺寸准确控制难度较大，同时螺纹过盈位置发生在螺纹牙型的两侧，接触面积小刀头周向定心能力较差，轴向定位面完全接触，批量安装时，刀头的轴向、周向跳动精度难以保证，且螺纹过盈只能夹持，无法中心定心。
【发明内容】
本发明提供一种装卸快捷、轴向无松动、定位精度高、有效防止切削部件脱落的夹持稳定的钻削加工刀具。
为解决上述技术问题，本发明采用以下技术方案：
一种夹持稳定的钻削加工刀具，包括切削部件和夹持部件，所述切削部件包括切削部和连接于切削部下端的连接部，所述连接部上设有多个贯穿切削部的容屑槽，所述连接部在相邻的容屑槽间设有外周面，所述切削部与连接部连接处设有用于轴向定位的轴向定位面，所述夹持部件包括柄部和位于柄部前端的夹持部，所述夹持部上设有和容屑槽相对应且向柄部延伸的螺旋槽，所述夹持部在相邻的螺旋槽之间设有用于夹持所述外周面的内周面，所述夹持部前端设有和轴向定位面相对应的轴向面，所述轴向定位面与轴向面接触，所述外周面的中部和内周面的中部分别设有相互咬合的凹进和凸起，所述凹进在沿中心轴方向上螺旋扭入凸起，在夹持部件夹持切削部件的夹持过程中，所述外周面和内周面配合 具有变化的过盈量λ，应满足：-0.1mm≤λ≤0.05mm。
作为对上述技术方案的进一步改进：
所述凹进由两凹进侧面和连接于凹进侧面之间的凹进底面构成，所述凹进侧面在靠近凹进底面一端设有内凹进侧面，所述凸起由两凸起侧面和连接于两凸起侧面之间的凸起顶面的构成，所述凸起侧面在靠近内周面一侧设有内凸起侧面，当夹持部件夹持切削部件时，所述轴向定位面和轴向面之间的间隙为τ1，所述远离轴向定位面一侧的凹进侧面的内凹进侧面和远离轴向面一侧的凸起侧面的内凸起侧面之间的间隙为τ2，应满足：τ1＝τ2＝0。
当夹持部件夹持切削部件时，所述靠近轴向定位面一侧的内凹进侧面和靠近轴向面一侧的内凸起侧面之间的间隙为τ3，应满足：0mm≤τ3≤0.1mm。
所述切削部设有用于周向定位的扭矩传递面，所述夹持部设有用于周向定位的周向面，所述扭矩传递面与周向面接触，当夹持部件夹持切削部件时，所述扭矩传递面和周向面之间的间隙为τ4，应满足：0mm≤τ4≤0.05mm。
所述连接部在远离切削部一侧设有与中心轴垂直的底端面，所述凹进和底端面之间设有斜凹进，所述夹持部在靠近柄部一侧方向上设有与中心轴垂直的槽底面，所述凸起和槽底面之间设和斜凹进对应的尾凸起，当夹持部件夹持切削部件时，所述斜凹进与尾凸起之间的间隙为τ5，应满足：0.02mm≤τ5≤0.1mm。
在沿中心轴方向上，所述切削部件的凹进的螺旋升角为α，应满足：8°≤α≤12°。
所述凹进侧面包括顶凹进侧面，所述顶凹进侧面靠近外周面设置，所述凸起侧面包括顶凸起侧面，所述顶凸起侧面靠近凸起顶面设置，当夹持部件夹持切削部件时，所述顶凸起侧面与所述凹进不接触，所述顶凹进侧面与所述凸起不接触。
所述凹进侧面还包括内凹进侧面，所述内凹进侧面位于顶凹进侧面和凹进底面之间，所述凸起侧面包括内凸起侧面，所述内凸起侧面位于顶凸起侧面和凸起顶面之间，所述切削部件的外周面的直径为D，所述内凹进侧面的径向深度为L，所述顶凹进侧面的径向深度为L1，所述内凸起侧面的径向深度L’，所述顶凸起侧面的径向深度为L1’，应满足：0.02D≤L，L’≤0.15D，0.003D≤L1，L1’≤0.01D。
在过中心轴平面内，所述外周面的投影线至中心轴的距离恒定，所述切削部件的外周面扭入夹持部件的内周面过程中，所述内周面的投影线至中心轴的距离变化量为△R，应满足：0<△R≤0.04mm。
所述切削部件的凹进完全扭入夹持部件的凸起时，所述凹进与凸起的最大周向扭入角度为γ，应满足：70°≤γ≤130°。
当扭入角度为0.4γ-0.65γ时，在过中心轴平面内，所述内周面的投影线至中心轴的 距离R具有最小值。
所述切削部件的凹进扭入夹持部件的凸起时，随着扭入角度的增大，所述距离变化量△R呈线性变化。
在过中心轴平面内，所述内周面的投影线至中心轴的距离R恒定，所述切削部件的外周面扭入夹持部件的内周面过程中，在过中心轴平面内，所述外周面的投影线至中心轴的距离变化量为△R’，应满足：0<△R’≤0.04mm。
所述切削部件的凹进完全扭入夹持部件的凸起时，所述凹进和凸起的最大周向扭入角度为γ，应满足：70°≤γ≤130°。
当扭入角度为0.4γ-0.65γ时，在过中心轴平面内，所述内周面的投影线至中心轴的距离R’具有最大值。
所述切削部件的凹进扭入夹持部件的凸起时，随着扭入角度的增大，所述距离变化量△R’呈线性变化。
与现有技术相比，本发明的优点在于：
本发明的一种夹持稳定的钻削加工刀具，切削部件的凹进螺旋扭入夹持部件的凸起，切削部件的外周面和夹持部件的内周面发生过盈配合，外周面、内周面配合本质上指的是内孔壁、外圆柱的间隙过盈配合，扭入过程中，先是间隙配合，后过盈配合，最后再至间隙配合，内孔、外圆柱即可夹持又可准确定心，提高装配精度，并可降低凹进和凸起的制造难度，夹持部件不仅可以快速方便的完成切削部件的装夹，而且可有效防止切削部件绕中心轴发生松动。
本发明的一种夹持稳定的钻削加工刀具，在平行于中心轴方向上，轴向定位面和轴向面之间的间隙为τ1，远离轴向定位面一侧的凹进侧面和远离轴向面一侧的凸起侧面之间的间隙为τ2，应满足：τ1＝τ2＝0，夹持部件和切削部件在轴向定位面、内凹进侧面对切削部件同时进行向上和向下的无间隙夹持，使切削部件在中心轴方向准确定位，使切削部件在切削过程中在中心方向不发生任何松动，提高切削稳定性。
本发明的一种夹持稳定的钻削加工刀具，切削部件、夹持部件分别设有用于传递周向负载的扭矩传递面、周向面，在沿中心轴旋转方向上，扭矩传递面和周向面之间的间隙为τ4，0mm≤τ4≤0.05mm，夹持部件对切削部件形成过定位夹持，具有很好定位强度、精度和抗冲击性；精准确设计扭矩传递面、周向面等面之间的间隙τ4，不仅可以有效降低过定位结构制造难度，而且可以利用凸起的轴向微变形(一般0.004mm以下)来提高凹进、凸起接触面积和实现扭矩传递面、周向面完全接触，从而提高切削部件夹持稳定性和夹持可重复性次数，在降低切削振动、提高孔的表面质量的同时极大的提高切削部件的寿命。
本发明的一种夹持稳定的钻削加工刀具，顶凸起侧面与凹进不接触，顶凹进侧面与凸起不接触，保证凸起仅能和内凹进侧面接触，可以最大程度提高凹进、凸起的有效接触长度和接触强度，防止切削部件从夹持部件脱落、提升接口受力能力从而延长切削部件的使用寿命。
本发明的一种夹持稳定的钻削加工刀具，通过精准设计切削部件的凹进螺旋扭入夹持部件的凸起的螺旋升角α和扭矩传递面、周向面之间的间隙τ4，即使切削部件制造公差不可避免的存在，在切削部件批量互换性安装时，仍可保证切削部件的轴向定位面、内凹进侧面和扭矩传递面和夹持部件充分接触，极大的保证不同切削部件互换性和性能的稳定性。
【附图说明】
图1是本发明实施例的立体结构示意图。
图2是本发明实施例中的主视图。
图3是本发明实施例中的左视图。
图4是图2的A－A剖视图。
图5是图2的B－B剖视图。
图6是本发明实施例切削部件立体结构示意图。
图7是本发明实施例中切削部件的主视图。
图8是图7的C－C剖视图。
图9是图7的D－D剖视图。
图10是本发明实施例中夹部部件的立体结构示意图。
图11是本发明实施例中夹持部件侧视图。
图12是图11的F－F剖视图。
图中各标号表示：
1、切削部件；11、切削部；111、切削面；112、轴向定位面；113、扭矩传递面；12、连接部；121、底端面；13、外周面；14、容屑槽；2、夹持部件；21、夹持部；211、槽顶面；212、轴向面；213、槽底面；214、周向面；215、底凹进；22、柄部；23、内周面；24、中心轴；25、螺旋槽；3、凹进；31、凹进侧面；311、内凹进侧面；312、顶凹进侧面；32、凹进底面；4、凸起；41、凸起侧面；411、内凸起侧面；412、顶凸起侧面；42、凸起顶面；5、斜凹进；51、斜侧面；52、斜底面；6、尾凸起；61、尾侧面；62、尾顶面。
【具体实施方式】
以下将结合说明书附图和具体实施例对本发明做进一步详细说明。
图1至图12示出了本发明的夹持稳定的钻削加工刀具的实施例，该夹持稳定的钻削加工刀具包括切削部件1和夹持部件2，切削部件1和夹持部件2关于中心轴24对称，切削部件1包括切削部11和连接于切削部11下端的连接部12，夹持部件2包括柄部22和两个位于柄部22前端的夹持部21，切削部件1的切削部11上设有两个切削刃，连接部12上设有多个贯穿切削部11的容屑槽14，连接部12在相邻的容屑槽14间设有外周面13，夹持部21上设有和容屑槽14对应且向柄部22延伸的螺旋槽25，夹持部21在相邻的螺旋槽25之间设有用于夹持外周面13的内周面23，外周面13上的中部、底部分别设有凹进3、斜凹进5，内周面23上的中部、底部分别设有凸起4、尾凸起6，切削部11、连接部12交界处设有轴向定位面112，夹持部21上设有和轴向定位面112对应的轴向面212，切削部件1的连接部12的底端面121和夹持部件2的夹持部21的槽底面213之间设有间隙，凹进3绕夹持部件2的中心轴24螺旋转动容纳凸起4至咬合实现夹持部件2对切削部件1的完全夹持，为了保证夹持部件2对切削部件形成高精度、高强度的夹持并保证切削部件1在使用过程中不从夹持部件2上脱落，完全夹持过程中，外周面13和内周面23配合具有变化的过盈量为λ，应满足：-0.1mm≤λ≤0.05mm。
在夹持过程中，夹持过程为间隙配合～间隙减少～过盈配合～过盈量增大～过盈量最大～间隙配合，过盈量λ的变化规律为：由最小值λ min，即-0.1mm增加为最大值λ max，即0.05mm，完全夹持后，过盈量λ恢复为最小值λ min。
本实施例中，为了提高夹持部件2对切削部件1的装夹效果，切削部件1在扭入夹持部件2过程中，夹装部件从间隙至过盈过程中，过盈量为λ在-0.05～0.03mm之间变化。夹持开始过盈量λ为-0.1mm(此时夹持部件2和切削部件1为间隙配合)，随后过盈量λ逐渐增加至0.05mm，为保证夹持部件2的内周面23能稳定弹性夹持切削部件1的外周面13，夹持部件2的夹持部21的槽底面213上设有底部凹进215。
切削部11前端设有切削面111，连接部12后端设有底端面121，切削部11与连接部12交界处设于用于轴向定位的轴向定位面112，两夹持部21沿中心轴24相对设置，中部设有安装槽，夹持部21前端设有槽顶面211，安装槽后端设有槽底面213，在沿中心轴24方向上，切削面111、轴向定位面112之间设有用于周向定位的扭矩传递面113，夹持部21在槽顶面211和轴向面212之间设有和扭矩传递面113对应的周向面214。
切削部件1的连接部12的外周面13中部的凹进3由两凹进侧面31和凹进底面32构成，凹进侧面31由内凹进侧面311和顶凹进侧面312组成，内凹进侧面311靠近凹进底面32设置，顶凹进侧面312靠近外周面13设置。
夹持部21的内周面23中部的凸起4由两凸起侧面41和凸起顶面42构成，凸起侧面 41由内凸起侧面411和顶凸起侧面412组成，内凸起侧面411靠近内周面23设置，顶凸起侧面412靠近凸起顶面42设置。
在过中心轴24的平面内，凹进3上的两顶凹进侧面312之间夹角大于两内凹进侧面311之间的夹角，凸起4上两顶凸起侧面412之间夹角大于对应两内凸起侧面411之间的夹角，而两内凹进侧面311之间的夹角和两内凸起侧面411之间的夹角基本相等。
为了使夹持部件2对切削部件1形成过定位夹持，提高装夹的稳定性和抗冲击性，夹持部件2完全夹持切削部件1时，轴向定位面112和轴向面212之间的间隙为τ1，远离轴向定位面112一侧的内凹进侧面311和远离轴向面212一侧的内凸起侧面411之间的间隙为τ2，应满足：τ1＝τ2＝0。即远离轴向定位面112一侧的内凹进侧面311与远离轴向面212一侧的内凸起侧面411、轴向定位面112与轴向面212接触。
在沿中心轴24方向平面上，切削部11的凹进3和底端面121之间设有斜凹进5，夹持部21设有与斜凹进5对应的尾凸起6，尾凸起6设于凸起4和槽底面213之间。斜凹进5由一斜侧面51和一斜底面52组成，尾凸起6由尾侧面61和尾顶面62组成，斜侧面51与内尾侧面61不接触，靠近轴向定位面112一侧的内凹进侧面311和靠近轴向面212一侧的内凸起侧面411之间的间隙为τ3，应满足：0mm≤τ3≤0.03mm。
在沿中心轴24方向上，切削部件1的凹进侧面31的螺旋升角为α，应满足：8°≤α≤12°。
扭矩传递面113与周向面214接触，夹持部件2完全夹持切削部件1时，扭矩传递面113和周向面214之间的间隙为τ4，应满足：0mm≤τ4≤0.05mm。
靠近轴向面212一侧的内凸起侧面411与靠近轴向定位面112一侧的内凹进侧面311配合，而顶凸起侧面412与凹进3的内凹进侧面311不接触。在沿中心轴24方向平面上，斜凹进5和尾凸起6之间的间隙为τ5，应满足：0.02mm≤τ5≤0.1mm。
凹进底面32、凸起顶面42不接触，为了简化夹持部件2对切削部件1的结构并降低制作难度，在过中心轴24平面内，外周面13的投影线至中心轴24具有恒定的距离，切削部件1的凹进3扭入夹持部件2的凸起4过程中，切削部件1的连接部12上内周面23的投影线至中心轴24的距离R’随着扭入角度的增加呈线性变化，且变化量△R’，应满足：0<△R’≤0.04mm，为了保证切削部件1、夹持部件2具有较好的安装互换性，夹持定位准确，本实施例中，△R＝0.025mm。
顶凸起侧面412与凹进3不接触，顶凹进侧面312与凸起4不接触。为了保证夹持部件2对切削部件1的定位精度和夹持强度，并消除切削部件1的凹进3和夹持部件2的凸起4的根部无法清根对定位装夹的影响，切削部件1的外周面13的直径为D，内凹进侧面 311的径向深度为L，顶凹进侧面312的径向深度为L1，内凸起侧面411的径向深度为L’，顶凸起侧面412的径向深度为L1’，应满足0.02D≤L，L’≤0.15D，0.003D≤L1，L1’≤0.01D。本实施例中，为了保证内凸起侧面411与内凹进侧面311充分接触和定位强度，L1＝0.06D，L2＝0.07D。
切削部件1的凹进3完全扭入夹持部件2的凸起4时，凹进3和凸起4需绕中心轴24螺旋旋转的最大周向扭入角度γ，应满足：70°≤γ≤130°，为了保证切削部件1能够方便装卸并保证夹持部件2对切削部件1的夹持有足够的强度，本实施例中，γ＝100°。
为了保证一个夹持部件2可以装夹不同切削部件1具有较好的互换性、连接强度，在过中心轴24的平面内，当实际扭入角度为0.4γ-0.65γ时，外周面13的投影线至中心轴24的距离R’具有最小值(外周面13半径最小时过盈量最大)，为了保证具有好安装便捷性、高的定位强度，本实施例中，实际扭入角度为0.45γ-0.55γ时，外周面13的投影线至中心轴24的距离R’具有最小值。
本实施例中，切削部件1的凹进3扭入夹持部件2的凸起4过程中，在过中心轴24的平面内，外周面13的投影线至中心轴24的距离恒定，而内周面23的投影线至中心轴24的距离R为变化量，以降低制造难度，本发明不仅限于此，根据制作难度和设计方式的不同，也可以将内周面23的投影线至中心轴24的距离恒定，切削部件1的凹进3扭入夹持部件2的凸起4过程中，外周面13的投影线至中心轴24的距离R’随着扭入角度的增加呈线性变化，变化量为△R’且应满足：0≤△R’≤0.04mm。
另外，根据设计和制造工艺不同，也可以将切削部件1外周面13的投影线至中心轴24的距离和夹持部件2内周面23的投影线至中心轴24的距离都设计成变化的，以保证过盈量。
以上实施例中，每个切削部件1设有两个切削刃，本发明不仅限于此，根据具体应用不同和工况参数的差异，可以将单个切削部件1上设有三个或更多的切削刃。同时，以上实施例中，切削部件1的连接部12上的外周面13至中心轴24的距离R’，切削部件1的凹进3扭入夹持部件2的凸起4过程中，随着扭入角度的增加变化量△R、△R’呈线性变化，本发明不仅限于此，为了提高切削部件1扭入夹持部件2的操作便利性，也可以将变化量△R、△R’设计成二次曲线等其它变化。
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。任何熟悉本领域的技术人员，在不脱离本发明技术方案范围的情况下，都可利用上述揭示的技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、等 同变化及修饰，均应落在本发明技术方案保护的范围内。

Claims (16)

  1. 一种夹持稳定的钻削加工刀具，包括切削部件(1)和夹持部件(2)，所述切削部件(1)包括切削部(11)和连接于切削部(11)下端的连接部(12)，所述连接部(12)上设有多个贯穿切削部(11)的容屑槽(14)，所述连接部(12)在相邻的容屑槽(14)间设有外周面(13)，所述切削部(11)与连接部(12)连接处设有用于轴向定位的轴向定位面(112)，所述夹持部件(2)包括柄部(22)和位于柄部(22)前端的夹持部(21)，所述夹持部(21)上设有和容屑槽(14)相对应且向柄部(22)延伸的螺旋槽(25)，所述夹持部(21)在相邻的螺旋槽(25)之间设有用于夹持所述外周面(13)的内周面(23)，所述夹持部(21)前端设有和轴向定位面(112)相对应的轴向面(212)，所述轴向定位面(112)与轴向面(212)接触，所述外周面(13)的中部和内周面(23)的中部分别设有相互咬合的凹进(3)和凸起(4)，所述凹进(3)在沿中心轴(24)方向上螺旋扭入凸起(4)，其特征在于：在夹持部件(2)夹持切削部件(1)的夹持过程中，所述外周面(13)和内周面(23)配合具有变化的过盈量λ，应满足：-0.1mm≤λ≤0.05mm。
  2. 根据权利要求1所述的钻削加工刀具，其特征在于：所述凹进(3)由两凹进侧面(31)和连接于凹进侧面(31)之间的凹进底面(32)构成，所述凹进侧面(31)在靠近凹进底面(32)一端设有内凹进侧面(311)，所述凸起(4)由两凸起侧面(41)和连接于两凸起侧面(41)之间的凸起顶面(42)的构成，所述凸起侧面(41)在靠近内周面(23)一侧设有内凸起侧面(411)，当夹持部件(2)夹持切削部件(1)时，所述轴向定位面(112)和轴向面(212)之间的间隙为τ1，所述远离轴向定位面(112)一侧的凹进侧面(31)的内凹进侧面(311)和远离轴向面(212)一侧的凸起侧面(41)的内凸起侧面(411)之间的间隙为τ2，应满足：τ1＝τ2＝0。
  3. 根据权利要求2所述的钻削加工刀具，其特征在于：当夹持部件(2)夹持切削部件(1)时，所述靠近轴向定位面(112)一侧的内凹进侧面(311)和靠近轴向面(212)一侧的内凸起侧面(411)之间的间隙为τ3，应满足：0mm≤τ3≤0.1mm。
  4. 根据权利要求3所述的钻削加工刀具，其特征在于：所述切削部(11)设有用于周向定位的扭矩传递面(113)，所述夹持部(21)设有用于周向定位的周向面(214)，所述扭矩传递面(113)与周向面(214)接触，当夹持部件(2)夹持切削部件(1)时，所述扭矩传递面(113)和周向面(214)之间的间隙为τ4，应满足：0mm≤τ4≤0.05mm。
  5. 根据权利要求4所述的钻削加工刀具，其特征在于：所述连接部(12)在远离切削部(11)一侧设有与中心轴(24)垂直的底端面(121)，所述凹进(3)和底端面(121)之间设有斜凹进(5)，所述夹持部(21)在靠近柄部(22)一侧方向上设有与中心轴(24) 垂直的槽底面(213)，所述凸起(4)和槽底面(213)之间设和斜凹进(5)对应的尾凸起(6)，当夹持部件(2)夹持切削部件(1)时，所述斜凹进(5)与尾凸起(6)之间的间隙为τ5，应满足：0.02mm≤τ5≤0.1mm。
  6. 根据权利要求1至5中任一项所述的钻削加工刀具，其特征在于：在沿中心轴(24)方向上，所述切削部件(1)的凹进(3)的螺旋升角为α，应满足：8°≤α≤12°。
  7. 根据权利要求2至5任一项所述的钻削加工刀具，其特征在于：所述凹进侧面(31)包括顶凹进侧面(312)，所述顶凹进侧面(312)靠近外周面(13)设置，所述凸起侧面(41)包括顶凸起侧面(412)，所述顶凸起侧面(412)靠近凸起顶面(42)设置，当夹持部件(2)夹持切削部件(1)时，所述顶凸起侧面(412)与所述凹进(3)不接触，所述顶凹进侧面(312)与所述凸起(4)不接触。
  8. 根据权利要求7所述的钻削加工刀具，其特征在于：所述凹进侧面(31)还包括内凹进侧面(311)，所述内凹进侧面(311)位于顶凹进侧面(312)和凹进底面(32)之间，所述凸起侧面(41)包括内凸起侧面(411)，所述内凸起侧面(411)位于顶凸起侧面(412)和凸起顶面(42)之间，所述切削部件(1)的外周面(13)的直径为D，所述内凹进侧面(311)的径向深度为L，所述顶凹进侧面(312)的径向深度为L1，所述内凸起侧面(411)的径向深度L’，所述顶凸起侧面(412)的径向深度为L1’，应满足：0.02D≤L，L’≤0.15D，0.003D≤L1，L1’≤0.01D。
  9. 根据权利要求8所述的钻削加工刀具，其特征在于：在过中心轴(24)平面内，所述外周面(13)的投影线至中心轴(24)的距离恒定，所述切削部件(1)的外周面(13)扭入夹持部件(2)的内周面(23)过程中，所述内周面(23)的投影线至中心轴(24)的距离变化量为△R，应满足：0<△R≤0.04mm。
  10. 根据权利要求9所述的钻削加工刀具，其特征在于：所述切削部件(1)的凹进(3)完全扭入夹持部件(2)的凸起(4)时，所述凹进(3)与凸起(4)的最大周向扭入角度为γ，应满足：70°≤γ≤130°。
  11. 根据权利要求10所述的钻削加工刀具，其特征在于：当扭入角度为0.4γ-0.65γ时，在过中心轴(24)平面内，所述内周面(23)的投影线至中心轴(24)的距离R具有最小值。
  12. 根据权利要求11所述的钻削加工刀具，其特征在于：所述切削部件(1)的凹进(3)扭入夹持部件(2)的凸起(4)时，随着扭入角度的增大，所述距离变化量△R呈线性变化。
  13. 根据权利要求8所述的钻削加工刀具，其特征在于：在过中心轴(24)平面内， 所述内周面(23)的投影线至中心轴(24)的距离R恒定，所述切削部件(1)的外周面(13)扭入夹持部件(2)的内周面(23)过程中，在过中心轴(24)平面内，所述外周面(13)的投影线至中心轴(24)的距离变化量为△R’，应满足：0<△R’≤0.04mm。
  14. 根据权利要求13所述的钻削加工刀具，其特征在于：所述切削部件(1)的凹进(3)完全扭入夹持部件(2)的凸起(4)时，所述凹进(3)和凸起(4)的最大周向扭入角度为γ，应满足：70°≤γ≤130°。
  15. 根据权利要求14所述的钻削加工刀具，其特征在于：当扭入角度为0.4γ-0.65γ时，在过中心轴(24)平面内，所述内周面(23)的投影线至中心轴(24)的距离R’具有最大值。
  16. 根据权利要求15所述的钻削加工刀具，其特征在于：所述切削部件(1)的凹进(3)扭入夹持部件(2)的凸起(4)时，随着扭入角度的增大，所述距离变化量△R’呈线性变化。
PCT/CN2019/109463 2018-11-02 2019-09-30 一种夹持稳定的钻削加工刀具 WO2020088190A1 (zh)

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CN113953564A (zh) * 2021-11-11 2022-01-21 株洲钻石切削刀具股份有限公司 一种分体式钻削加工刀具
CN113953565B (zh) * 2021-11-11 2023-06-27 株洲钻石切削刀具股份有限公司 一种钻削加工刀具
CN117139699A (zh) * 2023-09-26 2023-12-01 株洲钻石切削刀具股份有限公司 一种径向夹持稳定的钻削刀具

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