WO2013082918A1 - 切削刀具 - Google Patents

切削刀具 Download PDF

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Publication number
WO2013082918A1
WO2013082918A1 PCT/CN2012/075286 CN2012075286W WO2013082918A1 WO 2013082918 A1 WO2013082918 A1 WO 2013082918A1 CN 2012075286 W CN2012075286 W CN 2012075286W WO 2013082918 A1 WO2013082918 A1 WO 2013082918A1
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WO
WIPO (PCT)
Prior art keywords
tooth
concave
convex
blade
sipe
Prior art date
Application number
PCT/CN2012/075286
Other languages
English (en)
French (fr)
Inventor
江爱胜
王社权
刘敏
易为
Original Assignee
株洲钻石切削刀具股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of WO2013082918A1 publication Critical patent/WO2013082918A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
    • B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts 
    • B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts  having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/12—Side or flank surfaces
    • B23C2200/128—Side or flank surfaces with one or more grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/16—Fixation of inserts or cutting bits in the tool
    • B23C2210/168—Seats for cutting inserts, supports for replacable cutting bits

Definitions

  • This invention relates to the field of metal cutting, and more particularly to cutting tools.
  • the cutting tool is generally connected by means of a plane contact between the blade body and the blade side.
  • the cutter body and the blade of the cutter are simple to manufacture and easy to process.
  • the effective contact area can be increased, the transmitted torque can be increased, the impact resistance of the blade can be enhanced, and the dimensional accuracy of the cutting tool can be ensured.
  • the large area contact between the cutter body and the blade positioning surface can make the positioning surface only slightly deform when the blade is subjected to a large load, which effectively ensures the consistency of the dimensional accuracy of the cutting tool during static and machining, and improves the cutting tool. Tool stability under different operating conditions. Since the planar positioning cutting tool has the above advantages, the cutting tool structure is widely used in rotary cutters and non-rotation cutters.
  • planar positioning structure has many advantages, there are some problems. Due to the deformation of the blade, the fixture clamping error of the tool and the blade, the machining error, and the detection error due to the assembly error, the plane positioning surface of the blade body and the blade can be processed into a plane with good flatness and high precision, but It is difficult to ensure that the corresponding positioning faces are completely overlapped. In order to ensure the impact resistance and dimensional stability of the cutting tool, it is generally preferred to ensure that the side near the bottom surface of the blade is in contact with the side of the sipe, that is, the angle between the side of the sipe and the bottom surface of the sipe is less than The angle between the side of the blade and the bottom surface of the blade.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a cutting tool which is structurally stable, can effectively suppress vibration, and can improve impact resistance.
  • the present invention adopts the following technical solutions:
  • a cutting tool includes a cutter body, a blade and a fastener, wherein the cutter body is provided with at least one set of chip pockets and a sipe, and the cutter body fixes the blade in the sipe by a fastener,
  • the sipe is composed of a side surface of the sipe and a bottom surface of the sipe
  • the blade is composed of an upper bottom surface, a lower bottom surface and a side surface connecting the upper bottom surface and the lower bottom surface, and a side surface of the blade and a side surface of the sipe are disposed to prevent the side surface A concave-convex fitting structure that is inclined outward from the side of the sipe.
  • each convex saw tooth is respectively placed in the corresponding concave saw tooth, and 1 ⁇ M ⁇ 5, 1 ⁇ N ⁇ 5, N ⁇ M.
  • the concave sawtooth is disposed in parallel with the convex sawtooth, and the concave sawtooth and the convex sawtooth are both non-perpendicular to the bottom surface of the sipe Settings.
  • Each concave serration is composed of a concave upper tooth surface, a concave tooth lower tooth surface, a concave tooth bottom surface and a concave tooth top surface
  • each convex saw tooth is composed of a convex tooth upper surface, a convex tooth lower surface, a convex tooth bottom surface and a convex tooth top surface.
  • the angle between the upper tooth surface of the concave tooth and the lower tooth surface of the concave tooth is ⁇
  • the angle between the upper tooth surface of the convex tooth and the lower tooth surface of the convex tooth is ⁇ , 40° ⁇ 140 °, 40 ° ⁇ ⁇ ⁇ 140 °.
  • the angle ⁇ between the upper tooth surface of the concave tooth and the lower tooth surface of the concave tooth is less than or equal to the angle ⁇ between the upper tooth surface of the convex tooth and the lower tooth surface of the convex tooth.
  • a first pre-tightening gap is disposed between the bottom surface of the concave tooth and the top surface of the convex tooth, and a second pre-tightening gap is disposed between the top surface of the concave tooth and the bottom surface of the convex tooth.
  • a third pre-tightening gap is disposed between the lower tooth surface of the concave tooth and the lower tooth surface of the convex tooth, and the upper tooth surface of the concave tooth is in close contact with the upper tooth surface of the convex tooth.
  • a fourth pre-tightening gap is provided between the side surface of the sipe and the side surface.
  • the present invention has the advantages that the cutting tool of the present invention has a concave-convex fitting structure between the side of the blade body and the side of the blade to prevent the side surface from being inclined outwardly with respect to the side of the sipe, so that the blade body and the blade are connected. More compact and reliable, during the cutting process, the blade deformation can be greatly reduced, thereby suppressing and attenuating the cutting vibration of the tool, improving the surface quality of the machine, and effectively suppressing the chipping of the blade; and the concave-convex fitting structure can reduce the load of the fastener.
  • the concave-convex fit structure can improve the force distribution of the blade, improve the stability of the tool, enable the tool to withstand greater cutting force, and broaden the application range of the cutting tool in the field of gravity cutting.
  • FIG. 1 is a perspective view showing the structure of an embodiment of a rotary cutting tool according to the present invention.
  • Figure 2 is an enlarged cross-sectional view of the ⁇ _ ⁇ of Figure 1.
  • Figure 3 is an enlarged view of the tooth profile of Figure 2.
  • FIG. 4 is a schematic perspective view showing the embodiment of the non-rotating cutting tool of the present invention.
  • Figure 5 is an enlarged view of B in Figure 4.
  • ⁇ detailed description ⁇ 1 to 3 show an embodiment of a rotary cutting tool of the present invention, which includes a cutter body 1, a blade 2 and a fastener 3, and the cutter body 1 is a cylindrical body centered on its own central axis. a cutter body, the cutter body 1 is provided with a set of chip flutes 4 and a sipe 5, and the cutter body 1 fixes the insert 2 in the sipe 5 by a fastener 3, and the sipe 5 is formed by the sipe side 51 and the sipe bottom surface
  • the blade 2 is composed of an upper bottom surface 21, a lower bottom surface 22, and a side surface 23 connecting the upper bottom surface 21 and the lower bottom surface 22.
  • the side surface 23 of the blade 2 and the sipe side surface 51 are disposed to prevent the side surface 23 from being opposite to the sipe side surface 51.
  • the outwardly inclined concave-convex fitting structure makes the connection between the blade body 1 and the blade 2 more compact and reliable, and the deformation of the blade 2 can be greatly reduced during the cutting process, thereby suppressing and attenuating the cutting vibration of the tool and improving the quality of the machined surface.
  • the utility model can effectively suppress the collapse of the blade 2; at the same time, the concave-convex fitting structure can reduce the load of the fastener 3 and prolong the service life of the fastener 3; and the concave-convex fitting structure can improve the force distribution of the blade 2 and improve the stability of the cutter, so that the stability of the cutter is improved.
  • the tool can withstand larger cutting Force, broaden the range of applications of cutting tools in the field of gravity cutting.
  • the concave serrations 6 are disposed in parallel with the convex serrations 7, and both the concave serrations 6 and the convex serrations 7 are non-perpendicular to the sipe bottom surface 52.
  • Each concave serration 6 is composed of a concave upper tooth surface 61, a concave tooth lower surface 62, a concave tooth bottom surface 63 and a concave tooth top surface 64.
  • Each convex saw tooth 7 is composed of a convex upper tooth surface 71, a convex tooth lower surface 72, The convex tooth bottom surface 73 and the convex tooth top surface 74 are formed.
  • the angle between the concave tooth upper surface 61 and the concave tooth lower surface 62 is ⁇ , and the convex tooth upper surface 71 and the convex tooth lower surface 72 are sandwiched.
  • the angle is ⁇ , 40° ⁇ ⁇ ⁇ 140°, 40° ⁇ ⁇ ⁇ 140°, and ⁇ ⁇ ⁇ .
  • ⁇ 60°
  • ⁇ 60°.
  • a first pre-tightening gap 8 is disposed between the concave tooth bottom surface 63 and the convex tooth top surface 74, and a second pre-tightening gap 9 is disposed between the concave tooth top surface 64 and the convex tooth bottom surface 73;
  • a third pre-tightening gap 10 is provided between the tooth surface 62 and the convex lower tooth surface 72.
  • the concave upper surface 61 is in close contact with the convex upper surface 71; the fourth side between the flank 51 and the side 23 is provided with a fourth Pre-tighten the gap 11.
  • the concave lower tooth surface 62 and the convex lower tooth surface 72 may also be in close contact, but the third pre-tightening gap 10 is provided between the two to reduce the manufacturing difficulty, save production cost, and improve processing. Efficiency; and, although the contact area is reduced, the concave upper surface 61 and the convex upper surface 71 can be better contacted during the cutting process, and the blade 2 can be effectively restrained from being separated from the sipe 5, and the blade 2 is restricted.
  • the concave upper tooth surface 61 and the convex upper tooth surface 71 can be applied to the blade 2 from the upper bottom surface 21 to the downward bottom surface 22, which can effectively reduce the load of the fastener 3 and extend the fastener 3
  • the service life, and can make the cutting tool can withstand greater cutting load and cutting impact, broaden the application range of cutting tools in the field of gravity cutting.
  • FIG. 4 and FIG. 5 show an embodiment of a non-rotating cutting tool according to the present invention.
  • This embodiment is basically the same as the previous embodiment, except that the blade body 1 is an elongated blade body, and the blade 2 and the blade body 1 are The connection structure is the same and will not be described here.
  • the bottom surface of the blade 2 has a substantially quadrangular structure.
  • the present invention is not limited thereto.
  • the bottom surface of the blade 2 may be designed to be circular, polygonal or the like according to actual needs.
  • each of the blades 2 and the blade body 1 in contact with the blade body 1 has a concave-convex fitting structure.
  • the present invention is not limited thereto, and depending on the force distribution of the blade 2, it may only be subjected to
  • the side 23 having a larger force is designed to have a concave-convex fitting structure with the blade body 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

本发明公开了一种切削刀具，包括刀体（1）、刀片（2）和紧固件（3），所述刀体（1）上设有至少一组容屑槽（4）和刀槽（5），所述刀体（1）通过紧固件（3）将刀片（2）固定于刀槽（5）内，所述刀槽（5）由刀槽侧面（51）和刀槽底面（52）组成，所述刀片（2）由上底面（21）、下底面（22）以及连接上底面（21）和下底面（22）的侧面（23）组成，所述刀片（2）的侧面（23）与所述刀槽侧面（51）之间设有可防止侧面（23）相对刀槽侧面（51）向外倾斜的凹凸配合结构。该切削刀具具有结构稳定、能有效抑制振动、可提高抗冲击能力的优点。

Description

切削刀具
【技术领域】
本发明涉及金属切削加工领域， 尤其涉及切削刀具。
【背景技术】
切削刀具一般采用刀体和刀片侧面平面接触的方式进行连接。 这种刀具的刀体、 刀片制 作简单， 加工方便； 同时刀体、 刀片侧面精度较高时可以增大其有效接触面积， 提高传递的 扭矩， 加强刀片的抗冲击能力， 保证切削刀具的尺寸精度； 刀体、 刀片定位面的大面积接触 可以使刀片在承受较大的负载时， 定位面只发生微小的变形， 有效保证切削刀具在静态和加 工过程中尺寸精度的一致性， 提高了切削刀具在不同工况下的刀具稳定性。 由于采用平面定 位切削刀具具有上述优点， 此种切削刀具结构被广泛应用于旋转类刀具和非旋转类刀具中。
虽然这种平面定位结构有很多优点， 但是存在一些问题。 由于刀片烧结变形、 刀具和刀 片的夹具装夹误差、 加工误差、 检测误差以其装配误差的存在， 刀体和刀片的平面定位面虽 然可以被加工成平面度很好、 高精度的平面， 但是很难保证对应定位面完全重叠， 为了保证 切削刀具的抗冲击能力和尺寸的稳定性，一般优先保证刀片上底面附近侧面和刀槽侧面接触， 即刀槽侧面和刀槽底面之间夹角小于刀片侧面和刀片底面之间的夹角。 这种结构虽然在一定 程度上解决了切削刀具的误差对切削刀具性能的影响，但是， 当切削刀具承受较大的负载时， 刀片弹性变形加大， 刀片的侧面相对刀槽往外倾斜， 致使刀体和刀片的侧定位面脱离， 夹持 力只能靠紧固件来提供， 紧固件必产生较大幅度的变形， 从而使刀片发生较大的振动甚至崩 缺„
【发明内容】
本发明要解决的技术问题是克服现有技术的不足，提供一种结构稳定、能有效抑制振动、 可提高抗冲击能力的切削刀具。
为解决上述技术问题， 本发明采用以下技术方案：
一种切削刀具， 包括刀体、 刀片和紧固件， 所述刀体上设有至少一组容屑槽和刀槽， 所 述刀体通过紧固件将刀片固定于刀槽内， 所述刀槽由刀槽侧面和刀槽底面组成， 所述刀片由 上底面、 下底面以及连接上底面和下底面的侧面组成， 所述刀片的侧面与所述刀槽侧面之间 设有可防止侧面相对刀槽侧面向外倾斜的凹凸配合结构。
所述刀槽侧面上设有 M个凹锯齿，所述侧面上设有 N个凸锯齿，各凸锯齿分别置于对应 的凹锯齿中， 且 1≤M≤5， 1<N<5, N≤M。
所述凹锯齿与所述凸锯齿平行设置， 且所述凹锯齿和凸锯齿均与所述刀槽底面为非垂直 设置。
各凹锯齿由凹齿上牙面、 凹齿下牙面、 凹齿底面和凹齿顶面组成， 各凸锯齿由凸齿上牙 面、 凸齿下牙面、 凸齿底面和凸齿顶面组成， 所述凹齿上牙面和凹齿下牙面之间的夹角为 α， 所述凸齿上牙面和凸齿下牙面之间的夹角为 β， 40°≤α≤140°， 40°≤β≤140°。
所述凹齿上牙面和凹齿下牙面之间的夹角 α小于或等于所述凸齿上牙面和凸齿下牙面之 间的夹角 β。
所述凹齿底面与凸齿顶面之间设有第一预紧间隙， 所述凹齿顶面和凸齿底面之间设有第 二预紧间隙。
所述凹齿下牙面与凸齿下牙面之间设有第三预紧间隙， 所述凹齿上牙面与凸齿上牙面紧 密接触。
所述刀槽侧面与所述侧面之间设有第四预紧间隙。
与现有技术相比， 本发明的优点在于- 本发明的切削刀具， 刀体侧面和刀片侧面之间设有可防止侧面相对刀槽侧面向外倾斜的 凹凸配合结构， 使刀体、 刀片连接更加紧密可靠， 在切削过程中， 可以极大的减少刀片变形， 从而抑制、 衰减刀具的切削振动， 提高加工表面质量， 有效抑制刀片的崩缺； 同时凹凸配合 结构可以降低紧固件的负载， 延长紧固件的使用寿命； 另外凹凸配合结构可改善刀片的受力 分布， 提高刀具的稳定性， 使刀具可以承受更大的切削力， 拓宽切削刀具在重力切削领域的 应用范围。
【附图说明】
图 1是本发明的旋转式切削刀具实施例的立体结构示意图。
图 2是图 1的 Α_ Α旋转剖视放大图。
图 3是图 2的齿形放大图。
图 4是本发明的非旋转式切削刀具实施例的立体结构示意图。
图 5是图 4中 B处的放大图。
图中各标号表示：
1、 刀体； 2、 刀片； 21、 上底面； 22、 下底面； 23、 侧面； 3、 紧固件； 4、 容屑槽； 5、 刀槽； 51、 刀槽侧面； 52、 刀槽底面； 6、 凹锯齿； 61、 凹齿上牙面； 62、 凹齿下牙面； 63、 凹齿 底面； 64、 凹齿顶面； 7、 凸锯齿； 71、 凸齿上牙面； 72、 凸齿下牙面； 73、 凸齿底面； 74、 凸齿顶面； 8、 第一预紧间隙； 9、 第二预紧间隙； 10、 第三预紧间隙； 11、 第四预紧间隙。 【具体实施方式】 图 1至图 3示出了本发明的一种旋转式切削刀具实施例，该切削刀具包括刀体 1、刀片 2 和紧固件 3， 刀体 1为以自身中心轴为旋转中心的圆柱形刀体，该刀体 1上设有一组容屑槽 4 和刀槽 5， 刀体 1通过紧固件 3将刀片 2固定于刀槽 5内， 刀槽 5由刀槽侧面 51和刀槽底面 52组成， 刀片 2由上底面 21、下底面 22以及连接上底面 21和下底面 22的侧面 23组成， 刀 片 2的侧面 23与刀槽侧面 51之间设有可防止侧面 23相对刀槽侧面 51向外倾斜的凹凸配合 结构， 使刀体 1与刀片 2的连接更加紧密可靠， 在切削过程中， 可以极大的减少刀片 2的变 形， 从而抑制、 衰减刀具的切削振动， 提高加工表面质量， 有效抑制刀片 2的崩缺； 同时凹 凸配合结构可以降低紧固件 3的负载， 延长紧固件 3的使用寿命； 另外凹凸配合结构可改善 刀片 2的受力分布， 提高刀具的稳定性， 使刀具可以承受更大的切削力， 拓宽切削刀具在重 力切削领域的应用范围。
本实施例中， 刀槽侧面 51上设有 M个凹锯齿 6， 侧面 23上设有 N个凸锯齿 7， 各凸锯 齿 7分别置于对应的凹锯齿 6中， 且 1≤M≤5， 1<N<5 , N≤M， 本实施例 M=N=3。 凹锯齿 6 与凸锯齿 7平行设置，且凹锯齿 6和凸锯齿 7均与刀槽底面 52为非垂直设置。各凹锯齿 6由 凹齿上牙面 61、 凹齿下牙面 62、 凹齿底面 63和凹齿顶面 64组成， 各凸锯齿 7由凸齿上牙面 71、 凸齿下牙面 72、 凸齿底面 73和凸齿顶面 74组成， 凹齿上牙面 61和凹齿下牙面 62之间 的夹角为 α， 凸齿上牙面 71和凸齿下牙面 72之间的夹角为 β， 40°<α<140°, 40°<β<140°, 且 α≤β， 为保证刀体 1、 刀片 2的结构稳定性， 本实施例中， α=60°， β=60°。
本实施例中， 凹齿底面 63与凸齿顶面 74之间设有第一预紧间隙 8， 凹齿顶面 64和凸齿 底面 73之间设有第二预紧间隙 9;凹齿下牙面 62与凸齿下牙面 72之间设有第三预紧间隙 10， 凹齿上牙面 61与凸齿上牙面 71紧密接触;刀槽侧面 51与侧面 23之间设有第四预紧间隙 11。 通过设置各预紧间隙可以确保凹齿上牙面 61与凸齿上牙面 71紧密接触， 从而进一步保证刀 体 1与刀片 2的连接稳定性。
在其它实施例中， 凹齿下牙面 62与凸齿下牙面 72也可以设为紧密接触， 但是在二者之 间设置第三预紧间隙 10可以降低制作难度， 节约生产成本， 提高加工效率； 并且， 虽然是减 少了接触面积， 但在切削过程中， 凹齿上牙面 61和凸齿上牙面 71可以更好地接触， 仍可以 有效限制刀片 2脱离刀槽 5， 限制刀片 2的振动； 同时， 凹齿上牙面 61和凸齿上牙面 71可 以施加给刀片 2自上底面 21 向下底面 22方向的力， 可以有效降低紧固件 3的负载， 延长紧 固件 3的使用寿命， 并且可以使切削刀具能够承受更大的切削负载和切削冲击， 拓宽切削刀 具在重力切削领域的应用范围。
图 4和图 5示出了本发明的一种非旋转式切削刀具实施例， 本实施例与上一实施基本相 同， 区别仅在于刀体 1为长条形刀体， 刀片 2与刀体 1的连接结构相同， 在此不再赘述。 以上两个实施例中， 刀片 2的底面大致为四边形结构， 本发明不仅限于此， 根据实际需 求不同， 刀片 2的底面还可设计成圆形、 多边型等其它结构。
以上两个实施例中， 刀片 2每一个和刀体 1接触的侧面 23与刀体 1之间均为凹凸配合 结构， 本发明不仅限于此， 根据刀片 2受力分布不同， 还可仅将受力较大的侧面 23设计成 与刀体 1之间为凹凸配合结构。
上述只是本发明的较佳实施例， 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

权 利 ¾ ^
1、 一种切削刀具， 包括刀体 （1)、 刀片 （2) 和紧固件 （3)， 所述刀体 （1) 上设有至 少一组容屑槽（4)和刀槽（5)， 所述刀体（1)通过紧固件（3)将刀片（2)固定于刀槽（5) 内， 所述刀槽（5)由刀槽侧面（51)和刀槽底面（52)组成， 所述刀片（2) 由上底面（21)、 下底面（22) 以及连接上底面（21)和下底面 （22) 的侧面（23)组成， 其特征在于： 所述 刀片（2)的侧面（23)与所述刀槽侧面（51)之间设有可防止侧面（23)相对刀槽侧面（51) 向外倾斜的凹凸配合结构。
2、 根据权利要求 1所述的切削刀具， 其特征在于： 所述刀槽侧面 （51)上设有 M个凹 锯齿 （6)， 所述侧面 （23) 上设有 N个凸锯齿 （7)， 各凸锯齿 （7) 分别置于对应的凹锯齿
(6) 中， 且 1≤M≤5， 1<N<5, N≤M。
3、 根据权利要求 2所述的切削刀具， 其特征在于： 所述凹锯齿（6)与所述凸锯齿（7) 平行设置， 且所述凹锯齿 （6)和凸锯齿 （7)均与所述刀槽底面 （52) 为非垂直设置。
4、 根据权利要求 3所述的切削刀具， 其特征在于： 各凹锯齿（6) 由凹齿上牙面（61)、 凹齿下牙面（62)、凹齿底面（63)和凹齿顶面（64)组成，各凸锯齿（7)由凸齿上牙面（71)、 凸齿下牙面 （72)、 凸齿底面 （73)和凸齿顶面 （74) 组成， 所述凹齿上牙面 （61)和凹齿 下牙面（62)之间的夹角为 α， 所述凸齿上牙面（71)和凸齿下牙面 （72)之间的夹角为 β， 40。≤α≤140°， 40°≤β≤140°。
5、 根据权利要求 4所述的切削刀具， 其特征在于： 所述凹齿上牙面 （61)和凹齿下牙 面（62)之间的夹角 α小于或等于所述凸齿上牙面（71)和凸齿下牙面（72)之间的夹角 β。
6、 根据权利要求 4或 5所述的切削刀具， 其特征在于： 所述凹齿底面 （63) 与凸齿顶 面（74)之间设有第一预紧间隙 （8)， 所述凹齿顶面 （64)和凸齿底面 （73)之间设有第二 预紧间隙 (9)。
7、 根据权利要求 4或 5所述的切削刀具， 其特征在于： 所述凹齿下牙面 （62) 与凸齿 下牙面 （72) 之间设有第三预紧间隙 （10)， 所述凹齿上牙面 （61) 与凸齿上牙面 （71) 紧 密接触。
8、 根据权利要求 6所述的切削刀具， 其特征在于： 所述凹齿下牙面 （62) 与凸齿下牙 面 （72)之间设有第三预紧间隙 （10)， 所述凹齿上牙面 （61) 与凸齿上牙面 （71) 紧密接 触。
9、 根据权利要求 1至 5中任一项所述的切削刀具， 其特征在于： 所述刀槽侧面 （51) 与所述侧面 （23)之间设有第四预紧间隙 （11)。
10、根据权利要求 8所述的切削刀具，其特征在于：所述刀槽侧面（51)与所述侧面（23) 之间设有第四预紧间隙 （ 11 )。
PCT/CN2012/075286 2011-12-09 2012-05-10 切削刀具 WO2013082918A1 (zh)

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