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CN105345117B - Milling cutting insert and milling cutter - Google Patents

Milling cutting insert and milling cutter Download PDF

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Publication number
CN105345117B
CN105345117B CN201510922312.2A CN201510922312A CN105345117B CN 105345117 B CN105345117 B CN 105345117B CN 201510922312 A CN201510922312 A CN 201510922312A CN 105345117 B CN105345117 B CN 105345117B
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China
Prior art keywords
cutting
edge
corner
milling
adjacent
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CN105345117A (en
Inventor
江爱胜
王社权
刘敏
李屏
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Zhuzhou Cemented Carbide Cutting Tools Co Ltd
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Zhuzhou Cemented Carbide Cutting Tools Co Ltd
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Priority to CN201510922312.2A priority Critical patent/CN105345117B/en
Publication of CN105345117A publication Critical patent/CN105345117A/en
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    • 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
    • B23C5/08—Disc-type cutters
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0416—Irregular

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

Abstract

本发明公开了一种铣削刀片及铣削刀具，铣削刀片包括上表面、下表面、连接所述上表面和下表面的多个侧面以及位于相邻侧面之间的拐角面，所述侧面与上表面形成上切削刃，所述拐角面与上表面形成上拐角刃，相邻的上拐角刃具有不同的形状，本发明的铣削刀具包括刀体和开设在所述刀体上的多个刀槽，还包括上述的铣削刀片，所述铣削刀片装设在所述刀槽中，且相邻的刀槽中参与切削的上拐角刃为形状不同的两个上拐角刃。本发明的铣削刀片及铣削刀具具有可充分消除工件边缘毛刺、结构简单、能同时具备较大切削深度和较好断屑能力、切削负载小和切削效率高等优点。

The invention discloses a milling insert and a milling cutter. The milling insert includes an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface, and a corner surface between adjacent side surfaces. The side surfaces and the upper surface forming an upper cutting edge, the corner surface and the upper surface form an upper corner edge, and the adjacent upper corner edges have different shapes. The above-mentioned milling insert is also included, the milling insert is installed in the kerf, and the upper corner edges involved in cutting in adjacent kerfs are two upper corner edges with different shapes. The milling insert and milling tool of the invention have the advantages of fully eliminating the edge burr of the workpiece, simple structure, large cutting depth and good chip breaking ability, small cutting load and high cutting efficiency.

Description

Milling cutting insert and milling cutter
Technical field
The present invention relates to metal cutting process field more particularly to a kind of milling cutting inserts and milling cutter.
Background technique
Blade is in milling process, and Chip grooves have large effect to the shape of chip, and the shape of chip is to blade Service life and the size of cutting force can produce large effect.Broken chip can reduce the load of cutting edge, extend cutter Service life, the chip easily snapped off can shorten the time of contact of chip and blade upper surface groove profile, reduce the cutting heat of blade simultaneously Reduce cutting force.Cohesive material processing in, due to the characteristic of material itself, chip is generally not easily broken, long chip be easy and Finished surface collides to reduce suface processing quality, and especially when blade incision, cutting out workpiece, the edge of work is easy A large amount of burr is generated, in order to improve blade face processing quality and reduce the burr of blade edge.The a large amount of essence of people's investment Power studies the shape and trench structure of blade, to realize the optimal control to chip.But Chip grooves optimization, processing is viscous Property material when, be difficult to make chip breaking sufficiently to eliminate the collision for avoiding chip, the burr of the especially edge of work is difficult to disappear It removes.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide that a kind of structure is simple, can have simultaneously The standby milling cutting insert and milling cutter small compared with cutting depth and preferable chip breaking ability, cutting load.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of milling cutting insert, including upper surface, lower surface, the multiple sides and position for connecting the upper and lower surfaces Corner surface between adjacent side, the side and upper surface form upper cutting edge, and the corner surface and upper surface are formed Turning sword, adjacent upper turning cutlery have different shapes.
As a further improvement of the above technical scheme:
The corner surface and lower surface form lower turning sword, and adjacent lower turning cutlery has different shapes.
The upper turning tooth shape shape at interval is identical.
The corner surface is inclined-plane, and in identical cutting direction, the workpiece entrance angle on adjacent inclined-plane is different, interval The workpiece entrance angle on inclined-plane is identical.
The corner surface is arc surface or inclined-plane, and arc surface and inclined-plane are spaced apart, the arc surface and the upper table Face forms Circular Nose Cutting Edge, and the inclined-plane and the upper surface form inclined edge.
The corner surface is arc surface, and adjacent arc surface has different curvature.
The adjacent upper cutting edge of any two and the upper turning sword for connecting the adjacent upper cutting edge are formed and are cut Unit, the wherein upper cutting edge in the upper cutting unit is main cutting edge, and another upper cutting edge is end cutting edge, institute When stating cutting unit participation cutting, the upper cutting unit forms workpiece as the upper cutting edge and workpiece surface of main cutting edge Entrance angle, in identical cutting direction, the workpiece entrance angle of upper cutting edge of the adjacent upper cutting unit as main cutting edge It is different.
The upper cutting unit at interval is identical as the workpiece entrance angle of the upper cutting edge of main cutting edge.
The side and lower surface form lower cutting edge, and the corner surface and lower surface form lower turning sword, any two It the adjacent lower cutting edge and connects the adjacent undercuts and cuts the lower turning sword of sword and form lower cutting unit, the lower cutting is singly A wherein lower cutting edge in member is main cutting edge, and another lower cutting edge is end cutting edge, and the lower cutting unit participates in When cutting, which forms workpiece entrance angle as the lower cutting edge and workpiece surface of main cutting edge, cuts identical It cuts on direction, the workpiece entrance angle of lower cutting edge of the adjacent lower cutting unit as main cutting edge is different, the lower cutting at interval Unit is identical as the workpiece entrance angle of the lower cutting edge of main cutting edge.
The side that any two are spaced apart forms the side-locating face of milling cutting insert, and two sides of each side-locating face Angle γ between face is identical.
A kind of milling cutter further includes above-mentioned milling cutter including cutter hub and the multiple cutter grooves being provided on the cutter hub Piece, the milling cutting insert are installed in the cutter groove, and the upper turning sword that cutting is participated in adjacent cutter groove is variform Two upper turning swords.
As a further improvement of the above technical scheme:
Bottom surface in the cutter groove at interval is equipped with groove, the upper turning sword at corresponding interval on the upper surface of milling cutting insert Equipped with insert groove mark.
Compared with the prior art, the advantages of the present invention are as follows:
(1) milling cutting insert of the invention, adjacent upper turning cutlery have different shapes, in cutting, adjacent turning Chip can be divided into two sections of independent shapes at an angle to each other by sword, reduced the effective cutting depth of single upper turning sword, increased The actual cut of turning sword on this has been added to feed, segmentation carries out cutting to workpiece and effectively reduces blade cutting force and in cutting width Degree direction forms the chip of multistage frangibility to be substantially reduced chip and the collision of finished surface and reach raising surface processing matter The purpose of amount, meanwhile, when turning sword cuts into, cuts out workpiece, successively it can lunge capable extruding by multiple opposite side echinid from different directions, So that chip is sufficiently fractureed and effectively eliminate burr, when especially processing cohesive material workpiece, effect is fairly obvious.
(2) chip effectively can be divided into multistage frangibility and be cut by milling cutter of the invention using milling cutting insert of the invention Bits, milling cutter cutting is more brisk, improves stock-removing efficiency, while can effectively reduce burr, improves suface processing quality.
Detailed description of the invention
Fig. 1 is the three-dimensional structure diagram of the first embodiment of milling cutting insert of the present invention.
Fig. 2 is the main view of the first embodiment of milling cutting insert of the present invention.
Fig. 3 is the three-dimensional structure diagram of second of embodiment of milling cutting insert of the present invention.
Fig. 4 is the main view of second of embodiment of milling cutting insert of the present invention.
Fig. 5 is the three-dimensional structure diagram of the third embodiment of milling cutting insert of the present invention.
Fig. 6 is the main view of the third embodiment of milling cutting insert of the present invention.
Fig. 7 is equipped with the stereochemical structure of the cutter hub of the milling cutter of the milling cutting insert of the first embodiment of the invention；
Fig. 8 is equipped with the stereochemical structure of the milling cutter of the milling cutting insert of the first embodiment of the invention；
Fig. 9 is equipped with the three-dimensional structure diagram of the cutter hub of the milling cutter of the milling cutting insert of second of embodiment of the invention；
Figure 10 is equipped with the three-dimensional structure diagram of the milling cutter of the milling cutting insert of second of embodiment of the invention.
Figure 11 is equipped with the three-dimensional structure diagram of the milling cutter of the milling cutting insert of the third embodiment of the invention.
Each label indicates in figure:
1, cutter hub；11, insert groove mark；2, upper surface；21, upper cutting edge；3, lower surface；31, lower cutting edge；4, side； 5, corner surface；51, upper turning sword；511, arc surface；512, Circular Nose Cutting Edge；521, inclined-plane；522, inclined edge；52, lower turning sword；61, Upper cutting unit；62, lower cutting unit；8, cutter groove；81, groove.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
Figures 1 and 2 show that the first embodiment of milling cutting insert of the present invention, which includes upper surface 2, following table Face 3, multiple sides 4 of connection upper surface 2 and lower surface 3 and the corner surface 5 between adjacent side 4, side 4 and upper table Face 2 forms upper cutting edge 21, and corner surface 5 and upper surface 2 form upper turning sword 51, and adjacent upper turning sword 51 has different shapes The workpiece entrance angle of shape, i.e., adjacent upper turning sword 51 is different, and in cutting, chip can be divided by adjacent upper turning sword 51 Two sections of independent shapes at an angle to each other, reduce effective cutting depth of single upper turning sword 51, while increasing turning on this The actual cut of sword 51 is fed, and segmentation, which cut to workpiece, to be effectively reduced blade cutting force and formed in cutting width direction The chip of multistage frangibility, so that it is substantially reduced chip and the collision of finished surface achievees the purpose that improve surface quality, meanwhile, When upper turning sword 51 cuts into, cuts out workpiece, it successively can lunge capable extruding by multiple opposite side echinid from different directions, keep chip abundant It fractures, effectively eliminates burr, when especially processing cohesive material workpiece, effect is fairly obvious.
In the present embodiment, upper 51 shape of turning sword at interval is identical, the peace convenient for the processing of milling cutting insert and on cutter Dress.
In the present embodiment, corner surface 5 is arc surface 511 or inclined-plane 521, and arc surface 511 and inclined-plane 521 are spaced apart, Arc surface 511 and upper surface 2 form Circular Nose Cutting Edge 512, and inclined-plane 521 and upper surface 2 form inclined edge 522, Circular Nose Cutting Edge 512 and inclined edge 522 are spaced apart, and both can guarantee that chip can be divided into two sections of independences at an angle to each other by adjacent upper turning sword 51 in cutting Shape, reduces effective cutting depth of single upper turning sword 51, while increasing the actual cut feeding of turning sword 51 on this, The chip of multistage frangibility is formed in cutting width direction, improve chip breaking ability and extends the service life of milling cutting insert and cuts greatly The working ability of depth is cut, while being convenient for the processing of milling cutting insert.
In the present embodiment, the adjacent upper cutting edge 21 of any two and the upper turning sword for connecting the adjacent upper cutting edge 21 51 form upper cutting unit 61, and the wherein upper cutting edge 21 in upper cutting unit 61 is main cutting edge, another upper cutting Sword 21 is end cutting edge, when upper cutting unit 61 participates in cutting, upper cutting unit 61 as main cutting edge upper cutting edge 21 and Workpiece surface forms workpiece entrance angle, and in identical cutting direction, adjacent upper cutting unit 61 is as the upper of main cutting edge The workpiece entrance angle of cutting edge 21 is different, and the upper cutting unit 61 at interval is cut as the workpiece of the upper cutting edge 21 of main cutting edge Angle is identical, and a upper cutting edge 21 in each upper cutting unit 61 is the main cutting edge cut side surface of workpiece, another Upper cutting edge 21 is the end cutting edge cut the plane of workpiece, and each upper cutting unit 61 can complete milling cutting insert Upper surface 2 complete cutting function, the upper cutting edge 21 in each upper cutting unit 61 as main cutting edge, in cutting direction The upper angle between workpiece surface is respectively formed the workpiece entrance angle of main cutting edge, the main cutting of adjacent upper cutting unit 61 The workpiece entrance angle of sword is different, when cutting depth is larger, in adjacent upper cutting unit 61 between main cutting edge and finished surface Different entrance angles is formed, chip is divided into two sections of independent shapes at an angle to each other, reduces effectively cutting for single main cutting edge Depth is cut, while increasing the actual cut feeding of the main cutting edge, forms the chip of multistage frangibility in cutting width direction, When cutting depth is larger, on the main cutting edge and different shape of different entrance angles when the combination of turning sword 51 cutting, maximum can be incited somebody to action Chip is divided into five sections of independent shapes, sufficiently lowers the effective contact length of single upper cutting unit 61 and improves chip Thickness forms the chip of multistage frangibility in cutting width direction, and therefore, milling cutting insert of the invention has preferable chip breaking ability With lower cutting force, greatly extend the service life of milling cutting insert and the working ability of full depth.In the present embodiment, The workpiece entrance angle α of the main cutting edge of upper cutting unit 61 including Circular Nose Cutting Edge 512 is identical, the upper cutting list including inclined edge 522 The workpiece entrance angle β of the main cutting edge of member 61 is identical, and workpiece entrance angle α and β are spaced apart, in order to guarantee cutting effect, 35 °≤ α≤55 °, 35 °≤β≤55 °, 1 °≤alpha-beta≤15 °, in the present embodiment, α=48 °, β=42 °.
In the present embodiment, side 4 and lower surface 3 form lower cutting edge 31, and corner surface 5 and lower surface 3 form lower turning sword 52, it the adjacent lower cutting edge 31 of any two and connects the adjacent undercuts and cuts the lower turning sword 52 of sword 31 and form lower cutting unit 62, the wherein lower cutting edge 31 in lower cutting unit 62 is main cutting edge, and another lower cutting edge 31 is end cutting edge, under When cutting unit 62 participates in cutting, which forms workpiece as the lower cutting edge 31 and workpiece surface of main cutting edge Entrance angle, in identical cutting direction, adjacent lower cutting unit 62 is cut as the workpiece of the lower cutting edge 31 of main cutting edge Enter angle difference, the lower cutting unit 62 at interval is identical as the workpiece entrance angle of the lower cutting edge 31 of main cutting edge.
In order to guarantee upper surface 2, on lower surface 3, the upper cutting unit 61 of different workpieces entrance angle can be accurately positioned and revolve It delivers for reusing, the side 4 that any two are spaced apart forms the side-locating face of milling cutting insert, and the two of each side-locating face Angle γ between a side 4 is identical, in the present embodiment, γ=90 °.
In the present embodiment, milling cutting insert has eight upper cutting units 61 and eight lower cutting units 62, has on eight Turning sword 51 and eight lower turning swords 52, upper turning sword 51 and lower turning sword 52 are spaced apart by Circular Nose Cutting Edge 512 and inclined edge 522 Composition.The length of the inclined edge 522 is L, and the distance of 512 two-end-point of Circular Nose Cutting Edge is L ', and the workpiece of the inclined edge 522 is cut Angle is β ', in order to guarantee that Circular Nose Cutting Edge 512 and inclined edge 522 have outstanding all burr processing capacities, should be met: 1.1L≤L '≤ 1.5L, in the present embodiment of 20 °≤β '≤50 °, L '=1.2L, β '=22.5 °.
Fig. 3 and Fig. 4 shows second of embodiment of milling cutting insert of the present invention, and the embodiment and the first embodiment are basic Identical, difference is only that: corner surface 5 be all be arc surface 511, adjacent arc surface 511 has different curvature, i.e., upper turning Sword 51 is Circular Nose Cutting Edge 512, but adjacent Circular Nose Cutting Edge 512 has different curvature, equally can achieve the present invention to be reached Technical effect.In the present embodiment, there are six upper cutting units 61 for milling cutting insert tool, including cutting on the first Circular Nose Cutting Edge 512 The workpiece entrance angle α for cutting the main cutting edge of unit 61 is identical, the main cutting of the upper cutting unit 61 including second of Circular Nose Cutting Edge 512 The workpiece entrance angle β of sword is identical, and 50 °≤α≤70 °, 50 °≤β≤70 °, 1 °≤alpha-beta≤15 °, in the present embodiment, α=65 °, β= 55 °, γ=120 °, the milling cutting insert in the present embodiment does not descend cutting unit 62.
In order to guarantee that Circular Nose Cutting Edge 512 and inclined edge 522 have outstanding all burr processing capacities, adjacent Circular Nose Cutting Edge 512 Fillet be respectively R, R ', should meet: 0.3 R≤R '≤0.8R, in the present embodiment, R '=0.5R.
Fig. 5 and Fig. 6 shows the third embodiment of milling cutting insert of the present invention, and the embodiment and the first embodiment are basic Identical, difference is only that: corner surface 5 be all be inclined-plane 521, in identical cutting direction, the workpiece on adjacent inclined-plane 521 is cut Enter angle difference, the workpiece entrance angle on the inclined-plane 521 at interval is identical, i.e., upper turning sword 51 is inclined edge 522, but adjacent inclined edge 522 have different workpiece entrance angles relative to blade center, and two kinds of different workpieces entrance angle inclined edges 522 are spaced apart, equally It can achieve present invention technical effect to be achieved.
In order to guarantee that inclined edge 522 has outstanding all burr processing capacities, the length of the adjacent inclined edge 522 is respectively L, the workpiece entrance angle of L ', the adjacent inclined edge 522 are respectively α ', β ', should be met: 20 °≤α ', β '≤50 °, and 1 °≤α '- β '≤15 °, 0.6L≤L '≤1.4L, in the present embodiment, L '=1.2L, α '=24 °, β '=21 °, remaining technical characteristic and the first Embodiment is identical.
Fig. 7 and Fig. 8 is the three-dimensional structure diagram for installing the milling cutter of milling cutting insert of the first embodiment of the invention, including Cutter hub 1 and four cutter grooves 8 being provided on cutter hub, further include the milling cutting insert in four the first above-mentioned embodiments, milling cutter Piece is installed in cutter groove 8, and the upper turning sword 51 that cutting is participated in adjacent cutter groove 8 is variform two upper turning swords 51, so that chip is effectively divided into multistage frangibility chip, keeps milling cutter cutting more brisk, improve stock-removing efficiency.
In the present embodiment, in the present embodiment, bottom surface in cutter groove 8 is equipped with groove 81, right on the upper surface 2 of milling cutting insert The upper turning sword 51 that should be spaced is equipped with insert groove mark 11, convenient for the installation of milling cutting insert, to guarantee replacing milling cutting insert again After installation, the upper turning sword 51 that cutting is participated in adjacent cutter groove 8 is variform two upper turning swords 51.
Fig. 9 and Figure 10 is the three-dimensional structure diagram for installing the milling cutter of milling cutting insert of second of embodiment of the invention, Structure and the structure of the milling cutter in Fig. 7 and Fig. 8 are essentially identical, the difference is that only the structure of cutter groove 8 and milling cutting insert.
Figure 11 is the three-dimensional structure diagram for installing the milling cutter of milling cutting insert of the third of the invention embodiment, structure with The structure of milling cutter in Fig. 7 and Fig. 8 is essentially identical, the difference is that only the structure of milling cutting insert.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment, Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.

Claims (12)

1.一种铣削刀片，包括上表面（2）、下表面（3）、连接所述上表面（2）和下表面（3）的多个侧面（4）以及位于相邻侧面（4）之间的拐角面（5），所述侧面（4）与上表面（2）形成上切削刃（21），所述拐角面（5）与上表面（2）形成上拐角刃（51），其特征在于：相邻的上拐角刃（51）具有不同的形状，任意两个相邻的所述上切削刃（21）以及连接该相邻上切削刃（21）的上拐角刃（51）组成上切削单元（61），相邻所述上切削单元（61）能在铣削刀具上组合使用且其上拐角刃（51）的工件切入角不同。1. A milling insert comprising an upper surface (2), a lower surface (3), a plurality of side surfaces (4) connecting the upper surface (2) and the lower surface (3), and a plurality of side surfaces (4) located between adjacent side surfaces (4) The corner surface (5) between the two sides, the side surface (4) and the upper surface (2) form an upper cutting edge (21), the corner surface (5) and the upper surface (2) form an upper corner edge (51), which It is characterized in that: the adjacent upper corner edges (51) have different shapes, and any two adjacent upper cutting edges (21) and the upper corner edges (51) connecting the adjacent upper cutting edges (21) are composed of An upper cutting unit (61), the adjacent upper cutting units (61) can be used in combination on a milling tool, and the upper corner edges (51) of the upper cutting units (51) have different cutting angles to the workpiece. 2.根据权利要求1所述的铣削刀片，其特征在于：所述拐角面（5）与下表面（3）形成下拐角刃（52），相邻的下拐角刃（52）具有不同的形状。2. The milling insert according to claim 1, characterized in that: the corner surface (5) and the lower surface (3) form a lower corner edge (52), and adjacent lower corner edges (52) have different shapes . 3.根据权利要求1或2所述的铣削刀片，其特征在于：间隔的上拐角刃（51）形状相同。3. The milling insert according to claim 1 or 2, wherein the spaced upper corner edges (51) have the same shape. 4.根据权利要求3所述的铣削刀片，其特征在于：所述拐角面（5）是斜面（521），所述斜面（521）与上表面（2）相交形成斜刃（522），在相同的切削方向上，相邻的斜刃（522）的工件切入角不同，间隔的斜刃（522）的工件切入角相同。4. The milling insert according to claim 3, characterized in that: the corner surface (5) is an inclined surface (521), and the inclined surface (521) intersects with the upper surface (2) to form a beveled edge (522), In the same cutting direction, the workpiece cutting angles of adjacent beveled edges (522) are different, and the workpiece cutting angles of the spaced beveled edges (522) are the same. 5.根据权利要求3所述的铣削刀片，其特征在于：所述拐角面（5）是圆弧面（511）或斜面（521），且圆弧面（511）和斜面（521）间隔分布，所述圆弧面（511）与所述上表面（2）形成圆弧刃（512），所述斜面（521）与所述上表面（2）形成斜刃（522）。5 . The milling insert according to claim 3 , wherein the corner surface ( 5 ) is a circular arc surface ( 511 ) or an inclined surface ( 521 ), and the circular arc surface ( 511 ) and the inclined surface ( 521 ) are distributed at intervals. 6 . , the arc surface (511) and the upper surface (2) form an arc edge (512), and the inclined surface (521) and the upper surface (2) form an oblique edge (522). 6.根据权利要求3所述的铣削刀片，其特征在于：所述拐角面（5）是圆弧面（511），且相邻的圆弧面（511）具有不同的曲率。6 . The milling insert according to claim 3 , wherein the corner surface ( 5 ) is a circular arc surface ( 511 ), and adjacent circular arc surfaces ( 511 ) have different curvatures. 7 . 7.根据权利要求3所述的铣削刀片，其特征在于：所述上切削单元（61）中的其中一条上切削刃（21）是主切削刃，另一条上切削刃（21）是副切削刃，所述上切削单元（61）参与切削时，所述上切削单元（61）作为主切削刃的上切削刃（21）与工件表面形成工件切入角，在相同的切削方向上，相邻的上切削单元（61）作为主切削刃的上切削刃（21）的工件切入角不同。7 . The milling insert according to claim 3 , wherein one of the upper cutting edges ( 21 ) in the upper cutting unit ( 61 ) is a major cutting edge, and the other upper cutting edge ( 21 ) is a secondary cutting edge. 8 . When the upper cutting unit (61) participates in cutting, the upper cutting edge (21) of the upper cutting unit (61) as the main cutting edge forms a workpiece cutting angle with the workpiece surface, and in the same cutting direction, adjacent The upper cutting unit (61) as the main cutting edge and the upper cutting edge (21) have different penetration angles of the workpiece. 8.根据权利要求7所述的铣削刀片，其特征在于：间隔的上切削单元（61）作为主切削刃的上切削刃（21）的工件切入角相同。8 . The milling insert according to claim 7 , wherein the upper cutting edges ( 21 ) of the spaced upper cutting units ( 61 ) have the same penetration angle into the workpiece as the main cutting edges. 9 . 9.根据权利要求8所述的铣削刀片，其特征在于：所述侧面（4）与下表面（3）形成下切削刃（31），所述拐角面（5）与下表面（3）形成下拐角刃（52），任意两个相邻的所述下切削刃（31）以及连接该相邻下切削刃（31）的下拐角刃（52）组成下切削单元（62），所述下切削单元（62）中的其中一条下切削刃（31）是主切削刃，另一条下切削刃（31）是副切削刃，所述下切削单元（62）参与切削时，该下切削单元（62）作为主切削刃的下切削刃（31）与工件表面形成工件切入角，在相同的切削方向上，相邻的下切削单元（62）作为主切削刃的下切削刃（31）的工件切入角不同，间隔的下切削单元（62）作为主切削刃的下切削刃（31）的工件切入角相同。9. The milling insert according to claim 8, characterized in that: the side surface (4) and the lower surface (3) form a lower cutting edge (31), and the corner surface (5) and the lower surface (3) form a lower cutting edge (31) A lower corner edge (52), any two adjacent lower cutting edges (31) and a lower corner edge (52) connecting the adjacent lower cutting edges (31) form a lower cutting unit (62), the lower One of the lower cutting edges (31) in the cutting unit (62) is a major cutting edge, and the other lower cutting edge (31) is a minor cutting edge. When the lower cutting unit (62) participates in cutting, the lower cutting unit ( 62) The lower cutting edge (31) as the main cutting edge forms a workpiece penetrating angle with the surface of the workpiece, and in the same cutting direction, the adjacent lower cutting unit (62) serves as the workpiece of the lower cutting edge (31) of the main cutting edge The cut-in angles are different, and the cut-in angles of the workpieces of the lower cutting edges (31) of the spaced lower cutting units (62) as the main cutting edges are the same. 10.根据权利要求3所述的铣削刀片，其特征在于：任意两个间隔分布的所述侧面（4）形成铣削刀片的侧定位面，且各侧定位面的两个侧面（4）之间的夹角γ相同。10. The milling insert according to claim 3, characterized in that: any two side surfaces (4) distributed at intervals form a side positioning surface of the milling insert, and between the two side surfaces (4) of each side positioning surface The included angle γ is the same. 11.一种铣削刀具，包括刀体（1）和开设在所述刀体上的多个刀槽（8），其特征在于：还包括多个权利要求1至10中任一项所述的铣削刀片，所述铣削刀片装设在所述刀槽（8）中，且相邻的刀槽（8）中参与切削的上拐角刃（51）为形状不同的两个上拐角刃（51）。11. A milling cutter, comprising a cutter body (1) and a plurality of tool grooves (8) provided on the cutter body, characterized in that it further comprises a plurality of the cutters according to any one of claims 1 to 10. A milling insert, the milling insert is installed in the kerf (8), and the upper corner edges (51) participating in cutting in adjacent kerfs (8) are two upper corner edges (51) with different shapes . 12.根据权利要求11所述的铣削刀具，其特征在于：间隔的所述刀槽（8）内的底面上设有凹槽（81），铣削刀片的上表面（2）上对应间隔的上拐角刃（51）设有刀片槽标（11）。12 . The milling tool according to claim 11 , wherein grooves ( 81 ) are provided on the bottom surfaces of the spaced kerfs ( 8 ), and the upper surfaces ( 2 ) of the milling inserts are correspondingly spaced on the upper surface ( 2 ). The corner edge (51) is provided with an insert groove mark (11).
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