CN107900429A - A kind of slotting milling cutter of cutting edge introversion - Google Patents

A kind of slotting milling cutter of cutting edge introversion Download PDF

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Publication number
CN107900429A
CN107900429A CN201711213780.8A CN201711213780A CN107900429A CN 107900429 A CN107900429 A CN 107900429A CN 201711213780 A CN201711213780 A CN 201711213780A CN 107900429 A CN107900429 A CN 107900429A
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CN
China
Prior art keywords
cutting edge
blade
cutter
angle
introversion
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Pending
Application number
CN201711213780.8A
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Chinese (zh)
Inventor
魏兆成
王敏杰
翟东延
何少林
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Dalian University of Technology
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Dalian University of Technology
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Publication date
Application filed by Dalian University of Technology filed Critical Dalian University of Technology
Priority to CN201711213780.8A priority Critical patent/CN107900429A/en
Publication of CN107900429A publication Critical patent/CN107900429A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles

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

Abstract

The present invention discloses a kind of slotting milling cutter of cutting edge introversion, including：Multigroup blade assembly of close tooth installation on cutter hub and cutter hub front end cutterhead；Blade assembly described in every group has one or two blade；When blade assembly described in every group has a blade, blade cutting edge introversion installation, it is obtuse angle to make cutter tool cutting edge angle；When blade assembly described in every group has two blades, which arranges in cutterhead radial misalignments, and all introversions of inside and outside blade cutting edge are installed, and it is obtuse angle to make cutter tool cutting edge angle.The slotting milling cutter of cutting edge introversion of the present invention, can realize the slotting Milling Machining of identical dinting depth, without avoiding inserting milling top knife by constantly reducing dinting depth, so as to substantially reduce the retained material of workpiece bottom.

Description

A kind of slotting milling cutter of cutting edge introversion
Technical field
The invention belongs to Milling Process Cutting tool field of structural design, is related to the innovation of cutter structure, is related specifically to one kind The slotting milling cutter of cutting edge introversion.
Background technology
Insert Milling Machining a big feature be cutter feed motion vertically so that cutter radial cutting force is small, it is allowed to knife Tool cantilevered length is larger, is very suitable for deep chamber, deep trench and the part processing with thin-walled feature.It is sharp in actual production With slotting miller skill processing mold cavity, integral wheel, blisk when part, processing efficiency can be lifted at double, therefore insert milling Technique has broad application prospects.
At present, there is slotting milling cutter product in the International Tool company such as mountain height, Iscar, Ken Na, Sandvik.These are inserted Milling cutter has dedicated slotting milling cutter, also there is what is developed from square shoulder milling, face mill cutter.Existing these insert milling Knife is after blade installation, and usual blade cutting edge is in horizontal or outward-dipping, i.e., the tool cutting edge angle of cutter is less than or equal to 90 °, i.e., existing Milling cutter is inserted in commercialization, is typically cutting edge flare or level.
Using existing tool sharpening, when radial cutting width is larger, the cutter structure of cutting edge flare can cause larger Radial component, easily causes cutting vibration, so as to restrict processing efficiency, influences cutter life.Further, since tool cutting edge angle be less than etc. In 90 °, for the workpiece of bottom surface level, can not realize identical dinting depth insert milling, it is necessary to by constantly reduce dinting depth come Avoid inserting milling top knife.So as to cause workpiece bottom to have substantial amounts of workpiece material remaining, subsequently need to increase process to remove these Residual materials, so as to reduce overall processing efficiency, weaken the odds for effectiveness of slotting Milling Machining.
The content of the invention
According to above-mentioned technical problem, a kind of slotting milling cutter of cutting edge introversion is proposed, lead to for solving existing slotting Milling Machining Cross and constantly reduce dinting depth to avoid the problem that inserting milling top knife, reduction dinting depth causes workpiece bottom to remain more work Part material is specially removed, it is necessary to increase process, so as to reduce overall processing efficiency, weakens the odds for effectiveness of slotting Milling Machining Shortcoming.The technological means that the present invention uses is as follows：
A kind of slotting milling cutter of cutting edge introversion, including：Multigroup rule row of close tooth installation on cutter hub and cutter hub front end cutterhead The blade assembly of row；Blade assembly described in every group has one or two blade；When blade assembly described in every group has a knife During piece, blade cutting edge introversion installation, it is obtuse angle to make cutter tool cutting edge angle；, should when blade assembly described in every group has two blades Two blades are arranged in cutterhead radial misalignments, and all introversions of inside and outside blade cutting edge are installed, and it is obtuse angle to make cutter tool cutting edge angle.
It is indexable using triangle or parallelogram as preferably when blade assembly described in every group has a blade The acute angle cusp of blade is as point of a knife, and it is Kr to make cutter tool cutting edge angle, and cutter auxiliary angle is Kr ', then Kr >=93 ° and Kr ' >=2 °.
As preferably when blade assembly described in every group has two blades, which arranges in cutterhead radial misalignments Row, outer blades, as point of a knife, make outer blades install using the acute angle cusp of triangle or parallelogram indexable insert tip, throw away tip Tool cutting edge angle afterwards is Kr1, auxiliary angle Kr1', then Kr1>=93 ° and Kr1′≥2°。
Returned as preferred inboard blade using any cusp of indexable insert tip, throw away tip as point of a knife, any cusp of inboard blade Turn radius and be less than tool radius, it is Kr to make the tool cutting edge angle after inboard blade installation2, then Kr2≥93°。
It is installed on as the preferred blade assembly by blade fastening accessory on the cutterhead of cutter hub front end.
Compared with prior art, the slotting milling cutter of cutting edge introversion of the present invention, can realize identical dinting depth Slotting Milling Machining, without by constantly reduce dinting depth avoid insert milling top knife, so as to substantially reduce the residual of workpiece bottom Material.In addition, blade introversion is conducive to cut down the radial cutting force of slotting Milling Machining, reduce cutting vibration.Blade introversion and footpath To dislocation so that inside and outside point of a knife realizes a point bits on the premise of same axial level is kept, and is conducive to increase cutting width, reduces Cutting force, cutting heat, so as to improve processing efficiency, extend cutter life.
Brief description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is that 1 cutting edge introversion formula of the embodiment of the present invention inserts milling cutter schematic diagram.
Fig. 2 is that 2 cutting edge introversion dislocation type of the embodiment of the present invention inserts milling cutter schematic diagram.
Fig. 3 is that usually slotting Milling Machining progressively reduces dinting depth schematic diagram (a in figureeFor radial cutting width, S is to insert milling Step pitch).
Fig. 4 is that milling cutter A is inserted in cutting edge introversion of the present invention.
Fig. 5 is that common cutting edge flare plugs in milling cutter B.
Fig. 6 is the slotting milling experimental rig of the present invention.
Fig. 7 is the slotting milling test piece of the present invention.
Fig. 8 is the Cutting Force Signal figure for plugging in milling cutter B processing.
Fig. 9 is the Cutting Force Signal figure of the plug in milling cutter A processing of the present invention.
Figure 10 is the cutting vibration signal graph for plugging in milling cutter B processing.
Figure 11 is the cutting vibration signal graph of the plug in milling cutter A processing of the present invention.
Wherein：1st, cutter hub I, 2, blade fastening accessory I, 3, indexable insert tip, throw away tip,
4th, cutter hub II, 5, blade fastening accessory II, 6, outer blades, 7, inboard blade.
Embodiment
A kind of slotting milling cutter of cutting edge introversion, including：Multigroup rule row of close tooth installation on cutter hub and cutter hub front end cutterhead The blade assembly of row；The blade assembly is installed on the cutterhead of cutter hub front end by blade fastening accessory.
When blade assembly described in every group has a blade, using the sharp of triangle or parallelogram indexable insert tip, throw away tip The top of the horn point is as point of a knife, and it is Kr to make cutter tool cutting edge angle, and cutter auxiliary angle is Kr ', then Kr >=93 ° and Kr ' >=2 °.
When blade assembly described in every group has two blades, which arranges in cutterhead radial misalignments, outer side tool Piece, as point of a knife, makes the tool cutting edge angle after outer blades installation using the acute angle cusp of triangle or parallelogram indexable insert tip, throw away tip For Kr1, auxiliary angle Kr1', then Kr1>=93 ° and Kr1′≥2°。
The inboard blade is using any cusp of indexable insert tip, throw away tip as point of a knife, the revolution half of any cusp of inboard blade Footpath is less than tool radius.It is Kr to make the tool cutting edge angle after inboard blade installation2, then Kr2≥93°。
The slotting milling cutter of cutting edge introversion of the present invention, available for realizing that identical dinting depth inserts Milling Machining, that is, inserts milling The dinting depth of processing is identical, it is not necessary to eliminates top knife by constantly reducing slotting milling depth, can substantially reduce workpiece bottom Defective material residual.In addition, blade introversion is conducive to cut down the radial cutting force of slotting Milling Machining, reduce cutting vibration.Blade introversion And radial misalignments so that inside and outside point of a knife realizes a point bits on the premise of same axial level is kept, and it is wide to be conducive to increase cutting Degree, reduces cutting force, cutting heat, so as to improve processing efficiency, extends cutter life.
Embodiment 1, as shown in Figure 1, in Fig. 1, Kr is cutter tool cutting edge angle, and Kr ' is cutter auxiliary angle.
A kind of slotting milling cutter of cutting edge introversion, including：Multigroup rule of close tooth installation on cutter hub I1 and cutter hub I1 front ends cutterhead The blade assembly then arranged；The blade assembly is installed on the cutterhead of cutter hub I1 front ends by blade fastening accessory I2.
Blade assembly described in every group has a blade, 3 cutting edge introversion of blade installation so that cutter tool cutting edge angle is obtuse angle； Blade 3 uses triangle or parallelogram indexable insert tip, throw away tip, using the acute angle of blade 3 as point of a knife, cutter tool cutting edge angle Kr >= 93 °, auxiliary angle Kr ' >=2 °.
Embodiment 2, as shown in Fig. 2, in Fig. 2, Kr1For outer blades tool cutting edge angle, Kr1' it is outer blades auxiliary angle, Kr2For Inboard blade tool cutting edge angle.
A kind of slotting milling cutter of cutting edge introversion, including：Close tooth installation is multigroup on cutter hub II4 and cutter hub II4 front ends cutterhead Regularly arranged blade assembly；The blade assembly is installed on the cutterhead of cutter hub II4 front ends by blade fastening accessory II5.
Blade assembly described in every group has two blades, is respectively inboard blade 7 and outer blades 6, inboard blade 7 and outer Side blade 6 is arranged in the radial misalignments of cutterhead, and cutting edge all introversions of interior outer blades are installed.
Outer blades 6 use triangle or parallelogram indexable insert tip, throw away tip, with triangle or the acute angle of parallelogram As point of a knife, the tool cutting edge angle Kr of outer blades 61>=93 °, auxiliary angle Kr1′≥2°。
The radius of gyration of 7 any cusp of inboard blade is less than tool radius, inboard blade tool cutting edge angle Kr2≥93°。
The slotting milling cutter of cutting edge introversion described in the present embodiment inserts milling cutter for a kind of cutting edge introversion dislocation type.
Embodiment 3, cutting test
The cutting edge of usually plug in milling cutter is all flare design, in process, when tool contact workpiece bottom, if inserting Milling is deep-controlled improper, and top knife phenomenon often occurs, and shows as the unexpected increase of cutting force and cutting vibration.Actual production In, generally avoid inserting milling top knife by constantly reducing dinting depth, as shown in Figure 3.Although can by reducing slotting milling depth Control top knife, but substantial amounts of material to be processed will be remained in workpiece bottom, it is necessary to arrange other processes to cut off, so as to constrain slotting The high efficiency advantage of Milling Machining.
This test objective is analyzed when slotting milling dinting depth is identical, and cutting edge introversion plugs in milling cutter A and plugs in milling cutter with cutting edge flare B, in the cutting force variation of tool contact workpiece bottom moment.
In this cutting test, two cutters, cutter A and cutter B are taken, cutter A is its of embodiment 1 or embodiment 2 Middle one kind, cutter B are common plug in milling cutter, as shown in Figure 4 and Figure 5.A diameter of 17mm of cutter A, 3 cutters tooth, using CCMT Diamond shaped insert, 97 degree of tool cutting edge angle, 3 degree of auxiliary angle.The a diameter of 32mm of cutter B, using SEET blades, 87 degree of tool cutting edge angle, auxiliary angle 3 Degree.The connection shank diameter 32mm of connection the shank diameter 16mm, cantilevered length 80mm, cutter B of cutter A, cantilevered length in experiment 100mm。
Workpiece material is P20 steel in this experiment, and radial cutting width is equal to cutter diameter, and it is constant to insert milling dinting depth.Knife Have speed of mainshaft 1000r/min, the feed engagement 0.1mm of A, slotting milling step pitch 2mm, radial cutting width 17mm, dinting depth 20mm.The speed of mainshaft 1000r/min of cutter B, feed engagement 0.1mm, insert milling step pitch 3mm, radial cutting width 32mm, under Cutting depth 20mm.
Test piece after experimental rig and slotting milling, respectively as shown in Figures 6 and 7.During experiment, by dynamometer and shake Dynamic sensor acquires cutting force and cutting vibration signal, and test result difference is as illustrated in figs. 8-11.
Result of the test is as follows：
Cutter B inserts milling, and when being cut to workpiece bottom, cutting force increases suddenly, as shown in Fig. 8 Cutting Force Signal figures, cuts Cutting power moment increases to original 2 times or so.At the same time with violent vibration, such as cutting shown in vibration signal figure for Figure 10, vibration Amplitude increases to 4 times of normal process or so suddenly.The unexpected increase of cutting force and cutting vibration, and there occurs slotting milling top knife to show As not only significantly reducing cutter life, causing noise pollution, and serious security risk will be brought to process.
Cutter A inserts milling, and when being cut to workpiece bottom, cutting force change is steady, does not observe cutting force and cutting vibration Jumping phenomenon, as shown in figs. 9 and 11, cutting force and cutting vibration change are steady.
Result of the test shows, plugs in milling cutter processing using cutting edge introversion, can realize that identical dinting depth inserts milling, can be effective Overcome the shortcomings of that cutting edge flare plugs in milling cutter, remove the material to be processed of workpiece bottom as far as possible, improve processing efficiency.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (5)

  1. A kind of 1. slotting milling cutter of cutting edge introversion, it is characterised in that including：Close tooth installation is more on cutter hub and cutter hub front end cutterhead Group blade assembly；
    Blade assembly described in every group has one or two blade；
    When blade assembly described in every group has a blade, blade cutting edge introversion installation so that cutter tool cutting edge angle is obtuse angle；
    When blade assembly described in every group has two blades, which arranges in cutterhead radial misalignments, and inside and outside knife The all introversions of piece cutting edge are installed so that cutter tool cutting edge angle is obtuse angle.
  2. 2. the slotting milling cutter of cutting edge introversion according to claim 1, it is characterised in that：
    When blade assembly described in every group has a blade, using triangle or the tapered point of parallelogram indexable insert tip, throw away tip Point is used as point of a knife, and it is Kr to make cutter tool cutting edge angle, and cutter auxiliary angle is Kr ', then Kr >=93 ° and Kr ' >=2 °.
  3. 3. the slotting milling cutter of cutting edge introversion according to claim 1, it is characterised in that：
    When blade assembly described in every group has two blades, which arranges in cutterhead radial misalignments, and outer blades are adopted By the use of the acute angle cusp of triangle or parallelogram indexable insert tip, throw away tip as point of a knife, make outer blades install after tool cutting edge angle be Kr1, auxiliary angle Kr1', then Kr1>=93 ° and Kr1′≥2°。
  4. 4. the slotting milling cutter of cutting edge introversion according to claim 3, it is characterised in that：
    Inboard blade is less than knife using any cusp of indexable insert tip, throw away tip as point of a knife, the radius of gyration of any cusp of inboard blade Has radius, it is Kr to make the tool cutting edge angle after inboard blade installation2, then Kr2≥93°。
  5. 5. the slotting milling cutter of the cutting edge introversion according to claim 1,2 or 3, it is characterised in that：
    The blade assembly is installed on the cutterhead of cutter hub front end by blade fastening accessory.
CN201711213780.8A 2017-11-28 2017-11-28 A kind of slotting milling cutter of cutting edge introversion Pending CN107900429A (en)

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CN201711213780.8A CN107900429A (en) 2017-11-28 2017-11-28 A kind of slotting milling cutter of cutting edge introversion

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111645126A (en) * 2020-05-14 2020-09-11 天津新伟祥工业有限公司 Automatic scrape asbestos piece tool bit

Citations (5)

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Publication number Priority date Publication date Assignee Title
CN2049976U (en) * 1989-03-14 1989-12-27 国营风华机器厂 Side set toe index right-angled plane hobbing
CN1638901A (en) * 2002-03-06 2005-07-13 伊斯卡有限公司 Metal cutting tool
CN106583822A (en) * 2017-02-10 2017-04-26 大连理工大学 Staggered chip separation and plunge-milling tool suitable for materials difficult to machine
CN206567589U (en) * 2017-02-10 2017-10-20 大连理工大学 A kind of dislocation suitable for difficult-to-machine material point bits insert milling cutter
CN207756980U (en) * 2017-11-28 2018-08-24 大连理工大学 A kind of slotting milling cutter of cutting edge introversion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2049976U (en) * 1989-03-14 1989-12-27 国营风华机器厂 Side set toe index right-angled plane hobbing
CN1638901A (en) * 2002-03-06 2005-07-13 伊斯卡有限公司 Metal cutting tool
CN106583822A (en) * 2017-02-10 2017-04-26 大连理工大学 Staggered chip separation and plunge-milling tool suitable for materials difficult to machine
CN206567589U (en) * 2017-02-10 2017-10-20 大连理工大学 A kind of dislocation suitable for difficult-to-machine material point bits insert milling cutter
CN207756980U (en) * 2017-11-28 2018-08-24 大连理工大学 A kind of slotting milling cutter of cutting edge introversion

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111645126A (en) * 2020-05-14 2020-09-11 天津新伟祥工业有限公司 Automatic scrape asbestos piece tool bit

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