CN108673242A - A kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge - Google Patents
A kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge Download PDFInfo
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- CN108673242A CN108673242A CN201810576907.0A CN201810576907A CN108673242A CN 108673242 A CN108673242 A CN 108673242A CN 201810576907 A CN201810576907 A CN 201810576907A CN 108673242 A CN108673242 A CN 108673242A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
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Abstract
The invention belongs to the cutting technology fields in being machined, and are related to a kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge.The experimental method under the premise of guarantee multiple-cutting-edge micro- tooth milling cutter cutting edge length, changes chip dividing groove helical angle size and cross sectional shape carries out cutting ability contrast experiment first.The milling force curve of the micro- tooth milling cutter side milling workpiece of main contrast's multiple-cutting-edge, the burr and surface roughness of upper and lower surface.This experimental method determines specific chip dividing groove item number and spiral angle according to one-to-one relationship between chip dividing groove helical angle size and chip dividing groove item number, it realizes under conditions of no micro- tooth milling cutter of change multiple-cutting-edge other geometric parameters, only changes the single geometric parameter of chip dividing groove to test its influence to the micro- tooth milling cutter cutting ability of multiple-cutting-edge.The experimental method improves the cutting ability of the micro- tooth milling cutter of multiple-cutting-edge by optimizing the geometry of the micro- tooth milling cutter of multiple-cutting-edge so that experimental result is more accurate, more convincing.
Description
Technical field
The invention belongs to the cutting technology fields in being machined, and are related to a kind of micro- tooth milling cutter chip dividing groove cutting of test multiple-cutting-edge
The experimental method of performance.
Background technology
The specific strength of carbon fiber enhancement resin base composite material is high, specific modulus is high and the performance of material can be parameterized
Design, is very typical light-weight high-strength material, in necks such as aerospace, communications and transportation, sports goods and medical instruments
It is used widely in domain.Although composite material during assembly connection, it is compound can to meet carbon fiber with monolithic molding
The requirements such as dimensional accuracy, form accuracy and the surface quality of material parts also need the mechanical processing techniques such as milling to carry out follow-up
Processing.Milling Process is to remove excess stock to obtain the common processing method of workpieces processing that dimensional accuracy is high, surface quality is good,
And machining locus can flexibly meet the process requirements of various complex parts.
The cutter structure of milling cutter is to determine the vital factor of processing quality.In the Milling Process of carbon fibre composite
In, to ensure processing quality and the micro- tooth milling cutter of processing efficiency generally use multiple-cutting-edge.The characteristics of multiple-cutting-edge micro- tooth milling cutter is cutting edge item
Number is more, and the length of single cutting edge is short.The micro- tooth milling cutter of multiple-cutting-edge is the chip dividing groove that several reverse acting spirals are added in helical edges,
Chip dividing groove is discrete for micro- sword by the continuous cutting edge of milling cutter.Chip dividing groove, which can also generate, resists the power that cutting edge generates axial force,
So as to reduce axial cutting force, reduce the lamination defect of workpiece, and the presence of chip dividing groove improves milling cutter heat dissipation and row
Bits ability.It can be seen that chip dividing groove plays critical effect to the cutting ability of the micro- tooth milling cutter of multiple-cutting-edge.
Related invention and research in terms of milling cutter construction design and cutting ability mainly have：Chinese invention patent
CN102049559A discloses a kind of suitable quick preferred method of numerical control milling cutter for processing aluminium alloy or titanium alloy material.From
The cutting ability of milling cutter, is finally pressed from the aspect of tool wear, cutting force, cutting material surface roughness and the cost of charp tool four
Cutter cost performance selects milling cutter.The structure for being wherein not directed to influence and milling cutter of the milling cutter geometrical structure parameter to cutting ability is excellent
Change.Chinese invention patent CN106270700A discloses a kind of micro- tooth milling of multiple-cutting-edge for carbon fibre composite high speed milling
Knife improves the intensity of single micro- tooth, improves into bits continuity, with realizing under big cutting data high-speed smooth Milling Process,
High-quality, highly-efficient processing demand that different fiber ranks, different-thickness, a variety of ply sequence carbon fibers answer material product can be met.
Present invention research chip dividing groove spiral angle and cross sectional shape are to the affecting laws of cutting ability, by milling cutter geometry
The improvement of structure improves the processing quality of milling carbon fibre composite, so as to improve the bearing capacity of parts and tired
The labor service life.
Invention content
Processing carbon fibre composite is cut in view of the above-mentioned problems, the present invention is research multiple-cutting-edge micro- tooth milling cutter chip dividing groove
A kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge is invented in the influence of power, burr and surface roughness.This
Invention is to change chip dividing groove helical angle size respectively in the case where ensureing that the geometric parameters such as cutting edge length and helical angle are constant
Study on Cutting Performance is carried out with cross sectional shape.The chip dividing groove of the micro- tooth milling cutter of multiple-cutting-edge and its helical angle size have one-to-one close
System, the present invention have selected four spiral angles and corresponding chip dividing groove item number by calculating；Design is close with comparative study
Square and arc-shaped two kinds of chip dividing groove cross sectional shapes.Then the milling composite material Multidirectional Slabs Used under identical machined parameters, profit
The size and wavy curve of cutting force are measured with dynamometer；The burr of workpieces processing upper and lower surface is observed using super depth-of-field microscope
Situation；The roughness of finished surface is measured using roughmeter.
Technical scheme of the present invention：
A kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge, this method 1) ensureing cutting edge length
It is constant with the geometric parameters such as helical angle, it is designed according to the correspondence of chip dividing groove item number and spiral angle and processes different chip dividing grooves
The micro- tooth milling cutter of multiple-cutting-edge of spiral angle；2) cross sectional shape for changing chip dividing groove designs and processes the micro- tooth milling cutter of multiple-cutting-edge；3) work is processed
Ensure that milling cutter rotating speed, radial cutting-in are identical with feed engagement when part, measure the cutting force in cutting process in real time with dynamometer,
The geometries such as the micro- tooth milling cutter chip dividing groove angle of multiple-cutting-edge and cross sectional shape are compared to cutting force size and cutting force curve waveform
It influences；4) with the burr of super depth-of-field microscope observation workpiece upper and lower surface, compare what the micro- tooth milling cutter construction of multiple-cutting-edge inhibited burr
It influences；5) roughness of finished surface is measured with roughmeter, the comparison micro- tooth milling cutter construction of multiple-cutting-edge is to machined surface roughness
It influences.It is as follows：
The first step designs the micro- tooth milling cutter of multiple-cutting-edge 8 of different spiral angles and cross sectional shape chip dividing groove
The micro- tooth milling cutter of multiple-cutting-edge has the cutting edge 1 of 14 dextrorotation, left-handed chip dividing groove 2 that cutting edge 1 is discrete for the cutting of micro- tooth
Sword；Under the premise of 2 cross sectional shape of chip dividing groove is constant, the item number and spiral angle of chip dividing groove 2 can change the length of cutting edge 1
Degree；CD is the sum of the groove width of the length and chip dividing groove 2 of cutting edge 1 after the micro- tooth milling cutter of multiple-cutting-edge is discrete, and AD, CE are respectively represented to cutting
Sword 1 carries out discrete chip dividing groove 2, and the helical angle of chip dividing groove 2 is α, and the spiral angle of cutting edge 1 is β, if CD=l, chip dividing groove 2
Item number be n, milling cutter diameter d；
BC=CDsin β=lsin β (2)
AB=AC-BC (3)
BD=CDcos β (4)
When milling cutter diameter d, cutting edge length l, cutting edge helixangleβ determine, chip dividing groove item number n and pitch angle alpha are one by one
It is corresponding；When changing cutting edge helixangleβ size, with same method in the case where ensureing that cutting edge length l is constant, changes and divide
Consider slot pitch angle alpha size to be worth doing；
The cross sectional shape of the micro- tooth milling cutter chip dividing groove of multiple-cutting-edge 2 is designed to nearly square and two kinds arc-shaped, l1、h1It is respectively with θ
Groove width, groove depth and the angle of nearly square chip dividing groove, l2And h2The groove width and groove depth of respectively arc-shaped chip dividing groove；2 spiral shell of chip dividing groove
Swing angle degree is identical, to ensure to only have the cross sectional shape of chip dividing groove 2 different；In the suitable range of 2 width of chip dividing groove and depth, into
Row is dimensionally-optimised；
Second step, control cutting parameter is constant, carries out the contrast experiment of the different micro- tooth milling cutters of multiple-cutting-edge
Three-dimensional dynamometer 5 is fixed on by press plate mechanism on milling machine table 6, three-dimensional dynamometer 5 for acquiring in real time
Cutting force；Clamp bottom board 4 is bolted on three-dimensional dynamometer 5, and workpiece 7 is bolted on folder by fixture cover board 3
Have on bottom plate 4；Milling cutter 8 is mounted on milling machine spindle 9, carries out milling experiment；
Third walks, and size and waveform analysis are carried out to the cutting force curve that three-dimensional dynamometer 5 measures；With super depth-of-field microscope
The burr of upper surface 10 and lower surface 11 to workpiece 7 is observed；With roughmeter to the surface of the finished surface 12 of workpiece 7
Roughness measures；The cutting ability of the micro- tooth milling cutter of multiple-cutting-edge is judged finally by comparison Milling Force, burr and surface roughness.
Beneficial effects of the present invention：The present invention is according to one-to-one between chip dividing groove helical angle size and chip dividing groove item number
Relationship determines specific chip dividing groove item number and spiral angle, realizes in no condition for changing the other geometric parameters of milling cutter
Under, only change the single geometric parameter of chip dividing groove to study its influence to the micro- tooth milling cutter cutting ability of multiple-cutting-edge.The present invention passes through
The geometry of optimization milling cutter improves the cutting ability of milling cutter so that experimental result is more accurate, more convincing.
Description of the drawings
Fig. 1 (a) is the micro- tooth milling cutter schematic diagram of multiple-cutting-edge；
Fig. 1 (b) is the micro- tooth milling cutter partial enlarged view of multiple-cutting-edge
Fig. 2 (a) is the structural schematic diagram of the nearly square chip dividing groove cross sectional shape of the micro- tooth milling cutter construction of multiple-cutting-edge；
Fig. 2 (b) is the structural schematic diagram of the arc-shaped chip dividing groove cross sectional shape of the micro- tooth milling cutter construction of multiple-cutting-edge；
Fig. 3 is milling Experimental equipment；
Fig. 4 is the schematic diagram of workpiece and the micro- tooth milling cutter position relationship of multiple-cutting-edge.
In figure：1 cutting edge；2 chip dividing grooves；3 fixture cover boards；4 clamp bottom boards；5 three-dimensional dynamometers；6 milling machine tables；7 works
Part；The micro- tooth milling cutter of 8 multiple-cutting-edges；9 milling machine spindles；10 workpiece surfaces；11 workpiece lower surfaces；12 finished surfaces.
Specific implementation mode
With reference to technical solution and the attached drawing specific implementation mode that the present invention will be described in detail.
It is a kind of test the micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge experimental method be as follows：
The first step designs the micro- tooth milling cutter of multiple-cutting-edge 8 of different chip dividing groove spiral angles and cross sectional shape.
Ensure that the other geometric parameters of milling cutter are constant, design the micro- tooth milling cutter of multiple-cutting-edge with different chip dividing groove spiral angles first
8.The cutting edge item number of milling cutter is 14, cutting edge spiral angle β=25 °, milling cutter diameter d=10mm；Line segment AD, CE are represented
The spiral angle of chip dividing groove 2, chip dividing groove is α；If CD=l, chip dividing groove item number is n.
When n is equal to 9,
β=3.2 BC=CDsin β=lsin × sin25 ° of mm=1.3524mm (8)
AB=AC-BC=3.49-1.3524=2.1383mm (9)
β=3.2 BD=CDcos × cos25 °=2.900mm (10)
Using above-mentioned formula can calculate the chip dividing groove spiral angle when n is equal to 10,11,12 be respectively 31.7 °,
27.4°、23.6°.After changing the size of cutting edge helixangleβ, it can ensure that cutting edge length is constant with same method
In the case of, change the size of chip dividing groove helical angle.
Chip dividing groove item number n and the correspondence of pitch angle alpha are shown in Table 1.
1 chip dividing groove item number of table and helical angle correspondence
Chip dividing groove cross sectional shape is designed as nearly square and two kinds arc-shaped, as shown in Figure 2.Fig. 2 (a) is nearly square point
Consider slot cross-section shape to be worth doing, the value range of angle, θ is 80 °~90 °；Fig. 2 (b) is arc-shaped chip dividing groove cross sectional shape.When two it is micro-
When tooth Multi-cutting-edge milling tool only has this unitary variant of chip dividing groove cross sectional shape, it is ensured that two chip dividing groove cross sectional shape width l1=l2, depth
h1=h2.In the suitable range of chip dividing groove width and depth, they are carried out dimensionally-optimised.
Second step is ensureing that cutting parameter is all identical, is carrying out pair of the micro- tooth milling cutter of different geometric parameter multiple-cutting-edge
Than experiment.
The milling parameter of contrast experiment is selected as speed of mainshaft 3820r/min, feed engagement 0.05mm/tooth, radial cut
Deep 1mm.Experimental provision is as shown in figure 3, three-dimensional dynamometer 5 is fixed on by press plate mechanism on milling machine table 6, three-dimensional dynamometry
Instrument 5 for acquiring cutting force in real time.Clamp bottom board 4 is bolted on three-dimensional dynamometer 5, and workpiece 7 is led to by fixture cover board 3
Bolt is crossed to be fixed on clamp bottom board 4.8 clamping of milling cutter carries out milling experiment on milling machine spindle 9.
Third walks, and size and waveform analysis are carried out to the milling force curve that three-dimensional dynamometer 5 measures；With super depth-of-field microscope
The burr of upper surface 10 and lower surface 11 to workpiece 7 is observed；With roughmeter to the surface of the finished surface 12 of workpiece 7
Roughness measures.Judge the micro- tooth milling cutter of the multiple-cutting-edge of what structure finally by comparison Milling Force, burr and surface roughness
Excellent cutting performance.
Claims (1)
1. a kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge, which is characterized in that steps are as follows：
The first step designs the micro- tooth milling cutter (8) of multiple-cutting-edge of different spiral angles and cross sectional shape chip dividing groove
The micro- tooth milling cutter (8) of multiple-cutting-edge has the cutting edge (1) of 14 dextrorotation, left-handed chip dividing groove (2) that cutting edge (1) is discrete for micro- tooth
Cutting edge；Under the premise of chip dividing groove (2) cross sectional shape is constant, the item number and spiral angle of chip dividing groove (2) change cutting edge (1)
Length；CD be the micro- tooth milling cutter of multiple-cutting-edge (8 it is discrete after cutting edges (1) length and chip dividing groove (2) along cutting edge direction length it
With AD, CE are respectively represented carries out discrete chip dividing groove (2) to cutting edge (1), and the helical angle of chip dividing groove (2) is α, cutting edge (1)
Spiral angle be β；If CD=l, the item number of chip dividing groove (2) is n, milling cutter diameter d；
BC=CDsin β=lsin β (2)
AB=AC-BC (3)
BD=CDcos β (4)
When milling cutter diameter d, cutting edge length l, cutting edge helixangleβ determine, chip dividing groove item number n and pitch angle alpha correspond；
When changing cutting edge helixangleβ size, with same method in the case where ensureing that cutting edge length l is constant, change chip dividing groove
Pitch angle alpha size；
The cross sectional shape of the chip dividing groove (2) of the micro- tooth milling cutter of multiple-cutting-edge is designed to nearly square and two kinds arc-shaped, l1、h1It is respectively with θ
Groove width, groove depth and the angle of nearly square chip dividing groove, l2And h2The groove width and groove depth of respectively arc-shaped chip dividing groove；Chip dividing groove (2)
Spiral angle is identical, and to ensure to only have chip dividing groove, (2 cross sectional shape is different；In chip dividing groove (2) width and the suitable range of depth
It is interior, it carries out dimensionally-optimised；
Second step, control cutting parameter is constant, carries out the contrast experiment of the different micro- tooth milling cutters (8) of multiple-cutting-edge
Three-dimensional dynamometer (5) is fixed on by press plate mechanism on milling machine table (6), three-dimensional dynamometer (5) for adopting in real time
Collect cutting force；Clamp bottom board (4) is bolted on three-dimensional dynamometer (5), and workpiece (7) passes through spiral shell by fixture cover board (3)
Bolt is fixed on clamp bottom board (4) side；Milling cutter (8) is mounted on milling machine spindle (9), carries out milling experiment；
Third walks, and size and waveform analysis are carried out to the cutting force curve that three-dimensional dynamometer (5) measures；With super depth-of-field microscope pair
The upper surface (10) of workpiece (7) and the burr of lower surface (11) are observed；With roughmeter to the finished surface of workpiece (7)
(12) surface roughness measures；Judge the micro- tooth milling cutter of multiple-cutting-edge finally by comparison Milling Force, burr and surface roughness
Cutting ability.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014180A (en) * | 2019-05-09 | 2019-07-16 | 哈尔滨理工大学 | Fluted drill |
| CN110587836A (en) * | 2019-09-19 | 2019-12-20 | 安徽理工大学 | Micro-milling processing method for sapphire surface |
| CN110877120A (en) * | 2019-12-24 | 2020-03-13 | 常州利德切削技术有限公司 | High-efficient branch bits milling cutter that can be used to deep hole reaming processing |
| CN113182567A (en) * | 2021-03-31 | 2021-07-30 | 成都飞机工业（集团）有限责任公司 | Method for rapid trial cutting and cutting parameter optimization of numerical control milling cutter |
| CN116663193A (en) * | 2023-06-12 | 2023-08-29 | 哈尔滨理工大学 | Discrete edge end mill design method based on free cutting principle |
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| CN110877120A (en) * | 2019-12-24 | 2020-03-13 | 常州利德切削技术有限公司 | High-efficient branch bits milling cutter that can be used to deep hole reaming processing |
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| CN116663193A (en) * | 2023-06-12 | 2023-08-29 | 哈尔滨理工大学 | Discrete edge end mill design method based on free cutting principle |
| CN116663193B (en) * | 2023-06-12 | 2023-11-28 | 哈尔滨理工大学 | Discrete edge end mill design method based on free cutting principle |
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