CN106002485A - Measurement method for tool wear rate and establishment method for tool wear prediction model - Google Patents

Measurement method for tool wear rate and establishment method for tool wear prediction model Download PDF

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CN106002485A
CN106002485A CN201610498590.4A CN201610498590A CN106002485A CN 106002485 A CN106002485 A CN 106002485A CN 201610498590 A CN201610498590 A CN 201610498590A CN 106002485 A CN106002485 A CN 106002485A
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diffusion
pressure
temperature
function
exemplar
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CN106002485B (en
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孙剑飞
杨森
陈五
陈五一
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Beihang University
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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
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool

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Abstract

The invention discloses a measurement method for a tool wear rate and an establishment method for a tool wear prediction model. According to the measurement method and the establishment method, tool nose cutting is abstracted into a diffusion couple sample piece for high-temperature and high-pressure experiments, meanwhile, the variables of temperature and pressure are introduced, and compared with other existing methods, the measurement method and the establishment method are closer to the actual situation of cutting. The quantitative analysis test is conducted on the result, a comprehensive wear prediction model is established on the basis of the test result, the coupling effect of diffusion and bonding wear and abrasive wear is considered, and wide application prospects and far-reaching guidance significance are achieved in the technical field of metal cutting machining.

Description

The assay method of tool wear rate and the method for building up of tool wear forecast model
Technical field
The present invention relates to tool wear field, the assay method and the tool wear that are more particularly to a kind of tool wear rate are pre- Survey the method for building up of model.
Background technology
High-speed cutting is one of approach realizing highly-efficient processing, and high cutting temperature and violent tool wear are to limit The principal element of Tool in Cutting speed.By studying the wear process of high speed cutting tool, dissect the abrasion mechanism of cutter, and build Vertical more accurate cutter quantitative model, the beneficially reasonable selection of cutting parameter, it is achieved highly-efficient processing.Process in high-speed cutting In, Cutting Tool Failure Mechanism is mainly bonding abrasion, diffusive wear and abrasive wear, and different abrasion mechanisms exist jointly, mutual shadow Ring.
Diffusive wear is primarily upon to the diffusion of workpiece/cutter element, judges diffusion mill according to test result The generation damaged and severe degree.Researcher has recognized the change of diffusion couple material matrix performance, but lacks suitably evaluation and refer to Mark, the quantitative study of less report diffusion couple material matrix physical property impact.Diffusive wear model is mostly according to Fick second Diffusion law, calculates and spreads the material transition or loss caused, and the wear rate that the change not accounting for diffusion couple material causes Change.
Summary of the invention
(1) to solve the technical problem that
The technical problem to be solved in the present invention is that stationary knife has wear rate and prediction wear extent the most really.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides the assay method of a kind of tool wear rate, described method bag Include following steps:
S1, the physical field of emulation working angles, obtain distribution and the correspondence in the temperature field of tool nose in working angles The distribution of pressure field；
S2, preparing diffusion couple exemplar, wherein said diffusion couple exemplar includes cutter module and workpiece module, described cutter Module and described tool model superposition are arranged；
S3, described diffusion couple exemplar is positioned in vacuum environment, and applies the described temperature obtained in described step S1 Each temperature in Chang and the pressure of correspondence, be incubated corresponding to taking out after the scheduled time of the temperature and pressure applied described Diffusion couple exemplar；Wherein said pressure is a force value in described pressure field；
S4, by described diffusion couple exemplar cut, by facet determine corresponding to different temperatures, pressure diffusion concentration with And diffusion depth, determine that described diffusion couple exemplar is with temperature, the spread function of pressure and diffusion coefficient；
S5, described diffusion couple exemplar is separated, along diffusion interface separately, use microgranule whitewashing erosion testing machine test Obtain wear rate under the conditions of different temperatures, pressure, temperature retention time, along the wear rate situation of change in diffusion layer depth direction, to determine Cutter material wear rate and the relation function of concentration of element.
Preferably, described step S1 utilizes the physical field of cutting simulation software emulation process.
Preferably, the upper surface of the described diffusion couple exemplar in described step S2 and the depth of parallelism of lower surface are less than predetermined Parallel angle value, the roughness of the diffusingsurface of described diffusion couple exemplar is less than predetermined roughness value, and the length of described cutter module is little In the length of described workpiece module, the width of described cutter module is less than the width of described workpiece module, described cutter module Thickness is more than the thickness of described workpiece module.
Preferably, described step S3 specifically includes following steps:
S31, described diffusion couple exemplar is put in diffusion welding (DW) testing machine, the upper and lower surface of described diffusion couple exemplar All it is lined with potsherd；
S32, by vacuum state in described diffusion welding (DW) testing machine, after-applied predetermined temperature；Wherein, described pre-constant temperature Degree is a temperature value in described temperature field；
S33, utilize upper and lower surface from pressure head to described diffusion couple exemplar apply predetermined pressure；Wherein said predetermined pressure is The pressure corresponding with the described predetermined temperature in described step S32；
S34, the heat-insulation pressure keeping scheduled time；
S35, cancel pressure, reduce temperature, take out described diffusion couple exemplar afterwards.Preferably, described step S4 uses Described facet is entered line scan by energy depressive spectroscopy, determines described diffusion concentration and the diffusion depth of each element.
Preferably, described step S5 utilize microgranule whitewashing erosion testing machine described diffusion layer is carried out wear rate test, Carry out microgranule erosion test vertical with described diffusion interface, obtain wear rate function.
The method for building up of a kind of tool wear forecast model, described method includes said method, and described method is also wrapped Include following steps:
Temperature and the pressure of correspondence that S6, the diffusion concentration obtained according to described step S4, diffusion depth are corresponding determine Coefficient in spread function, spread function formula is:
C ( x , t ) = C 0 2 π D t ∫ 0 ∞ e - ( ξ + x ) 2 4 D t d ξ = C 0 ( 1 - e r f x π D t ) , ( x > 0 ) - - - ( 5 )
In formula, C0For initial concentration, D diffusion coefficient, t is diffusion time, and erf is error function, and x is that depth direction is sat Mark, ξ is integration variable；
D ( N , T ) = D 0 ( N ) e - Q k T - - - ( 6 )
In formula, D0(N) being frequency factor function, N is normal pressure, and Q is diffusion activation energy, and T is diffusion temperature, and k is gas Body constant；
S7, described diffusion layer is carried out wear rate test, obtain the wear rate function w in cutter material diffusion depth directiont The wear rate w of (x) and workpiece materialm；
S8, analyze the phase of wear rate and the spread function of different elements according to described wear rate function and described spread function Guan Xing, chooses and mainly affects element, determines diffusion concentration corresponding for diffusion layer influence depth X and original concentration ratio Cd, obtain not The depth function X that extends influence with elementi(N, T t) or mainly affect the average diffusion influence depth function of element
S9, according to a certain main depth function X that extends influence affecting elementi(N, T t) or mainly affect the flat of element All extend influence depth functionDetermine that wear model is:
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X i ) , w m , N ) - - - ( 7 )
Or
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X ‾ ) , w m , N ) - - - ( 8 )
In formula, w is wear extent, A1(γ, β) is tool geometrical parameter function, and γ is anterior angle, and β is cutting edge inclination；wt(Xi) it is The wear rate function of cutter, for mainly affecting degree of depth X of Elements Diffusioni(N, T, t) or Average Element diffusion depth Function.
Preferably, described step S7 use microgranule whitewashing erosion testing machine described diffusion layer is carried out wear rate test, Microgranule erosion test is carried out with described diffusion interface vertical.
(3) beneficial effect
The invention provides assay method and the method for building up of tool wear forecast model of a kind of tool wear rate, this Bright by point of a knife cutting is abstracted into diffusion couple exemplar carries out high temperature and pressure experiment, it is simultaneously introduced temperature and pressure variable, relatively Other method existing is closer to the practical situation of cutting.Result is carried out test of quantitative analysis, based on combining that test result is set up Occlusal wear forecast model, it is contemplated that diffusion and bonding abrasion, the coupling of abrasive wear, in metal cutting process technical field Have broad application prospects and far-reaching directive significance.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the assay method of the tool wear rate of the present invention；
Fig. 2 coordinate system schematic diagram；
Fig. 3 is the schematic diagram of diffusion couple exemplar in the present invention.
Detailed description of the invention
With embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.Following example are used for this is described Bright, but can not be used for limiting the scope of the present invention.
A kind of assay method of tool wear rate, as it is shown in figure 1, said method comprising the steps of:
S1, the physical field of emulation working angles, obtain distribution and the correspondence in the temperature field of tool nose in working angles The distribution of pressure field；According to practical situation in this step, corresponding material parameter, tool sharpening angle parameter and cutting are set Parameters etc., for corresponding cutter/workpiece material combination, use cutting simulation software to carry out working angles physical field emulation, imitative Really obtain physical field (temperature field, the pressure field) distribution situation of the lower point of a knife of different cutting, determine according to the analysis result of physical field The distribution of the temperature and pressure parameter of High Temperature High Pressure diffusion experiment, i.e. temperature field and the distribution of the pressure field of correspondence；
S2, preparing diffusion couple exemplar, wherein said diffusion couple exemplar includes cutter module and workpiece module, described cutter Module and described tool model superposition are arranged；
S3, described diffusion couple exemplar is positioned in vacuum environment, and applies the described temperature obtained in described step S1 Each temperature in Chang and the pressure of correspondence, be incubated corresponding to taking out after the scheduled time of the temperature and pressure applied described Diffusion couple exemplar；Wherein said pressure is a force value in described pressure field；
S4, by described diffusion couple exemplar cut, by facet determine corresponding to different temperatures, pressure diffusion concentration with And diffusion depth, the diffusive wear degree of cutter is determined according to described diffusion concentration and diffusion depth；In this step preferably Diffusion couple is pressed the cutting of certain specification size, carries out sample preparation according to test request, use energy depressive spectroscopy (EDS) test diffusion couple The spread condition of cross sectional elements, enters line scan along the parting face being perpendicular to diffusingsurface.Coordinate system is set as shown shown in Fig. 2, Diffusion interface is x=0, and hard alloy side is x forward.Test obtains (material, temperature, pressure, guarantor under each element different condition Temperature time etc.) diffusion concentration, diffusion depth situation and Changing Pattern.
The present invention by point of a knife cutting is abstracted into diffusion couple exemplar carries out high temperature and pressure experiment, be simultaneously introduced temperature and Pressure variations, relatively has other method practical situation closer to cutting.
Further, cutter material and workpiece material are used machining or line to be cut into necessarily by described step S2 Size, the sample block of shape, and carry out polishing, polish and cleaning so that the upper surface of described diffusion couple exemplar and lower surface The depth of parallelism is less than predetermined parallel angle value, and the diffusingsurface of described diffusion couple exemplar reaches mirror effect, and roughness is coarse less than predetermined Angle value, the length of described cutter module is less than described workpiece less than the length of described workpiece module, the width of described cutter module The width of module, the thickness of described cutter module is more than the thickness of described workpiece module.The principle schematic of diffusion couple such as Fig. 3 institute Showing, 1 is workpiece module, and 2 is cutter module, and A, B are partial enlarged drawing.From Tu Zhongguan it can be seen that spread condition.
Further, described step S3 specifically includes following steps:
S31, described diffusion couple exemplar is put in diffusion welding (DW) testing machine, the upper and lower surface of described diffusion couple exemplar All it is lined with potsherd；
S32, by vacuum state in described diffusion welding (DW) testing machine, after-applied predetermined temperature；Wherein, described pre-constant temperature Degree is a temperature value in described temperature field；
S33, utilize upper and lower surface from pressure head to described diffusion couple exemplar apply predetermined pressure；Wherein said predetermined pressure is The pressure corresponding with the described predetermined temperature in described step S32；
S34, after the heat-insulation pressure keeping scheduled time, take out described diffusion couple exemplar, specifically, first unloading pressure after being incubated, Lower the temperature backward, finally take out test specimen.According to working angles physical field simulation result, temperature and pressure takes difference in distribution Level, temperature retention time takes different levels by index.
Further, described method is further comprising the steps of:
S5, microgranule whitewashing erosion testing machine is utilized described diffusion layer to be carried out wear rate test, vertical with described diffusion Interface carries out microgranule erosion test, obtains the wear rate function w in cutter material diffusion depth directiontThe mill of (x) and workpiece material Loss rate wm；
The invention also discloses the method for building up of a kind of tool wear forecast model, the method includes above-mentioned tool wear rate Assay method, and also comprise the following steps:
Temperature and the pressure of correspondence that S6, the diffusion concentration obtained according to described step S4, diffusion depth are corresponding determine Coefficient in spread function, spread function formula is:
C ( x , t ) = C 0 2 π D t ∫ 0 ∞ e - ( ξ + x ) 2 4 D t d ξ = C 0 ( 1 - e r f x π D t ) , ( x > 0 ) - - - ( 9 )
In formula, C0For initial concentration, D diffusion coefficient, t is diffusion time, and erf is error function, and x is that depth direction is sat Mark, ξ is integration variable；
D ( N , T ) = D 0 ( N ) e - Q k T - - - ( 10 )
In formula, D0(N) being frequency factor function, N is normal pressure, and Q is diffusion activation energy, and T is diffusion temperature, and k is gas Body constant；
S7, described diffusion layer is carried out wear rate test, obtain the wear rate function w in cutter material diffusion depth directiont The wear rate w of (x) and workpiece materialm；
S8, analyze the phase of wear rate and the spread function of different elements according to described wear rate function and described spread function Guan Xing, chooses and mainly affects element, determines diffusion concentration corresponding for diffusion layer influence depth X and original concentration ratio Cd, obtain not The depth function X that extends influence with elementi(N, T t) or mainly affect the average diffusion influence depth function of element
S9, the depth function X that extends influence according to described a certain essential elementi(N, T t) or mainly affect the flat of element All extend influence depth functionDetermine that wear model is:
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X i ) , w m , N ) - - - ( 11 )
Or
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X ‾ ) , w m , N ) - - - ( 12 )
In formula, w is wear extent, A1(γ, β) is tool geometrical parameter function, and γ is anterior angle, and β is cutting edge inclination；wt(Xi) it is The wear rate function of cutter, for mainly affecting degree of depth X of Elements Diffusioni(N, T, t) or Average Element diffusion depth Function.
Last century, method for establishing model carried out test of quantitative analysis to result, and the resultant wear set up based on test result is surveyed Cover half type, it is contemplated that diffusion and bonding abrasion, the coupling of abrasive wear, has wide in metal cutting process technical field Application prospect and far-reaching directive significance.
Below by a specific embodiment, said method is described in detail.
The present embodiment is as a example by KYOCERA KW10 carbide tool high-speed turning TC4 titanium alloy, and the method concrete steps are such as Under:
Step one: working angles physical field emulates.Combine (such as KYOCERA's KW10 hard for corresponding cutter/workpiece material Alloy blade and TC4 titanium alloy), use cutting simulation software The ThirdWave AdvantEdge to carry out two-dimensional cutting and imitate Very.According to practical situation, corresponding material parameter, tool sharpening angle parameter and cutting parameter etc. are set.In this example, blade is adopted With KYOCERA's SNGA120408-KW10 indexable turning blade, knife bar is Zhuzhou diamond CSRNR2525M12 knife bar.According to cutter, work Part material arranges corresponding material；Arranging machining anterior angle is 6 °, and processing relief angle is-6 °；Cutting parameter is according to actual cut It is 100～160m/min that situation arranges cutting speed scope, and the range of feeds is 0.05～0.2mm/r, and cutting depth is 1.5mm.Physical field (temperature field, the pressure field) distribution situation of point of a knife under different cutting parameter is obtained, according to thing in post processing The analysis result of reason field determines the temperature and pressure parameter of High Temperature High Pressure diffusion experiment.In this example, obtain rake face cutting region temperature Degree Gradient distribution scope is 550～850 DEG C, and Pressure distribution range is 200～800MPa.
Step 2: prepared by diffusion couple exemplar.
Using machining or line to be cut into bulk cutter material and workpiece material, size, shape are according to actual feelings Condition is chosen, it is desirable to the exemplar upper and lower surface depth of parallelism is less than 0.05mm, and titanium alloy block length, width are greater than hard alloy blocks, thick Degree is then less than hard alloy blocks.Carrying out polishing, polish and cleaning by sample block diffusion experiment plane, reach mirror effect, plane is thick Rugosity is less than 0.05 μm.
Step 3: High Temperature High Pressure diffusion experiment.
The burnishing surface of cutter/workpiece material sample block is fitted, becomes very much diffusion couple exemplar.Diffusion couple is put into diffusion welding (DW) examination Test in machine, the most all cushion with potsherd.After installation, first it is evacuated to 1 × below 10-2Mpa, then by heating furnace liter Temperature is to predetermined temperature, and the rear pressure head that heated up is downwardly applied to predetermined clamping pressure, and held for some time.First unload after being incubated Carry pressure, lower the temperature backward, finally take out test specimen.According to working angles physical field simulation result, temperature and pressure is in distribution Inside taking 4 levels, temperature retention time is then at e1～e5Five levels are taken in the range of min.
Step 4: Elements Diffusion situation is tested
Diffusion couple is pressed the cutting of certain specification size, carries out sample preparation according to test request.Energy depressive spectroscopy (EDS) is used to survey The spread condition of examination diffusion couple cross sectional elements, enters line scan along the parting face being perpendicular to diffusingsurface.If diffusion interface is x=0, Hard alloy side is x forward, obtains the diffusion of (material, temperature, pressure, temperature retention time etc.) under each element different condition dense Degree, diffusion depth situation and Changing Pattern.Spread function C by experiment value measured value matching elementi(x t), obtains each element Diffusion coefficient DiAnd diffusion depth X (T)i(N,T,t).Spread function and diffusion coefficient formula are respectively as follows:
C ( x , t ) = C 0 2 π D t ∫ 0 ∞ e - ( ξ + x ) 2 4 D t d ξ = C 0 ( 1 - e r f x π D t ) , ( x > 0 ) - - - ( 13 )
In formula: C0For initial concentration, D diffusion coefficient, t is diffusion time, and erf is error function, and x is that depth direction is sat Mark, ξ is integration variable；.
D ( N , T ) = D 0 ( N ) e - Q k T - - - ( 14 )
In formula: D0(N) being frequency factor function, N is normal pressure, and Q is diffusion activation energy, and T is diffusion temperature, and k is gas Body constant.
Step 5: material diffusion layer wear rate is tested.
Wearability test.Carry out sample preparation according to test request, use microgranule whitewashing erosion testing machine (MSE testing machine) to expansion Dissipate even diffusion layer region and carry out wear rate test, be perpendicular to spread interface and carry out microgranule erosion test, obtain (material under different condition Material, temperature, pressure, temperature retention time etc.) the wear rate situation of change of diffusion layer and affecting laws.Respectively obtain cutter, workpiece material The wear rate function w that material is correspondingt(x) and wm。
Specifically comprising the following steps that of the method for building up of the tool wear forecast model of the present embodiment
Analyze the C of wear rate and different elementsi(x, dependency t) select main affecting factors.In this example, select complete The average diffusion influence depth function of portion's elementAs reference function.Thus, the wear model formula obtained is:
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X ‾ ) , w m , N ) - - - ( 15 )
In formula: w is wear extent, C1(alpha, gamma) is tool geometrical parameter function, and γ is anterior angle, and β is cutting edge inclination；A2For demarcating Coefficient；For the wear rate function of cutter material, for the element average diffusion degree of depthFunction.
Diffusion couple is carried out the heating of certain time, insulation under vacuum, condition of high voltage by the present embodiment, simulates tool-chip Zone state.Diffusion couple is carried out energy spectrum analysis test, obtains (material, temperature, pressure, temperature retention time) element under different condition Spread condition and diffusion coefficient；Diffusion couple is carried out microhardness, wear rate and shear strength test of quantitative analysis, obtains difference The situation that affects of diffusion couple matrix physical property and rule under condition (material, temperature, pressure, temperature retention time).A kind of high speed is cut Cutting knife tool wear model, the result that it obtains according to test, using diffusion depth as the variable of wear rate function, establish consideration Diffusion and bonding abrasion, the resultant wear model of abrasive wear coupling.
Embodiment of above is merely to illustrate the present invention, rather than limitation of the present invention.Although with reference to embodiment to this Bright be described in detail, it will be understood by those within the art that, technical scheme is carried out various combination, Amendment or equivalent, without departure from the spirit and scope of technical solution of the present invention, all should contain the right in the present invention and want Ask in the middle of scope.

Claims (8)

1. the assay method of a tool wear rate, it is characterised in that said method comprising the steps of:
S1, the physical field of emulation working angles, obtain the distribution in the temperature field of tool nose in working angles and the pressure of correspondence The distribution in the field of force；
S2, preparing diffusion couple exemplar, wherein said diffusion couple exemplar includes cutter module and workpiece module, described cutter module Arrange with described tool model superposition；
S3, described diffusion couple exemplar is positioned in vacuum environment, and applies in the described temperature field that obtains in described step S1 Each temperature and the pressure of correspondence, insulation corresponding to taking out described diffusion after the scheduled time of the temperature and pressure applied Even exemplar；Wherein said pressure is a force value in described pressure field；
S4, by described diffusion couple exemplar cut, determined corresponding to different temperatures, the diffusion concentration of pressure and expansion by facet Dissipate the degree of depth, determine that described diffusion couple exemplar is with temperature, the spread function of pressure and diffusion coefficient；
S5, described diffusion couple exemplar is separated, along diffusion interface separately, use microgranule whitewashing erosion testing machine test to obtain Under the conditions of different temperatures, pressure, temperature retention time, wear rate is along the wear rate situation of change in diffusion layer depth direction, determines cutter Material wear rate and the relation function of concentration of element.
Method the most according to claim 1, it is characterised in that utilize cutting simulation software emulation process in described step S1 Physical field.
Method the most according to claim 1, it is characterised in that the upper surface of the described diffusion couple exemplar in described step S2 And the depth of parallelism of lower surface is less than predetermined parallel angle value, the roughness of the diffusingsurface of described diffusion couple exemplar is coarse less than predetermined Angle value, the length of described cutter module is less than described workpiece less than the length of described workpiece module, the width of described cutter module The width of module, the thickness of described cutter module is more than the thickness of described workpiece module.
Method the most according to claim 1, it is characterised in that described step S3 specifically includes following steps:
S31, putting in diffusion welding (DW) testing machine by described diffusion couple exemplar, the upper and lower surface of described diffusion couple exemplar all pads There is potsherd；
S32, by vacuum state in described diffusion welding (DW) testing machine, after-applied predetermined temperature；Wherein, described predetermined temperature is A temperature value in described temperature field；
S33, utilize upper and lower surface from pressure head to described diffusion couple exemplar apply predetermined pressure；Wherein said predetermined pressure for institute State the pressure that the described predetermined temperature in step S32 is corresponding；
S34, the heat-insulation pressure keeping scheduled time；
S35, cancel pressure, reduce temperature, take out described diffusion couple exemplar afterwards.
Method the most according to claim 1, it is characterised in that use energy depressive spectroscopy to described cutting in described step S4 Line scan is entered in face, determines described diffusion concentration and the diffusion depth of each element.
Method the most according to claim 1, it is characterised in that utilize microgranule whitewashing erosion testing machine pair in described step S5 Described diffusion layer carries out wear rate test, carries out microgranule erosion test vertical with described diffusingsurface, obtains wear rate function.
7. the method for building up of a tool wear forecast model, it is characterised in that described method includes that claim 1 to 5 is arbitrary Method described in Xiang, and described method is further comprising the steps of:
Temperature and the pressure of correspondence that S6, the diffusion concentration obtained according to described step S4, diffusion depth are corresponding determine diffusion Coefficient in function, spread function formula is:
C ( x , t ) = C 0 2 π D t ∫ 0 ∞ e - ( ξ + x ) 2 4 D t d ξ = C 0 ( 1 - e r f x π D t ) , ( x > 0 ) - - - ( 1 )
In formula, C0For initial concentration, D diffusion coefficient, t is diffusion time, and erf is error function, and x is depth direction coordinate, and ξ is Integration variable；
D ( N , T ) = D 0 ( N ) e - Q k T - - - ( 2 )
In formula, D0(N) being frequency factor function, N is normal pressure, and Q is diffusion activation energy, and T is diffusion temperature, and k is that gas is normal Number；
S7, described diffusion layer is carried out wear rate test, obtain the wear rate function w in cutter module diffusion depth directiont(x) and The wear rate w of workpiece modulem；
S8, analyze being correlated with of the wear rate spread function with different elements according to described wear rate function and described spread function Property, choosing mainly affects element, determines diffusion concentration corresponding for diffusion layer influence depth X and original concentration ratio Cd, obtain difference The depth function X that extends influence of elementi(N, T t) or mainly affect the average diffusion influence depth function of element
S9, according to the depth function X that extends influence mainly affecting element described ini(N, T t) or mainly affect the average expansion of element Dissipate influence depth functionDetermine that wear model is:
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X i ) , w m , N ) - - - ( 3 )
Or
d w d t = A 1 ( γ , β ) · A 2 · f ( w t ( X ‾ ) , w m , N ) - - - ( 4 )
In formula, w is wear extent, A1(γ, β) is tool geometrical parameter function, and γ is anterior angle, and β is cutting edge inclination；wt(Xi) it is cutter Wear rate function, for mainly affecting degree of depth X of Elements Diffusioni(N, T, t) or Average Element diffusion depthLetter Number.
Method the most according to claim 7, it is characterised in that use microgranule whitewashing erosion testing machine pair in described step S7 Described diffusion layer carries out wear rate test, carries out microgranule erosion test vertical with described diffusion layer.
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CN109570562A (en) * 2018-12-25 2019-04-05 北京理工大学 A kind of ultra-high strength and toughness steel deep hole boring dedicated tool compound formulation
CN110057707A (en) * 2019-05-31 2019-07-26 上海交通大学 Carbon fibre reinforced composite/titanium alloy lamination drilling cutters biometrics method
CN110057707B (en) * 2019-05-31 2021-06-25 上海交通大学 Method for measuring service life of carbon fiber reinforced composite/titanium alloy laminated drilling tool
CN110293451A (en) * 2019-07-03 2019-10-01 哈尔滨理工大学 A kind of monoblock type flat-bottom end mill wear of the tool flank rate determines method
CN111366123A (en) * 2020-03-06 2020-07-03 大连理工大学 Part surface roughness and cutter wear prediction method based on multi-task learning
CN113458871A (en) * 2021-06-17 2021-10-01 武汉理工大学 Wear prediction method and device for ceramic cutter and storage medium

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