CN106647632A - CFRP and titanium alloy laminated structure reamer service life prediction method - Google Patents
CFRP and titanium alloy laminated structure reamer service life prediction method Download PDFInfo
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- CN106647632A CN106647632A CN201611223309.2A CN201611223309A CN106647632A CN 106647632 A CN106647632 A CN 106647632A CN 201611223309 A CN201611223309 A CN 201611223309A CN 106647632 A CN106647632 A CN 106647632A
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- reamer
- fraising
- aperture size
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/408—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
- G05B19/4086—Coordinate conversions; Other special calculations
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35356—Data handling
Abstract
The invention provides a CFRP and titanium alloy laminated structure reamer service life prediction method, and relates to the technical field of carbon fiber composite material and titanium alloy lamination assembly. The method comprises the steps: building a CFRP and titanium alloy laminated structure reaming aperture size error analysis model and a reamer rear flank surface abrasion (AB value) analysis model; evaluating the service life of a reamer through various types of indexes, and giving comprehensive consideration to the two constraints: the aperture size precision of a laminated structure in a reaming process and the flank abrasion of the reamer; and predicting and analyzing the effective service life of the reamer according to the current structure parameters and perforation technological parameters of the reamer. The method provided by the invention is high in accuracy of a prediction result of the service life of the reamer, can effectively predict the maximum reaming number of the laminated structure, reduces the unqualified ratio and rejection rate because of the exceeding of the service life of the reamer, and enables the reamer to give full play to the maximum reaming capability.
Description
Technical field
The present invention relates to carbon fibre composite matches somebody with somebody technical field, more particularly to a kind of CFRP and titanium with titanium alloy stack
The Forecasting Methodology in alloy stack structure reaming knife life-span.
Background technology
Carbon fibre composite (CFRP) has the series of advantages such as density is low, intensity is high, specific strength is big, absorbing is good,
It is widely used in fields such as Aero-Space, automobile, guided missiles.For example, the passenger plane fuselage surface 90% of Boeing 787 is all employed
Carbon fibre composite, the new aviation aircraft of China also gradually increases the ratio that carbon fibre composite is used, aviation flight
The application percentage of device composite and titanium alloy has become weighs one of its advanced important indicator.
As advanced aviation aircraft widely uses carbon fibre composite, carbon fibre composite and titanium alloy stack
The drilling demand of distribution structure is increasing, and the assembling of the passenger plane of Boeing 787 needs to process 4,000,000 carbon fibre composites and titanium alloy
Laminated construction hole.Due to the difficult processing characteristics and its mutually restriction, impact of carbon fibre composite and titanium alloy, drilling process is deposited
Drilling cutter life is low, drilling quality be difficult to ensure, the unmanageable outstanding problem of part rejection rate.It is reported that, it is domestic
In outer aircraft assembling process, the carbon fibre composite scrapped is caused because of the multiple material layering/tearing defect that generation is processed in drilling
Number of parts accounts for more than the 60% of whole faulty parts.
Carbon fibre composite and titanium alloy laminated construction fraising complicated condition, reamer structural parameters and fraising technological parameter
Larger is affected on reamer cutter life, reaming knife service life is difficult to Accurate Prediction.Due to lacking effective laminated construction hinge
Spot facing cutter life-span prediction method, operating personnel are difficult to judge when reamer reaches the service life limit under the conditions of current fraising.
In order to avoid because of caused low qualification rate and high part rejection rate more than cutter Acceptable life, can only rule of thumb reduce
Drilling quantity, therefore the Acceptable life of reaming knife is greatly reduced, artificially improve drilling cost.
For carbon fibre composite and the Forecasting Methodology in titanium alloy laminated construction reaming knife life-span, carry out both at home and abroad
Substantial amounts of research work, it is proposed that towards the working life of reamer Forecasting Methodology of the evaluation indexes such as fraising quality, wear of the tool flank.These
Forecasting Methodology has the following disadvantages：(1) existing Forecasting Methodology is only applicable to carbon fibre composite and individually reams condition, does not carry
Go out effective working life of reamer Forecasting Methodology under the conditions of carbon fibre composite reams with titanium alloy laminated construction, due to not accounting for
Titanium alloy material weares and teares to reaming knife in laminated construction reaming procedure impact and composite are to titanium alloy ream chip removal
Obstruction affect, thus these Forecasting Methodologies are not suitable for laminated construction；(2) existing Forecasting Methodology is commented based on single cutter life
Valency index carries out the prediction of service life, and predicting the outcome is unable to concentrated expression and reaches reaming procedure aperture chi after the service life limit
Very little error and cutter wear of the tool flank situation.
The content of the invention
For the defect of prior art, a kind of CFRP of present invention offer is pre- with the titanium alloy laminated construction reaming knife life-span
Survey method, considers the two kinds of constraints of aperture size precision and reaming knife wear of the tool flank, can effectively predict CFRP and titanium
The maximum drilling quantity of alloy stack structure fraising, reduces because beyond cutter life and caused part disqualification rate and scrapping
Rate, and make drilling cutter give play to the fraising ability of maximum.
A kind of CFRP and the Forecasting Methodology in titanium alloy laminated construction reaming knife life-span, comprise the following steps that：
Step 1, setting laminated construction fraising aperture size accuracy standard；
Step 2, setting laminated construction fraising reamer blunt standard are not more than 0.06mm for reamer wear of the tool flank value VB；
Step 3, arrange and be input into initial fraising quantity；
Step 4, mapping relations mould of the stage aperture size error that steadily reamed according to laminated construction with drilling number change
Type, calculates the aperture size error under current reamer geometrical parameters, fraising technological parameter and fraising quantity term；It is described
Aperture size error is shown with the mapping relations model such as formula (1) of drilling number change；
D=1.214N+0.15216+Df (1)
Wherein, D is aperture size error, and N is fraising quantity, DfFor aperture size error correction values, DfCalculating such as formula
(2) shown in；
Wherein, krFor reamer tool cutting edge angle, αrFor reamer outer rim relief angle, Vc is fraising cutting speed, fr for fraising often rotate into
Amount；
If step 5, step 4 calculate the aperture size error for obtaining and are less than the aperture size precision that step 1 is arranged, after
Continuous execution step 6, otherwise execution step 9；
Step 6, steady starting stage reamer wear of the tool flank value reflecting with drilling number change of being reamed according to laminated construction
Relational model is penetrated, knife after the reamer under current reamer geometrical parameters, fraising technological parameter and fraising quantity term is calculated
Surface wear value VB；The reamer wear of the tool flank value is shown with the mapping relations model such as formula (3) of drilling number change；
VB=0.001333N-0.01333+VBf (3)
Wherein, VB be reamer wear of the tool flank value, VBfFor wear of the tool flank correction value, VBfCalculating such as formula (4) shown in；
If step 7, step 6 calculate the VB values for obtaining less than the blunt standard VB value that step 2 is arranged, step is continued executing with
Rapid 8, otherwise execution step 9；
Step 8, fraising quantity increase by 1, return to step 4；
Step 9, forecast analysis process terminate, and the setting laminated construction reaming knife life-span is current drilling quantity, and output is cut with scissors
Spot facing cutter life-span, aperture size error and reamer wear of the tool flank value VB.
As shown from the above technical solution, the beneficial effects of the present invention is：The CFRP that the present invention is provided and titanium alloy lamination
The Forecasting Methodology in structure reaming knife life-span, establishes CFRP with titanium alloy laminated construction fraising aperture size error analysis mould
Type, reamer wear of the tool flank (VB values) analysis model, using many indexes reamer cutter life is evaluated, and has considered lamination knot
Two kinds of constraints of aperture dimensional accuracy and reaming knife wear of the tool flank in structure reaming procedure, according to current reamer structural parameters and system
Hole technological parameter, the Acceptable life of forecast analysis reamer, reamer life forecast result accuracy is high, can be effectively pre-
The maximum drilling quantity of laminated construction fraising is surveyed, is reduced because exceeding cutter life and caused part disqualification rate and scrappage,
And make drilling cutter give play to the fraising ability of maximum.
Description of the drawings
Fig. 1 is the Forecasting Methodology flow process of CFRP provided in an embodiment of the present invention and titanium alloy laminated construction reaming knife life-span
Figure；
Fig. 2 is cutter life forecast analysis process aperture size error provided in an embodiment of the present invention and wear of the tool flank value
VB with drilling number change schematic diagram.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described in further detail.Hereinafter implement
Example is not limited to the scope of the present invention for illustrating the present invention.
By taking T300 carbon fibre composites and TC6 titanium alloy laminated construction reaming procedures as an example, the laminated construction fraising bar
Part and required precision are as follows：
(1) reamer geometrical parameters：A diameter of 6.6mm, tool cutting edge angle is 45 degree, and outer rim relief angle is 12 degree；
(2) cutter material is K6UF (hard alloy)；
(3) ream technological parameter：Cutting speed is 20m/min, and the amount of feeding is 0.03mm/r；
(4) ream dimension precision requirement：Aperture size meets H9 precision；
(5) T300 composites plate thickness is 5mm, and TC6 titanium alloy sheets thickness is 3mm.
As shown in figure 1, the method for the present embodiment is as described below.
Step 1, setting laminated construction fraising aperture size accuracy standard.
Needed to meet H9 required precisions according to the dimensional accuracy that reams in the present embodiment, the aperture size of a diameter of 6.6mm is public
Difference is 0.036mm, i.e. Dmax=0.036mm.
Step 2, setting laminated construction fraising reamer blunt standard.
Consider fraising quality and reamer mill, breakage, the blunt standard for arranging laminated construction fraising reamer is hinge
Knife wear of the tool flank value VB is not more than 0.06mm, i.e. VBmax=0.06mm.
Step 3, to arrange and be input into initial fraising quantity be 5.
Step 4, mapping relations mould of the stage aperture size error that steadily reamed according to laminated construction with drilling number change
Type, calculates the aperture size error under current reamer geometrical parameters, fraising technological parameter and fraising quantity term；It is described
Aperture size error is shown with the mapping relations model such as formula (1) of drilling number change；
D=1.214N+0.15216+Df (1)
Wherein, D is aperture size error, and N is fraising quantity, DfFor aperture size error correction values, DfCalculating such as formula
(2) shown in；
Wherein, krFor reamer tool cutting edge angle, αrFor reamer outer rim relief angle, Vc is fraising cutting speed, fr for fraising often rotate into
Amount.
In the present embodiment, according to above-mentioned aperture size error with working as that the mapping relations model of drilling number change is calculated
Front aperture scale error is 0.0041mm.
If step 5, step 4 calculate the aperture size error for obtaining and are less than the aperture size precision that step 1 is arranged, after
Continuous execution step 6, otherwise execution step 9.
In the present embodiment, current aperture scale error 0.0041mm is less than dimensional accuracy tolerance 0.036mm, then execution step
6。
Step 6, steady starting stage reamer wear of the tool flank value reflecting with drilling number change of being reamed according to laminated construction
Relational model is penetrated, knife after the reamer under current reamer geometrical parameters, fraising technological parameter and fraising quantity term is calculated
Surface wear value VB；The reamer wear of the tool flank value is shown with the mapping relations model such as formula (3) of drilling number change；
VB=0.001333N-0.01333+VBf (3)
Wherein, VB be reamer wear of the tool flank value, VBfFor wear of the tool flank correction value, VBfCalculating such as formula (4) shown in.
In the present embodiment, calculated with the mapping relations model of drilling number change according to above-mentioned reamer wear of the tool flank value
Current reamer wear of the tool flank VB values be 0.02mm.
If step 7, step 6 calculate the VB values for obtaining less than the blunt standard VB value that step 2 is arranged, step is continued executing with
Rapid 8, otherwise execution step 9.
In the present embodiment, current reamer wear of the tool flank VB values 0.02mm calculated in step 6 are less than blunt standard VBmax
=0.06mm, then execution step 8.
Step 8, fraising quantity increase by 1, and return to step 4 repeats step 4 to step 8, until aperture size precision
It is unsatisfactory for or when blunt standard is unsatisfactory for, execution step 9.
Step 9, forecast analysis process terminate, and the setting laminated construction reaming knife life-span is current drilling quantity, and output is cut with scissors
Spot facing cutter life-span, aperture size error and reamer wear of the tool flank value VB.
In implementation procedure, aperture size error and wear of the tool flank value VB are with the change of drilling quantity as shown in Fig. 2 by scheming
2 understand, when ream is to 42 holes, although knife face abrasion still meets relevant criterion, but aperture size error is 0.0361mm, greatly
In aperture size tolerance 0.036mm for arranging, so effective cutter life predictive analysis results of reamer are 41 drilling quantity.
The present embodiment establishes knife face mill after T300 and TC6 laminated construction fraising aperture size error separation, reamer
(VB values) analysis model is damaged, a kind of knife for considering the two kinds of constraints of aperture size precision and reaming knife wear of the tool flank is proposed
Tool life-span prediction method, according to current reamer structural parameters and drill process parameter, the Acceptable life of forecast analysis reamer.
Using the method, the maximum drilling quantity that laminated construction reams can be effectively predicted, be reduced because caused beyond cutter life
Part disqualification rate and scrappage, and make drilling cutter give play to the fraising ability of maximum.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in previous embodiment, either which part or all technical characteristic are equal to
Replace；And these modifications or replacement, the model for being limited the essence disengaging the claims in the present invention of appropriate technical solution
Enclose.
Claims (1)
1. the Forecasting Methodology in a kind of CFRP and titanium alloy laminated construction reaming knife life-span, it is characterised in that：The method it is concrete
Step is as follows：
Step 1, setting laminated construction fraising aperture size accuracy standard；
Step 2, setting laminated construction fraising reamer blunt standard are not more than 0.06mm for reamer wear of the tool flank value VB；
Step 3, arrange and be input into initial fraising quantity；
Step 4, mapping relations model of the stage aperture size error that steadily reamed according to laminated construction with drilling number change, meter
Calculate the aperture size error under current reamer geometrical parameters, fraising technological parameter and fraising quantity term；The aperture
Scale error is shown with the mapping relations model such as formula (1) of drilling number change；
D=1.214N+0.15216+Df (1)
Wherein, D is aperture size error, and N is fraising quantity, DfFor aperture size error correction values, DfCalculating such as formula (2) institute
Show；
Wherein, krFor reamer tool cutting edge angle, αrFor reamer outer rim relief angle, Vc is fraising cutting speed, and fr is fraising feed of every rotation；
If step 5, step 4 calculate the aperture size error for obtaining less than the aperture size precision that step 1 is arranged, continue to hold
Row step 6, otherwise execution step 9；
Step 6, the steady starting stage reamer wear of the tool flank value that reamed according to laminated construction are closed with the mapping of drilling number change
It is model, calculates knife face mill after the reamer under current reamer geometrical parameters, fraising technological parameter and fraising quantity term
Damage value VB；The reamer wear of the tool flank value is shown with the mapping relations model such as formula (3) of drilling number change；
VB=0.001333N-0.01333+VBf (3)
Wherein, VB be reamer wear of the tool flank value, VBfFor wear of the tool flank correction value, VBfCalculating such as formula (4) shown in；
If step 7, step 6 calculate the VB values for obtaining less than the blunt standard VB value that step 2 is arranged, step 8 is continued executing with,
Otherwise execution step 9；
Step 8, fraising quantity increase by 1, return to step 4；
Step 9, forecast analysis process terminate, and the setting laminated construction reaming knife life-span is current drilling quantity, export fraising knife
Tool life-span, aperture size error and reamer wear of the tool flank value VB.
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| CN107598675A (en) * | 2017-06-21 | 2018-01-19 | 沈阳航空航天大学 | A kind of drilling parameter optimization method based on hard alloy cutter tipping failure prediction |
| CN108362599A (en) * | 2018-01-17 | 2018-08-03 | 沈阳航空航天大学 | A kind of appraisal procedure of cutter maximum reconditioning number |
| CN109648397A (en) * | 2018-12-07 | 2019-04-19 | 杭州电子科技大学 | Broaching tool life-span prediction method based on cutter tooth margin width and broaching load dependency |
| 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 |
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| CN106647632B (en) | 2018-10-19 |
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