CN100445083C - Tyre production method for promoting tyre consistency - Google Patents

Abstract

A tire manufacturing method includes a method for optimizing the uniformity of a tire by reducing the after cure radial force variation. The after cure radial force variation vector is modeled as a vector sum of each of the vectors representing contributions arising from the tire building steps-the 'tire room effect vector' and a vector representing contributions arising from the vulcanization and uniformity measurement steps-the 'curing room effect vector'. In further detail, both the tire room and curing room effect vectors can be further decomposed into sub-vectors representing each radial force variation contribution for which a measurable indicator is available. For a series of tires, the method obtains such measurements as the before cure radial runout (RRO) at one or more stages of the building sequence, measurements of loading angles on the tire building equipment, and measurements made during vulcanization process.

Description

Be used to improve the conforming tire manufacturing method of tire

Background of invention

[0001] the present invention relates to the manufacture method of tire, relate in particular to by reducing the conforming method that the after cure radial force variation improves tire.In tire, more precisely, in radial, after cure radial force variation (RFV) may be subjected to the influence of many variablees, and described variable is at the assembling process of giving birth to (sulfuration) tire and produce during tyre vulcanization.When the radial force variation in the vulcanized tyre surpassed acceptable limit, the possibility of result was the vibrations that are harmful to, the travelling and operating of this vibration influence vehicle.For these reasons, tiremaker makes great efforts to make the radial force variation in the tire of paying its client to minimize.

[0002] method of improving the known and common implementation of after cure RFV is in the tread surface of grinding tire corresponding to the zone of excessive radial power.This method is effectively, but existing defective has been to produce the appearance do not expected and has removed wear-resisting tread-rubber from product.In addition, this method needs extra manufacturing step and uses expensive equipment.As another selection, after cure RFV can be by United States Patent (USP) 5,365, and the method for describing in 781 is improved, and wherein tire curing sidewall corresponding to measured uniformity physical deformation takes place in a controlled manner.This method eliminated tread-rubber do not expect remove, but still need extra manufacturing step and expensive equipment.

[0003] alternative of the after cure of RFV correction is the RFV root in sulfuration pre-treatment tire.For example, in tire industry, be well known that the starting point of the various tire products that during assembling process, stagger, observe influence afterwards after cure RFV.According to making the minimized configuration of after cure RFV best, these data are used to the optimal placement of each tire building step appointed product starting point then.Other method is at United States Patent (USP) 5,882, and is open in 452, wherein before sulfuration radial deflection (RRO) measured, process afterwards is to clamp not vulcanized tyre and make it be shaped as round shape.

[0004] another trial that is used to improve conforming manufacture method comprises a kind of like this method, and wherein relevant with tire building and the tyre vulcanization factor of facilitating after cure RRO or RFV produces deviation with respect to sulfuration RRO before tested.The example of typical method provides in Japanese patent application JP-1-145135.The sample sets of tire in these methods is generally four, is placed in the sulfurizing mould of appointment the angle increment that each tire rotation equates.The reference position of described angle increment on tire, for example the product seam is measured with respect to the fixed position on the sulfurizing mould.Then, tire cures and their compound RFV waveform is recorded.Term " composite wave-shape " expression is from the original waveform of measurement mechanism record.Pass through the stack each other of the waveform that write down then and average described waveform.Stack is the Grade Point Average of the waveform that write down, and it is realized by the overlapping composite wave-shape of measuring from each tire.The influence hypothesis of sulfuration is left in the basket, and only stays " shaping " factor relevant with the moulding of tire.In a similar fashion, another group of sample tire cures in sulfurizing mould and obtains their RFV waveforms separately.Waveform separately is average by the stack quilt once more, the angle increment separately of each tire of starting point deviation of current waveform.By this way, the influence of tire building supposition is left in the basket, and only stays " sulfuration factor ".At last, the average waveform corresponding to shaping factor and sulfuration factor is applied.Deviation relative to each other takes place to attempt that the corresponding maximum of a waveform is aimed at the minimum of a value of another waveform in overlaid waveforms.The angular displacement of Que Dinging is transferred to sulfurizing mould then thus.When vulcanized tyre did not arrive mould, each tire was placed in the mould with predetermined drift angle.By this way, be shaped and sulfuration the influence of after cure RFV is referred to as is minimized.The major defect of this method is that it is identical for each tire that its hypothesis is shaped with the influence of vulcanizing after cure RFV.Particularly, the factor that the shaping factor is exerted an influence may marked change during manufacturing is carried out.In fact, these methods have comprised conflicting hypothesis.Be used for determining that the method for sulfuration factor relies on such hypothesis, promptly the tire step of rotating in sulfurizing mould has been offset tire building (or shaping) influence.The influence of only current sulfuration RRO between tire consistent and when not influencing at random this hypothesis just set up.If this hypothesis is right, be used for so subsequently determining that the method for shaping factor will produce unworthy result.

[0005] in Japanese patent application JP-6-182903 and United States Patent (USP) 6,514,441, further improvement has been proposed.In these lists of references, be similar to above-mentioned method and be used for determining to be shaped and sulfuration factor waveform.Yet these methods have added the general influence of preceding sulfuration RRO to after cure RFV in these factors.Described two kinds of methods are handled the preceding sulfuration RRO of measurement slightly differently.Disclosed method is optimized the RRO effect among the list of references JP-6-198203, and disclosed method estimates that by constant hardness scale(degree) factor being applied to waveform the RFV influence is to estimate effective RFV among the US 6,514,441.These two kinds of methods continue to rely on the overlapping of previous described each waveform or superpose to attempt to optimize after cure RFV.

[0006] the most important defective of all said methods is that they depend on the stack of each waveform or overlapping.Be well known that in tire industry vehicle is more obvious to being reflected in the low order harmonics of the inconsistency of RFV, for example one to five order harmonics.Because above method is used the composite wave-shape that comprises all harmonic waves, these methods fail to optimize the most responsive RFV harmonic wave of vehicle.In addition, attempt to use composite wave-shape to optimize conforming method and can be described as the such after cure RFV of generation in some instances, in fact described after cure RFV has increased the influence of important low order harmonics.In this case, tire can cause more vehicle vibration problems than not optimizing described process.So, can optimize particular harmonic and need not and aforementionedly be used for determining that the manufacture method of the hypothesis of tire and tyre vulcanization influence can produce the tire that uniformity improves all the time.

Summary of the invention

[0007] in view of above background, the invention provides a kind of tire manufacturing method, this method can reduce the after cure radial force variation (RFV) of each tire of producing effectively.Method of the present invention is used to optimize each harmonic wave of RFV.Compound RFV signal for example described above is the scalar that changes from average radial power in the radial load around each position, angle tire of tire, and described average radial power is corresponding to the vertical load that is applied to tire.When this complex wave was broken down into each harmonic component, each harmonic wave of RFV can be an after cure RFV vector with polar coordinate representation.This vector has the value of the peak-to-peak amplitude that the power that equals each harmonic wave changes, and equals the azimuth of the angular difference between the point of witness mark and maximum RFV.

[0008] by utilizing the vector representation of some factors, wherein said factor is facilitated the tested after cure RFV of the tire that given process produces, and method of the present invention had produced obvious improvement with respect to former method.The vector that after cure RFV vector is modeled as vector-" vulcanizing chamber influences vector " that RFV that each vector-" the wheel proloculum influence vector " that representative is derived from the RFV influence of tire building step and representative be derived from sulfuration and coherence measurement step influences with.More specifically, but wheel proloculum and vulcanizing chamber vector both can further be decomposed into the sub-vector of each RFV influence of the available measurement index of representative.For a series of tires, described method for example obtains the such measured value of preceding sulfuration radial deflection (RRO) in one or more stages of moulding sequence, the measured value at the loading angle on the tire building equipment and the measured value that obtains during sulfidation.After sulfuration, tire is installed on the coherence measurement machine and is obtained tested after cure RFV harmonic component.About this point, the value and the azimuthal coefficient that are used for the sub-vector component all are not known.

[0009] the present invention has improved previously described method further, does not estimate wheel proloculum and vulcanizing chamber influence because it does not rely on the processing of tested compound RFV waveform, and does not also rely on previously described any hypothesis.The present invention uses the input of aforementioned measured data as single analytical procedure.Therefore, the coefficient of all sub-vectors is determined simultaneously.In case know these coefficients, easy calculating wheel proloculum influences vector and vulcanizing chamber influences vector.Thereafter, when making individual tire, sulfuration RRO and other manufacturing data before the one or more steps during the tire manufacturing are measured and write down.These data are imported in the vector model and the wheel proloculum influences vector value and azimuth are calculated.At last, estimated wheel proloculum and vulcanizing chamber influence vector and are used for calculating the not tire curing angular orientation of sulfurizing mould, and it will make the after cure RFV of described individual tire minimize.In a word, the conforming method that is used to improve tire may further comprise the steps:

(a) be identified for estimating one group of vector coefficients of the after cure radial force variation of tire;

(b) the after cure uniformity of estimating individual tire comprises step by step following:

(i) the preceding sulfuration radial deflection characteristic of the described individual tire of measurement;

(ii) select the harmonic wave of radial force variation to be optimized;

(iii) estimate described after cure uniformity from described vector coefficients;

(c) aim at described individual tire at predetermined vulcanizing chamber azimuth, described individual tire is loaded in the described sulfurizing mould, and vulcanizes described tire.

The processing aspect of the method for [0010] just the having described of the present invention factor that further sulfuration RRO is relevant with after cure RFV before it is equivalent to previous method and has produced progress.RRO variation before having found on the vulcanized tyre does not always produce after cure RFV influence, and described after cure RFV influence is the scalar multiple of RRO vector aspect value or azimuth.Therefore, rely on the result that the scalar of simple hardness factor expresses possibility and leads to errors.

[0011] crude tyre RRO can comprise radially RRO because of the crude tyre carcass at least to the influence of after cure RFV, the RRO of tyre surface and band assembly, with the RRO of certain level and the influence that produces, the RRO of described certain level is because fabrication tool influences, rather than caused by any crude tyre RRO influence.In the method for the invention, crude tyre RRO is modeled as the vector product of gain vector GC and crude tyre RRO vector GR1 to the influence of after cure RFV.Gain vector is to vulcanizing RRO carries out correct modeling to the conversion of after cure RFV in the past.At least one pair of vector coefficients is corresponding to gain vector.

[0012] first that can estimate the crude tyre vector by the first harmonic RRO vector GR1C and the carcass gain vector GNC of combination green tire body.The vector product of GNC and GR1C is called as carcass influences vector.This influence may change between different kinds of tyre.

The first harmonic GR1T of RRO vector that [0013] can be by combination green tire face and band assembly and tyre surface and band assembly gain vector GNT come the second portion of modeling crude tyre vector.The vector product of GNT and GR1T is called as tyre surface and band component influences vector.This influence also may change between different kinds of tyre.

[0014] third part of crude tyre vector is owing to not being subjected to GR1C or GR1T control " instrument " influence.These instrument vectors are constant vectors, and their value is considered to not change between different kinds of tyre.The example of instrument influence is the vector component relevant with tire shaping apparatus, for example phase I assembly drum vector, second stage assembly drum vector, tyre surface and band assembly forming drum vector and transfer ring vector.The intercept vector carries out modeling to any other constant influence of not described by the arbitrary vector in front.

[0015] the instrument influence allows the raising of model accuracy.Tested RRO is the RRO sum of the current measurement mechanism mounted thereto of actual crude tyre RRO and tire, and this measurement mechanism is assembly drum or measurement device.In the improvement of this method, determine that the step of one group of vector coefficients further comprises step by step following: at the phase I assembly drum, the loading angle that the record carcass is gone up in any one of second stage assembly drum or transfer ring or its combination.Similarly, the conforming step of the after cure of estimating individual tire further comprises step by step following: the loading angle of the carcass of recording individual tire on identical instrument.

[0016] during the tire building step, can manipulate tools influence further to minimize after cure RFV.This realizes by the value that influences vector according to optimization criterion change wheel proloculum.This method may further comprise the steps:

(a) be identified for estimating one group of vector coefficients of the after cure radial force variation of tire;

(b) the after cure uniformity of estimating individual tire comprises step by step following:

(i) the preceding sulfuration radial deflection characteristic of the described individual tire of measurement;

(ii) select the harmonic wave of radial force variation to be optimized;

(c) optimize the after cure uniformity of described individual tire from described vector coefficients, comprise step by step following:

(i) estimate the loading angle of one or more tyre elements according to optimization criterion;

(ii) described parts are loaded on the corresponding fabrication tool at described loading angle.

[0017] if manufacture process allows tire to be loaded in the mould in the predetermined party parallactic angle, can further improve after cure RFV.In this case, optimization criterion equals the value that vulcanizing chamber influences vector substantially for the value that the wheel proloculum influences vector.Crude tyre is aligned at predetermined vulcanizing chamber azimuth then, is loaded in the sulfurizing mould, and cures.

[0018] do not allow tire under the predetermined party parallactic angle is loaded into situation in the mould in manufacture process, optimization criterion minimizes for the value that makes wheel proloculum vector separately.Among these methods that realize described model arbitrary, during tire building, be the RRO and the finished product crude tyre measure R RO of RRO, tyre surface and the band assembly of finished product green tire body.In each intermediate steps by the RRO that recorded can be with the azimuth that matches with the instrument influence deviation.

[0019] method of the present invention is owing to it determines that simultaneously each sub-vector has attendant advantages.Different with previous method, method of the present invention is also determined sub-vector without any need for the increment of accurate " loaded " position.This measurement data that has obtained during providing and having used production to carry out is upgraded the possibility of sub-vector coefficient continuously.Therefore, described method will be considered a large amount of manufacturing variables that occur during carrying out of producing.

Description of drawings

[0020] will understand the present invention better by the accompanying drawing of following description, described accompanying drawing shows the non-limiting example of the enforcement of the conforming tire manufacturing method that is used to improve tire according to the present invention.

[0021] Fig. 1 is a diagram of preparing the tire production of enforcement method of the present invention.

[0022] Fig. 2 A to Fig. 2 C diagram of coherence measurement value of radial force variation of tire of having drawn, it has shown original composite wave-shape and some harmonic components.

[0023] Fig. 3 is the vector polar diagram of method of the present invention, and it has shown the influence to the after cure radial force variation of tire of wheel proloculum and vulcanizing chamber vector.

[0024] Fig. 4 is the vector polar diagram of method of the present invention, and it has shown the conforming optimization of vulcanized tyre.

[0025] Fig. 5 is the vector polar diagram of method of the present invention, and it has shown that the crude tyre radial deflection influences the influence of vector to the wheel proloculum.

[0026] Fig. 6 is the vector polar diagram of method of the present invention, and it has shown the influence to the crude tyre vector of the measurement drum that is used to measure living radial deflection.

[0027] Fig. 7 is the vector polar diagram of method of the present invention, and it has increased the influence of after cure coherence measurement machine.

[0028] Fig. 8 is the vector polar diagram of extended method of the present invention, and it has shown the influence to the crude tyre vector of optional feature influence, and described influence is because the crude tyre carcass, tyre surface and band assembly, and the phase I drum, the instrument influence of tyre surface and band assembly drum and transfer ring.

[0029] Fig. 9 is the vector polar diagram of extended method of the present invention, and it has shown the conforming optimization of vulcanized tyre.

The specific embodiment

[0030] will specifically describe typical scenario of the present invention now, one or more schemes are shown in the drawings.Each example of describing is provided as explanation of the present invention, and does not mean that it is limitation of the present invention.In describing in the whole text, can use with other scheme as the part demonstration of a scheme or the feature of describing.All or some general features of scheme use the similar reference number that further illustrates in the drawings to be described.Following table 1 has been pointed out buzzword used herein.It should be noted that CBD_REF, FBD_REF, SBD_REF, TSR_REF and CAV_REF are the scalars that is used for the reference angle that is recorded during the tire manufacturing step.

[0031] modern pneumatic tire needs to make very meticulously and accurately usually.The target of tire designer is a finished tire circumferentially and laterally can not have nonuniformity.Yet although being intended that of designer, the many steps in the tire production can cause various nonuniformities.Significantly nonuniformity is that tire may not be perfect circle (radial deflection or RRO).The nonuniformity of another form is radial force variation (RFV).Considering to be installed in tire on the wheel hub that rotates freely is deflected given distance and rolls on flat surfaces.The certain radial load of a kind of function on flat surfaces as tire design can be measured with various any means known.This radial load on average equals to be applied to the load on the tire.Yet when tire rotates, described radial load will change slightly owing to the variation of inside tires geometry, and this causes the local radial firmness change of tire.These variations can be produced on crude tyre by local condition, and described local condition is for example for being used to make the product seam of crude tyre or the inaccuracy placement of some product.Tire curing process can be owing to additive factor is introduced in the slip of product between vulcanizer or curing time.

[0032] Fig. 1 has shown the concise and to the point description of tire production.Carcass 10 forms on assembly drum 15.In the single phase manufacture process, carcass 10 remains on the drum 15.In two phase process, carcass 10 will be removed and move to second stage and finish bulging (not shown) from drum 15.In either case, carcass 10 is inflated with reception finished product tread strip 20, thereby produces finished product crude tyre 30.In a variation of the present invention, the RRO of crude tyre 30 uses bar code 35 as measuring with reference to point by measuring system 70.The RRO waveform is stored, and here is stored in the computer 80.Crude tyre 30 is moved to vulcanizing chamber, and the angle of orientation CAV_REF of tire is recorded there.Tire is loaded onto in the sulfuration chamber 40 and cures then.Vulcanized tyre 30 ' be moved to coherence measurement machine 50 to be used for measuring and writing down tire RFV.

[0033] Fig. 2 A shown be used for vulcanized tyre 30 ' the diagram of tested RFV.Abscissa is represented the girth of tire, and ordinate is represented radial force variation.Fig. 2 A is tested equally (as-measured) signal and is called as composite wave-shape.Composite wave-shape can comprise unlimited harmonic series.Individual harmonic can obtain by composite signal is used Fourier decomposition.Fig. 2 B and 2C have drawn respectively and have extracted first and second harmonic waves that produce from composite signal.The amplitude of the first harmonic of radial load VRM1 is defined as the difference between the minimum and maximum power.The phase angle of first harmonic VRA1 or azimuth are defined as the reference position that is used to measure and the angular difference between the maximum radial force position.Therefore, the sine wave that cartesian coordinate system is drawn among Fig. 2 B can be shown as the vector in the polar coordinate system comparably.Such vector polar coordinates are shown in Fig. 2 C on the right of sinusoidal pattern.The RFV vector of first harmonic VRH1 has the length that equals VRM1 and is rotated to the angle that equals azimuth VRA1.In a similar fashion, can extract the second harmonic vector V RH2 shown in Fig. 2 C, this vector has strength value VRM2 and azimuth VRA2.The corresponding polar coordinates and the H1 vector that are used for the H2 vector are similar, and difference is that angular coordinate is azimuthal twice now.

[0034] in the description of the example of following method, specific examples is limited at the optimization of first harmonic H1.Yet, can optimize different harmonic waves by using said method within the scope of the invention, H2 for example, H3 etc.Equally, following example has been described the optimization of radial force variation, yet can proofread and correct other uniformity characteristic by using said method within the scope of the invention, and for example vulcanized tyre radial deflection or side force change.In brief, described method can be passed through the suitable modification to following vector equation, and is used to optimize the harmonic wave of any measurable uniformity characteristic.

[0035] Fig. 3 is the vector polar diagram, and to two main influences of the first harmonic of after cure radial force variation, the wheel proloculum influences vector TR1 and vulcanizing chamber influences vector CR1 when optimizing application not in its demonstration.Vulcanized tyre as a result VRH1 be these two components vector and.Particular feature of the present invention is to optimize the after cure uniformity by handling these two component vectors.The ability of these influences is only just possible when each harmonic wave has been extracted in the processing vector space.

[0036] Fig. 4 has shown the diagram of optimizing step now.Crude tyre 30 is by the predetermined angle CAV_REF of rotation physically in this, thus its take turns proloculum and influence vector (TR1 ') direct now to influence vector CR1 opposite with vulcanizing chamber, the latter is fixed if the setting of vulcanizing equipment 40 or state do not change.Apparent this optimization has reduced after cure VRH1 ' as a result greatly.

[0037] description of front is the narration of simplifying greatly that influences the conforming factor of after cure.Wheel proloculum and vulcanizing chamber component vector both are the results of many individual factors or sub-vector.Each sub-vector all to vulcanized tyre RFV exerts an influence and these vectors had unit corresponding to radial force variation, i.e. kilogram.Fig. 5 has shown such sub-vector, is denoted as the influence of the crude tyre radial deflection of GR1*GN.The vector product of RRO (mm) and gain vector is given birth in this sub-vector representative, and described gain vector is to local radial stiffness (Kg/mm) modeling.Yet gain vector is not the simple scalar that is used for previous method, but causes the true vector around the circumferential radial stiffness variation of crude tyre 30.Remaining unidentified factor is incorporated among the intercept vector I1.If all factors all are known, intercept vector I1 will not exist so.In disclosing in the whole text, intercept vector I1 represents unidentified effect.

[0038] Fig. 6 further has a down dip and takes turns the proloculum sub-vector, and this sub-vector has shown first expression of instrument influence.Preferably when tire building is finished and at crude tyre from carrying out the measurement of crude tyre RRO before assembly drum 15 is removed.As exemplary example, measuring drum is tire assembly drum 15, single phase machine single drum, perhaps pair stage machines finishes drum.Also can in special measurement mechanism, carry out crude tyre RRO measurement in off line ground.In either case, the radial deflection of measuring drum can be introduced giving birth to the vacation influence of RRO vector.When crude tyre RRO was measured, the result was offset and is used for the skew sum of the drum of RRO measurement for true tire.Yet only crude tyre RRO exerts an influence to the after cure RFV of tire.As shown in Figure 6, method of the present invention comprises that owing to measuring drum sub-vector T2 is to solve this vacation RRO influence.

[0039] advantage of sub-vector also can be used to improve the vulcanizing chamber influence.The influence that is similar to aforementioned false RRO exists in order to measure after cure RFV.That is to say that measuring machine itself is introduced the influence to same detected tyre RFV.Fig. 7 has drawn and has solved the additional sub-vector UM1 of this influence, and this sub-vector has shown that tested radial load vector V RH1 and true radial load vector TVRH1's is poor.It is very little that this sub-vector has given the anglec of rotation CAV_REF shown in Fig. 4, but important correction, to be used to optimize VRH1.Studies show that and comprise that the UM1 sub-vector can make the value VRM1 of true radial load vector V RH1 improve about 0.5 to 1.0Kg.

[0040] former figures in the vector space is represented can be transformed into now and is following equation (1), wherein vector shown in the example of each representative graph 6 and sub-vector.Without departing from the scope of the invention, the described method also clear here added influence of describing that can be applied in Fig. 6, not draw.

VRH1=takes turns proloculum RH1+ vulcanizing chamber RH1 (1)

Substitution is used to take turns the final modeling equation of sub-vector generation of proloculum:

VRH1=(wheel proloculum RH1+ assembly drum+intercept)+vulcanizing chamber RH1 (2)

Or

VRH1＝GR1*GN+T2+I1+CR1 (3)

[0041] first step of the described method of execution is that image data is to set up the modeling equation.It is measured giving birth to RRO and VRH1 vector.Problem is estimated gain vector GN, assembly drum vector T2, and intercept vector I1 and vulcanizing chamber influence vector CR1.This realizes by vector rotation and regression analysis.

[0042] at first, the reference point of identification on the tire for example is applied to the bar code of carcass or product seam, and it will can be approaching during whole process.In the described here specific examples, the present invention comprises improvement to solve the radial deflection of measuring drum self.This influence is tangible when tire assembly drum 15 rouses as measurement.The loading angle FBD_REF that the measurement drum is gone up carcass is recorded.For this specific examples, to load the angle when the second stage of phase I of single phase or two stage machines is loaded measured when carcass 10.Advantageously in given tire sample, guarantee to load the multiple variation of angle FBD_REF, measure the influence of drum skew vector coefficients to guarantee accurately estimation.

[0043] then, the RRO of being installed to finished product crude tyre 30 when finishing on the stage assembly drum 15 when tire is measured by measurement mechanism 70.Select as another, the finished product crude tyre can be moved to independent measurement mechanism and carry out RRO here and measure.A plurality of tires are repeated this RRO to be measured so that the influence that is not modeled is randomized.There are the many known devices 70 that obtain the RRO measured value, for example use the contactless system of picture system or laser.Have been found that the system that is better than using radially imaging based on the system that is used to measure radial deflection of tangential imaging.The RRO data of obtaining thus are recorded in the computer 80.

[0044] then, each crude tyre 30 is sent to vulcanizing chamber and writes down the sign and the azimuth CAV_REF in the sulfuration chamber 40 that each crude tyre will cure therein or solidify, and each crude tyre is loaded onto in the sulfuration chamber at described azimuth.Advantageously in given tire sample, guarantee azimuthal multiple variation, to guarantee that accurately estimation sulfuration chamber is to the influence of vector coefficients.After each tire cures, vulcanized tyre 30 ' be moved to coherence measurement machine 50 to obtain the radial force variation RFV of each tire.The RFV data of obtaining thus also are recorded in the computer 80.

[0045] comprise uniformity machine sub-vector UM1 if model is extended to, the step that is used for the assembly drum vector that is similar to above-mentioned proposition so is applied to this coherence measurement machine.To load angle FBD_REF similar with the second stage carcass, is used for that tire curing loading angle UM_REF is recorded and is stored in computer 80 together with the relevant RFV data that are used for the tire sample on the coherence measurement machine.Can use then with identical vector analysis process described here sub-vector UM1 is added in the model to obtain assembly drum sub-vector T2.Described model will comprise value UMM1 and the azimuth UMA1 of additional a pair of coefficient with acquisition sub-vector UM1, thereby improve the estimation of after cure RFV.

[0046] in a single day obtain these data for suitable tire sample, harmonic data is extracted from RRO and RFV waveform.The first harmonic data GR1 (value FRM1 and azimuth FRA1) and the radial force variation VRH1 (value VRM1 and azimuth VRA1) that give birth to radial deflection in the present example are extracted respectively and store.Each vector in the above equation (2) has the value and the azimuth of previous definition.

[0047] for the ease of in manufacturing environment, using equation (3) fast, advantageously use digital computer to separate described equation.This need be converted to above vector equation one group of arithmetic equation in the Cartesian coordinates.In Cartesian coordinates, each vector or sub-vector have x component and the y component as shown in following example:

VRH1 _X=(VRM1) * COS (VRA1), and VRH1 _Y=(VRM1) * SIN (VRA1) (4)

Value and azimuthal scalar value of amount wherein represented in its bracket.Independent factor is converted to Cartesian coordinate from polar coordinates in a similar fashion:

GR1 _X＝FRM1·COS(FRA1) (5)

GR1 _Y＝FRM1·SIN(FRA1)

CAV_REF _X＝COS(CAV_REF) (6)

CAV_REF _Y＝SIN(CAV_REF)

FBD_REF _X＝COS(FBD_REF) (7)

FBD_REF _Y＝SIN(FBD_REF)

I1 _X＝IM1·COS(IA1) (8)

I1 _Y＝IM1·SIN(IA1)

Interdependent vector (VRH1 _X, VRH1 _Y) be the vector sum in the following equation.

VRH1 _X＝GN·FRM1·COS(θ+FRA1) + (9)

CM1·COS(CA1+CAV_REF) +

TM1·COS(TA1+FBD_REF) +

IM1·COS(IA1)

VRH1 _Y＝GN·FRM1·SIN(θ+FRA1) + (10)

CM1·SIN(CA1+CAV_REF) +

TM1·SIN(TA1+FBD_REF) +

IM1·SIN(IA1)

Expanding these equations with the constant formula of standard triangle obtains:

VRH1 _X＝GN·COS(θ)·FRM1·COS(FRA1)-GN·SIN(θ)·FRM1·SIN(FRA1)+

CM1·COS(CA1)·COS(CAV_REF)-CM1·SIN(CA1)·SIN(CAV_REF) +

TM1·COS(TA1)·COS(FBD_REF)-TM1·SIN(TA1)·SIN(FBD_REF) +

IM1·COS(IA1)

VRH1 _Y＝GN·COS(θ)·FRM1·SIN(FRA1)+GN·SIN(θ)·FRM1·COS(FRA1)+

CM1·COS(CA1)·SIN(CAV_REF)+CM1·SIN(CA1)·COS(CAV_REF) +

TM1·COS(TA1)·SIN(FBD_REF)+TM1·SIN(TA1)·COS(FBD_REF) +

IM1·COS(IA1)

In order to simplify the expansion equation, introduce following equation:

a＝GN·COS(θ)，b＝GN·SIN(θ) (11)

c＝CM1·COS(CA1)，d＝CM1·SIN(CA1) (12)

Equation (9) and (10) of these equation substitution extend types are obtained:

VRH1 _X＝a·GR1 _X - b · GR1 _Y +

c·CAV_REF _X - d · CAV_REF _Y + (13)

e·FBD_REF _X - f · FBD_REF _Y +

I1 _X

VRH1 _Y＝a·GR1 _Y + b · GR1 _X +

c·CAV_REF _Y + d · CAV_REF _X + (14)

e·FBD_REF _Y + f · FBD_REF _X +

I1 _Y

The form that matrix can be write as in the equation (13) of tight top and (14):

$\left|\begin{array}{c}{\mathrm{VRH}1}_X\\ {\mathrm{VRH}1}_Y\end{array}\right|=\left|\begin{array}{cccccccc}{\mathrm{GR}1}_X& -\mathrm{GR}{1}_Y& \mathrm{CAV}\_\mathrm{RE}{F}_X& -\mathrm{CAV}\_\mathrm{RE}{F}_Y& \mathrm{FBD}\_\mathrm{RE}{F}_X& -\mathrm{FBD}\_{\mathrm{<figure-callout\; id="1"\; label="REF\; Y"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">REF</figure-callout>}}_Y& 1& 0\\ {\mathrm{GR}1}_Y& {\mathrm{GR}1}_X& \mathrm{CAV}\_\mathrm{RE}{F}_Y& \mathrm{CAV}\_\mathrm{RE}{F}_X& \mathrm{FBD}\_\mathrm{RE}{F}_Y& \mathrm{FBD}\_\mathrm{RE}{F}_X& 0& 1\end{array}\right|\&times;\left|\begin{array}{c}a\\ b\\ c\\ d\\ e\\ f\\ I_X\\ I_Y\end{array}\right|---\left(15\right)$

(a, b), (c, d), (e is f) with (I1 when the predictive coefficient vector _X, I1 _Y) when known, top equation (15) provides the modeling equation, by this modeling equation can the estimating individual tire the VRH1 vector.This fundamental formular also may be modified as and comprises other process element reconciliation organization of production plan never together.These coefficient vectors can obtain to solve above matrix equation by various known mathematical methods.

[0048] in manufacturing environment, for the ease of the using in real time and upgrade of coefficient, this method is easier when estimating to determine described coefficient simultaneously by least square regression is implemented.All coefficients that are used for all assembly drums and chamber can solve a separate regression steps.At last, vector coefficients is stored in the database in order to using in the future.Example for single mold and single sulfuration chamber, described coefficient has following physical significance: (a, b) be that unit is the gain vector GN of kgf/mm, (c, d) be that unit is that the vulcanizing chamber of kgf influences vector CR1, (e is that unit is the assembly drum vector T2 of kgf f), and (I1X is that unit is the intercept vector I1 of kgf I1Y).

[0049] equation of listing above is used for a sulfuration chamber and an assembly drum.Described sulfuration chamber is nested factor with assembly drum, comprises many assembly drums and many chambeies although mean true process, and each tire will only be seen in each.Therefore complete equation will comprise the vector that is used for each assembly drum and each sulfuration chamber as follows.Expand described model and at first need to produce following matrix V _{I, j}, C _{I, j}And X _{I, j}, wherein subscript " i " is represented mould i, and wherein following table " j " expression make-up machine rouses j, and subscript is illustrated in the tire that assembly drum " j " is gone up manufacturing and sulfuration in vulcanizing chamber " i " to " i, j ":

$V_{i,j}=\left|\begin{array}{c}{\mathrm{VRM}1}_x\\ {\mathrm{VRM}1}_y\end{array}\right|$ $C_{i,j}=\left|\begin{array}{c}a\\ b\\ c\\ d\\ e\\ f\\ {I1}_x\\ {I1}_y\end{array}\right|$

$X_{i,j}=\left|\begin{array}{cccccccc}{\mathrm{FRM}1}_x& -{\mathrm{FRM}1}_y& \mathrm{CAV}\_\mathrm{RE}{F}_x& -\mathrm{CAV}\_\mathrm{RE}{F}_y& \mathrm{FBD}\_\mathrm{RER}{F}_x& {\mathrm{FBD}\_\mathrm{<figure-callout\; id="1"\; label="REF\; y"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">REF</figure-callout>}}_y& 1& 0\\ {\mathrm{FRM}1}_y& {\mathrm{FRM}1}_x& \mathrm{CAV}\_\mathrm{RE}{F}_y& {\mathrm{CAV}\_\mathrm{REF}}_x& {\mathrm{FBD}\_\mathrm{REF}}_y& {\mathrm{FBD}\_\mathrm{REF}}_x& 0& 1\end{array}\right|$

So the above equation of given combination (by i and j index) for mould and make-up machine drum can be represented with simple matrix form:

V _i，j＝X _i，j×C _i，j (16)

This equation can be expanded with a plurality of moulds of simultaneous adaptation and a plurality of make-up machine drum in the Matrix Formula below:

$|\left|\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">V</figure-callout>}}_{\mathrm{1,1}}\\ {\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="V"\; filenames="C20048003411700261.png"\; state="\{\{state\}\}">V</figure-callout>\; </figure-callout>}}_{\mathrm{1,2}}\\ .\\ .\\ {\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">V</figure-callout>}}_{1,\mathrm{<figure-callout\; id="2"\; label="m\; V"\; filenames="C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="m\; V"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">m</figure-callout>\; </figure-callout>}}& \\ V_{}{}_{}{}_{\mathrm{2,1}}\\ .\\ .\\ V_{n,m}\end{array}\right|=|\begin{array}{ccccccccc}{\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="X"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">X</figure-callout>\; </figure-callout>}}_{\mathrm{1,1}}& 0& .& .& 0& 0& .& .& 0\\ 0& {\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="X"\; filenames="C20048003411700261.png"\; state="\{\{state\}\}">X</figure-callout>\; </figure-callout>}}_{\mathrm{1,2}}& .& .& 0& 0& .& .& 0\\ .& .& .& .& .& .& .& .& .\\ .& .& .& .& .& .& .& .& .\\ 0& 0& .& .& {\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">X</figure-callout>}}_{1,m}& 0& .& .& 0\\ 0& 0& .& .& 0& {\mathrm{<figure-callout\; id="2"\; label="X"\; filenames="C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="X"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">X</figure-callout>\; </figure-callout>}}_{\mathrm{2,1}}& .& .& 0\\ .& .& .& .& .& .& .& .& .\\ .& .& .& .& .& .& .& .& .\\ 0& 0& .& .& 0& 0& .& .& C_{n,m}\end{array}|\&times;\left|\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">C</figure-callout>}}_{\mathrm{1,1}}\\ {\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="C"\; filenames="C20048003411700261.png"\; state="\{\{state\}\}">C</figure-callout>\; </figure-callout>}}_{\mathrm{1,2}}\\ .\\ .\\ {\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">C</figure-callout>}}_{1,\mathrm{<figure-callout\; id="2"\; label="m\; C"\; filenames="C20048003411700261.png"\; state="\{\{state\}\}">\; <figure-callout\; id="1"\; label="m\; C"\; filenames="C20048003411700251.png,C20048003411700261.png"\; state="\{\{state\}\}">m</figure-callout>\; </figure-callout>}}& \\ C_{}{}_{}{}_{\mathrm{2,1}}\\ .\\ .\\ C_{n,m}\end{array}\right||---\left(18\right)$

[0050] final step is to use described model to optimize the RFV of individual tire when individual tire is manufactured according to example shown in Figure 4.Each tire assembly drum carries sign " j ", and sign " i " is carried in each sulfuration chamber.Each tire carries unique recognition device, for example bar code.These identification labels allow step afterwards to retrieve the information that writes down into individual tire.When tire building finishes, give birth to measured and its harmonic wave value FRM1 of RRO and azimuth FRA1 in company with moulding or measure drum and go up the loading angle FBD_REF of tire and be recorded.When crude tyre arrives in the vulcanizing chamber, it will be determined in advance sulfureted therein sulfuration chamber, and the vulcanizing chamber that is used for described chamber influence Vector Message can be from database retrieval.Reading device scans unique bar code with the identification tire, thereby is convenient to the polling data storehouse to find tire information measured and record: FRM1 and FRA1, assembly drum sign and loading angle FBD_REF.Then, calculate to influence vector by following equation estimation wheel proloculum.It should be noted that equation (17) is identical with (10) with above equation (9) in form with (18), but be used with of the influence of estimation wheel proloculum with prediction mode now sulfuration RFV.

TR1 _X＝a·GR1 _X - b · GR1 _Y +

e·FBD_REF _X - f · FBD_REF _Y + (19)

I1 _X

TR1 _Y＝a·GR1 _Y + b · GR1 _X +

e·FBD_REF _Y + f · FBD_REF _X + (20)

I1 _Y

The wheel proloculum influences the arc tangent of the azimuth TRA1 amount of being (TR1Y/TR1X) of vector TR1, and vulcanizing chamber influences the arc tangent of the azimuth CA1 amount of being (d/c) of vector CA1.Refer again to Fig. 4, crude tyre 30 is rotated so that its angle of orientation CAV_REF with respect to sulfuration chamber 40 is such, and the azimuth TRA1 that feasible prediction wheel proloculum influences vector is opposite with the azimuth CA1 that vulcanizing chamber influences vector.This operation can be by following The Representation Equation:

CAV_REF＝180+TRA1-CA1 (21)

Then crude tyre 30 angle of orientation CAV_REF be loaded onto the sulfuration chamber 40 in, the described angle of orientation make vulcanized tyre 30 ' in RFV minimize.

[0051] when implementing above method with a plurality of tire assembly drums and a plurality of sulfurations chamber, so the institute of described method is in steps, determines vector coefficients, estimation after cure RFV, and optimize the after cure uniformity, all be performed by the specific identifier that uses treatment facility.By this way, can in the sulfuration chamber of RFV level, cure at the tire of producing on any make-up machine with optimization.

[0052] do not have under the situation of unique identification bar code at tire, can not in vulcanizing chamber, carry out whole optimizing process.In this case, tire must be labeled the azimuth TRA1 that influences vector TR1 with the indicator wheel proloculum when tire is on tyre building machine.The wheel proloculum that uses the vector Return Law to calculate crude tyre influences the azimuth of vector, and mark is placed on the tire corresponding to azimuth TRA1.In addition, before with the vulcanizing chamber sulfuration chamber 40 that influenced relative azimuth (CA1-180) mark of vector CA1 diameter.When crude tyre 30 is sent to vulcanizing chamber and arrive sulfuration chamber 40, be used to indicate the mark that applies in advance of azimuth TRA1 to aim on the tire 30 with the mark that applies in advance on the sulfuration chamber 40.By this way, the wheel proloculum influences vector TR1 and vulcanizing chamber and influences the opposite each other and after cure VRH1 of vector with optimised.

[0053] another advantage of the present invention and specific characteristic be to use the Data Update predictive coefficient vector measured from each individual tire (a, b), (c, d), (e, f) and (IX is IY) to solve the lasting variation that interrelates with complex fabrication process.Because the livings RRO of individual tire and sulfuration RFV are measured continuously, therefore can be with these new generation data new model more in periodic interval, thus for the variation in the process predictive equation is adjusted.These renewals can append to available data or be used to calculate one group of new, predictive coefficient vector independently, and described coefficient vector can replace initial data.

[0054] Fig. 8 is the vector polar diagram of extended method of the present invention, and it has shown the influence to the crude tyre vector GR1*GN of optional feature influence, and described influence is because the crude tyre carcass, tyre surface and band assembly, and the phase I drum, the instrument influence of tyre surface and band assembly drum and transfer ring.This can be by vector equation the suitable modification of aforementioned system realize.Crude tyre influences vector GR1*GN now can be by describing corresponding to the component sub-vector of one group of tyre element subassembly and one group of instrument influence.Crude tyre vector GR1*GN shows as now:

GR1*GN＝GR1C*GNC+GR1T*GNT+T1+T3+T4 (22)

Describing the estimated vector equation (3) of taking turns proloculum and influencing vector TR1 becomes:

TR1＝GR1C*GNC?GR1T*GNT+T1+T2+T3+T4 (23)

And estimated after cure uniformity still with equation (1) in identical:

VRH1＝TR1+CR1 (24)

Wherein TR1 is represented by new equation (23) now.Those skilled in the art can be according to before expanding the wheel proloculum vector equation (23) of predictive equation group with the correspondence expansion as the described same procedure of vector equation (4) to (15).Following result has shown x and the y component of RFV:

VRH1 _X＝a·GR1C _X - b · GR1C _Y + (25)

c·GR1T _X - d · GR1T _Y +

h·CBD_REF _X?- j · CBD_REF _Y +

k·FBD_REF _X?- m · FBD_REF _Y +

n·SBD_REF _X?- p · SBD_REF _Y +

q·TSR_REF _X?- r · TSR_REF _Y +

s·CAV_REF _X?- t · CAV_REF _Y +

I1 _X

VRH1 _Y＝a·GR1C _Y + b · GR1C _X + (26)

c·GR1T _Y + d · GR1T _X +

h·CBD_REF _Y?+ j · CBD_REF _X +

k·FBD_REF _Y?+ m · FBD_REF _X +

n·SBD?REF _Y?+ p · SBD_REF _X +

q·TSR_REF _Y?+ r · TSR_REF _X +

s·CAV_REF _Y?+ t · CAV_REF _X +

I1 _Y

A plurality of linear regression routine be used for estimating simultaneously coefficient vector (a, b), (c, d), (h, j), (k, m), (n, p), (q, r), (s, t) and (I1 _X, I1 _Y).Vector coefficients has physical significance.(a is that carcass gain vector GC and unit will be kgf/mm b) to vector.(c is that tyre surface and band assembly gain vector GT and unit will be kgf/mm d) to vector.(h is that phase I assembly drum instrument vector T1 and unit are kgf j) to vector.(k is that second stage assembly drum instrument vector T2 and unit are kgf m) to vector.(n is that tyre surface and band assembly forming drum instrument vector T3 and unit are kgf p) to vector.(q is that transfer ring instrument vector T4 and unit are kgf r) to vector.(s is that vulcanizing chamber influences vector CR1 and unit is kgf t) to vector.Vector (I1 _X, I1 _Y) be that intercept vector and unit are kgf.

[0055] after the program step of formerly describing, can realize extended model with following exemplary approach.In the step of determining vector coefficients, except additional step, implement this method as discussed previouslyly.For example, if model will comprise phase I assembly drum sub-vector T1, the data of tire sample must comprise that the carcass on the record phase I drum loads angle CBD_REF so.Solve crude tyre carcass sub-vector GR1C and carcass gain G NC similarly, the measurement of the RRO of green tire body also is necessary.Here the term carcass represents that crude tyre deducts tyre surface and the remaining parts of band assembly.The subassembly that this normally obtains from phase I of two stage forming processes.The tyre surface and the band assembly that are generally used for these tyre elements on the module of this assembly of moulding by measurement load angle SBD_REF, measure the livings RRO of the assembly on the moulding module afterwards, can comprise tyre surface similarly and be with assembly sub-vector GR1T and tyre surface gain G NT.At last, the transfer ring instrument influences the uniformity influence that the T4 solving device causes, described device is used for tyre surface and band assembly 20 are sent to the position that engages with the green tire body from the moulding module.The measured value of loading angle TSR_REF in the transfer ring has solved instrument influences T4.

[0056] these tires cure in sulfurizing mould then as before, measure after cure RFV afterwards.The unknowm coefficient that is used for sub-vector series is determined by regression analysis in synchronous step.At last, in case the sub-vector coefficient is known, use described equation with prediction mode.Fig. 8 has shown the result of equation (22) with figure, and wherein additional sub-vector provides a kind of alternative means, can influence vector TR1 for individual tire estimation wheel proloculum by these means.

[0057] uses described model then to optimize the after cure RFV of individual tire.Here the step application of Miao Shuing is in two stage forming processes, and wherein carcass and tyre surface and band assembly are engaged to finish tire by moulding then as parts independently.This method can be applied to other tire moulding method within the scope of the invention.Particularly will use the coefficient of in the model building step, deriving to carry out the optimization of these tire building steps.Tool using influence and the influence of tested radial deflection, the best relative tool face angle of carcass 10 and tyre surface and band assembly 20 will produce and be labeled on element or preferably rotate to chosen angle automatically by control system of machine.When tire building began, phase I assembly drum sign was recorded, afterwards the moulding carcass.Then, carry out on phase I drum that carcass RRO measures and carcass influences vector GR1C*GC and calculated.Know the instrument influence by instrument vector T1.As another selection, can on the second stage assembly drum, carry out carcass RRO and measure, in this case can tool using vector T1 and T2.Tyre surface and band assembly step are used band and tread strip afterwards from being recorded as pattern spare sign.Then, on module, measure tyre surface and band assembly RRO and calculating tyre surface and band component influences vector GR1T*GT.Know the instrument influence of moulding module by instrument vector T3.At last, recorded information is with identification second stage assembly drum, transfer ring drum and instrument vector T2 separately, and T4.

[0058] can be in several versions the optimizing application method, this depends on the complexity of manufacturing equipment.For the example shown in Fig. 1, described equipment allows for sign and azimuth mark tyre element.Described equipment also allows to select sulfurizing mould and at the azimuth of determining from model tire is loaded into the sulfurizing mould.In this case, reduce after cure RFV by moulding crude tyre 30, the wheel proloculum that described crude tyre has influences the value that value equals or vulcanizing chamber influences vector CR1 no better than of vector TR1.Fig. 9 illustrates this variation.The wheel proloculum of optimizing influences vector TR1 and is shown as dotted line now and is complementary to show the value that its value and vulcanizing chamber influence vector CR1.Specifically, Fig. 9 has shown that further crude tyre influences the manipulation of vector GR1C*GN, and it is also shown by dotted line.When being loaded in the sulfurizing mould to coupling after the tire, two kinds of influences are almost equal and opposite, so after cure RFV is minimized.In fact, the error of measurement and model accuracy makes impossible expectation produce the tire of zero after cure RFV.If manufacturing equipment is not too complicated and do not allow to be loaded in the sulfurizing mould, can use optimization to minimize so simply to make the wheel proloculum influence vector TR1 separately.

[0059] two examples before optimization method is applied to similarly.At first, depend on manufacturing environment selection optimization criterion.In the above in first example, the sulfurizing mould of expection be known and its vulcanizing chamber separately to influence vector CR1 be known.Optimization criterion is the value CM1 that vulcanizing chamber influences vector CR1.In second example, optimization criterion is set to any desirable level in the above.For example, influence vector TR1 in order to reduce to take turns proloculum, optimization criterion is set to zero.

[0060] optimization method is used to determine that one group of best angle of loading on second stage assembly drum FBD_REF and the transfer ring TSR_REF is the tire of CM1 to produce predetermined value.Vulcanizing chamber azimuth CAV_REF is determined simultaneously in order to using in the future.The vector system of just having described is formed for the estimated reaction surface that proloculum influences vector TR1 of taking turns as the function of component sub-vector.Described reaction surface can have single maximum or some local maximums.Have been found that and to use known non-linear, the definite effectively preferred plan of steepest descent method based on the commercial coding that obtains.When being used for described method, use one group of above initial value operation steepest letdown procedure to have increased access to the probability of preferred plan.Other optimization method also is possible, quadratic programming for example, and linear decline, perhaps or even exhaustive search.Following step is to load the angle according to the best to finish tire 30.Tyre surface and band assembly 20 are loaded on the transfer ring of top at predetermined angle TSR_REF, and carcass 10 is loaded on the second stage assembly drum at predetermined angle FBD_REF.Carcass 10 can be inflated and join to tyre surface then and be with assembly 20 to finish crude tyre 30.As the optional step that is used to check, the preceding sulfuration RRO of finished tire can measured stability with assessment models.In last step, crude tyre 30 is moved to vulcanizing chamber, be loaded onto the sulfuration chamber 40 at the azimuth of determining from CAV_REF then, described azimuth make vulcanized tyre 30 ' in RFV minimize.The experimental result that obtains in the inspection period of this method shows that the present invention can obviously solve more a high proportion of vulcanized tyre RFV than the existing method that is used for similar manufacture process.

[0061] be applied to only minimize the wheel proloculum when influencing vector TR1 when described method, optimizer is determined angle FBD_REF and TSR_REF.Carcass 20 and tyre surface and band assembly 20 are loaded to finish tire 30 in these predetermined angle.In last step, crude tyre 30 is moved to vulcanizing chamber, is loaded onto then in any sulfuration chamber 40 and does not have a loading angle that notes in the chamber 40.

[0062] is to be understood that in the scope that does not break away from appended claim and equivalent thereof, the present invention includes the various modifications that to carry out tire manufacturing method as described herein.

Claims (18)

1. conforming method of after cure that is used to improve tire comprises:

(a) be identified for estimating one group of vector coefficients of the after cure radial force variation of tire;

(b) the after cure uniformity of estimating individual tire comprises step by step following:

(i) the preceding sulfuration radial deflection characteristic of the described individual tire of measurement;

(ii) select the harmonic wave of radial force variation to be optimized;

(c) optimize the after cure uniformity of described individual tire from described vector coefficients, comprise step by step following:

(i) estimate the loading angle of one or more tyre elements according to optimization criterion;

(ii) described tyre element is loaded on the corresponding fabrication tool at described loading angle.

2. the conforming method that is used to improve tire according to claim 1 further may further comprise the steps: aim at described individual tire at predetermined vulcanizing chamber azimuth, described individual tire is loaded in the sulfurizing mould, and vulcanizes described tire.

3. the conforming method that is used to improve tire according to claim 1, wherein said tyre element comprises carcass, described instrument comprises the second stage assembly drum.

4. the conforming method that is used to improve tire according to claim 1, wherein said tyre element comprise tyre surface and band assembly, and described instrument comprises shaping mould spare.

5. the conforming method that is used to improve tire according to claim 1, wherein said optimization criterion are that the wheel proloculum influences the value of vector and equals the value that vulcanizing chamber influences vector.

6. the conforming method that is used to improve tire according to claim 1, wherein said optimization criterion are that the wheel proloculum influences the value of vector and equals zero.

7. the conforming method that is used to improve tire according to claim 1, wherein said vector coefficients comprises that vulcanizing chamber influences vector.

8. the conforming method that is used to improve tire according to claim 1, wherein take turns proloculum influence vector comprise before vulcanized tyre influence vector, the vector of assembly drum vector and intercept vector with.

9. the conforming method that is used to improve tire according to claim 1 determines that wherein the step of described vector coefficients comprises the multivariable least square regression.

10. the conforming method that is used to improve tire according to claim 1 is wherein measured described radial deflection characteristic on a place of carcass or many places, tire tread and band assembly or finished tire.

11. the conforming method that is used to improve tire according to claim 1 is wherein measured described radial deflection characteristic on finished tire.

12. a conforming method that is used to improve tire may further comprise the steps:

(a) be identified for estimating one group of vector coefficients of the after cure radial force variation of tire;

(b) make individual tire;

(c) the after cure uniformity of the described individual tire of estimation comprises step by step following:

(i) the preceding sulfuration radial deflection characteristic of the described individual tire of measurement;

(ii) select the harmonic wave of radial force variation to be optimized;

(iii) estimate described after cure uniformity from described vector coefficients;

(d) aim at described individual tire at predetermined vulcanizing chamber azimuth, described individual tire is loaded in the sulfurizing mould, and vulcanizes described tire.

13. the conforming method that is used to improve tire according to claim 12 determines that wherein the step of one group of vector coefficients further comprises step by step following:

(i) the preceding sulfuration radial deflection characteristic of a plurality of tires of measurement at least one predetermined process during making described tire;

(ii) write down each described tire in sulfurizing mould the loading angle and vulcanize described tire;

(iii) be that each described tire is measured the after cure radial force variation;

(iv) extract the preceding sulfuration radial deflection of described tire and at least one harmonic wave of radial force variation;

(the sulfuration radial deflection one group vector coefficients relevant before v) determining to make with the after cure radial force variation of the described tire that in described mould, vulcanizes; And

(vi) store described vector coefficients.

14. the conforming method that is used to improve tire according to claim 12, the step of wherein determining one group of vector coefficients further comprises the loading angle of record carcass on measurement mechanism step by step, and the conforming step of after cure of estimating described individual tire further comprise write down described individual tire the loading angle of carcass on described measurement mechanism step by step.

15. the conforming method that is used to improve tire according to claim 1 determines that wherein one group of vector coefficients and the conforming described step of estimation after cure comprise the multivariable least square regression corresponding to one group of matrix equation in a plurality of assembly drums and a plurality of sulfurations chamber.

16. the conforming method that is used to improve tire according to claim 1 further is included as specific assembly drum and is the step of specific sulfuration chamber record identification.

17. the conforming method that is used to improve tire according to claim 1 determines that wherein the step of one group of vector coefficients further comprises the loading angle of record vulcanized tyre on the coherence measurement machine step by step.

18. the conforming method that is used to improve tire according to claim 1 is wherein used from the data of described individual tire and is repeatedly upgraded the step of determining one group of vector coefficients.

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