CN105701069A - Tire predicted mileage estimation method based on unit wear - Google Patents

Abstract

The invention provides a tire predicted mileage estimation method based on unit wear. The method comprises the steps of measuring tread groove depth and tread block heel-toe-shaped wear respectively, averaging heel-toe-shaped wear of adjacent tread blocks after obtaining the mid value of tread block heel-toe-shaped wear, then obtaining the groove depth value of each tread groove after heel-toe-shaped wear influences are eliminated, repeatedly calculating the tread groove depth value based on different mileages, averaging unit wear obtained through multiple times of measurement to obtain average unit wear, and then estimating predicated mileage. Tread block heel-toe-shaped wear calculation is conducted, predicted mileage is estimated by eliminating the influences of heel-toe-shaped wear on tread groove depth measurement based on unit wear, and predicted mileage calculation and analysis efficiency and precision are improved.

Description

Mileage evaluation method estimated by tire based on unit wear

Technical field

The present invention relates to tyre technology, be specifically related to a kind of tire based on unit wear and estimate mileage evaluation method。

Background technology

Along with market is more and more higher to the requirement of tire, the development efficiency of new product is also improving, the mode simultaneously evaluating tyre performance is also diversified, wherein tire path examination is closest with market condition before launch is also maximally effective evaluation method, so effectively processing of tire path test result is also most important。Also there is not the road examination processing method of detail specification at present, and each tire producer or tire engineer have respective processing method, but system is not with comprehensive。Existing computational methods obtain tire wear data either directly through distance travelled divided by grinding off ditch depth, do not take into account the different mill situation of tire, and causing that the expectation mileage of tire is not accurate enough affects discriminatory analysis。

Summary of the invention

In order to calculate the expectation mileage of tire fast and effectively, the present invention provides a kind of tire based on unit wear to estimate mileage evaluation method。

For solving above-mentioned technical problem, the present invention adopts the following technical scheme that

Mileage evaluation method estimated by a kind of tire based on unit wear, comprises the steps:

1) divide equally n tyre surface position of measurement along tire circumference, choose the groove having abrasion labelling the ditch depth radially measuring m groove to tire successively, wherein n >=3, m >=3, be denoted as respectively:

hs_1-1, hs_1-2... hs_1-m；

hs_2-1, hs_2-2... hs_2-m；

…

hs_n-1, hs_n-2... hs_n-m；

2) be averaged calculating by n measured value of same groove, is denoted as respectively:

AVERAGE(hs_1-1,hs_2-1,…hs_n-1)；

AVERAGE(hs_1-2,hs_2-2,…hs_n-2)；

…

AVERAGE(hs_1-m,hs_2-m,hs_n-m)；

3) measuring wearing away with toe shape of the identical position measurement pattern block of groove depth, and radially measuring k pattern block along tire successively, each pattern block radially takes j measurement point along tire, wherein k >=m+1, j >=3, is denoted as respectively:

D_1-1-1, D_1-1-2... D_1-1-j；D_1-2-1, D_1-2-2... D_1-2-j；... D_1-k-1, D_1-k-2... D_1-k-j；

D_2-1-1, D_2-1-2... D_2-1-j；D_2-2-1, D_2-2-2... D_2-2-j；... D_2-k-1, D_2-k-2... D_2-k-j；

…

D_n-1-1, D_n-1-2... D_n-1-j；D_n-2-1, D_n-2-2... D_n-2-j；... D_n-k-1, D_n-k-2... D_n-k-j；

4) taking j and measure the intermediate value that some pattern block wears away with toe shape, be averaged calculating by the intermediate value with the abrasion of toe shape of adjacent lugs, is denoted as respectively:

AVERAGE(D_1-1-Me,D_1-2-Me,D_2-1-Me,D_2-2-Me,…D_n-1-Me,D_n-2-Me)；

AVERAGE(D_1-2-Me,D_1-3-Me,D_2-2-Me,D_2-3-Me,…D_n-2-Me,D_n-3-Me)；

…

AVERAGE(D_1-(k-1)-Me,D_1-k-Me,D_2-(k-1)-Me,D_2-k-Me,…D_n-(k-1)-Me,D_n-k-Me)；

5) by step 2) value of calculation deduct step 4) value of calculation, obtain each groove remove with toe shape abrasion impact after ditch depth value, be averaged calculate obtain first time measure decorative pattern ditch depth value hs1；

6) the unit wear A of tire is calculated₁, formula is as follows:

$A_1=\frac{L_1}{H-{\mathrm{hs}}_1}$

Wherein L₁For the distance travelled that first time measures, H is new tyre ditch depth；

7) steps 1 are repeated based on different distance travelleds) to step 6), the unit wear of N-1 measurement after obtaining, wherein N is integer, is denoted as respectively: A₂, A₃... A_N；

8) be averaged calculating by the unit wear that n times are measured, and obtains mean unit abrasion A₀；

9) expectation mileage L is calculated₀, formula is as follows:

L₀=A₀*(H-h)

Wherein h is the tire wear indicator degree of depth。

Preferably, step 1) in, the ditch depth of groove adopts depth indicator to measure, and during measurement, the cantilever of this depth indicator rides over the high point position of tested groove both sides pattern block。

Preferably, step 3) in, measuring with the abrasion employing depth indicator of toe shape of pattern block, during measurement, the cantilever of this depth indicator rides over the high point position of front and back pattern block。

Preferably, step 3) in, pattern block radially takes 3 along tire and measures points, respectively the middle part of the flex point of pattern block both sides and pattern block。

By above technical scheme it can be seen that present invention introduces calculating with the abrasion of toe shape of pattern block, wear away the impact of the measurement on decorative pattern ditch depth with toe shape by eliminating and adopt unit wear to estimate expectation mileage, improve the efficiency and precision of estimating mileage calculation analysis。

Accompanying drawing explanation

Fig. 1 is the distribution situation of pattern block and groove in the preferred embodiment of the present invention；

Fig. 2 is the schematic diagram measuring groove ditch depth in the preferred embodiment of the present invention；

Fig. 3 measures the schematic diagram that pattern block wears away with toe shape in the preferred embodiment of the present invention；

Fig. 4 be in the preferred embodiment of the present invention pattern block along tire radially 3 measure point the location drawing。

Detailed description of the invention

Below in conjunction with accompanying drawing, a kind of preferred implementation of the present invention is described in detail。

As it is shown in figure 1, tire of the present invention estimates that mileage evaluation method is applicable to drive position pattern type, there is crisscross groove, and pattern block is shaped as rectangle or polygon。

Measure firstly the need of to decorative pattern ditch depth, divide equally 3 tyre surface positions of measurement along tire circumference, choose the groove having abrasion labelling the ditch depth radially measuring 4 grooves to tire successively, be denoted as respectively:

hs_1-1, hs_1-2, hs_1-3, hs_1-4；

hs_2-1, hs_2-2, hs_2-3, hs_2-4；

hs_3-1, hs_3-2, hs_3-3, hs_3-4；

Then same groove is averaged calculating at 3 measured values of tire circumference, is denoted as respectively:

$\begin{array}{c}\mathrm{AVERAGE}({\mathrm{hs}}_{1-1},{\mathrm{hs}}_{2-1},{\mathrm{hs}}_{3-1});\\ \mathrm{AVERAGE}({\mathrm{hs}}_{1-2},{\mathrm{hs}}_{2-2},{\mathrm{hs}}_{3-2});\\ \mathrm{AVERAGE}({\mathrm{hs}}_{1-3},{\mathrm{hs}}_{2-3},{\mathrm{hs}}_{3-3})\\ \mathrm{AVERAGE}({\mathrm{hs}}_{1-4},{\mathrm{hs}}_{2-4},{\mathrm{hs}}_{3-4});\end{array}---\left(1\right)$

Owing to block-type tread pattern block elder generation ground end in the rolling and earth surface are deformed, this deformation is gradually transferred to the liftoff end of pattern block along with the rolling of pattern block, when liftoff, the strain energy of distortion of pattern block discharges from liftoff end, so the pattern block part of liftoff end and ground produce Relative sliding thus produce abrasion, thus phenomenon low after height before producing, i.e. the wearing away with toe shape of pattern block。Therefore needing to adopt depth indicator in decorative pattern ditch depth measurement, during measurement, the cantilever of this depth indicator rides over the high point position of tested groove both sides pattern block, with reference to Fig. 2。

Measuring wearing away with toe shape of identical 3 the position measurement pattern blocks of groove depth, and radially measuring 6 pattern blocks along tire successively, each pattern block radially takes 3 along tire and measures points, respectively the middle part of the flex point of pattern block both sides and pattern block, with reference to Fig. 4。The result measured is denoted as respectively:

D_1-1-1, D_1-1-2, D_1-1-3；D_1-2-1, D_1-2-2, D_1-2-3；D_1-3-1, D_1-3-2, D_1-3-3；

D_1-4-1, D_1-4-2, D_1-4-3；D_1-5-1, D_1-5-2, D_1-5-3；D_1-6-1, D_1-6-2, D_1-6-3；

D_2-1-1, D_2-1-2, D_2-1-3；D_2-2-1, D_2-2-2, D_2-2-3；D_2-3-1, D_2-3-2, D_2-3-3；

D_2-4-1, D_2-4-2, D_2-4-3；D_2-5-1, D_2-5-2, D_2-5-3；D_2-6-1, D_2-6-2, D_2-6-3；

D_3-1-1, D_3-1-2, D_3-1-3；D_3-2-1, D_3-2-2, D_3-2-3；D_3-3-1, D_3-3-2, D_3-3-3；

D_3-4-1, D_3-4-2, D_3-4-3；D_3-5-1, D_3-5-2, D_3-5-3；D_3-6-1, D_3-6-2, D_3-6-3；

Taking 3 and measure the intermediate value that some pattern block wears away with toe shape, be averaged calculating by the intermediate value with the abrasion of toe shape of adjacent lugs, is denoted as respectively:

$\begin{array}{c}\mathrm{AVERAGE}(D_{1-1-\mathrm{Me}},D_{1-2-\mathrm{Me}},D_{2-1-\mathrm{Me}},D_{2-2-\mathrm{Me}},D_{3-1-\mathrm{Me}},D_{3-2-\mathrm{Me}});\\ \mathrm{AVERAGE}(D_{1-2-\mathrm{Me}},D_{1-3-\mathrm{Me}},D_{2-2-\mathrm{Me}},D_{2-3-\mathrm{Me}},D_{3-2-\mathrm{Me}},D_{3-3-\mathrm{Me}});\\ \mathrm{AVERAGE}(D_{1-3-\mathrm{Me}},D_{1-4-\mathrm{Me}},D_{2-3-\mathrm{Me}},D_{2-4-\mathrm{Me}},D_{3-3-\mathrm{Me}},D_{3-4-\mathrm{Me}});\\ \mathrm{AVERAGE}(D_{1-4-\mathrm{Me}},D_{1-5-\mathrm{Me}},D_{2-4-\mathrm{Me}},D_{2-5-\mathrm{Me}},D_{3-4-\mathrm{Me}},D_{3-5-\mathrm{Me}});\\ \mathrm{AVERAGE}(D_{1-5-\mathrm{Me}},D_{1-6-\mathrm{Me}},D_{2-5-\mathrm{Me}},D_{2-6-\mathrm{Me}},D_{3-5-\mathrm{Me}},D_{3-6-\mathrm{Me}});\end{array}---\left(2\right)$

Measuring point owing to have employed 3, pattern block takes the value of middle size with the intermediate value that toe shape wears away。Measuring with the abrasion employing depth indicator of toe shape of pattern block, during measurement, the cantilever of this depth indicator rides over the high point position of front and back pattern block, with reference to Fig. 3。

The value of calculation of formula (1) is deducted the value of calculation of formula (2), obtain each groove and remove the ditch depth value after with the abrasion impact of toe shape, it is averaged and calculates the decorative pattern ditch depth value hs1 obtaining first time measurement, calculate the unit wear A measuring tire for the first time₁, formula is as follows:

$A_1=\frac{L_1}{H-{\mathrm{hs}}_1}$

Wherein L₁For the distance travelled that first time measures, H is new tyre ditch depth。

Based on different distance travelled repeat the above steps, the unit wear that after obtaining, 5 times are measured, it is denoted as respectively: A₂、A₃、A₄、A₅、A₆。

Be averaged calculating by the unit wear that 6 times are measured, and obtains mean unit abrasion A₀, calculate and estimate mileage L₀, formula is as follows:

L₀=A₀*(H-h)

Wherein h is the tire wear indicator degree of depth。

The above embodiment is only that the preferred embodiment of the present invention is described; not the scope of the present invention is defined; under the premise designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention are determined。

Claims (4)

1. mileage evaluation method estimated by the tire based on unit wear, it is characterised in that comprise the steps:

1) divide equally n tyre surface position of measurement along tire circumference, choose the groove having abrasion labelling the ditch depth radially measuring m groove to tire successively, wherein n >=3, m >=3, be denoted as respectively:

hs_1-1, hs_1-2... hs_1-m；

hs_2-1, hs_2-2... hs_2-m；

…

hs_n-1, hs_n-2... hs_n-m；

2) be averaged calculating by n measured value of same groove, is denoted as respectively:

AVERAGE(hs_1-1,hs_2-1,…hs_n-1)；

AVERAGE(hs_1-2,hs_2-2,…hs_n-2)；

…

AVERAGE(hs_1-m,hs_2-m,hs_n-m)；

3) measuring wearing away with toe shape of the identical position measurement pattern block of groove depth, and radially measuring k pattern block along tire successively, each pattern block radially takes j measurement point along tire, wherein k >=m+1, j >=3, is denoted as respectively:

D_1-1-1, D_1-1-2... D_1-1-j；D_1-2-1, D_1-2-2... D_1-2-j；... D_1-k-1, D_1-k-2... D_1-k-j；

D_2-1-1, D_2-1-2... D_2-1-j；D_2-2-1, D_2-2-2... D_2-2-j；... D_2-k-1, D_2-k-2... D_2-k-j；

…

D_n-1-1, D_n-1-2... D_n-1-j；D_n-2-1, D_n-2-2... D_n-2-j；... D_n-k-1, D_n-k-2... D_n-k-j；

4) taking the intermediate value that j the pattern block measuring point wears away with toe shape, be averaged calculating by the intermediate value with the abrasion of toe shape of adjacent lugs, is denoted as respectively:

AVERAGE(D_1-1-Me,D_1-2-Me,D_2-1-Me,D_2-2-Me,…D_n-1-Me,D_n-2-Me)；

AVERAGE(D_1-2-Me,D_1-3-Me,D_2-2-Me,D_2-3-Me,…D_n-2-Me,D_n-3-Me)；

…

AVERAGE(D_1-(k-1)-Me,D_1-k-Me,D_2-(k-1)-Me,D_2-k-Me,…D_n-(k-1)-Me,D_n-k-Me)；

5) by step 2) value of calculation deduct step 4) value of calculation, obtain each groove remove with toe shape abrasion impact after ditch depth value, be averaged calculate obtain first time measure decorative pattern ditch depth value hs₁；

6) the unit wear A of tire is calculated₁, formula is as follows:

$A_1=\frac{L_1}{H-{\mathrm{hs}}_1}$

Wherein L₁For the distance travelled that first time measures, H is new tyre ditch depth；

7) steps 1 are repeated based on different distance travelleds) to step 6), the unit wear of N-1 measurement after obtaining, wherein N is integer, is denoted as respectively: A₂, A₃... A_N；

8) be averaged calculating by the unit wear that n times are measured, and obtains mean unit abrasion A₀；

9) expectation mileage L is calculated₀, formula is as follows:

L₀=A₀*(H-h)

Wherein h is the tire wear indicator degree of depth。

2. mileage evaluation method estimated by tire according to claim 1, it is characterised in that step 1) in, the ditch depth of groove adopts depth indicator to measure, and during measurement, the cantilever of this depth indicator rides over the high point position of tested groove both sides pattern block。

3. mileage evaluation method estimated by tire according to claim 1, it is characterised in that step 3) in, measuring with the abrasion employing depth indicator of toe shape of pattern block, during measurement, the cantilever of this depth indicator rides over the high point position of front and back pattern block。

4. mileage evaluation method estimated by tire according to claim 1, it is characterised in that step 3) in, pattern block radially takes 3 and measures points along tire, respectively the middle part of the flex point of pattern block both sides and pattern block。