均匀性矫正机Uniformity rectifier

2019-6-11 17:30:26

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均匀性矫正机Uniformity rectifier

 

01

均匀性Uniformity

轮胎均匀性直接影响到车辆的乘坐舒适性和操纵稳定性以及轮胎的使用寿命,现代道路交通和汽车工业对轮胎均匀性的要求越来越高。优异的均匀性能赢得广阔的市场。

Tire uniformity has a direct impact on vehicle handling stability and driving safety. Modern road traffic and automobile industry have increasingly higher requirements on tire uniformity and excellent performance. Improvement on pass rate of the tire making has no doubt in bring more profits for the tire manufacturer.

 

轮胎均匀性试验指标包括径向力波动(RFV)、径向力偏差最高一次谐波(RFH1)、锥度(CONY) 、径向尺寸偏差RRO、侧向尺寸偏差(LRO)、TFV(滚动力偏差)、LFD(侧向力偏移)、角度效应(PLY)、胎侧不平BPS(Bumpy Side)  。

Tire uniformity test indicators include RFV(RADIAL FORCE VARIATION), RFV  1ST HAR., LFV(LATERAL FORCE VARIATION), RRO(Radial Run Out), LRO(Lateral Run Out), BPS(Bumpy Side).

 

一般均匀性试验控制4项指标a. RFV; b. LFV; c. CONY; d. CRRO。

In general, four indicators :RFV;  LFV; CONY; CRRO are need to be controlled well.

02

径向力偏差RFV

RFV(RADIAL FORCE VARIATION)径向力偏差:

对轮胎施加某一适当负载的状态下,轮胎中心与Loadwheel(负载轮)中心间距离保持一定而旋转时,随同所发生半径方向之力的变动大小,一般可得如图所示波形,将波形的最高处与最低处之差叫做RFV,单位是kgf。

When a certain appropriate load is applied to the tire, the distance between the center of the tire and the center of the loadwheel is kept constant, and when the force of the radial direction changes, the waveform is generally obtained as shown in the figure. The difference between the highest and lowest points is called RFV and the unit is kgf.

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RFV  1ST HAR.(RFV一次谐波的高点)

轮胎旋转一周时,径向力基谐波上的最高点,在轮胎上以红色圆点标出。

When the tire rotates one revolution, the highest point on the radial force-based harmonics is marked with red dots on the tire.

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03

RFV/RFV1变化产生原因分析Reasons for causing RFV/RFV1

 

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胎圈偏心及轮胎应力集中对轮胎品质造成很大影响

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04

解决方案Solution-均匀性矫正机Uniformity rectifier

当轮胎均匀性检测不合格时,在传统的的技术下,通过打磨胎肩,局部加温等降低RFV和RFV1H值。其缺点是会造成轮胎外观损伤,降低轮胎品质,影响轮胎销售。

When the tire uniformity test fails, under the traditional technology,The current simillar machine reducing RFV and RFV1H value by polishing tire shoulder and local heating would cause damage to tire appearance, reduce tire quality and affect tire sales.

全新的解决方案-均匀性矫正机,避免了对轮胎外观及其他性能的影响,可以降低RFV和RFV1H值,提高轮胎均匀性,降低废品率。

a new solution - tire uniformity rectifier that avoids adverse effects on tire appearance and other performance, reduces RFV and RFV1H values, improving tire uniformity, and reducing rejection rate.

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经矫正后,可实现轮胎RFV和RFV1H值平均降低2.5~3.5kgf

After the rectification, the RFV and RFV1H values of tires can be reduced by 2.5~3.5kgf 

 

性能名称Item

指  标Parameters

轮胎规格 Tire specifications

16〞—24〞(规格定制)

轮胎外径Outer diameter

500mm≤D≤1300mm

断面宽度Section width

140mm≤B≤400mm

每次轮胎数量 QTY of tire loading

Max.4条(规格定制)

设备尺寸Dimension

L4000*W1700*H2350

重量Weight

2T

 

05

设备亮点Eqiupment Highlights

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◆Zero damage to tires: There is no side-effect on appearance and internal parts.

◆Reduced RFV and RFV1H - has no effect on other values

◆Fully automatic rectification: 10 machines could be operated by only one operator.

◆Reduce Planned production and inventory

◆Reduce in the number of rejects 

◆Small area occupied and independent control

◆High ROI (return on investment): Only 6 months are needed for Cost-recovering

06

工作原理Working principle

通过对轮胎子口进行拉伸加压、定时加温,提高两边胎圈同心度,消除应力集中,实现对轮胎胎圈的矫正,降低RFV和RFV1H值。

Get the tire bead rectified to a proper concentricity and reduce the RFV and RFV1H values by stretching and pressurizing the tire bead and by heating it regularly

 

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通过矫正前与矫正后波形图对比可以看出,矫正前后波形变化小,振幅变化大。

By comparing the waveforms before and after correction, it can be seen that the waveform shape changes little and the amplitude changes obiviously.

07

实验数据Experimental data

01

A轮胎   205/55R16

 

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上述数据单位为:kgf,30条轮胎RFV1H值平均变化量为3.57kgf。

The average change of RFV1H value  for 30 pieces of tire is 3.57kgf.

02

 195/60R16

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上述数据单位为:N(牛顿),36条轮胎径向力RFV值平均变化量为3.43kgf。

The average change of radial force RFV value  for 36 pieces of tire is 3.43kgf.

03

C轮胎   225/60R18

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轮胎径向力RFV值平均变化量为2.5kgf, RFV1H值平均变化量为4kgf

The average change of radial force RFV value is 2.5kgf;

The average change of RFV1 value is 4kgf.

 

通过对轮胎矫正前后RFV、RFV1H检测值做正态分布图

Normal Quantie Plot for value of RFV、RFV1H after and before the rectification.

 

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经矫正后,可实现轮胎RFV和RFV1H值平均降低2.5~3.5kgf 

After the rectification, the RFV and RFV1H values of tires can be reduced by 2.5~3.5kgf.

08

对轮胎矫正前后各项检查数据显示Test data shows

1、经过多次实验检测,矫正对轮胎LFV、LFV1H、CONY、动平衡等无明显影响。

After many experiments and tests, the rectification has no significant effect on tire LFV, LFV1H CONY dynamic balance and so on.

2、根据脱圈、强度、水压爆破、耐久、低气压、高速试验情况,轮胎矫正前后的试验结果基本一致。

According to the bead tripping, strength, hydraulic blasting, durability, low pressure, high speed test, tire performances before and after rectificion are basically the same

3、矫正后的RFV、RFV1H检测值均没有回弹现象,矫正后的RFV、RFV1H检测值能保持稳定状态。

The measured values of RFV and RFV1H after correction do not rebound and can maintain a stable state.

4、矫正后对轮胎胎圈外观进行检查均未出现损坏及其他异常情况。

There is no side-effect on tire ppearance and internal parts.