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High assembly LH linear guide series

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Table stable t-win series linear guide rails and sliders are mainly square rails. The sliders are divided into square and flange type. All sizes and models are complete. Technical support is available. TSB series linear slider to obtain a number of product R & D patents, product quality assurance, widely used, cost-effective.

The conventional model of square rail has 15 / 20 / 25 / 30 / 35 / 45 / 55mm series, and the length is cut or butted according to the demand. At present, our company has developed the steel belt series linear guide rail, which has higher dustproof performance, lower noise, smaller friction coefficient and longer service life.

Linear guide rail assembly: generally, each guide rail is equipped with two sliders, sometimes one guide rail can also be equipped with multiple sliders, according to the drawing requirements.

Four row ball high rigidity uniform load design:

Table stability t-win series linear guide sliders adopt the design of four rows of balls to form a 4.45 degree angle contact between the sliders and the sliders, which can balance and offset the forces from the sliders in all directions. Regardless of the angle device of the sliders, the load capacity in all directions is equal. It is widely used in various mechanical manufacturing transmission parts. Compared with the Gothic two row groove design, four rows of balls are in high rigidity . the accuracy and service life have greater advantages. At present, it is widely used in the manufacturing of printing machine, robot arm, electronic equipment, semiconductor equipment, automation equipment, woodworking machinery and other equipment. Even if there is a large deviation or a combination of errors in the assembly track datum, it can be eliminated by the system itself, so that a fast and precise linear motion can be obtained.

Advantages: 1. Fast movement speed, light and fast.

2. Low friction resistance, low friction coefficient and low sound.

3. The rated load is large, the stress is uniform, and the overall load is large.

4. The product has high stability and can tell smooth movement.

5. It is easy to install, we have well assembled and debugged, it can be directly installed on the base, and the operation is simple.

6. The dust-proof design of sliding block can be used for one or two layers of dust-proof, with good dust-proof effect and long service life.

TSMC t-win is a manufacturer of independent R & D and production of linear guide rail and gear rack. It has a factory and R & D base in Taiwan. In order to better serve customers, TSMC t-win will build a factory in Shandong in 2018. In 2016 and 2019, it won patents for linear slide rail and linear guide rail, etc. for many years, stable t-win, which focuses on the field of precision drive positioning motion, has accumulated a lot of experience and is capable of solving various problems of precision drive positioning. TSMC t-win advocates the market awareness of "service-oriented, user first", the business philosophy of "honesty and trustworthiness, one promise, one thousand gold", adheres to the work style of "teamwork, diligence and pragmatism" to build a professional production and marketing integration team, and the products win the praise of customers with excellent quality and high-quality service.

Product parameters of t-win series high assembly linear guide rail of table stabilizer:

1、 Accuracy class

The accuracy is divided into four levels: ordinary level, advanced level, precision level and ultra precision level

说明

精度等级μm

SP

P

H

C

组合高度HW2

±10

±20

±30

±100

同一导轨的各个滑块上,HW2的最大偏差

4

7

15

30

滑块相对于导轨的行走平行度P

二.Contact structure

Four row arc contact

1. Under the action of preload, the ball contacts at two points in the direction of load. Because the micro slip is very small, the ball can move smoothly.

2. Since the radius of curvature of the guide rail is 52-53%, it can bear large rated load.

3. Because of the sufficient preload, the four column arc contact structure provides a strong rigidity.

4. This kind of circular arc contact has the property of adjusting the center, which can ensure the accuracy and rigidity of the ball when the ball has elastic deformation, and obtain smooth movement.

三.Pretightening

The amount of movement of the slider caused by the external impact is called the clearance. In order to reduce the gap, it must be controlled according to the table below.

Light preloading C1 = 0.02c, medium preloading C2 = 0.08C.

In order to obtain the required clearance, the preload should not exceed three times the load.

预压等级

   使用条件

  应用举例

无预压C0

载荷方向固定冲击振动小,刚性要求不很高,运动阻力小的场合。

梁氏焊机,装订机,自动包装机,一般机械的X轴和Y轴,自动底盘加工机,焊接设备,热切割机,换刀装置,多种供料设备。

轻预压C1

轻载,运动阻力小,但刚度要求高的场合。有附加扭矩载荷或斜向载荷的场合。

磨床工作台移动轴,自动包装机,工业机器人,高速供料设备,NC钻削机械,一般工业机械的Z轴,打印机,穿孔机,漂染处理机,精密X,Y工作台

中预压C2

有振动与冲击,需要高强度,大功率的场合。重切削的加工机床。

加工中心,NC料架,低速输送轴,钻镗机床的主轴导向部分、加工机床的Z轴。

不同预压导轨间隙

单位:μm

规格

无预压C0

轻预压C1

中预压C2

15

±4

-12 ~ -4

-20 ~ -12

20

±5

-14 ~ -5

-23 ~ -14

25

±6

-16 ~ -6

-26 ~ -16

30

±7

-19 ~ -7

-31 ~ -19

35

±8

-22 ~ -8

-35 ~ -22

45

±10

-25 ~ -10

-40 ~ -25

四.Deviation and friction coefficient

The increase of the parallelism deviation between the two guide rails will increase the rolling resistance of the slider and affect its service performance and life. During installation, the parallelism shall be controlled within the allowable deviation without any impact.

规格

平行度许用偏差(μm/m)

无预压C0

轻预压C1

中预压C2

15

25

18

10

20

25

20

18

25

30

22

20

30

40

30

27

35

50

35

30

45

60

40

35

Allowable deviation of deviation distance between two guide railsS1

S1=a x Y

a:两导轨之间的距离     Y:偏移系数

偏移系数

无预压C0

轻预压C1

中预压C2

Y

0.0004

0.00026

0.00017

Friction resistance depends on load, preload, speed and lubrication. In general, the friction resistance depends on the lubrication characteristics at high speed under light load, while it depends on the load at medium load, heavy load and low speed.

F=μP+f

F:摩擦阻力  μ:摩擦系数  P:工作负荷  f:密封阻力

When there is a seal, the friction resistance must be added to the seal resistance. Because of the different contact area, pressure and lubrication conditions, the seal resistance is variable.

四.load

(1) In the static or moving state, the linear motion system often bears too much load, or has a large impact load, so that the surface of the guide rail and the rolling body, local permanent deformation. If the permanent deformation exceeds a certain limit, it will hinder the stability of the linear motion system.

In general, the basic static rated load is taken as the limit of allowable static load.

The so-called basic static rated load is the limit of allowable static load. The following method is used to determine the static load when the permanent deformation sum of the rolling body and the guide rail surface is exactly one thousandth of the rolling body diameter at the contact part with the maximum capacity, which is the basic static rated load.

According to different service conditions, the following static safety factors shall be considered for the calculation of load. Especially for the linear mechanism of reciprocating motion, when it starts or stops, it often causes unexpected excessive load due to the inertial force of moving objects, which we hope to pay attention to.

(2) The static rated moment is defined in three directions of MR, MP and my in linear slide motion:

(3) When the linear slide is used in the case of slow motion or low action frequency, the static safety factor should be considered. According to different use conditions, different safety factors must be taken into account when calculating static load, especially when the slide rail is under large load.

运动条件

负荷条件

fs的下限

静止状态

冲击力和轴的弯曲度都小时

1.0-1.3

有冲击 扭转负荷作用时

2.0-3.0

正常运动时

普通负荷,轴的弯曲度亦小时

1.0-1.5

有冲击,扭转负荷作用时

2.5-5.0

fs:静安全系数      C0:基本静额定负荷      p0:静负荷,冲击负荷

五.life

1. Life of linear motion system

When the linear motion system bears the load and does rolling motion, the surface and rolling part (steel ball) of the guide rail will be continuously affected by the circulation ability. Once the critical value is reached, the rolling surface will produce fatigue damage, and some parts of the surface will produce scale like peeling. This phenomenon is called surface peeling.

The so-called life of linear motion system refers to the total travel distance when the surface of guide rail or rolling part peels off due to rolling fatigue of materials.

The life of linear motion system is very dispersive. Even if the products manufactured in the same batch are used under the same operating conditions, there will be a big gap in life. Therefore, in order to determine the life of linear motion system, the rated life is generally used.

The so-called rated life is defined as follows. That is to say, let a batch of the same linear motion systems move one by one under the same conditions, 90% of which is the whole distance without peeling.

2. Basic dynamic rated load C and service life

The basic dynamic rated load C is used for the life calculation when the linear motion system bears the load and does rolling motion.

The so-called basic dynamic rated load is a load with constant direction and size. When a batch of the same linear motion systems move one by one, the linear motion system of steel balls is used, and its rated life is L = 50km.

3. Calculation of life

3.1 calculation of rated life

L=

50: Rated life unit: km

C: Basic dynamic load rating in kn

P: The unit of load when the system is actually working is kn

3.2 life calculation considering service conditions:

The load of linear motion system is almost difficult to calculate. In particular, there are many cases of vibration or impact in motion, and it is not simple to calculate the load distributed in each linear system. Moreover, the hardness of the guide surface and the temperature inside the linear motion system also have a great influence on the service life.

If the above conditions are taken into account, the calculation formula of formula (1) is as follows.

L=

L:Rated life unit iskm   C:Basic rated dynamic load unit isKN   PC:Calculated load unit isKN

fH: Hardness coefficient    fT: temperature coefficient    fC: Contact coefficient     fW:Load factor

3.3Time to calculate life

The life time of the linear motion system is calculated according to the walking distance within the basic time. When the length of the stroke and the number of reciprocations are equal, calculate according to the following formula.

Lh=

Lh:Life time(hr)     L:Rated life(km)  

I:Length of travel (m)    n:Number of reciprocations per minute (opm

4、Factors affecting life

4.1Hardness coefficient:fH

In order to give full play to the performance of the linear motion system, the surface of the guide rail in contact with the steel ball and the hardness from the surface plane to the appropriate depth shall be hrc58-64. If the required hardness cannot be achieved for some reason, the service life will be shortened and the allowable load will be reduced under the condition of such low hardness. Therefore, the basic rated dynamic load C and the basic rated static load shall be multiplied by the hardness coefficient FH in the calculation.

4.2temperature coefficient:ft

When the temperature of the linear motion system exceeds 100 ℃, the hardness of the surface of the guide rail will decrease. Compared with that used at normal temperature, the service life will be shortened, and the allowable load will be reduced. In this case, the basic rated dynamic load and the basic rated static load shall be multiplied by the temperature coefficient

4.3Contact coefficient:fC

When two or more sliders are used together, it is difficult to get consistent load distribution due to assembly error. The basic dynamic load rating and the basic static load rating are multiplied by the contact coefficientfc

Number of sliders assembled on the same rail

Contact coefficientfc

1

1

2

0.81

3

0.72

4

0.66

5

0.61

4.4Load factorfw

P=fw x Pc

P:Load on slider(kgf)  fw:Load factor  Pc:load

Shock and vibration

cShock and vibration

Vibration measurement value

Load factorfw

No external shock and vibration

low speed

V15m/min

G0.5

1~1.5

No external shock and vibration

Medium speed

15V60m/min

0.5G1.0

1.5~2.0

With external shock and vibration

high speed

V60m/min

1.0G2.0

2.0~3.5

Inertia force load:

The load acting on the linear motion system varies according to different conditions. Different stress conditions must be considered when calculating the life of the linear motion system

Stepped variable load

Pm=

Pm:Average load(KN

Pn:Variable load(KN

L:Total moving distance(m

Ln:The load PN is the moving distance

Pmin:Minimum load(KN

Pmax:Maximum load(KN

Sinusoidal load

 Pm=0.65Pmax            Pm=0.75Pmax

Basic static rated load

If the linear moving system is overloaded in static or motion, the rolling unit guide rail will produce local permanent deformation, and the linear moving system will not run smoothly when the deformation is too large. When the rolling element contacts the guide rail with the maximum pressure, the basic static rated load is defined as the load acting in a direction with constant size. Under this load, the total permanent deformation of the rolling element and the guide rail is equal to 0.0001 times of the diameter of the rolling element.

Static safety factor reference value:

Operating conditions

Load case

fs

Normal stillness

Small impact load or shaft deformation

1.0~1.3

Impact or torsional load

2.0~3.0

Normal exercise

Normal applied load or small shaft deformation

1.0~1.5

Impact or torsional load

2.5~5.0

fs

fs:Static safety factor  Co:Basic static load rating  Po:Impact load

There are two ways to choose the guide rail, one is based on the static safety factor, the other is based on the life requirements, usually the latter method is used. Example:

condition:

loadW=10KN

tripLs=0.9m

Number of reciprocationsn1=5/min

Life requirements:7200h

If 4 sliding blocks are selected, the load of single sliding block is p = 10 / 4 = 2.5kn, and the single rail is equipped with two sliding blocks, thenfc=0.81

1)Select according to static safety factor

fs=5 ———————————— (Note: the safety factor is generally selected as5)

Co=5x2.5/0.81=15.43KN

It can be seen from the table that lhh20ca can be selected

2)Select according to life requirements

2 x Ls x n1 x 60 x Lh= L=

2x0.9x10-3x5x60x7200=x50

C=19.76KN So chooseLHH25CA(C=20.6KN)

3)More than 20 specifications can be selected according to the calculation, but lhh25ca is more ideal considering its service life

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