
High assembly LH linear guide series
Collect
Table stable twin 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, costeffective. 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 twin 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 dustproof design of sliding block can be used for one or two layers of dustproof, with good dustproof effect and long service life. TSMC twin 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 twin 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 twin, 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 twin advocates the market awareness of "serviceoriented, 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 highquality service. Product parameters of twin 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
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 5253%, 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.
不同预压导轨间隙 单位：μm
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.
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
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 socalled 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.
f_{s}:静安全系数 C_{0}:基本静额定负荷 p_{0}: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 socalled 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 socalled 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 socalled 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 P_{C}:Calculated load unit isKN f_{H}: Hardness coefficient f_{T}: temperature coefficient f_{C}: Contact coefficient f_{W}: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 hrc5864. 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：f_{C} 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。
4.4Load factorfw P=fw x Pc P:Load on slider（kgf） fw:Load factor Pc:load
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：
≥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^{3}x5x60x7200=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。 