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HIWIN Linear Guideway Rated load

Published：2010.11.09 News Sources：Kepu.Inc Views：

HIWIN linear guide rated load
1 basic static rated load
(1) basic static rated load (C0) definition
Linear guide in the stationary or playing sports if bear excessive load, or suffer have very big impact load, will lead to contact and the steel beads way produce partial permanent deformation, When the permanent deformation amount exceeds a certain limit, it will interfere with linear guide sports steadiness. Basic static rated load is allowed the permanent deformation of the limit load. In accordance with the definition: load direction and size under the condition of invariable under the biggest stress surfaces in place, the steel surface with bead word total permanent deformation just for the steel diameter PPM static load.
Basic rated load of static numerical provide details in various sizes in the table, Users can consult to form, we choose the suitable of linear guide, but must pay attention to the selection of linear guide is in operation of the maximum static load by cannot exceed its basic static rated load.
(2) allow static torque (M0) definition
When the slider was the biggest stress of steel-ball achieve the above definition of static rated load occurs when the slider conveys the torque called static rated torque. In linear guide movement is MR, MP, PY it three directions to define
(3) static safety coefficient
When linear guide used in slow motion or actuator frequency is not high condition, need to consider the static safety coefficient. According to different conditions, the use of static load must consider different calculation of safety factor, especially when guide by the badly-impactive loads, need access to larger safety coefficient.
FSL = C0 / P or FSM = M0 / M
FSL: static safety coefficient
FSM: static safety coefficient (torque load)
C0: basic static rated load (kN)
M0: allow static torque (kN m.)
P: work load (kN)
M: static torque load (kN m.)
2. The basic dynamic rated load
(1) the basic dynamic rated load (C) definition
The basic dynamic rated load for linear guide bear a heavy load and rolling motion of lifetime calculation. Its definition is in load direction and size unchanged condition, linear guide rating of the life expectancy of the maximum load, 50km when the value provide details in various sizes in the table, users can borrow this value in advance estimate of linear guide rating of the choose life.
Linear guide life
1. Life
When linear guide bear a heavy load and motion, bead way surface and steel balls because is continually cyclic stress effect, a but reached rolling fatigue critical value, interface will begin to fatigue damage, and in some parts of the surface of spalling phenomena occur been chip, this phenomenon is called surface detachment. Life expectancy for bead word definition, surface and steel balls because of material fatigue surface stripping so total run when distance.
Rated life 2.
Linear guide life, has great dispersion, even with a batch of manufactured products, in the same state of motion using, life would differ, This mostly attributed to the materials themselves in fatigue properties on inherent changes. Therefore for defining linear guide life, general with rated life as a benchmark, Its definition is: with a batch of the same product, one in the same conditions and rated load operation, 90% of it never occurs to surface stripping phenomenon and to achieve the total run distance.
3. Lifetime calculation
Straight guide life expectancy because the actual work under load and different, can choose the basic dynamic linear guide-orbit rated load and work load calculate the using life.
4. Life coefficient
(1) hardness coefficient (comparison)
Straight guide bead way contact surface hardness requirement in certain depth of hardness of sclerosis of HRC58-62, if hardness value cannot reach request level, will reduce linear guide rated load and service life, when dynamic and static rated load for size table column value multiplied again with the corresponding hardness coefficient.
HIWIN appearances of the linear guide hardness requirement is HRC58 above, so comparison of 1
(2) temperature coefficient (ft)
System of linear guide temperatures will have influence on the material, when the temperature higher than 100 ° C when linear guide rated load and use life will decrease, dynamic and static rated load at this time for size table column value multiplied again with the corresponding temperature coefficient. Due to some accessories plastic material is less high temperature resistant, reason suggests using temperature should be less than 100 ° C.
(3) the load factor (fw)
In the role of linear guide load, except the device itself self-reverence, starting to stop when the inertia and generated by the torque due to mount load outside, still as sport with vibration and impact load, this type of load is not easy to calculate, according to experience in load conditions and the use of speed, the proposal will be calculated load value multiplied again with the corresponding load coefficient.
HIWIN linear guide sales services, information hotline is: 400-811-5568
Employed by HG/EG series
Load conditions using speed fw
No impact and smooth V acuities 15m/min 1 ~ 120
Tiny wallop 15m/min < V acuities 1.2 ~ 1.5 60m/min
Ordinary load 60m/min < V force of more than 120m/min 1.5 ~ 2.0
By impact and vibration V > 120m/min 2.0 to 3.5
MG series
Load conditions using speed fw
No impact and smooth V acuities 15m/min 1 ~ 1.5
Ordinary load force 15m/min < V 60m/min more than 1.5 to 2.0
By impact and vibration V > 60m/min 2.0 to 3.5

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