AMF Catalogue Hydraulic clamping systems Page 254
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LOW prEssurE suppOrt ELEmENts – tEcHnical inFormation OpEr atiNg prEssurE: to achieve a guaranteed clamping function, the min. operating pressure must not be fallen below. the highest clamping force is achieved at ma x. operating pressure. CONtaCt FOrCE: the spring-loaded contact force is at its greatest at a min. distance between the installation position and workpiece. shE ar FOrCEs: Support elements only absorb forces in a xial direction of the piston. if shear forces occur, the support element is damaged. the function of the support element can no longer be guaranteed. VOLumE FLOW: the permissible volume flow must not be exceeded. the permitted volume flow can be controlled with a throttle/check valve. if the volume flow is too high, the oil pressure increases so quickly that the anchor is clamped before it is on the workpiece. if several support elements are used, the permissible volume flow is the total of the individually permissible volume flows. EL astiC ChaNgE iN LENgth: just like any steel component, the support elements During heavy loading, a setting behaviour occurs. VENtiNg: Force (N) also have an elastic behaviour. Support elements only need a very small oil volume. Since the hydraulic oil in the connection line hardly moves, careful venting is necessary. air in the oil can prolong the clamping time considerably. if venting is not carried out properly, a diesel ef fect Displacement (mm) may occur and destroy the support element. always vent at low pressure. diEsEL EFFECt: if petroleum containing air bubbles is compressed very quickly, the bubbles will be heated so strongly that a self-ignition of the air/gas mixture could occur. as a result, a very high pressure and temperature increase occurs locally, which could also damage seals as well as cause accelerated ageing of the oil. spriNg spaCE VENtiL atiON: the free loading and venting of the spring spaces must be ensured. the pressure connection must be protected or arrayed properly so no coolant is taken in. Failure to observe this can lead to malfunctions. COOL aNt aNd shaViNgs: Support elements should normally be protected against shavings and cooling water. Subject to technical alterations. 254 Hydraulic clamping systems ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de
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