The guide rail and bearing structure of three coordinates

Gas floating guide 1. The role of the guide rail, is the key to ensure smooth machine, high precision motion. 2. Guide rail type: 1) Gas floating guide rail (2) Linear ball guide 3. Gas floating guide practice: 1) Rectangular guide rail (2) Triangle rail (3) Dovetail type guide 1. Gas float guiding principle: gas floating guide rail is the center of air bearing. Application of air bearing holes r1 throttling form high pressure P0, gas cavity between the guide rail and air bearing structure has a certain bearing ability and rigid film h. 2. The performance of the air bearing has request: bearing ability, bearing rigidity ( Air bearing clearance every change bearing to the change of a micron) Vibration, gas consumption, air resistance ability. For high precision measurement machine, air bearing clearance and the stability of the gas chamber pressure is very important. Advantages of air-float guide: without friction and wear characteristics, due to uniformly bad effect, the movement of straightness and swing Angle can be small, high precision of measurement machine adopts gas float in general. Linear ball guide 1. USES the advantages of linear ball guide: save a full set of austerity air equipment and pneumatic control components, capital is low, suitable for the application without air environment; Good rigidity, bearing ability is strong; Than a simple ball bearing, is influenced by individual ball defects and have bad effect 2. Adopts linear ball guide rail defects: as the steel ball and guide rail, the structure of slightly lower precision measurement machine, the friction is bigger; Find another is its device, adjusting effect on the performance of the whole machine is larger.