ncm 4 / 85
Front matter 1 Series NCM Air Cylinder Model Selection Step Obtain the bore of the cylinder tube. Refer to Graph (1) and (2). Determine the load factor in accordance with the purpose. Purpose of operation Static operation (Clamping, Low-speed vise crimping, etc.) Dynamic operation Horizontal movement of load on guide Vertical and horizontal movement of the load Load factor η 0.7 or less (70% or less) 1 or less (100% or less) 0.5 or less (50% or less) Take the impact at the stroke end into consideration. The aspects indicated below may need to be taken into consideration, depending on how the cylinder is operated. Obtain the cylinder’s air consumption and its required air volume. 1 Step 2 Step Step 3 4 Note) Note) If it is particularly necessary to operate at high speeds, the load rate must be reduced further. (In the graph, it is possible to select a load rate of 0.4, 0.3, 0.2 or less.) Note) If the same load is applied both for pushing and pulling in a horizontal operation, set the direction to the pulling side. Determine the operating pressure. Generally, set the regulator to 85% of the source air pressure. (In the graph, a selection between 0.2 MPa and 0.8 MPa is possible.) Determine the direction in which the cylinder force will be used. Extending side Refer to Graph (1). Retracting side Refer to Graph (2). When an external stopper (shock absorber, etc.) is provided to absorb the impact, select a stopper with sufficient absorption capacity. Stopping the piston with the cylinder without a stopper: Verify in Graph (3) to (4) the absorption capacity of the cushion that is enclosed in the cylinder. Bumper ・・・・・・・・・・・・・・・・・・・ Urethane rubber is used for preventing metal-tometal contact between the piston and the cover. If a lateral load is applied to the piston rod: Verify in Graph (5) whether the lateral load is within an allowable range. When using a cylinder with a relatively long stroke, if a buckling force acts on the piston rod or the cylinder tube, verify in the table whether the stroke or the operating pressure is within a safe range. Obtain the air consumption selecting a compressor and for calculating the running cost and the required (Graph (6) to (7)) that is necessary for selecting a compressor and for calculating the running cost and the required air volume (Graph (8)) that is necessary for selecting equipment such as an air filter or a regulator, or the size of the piping upstream.