Elbow

Stamping elbow is applied at the corner pipe fittings, in actual use, is widely used, often in construction, machinery, chemicals, electric power, shipbuilding and other industries applications, elbow angle can be divided by 45 °, 90 °, 180 ° in three forms; short radius can be divided by the radius, long radius; elbow on different materials need to select a different process. Stamping elbow commonly used process of cold extrusion, stamping and hot push. Since stamping flexibility and toughness is better, so stamping materials of the elbow shaped in a manner common cold extrusion, the next good material into a mold rough elbows, after closing the upper and lower mold, Hydraulic pipe fittings Hydraulic pipe fittingsin effect, punching Elbow blank space inside the mold movement along the complete shape. Use mold cold process production of stainless steel elbow with a smooth surface, high dimensional accuracy, small error. For the use of cold forming, the shape should be carried out after forming heat treatment for stress relief. Stamping elbow visual inspection should be carried out piece by piece, and should meet the relevant standards, punching elbow surfaces should be smooth without scale, the elbow must not depth greater than 5% of the nominal wall thickness, and the maximum depth of not more than 0.8mm folded, rolled off, separation and other defects. Hydraulic hose fittings Hydraulic hose fittings surface depths exceeding 12% of the nominal wall thickness of 1.6mm or greater mechanical scratches and pits should be removed, for carbon steel and austenitic stainless steel stamping elbow, each batch should be drawn and not less than 3% 2 do hardness test, the results are subject to a failure, should be doubled tested, if there is still a failure, should be individually examined. Steel elbow for hardness testing should be carried out piece by piece. Low temperature steel elbows, low temperature impact test must be done, the same batch of test pieces should select the base metal, and are willing to have the same end with the elbow heat-treated condition. Stamping elbow bend at the surface before painting should be thoroughly cleaned until visible metal color and flash, burrs, oil, etc. to eliminate Clean; rust film should be uniform, no bubbles, wrinkles and peeling; according to the different materials are packed, and moisture measure.