Threaded pipe processing considerations

　　Threaded pipe processing should also pay attention to the following contents:

　　（1） processing screw thread pipe fittings before check thread die quality, if it is found that the set screw die quality defects should be replaced in a timely manner, and shall not use of substandard quality of screw die processing thread.

　　（2） the general use of mechanical pipe cutting method, cutting nozzle should be positive and should be free of burrs, wall thickness should be uniform, no crack.

　　（3） the manual processing of pipe thread, should first choose the corresponding pipe specification to die, put people in no When machining threads. Pipe should be fixed on the bench, and the tube end extended shoulds not be too long, set the threaded plate braces in the pipe end should keep the heart line is concentric to the tube, the chuck of stuck pipe, to rotating sleeve screw die is appropriate. In the thread processing process, in order to prevent the thread and die friction caused by overheating, rotten teeth, to lubricate the thread. At the same time in order to save energy and prevent set screw die excessive wear and prevent thread is not smooth and the broken chains, short chain defects, die feed amount can not be too large.

　　（4） when using mechanical processing thread, in order to avoid damage to pull the tooth or rotten teeth should be conducted at low speed, feed amount each time can not be too large, should also be completed in 2 to 3 times the processing, and prevent the partial deduction, off button, in thread machining process, should also continue to gas cooling, should make the center of the head and the pipe center always maintain concentric.

　　（5） when the length of the processed thread is to meet the requirements. Loosening the die exit pipe. Pipe threads should be clean, smooth, regular, no partial deduction, broken button, missing buckle and other quality problems, and with the same specifications of the tube sets of test equipment, if the hand can be screwed into the length of the 1/3 that is qualified.