During the production of square and rectangular tubes, the feeding accuracy directly affects the accuracy and quality of the formed products. Today we will introduce seven factors that affect the feeding accuracy of rectangular tube:
（1） The center line of the feeding device and the center line of the stamping machine must be set on the same line. If it is not in a straight line, when the uncoiled material is sent to the mold, it is inclined relative to the mold. The material guidance inside the mold and the side guidance of the feeding device will have great resistance, which will greatly reduce the accuracy of feeding.
（2）