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Brief description of process procedures of end cropper:

After cutting, steel pipes are transported by conveyor roller table to stopping device for buffering. Then proximity switch under conveyor roller table issues signal and air cylinder transfers steel pipes onto loading rack for separating. Steel pipes are separated (by separating air cylinder and movable stop plate air cylinder) two by two and put onto line-up roller table for lining up at one end by air cylinder. Before lining up, slide bar of repositioning device on the end cropper moves into position (by hydraulic cylinder), proximity switch signals the clamping hydraulic cylinder to clamp the pipe tightly until signaling position. Then the repositioning slide bar resets and issues a signal. The milling head will feed quickly into position and press the combination switch to issue signal for work feeding. After completing work feeding, the milling head will reside for 0.5s before issuing signal for quick retreating. After milling head returning to initial position, a signal is issued to release the clamp (two separating cycle shall be finished within time period of work feeding and quick retreating, i.e. steel pipes have been put onto line-up roller table and lined up). Stepping machine is then signaled to start pipe loading and unloading at same time. When unloading the first steel pipe, movable stop plate of unloading rack is in pulled down position. After the first steel pipe is unloaded, Steel pipes slide of unloading rack raises to stop the second steel pipe. After 5 seconds (adjustable according to cut-to-length), movable stop plate pulls down to allow the second steel pipe to drop onto discharge roller table to repeat above operation. One cycle will last 30~20 seconds. For testing, the cycle time can be set to 30 seconds to crop two pipes in one cycle. This machine works in conjunction with flying saw. Pipes cut off by flying saw shall not have too many burrs. The end cropper can only mill one end face each time. Two work stations are provided to crop left and right end faces respectively.