U Bender Cleaning Machine is used to deal with kinds of small elbows at φ9.52 to7φ in heat exchanger. It can remove burring of massive elbows and clean them and make them dry at one time.    The operation principle of the machine refer to "OAK" machine, use stainless steel ball as abrasive, through vibrating and grinding get rid of burrs and wash, the clean minor elbow enter into vibrating chute in queue with two feet towards down. Drying by heat wind, separate grinding steel ball. For the storing chute position of "OAK" machine is on the high side, the strength is not enough, move the storing chute to low position, and match with elevating machine, feed the work piece into grinding machine with timing.