RECOVERY METHOD OF CROSSWISE RIBBED TUBES AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2006 - IPC B23D21/04 B23D19/00 B26D1/14 

FIELD: processes and equipment for processing and recovering of previously used crosswise ribbed tubes.

SUBSTANCE: method comprises steps of feeding ribbed tube; embedding in tube disc cutters acting upon ribs in radial direction and rolling out tube by means of disc cutters in lengthwise direction; cutting ribs and separating them from tube due to tangential shifting by means of disc cutters at tube motion. Disc type wedge cutters are used; embedding depth of such cutters into ribbed tube corresponds to radial size of ribs. Apparatus for performing the method includes housing, mechanism for feeding ribbed tube and disc cutters mounted in shafts. Apparatus is provided with annular disc chuck mounted on housing and having following tracks and its rotation mechanism. Housing also includes pan for collecting pieces of cut ribs. Each disc cuter is wedge shaped one; it includes rotation drive and it is mounted in bearing assemblies in carriages equally spaced from disc chuck axis. Said carriages are arranged on housing in such a way that plane of apexes of cuter wedge passes through axis of disc chuck from which cutter is spaced by radius value of tube. Radial size of wedge of each cutter exceeds radial size of tube ribs in cross section. Feed mechanism may feed ribbed tube coaxially relative to disc chuck. Each carriage includes plate with boss for bearing assemblies of cutter shaft. Plate of each carriage includes opening for pin parallel to disc chuck axis and joined with housing; roller parallel to disc chuck axis and engaging with following tracks of disc chuck for moving shafts with cutters; member for locking carriage in housing. Said member includes several stoppers that pass through openings of carriage and groove of housing. Head of each stopper is secured to carriage. Nut with handles inserted into it is screwed onto threaded end of stopper. Inserts are mounted in grooves of housing; each insert has semi-cylinder surface for engaging with stopper and at opposite side threaded stop for locking carriage.

EFFECT: possibility for determining depth of cutting ribs, simplified process for recovery of ribbed tubes.

4 cl, 7 dwg