To provide a separation tool longer to use with less abrasion, high in shape precision of a material product and capable of restraining material loss to the minimum.
This separation tool to continuously separate individual members equal to each other from a rotating symmetrical work without producing chips is made of a base body, this base body has a chamfering part in an end part region on the entering side and a correcting section in an end part on the advancing side, a cutting screw thread formed in a helical line shape and height of the screw thread of which rises is arranged between them, and this cutting screw thread has an entering section and a main section formed roughly cylindrical which continues from it. A separation section TA is arranged between the main section HA and the correcting section KA, lead angles α are different for each of the sections EA, HA, TA, KA, the load angles α are prescribed by combination of width 6 of the screw thread 3 and the interval 7 (width of thread groove) of the two screw threads adjacent to each other of the cutting screw thread, and increase of the height 4 of the screw thread 3 is in size depending on the lead angles.
| JP2019042892 | CUTTING DEVICE |
SCHLEGEL JOACHIM
FOERSTER WILFRIED
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