| 摘要 |
FIELD: mechanics. ^ SUBSTANCE: prior to bending flat plates are carbide tempered at temperature corresponding to a steel grade within the range of 710-750 deg C during 1-2 hours with the following quick cooling. Bending is performed with the implementation of a cold shaping method in a device designed to provide stability of a setting angle and diameter of a helical line along the whole length of the plate in any of its cross-sections. Device for cold shaping represents set of disks, rotating freely on telescopic shaft, on its ends the shaft is equipped with swinging brackets for plate fastening. Each disk of the set has slot. At that the slots in discs are of preset shape and size to provide a fixation of an angle, pitch and diameter of a helical line in any cross section. ^ EFFECT: to upgrade quality due to improvement of cutting characteristics. ^ 2 cl, 4 dwg, 1 tbl |
