DEVICE FOR SELECTIVE GRINDING AND TESTING OF SOLID FRIABLE MATERIALS Russian patent published in 2003 - IPC

FIELD: machine tool industry; devices for treatment of crystals of superhard materials. SUBSTANCE: device has working chamber with changeable shield, loading unit and pneumatic system; loading unit makes it possible to deliver diamond crystals one by one to transporting system. Changeable shield is made in form of stepped cone for forming tangential stresses in each crystal of diamond; structural parameters of stepped taper shield are selected from the following condition: (d-d₁)/2 = 1/2 and b>l₁, where d and d₁ are diameters of two adjacent steps of shield, mm; b is height of one of steps, mm; l is average diameter of diamond crystals being treated, mm; l₁ is maximum size of grains of main fraction of powder, mm. EFFECT: enhanced strength of diamond crystals; improved technological parameters. 1 dwg