DEVICE FOR CUTTING HELICAL GROOVES ON PART INNER SURFACE Russian patent published in 2024 - IPC B23D11/00 

FIELD: machine building.

SUBSTANCE: device for cutting helical grooves on the inner surface of the part comprises a support conjugated with a plank, which has half-open slots, note here that said plank is connected with cutter holder with adjusting screws. Tracer is connected to the cutter holder, wherein between the tracer and the cutter holder there are spacers, and comprises a tracer roller, which consists of an axis located in a stepped bushing, needle rollers, note here that said axle has groove to accommodate ring while plate coupled with the tracer surface is arranged on its neck between ring and collar, and a stopper conjugated with the tracer surface is also arranged on the collar surface. Staples have a U-shape and a clamping bolt, wherein their ends follow the shape of the half-open slots. Rotary support platform consists of a flange and a mandrel, wherein the flange has recesses in which a bearing is located, and the mandrel is made in the form of a cylinder with one end surface, which is conjugated with axis installed in bearings, and on side surface contains fixing screws. Mandrel is connected with shell via washer and rod. Shell on outer side surface comprises helical groove with width equal to diameter of end of axis of tracer roller.

EFFECT: high accuracy of cutting a helical groove on the surface of the part, reliable fixation of the part to be machined in the shell of the device.

1 cl, 7 dwg