METHOD FOR MANUFACTURING HOLES WITH A GIVEN EFFECTIVE AREA Russian patent published in 2023 - IPC B24C1/04 B24C5/02 B24C3/16 B24C7/00 

FIELD: manufacture of holes.

SUBSTANCE: invention relates to the manufacture of holes with a given effective area. An air supply line is used in front of the hole being processed, in which a master jet, an abrasive dispenser and a vortex chamber are installed in series. The pressure ratio in front of the driving jet and in front of the hole being processed is measured. The hole is processed by supplying air with abrasive through a vortex chamber into the hole being processed in the product. Air is supplied at constant pressure through a supply jet with active control of the specified effective area of the hole being processed μ₂F₂, determined by the formula:

Where μ₁,μ₂ – flow coefficients; F₁ – area of the driving jet opening; F₂ – area of the hole being machined; P₁ – absolute air pressure at the inlet to the supply jet; P₂ – absolute air pressure at the inlet to the hole being processed.

EFFECT: holes with an effective area are obtained while ensuring control of its size during the manufacturing process.

1 cl, 1 dwg