METHOD FOR CUTTING A FIBER-REINFORCED COMPOSITE WORKPIECE WITH AN ADVANCED ACTION OF A LIQUID JET AND A PREFABRICATED BLADE TOOL FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC B23B1/00 

FIELD: materials processing.

SUBSTANCE: inventions group relates to the processing of materials by cutting, namely to the processing of blanks made of fiber-reinforced composite materials with a blade tool, which is realized with the formation of chips. The method includes cutting with an assembly blade tool with a first jet of coolant. At the beginning of the cutting process, at a distance of ₁ from the tip of the cutting blade, a second stream of coolant under pressure is fed at an acute angle α to the workpiece surface to be processed, which pre-deforms the cut layer and thereby creates a supporting force that prevents the bending of the cut fibers of the composite workpiece in the opposite direction to the vector main cutting motion D_r, at the same time, the depth of peeling of such fibers from the matrix δ is minimized. The assembled blade tool in the form of a continuous cutter with a combined supply of liquid jets comprises a housing with a multifaceted cutting blade installed on the base plate with a cutting blade, to which the first jet of cooling liquid is supplied through a supply nozzle through a common channel installed in the housing. In this case, an additional supply of a second jet of coolant under pressure, located at an acute angle α to the processed surface of the workpiece, located at a distance of ₁ from the tip of the cutting blade, is made through the common channel through the nozzle fixed in the nozzle. At the same time, adjusting screws for separate adjustment of the pressure of the jets of the first and second kind are installed on both nozzles.

EFFECT: improving the quality of the processed surfaces of parts by reducing the separation of their fibers from the matrix, which occurs when these fibers are bent from the impact on them of the tool blade moving along the velocity vector of the main cutting motion.

2 cl, 2 dwg