METHOD AND DEVICE FOR DRILLING A WORKPIECE IN AN ELASTICALLY STRESSED STATE. Russian patent published in 2022 - IPC B23B35/00 B23B43/00 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering and can be used for drilling holes. The workpiece is installed in a device with a conductor bushing. Subjected to elastic deformation by a load equal to the limit of proportionality of the workpiece material. Under the action of the hydraulic cylinder, the movable plate with the installed workpiece is brought together along the guides in the form of four columns to the fixed plate until the limit switches actuate. The drilling process is performed. After drilling, the force on the hydraulic cylinder is removed. The movable plate returns to its original position under the action of springs.

EFFECT: increases tool life.

2 cl, 3 dwg, 1 tbl, 1 ex