Розробка і дослідження зусилля затиску і крутного моменту безкамерного затискного патрона

Abstract

Various design patterns of chucks are analyzed, which are used to secure cutting tools (drills, mills) with cylindrical shanks during high-speed machining. An original compact design of a chuck with adjustable clamp-expanding force is proposed. At the same time, the clamp-expanding force of the shank and tool is provided not by supplying pressure to the working chambers of the chuck, but into the working chambers of the hydraulic cylinder (or pneumatic cylinder), which is not included in the structure of the chuck. The proposed chuck is characterized by increased torque, makes it impossible to slip the movable sleeve relative to the clamping during sharp acceleration and braking of the chuck. Analytical dependences are given that make it possible to calculate the clamping-expanding force during the design process of both chuck with and without an additional radial chamber. The use of an additional radial chamber makes it possible to significantly reduce the operating pressure of the supply while maintaining the specified force when clamping the shank of the cutting tool.