A rotary cutting tool according to the present disclosure is rotatable about an axial line and includes a rake face and a flank face. The flank face is contiguous to the rake face. A ridgeline between the rake face and the flank face constitutes a cutting edge. In a cross section perpendicular to the axial line, the rake face is constituted of a plurality of straight line portions.

A cutting insert is provided, comprising a top surface, a bottom surface, and side surfaces spanning therebetween, the side surfaces comprising one or more feed-facing side surfaces and one or more radial-facing side surfaces. The top surface is formed with one or more linear grooves, each constituting a chip breaker and being disposed parallel to and adjacent one of the feed-facing side surfaces. The chip breaker is characterized by a constant profile along the entire length of its respective feed-facing surface. Each of the feed-facing side surfaces is disposed at an acute feed-angle with respect to the top surface, and each of the radial-facing side surfaces being disposed at an acute radial-angle with respect to the top surface, the feed-angle being greater than the radial-angle.

The present invention relates to a tool (10) for machining a workpiece, comprising a cutting head (12) which comprises a sleeve (16) and a cutting element (18) which is fixed to the sleeve (16), and comprising a holder (14) to which the cutting head (12) can be detachably fixed. In an assembled state of the tool (10), the cutting head (12) and holder (14) are screwed to each other via an internal thread (40) which is arranged in the sleeve (16) and an external thread (42) which corresponds thereto and which is arranged on the holder (14). In addition, in the assembled state of the tool (10), the cutting head (12) and holder (14) contact each other along a first axial bearing surface (36) which is arranged on the sleeve (16) and a second axial bearing surface (38) which corresponds thereto and which is arranged on the holder (14), and along a first conical bearing surface (44) which is arranged on the sleeve (16) and a second conical bearing surface (46) which corresponds thereto and which is arranged on the holder (14).

An intelligent switching system for switching internal cooling and external cooling and a method are provided. The system includes a vision system, a cooling system and a control system. The vision system monitors a real-time milling state of a cutter, collects a real-time milling depth image that the cutter mills a workpiece, and transmits the collected real-time milling depth image to the control system. The control system includes a lubrication mode control center, and a motor control center. The lubrication mode control center receives the real-time image transmitted by the image collection control center; analyzes and processes the real-time image to obtain real-time milling depth data of the cutter. The motor control center receives a signal sent by the lubrication mode control center; analyzes and processes the signal, and transmits a control instruction to the cooling system. The cooling system executes a switching command issued by the control system.

A milling cutter includes a front end part and a back end part. The front end part includes a disc-shaped cutter body having a front side, a rear side, a central axis, and a number of insert seats. A primary holding member extends from the rear side. The back end part includes a secondary holding member, which engages the primary holding member when the front and back end parts are mounted to each other. The disc-shaped cutter body has a central cylindrical aperture extending coaxially with the central axis and including an inner cylindrical surface. An outer cylindrical surface is provided on a front portion of the secondary holding member. The inner cylindrical surface abuts the outer cylindrical surface in an abutting region between the front and the rear sides to center the front and back end parts.

An object of the present invention is to provide a cutting tool that requires the smaller number of parts and can be manufactured at a lower cost. A cutting tool includes: a tool body extending along a central axis and rotatable around the central axis; a cutting insert to be mounted on an insert mounting seat of the tool body; and at least one flow passage provided inside the tool body, the at least one flow passage extending from a back end side toward a front end side of the tool body so as to supply a coolant toward at least a part of the inside of the tool body, a back end side of the at least one flow passage being open at a portion sealed by the tool body and the holding member when the holding member is coupled.

A rotary cutting method includes producing a processed product by rotary cutting of a workpiece by a rotary tool. The rotary tool has at least one cutting edge of which both of a first rake angle in a rotation radial direction and a second rake angle in a rotation axis direction are negative. The at least one cutting edge has a slanted face connected with a rake face forming the first and second rake angles. The slanted face is connected with the rake face at a ridge line. The slanted face faces a rotating direction of the rotary tool. An angle of the slanted face to the rotation axis direction is positive.

In one aspect, rotary cutting tools are described herein comprising sets of coolant channels having exit aperture in the flutes of the tools for efficient coolant delivery to multiple cutting surfaces. Briefly, a rotary cutting tool comprises a shank portion, and a cutting portion extending from the shank portion along a longitudinal axis, the cutting portion comprising flutes helically extending along the longitudinal axis and internal coolant channels comprising exit apertures in the flutes. A projection of an exit aperture of a first set of internal coolant channels intersects a rake face extending below a corner edge of the rotary cutting tool, and a projection of an exit aperture of a second set of internal coolant channels intersects a rake face below a radial cutting edge of the rotary cutting tool.

A tool body (12) for a shell end mill (10) is described with at least one helical chip guiding groove (24) arranged at the circumference of the tool body (12) for chip dissipation and at least two receptacles (28) for indexable cutting inserts (26) arranged at the chip guiding groove (24). In this case, the receptacles (28) each comprise a base surface having a bore for receiving an indexable cutting insert fastening screw (34) and at least one first abutment surface adjacent to the base surface. The transition between the base surface and the first contact surface is a groove. In addition, a cutting tool is described with such a tool body, wherein a two-sided indexable cutting insert (26) is attached in each receptacle (28).

A cutting insert has a cutting edge formed on part of an intersecting ridge line portion of an upper face or a lower face and a side face. The cutting edge includes a major cutting edge, a minor cutting edge, and a connecting cutting edge that connects the major cutting edge and the minor cutting edge. A minor cutting edge flank that is part of the side face and that corresponds to the minor cutting edge includes a first minor cutting edge flank that connects to the minor cutting edge and that has a clearance angle of 0°, and a second minor cutting edge flank that connects to the first minor cutting edge flank and that has a clearance angle of a negative value. A connecting cutting edge flank that is part of the side face and that corresponds to the connecting cutting edge includes a first connecting cutting edge flank that connects to the connecting cutting edge and that has a clearance angle of 0° or greater, and a second connecting cutting edge flank that connects to the first connecting cutting edge flank and has a clearance angle that is greater than the clearance angle of the first connecting cutting edge flank.