A tool body and a turning tool for grooving operations having the tool body include a fitting member extending along a longitudinal first axis for fixing the tool body to a machine. The tool body's upper and lower clamping members each having respective inner seating surfaces facing one another and separated by an intermediate gap in which a cutting insert is insertable. A major part of the lower inner seating surface extends along a second axis perpendicular to the first axis. The clamping members are movable toward one another by a tightening device in order to secure the cutting insert in the intermediate gap. The tool body is integrally formed in a unitary piece. A hinge joint is formed between the clamping members, such that they are movable with respect to one another by turning around an axis of rotation of the hinge joint, extending perpendicularly to the second axis.

A grooving insert includes a front surface and an opposite rear surface, a first side surface and an opposite second side surface, and a top surface and an opposite bottom surface. The top surface includes a top front portion and a top rear portion, the top front portion having a cutting edge arranged symmetrically relative to a first plane. The bottom surface is symmetrically arranged in relation to a second plane, the first plane and the second plane forming an angle () of 0.5-5.0 relative to each other.

A cutting tool assembly includes: a tool body extending in a longitudinal direction; a lower jaw extending and protruding forward from the tool body; a clamping portion disposed to be spaced apart from a top surface of the tool body; an upper jaw extending forward from the clamping portion and facing the lower jaw; an elastic connecting portion elastically connecting the tool body and the clamping portion to each other on a rear side of the clamping portion; a clamping screw penetrating the clamping portion downwardly and fastened to the tool body; and an upper coolant channel through which coolant flows, the upper coolant channel penetrating the elastic connection part, the clamping portion, and the upper jaw. In a width direction perpendicular to the longitudinal direction, a width of the clamping portion is in a range of 40% to 80% of a width of the tool body.

A tool body and a turning tool for grooving operations having the tool body include a fitting member extending along a longitudinal first axis for fixing the tool body to a machine. The tool body's upper and lower clamping members each having respective inner seating surfaces facing one another and separated by an intermediate gap in which a cutting insert is insertable. A major part of the lower inner seating surface extends along a second axis perpendicular to the first axis. The clamping members are movable toward one another by a tightening device in order to secure the cutting insert in the intermediate gap. The tool body is integrally formed in a unitary piece. A hinge joint is formed between the clamping members, such that they are movable with respect to one another by turning around an axis of rotation of the hinge joint, extending perpendicularly to the second axis.

A cutting tool able to sufficiently supply coolant toward a cutting edge of a cutting insert during a cutting process involving grooving a workpiece face includes a first flow path through which coolant is supplied toward a body leading end side, a first jetting port, a second flow path branching at a branch point along the first flow path, a second jetting port, and a guide member having a guide surface distanced from the second jetting port and forming a space for coolant to flow to the cutting edge from the second jetting port. In the first flow path, a substantially straight upstream-of-branch flow path on further toward a base end side than the branch point is at least twice as long as a downstream-of-branch flow path from the first jetting port to the branch point. The second flow path inclines at a 30? to 85? angle to the upstream-of-branch flow path.

A plate member of a cutting tool has two side surfaces being substantially rectangular in shape, a top surface and a bottom surface extending in a direction along a long side of the rectangle, and two end surfaces in a short-side direction. A cutting edge is located on the side of one of the end surfaces. One of the side surfaces is a curved surface bulging outward. The bottom surface has an inclined portion which is inclined with respect to the top surface. The plate member is held by a tool block having a bottom restraining surface which comes into contact with the bottom surface, and is fastened to the tool block by using a clamp member having a top restraining surface which comes into contact with the top surface of the plate member.

A cutting insert according to an embodiment of the present invention has a body section and a cutting section located closer to a front end side than the body section. The cutting section has an end cutting edge located along an intersection of an upper surface and a side surface, a recess located from the end cutting edge toward the body section, and a pair of protrusions opposed to each other with the recess interposed therebetween. The pair of protrusions has a first protrusion and a second protrusion located on the first protrusion. The first protrusion has a first inclined surface that is inclined upward and approaches another one of the pair of protrusions as going from the front end side toward the rear end side. A periphery of the second protrusion which is close to the front end side has a convex curvilinear shape in a top view.

A cutting tool comprises: a plate member which is provided, at a leading end thereof, edge parts; a support member which supports the plate member so as to cause the edge parts to be projected; and a coolant supply part which has an ejection port and which ejects, from the ejection port, fluid that cools the edge parts. The support member has a non-contact surface which forms a gap with respect to an outer side surface of the plate member. The gap is opened toward a side where the edge parts are provided. The ejection port is arranged in the gap, and the ejection port ejects the fluid toward the plate member.

In one example, a pipe machining apparatus is provided and includes a frame, a tool carrier coupled to and rotatable relative to the frame, a first machining apparatus including a first tool support and a first tool supported by the first tool support and a second machining apparatus including a bridge member, a second tool support supported by the bridge member, and a second tool supported by the second tool support. The first tool is configured to perform a first machining operation and the second tool is configured to perform a second machining operation different than the first machining operation. The first machining apparatus and the second machining apparatus are interchangeably couplable to and rotatable with the tool carrier.

A cutting tool assembly includes: a tool body extending in a longitudinal direction; a lower jaw extending and protruding forward from the tool body; a clamping portion disposed to be spaced apart from a top surface of the tool body; an upper jaw extending forward from the clamping portion and facing the lower jaw; an elastic connecting portion elastically connecting the tool body and the clamping portion to each other on a rear side of the clamping portion; a clamping screw penetrating the clamping portion downwardly and fastened to the tool body; and an upper coolant channel through which coolant flows, the upper coolant channel penetrating the elastic connection part, the clamping portion, and the upper jaw. In a width direction perpendicular to the longitudinal direction, a width of the clamping portion is in a range of 40% to 80% of a width of the tool body.