摘要:
A cutting tool, preferably for milling, includes a holder and a cutting insert mounted thereon. The holder includes a seat upon which the insert is mounted, and an upstanding wall structure against which an edge face of the insert is pressed. The edge face has upper and lower portions separated by a step. The upper portion is frustoconical and is pressed against an upper wall of the wall structure to frictionally resist rotation of the insert about the insert's center axis. The lower portion of the edge face is polygonal and is adapted to engage a lower wall of the wall structure at a location spaced radially inwardly from a location where the upper portion and upper wall make contact. The lower portion rotates into engagement with the lower wall in response to cutting forces acting on the insert, to create an interference relationship between the lower portion and lower wall which prevents further rotation of the insert.
摘要:
A toolholder for holding a plurality of types of removable cutting inserts is provided. The toolholder includes a toolholder body having an insert-receiving recess. The recess includes an insert abutment surface for abutting a corresponding insert supporting surface of an insert. The insert abutment surface includes a first portion that abuts a first insert supporting surface of a first type of cutting insert and a second portion abuts a second insert supporting surface of a second type of cutting insert.
摘要:
In a cutting insert and a milling tool, where the cutting insert is to be on-edge mounted to the tool, the cutting insert includes a polygonal body of wear resistant material. The body includes a first side surface and a second side surface opposing one another and therebetween a number of end surfaces. The intersection of two end surfaces form a cutting edge at a corner portion. The first side surface is substantially planar and the second side surface connects to raised portions at corner portions. The first side surface is greater than the second side surface.
摘要:
A circular cutting insert includes a top surface having a top edge portion, a side surface having a clearance surface and a clearance edge portion. A cutting edge is formed between the clearance edge portion and the top edge portion. The clearance edge portion and the top edge portion form a wedge angle. The wedge angle varies as a function of circumferential position about a central axis of the insert relative to a point on the cutting edge.
摘要:
A reamer for chip removing machining includes a holder having a line of pockets, each pocket including a support surface facing in a direction of feed of the holder. Cutting inserts are mounted in respective ones of the pockets and project out of the pocket at progressively greater distances. Clamping assemblies clamp respective inserts in their respective pockets. Each clamping assembly includes a shank projecting into a hole formed in the pocket, a clamping head fixed to the shank and situated in the pocket, and a spring yieldably biasing the shank and the clamping head to a position wherein the clamping head forces a rear surface of the insert against the support surface. By depressing a shank against its spring bias, a respective insert can be replaced.
摘要:
A face milling cutter comprises a holder adapted to be rotatable about an axis. A plurality of first cutting inserts, and a plurality of second cutting inserts are mounted in respective pockets of the holder. The first and second inserts alternate circumferentially with one another. The first and second inserts are identical and include a center hole for receiving a fastener screw. The central hole of the first inserts are oriented orthogonally relative to the center hole of the second inserts, whereby the first inserts are turned by about 90 degrees relative to the second inserts. The axial relationship of the second inserts relative to the first inserts is determined by shims disposed between the holder and respective ones of the second inserts.
摘要:
In a cutting insert and a milling tool, where the cutting insert is to be on-edge mounted to the tool, the cutting insert includes a polygonal body of wear resistant material. The body includes a first side surface and a second side surface opposing one another and therebetween a number of end surfaces. The intersection of two end surfaces form a cutting edge at a corner portion. The first side surface is substantially planar and the second side surface connects to raised portions at corner portions. The first side surface is greater than the second side surface.
摘要:
The present invention relates to an indexable cutting insert for an end mill for machining of contours in a workpiece and to a milling tool. The cutting insert is asymmetrical in respect of a line through a hole in the cutting insert. The cutting insert includes two cutting edge portions. Each cutting edge portion comprises of a substantially straight cutting edge and a curved cutting edge along respective intersecting lines between a clearance surface and a chip surface. The curved cutting edges have different lengths. The cutting insert includes recesses in a bottom side of the cutting insert. The recesses are arranged on both sides of and at different distances from the hole of the cutting insert.
摘要:
A shank carries a milling tool and has a clamping portion adapted to be mounted in a bore of a chuck. The chuck has first and second locking screws which are engageable with first and second recesses, respectively, formed on a cylindrical outer surface of the clamping portion of the shank. The first recess is configured such that the first locking screw urges the clamping portion into the bore to press a surface of the shank against the chuck. The second recess comprises first and second longitudinally adjacent planar surfaces which form an angle with one another. Depending upon the angle of inclination of the second locking screw (that angle varies in different types of chucks), the second locking screw will flushly engage one or the other of the surfaces for preventing rotation of the shank within the bore.