746 results about "End mill" patented technology

A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute.

A cutting tool and track system includes a multi-segment track assembly configured to be removably attached to a surface of a workpiece, a carriage assembly configured to ride along the track assembly, a carriage drive mechanism arranged to drive the carriage assembly along the track assembly, a cutting tool assembly connected to the carriage assembly, and a tool driving system connected to the cutting tool assembly. The cutting tool assembly rotatably supports an end mill type cutting tool that may be driven in a radial cutting plane about the axis of a tubular workpiece or along a workpiece surface. A method is provided for cutting a workpiece wherein a cutting tool assembly rotatably supports an end mill mounted for travel along a predetermined transport path in a cutting plane about a central axis of the workpiece wherein the end mill is first fed through the wall thickness of the workpiece and the cutting tool assembly is moved along the transport path in the cutting plane to cut the workpiece.

A rotary cutting tool such as a helical end mill, having pockets arranged to overcome harmonic vibrations. The tool has at least two and in one embodiment all three of three spacing irregularities. In the first irregularity, columns of pockets, typically associated with flutes, are staggered circumferentially out of even spacing. In a preferred embodiment having three flutes, the flutes are mostly not centered on one hundred twenty degree intervals. In the second irregularity, at least some pockets are arranged at different radial rake angles. In the third irregularity, at least some pockets are arranged at different axial rake angles.

A double-sided ball end mill includes a body having a generally hemispherical forward end portion and a rearward end portion. The forward end portion includes insert-receiving pockets and chip pockets. A cutting insert can be mounted within each insert-receiving pocket. The cutting insert includes a first substantially planar surface, a second substantially planar surface, a first curvilinear side surface, a second curvilinear side surface, a first pair of cutting edges formed at an intersection between the first substantially planar surface and the first and second curvilinear side surfaces, and a second pair of cutting edges formed at an intersection between the second substantially planar surface and the first and second curvilinear side surfaces. The first and second planar surfaces are substantially parallel to each other, and the cutting insert is mirror symmetric about all three axes.

A center or non-center cutting end mill for orbital drilling of fiber reinforced plastic (FRP) materials includes a shank, a neck, a cutting head and two or more flutes. The end mill has a tool geometry with the following features: a dish angle between about 2 degrees to about 6 degrees; a helix angle between about 5 degrees to about 18 degrees; an end teeth radial rake angle between about 0 degrees and about 15 degrees; a peripheral teeth radial rake angle between about 8 degrees and about 16 degrees; a gashing axial rake angle between about 3 degrees to about 10 degrees; and a primary clearance angle between about 10 degrees to about 18 degrees. The end mill is made from a tungsten carbide substrate with cemented cobalt in a range between about 3 to 10 wt. % and a diamond coating having a thickness in a range between about 8 to 20 μm.

An end mill is provided that includes a shank section and a fluted section. One or more helical teeth are disposed along an outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The cutting surface of each helical tooth includes a first section, a second section, and a take-off peak disposed between the first section and second section. The cutting edge of each helical tooth includes a first portion having a first constant angle, and a second portion having a second constant angle unequal to the first constant angle, and an arcuate transition section connecting the first portion and second portion. Some embodiments of the present invention include more portions than the aforesaid first and second portions.

An end mill for machining titanium includes a cutting portion having blunt cutting edges alternated with flutes. Each flute includes, in order from the cutting edge, a rake surface, a concavely shaped bending portion, a convexly shaped ejecting portion and a tooth relief edge. The convexly shaped ejecting portion has an ejection height E, which is measurable between an apex of the ejecting portion to an imaginary straight line extending from a nadir of the adjacent bending portion of the flute to the adjacent tooth relief edge. In a plane perpendicular to a rotation axis of the end mill, the ejection height E and a cutting portion diameter D_E, fulfill the condition 0.010D_E<E<0.031D_E.

A tool such as a drill or end mill has a central portion formed of a relatively tough hard material connected to an outer peripheral portion formed of relatively wear resistant hard material, i.e., the outer peripheral portion is more brittle and wear resistant than the central portion. The chip flutes of the tool are disposed only in the outer peripheral portion and thus are formed entirely of relatively wear resistant hard material.

A method and apparatus for the removal of a broken stud from a cylinder head, and rehabilitation thereof, includes a precise alignment block for attachment to at least two intact studs or stud bores of a cylinder head for alignment of a pilot port over the broken stud. Further holes in the block along the length of the block match a stud pattern of a cylinder head of pre-determined stud spacing. The apparatus comprises a series of replaceable steady pilots and corresponding rotary tools in pairs, including an end mill and cooperating milling pilot for flat or concave milling of the end of the broken stud; a drill bit and cooperating drilling pilot for drilling the end of the broken stud; and a tap and cooperating threaded tapping pilot to form new threads in the cylinder head for accepting a new replacement stud. Optionally, a threaded coil insert can be used in the newly prepared stud bore, having outer threads matching the new threads and having inner threads matching a replacement stud.

Provided is a long life carbide end mill which can perform stable cutting in high-efficiency machining such as die machining and parts machining. A cutting method using such an end mill is also provided. When a certain wavy or nicked peripheral cutting edge is considered a reference peripheral cutting edge with reference phases in a pitch of the reference peripheral cutting edge, wherein the distance of each reference phase is an amount corresponding to a value obtained by dividing the pitch of the nicks or waveform of each peripheral cutting edge by the number of the cutting edges; and the phase of at least one of the remaining peripheral cutting edges is deviated in the direction of the tool axis from the corresponding reference phase by an amount corresponding to 5% or less (excluding 0%) of the pitch.

A rotary cutting end mill is provided. The end mill includes a shank section and a fluted section. The fluted section has a first end integrally attached to the shank section, a second end, and an outer surface. One or more helical teeth are disposed along the outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The helical cutting edge defines an outer circumferential cutting path. The cutting surface includes first, second, and third sections, and first and second take-off peaks. The first take-off peak is disposed between the first section and second section. The second take-off peak is disposed between the second section and the third section.

An eyeglass lens processing apparatus for processing a periphery of an eyeglass lens, the apparatus includes: a lens chuck shaft that holds and rotates the lens; an end mill that processes the periphery of the lens; an end mill tilting unit that varies a tilt of the end mill with respect to the lens chuck shaft; an end mill moving unit that relatively moves the end mill with respect to the lens held by the lens chuck shaft; a target lens shape input unit that inputs an target lens shape; a lens measuring unit that detects a position of a processing edge of the lens based on the input target lens shape; a memory that stores a beveling shape including a beveling tilt angle on a front surface side of the lens and a beveling tilt angle on a rear surface side of the lens; and a control unit that controls the end mill tilting unit and the end mill moving unit to perform a roughing process on the lens using the end mill based on the input target lens shape and to perform a beveling process on the roughing-processed lens using the end mill based on the detected position of the processing edge and the stored beveling shape.

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.

The invention discloses a construction method of an aluminium alloy material end milling-cutting force and cutting processing deformation model. According to the construction method, a milling-cutting force prediction model on the basis of an average cutting force is established; a milling-cutting force prediction model on the basis of an inclined cutting mechanism is established; on the basis of the established milling-cutting force prediction model on the basis of the average cutting force and the established milling-cutting force prediction model on the basis of the inclined cutting mechanism, single-tooth and multi-tooth transient milling-cutting force predictions are respectively carried out and obtained data is compared with testing data; an aluminum alloy material milling-cutting processing deformation model is established; on the basis of a real number encoded adaptive genetic algorithm, a flatness error of an end milled surface is predicted; the construction method has the important research significance for researching the processing deformation mechanism.

The invention belongs to the numerical control process technology and relates to an improvement to the numerical control milling process method of the thin-walled part die cavity. The method comprises the following steps: installing and clamping an thin-walled part, selecting a mechanical clamped cutter and an end milling cutter, measuring parameter, selecting a programming origin and cutting parameters, determining the cutter position of the mechanical clamped cutter, measuring the length difference of the end milling cutter and the mechanical clamped cutter, roughing a insert bit mechanically-clamped numerical control milling cutter, finishing a high-speed steel end milling cutter, etc. The invention is characterized in that the cutting parameters are as follows: the cutting depth of the mechanical clamped cutter is 0.4-0.6mm, the cutting depth of the end milling cutter is equal to the depth of the thin-walled part die cavity; the cutting speed of the mechanical clamped cutter is 1500-2500rpm, the cutting speed of the end milling cutter is 400-600rpm; and the feeding amount of the mechanical clamped cutter is 700-1200mm/min, and the feeding amount of the end milling cutter is 300-500mm/min. The numerical control milling process method of the invention has high working efficiency, and can ensure the working size precision of the thin-walled part, obtain lower surface roughness, eliminate size distortion of the part and increase the product quality.

An end mill is provided having an axis of rotation, a shank section and a fluted section, each extending along the axis of rotation, and a plurality of helical teeth. The fluted section has a first end attached to the shank section and a second end. The plurality of helical teeth is disposed within the fluted section. Each helical tooth has a cutting edge, a relief surface, a cutting surface, and an edge preparation surface. The edge preparation surface is contiguous with the cutting edge of the respective tooth.