318results about "Adverse effect compensation" patented technology

A sensorless method for machine tool chatter detection. A motor torque signal is analyzed in the time domain to determine whether a bit is currently cutting workpiece material. When not cutting material, an air-cut reference signal is stored for later use. When cutting material, the motor torque signal is converted to the frequency domain and filtered in a two-step process. The first filtering step includes removal of the air-cut reference signal via spectral subtraction, which removes noise and harmonics not directly related to chatter. The second filtering step includes further removal of spindle harmonic components at frequencies known from the spindle speed provided by the machine controller, where this step removes harmonic contents without distorting nearby contents. After filtering, two indicator criteria are evaluated to detect chatter, including a magnitude of the filtered torque signal and a magnitude ratio of the filtered torque signal to the air-cut reference signal.

A mass damper device includes a tubular housing having a first and a second longitudinal end; at least one damping mass which is received in the tubular housing with a circumferential clearance; a first resilient element and a second resilient element. At least one end closure is arranged at the first or second longitudinal end. The housing and the end closure have cooperating mounting surfaces which define a longitudinal mounting position of the first and second end closures. The mounting surfaces are arranged such that the first and second resilient elements are compressed between the damping mass and the end closure, when the first and second end closures have been mounted, at the longitudinal mounting position, to the housing.

To provide a sensorless method for machine tool chatter detection.SOLUTION: A motor torque signal is analyzed in the time domain to determine whether a bit is currently cutting workpiece material. When not cutting material, an air-cut reference signal is stored for later use. When cutting material, the motor torque signal is converted to the frequency domain and filtered in a two-step process. The first filtering step includes removal of the air-cut reference signal via spectral subtraction, which removes noise and harmonics not directly related to chatter. The second filtering step includes further removal of spindle harmonic components at frequencies known from the spindle speed provided by the machine controller, where this step removes harmonic contents without distorting nearby contents. After filtering, two indicator criteria are evaluated to detect chatter, including a magnitude of the filtered torque signal and a magnitude ratio of the filtered torque signal to the air-cut reference signal.SELECTED DRAWING: Figure 3

To provide a body provided with a flow passage having a sufficient cross-sectional area while securing sufficient rigidity, and a cutting tool.SOLUTION: A body 10 of a cutting tool 1 includes: an insert pocket 20 to which a cutting insert 60 is attached; a screw hole 22 into which an insert mounting screw 70 for fastening the cutting insert 60 to the insert pocket 20 is screwed and inserted; and a chip discharging coolant flow passage 50 for discharging coolant C from a discharge port 52 open at a tip. In a cross section orthogonal to an axial direction, at least a portion of the chip discharging coolant flow passage 50 has a distance Da from the insert pocket 20, a distance Db from the screw hole 22, and a distance Dc from an outer periphery 10c of the body 10 which are equal to or larger than a prescribed dimension.SELECTED DRAWING: Figure 5

A tool chuck for clamping tools incudes a sleeve section with an open free end adjoining a tool chuck main body towards the free end. The sleeve section forms a tool receptacle for fixedly receiving the tool shank in a friction-fitting manner with an interference fit. The sleeve section is formed of inner and outer sleeves. The outer sleeve, in an operationally ready state, receives the inner sleeve and is joined thereto without clearance. There is an expansion gap between the tool chuck main body, the inner sleeve and the outer sleeve, or at least one first intermediate sleeve is disposed between the inner and outer sleeves, or a functional face of at least one of the structural parts joined to one another at the sleeve section is thermochemically heat-treated and / or coated. A method of using a tool chuck and a chuck system are also provided.

The invention belongs to the technical field of robot milling vibration control, and particularly relates to a three-dimensional unit cell type vibration absorber for restraining variable flutter during robot milling and a design method of the three-dimensional unit cell type vibration absorber. The vibration absorber comprises a plurality of magnetic conductive balls, a plurality of magnetorheological elastomers, a magnetic conductive block, an electromagnetic coil, an upper wall, a lower wall and four side walls. The upper wall, the lower wall and the four side walls form a cubic structure, the electromagnetic coil sleeves the outer walls of the four side walls, and the magnetic conductive block sleeves the outer wall of the electromagnetic coil and is connected with the upper wall and the lower wall; the three-dimensional unit cell type vibration absorber is of a central symmetry structure. The plurality of magnetic conductive balls are arranged in the cubic structure according to the form of the body-centered cubic structure, the inner wall of the cubic structure is connected with the magnetic conductive balls, and the magnetic conductive ball located at the body center is connected with the magnetic conductive balls located at the eight vertex angles through the magnetorheological elastomer. The whole structure has three-dimensional symmetry, so that the structure can still keep stable under any rotating posture of the robot, modals of different directions and frequencies of the robot can be restrained, and the restraining effect is good.

A cutting tool includes: a cutting edge configured on an intersecting line of a rake surface and a flank; a breaker wall formed inside the cutting edge and protruding above the cutting tool; a boss part including a boss surface formed above the breaker wall; and a plurality of recessed parts formed in the boss part so as to extend toward the cutting edge. The width of the breaker wall in a direction in which the cutting edge extends along an intersecting line (including a virtual intersecting line or a virtual extension of the intersecting line) of the boss surface and the breaker wall, is greater than the width of a groove formed by the recessed part along the same intersecting line.

A rotary cutting tool comprising a tool body (2) and a cutting head (30) with a coupling portion (31) receivable between axially projecting coupling legs (12) on the tool body. Each coupling leg has a torque transfer surface (15), which is configured to abut against a corresponding torque surface (35) on the cutting head in order to transfer torque from the tool body to the cutting head. Each one of said torque surfaces (35) on the cutting head is convex as seen in any plane that is perpendicular to the centre axis (C2) of the cutting head and extends across the torque surface (35), and / or the torque transfer surface (15) on each one of said coupling legs is convex as seen in any plane that is perpendicular to the centre axis (C1) of the tool body (2) and extends across the torque transfer surface (15).

Utilities supplied through a first utility path of a turning tool holder via a docking device is supplied to a second utility path of an adjacent rotating tool holder through a communication means, there is no need to provide a complex hydraulic line, a pneumatic line and a coupler for receiving the utilities from the docking device at a rearward side of the rotating tool holder. A rearward size of the rotating tool holder may be minimized, so that even when the rotating tool holder is mounted on the turret, no interference occurs with the docking device in the rearward direction when the turret rotates. As a result, it is possible to use the rotating tool holder, to which utilities supply is necessary, even in the turret which is provide with the docking device.

A method for machine tool chatter detection which combines sensorless and sensor-based measurement methods and makes a determination based on analysis of both sensorless and sensor-based signals. The sensorless branch uses data known to the machine tool controller, such as spindle torque data or servo motor position / velocity data, where a time-series sample is recorded, the data is converted to the frequency domain and filtered, and criteria are evaluated to detect chatter. The sensor-based branch uses sound data recorded by a microphone, where data is again recorded, converted to the frequency domain, filtered, and evaluated. When both sensorless and sensor-based evaluation branches detect chatter at a common frequency, it is determined that chatter is occurring in the machine tool and appropriate steps are taken. The integrated chatter detection technique avoids false indicators of chatter which may arise due to noise present at different frequencies in the sensorless and / or sensor-based signals.

A boring head arranged for holding a boring tool for metal cutting includes a main body having a support surface and a scale surface. The boring head further includes a piston including a boring tool interface for fixedly carrying the boring tool. The piston is movably arranged in the main body along the positioning axis (y), and a micrometer screw. The micrometer screw is arranged in the main body and coupled to the piston, such that, when the micrometer screw is rotated, the piston is moved along the positioning axis to one of the protracted positions or the retracted position. The micrometer screw has a head abutting against the support surface. The head includes a radially outer head surface provided with first graduation marks. The scale surface is provided with second graduation marks aligned with the first graduation marks to provide a reading of the axial position of the piston.

A cutting tool includes: a cutting edge configured on an intersecting line of a rake surface and a flank; a breaker wall formed inside the cutting edge and protruding above the cutting tool; a boss part including a boss surface formed above the breaker wall; and a plurality of recessed parts formed in the boss part so as to extend toward the cutting edge. The width of the breaker wall in a direction in which the cutting edge extends along an intersecting line (including a virtual intersecting line or a virtual extension of the intersecting line) of the boss surface and the breaker wall, is greater than the width of a groove formed by the recessed part along the same intersecting line.

A four-way indexable plate-shaped cutting insert () that is indexable about a central insert axis and a cutting tool. The cutting includes a base body, a first insert side surface, a second insert side surface opposite the first insert side surface, a peripheral insert surface that connects the first insert side surface and the second insert side surface, and four cutting arms. The peripheral insert surface of each cutting arm includes a rake surface, a relief surface facing in the opposite direction, and a cutting edge formed at an intersection of the rake surface and the relief surface. The first insert side surface includes a first portion that is farther away from an insert median plane than the another portion thereof. The first insert abutment portion defines a coolant groove that is recessed in the first insert abutment portion. The coolant groove opening out to the first arm side portion.

A rotary cutting tool comprising a tool body (2) and a cutting head (30) with a coupling portion (31) receivable between two axially projecting coupling legs (12) on the tool body. Internal clamping surfaces (14) on the coupling legs are designed for press fit engagement with cylindrical external clamping surfaces (34) on the cutting head. Each internal clamping surface is conical and inclined at a small angle outwards away from the centre axis of the tool body as seen in a direction from an upper edge to a lower edge of the internal clamping surface, or divided into a cylindrical first sub surface (14a) and a conical second sub surface (14b) that is located axially rearward of the first sub surface and inclined at a small angle outwards away from the centre axis of the tool body as seen in a direction from an upper edge towards a lower edge of the conical second sub surface.

A cutting tool with a coolant system having a cutting blade, a cutting insert and a blade holder. The cutting blade has a first blade bore having a first bore peripheral surface and an entry gap recessed therein. On assembling the cutting tool, a fastening element clamps the first bore peripheral surface and seals the first blade bore, releasably securing the cutting blade to the blade holder and allowing a fluid connection between the blade holder and the cutting blade.

A vibration-damping hydraulic tool holder based on a multi-cavity structure is provided. The vibration-damping hydraulic tool holder based on the multi-cavity structure includes a gripper, one end of the gripper is provided with an installation groove, the installation groove is filled with a sealing sleeve, the center of the sealing sleeve is provided with a clamping hole for clamping the tool, and several independent hydraulic units are set on the gripper to apply clamping force to the tool; the hydraulic unit consists of two hydraulic components, the two hydraulic components on the same hydraulic unit are set relatively and connected with each other, an oil injection hole is set on the gripper to add hydraulic oil to the hydraulic unit; The hydraulic tool holder based on multi-cavity structure vibration reduction can solve the problem of low surface quality caused by excessive vibration of the existing hydraulic tool holder.

The invention relates to a turning tool (1) comprising a tool body (2) with an insert seat (5) configured to accommodate a cutting insert (6a-c). The insert seat (5) comprises a bottom surface and first (8a) and second (8b) side wall sections, together defining a space for receiving the cutting insert. The insert seat (5) further comprises a stiff member (17) formed in one piece by a first end portion (18a) thereof to an upper part of the first side wall section (8a) and by a second end portion (18b) thereof to an upper part of the second side wall section (8b) so as to extend between and rigidly interconnect said side wall sections over said space. The invention also relates to a turning tool assembly comprising such a turning tool (1) and a cutting insert (6a-c).

A cutting insert in an aspect of the present disclosure has a cutting part. The cutting part has a first surface, a second surface, a third surface located between the first surface and the second surface, and a flow path extending from the first surface toward the second surface. The flow path has an outflow port opening into the first surface, and a first flow path extending from the outflow port toward the second surface. In a first cross section that passes through a central axis of the first flow path and is orthogonal to the first surface, a width of the first flow path in a direction parallel to the first surface increases as going away from the first surface.

Provided is a turning apparatus with MQL based on magnetic circulation and ultrasound-assisted infiltration, comprising a turning tool fixed with 2D ultrasonic auxiliary device; a magnetic circulation nozzle and magnetic circulation recycling nozzle arranged on both sides of turning tool; lubricant channels respectively provided inside magnetic circulation nozzle and magnetic circulation recycling nozzle; magnets arranged on peripheries of lubricant channels; polarities of ends of magnets on the two nozzles facing to turning tool are opposite; lubricant channel of magnetic circulation nozzle is connected to one end of first flexible pipe, and another end is connected to lubricant canister after passing through peristaltic pump; one end of second flexible pipe is connected to the peristaltic pump, and another end is connected to a filtering mechanism; one end of third flexible pipe is connected to the magnetic circulation recycling nozzle, and another end is connected to liquid inlet of filtering mechanism.

The machine tool (10) according to the invention has a work spindle (20), a workpiece table (12) and a workpiece holding device (15), which is attachable to the workpiece table (12), for supporting workpieces (11) that are long and / or have a complex shape, wherein the workpiece holding device (15) has an interchangeable workpiece bearing unit (21) which can be used to hold or support the workpiece (11) at a particular point. The particular feature of the present invention is that the workpiece bearing unit (21) can be interchanged automatically by the work spindle (20).

Cutting tool assemblies, end mills, and related methods are disclosed. In accordance with an implementation, a face mill includes a cylindrical body including a central bore, a plurality of face mill coolant passages fluidly coupled to the central bore, and a cutting face. The cutting face includes a plurality of radially spaced teeth and gaps between the teeth. Each face mill coolant passage includes an opening at a corresponding gap.

The present invention discloses an insert adaptor for parting off having an adaptor index axis and comprising: parallel and planar adaptor first and second sides connected by an adaptor peripheral surface which extends peripherally around the adaptor; the adaptor index axis extending through the center of the first and second sides; wherein the adaptor peripheral surface is formed with a plurality of pockets which are configured for resilient clamping and bearing surfaces extending between the pockets; characterized in that: the insert adaptor has a material volume of greater than 50% of an imaginary cylinder encompassing the insert adapter; and each of the bearing surfaces are straight.

The invention relates to a machining device (1) for producing at least one orifice (3) in a part (2) made of composite material, the machining device (1) comprising a tool holder (4) and at least one drill bit (5) mounted on the tool holder (4), the drill bit (5) being intended to be driven in rotation about an axis of rotation (10). According to the invention, the machining device (1) comprises a cylindrical guide body (20) coaxial with the axis of rotation (10), mounted on the tool holder (4), and surrounding the drill bit (5), the guide body (20) being intended to bear on the part (2) during the production of the orifice (3) and the drill bit projecting from the guide body (20). Figure for abstract: Fig.1

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.

To provide a turning tool which can inhibit hindrance of rotation of a turret while securing high waterproofness, and to provide a turning device.SOLUTION: A turning tool includes a power receiving coil, a sensor, and a wireless unit. The power receiving coil receives electric power transmitted from a power transmitting coil in a non-contact manner. The sensor is electrically connected to the power receiving coil. The wireless unit transmits data detected by the sensor to the outside.SELECTED DRAWING: Figure 1

To provide a shrink fit chuck with novel attenuation.SOLUTION: The invention relates to a clamp chuck for clamping a tool having a tool shank. The clamp chuck is provided with a sleeve part (4). The sleeve part (4) opens at its free end, is composed preferably of a conductive material, and forms a tool holder (5) for frictionally engaging and fixing the tool shank by press-in by shrink fit. In the clamp chuck, the sleeve part (4) is preferably composed of an inner sleeve (7) across its full length in an axial direction of the tool holder (5) and an outer sleeve (8) which receives the inner sleeve (7) in the state dynamically prepared, is bonded to the inner sleeve (7) without a play and is preferably composed of a conductive material.SELECTED DRAWING: Figure 1

A rotary tool (1, 1a, 1b), comprising: a base (3) which has a rod shape and extends along an axis of rotation (X) from a first end (3a) to a second end (3b), where the base (3) a cutting part (5) arranged to have the first end (3a), a shaft part (7) which is arranged closer to one side of the second end (3b) than the cutting part (5), and a flow path (9) that is arranged within the base (3) and extends along the axis of rotation (X), the cutting part (5) has an outer perimeter area (11), a first cutting edge (13) which is arranged from the first end (3a) in the direction of the outer circumferential surface (11), a first groove (15) extending helically from the first cutting edge (13) towards one side of the second end (3b), and a first ridge line (17) formed by the first groove (15) and the outer circumferential surface (11), which is adjacent to the first groove (15) on a rear side in a direction of rotation (Y) of the axis of rotation (X), the flow path (9) a main flow path (19) extending from one side of the second end (3b) to one side of the first end (3a), and a first secondary flow path (21) extending from the main flow path (19) towards one side of the second end (3b), the first secondary flow path (21) has a first opening (23) which leads into the first groove (15), a first angle (Θ1) formed by the axis of rotation (X) and the first sideflow path (21) is smaller than a skew angle (Θ2) formed by the axis of rotation (X) and the first crest line (17), and the first angle (Θ1) is set to 0 degrees to 25 degrees

A tool holder, for a tool assembly, comprising a tubular element having a cavity and a central axis; a damping mass arranged within the cavity and movable radially with respect to the central axis and relative to the tubular element; an adapter having a rear part fixed to the tubular element, and a front part for connection to an end effector of the tool assembly, the rear part comprising an opening, and the damping mass is at least partly received in the opening with a radial clearance; and an elastic element positioned between the adapter and the damping mass, the elastic element being arranged to support the damping mass and to damp radial vibrational movements of the damping mass relative to the tubular element, and the elastic element comprising a front surface substantially perpendicular to the central axis and a rear surface substantially perpendicular to the central axis.

The invention relates to a drilling method, in particular for a turbine shaft of an aircraft turbine engine, which method is implemented by a drilling machine (100) including a drill rod (8), a cutting tool (4) mounted on a free end of the drill rod, and an anti-vibration ring (10) positioned on the drill rod behind the cutting tool, the anti-vibration ring including a sleeve including a bore extending longitudinally coaxially between a front end and a rear end of the sleeve, as well as a first absorption means positioned in the bore and a second absorption means positioned on an outer circumference of the sleeve, the method including steps of: a) placing the anti-vibration ring on the drill rod near a free end of the drill rod; b) securing the cutting tool to the free end of the drill rod; c) drilling a bore to be made in the turbine shaft by pushing, during which the anti-vibration ring is inserted into an inlet (21) of the bore to be made.

The present invention relates to a turning tool for metal cutting, including a tool body (1) having an insert seat (8), a clamping member (11), and a clamping pin (17). The clamping pin connects the tool body (1) and the clamping member (11) to clamp a cutting insert (9) to the insert seat (8). The clamping pin (17) has a shaft (18) axially movably received in a bore (10) of the tool body and operable to move to a first axial position. In the first axial position, the clamping pin (17) is configured to engage with the clamping member (11) and press the clamping member (11) toward an upper surface (4) of the tool body, thereby clamping the cutting insert (9) to the insert seat (8) when the cutting insert (9) is received in the insert seat (8). In the first axial position, the first coolant outlet opening (22) in the head (20) is located above the upper surface (14) of the clamping member (11) and the shaft (18) is axially slidably received in the tool body bore (10) for axial movement. The turning tool further includes a locking mechanism configured to releasably lock the shaft (18) in the tool body bore (10) against at least axial sliding toward the tool body top surface (4) in the first axial position.