494results about "Adverse effect compensation" patented technology

A tool holder for a tool for machining a workpiece. The tool holder has a cutting insert receptacle for receiving a cutting insert, wherein the cutting insert receptacle has an upper clamping jaw for abutting an upper surface of the cutting insert and a lower clamping jaw for abutting a lower surface of the cutting insert opposite the upper surface. Further, the tool holder has an internal coolant channel extending inside the tool holder between a coolant inlet opening and a coolant outlet opening, wherein an end portion of the coolant channel extending inside the upper clamping jaw along a channel center axis opens into the coolant outlet opening. The coolant outlet opening is arranged at the upper clamping jaw and configured as an elongated opening. A width of the coolant outlet opening is smaller than a height of the coolant outlet opening measured orthogonally to the width of the coolant outlet opening. The end portion of the coolant channel is also elongated in a cross-section orthogonal to the channel center axis. A width of the end portion measured orthogonal to the channel center axis is smaller than a height of the end portion measured orthogonal to the channel center axis and orthogonal to the width of the end portion.

The invention discloses a thin-wall workpiece milling chatter suppression method based on a piezoelectric actuator. The system comprises an acceleration sensor, a piezoelectric actuator and a signal processing module. The acceleration sensor and the piezoelectric actuator are both installed on the workpiece. In the milling process, the acceleration sensor detects a displacement signal generated by vibration of a workpiece and sends the displacement signal to the signal processing module; a PID controller is arranged in the signal processing module; and the signal processing module adjusts a control signal of the piezoelectric actuator, so that the piezoelectric actuator generates active vibration for inhibiting milling chatter of the workpiece. The acceleration sensor and the piezoelectric actuator are arranged on the workpiece, in the milling process of the thin-wall workpiece, the displacement signal of the thin-wall workpiece is detected, and the input signal of the piezoelectric actuator is dynamically adjusted, so that milling chatter of the thin-wall workpiece is counteracted and restrained through vibration of the piezoelectric actuator, and the milling precision of the thin-wall workpiece is improved. The surface roughness and machining errors of the thin-wall workpiece are reduced, and the machining quality is remarkably improved.

A turning toolholder includes a shank, a club head, and a clamp and a clamp screw for clamping a cutting insert. The club head includes a clamp coolant supply hole in fluid communication, a flank coolant supply hole and an auxiliary rake coolant supply hole, all in fluid communication with the main coolant supply hole. Coolant is supplied through a rake coolant exit opening formed in the forward nose portion of the clamp to direct coolant to the top rake surface of the cutting insert, and coolant is supplied through a flank coolant exit opening located below the insert-receiving pocket to provide coolant to the side flank surfaces of the cutting insert. In addition, an auxiliary rake coolant supply housing formed on a top surface of the club head supplies additional coolant to the top rake surface of the cutting insert during high heat applications.

A machining system configured to reduce spring back following machining operations comprising a machining tool and a spring back control system. The spring back control system comprises a number of force generators and a number of force loaded members coupled to the number of force generators, each force loaded member of the number of force loaded members comprising a material contact surface. The material contact surface is a roller, wherein the machining tool is independently moveable relative to the spring back control system.

A two-hole core drilling machine of the invention includes a body, a vertically reciprocating carriage vertically reciprocably mounted to the body, a fixing plate coupled to one side surface of the carriage, to rotatably support a drive shaft of a motor, a pivoting plate fastened to the fixing plate under a condition that a pivot angle of the pivoting plate is changed, a moving plate fastened to the pivoting plate under a condition that a length of the moving plate from the pivoting plate is varied, a belt or chain mounted between a drive pulley coupled to the drive shaft and a driven pulley coupled to a driven shaft rotatably mounted to the moving plate, a first core bit coupled to the drive shaft, and a second core bit coupled to the driven shaft.

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

A milling tool (101) comprises a tool body (102) and replaceable cutting inserts (109a-h) mounted in associated insert seats (108a-h) arranged in succession one after the other in the front end (103) of the tool body. The insert seats are unevenly distributed in the tool body to provide irregular angular distances between cutting edges (113) of each pair of consecutive cutting inserts. A first insert seat (108a) is configured to keep the cutting edge of a first cutting insert (109a) axially more forwardly than the cutting edges of the other inserts (109b-h) and the angular distance between the first cutting insert and the insert immediately in front of it is smaller than the angular distance between any other pair of consecutive cutting inserts. The invention also relates to a tool body (102) for such a milling tool (101).

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 cutting insert includes a corner cutting region and a cooling channel formed in a wall cavity. The cutting insert includes a body having an upper insert surface, a lower insert surface defining a lower insert plane, and at least one sidewall extending therebetween. The corner cutting region is defined between the at least one sidewall and the upper insert surface. The at least one sidewall is formed with at least one cooling channel formed in a wall cavity defining a coolant flow' path having an upstream section with a coolant inlet facing the lower insert plane. The coolant flow' path further has a downstream section extending beneath the corner cutting region. The coolant flow' path is at least partially exposed to an exterior of the cutting insert and includes an arcuate portion between the upstream section and the downstream section.

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.

The invention discloses a lightweight damping turning tool bar, and belongs to the technical field of machine tool cutters. The turning tool bar comprises a tool body, a plurality of cavities are formed in the tool body in the length direction, and the part, between every two adjacent cavities, of the tool body is of a BCC lattice structure. The closed magnetic pole device comprises a plurality of magnetic pole pieces which are respectively positioned at the bottom and the side wall of the cavity; the swing type vibration absorber is arranged in the closed magnetic pole device composed of the multiple magnetic pole pieces, magnetic pole patches corresponding to the magnetic pole pieces one to one are arranged on the outer side face of the swing type vibration absorber, and the polarities of the magnetic pole patches and the sides, opposite to the magnetic pole pieces, of the magnetic pole patches are the same, so that the magnetic force of the magnetic pole pieces and the magnetic force of the corresponding magnetic pole patches repel each other. The weight of the cutter bar is reduced, the influence of cutting machining vibration caused by long overhanging of the cutter bar is weakened, vibration transfer is achieved through the swing type vibration absorber structure, fluttering is restrained, the machining stability is improved, and the machining precision is guaranteed.

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.