4746results about "Milling cutters" patented technology

An end mill for metal cutting including a body, the body having a cutting section extending axially rearward from a front end. The cutting section includes a plurality of radially protruding and axially extending teeth. Each tooth has a front cutting edge, wherein the front cutting edge extends axially rearward and radially outward from an axially most forward point of the respective cutting edge. When the body is rotated, the cutting edge of each tooth forms a line of intersection in a central plane containing the central longitudinal axis. Each front cutting edge is interrupted by at least two chip splitting grooves, such that the line of intersection of the front cutting edge with the interrupting chip splitting grooves includes outer crests, each being located on an imaginary convex curve, at least two inner troughs, and curve parts, extending from one respective trough to one respective axially closest crest.

The invention relates to the technical field of milling cutters, in particular to a multi-tooth micro-blade milling cutter and a manufacturing method and application thereof. The multi-tooth micro-blade milling cutter comprises a cutter handle and a cutter head body, wherein the cutter head body is fixedly connected to one end of the cutter handle; the multiple cutter teeth are arranged on the outer side face of the cutter head body, and each cutter tooth extends to the tail end, close to the cutter handle, of the cutter head body from the top end, away from the cutter handle, of the cutter head body; each cutter tooth comprises a front cutter face, a rear cutter face and a cutting edge, the cutting edge is provided with a plurality of continuously-distributed micron-sized protruding micro-blades, the micro-blades form an arc-shaped sawtooth structure, the micro-blades extend to the front cutter faces and form micro grooves in the front cutter faces, the micro-blades extend to the front cutter faces and form micro grooves in the front cutter faces, and the micro-blades extend to the rear cutter faces and form micro grooves in the front cutter faces. The multi-tooth micro-blade milling cutter has the structure of the front angle of the front cutter face of the milling cutter tooth and the rear angle of the rear cutter face of the milling cutter tooth, the linear cutting blade of the traditional cutter tooth is dispersed into micro blades, the stress concentration of the cutter is reduced, a plurality of convex micro blades are in grinding motion on the machining face in the milling process, and the milling and grinding combined machining effect is formed. Unification of machining efficiency and machining precision is achieved.

A milling tool includes a first cutting portion having a first and a second cutting edge extending at the periphery of the first cutting portion along, or following a helical path around, a longitudinal axis of the milling tool. The first and second cutting edges are arranged such that, when the milling tool is rotated around its longitudinal axis, they form respective first and second lines of intersection in a central plane containing the longitudinal axis, wherein the first and the second lines of intersection are arcuate. The extension of the first cutting edge is different from the extension of the second cutting edge such that the first line of intersection is different from the second line of intersection.

The invention discloses a drilling and milling end mill, and belongs to the technical field of machining cutters. A W-shaped bottom edge cutting long edge is formed by the bottom edge outer side edge, the transition arc edge and the bottom edge inner side edge in the two bottom edge long edge parts, the bottom edge outer side edge is higher than the bottom edge inner side edge in the central axis direction of the cutting part, and a part of the bottom edge short edge is distributed on the side, away from the clamping part, of the bottom edge outer side edge. And the other part of the short edge of the bottom edge is distributed on one side, close to the clamping part, of the transition arc edge and the inner side edge of the bottom edge. Thus, during drilling, the transition arc edge, the bottom edge inner side edge and the bottom edge short edge mainly act, the bottom edge outer side edge basically does not participate in cutting, drilling cutting resistance is reduced, meanwhile, the length of the bottom edge short edge participating in drilling and milling, the transition arc edge and the bottom edge inner side edge is short, and the bottom edge short edge and the transition arc edge and the bottom edge inner side edge are distributed in different directions of the bottom of the cutting part respectively. And therefore, the generated cuttings are smaller, and the cuttings can be conveniently discharged from the long edge chip flutes and the short edge chip flutes of the bottom edge.

The invention relates to a milling burr (1) for an electrically or pneumatically operated hand-held tool for deburring, shaping, grinding and finishing iron-free surfaces, comprising: - a shank portion (2) and - a milling portion (4) made of a hard metal, in particular tungsten carbide, which adjoins the shank portion (2) and ends in a milling tip (6), wherein the milling portion (4) has a milling length (f) and a plurality of cutting edges (10) which are separated by mutually spaced main flutes (14) which have a main flute depth (h) and extend helically in a first twist direction (16) with a first twist angle (α) along the milling length (f), wherein each of the cutting edges (10) has a rake face (20) and a relief face (24) and a cutting edge (12) at the transition of rake face (20) and relief face (24), forming a rake angle (γ) and a relief angle (δ). The milling burr (1) according to the invention is characterized in that said relief face (24) is a first relief face (24) and said relief angle (δ) is a first relief angle (δ), wherein the first relief face (24) is adjoined in the circumferential direction of the milling portion (4) by a second relief face (26) which extends at a second relief angle (ε), and, in the region of the milling portion (4) with the largest diameter, the first relief angle (δ) is in the range from 6° to 20° and the second relief angle (ε) is in the range from 8° to 30°, and the second relief angle (ε) is greater than the first relief angle (δ). The invention also relates to the use of such a milling burr (1).

The utility model relates to the field of planer type milling machines, in particular to a planer type milling machine capable of quickly changing a cutter, a main shaft box is arranged on a planer type milling machine body, a driving shaft is rotatably arranged at the bottom of the main shaft box, a detachable mounting sleeve is mounted on the driving shaft, and a milling cutter assembly is mounted at the bottom of the mounting sleeve; a plurality of mounting parts used for clamping the mounting sleeves are movably arranged at the bottom of the driving shaft, mounting cavities corresponding to the mounting parts are formed in the mounting sleeves in a matched mode, and mounting sleeves are rotatably arranged on the outer sides of the mounting sleeves. According to the planer type milling machine, the installation sleeve can be assembled on the driving shaft through adaptive clamping between the installation piece and the installation cavity, the assembling mode is rapid and convenient, no external auxiliary tool needs to be used, a user can rapidly replace the milling cutter assembly on the planer type milling machine body, and the planer type milling machine can be conveniently used by the user.

The embodiment of the utility model discloses a deep hole machining combined tool in the technical field of hole machining drilling tools. When a deep hole is machined, the distance between the milling cutter blade and the chamfering cutter blade is adjusted according to the depth of the hole needing to be machined, the position of the chamfering cutter limiting block can be directly adjusted through the arrangement of the scale marks, a measuring tape does not need to be additionally used for measurement, and firstly, the milling cutter blade is fixed to a groove cavity of a first clamping groove through cooperation of a first bolt and a first threaded hole; then a second bolt is matched with a third threaded hole to fix a chamfering blade in a groove cavity of a second clamping groove, then a positioning sliding block is placed in a groove cavity of a first chip removal groove, and after size adjustment is completed, the third bolt is placed in a hole cavity of a first limiting hole and a hole cavity of a second limiting hole, so that the third bolt is screwed into a hole cavity of the second threaded hole; and the position of the positioning sliding block is fixed, so that the chamfer is machined while the deep hole is machined.

The invention discloses an energy storage battery pole milling device and relates to the technical field of energy storage battery pole milling. The energy storage battery pole milling device comprises a bottom plate, supporting columns are fixed to the four edges of the top face of the bottom plate, an operation plate is fixed to the top faces of the four supporting columns, two sliding grooves are formed in the top face of the operation plate, and a square opening is formed in the left side of the top face of the operation plate; a U-shaped frame is fixed to the top face of the operation plate, a driving module is fixed to the top face of the U-shaped frame, a cutting disc is fixedly installed on the bottom face of a rotating shaft of the driving module, two T-shaped rings are fixed to the top face of the operation plate, clamping assemblies are arranged on the inner walls of the two T-shaped rings, and each clamping assembly comprises a screw. The energy storage battery pole is tightly clamped by the rubber block to move rightwards, so that the problem that the surface of the energy storage battery pole is damaged by milling of equipment due to shaking of the energy storage battery pole is solved.

A cutting insert includes at least two peripheral cutting edges. An insert holder assembly includes an insert holder which include an insert pocket and an ejector chamber connected by a through hole. The insert holder assembly includes an ejector member located at least partially in the ejection chamber, and a compressible biasing member. In an inner position, the biasing member exerts a compressive force on the ejector member. When the cutting insert is releasably attached to the insert holder by a fastening member which is connected to the ejector member, to constitute a fastened position of a cutting tool, the insert holder assembly is in the inner position and the fastening member clamps the cutting insert so that the insert lower surface abuts the pocket base surface.

End mill is provided with outer periphery cutting edges and end cutting edges along spiral flutes. Spiral flutes include first and second flutes. Flute bottom of first flute is with linear portion, R-shaped portion, and gradient portion. The linear portion extends in parallel to axis line O and in straight-line shape, from tool distal end toward rear end side to position separated from the tool distal end by length corresponding to tool outer diameter. The gradient portion is provided to the rear end side, and is inclined straightly toward outer side in radial direction toward the rear end side. The R-shaped portion connects rear end of the linear portion and front end of the gradient portion, and is curved in circular arc shape toward the outer side in the radial direction. Rake angles of the outer periphery and end cutting edges are constant over entire periphery.

The present disclosure relates to a cutting tool system comprising a tool holder and a cutting tool. The tool holder includes a base for mounting onto a rotary drum or disc and a body for removably coupling to the cutting tool. The cutting tool is for size-reducing a material and has a first side and a second side. The cutting tool includes a plurality of cutting edges that are selectively moveable into and out of a cutting path of the rotary drum or disc. The first and second sides each have at least one cutting edge, such that each of the first and second sides are configured to be a leading side of the cutting tool during use. This allows the cutting tool to be rotated and / or reversed, such that a single cutting tool provides several cutting edges and increases the wear or erosion life thereof.

The invention relates to the technical field of machining, and particularly discloses a combined cutter which comprises a cutter handle, a center drill and end face milling cutters, the center drill is installed in the center of the cutter handle, and the end face milling cutters are distributed around the center drill and installed in a receding groove. The calibration device comprises a mounting base and a measuring mechanism, the measuring mechanism is provided with a clamping assembly, a positioning assembly and a calibration assembly, the combined tool is positioned and clamped, and calibration is carried out through a center hole standard block, a height conversion plate, a guide mechanism and a calibrator. Meanwhile, an end face calibration cushion block is further arranged and used for determining a scraping and milling plane of the combined cutter. The calibration method comprises the steps that the combined tool is placed in the positioning block and pressed tightly, the center drill makes contact with the center hole standard block to drive the height conversion plate to slide, the calibration instrument is used for measuring the moving distance and adjusting the installation position of the center drill, and the center drill is fixed to complete calibration. The combined tool and the calibration device and method have the advantages of being simple in structure, accurate in calibration, convenient to operate and the like, and are suitable for calibration of combined tools of various models.

In a processing machine, a machine body drives at least one of a workpiece and a tool to process the workpiece by the tool. A processing chamber isolates the workpiece, the tool, and a nozzle from at least part of the machine body while housing the workpiece, the tool, and the nozzle. An internal temperature sensor measures a temperature of an atmosphere in the processing chamber. An external temperature sensor measures a temperature of an atmosphere around the processing machine. A temperature adjustment part raises a temperature of the processing fluid to be supplied to the nozzle when a measured temperature of the internal temperature sensor is lower than a measured temperature of the external temperature sensor, and / or the temperature adjustment part lowers the temperature of the processing fluid to be supplied to the nozzle when the measured temperature of the internal temperature sensor is higher than the measured temperature of the external temperature sensor.

The disclosure relates to a milling tool for wood or wood-like materials, as well as a method for producing such a milling tool. A longitudinal direction, a radial direction and a rotational direction are specified by an axis of rotation of the milling tool. The milling tool includes a base body as well as at least one blade which adjoins a rake face pointing forward in the rotational direction and a flank face pointing outward in the radial direction. The blade and the rake face run in a curved manner in the longitudinal direction. The curved blade and the curved rake face are formed on a cutting plate formed separately from the base body. The cutting plate is fastened to and in particular soldered on with its flat inner surface on a flat support surface of the base body.

The invention discloses a milling cutter for processing a ceramic matrix composite material, a cutting edge comprises a wave-shaped cutting edge and a tooth-shaped cutting edge, the wave-shaped cutting edge and the tooth-shaped cutting edge are positioned on different edge sections and are alternately arranged, the waveform of the wave-shaped cutting edge is a sine curve waveform, and the sine curve waveform is periodically arranged along the axial direction of the milling cutter; chip separating grooves are periodically formed in the tooth-shaped cutting edge in the axial direction of the milling cutter at intervals, and the chip separating grooves correspond to wave crests and wave troughs of the sine curve waveform. The wave-shaped cutting edge is in a sine curve wave shape, so that the length of the cutting edge is increased, the load in unit length is reduced, the machining cutting force is effectively reduced, heat dissipation is accelerated, vibration and deformation are reduced, the tooth-shaped cutting edge is divided by the chip dividing grooves of the tooth-shaped cutting edge, and chip removal and heat dissipation are facilitated while cutting force distribution is optimized; and in the machining process, discontinuous parts are cut through the tooth-shaped cutting edges, machining is conducted through the wave crests or the wave troughs of the wave-shaped cutting edges, and the cutting service life of the cutter is long.

The invention relates to a master-slave multi-edge staggered tooth milling cutter structure with a reinforced shearing and cutting function. The milling cutter structure comprises a left-handed main cutting edge, a right-handed main cutting edge, a left-handed main chip groove, a right-handed main chip groove, left-handed micro teeth, a left-handed micro tooth slave edge, right-handed micro teeth, a right-handed micro tooth slave edge and other micro teeth. A micro-tooth slave edge is formed in a cutting edge strip of a traditional staggered-tooth cutter, and the micro-tooth slave edge and a main cutting edge alternately cut materials. When the cutter rotates, materials on the upper edge and the lower edge of a workpiece are sheared and cut in the strong constraint direction through the left rotating main cutting edge and the right rotating main cutting edge, a thermoplastic composite material with high toughness is extruded and deformed under the cutting action, and at the moment, a surface fiber back support is strengthened due to extrusion deformation. And the left-handed micro-tooth slave blade and the right-handed micro-tooth slave blade shear and remove the material which is not removed in the strong constraint direction again in a reciprocating and alternating manner, so that multiple times of reinforced shearing and cutting of the material are realized. The design is beneficial for removing materials in a surface layer weak constraint state, surface layer damage is inhibited, and low-damage milling of the thermoplastic composite material is realized.

To provide a coated cutting tool which is excellent in durability for an AlCrSi nitride having a large Si content and a microstructure, even if a content ratio of nitrogen is high.SOLUTION: A coated cutting tool has a hard film on a base material. The hard film is composed of a nitride or a carbonitride having 50 atom% or more and 70 atom% or less Al, 20 atom% or more and 50 atom% or less Cr, and 4 atom% or more and 15 atom% or less Si, with respect to a total amount of metal containing semimetal. As for the hard film, an atomic ratio (atom%) A of the metal element containing the semimetal and an atomic ratio (atom%) B of nitrogen satisfy a relation of 1.07<B / A<1.30. As for the hard film, in an intensity profile determined from an X-ray diffraction pattern or a limited field diffraction pattern of a transmission electron microscope, peak intensity caused by a (200) plane or a (111) plane of a cubic crystal indicates maximum intensity, and in the intensity profile determined from the limited field diffraction pattern, there is no peak mainly containing a hexagonal crystal.SELECTED DRAWING: None

The invention belongs to the technical field of gear machining, and discloses a gear milling blade and a disc-shaped milling cutter. The gear milling blade is installed on the end faces of the two sides of a milling cutter disc and comprises a top edge, a side edge and an auxiliary edge, and the top edge is arranged between the side edge and the auxiliary edge. The outer contour line of the top edge protrudes towards the workpiece to be machined, the outer contour line of the top edge comprises a top edge arc line and a Bezier curve, one end of the top edge arc line is connected with the outer contour line of the side edge, and the other end of the top edge arc line is an end point E; one end of the Bezier curve is connected with the end point E and is tangent to the end point E, and the other end of the Bezier curve is connected with the outer contour line of the auxiliary blade. The gear milling blade has the outline shape of a Bezier curve, and can effectively improve curvature distribution on a tooth root transition curve, increase the curvature radius of the tooth root transition curve and reduce tooth root stress when cutting a tooth groove, so that the tooth root strength of an involute gear is improved.

The invention discloses grinding equipment and a grinding method for metal cutting milling cutter machining, and relates to the technical field of grinding machine tools. The grinding equipment for metal cutting milling cutter machining comprises a grinding machine base, a spindle box is fixedly connected to the top of the grinding machine base, a chuck is movably connected to the right side of the spindle box, and a movable seat is movably connected to the position, located on the right side of the spindle box, of the top of the grinding machine base. According to the grinding equipment and the grinding method for metal cutting milling cutter machining, an air supply motor drives a spiral plate to rotate, so that the spiral plate continuously feeds external air into a splash guard through an air supply pipe, and air flow is formed to be blown to a diamond grinding wheel; and cooling liquid on the surface of the diamond grinding wheel and loose abrasive particles and chippings on the surface can be blown to the right side to be away from the surface of the diamond grinding wheel, so that the to-be-ground surface of the diamond grinding wheel is kept clean, the abrasive particles and chippings are prevented from participating in grinding to influence the surface quality of the milling cutter, and the machining efficiency is improved.

The invention provides an inner-cooling milling cutter which comprises a cutter handle, a cutting section, an inner-cooling hole and a side edge water outlet hole, the cutting section is connected with the cutter handle, the inner-cooling hole extends from one end, away from the cutting section, of the cutter handle to the interior of the cutter handle and extends into the cutting section, and the side edge water outlet hole is connected with the inner-cooling hole. The cutting section is provided with an axial end far away from the cutter handle, the end, located in the cutting section, of the inner cooling hole is not communicated with the axial end of the cutting section, the side blade water outlet hole is formed in the cutting section, one end of the side blade water outlet hole is communicated with the inner cooling hole, and the other end of the side blade water outlet hole is communicated with the cutter handle. And water can be discharged from the other end of the side blade water outlet hole in the direction of the cutter handle. According to the invention, the cooling liquid can be reversely discharged, so that the cutting edge part of the whole cutter participating in cutting can be fully cooled, the service life of the milling cutter is prolonged, and the production cost is reduced.

The invention belongs to the technical field of gear machining, and discloses a gear milling blade and a disc-shaped milling cutter. The tooth milling blade comprises a side edge, a top edge and an auxiliary edge, wherein the top edge is arranged between the side edge and the auxiliary edge; the outer contour line of the top edge protrudes towards the workpiece to be machined, the outer contour line of the top edge comprises a top edge arc line and an oval arc line, one end of the top edge arc line is connected with the outer contour line of the side edge, and the other end of the top edge arc line is an end point E; one end of the elliptic arc line is connected with the end point E and is tangent to the end point E, and the other end of the elliptic arc line is connected with the outer contour line of the auxiliary blade. The tooth milling blade is provided with an elliptical profile curve, so that the curvature distribution on a tooth root transition curve can be effectively improved, the curvature radius of the tooth root transition curve is increased and the tooth root stress is reduced when a tooth groove is cut, and thus the tooth root strength of an involute gear is improved; and meanwhile, the elliptic arc line and the top edge arc line are connected and tangent at the end point E, so that the outer contour line of the top edge is ensured to be smooth.

The invention relates to the technical field of machining, in particular to a multi-material combined deep hole machining method, a positioning block, a cutter and a part. Through rough machining of the bottom hole in the single-piece state, the difficulty of direct machining after multiple materials are combined is effectively reduced, the machining efficiency is improved, and the precision of the hole diameter is guaranteed. The roughly machined bottom holes of all the assembly parts are aligned and positioned, the deep holes to be machined are machined through a reaming milling cutter, and reamed holes are obtained; the axis deviation of the hole can be corrected, and an accurate reference is provided for subsequent machining. A reamer is used for machining a reamed hole, and a reamed hole milling cutter in a rear guiding mode is used for machining; deflection and vibration in the machining process are effectively restrained in the process, and the quality of machined holes is guaranteed. And the pre-machined deep hole is machined through a front guiding type reamer, so that the hole diameter of the pre-machined deep hole is enlarged to the target hole diameter, and machining of the multi-material combined deep hole is completed. The problems that in the prior art, machining precision is poor and efficiency is low in deep hole machining of various material combinations are solved.

The purpose of the present invention is to precisely process a surface-shaped portion having a fillet. An end mill includes a bottom blade having a protruding curved surface and formed in an arc shape, and a radius blade provided in a corner portion and formed in an arc shape, wherein the radius of the arc portion of the radius blade matches the radius of the arc portion of a fillet-shaped portion of a shape to be processed, and the radius of the arc portion of the bottom blade is equal to or smaller than the minimum radius of the arc portion of a surface-shaped portion adjacent to the fillet-shaped portion.

The purpose of the present invention is to perform machining on a double-curved surface to have good finished surface characteristics while achieving high speed feeding. An end mill (2) is provided with a bottom blade (2A) formed in a curved convex and circular arc shape, and a radius blade (2B) located at the edge and formed in a circular arc shape. The bottom blade (2A) has a region where a blade part is not formed on the axis of the end mill (2), and the end mill (2) is further provided with a center blade (2C) in the region of the bottom blade (2A). The center blade (2C) is formed in a circular arc shape with a radius smaller than that of the circular arc part of the bottom blade (2A).

The utility model belongs to the technical field of milling cutters, and discloses a carbon fiber drilling and milling cutter which comprises a cutter handle, a blade part and a tip part are arranged at the front end of the cutter handle, the blade part comprises a plurality of cutting blades arranged at intervals in the circumferential direction of the cutter handle, and a chip groove is formed between every two adjacent cutting blades. By arranging the blade part and the tip part and arranging the cutting edges and the chip grooves on the blade part, carbon fiber wire harnesses in a carbon fiber plate can be cut off more easily in the machining process through the cutting edges arranged at intervals, carbon fiber chips obtained after cutting can be discharged from the chip grooves, and therefore better hole quality can be obtained; and the device can also be used for side milling of a plate wall, and better planeness and roughness are achieved on the side face.

The invention discloses a pipeline butt joint welding seam surplus height grinding device and method, the grinding device comprises an electric control module, a vehicle body module and a milling and grinding device module, and the appearance of a main body of the grinding device is of a cuboid trolley structure with an n-shaped handheld handle on the upper portion; the vehicle body module comprises a vehicle body shell, a lifting hand wheel hole and a metal magnetic wheel; the electric control module is located on the upper portion of the vehicle body module and provides power for the grinding device and controls electrical equipment. The milling and grinding device module is located in a vehicle body shell of the vehicle body module and comprises a lifting hand wheel, a speed reducer, a motor, a frame body and a spiral milling cutter. The grinding device makes contact with a to-be-treated pipeline through the metal magnetic wheel, the position of the milling and grinding device module is controlled by rotating the lifting hand wheel, then the carry distance of the spiral milling cutter is controlled, and the purpose of milling and grinding the weld reinforcement is achieved. The device is compact in structure, convenient to carry, simple in structure, low in use and maintenance cost and easy to operate, and the grinding speed and quality are improved.

The utility model relates to the technical field of cutters, and discloses a layered chip milling cutter which comprises a cutter bar and four blades, four mounting stations are arranged at the front end of the cutter bar, and the four blades are fixedly mounted in the four mounting stations respectively; the four blades are triangular blade bodies, and the three edges of each blade are arranged in a protruding arc-shaped mode. The layered chip milling cutter structure is adopted, the utilization rate of the cutting edge of the hard alloy blade is improved, the chip milling service life of the blade is prolonged, and meanwhile the use cost is reduced.

The invention discloses a diamond cutter for forming a concave spherical surface microstructure, and relates to the technical field of machining of micro concave spherical surfaces in ultra-precision milling. The invention aims to solve the problems that a small-size spherical structure is difficult to process, the processing quality is difficult to guarantee, the size of a spherical curved surface is difficult to control, the surface contour quality of the curved surface is difficult to guarantee and the like in the milling process. According to the technical scheme, the shape of the diamond cutter in the manufacturing process is strictly controlled so that the cutter meeting the use requirement can be obtained. The laser cutting machine is used for preliminarily machining the contour of the cutter, small-size high-precision cutting can be achieved through laser cutting, the cutting efficiency is high, and the contour forming quality is good. And the diamond polishing liquid is used for polishing the cutting surface, and the roughness of the cutting surface is reduced. And fine grinding is carried out on the diamond relief angle, so that the tool is not interfered and influenced in the using process. The machining process of the cutting edge is divided into rough grinding and accurate grinding, rapid forming is achieved through rough grinding, sufficient allowance is reserved for accurate grinding of the cutting edge, and the contour precision and the shape quality of the cutting edge are extremely high through accurate grinding. After the diamond tool bit is preliminarily machined, the diamond tool bit and the hard alloy tool handle are welded together in a vacuum welding machine through brazing, then the cutting edge is machined, and it is guaranteed that the rotation center of the cutting edge is highly coaxial with the axis of the tool bar.

The utility model discloses a milling cutter convenient to replace, which relates to the technical field of milling cutters, and comprises a milling cutter body and a positioning mechanism, the positioning mechanism comprises a lifting sleeve sleeved on the outer wall of a mounting seat, the bottom of the inner wall of the lifting sleeve is provided with an extrusion circular truncated cone surface, and the outer wall of the mounting seat is provided with a plurality of movable holes; connecting rods are movably connected to the inner walls of the multiple movable holes in a penetrating and inserting mode, and contact mechanisms are arranged between the connecting rods and the milling cutter body. By means of the arrangement of the lifting sleeve, the extrusion circular truncated cone face, the movable hole and the connecting rod, the lifting sleeve moves downwards on the outer wall of the installation base, the extrusion circular truncated cone face extrudes the connecting rod, and therefore the multiple contact mechanisms move at the same time till the multiple contact mechanisms tightly abut against the milling cutter body; therefore, the milling cutter body can be kept coaxial with the mounting seat after being mounted, so that the milling cutter body cannot eccentrically rotate when the mounting seat rotates to drive the milling cutter body to work, and the mounting stability of the milling cutter body is improved.

The invention provides a preparation method of a wear-resistant and strength-coordinated hard alloy product. The method comprises the following steps: (1) hard phase pretreatment: mixing tungsten carbide powder with a yttrium-stabilized zirconia precursor solution; (2) nano coating modification: placing the mixed material in a planetary ball mill for ball milling to obtain yttrium-stabilized zirconium oxide coated tungsten carbide composite powder; (3) preparing a binding phase; (4) mixing and pressing; (5) performing gradient sintering to obtain a sintered body; and (6) the sintered body is placed in a vacuum furnace to be subjected to aftertreatment, and the wear-resistant and strength-coordinated hard alloy product is obtained. Through multi-dimensional innovation of material proportion innovation, process optimization and equipment improvement, the technical problems of traditional hard alloy in the aspects of hardness and toughness balance, high-temperature performance stability, production cost control and the like are successfully solved, and a hard alloy solution which is excellent in performance and economical and feasible is provided for the field of high-end equipment manufacturing.