278 results about "Cnc milling" patented technology

The utility model relates to the technical field of CNC gantry milling machines and discloses an easy-to-clean CNC gantry milling machine workbench, comprising a CNC milling machine body, a CNC gantry is arranged on the CNC milling machine body, a top side of the CNC milling machine body is provided with a plurality of strip grooves, two lifting grooves are arranged on both sides of the CNC gantry, lifting blocks are movably installed in the lifting grooves, an electric push rod is fixedly installed on the top inner wall of the lifting groove, the output end of the electric push rod is fixedly installed on the top side of the lifting block, and the same first scraper is installed on the two lifting blocks through a first elastic mechanism. The utility model achieves the effect of saving space by arranging a plurality of second scrapers and a first scraper that can be elastically telescopically adjusted on both sides of the CNC gantry, and the plurality of second scrapers and the first scraper are used to scrape the table top of the CNC milling machine body and the waste chips in the plurality of strip grooves through the movement of the CNC gantry.

The invention belongs to the technical field of milling, and particularly relates to a high-precision numerical control milling device which comprises a main body framework, a main shaft and a chuck, and further comprises a mounting shell fixedly mounted on the main body framework, the liquid spray head is mounted on the mounting shell; the injection detection assembly is mounted on the mounting shell and comprises a circular plate mounted on the mounting shell; the gas nozzle is mounted on the circular plate, a detection structure is arranged on the gas nozzle, and the detection structure comprises a pressure sensor; according to the invention, the tasks of detection and energy conservation are completed by using gas, and the cooling liquid is focused on the work of cooling and lubrication, so that the two defects of low cooling efficiency and resource waste in the prior art are overcome, and the multiple beneficial effects of prolonging the service life of the cutter and reducing the comprehensive cost are finally realized.

The invention provides a numerical control machine gear milling cutter fault diagnosis method and system based on continuous wavelet plate change and deep learning of multi-modal signal fusion, and relates to the field of numerical control gear milling cutter data monitoring and data fusion set fault detection. The method mainly comprises the steps that (1) an acceleration sensor and a noise sensor are adopted to collect vibration signals and sound signals of gradual abrasion in the working process of the tool respectively; 2) preprocessing each signal, and converting a one-dimensional signal into a two-dimensional image by adopting continuous wavelet transform to serve as an original sample set for fault diagnosis; 3) inputting the images of the two signals into a convolutional neural network to carry out time-frequency image feature extraction and multi-modal feature fusion; 4) dividing the fused features into a training set, a test set and a verification set according to 70%, 20% and 10%; and 5) carrying out model establishment, establishing a ConvNext model to carry out fault diagnosis on the data set, carrying out classification by adopting a softmax classifier, and identifying the tool wear state reflected by the multi-modal fusion signal. According to the method, the multi-mode sensor data is processed in an image processing mode, and the tool wear state can be reflected more effectively through feature fusion.

The invention relates to the technical field of numerical control milling machining and manufacturing, in particular to a welding barrel tapping and groove self-adaption machining method, system and device, and the method comprises the steps that based on an actual welding barrel, a simulation model of the welding barrel is built, and hole milling is conducted on the simulation model; the method comprises the steps that an actual to-be-machined hole and a peripheral contour area of the actual to-be-machined hole are scanned, point cloud data of the to-be-machined hole are obtained, a groove curved surface model is constructed based on the point cloud data, and a groove profiling machining tool path is generated according to the groove curved surface model; and the actual welding barrel is milled through the groove profiling machining tool path. By means of the method, errors in actual machining of holes and grooves of the welding barrel can be reduced, and the high-precision machining requirements of the grooves of different shapes and sizes are met.

The utility model relates to the technical field of CNC (Computer Numerical Control) clamps, and discloses a flexible CNC milling clamp which comprises a clamp body fixed on a CNC sliding table through a bolt, a plurality of front and rear round insertion holes are formed in the clamp body in a matrix manner, front and rear round rods are inserted in the front and rear round insertion holes in a front and rear sliding manner, and the front and rear round rods are fixed on the CNC sliding table through bolts. Wherein the front-section square rod part of the front-back round rod extends out of the clamp body and is used for clamping a workpiece, a reset spring is embedded in a round hole in the back end of the front-back round insertion hole, a clamp body angle hole is formed in the clamp body, and a cover plate angle hole is formed in the tail end cover plate covering the back end of the clamp body. When a special-shaped workpiece is clamped, a clamping face attached to the surface of the workpiece can be rapidly formed through the self-adaptive action of the front round rod and the rear round rod, and the locking plate can be moved by conveniently rotating the nut screwing handle so that the rubber embedded ring can clamp the front round rod and the rear round rod.

The invention provides a gantry numerical control milling machine high-precision curved surface machining method based on multi-axis linkage compensation, and belongs to the technical field of numerical control machining, and the gantry numerical control milling machine high-precision curved surface machining method comprises the steps of S1, constructing a gantry numerical control milling machine multi-axis error model, the method comprises the following steps: measuring positioning errors, reverse clearance errors and perpendicularity errors of all axes of a gantry numerical control milling machine and synchronous errors during multi-axis linkage through measuring equipment such as a laser interferometer and a ball bar, and establishing a comprehensive error model comprising geometric errors, thermal deformation errors and multi-axis linkage errors of a machine tool; according to high-precision curved surface machining of the gantry numerical control milling machine, the machining precision and efficiency are remarkably improved through multi-dimensional technical innovation. In the aspect of error processing, a comprehensive error model is constructed, various errors such as geometry, thermal deformation and multi-axis linkage are accurately covered, and a solid data foundation is provided for compensation; in the machining process, the error compensation amount is dynamically adjusted by combining curved surface gridding and layered milling with real-time feedback.

The invention relates to the technical field of hull valve machining, in particular to a hull valve multi-procedure integrated machining center which comprises a numerical control machine tool body, a connecting shell is fixedly connected to the rear end of the top of the numerical control machine tool body, and a numerical control milling device is arranged at the position, located in the connecting shell, of the top of the numerical control machine tool body. Compared with an existing integrated machining center, waste chips and waste gas generated in the milling process are effectively collected, the cleanliness of the working environment is kept, the machining efficiency and the machining quality are improved, the machining cost is reduced, and the machining efficiency and the machining quality are improved. According to the invention, damage of waste chips to equipment and workpieces is avoided, harmful substances in waste gas are effectively removed, the environment-friendly emission standard is reached, the overall practicability and the environment-friendly performance of the equipment are improved, stable clamping of cylindrical materials is realized, loosening or deviation in the machining process is prevented, the machining precision and efficiency are improved, and the production cost is reduced. And the processing quality is ensured.

The invention provides a font processing technology which comprises the following steps: S1, designing a combined electrode according to the shape of a cavity on a mold core: the combined electrode comprises a first electrode and a second electrode, the first electrode is provided with a font appearance electrode, the font appearance electrode is designed corresponding to a font, and a plurality of sharp corner processing parts are reserved at sharp corner positions of the font; a sharp corner electrode is arranged on the second electrode and is used for removing the sharp corner processing part and forming a font sharp corner; s2, a combined electrode is machined, specifically, a proper carving knife is selected to conduct CNC milling machining on the combined electrode; s3, first-time electric discharge machining is conducted, specifically, a first electrode is used for conducting first-time electric discharge machining on the mold core, and primarily-machined characters are obtained; and S4, second-time electric discharge machining is conducted, specifically, a second electrode is used for conducting second-time electric discharge machining on the mold core, font sharp corners are formed, and final fonts are obtained. The font sharp corner position is split and avoided, complementary machining is conducted through the combined electrode, font sharp corners can be formed, and the appearance quality of products is guaranteed.

The invention discloses a method for machining a deep blind groove in a titanium alloy bearing seat, which comprises the following steps of: S1, performing large-allowance roughing on a part by adopting numerical control milling so as to form a U-shaped groove in the part; s2, on the basis of the electromachining equipment expert database, a first electric gauge is given according to related size requirements of the part material, the electrode material and the deep blind groove, so that a first electromachining main parameter is obtained from the electromachining equipment expert database according to the first electric gauge; s3, the first electromachining main parameters and the graphite electrode are adopted for conducting electric spark rough machining on the U-shaped groove in the radial direction, so that a square groove is formed in the part; s4, on the basis of the electromachining equipment expert database, a second electric gauge is given according to the relevant size requirements of the part material, the electrode material and the deep blind groove, so that a second electromachining main parameter is obtained from the electromachining equipment expert database according to the second electric gauge; and S5, carrying out translational equal-allowance electric spark finish machining on the square groove by adopting a second electromachining main parameter and a graphite electrode so as to form a deep blind groove with a set size on the part.

A method for controlling deformation of a titanium alloy slender edge strip part during CNC milling. The part is composed of a slender edge plate and a web plate, and has an L-shaped cross-section. There are transverse ribs between the inner edge plate and the web plate of the part. The web plate is a planar structure. The part is processed from a rectangular blank. The processing process includes process planning, a rough processing stage, a heat treatment stage, a semi-finishing stage, and a finishing stage. The left and right parts are symmetrically arranged in parallel on a piece of raw material. A slender "I"-shaped process connecting rib is provided between the left and right parts. A plurality of stress grooves are transversely processed on the vertical ribs of the process connecting ribs. A detection hole is made in the middle of the vertical ribs of the process connecting ribs. After the finishing is completed, the process connecting ribs around the part are milled in sections, and finally the process connecting ribs are cut off and removed by a fitter.

The invention discloses a frequency duplex synthesis method for realizing a terahertz ultra-wideband frequency multiplier, and relates to the technical field of submillimeter wave / terahertz solid-state frequency multipliers, a'frequency division-frequency multiplication-frequency combination 'duplex circuit architecture is adopted, a frequency division circuit and a frequency combination circuit are both based on a hybrid network type waveguide duplexer design, and the frequency division-frequency multiplication-frequency combination duplex circuit design is adopted. The frequency multiplier circuit is realized by adopting a hybrid integrated frequency doubler, the cost is low, the cavity structure is completely processed by adopting a CNC milling process, and the solid-state characteristic is realized; therefore, under the condition that the frequency doubling / frequency conversion efficiency is not reduced, the frequency doubler capable of covering the full frequency band of 170-260GHz (WR-4 frequency band) can be realized, namely, the double advantages of wide frequency band and high efficiency of the frequency doubler are considered, and the technical problem that the wide frequency band and the high efficiency of a submillimeter wave / terahertz schottky frequency doubler at the present stage cannot be achieved at the same time is solved.

The utility model relates to the technical field of powder discharging groove machining, in particular to a drill bit powder discharging groove machining device which comprises a numerical control milling machine and a rotary table chuck arranged on a workbench of the numerical control milling machine. The rotary table chuck comprises a supporting table detachably connected to a numerical control milling machine workbench, a chuck transversely and rotationally connected into the supporting table, a plurality of clamping jaws arranged at one end of the chuck in a sliding mode, a first driving part arranged on the supporting table and a second driving part arranged on the chuck, and the first driving part is in transmission connection with the chuck to drive the chuck to rotate. And the second driving piece is in transmission connection with the multiple clamping jaws to drive the multiple clamping jaws to get close to or get away from each other. The second driving piece on the rotary table chuck drives the multiple clamping jaws to be close to or away from each other synchronously, accurate adjustment can be conducted according to the size of a drill bit, rock drilling drill bits of different specifications can be stably clamped, it is guaranteed that the drill bit does not shake in the machining process, the machining precision of a powder discharging groove is improved, and the product quality is guaranteed.

The present invention discloses a device for group processing of locking block grooves of synchronizer gear holder parts on a CNC milling machine. The device comprises a positioning mechanism mounted on a rotary table of a machine tool indexing head, a clamping mechanism slidably connected to the cylinder body of the machine tool and connected to a piston rod, and a gear alignment mechanism disposed on the positioning mechanism. The positioning mechanism comprises a connector connected to the rotary table of the machine tool indexing head, the end of the connector being connected to a mandrel concentric with the machine tool indexing head turntable for receiving multiple groups of gear holders. One end of the mandrel connected to the machine tool indexing head is radially protruding and provided with a shoulder for supporting the end face of the gear holder. The clamping mechanism comprises a rotatable pressure pad for supporting the end face of the gear holder and rotating with the positioning mechanism. The gear alignment mechanism comprises an aligner for axially positioning the gear holder, the aligner being provided with a wedge-shaped ridge that can be pressed into the tooth groove of the gear holder. The reliable structural design satisfies the functions of single-clamping and group processing of gear holder locking block grooves on a CNC milling machine, while improving positioning accuracy.

This invention discloses a digital complete denture manufacturing method and a digital complete denture, relating to the field of digital oral technology. The invention acquires digital models of the patient's edentulous maxilla and mandible, along with jaw position data. Virtual tooth arrangement and denture base design are completed in computer-aided design software, generating a composite digital model. The base data is converted into CNC instructions, and a five-axis CNC milling machine is used to cut prefabricated material blocks to produce a solid denture base. Matching solid prefabricated dentitions are selected from a prefabricated dentition database, surface-activated, and then bonded and fixed to complete the denture assembly. This method is highly efficient, provides stable precision, and significantly shortens the manufacturing cycle and the number of treatment visits.

The invention relates to a forming processing method of a copper PCB substrate, and relates to the field of PCB manufacturing. According to the technical scheme, a machining drawing is designed according to product requirements; on the basis of the machining drawing, a CNC machining feeding program is designed; according to the cutter diameter in the CNC machining feeding program, designing a drilling and milling cutter with both milling and drilling; a main shaft controller of the CNC milling machine is designed to be in a clockwise rotation mode and an anticlockwise rotation mode, and the rotation direction of a main shaft corresponds to a rotation direction instruction in the CNC machining feeding program; and a to-be-machined copper block is clamped and positioned, the CNC machining feeding program is started, and forming machining of the copper PCB substrate is completed. Under the condition, the technical difficulties of copper warping, deformation and wiredrawing in the copper PCB substrate forming processing process are solved, and the process special for forming processing of the copper PCB substrate is formed by designing a drilling and milling cutter integrating milling cutting and drilling cutting and designing a corresponding processing program and flow.

The utility model discloses a novel VEGA reader-writer, which relates to the technical field of reader-writers and comprises a shell, a communication interface module, a power supply module and an RF (Radio Frequency) module, the shell is of a flat thickened structure formed by aluminum alloy integrated CNC milling. The communication interface module comprises an RS232 serial port of a DB9 female head, an M12-5pin aviation male head interface and a BT radio frequency port; the power supply module supports 9-36V wide-range power supply, and the operation power consumption of the whole machine is less than or equal to 10W. According to the device, the aluminum alloy integrated CNC milling flat thickened shell is adopted, the occupied space is small, collision and friction resistance is achieved, the protection grade is not lower than IP67, the requirement for additional supporting and protection structures during installation is reduced, and the device is suitable for various complex installation scenes.

The present invention discloses a tool for gluing special-shaped complex curved surfaces and a processing method thereof, comprising a tool body for supporting parts and a clamping member for fixing parts; the tool body comprises a plurality of horizontal petals, the plurality of horizontal petals are distributed hierarchically from top to bottom, and two adjacent horizontal petals are fixedly connected; the horizontal petals comprise an arc portion and a straight portion, and the arc portion and the straight portion are fixedly connected. The tool of the present invention is processed in steps, and independent arc portions and straight portions are obtained by CNC milling. The tool body is formed by two assembly processes. When the horizontal petals are assembled to form the tool body, the assembly process of each layer of horizontal petals is carried out on the same reference plane, which can reduce the error of the forming process; the split processing and then welding forming can reduce the processing difficulty of the tool body and save materials at the same time.

The utility model belongs to the technical field of numerical control machine tools, and discloses an automatic feeding device for a numerical control milling machine, the automatic feeding device comprises a conveying assembly, a material storage box and a lifting assembly, the conveying assembly comprises a conveying belt, a flow guide plate, a flow distribution plate and a flow distribution driving piece, the flow guide plate is arranged above the conveying belt and divides the conveying belt into at least two conveying channels, the flow dividing plate is hinged to the flow guide plate, the flow dividing driving piece is connected with the flow dividing plate to drive the flow dividing plate to swing in the conveying channels, the material storage box is arranged on one side of the conveying assembly, and the flow dividing driving piece is connected with the flow dividing plate to drive the flow dividing plate to swing in the conveying channels. One end of the lifting assembly is located in the material storage box, and the other end of the lifting assembly is close to the conveying belt so as to lift the parts in the material storage box to the conveying belt. According to the technical scheme, the effect of automatically conveying the parts can be achieved, operators can conveniently take the parts from the conveying belt for machining, and the part machining efficiency is improved.

The utility model relates to the technical field of CNC milling machines, and proposes a milling machine capable of multi-directional processing operations for rubber roller coating, comprising a bottom shell and a front frame, wherein the front frame is arranged at the upper end of the bottom shell, the mounting and adjusting components are arranged inside the bottom shell and the front frame, the collecting component is arranged on the front frame, the mounting head is arranged at the upper end of the front frame, the blade is arranged inside the front frame, the collecting cover is fixed on the side surface of the front frame, a pair of rotating rollers are rotatably connected in the collecting cover, a driving motor is arranged on the side surface of the collecting cover, and the output end of the driving motor is connected to one side of the rotating roller. Through the above technical scheme, the existing CNC milling machine for rubber roller processing in the related technology is solved. During the specific use process, the waste chips generated in the cutting process will be pulled into filaments, and the filamentary waste chips will be wrapped around the tool, affecting the normal operation of the tool, requiring the staff to stop the machine for cleaning, which is very inconvenient to use, not conducive to continuous processing, affecting production efficiency, and greatly reducing the practicality of the device.

The invention relates to the field of numerical control milling machines, in particular to a three-gantry drilling and milling machining center which comprises a lathe bed, a drilling frame moving in the length direction of the lathe bed and a milling box frame. The periphery of the drilling frame is slidably sleeved with a gang drill device, the gang drill device comprises a gang drill frame and a gang drill assembly, the gang drill assembly is arranged on the gang drill frame, and the gang drill assembly can control the machining position of the gang drill assembly; a milling device is arranged in the center of the milling box frame in a sliding and penetrating mode, the milling device comprises a milling box body and a milling assembly, the milling assembly is arranged on the milling box body, and the milling assembly can control the machining position of the milling assembly; the drilling frame is arranged to be of a frame-in-frame structure, so that the ventilation space of the drilling frame is larger, the heat dissipation effect is effectively improved, the machining precision is guaranteed, the gang drill device and the drilling frame are combined for use, four machining faces of a workpiece to be machined are machined at the same time, the machining speed is increased, meanwhile, stress on the two sides of the drilling frame is balanced, and the machining efficiency is improved. And the drilling frame is more stable in the machining process.

The utility model discloses an appearance positioning four-axis rotation fine-tuning matching clamp, which belongs to the technical field of clamps and comprises a bottom plate mounted on a numerical control milling machine, and two first positioning and clamping components used for positioning and clamping a first part to facilitate machining are mounted on the bottom plate. The bottom plate is provided with a second positioning and clamping assembly used for positioning and clamping the first part so that the first part and the second part can be machined conveniently. The second positioning and clamping assembly is located on the right side of the first positioning and clamping assembly. By means of the mode, under the condition that the bottom face is a blank face and has precision errors, the angle of the machining face of the first part is adjusted through four-axis rotation of the numerical control milling machine, machining precision is guaranteed, and reliable and stable product installation is guaranteed.

The utility model discloses a multi-station numerical control milling processing clamp which comprises a mounting base, a linkage unit, a power unit and a plurality of clamp bodies, the linkage unit, the power unit and the plurality of clamp bodies are all arranged on the mounting base, the power unit is connected with the plurality of clamp bodies through the linkage unit, and the power unit is connected with the plurality of clamp bodies through the linkage unit. Each clamp body comprises two clamping jaws which are symmetrically arranged, one end of each clamping jaw is a wedge-shaped part, and a channel is formed between the wedge-shaped parts of the two clamping jaws in the same group; a retraction spring is arranged between the two clamping jaws, and when the two clamping jaws are opened, the retraction spring is in a stretched state. According to the clamp, linkage of the multiple clamp bodies is achieved, the machining efficiency can be effectively improved, loosening or clamping of the clamping jaws within a certain range is achieved through cooperation of the rolling wheels and the wedge-shaped limiting blocks, tensioning is achieved through the retraction springs, clamping is stable and reliable, the clamp is suitable for milling machining of revolving body type parts of different specifications, overall operation is simple, and the machining efficiency is high. And an operator can process and use conveniently.

The invention relates to a method for precisely machining a ZTA15M complex casting, and belongs to the field of numerical control machining. The process is completed by improving a clamping form and a machining strategy in the casting machining process of numerical control milling equipment. The casting has three types of areas: a high-precision assembly area, a weak-rigidity non-assembly area and other areas. Processing areas of the casting are divided, a processing flow is formulated, different to-be-processed areas are determined, an overall processing station is determined, and the to-be-processed areas of the complex casting are distributed to all stations according to the stroke capacity of equipment; based on blue light scanning data of the casting, a structural area with the actual allowance smaller than the theoretical allowance by more than 50% is screened to serve as a follow-up allowance coordination comparison object; a positioning state detection tool is installed, the position of the ZTA15M complex casting is detected, and positioning detection is conducted; and processing the third, second and first types of areas in sequence, if the areas comprise a plurality of dispersed areas, processing according to the relative rigidities of the dispersed areas from strong to weak.

The invention belongs to the field of five-axis numerical control milling, and discloses a five-axis side milling test piece contour error prediction method considering a tool pose. Comprising the following four steps: establishing a spatial position transformation relation calculation model, calculating the length of a focusing tool and acquiring a track point set, fitting an intelligent algorithm optimized track, calculating a cutting contact track and solving a contour error, and substituting a tool path code of a five-axis side milling machining inspection test piece into a spatial error model considering the tool length. The method comprises the following steps: calculating cutter center point pose data corresponding to the contour of a cutting test piece, carrying out trajectory fitting on the pose data by introducing a spline curve fitting method, improving the precision of the fitting trajectory in combination with a particle swarm optimization algorithm, and finally shifting the cutter along the radius through a homogeneous coordinate transformation method to obtain an actual cutting contact trajectory of the test piece. And high-precision rapid prediction of the contour error of the five-axis machining test piece is realized.

The utility model relates to a CNC precious metal milling machine which comprises a base provided with a first sliding rail extending in the first direction; the supporting base is arranged on the first sliding rail, can slide in the first direction and is provided with a second sliding rail and a third sliding rail which extend in the second direction perpendicular to the first direction; the milling head mechanism is supported on the second sliding rail and the third sliding rail, and a milling head faces to machine precious metal; wherein the direction perpendicular to the first direction and the second direction is marked as a third direction; the supporting base comprises a base plate connected with the first sliding rail, first supporting arms embedded into the base plate in the first direction, second supporting arms embedded into the base plate in the second direction and connected with the first supporting arms in a clamped mode, a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are connected between the two second supporting arms, and the second sliding rail is arranged on the first supporting rod. The third sliding rail is arranged on the second supporting rod, the top face of the second sliding rail faces the first direction, and the top face of the third sliding rail faces the third direction, so that stable supporting is provided for transmission of the milling head mechanism, and the machining precision is guaranteed.

The utility model relates to a groove type partition combined cooling structure suitable for a high-speed motor. The groove type partition combined cooling structure comprises a lower shell assembly, an upper shell assembly and a motor installed in the lower shell assembly. The lower shell assembly comprises a lower shell, and a lower shell partition piece is installed in at least one lower shell groove-shaped flow channel and divides the lower shell groove-shaped flow channel into two areas communicating with each other. A plurality of upper shell groove-shaped flow channels matched with the lower shell groove-shaped flow channels are formed in the upper shell groove in the circumferential direction. The groove-shaped flow channel of the shell can be machined through conventional numerical control milling and is suitable for rapid iteration and small-batch customization, an internal complex cavity is omitted, and the manufacturing cost is remarkably reduced.

This invention discloses a five-axis, five-linkage CNC milling machine, including a machine body. Mounting seats are fixedly connected to the left and right sides of the top of the machine body. A worktable is disposed above the mounting seats, and a support seat is fixedly installed on the rear top of the machine body. Through the coordinated use of a first fixing mechanism, a tool storage mechanism, and a disassembly mechanism, and under the action of the output ends of a second stepper motor and a servo motor, the milling cutter to be replaced is positioned inside an empty placement slot on the storage disk. Then, a magnet abuts against a third sliding seat made of plastic, causing the milling cutter to fall into the placement slot. Similarly, the first fixing mechanism automatically installs the new milling cutter, which is convenient and quick. In addition, this invention also includes a tilting mechanism to facilitate cleaning of the T-slot on the top of the worktable by the operator, and a second fixing mechanism to select a suitable fixture for installation according to the product to be milled, meeting the needs of the operator.

The utility model provides a numerical control milling machine cooling liquid filtering device which comprises a filtering box, a feeding pipe is arranged at the left end of the filtering box, a discharging pipe is arranged at the right end of the filtering box, a mounting frame is arranged in the filtering box, a filter screen is detachably arranged in the mounting frame, and a fixing assembly used for fixing the filter screen is arranged at the upper end of the right side of the mounting frame. A filter screen is arranged in the filter box, a cover plate is rotatably connected to the upper end of the filter box, a handle is fixedly arranged at the upper end of the cover plate, and a cleaning assembly used for cleaning the filter screen is arranged at the left end of the mounting frame. According to the cooling liquid filtering device, impurities such as metal chippings in cooling liquid can be filtered, impurities deposited on the filter screen can be cleaned through the cleaning assembly, the circulation effect of the cooling liquid is prevented from being affected, and the filtering efficiency is improved.

An example milling bit comprises a shank and a working sector comprising a cutting anterior part, which is a portion of a hollow sphere, a cutting posterior part fixed to the shank and located between the shank and the spherical anterior part, at least one cutting tooth extending along an entire length of the working sector with a cutting edge, and at least one flute to the cutting tooth extending along length of the working sector following the path of the cutting edge. The spherical anterior part of the working sector is hollow and at least one cutting tooth in the anterior cavity region has a shape of a spherical shell element.

The machining method comprises the following steps that a disc type tooth-shaped milling cutter is adopted to be fixed to a machine tool spindle, and a gear blank is installed on a device capable of dividing teeth and rotating at a certain angle; the disc-type tooth-shaped milling cutter does linear motion and rotary motion at the same time, the linear motion speed of the disc-type tooth-shaped milling cutter is set to v1, the angular speed at the gear milling pitch circle of the gear blank is converted into the linear speed, namely, the pitch circle linear speed of the gear blank is v2, and the v1 and the v2 are the same in direction and equal in speed; and the arc involute tooth-shaped structure with the symmetrical middle position is obtained. The middle-position arc cylindrical gear can replace herringbone teeth, is good in manufacturability and low in manufacturing cost, can be transformed through numerical control milling equipment, is more stable and lower in noise compared with a cylindrical gear, and meanwhile, the number of meshed teeth is larger.