110results about How to "Improve shape and position accuracy" patented technology

The invention provides a machining method of a rolling bearing formed by whole and precise hard turning and molding of a sleeve ring. The machining method is characterized by comprising the following steps: after quenching and annealing heat treatment of the sleeve ring, carrying out the whole and precise hard turning and molding; and then combining and assembling a rolling body, wherein a sleeve ring rolling path comprises a fixed-curvature-groove-shape rolling path, a non-groove-shaped rolling path, a variable-curvature-shaped rolling path and a non-groove-shaped rolling path according to section shapes. The machining method disclosed by the invention overcomes the defects in the prior art that (1) performance defects on a machining surface, including grinding burn, a grinding metamorphic layer, grinding tensile stress, abrasive particle adhesion, scratches and the like, are caused by grinding and molding the sleeve ring; (2) shape defects on the machining surface that mutual position precision of all parts is not high, the shape of the rolling path cannot be accurately guaranteed and the like, are caused by carrying out a plurality of times of machining on different surfaces, even the same surface; (3) the defects that large investment of equipment, a tool clamp and personnel, and high machining cost are caused; and (4) the defects that a cutting solution needs to be used and the machining method is not environment-friendly enough are caused. The invention provides an anti-fatigue and green machining method which has the very great engineering actual meanings.

The invention relates to a micro-blanking forming device and a forming method, in particular to a high-frequency auxiliary micro-blanking forming device and a method for a foil plate. The device and the method aim at solving the problems in the existing high-precision blanking forming of the foil plate that an interval between a female die and a male die is small, a blanking force is significantly increased by a size effect, and the dies are badly worn and have short service lives. The device comprises a female die fixing plate, a lower bolster and a lower die plate that are sequentially connected from the top down, wherein an upper die plate and a male die fixing plate are sequentially arranged above the female die fixing plate; a female die is embedded into the middle part of the upper surface of the female die fixing plate; a vibration component and a punch are sequentially mounted in the male die fixing plate from the top down in an inserting manner; a middle line of the punch is coincided with that of the female die; the vibration component is connected with a high-frequency power source; a guide sleeve is mounted on the upper surface of the female die fixing plate in an inserting manner; the upper end of a guide column is mounted in the male die fixing plate in an inserting manner; and the lower end of the guide column is mounted in the guide sleeve in an inserting manner. The device and the method are used for blanking forming of the foil plate.

The invention discloses an all-welded ultra thin-walled storage tank and a welding structure suitable for all welding. The all-welded ultra thin-walled storage tank comprises a front bottom (1), a cylinder segment (2) and a rear bottom (3). The welding structure comprises a lock bottom (5), a reinforcing boss (6) and a middle connection structure (7). The welding structure is connected with the cylinder segment (2) through the middle connection structure (7). The front bottom (1) comprises a front bottom welding edge (9) or the rear bottom (3) comprises a rear bottom welding edge (9). The welding edge (9) and the middle connection structure (7) are connected through electron beam welding. According to the all-welded ultra thin-walled storage tank and the welding structure suitable for allwelding, the technical effects that the welding process is simplified, the welding quality is improved, the sealing level reaches the limit and the storage box wall is ultra thin are achieved, and thetechnical purpose of designing the storage box with the leak rate reaches the limit is achieved.

The invention discloses an assembling jig used in an armature component of an electrohydraulic servo valve. The armature component consists of a baffle feedback rod, a tubular spring with a shaft shoulder and an armature; the assembling jig comprises a mounting base, two left and right blocks, a positioning shaft and two first positioning pins used for guiding the tubular spring, a baffle positioning sleeve, a locknut and two second positioning pins used for positioning the armature. The assembling jig used in the armature component of the electrohydraulic servo valve of the invention is adopted, namely,, by virtue of the left and right blocks, a positioning hole on the positioning shaft, the positioning pins of the tubular spring and the positioning pins of the armature, the assembling jig can accurately position the working directions of a baffle surface of a baffle feedback rod, a mounting hole of the tubular spring and the armature, thus realizing comparatively high the accuracy of form and position. The assembling jig can realize parallelism of the work plane of the armature and the bottom face of the tubular spring and also can realize the larger magnitude of interference and the reliability of assembly when in use.

A self-centering synchronous clamping device for silicon rods, wherein the self-centering positioning clamping unit group includes a moving guide seat, a clamping oil cylinder, an upper clamping seat slide plate, a lower clamping seat slider, gears, and a lower V-shaped block And the upper V-shaped block, the upper clamping seat slide plate and the lower clamping seat slide block are set on the vertical guide rail of the moving guide seat, the gear is installed on the moving guide seat, and the gear is simultaneously connected with the rack on the upper clamping seat slide plate Side A meshes with rack side B on the slider of the lower clamping seat, the lower V-shaped block is installed on the slider of the lower clamping seat, the upper V-shaped block is installed on the sliding plate of the upper clamping seat, and the lower V-shaped block and the upper The symmetry line of the V-shaped supporting surface of the V-shaped block is on the same straight line, and the two are symmetrically distributed; the upper clamping seat slide plate and the lower clamping seat slide block are driven by the clamping oil cylinder. Its function is to accurately locate and pre-clamp the silicon rod segment, and provide accurate positioning for the final clamping of the pressing device.

The invention relates to a numerical control milling method for micro threaded holes of titanium alloy. The method comprises the specific machining operation steps of replacing a traditional manual tapping method for the titanium alloy with numerical control machining to improve the quality and efficiency of threads, selecting a threaded tool made of hard alloy to ensure high efficiency and batch production of part machining, and selecting a reasonable technical machining method to ensure specification consistency of the threads, circumferential stress uniformity during threaded milling and prevent the tool from being broken. The numerical control milling method is suitable for the micro threaded holes, with the machining range smaller than M3 and the length-diameter ratio higher than 2.5, of the titanium alloy, and the bottleneck problem of tapping of the micro threaded holes, with the large-length-diameter ratio, of the titanium alloy is solved successfully. Meanwhile, drilling and tapping are completed jointly, efficiency is improved by 6-8 times, the grade of precision of the threads of the holes and specification consistency of the threaded holes are improved, and the machining requirement for high precision of titanium alloy parts can be met.

The invention relates to a method for machining a steam (gas) turbine honeycomb seal with electric sparks. The method comprises the following steps of: manufacturing a tool electrode of which the contour line of the working surface is consistent with the section line of the inner arc surface of a honeycomb band of a honeycomb seal; laying the honeycomb seal on side on a work bench of an electrical discharge machine, aligning, centering and fixing; installing the tool electrode on a main shaft of the electrical discharge machine with the working surface of the tool electrode corresponding to the inner arc surface of the honeycomb band, adjusting the discharging gap, starting the machine to feed the tool electrode along the circumferential direction of the inner arc surface of the honeycomb band, carrying out electro-erosion machining on the inner arc surface of the honeycomb band, and removing chips by radial reciprocating movement when the tool electrode is fed along the circumferential direction. The method for machining a steam turbine honeycomb seal has high accuracy and can enable the contour of the machined working surface of the honeycomb band to be circularly machined. After the seal is assembled into a circle, the steam leakage gap is machined at one time, thereby realizing high efficiency. Besides, the tool electrode has the advantages of small geometric size, little material, simple structure, easy machining and low cost.

Disclosed are a method for welding special-shaped flange pipelines and a welding tool. The method includes steps: firstly, assembling in a three-dimensional analog manner by the aid of software; secondly, deriving a manufacturing drawing of a special-shaped flange pipeline according to a three-dimensional model; thirdly, manufacturing various parts of a workpiece according to the drawing of the special-shaped flange pipeline; and fourthly, determining a three-dimensional position of a flange plate by the aid of the welding tool on the basis of another flange plate, and connecting the parts of the pipeline. Accordingly, the special-shaped flange pipeline is accurately welded. The method for welding the special-shaped flange pipelines and the welding tool have the advantages that the accuracy of the shape and the position of a waste gas outlet pipe of a supercharger of a diesel engine, namely the special-shaped flange pipeline, can be ensured, accordingly mounting precision of later-stage assembly is guaranteed, and the special-shaped flange pipeline is directly assembled. In addition, owing to the high accuracy of the appearance and the shape of the special-shaped flange pipeline, the method and the welding tool are also applicable to batch production of multiple parts, and production efficiency is enhanced.

The invention discloses a novel single-spindle pentahedron machining CNC milling machine, belongs to the field of numerically-controlled machine tools and relates to pentahedron machining tools. The novel single-spindle pentahedron machining CNC milling machine comprises a lathe bed, a stand column, a horizontal feeding system and a vertical feeding system. The vertical feeding system is connected with a spindle in a 360-degree rotating mode through a spindle indexing device. The horizontal feeding system is connected with a workbench indexing device in a 360-degree rotating mode. According to the novel single-spindle pentahedron machining CNC milling machine, a single-spindle pentahedron can be machined; meanwhile, machining transmission precision and indexing accuracy are improved, the machining range is widened, machining efficiency is improved and the machining cost is lowered.

The invention discloses an ultrasonic vibration pneumatic drill based on rotary type wireless electric power transmission. The ultrasonic vibration pneumatic drill comprises a rotary wireless electric power transmission assembly, an ultrasonic transduction assembly, an amplitude-change pole, a spring chuck assembly and a connecting assembly, wherein the rotary wireless electric power transmission assembly is used for realizing electric power transmission between two mechanisms rotating oppositely and comprises a wireless electric power transmission primary unit and a wireless electric power transmission secondary unit; the ultrasonic transduction assembly is used for converting ultrasonic-frequency electric signals into ultrasonic-frequency mechanical vibration; the ultrasonic vibration amplitude-change pole is used for amplifying small-amplitude mechanical vibration into large-amplitude mechanical vibration to meet requirements of ultrasonic vibration drilling machining; the spring chuck assembly is used for clamping tools; the connecting assembly is used for connecting ultrasonic vibration drilling parts with the rear end of the pneumatic drill so as to realize power transfer and electric power transmission. Ultrasonic vibration is applied to the traditional drilling machining process, and a combined machining mode of coupling of ultrasonic vibration and traditional drilling motion is formed, so that machining quality is effectively improved and machining efficiency is improved.

The invention relates to a mold manufacture method, in particular to a method for manufacturing a space complicated curve surface core box mold, which is applicable to ship support frames of deep water drilling ships and ocean exploration ships and is characterized in that the method comprises the following steps of: selecting materials, building a mold three-dimensional space model, manufacturing a main carrying steel frame, manufacturing a mold blank, processing the mold and carrying out mold detection. The method has the advantages that the method is unique, the intensity is high, the manufacture efficiency is high, the precision requirement of customers is met, the mold quality is improved, and in addition, the method is applicable to the ship support frames of the deep water drilling ships and the ocean exploration ships.

The invention discloses a method for laminating multiple core assemblies of a shell casting chaplet at intervals, belonging to the field of casting technology. The method comprises the following steps of: combining a 1# sand core between a broken suspension core and a 1# sand core body with a conformal chaplet; preparing the shape of a casting mould, and positioning and limiting the 1# sand core and 3# sand core downwards to the casting mould through a lower core print and an end core print; placing two combination chaplets, two upper left combination chaplets and two upper right combination chaplets at a corresponding part combining the 1# sand core and a 2# sand core; placing a combination chaplet at a corresponding part combining the 2# sand core and the 3# sand core; and placing the 2# sand core to finish the lamination of core assemblies. Through the method disclosed by the invention, the casting process of the product is simplified, the technological complexity level of the product is reduced, the dimensional accuracy and accuracy of form and position of the product are improved, the problems of core folding, core suspension and the like of the product are solved, the yield of the product is increased, the production efficiency of the product is improved, the production cost is lowered, and the market competitiveness of the product is enhanced.

The invention relates to a central supporting bearing of an external boring machine. The central supporting bearing comprises a bearing shell (1), wherein four pairs of worm and gear mechanisms are uniformly placed on the bearing shell (1) in a circumferential direction; each worm and gear mechanism comprises a flange plate (3) and a Hough flange (4); the flange plates (3) are fixedly connected with the bearing shell (1); the Hough flanges (4) are fixedly connected with the flange plates (3); central frame worm wheels (5) are arranged between the flange plates (3) and the Hough flanges (4); two worm brackets (14) are arranged on one sides of the flange plates (3); a worm (15) is arranged between the two worm brackets (14); and apexes (9) are threaded in the middle of the central frame worm wheels (5). Through the adoption of the central supporting bearing of the external boring machine provided by the invention, dead weight deformation and supporting problems of a boring rod in the shafting boring process are solved, a better use effect is obtained in the shafting boring process, the rigidity of the boring machine is enhanced, the accuracies of form and position of boring are enhanced and the machining quality is guaranteed.

The invention discloses a precision machining method for blind holes of an oil cylinder piston. The precision machining method for the blind holes of the oil cylinder piston comprises the following steps: (1) conducting rough machining on a big piston blind hole till specification of the blind hole reaches 67mm in diameter Phi and 195mm in depth; (2) conducting predrillng on a small piston blind hole first till the following formula is completed, and the formula can be found in the specification; and then conducting semifinishing on the big piston blind hole till the following formula is completed, and the formula can be found in the specification; (3) conducting semifinishing on the big piston blind hole first till the following formula is completed, and the formula can be found in the specification, wherein the depth of the hole is 320mm, cylindricity is smaller than or equal to 0.05mm, and the surface roughness Ra is 3.2 Mu m; conducting machining on the orifice of a counter bore and the big piston blind hole Phi 71 till the runout is smaller than or equal to 0.04mm, and the surface roughness Ra is 3.2 Mu m; and then conducting semifinishing on the small piston blind hole till the following formula is completed, and the formula can be found in the specification, wherein the depth of the hole is 359mm, and concentricity with the big piston blind hole Phi 71 is smaller than orequal to 0.05mm; (4) conducting finish machining on the big piston blind hole first till the following formula is completed, and the formula can be found in the specification, wherein the depth of the hole is 320mm, the requirement of cylindricity is smaller than or equal to 0.03mm; conducting finish machining on the orifice of a counter bore Phi 235 and the big piston blind hole Phi 71 till therunout is smaller than or equal to 0.04mm, and the surface roughness Ra is 3.2 Mu m; and conducting finish machining on the small piston blind hole till the following formula is completed, and the formula can be found in the specification, wherein the depth of the hole is 359mm, concentricity of the small piston blind hole Phi 25 and the big piston blind hole Phi 71 is smaller than or equal to 0.02mm, and the surface roughness Ra is 1.6 Mu m; and (5) conducting honing on the big piston blind hole till the requirement of design size of the big piston blind hole of the oil cylinder is satisfied.

The invention relates to a gear carburization thermal treatment tool which comprises gear support brackets, wherein support bracket installation holes are formed around the gear support brackets; a plurality of support columns are uniformly arranged at the middles of the gear support brackets; the support columns are connected together through support rib plates; the parts (of the support columns) close to the boundaries of the gear support bracket are connected with a bracket body frame through support rib plates; stair surfaces are formed on the support columns and chamfers are arranged at the upper ends of the support columns; a bottom disc takes the shape of a rectangle; cylindrical tool angle installation holes corresponding to the support bracket installation holes are formed at edges of the bottom disc; a plurality of rectangular holes are uniformly formed in the bottom disc; circular bosses are arranged at the lower end (close to the end surface) of the cylindrical tool angle; the parts (of cylindrical tool angles) below the bosses are inserted into the cylindrical tool angle installation holes; the parts (of the cylindrical tool angles) above the bosses are sequentially and serially connected with 1-7 layers of gear support brackets through the support bracket installation holes. The gear carburization thermal treatment tool is simple in structure, reasonable in design and low in manufacturing difficulty; the layers of the gear support brackets can be adjusted according to the number of gears to be treated, and the installation is simple and quick.

The invention discloses a method for mainly machining a large-diameter super-thin-walled high-precision tubular product with the diameter-thickness ratio larger than 1000, and belongs to the technical field of metal machining and forming. The method particularly comprises the steps that 1, surface defects of the tubular product are eliminated; 2, one end of the tubular product is expanded; 3, the non-expanded end of the tubular product is inserted into the die hole of a plug die, and an expanding core head is fixed to a core rod connected with a floating structure; 4, the expanding core head is moved downwards, a calibration bench of the expanding core head and a calibration bench of the plug die are kept on the same height, and the expanding core head is fixed; and 5, a chuck is adopted to clamp the expanded end of the tubular product, the chuck is moved upwards to draw the tubular product, and the large-diameter super-thin-walled seamless tubular product with the diameter-thickness ratio larger than 1000 is obtained. The large-diameter super-thin-walled high-precision tubular product machined through the method has the advantages of being light, high in strength and modulus, good in fatigue-resisting performance and the like, and has the wide application prospect in fields of aerospace, ships, nuclear power, automobiles and the like.

The invention relates to a turn-milling machining process method for a gyroscope wire protecting plate. The method comprises the step (1) of clamping a workpiece on a lathe for the first time; the step (2) of drilling concentric inner hoes on the lathe; the step (3) of milling an arc groove on the lathe; the step (4) of performing drilling and counter boring on the lathe; the step (5) of fine boring the inner holes on the lathe; the step (6) of finish-turning an outer circle on the lathe; the step (7) of cutting off the workpiece on the lathe; the step (8) of turning over and clamping the workpiece on the lathe for the second time; the step (9) of turning a back side groove and finish-turning the end face on the lathe; and the step (10) performing metering, detection, cleaning, packaging and warehousing. According to the method, a turn-milling machining process is adopted in the machining process of the gyroscope wire protecting plate creatively, and the machining of the workpiece canbe finished on the lathe only; the clamping number of the process is decreased to 2 from 5, and the clamping number of the workpiece is decreased effectively; the auxiliary machining time is shortenedgreatly, and the part machining cost is reduced; the machining efficiency is improved; the method can meet the requirements of small-batch production and large-batch production of the gyroscope wireprotecting plate, and can be popularized in the production and machining of related sheet parts.

The invention provides an electro-hydraulic forming device for a thermal-plastic glass fiber enhanced aluminum alloy laminated plate. The device comprises a power supply device, a mold and a fixed heating device, and is characterized in that the mold is a graphite female mold (2); an exhaust hole (15) is formed in the bottom of the graphite female mold (2), and a vacuum pump can be used for emptying gas in the graphite female mold (2); during forming, the graphite female mold (2) is positioned through a circular groove in a graphite base (4), and a hydraulic cylinder (14) applies pressure to the graphite female mold (2) so as to fix the graphite female mold (2). According to the forming device, by the full use of a high-rate forming characteristic of electro-hydraulic forming, interlamination shearing force in the forming process can be reduced, so that the interlamination cracking is reduced, and the transverse rigidity of a laminated plate can be improved; furthermore, due to the high-rate forming characteristic of the electro-hydraulic forming, the problem of large recurrent magnitude caused by preheating punching can be solved, and the shape and orientation precision higher than that by adopting punching forming is achieved.

The invention relates to a forming machining method for a blind hole hollow motor shaft, and belongs to the technical field of precision transmission part machining. The forming machining method comprises the following steps that S100, a sub-part A is machined; S200, a sub-part B is machined; and S300, the sub-part A and the sub-part B are machined to form the blind hole hollow motor shaft, wherein the step (S200) of machining the sub-part B comprises the following substeps of (S210) obtaining a bar material which meets the requirements of the part; S220, the bar is made into a pipe blank; S230, the pipe blank is subjected to heat treatment, and a pipe material with the length needed by the manufactured sub-part B is obtained; S240, the outer circle of the pipe material is subjected to preprocessing treatment; S250, the pipe material is subjected to rotary swaging, and a variable-diameter multi-step sub-part B is obtained; and S260, the sub-part B is machined. By the adoption of the process method, the blind hole hollow motor shaft meeting the requirement can be machined and manufactured, the machining procedure of parts is shortened, the machining efficiency is improved, and the utilization rate of related materials and the product competitiveness are improved.

The invention discloses a method for processing a Sendzimir roll wobbler slot. A grinding device is used in the method. The grinding device comprises a grinding head linkage component, a measuring plate, a centre frame, a V-shaped bracket, a trisection correcting plate, an indexing component and a fixing component which are arranged on a lathe in turn. Under the condition of using the grinding device, the method provided by the invention comprises the following steps: positioning a workpiece; horizontally moving a lathe saddle; driving the grinding head linkage component to move; starting a motor and dry grinding; grinding a first wobbler slot working surface at first; releasing the centre frame; pulling out a bolt and rotating the indexing component so as to index; verifying precision bythe trisection correcting plate; plugging the bolt again and tightly blocking the workpiece, thereby grinding a second wobbler slot working surface at the same side; and similarly, grinding the otherwobbler slot working surfaces at the same side. The wobbler slot working surfaces ground by using the device and the method provided by the invention are low in roughness degree and high in accuracy of form and position.

The invention relates to an indexing device for a pipe joint. The indexing device mainly comprises an upper cover plate, a left locating nut, a right locating nut, a left threaded pin, a right threaded pin, a left locating and pressing assembly, a right locating and pressing assembly, a rotary indexing head assembly, a compression block assembly, a locking screw, a flange plate, a connecting assembly, a lower cover plate and a base; the upper cover plate is located at the upper part of the base and corresponds to the lower cover plate, and both the upper cover plate and the lower cover plate are fixedly arranged on the base through screws; the left locating nut and the right locating nut are fixedly arranged between the left locating and pressing assembly and the lower cover plate and between the right locating and pressing assembly and the lower cover plate through the left threaded pin and the right threaded pin; the rotary indexing head assembly and the compression block assembly are respectively correspondingly arranged at the upper and lower ends of the base; and the locking screw and the compression block assembly are arranged side by side, and the locking screw is used for radially locking the compression block assembly. By using the indexing device disclosed by the invention, not only is the production efficiency of the pipe joint increased, but also the production cost is greatly reduced, and the geometrical precision of a product is improved.

The invention discloses a preparation method for motor shell aluminum profile. The preparation method comprises the following steps that raw materials are prepared in proportion, an aluminum ingot isobtained after smelting and casting, homogenizing and extruding are conducted on the aluminum ingot to obtain a semi-finished motor shell, and cooling, straightening and aging are conducted on the semi-finished motor shell to obtain the finished motor shell aluminum profile. Correspondingly, the invention further discloses a motor shell which is prepared by adopting the above preparation method. The invention further discloses a motor which comprises the motor shell. By means of the method, the aluminum profile which is low in cost and good in mechanical property and extrusion property can beobtained, and the method can be suitable for production of motor shells in complex shapes; Meanwhile, the extrusion speed can be increased, and the production efficiency is improved.

The invention discloses a method for machining a large-radius arc-section spiral groove. The method combines enveloping machining with forming machining, the large-arc-radius spiral groove is machined in the mode that multiple small-arc-radius spiral lines are machined so that selection of cutter nose radiuses is not limited by the radius of a section needing to be machined, the cutting state is improved, cutting resistance and cutter breaking phenomena are reduced, and precise machining of the large-radius arc-section spiral groove is achieved. A small-diameter forming cutter is used, on one hand, a high linear cutting speed is achieved, a machined surface is strengthened, and surface quality is improved, and on the other hand, a curved surface enveloped by the small-diameter forming cutter has higher surface roughness. By means of numerical control programs, spatial arrangement precision of tiny-section spiral lines is controlled so that shape precision of a section arc of the spiral groove can be below 0.04 mm, and the size and position precision can be below 0.03 mm / 1000 mm. According to the method, the surface roughness of the machined spiral groove can be improved by increasing the number of the spiral lines enveloping the section arc of the spiral groove, and the highest surface roughness can be below Ra 0.8.

A technology for finishing and reinforcing part includes designing and making a set of finishing mould composed of sizing die, finishing pin and finishing sleeve, loading the geometric body to be squeezed in the part into sizing die, squeezing it to pass it through the die, and squeezing again with another mould having different size. Its advantages are high effect on increasing size precision and reinforcing surface, and high productivity.

The invention discloses a method for processing a large-diameter figure-eight-shaped hole series. The hole series comprises a first hole and a second hole which are crossed in parallel to form a figure-eight shape and are cut by a boring tool in a vertical boring way, and the range of a cutting edge angle Alpha of the boring tool is not less than 72 DEG and not more than 90 DEG; and the method comprises the steps as follows: 1), placing workpieces onto a vertical boring worktable and enabling the front end surfaces of the workpieces to face up, and enabling the shaft lines of the first hole and the second hole to be in the perpendicular direction and parallel to a vertical boring spindle; 2), aligning the shaft center of the first hole by a dial indicator and enabling the front end surfaces of the workpieces to be perpendicular to the vertical boring spindle, clamping and fixing the workpieces; 3), carrying out pre-boring, semi-fine boring and fine boring on the first hole in sequence, and blowing away cuttings by compressed air; 4), aligning the shaft center of the second hole on the basis of the shaft center of the first hole; 5), carrying out pre-boring, semi-fine boring and fine boring on the second hole in sequence, and blowing away the cuttings by the compressed air; and 6), deburring, chamfering, and finishing the workpieces. According to the method, the processing precision and the working efficiency are improved; and the method is suitable for cutting the large-diameter figure-eight-shaped hole series in large rotary screw rods or other large workpieces.

The invention relates to a manufacturing method for a hot stamping die cooling pipeline, which is used for forming an integrated cooling pipeline in the process of casting the hot stamping die. The core of the method is that the hot stamping die cooling pipeline is manufactured by embedding a ceramic core, casting to form an integrated hot stamping die and cleaning the ceramic core by an alkali detonation process to form the die cooling pipeline, wherein design of the ceramic core and cleaning of the ceramic core are related. The cooling pipeline can be accurately positioned in the hot stamping die by the method provided by the invention and the internal quality of the cooling pipeline is improved, so that the cooling effect of the cooling pipeline is improved, the defects that a drilling type cooling pipeline cannot be random, is cooled non-uniformly and is leaked, and the pipeline is melted through and collapsed when the embedded metal cooling pipeline is cast are overcome, and the hot pressing die with high quality and the complex pipeline can be produced.

The invention provides a small ultrasonic high-speed drilling numerical control machine tool, and belongs to the technical field of mechanical manufacturing. The small ultrasonic high-speed drilling numerical control machine tool solves the problem that in the prior art, high-precision fine hole parts are difficult to machine. The small ultrasonic high-speed drilling numerical control machine tool comprises a vibration installing and clamping system, a drilling system, a cooling system, a protection cover, a marble platform, adjustment legs and triangular aluminum. The four pieces of triangular aluminum are connected to the four edges of the marble platform through glue respectively. The edges of the triangular aluminum are flushed to the edges of the marble platform. Every two pieces of adjacent triangular aluminum are connected through glue at the joint. The four adjustment legs are symmetrically and fixedly connected to the four corners at the bottom of the marble platform respectively. The vibration installing and clamping system is fixedly connected to one end of the marble platform. The drilling system is fixedly connected to the other end of the marble platform. The vibration installing and clamping system is used in cooperation with the drilling system for completing the drilling of workpieces. The cooling system is sued for cooling the workpieces. The protection cover covers the marble platform. The problem that high-precision fine holes are difficult to machine is effectively solved.

The invention relates to an integrated DC brushless limited angle torque motor rotor magnetic steel enclosing structure and method. The structure includes rotor magnetic steel, a protective cover, andan end face gland. The protective cover is made of a light non-magnetic material and is solid of revolution structure having an L-shaped bus shape. The end face gland is made of the light non-magnetic material and is a ring-shaped structure with a rectangular cross section. The inner circumferential surface of the rotor magnetic steel is bonded to the outer circumferential surface of a rotor core. The rotor magnetic steel and the rotor core are press-fitted in the protective cover. The outer circumferential surface and one end face of the rotor magnetic steel are bonded to the inner wall surface of the protective cover. The end face gland is press-fitted into the protective cover from the open end of the protective cover. The inner end of the end face gland is bonded to the other end faceof the rotor magnetic steel, so that the rotor magnetic steel is enclosed in an enclosed annular space delimited by the inner wall surface of the protective cover, the outer circumferential surface of the rotor core, and the inner end surface of the end face gland. The enclosing structure and method completely wrap and enclose the magnetic steel so as to isolate the magnetic steel from the external environment and slow down the corrosion of the magnetic steel.