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

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 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 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 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 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 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 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.

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 discloses a titanium alloy thin-wall structure precision milling surface state robustness process control method. The titanium alloy thin-wall structure precision milling surface state robustness process control method comprises the following steps of carrying out a titanium alloy milling test based on a primary milling process parameter range of a titanium alloy thin-wall structural member; measuring residual stress parameters, obtained by the milling test, of the titanium alloy thin-wall structural member; establishing a first relation model according to milling parameters and the residual stress parameters of the titanium alloy thin-wall structural member; maximizing the residual stress distribution envelope area in the first relation model as a target function and solving to obtain a milling robustness process parameter domain of the titanium alloy thin-wall structural member; and machining the titanium alloy thin-wall structural member based on the milling robustness process parameter domain. According to the method, the sudden change of the surface state of the structural member due to the action of uncontrollable factors in machining is compensated by adjusting the controllable process parameters, it is guaranteed that the fatigue performance of the structural member reaches the expected effect, and the size and form and position precision of the titanium alloy thin-wall structural member is improved.

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.