79results about How to "Improve the level of manufacturing technology" patented technology

A method for processing split thin-walled parts belongs to the technical field of aero-engines. The method can be used for processing not only components of an aero-engine but also mechanical parts, and enables a processing stress and a residual stress, which are formed in the part processing process, to interact and cancel, so that the problem that the split thin-walled parts are deformed is solved. The method comprises the following steps: selecting a blank which adopts a ring-shaped forged piece for processing two parts; roughing the ring-shaped forged piece before welding; achieving heat treatment to remove the residual stress for roughing; semi-finishing; welding longitudinal mounting edges to enable the longitudinal mounting edges of the two parts to be in crossed distribution; conducting heat treatment to eliminate the welding stress; lathing a datum plane; cutting off to separate the two parts; linearly cutting the longitudinal mounting edges of the two parts; and respectively finishing the two parts.

The invention discloses a method for extracting carrageenan, which comprises the following steps: washing a raw material with water, performing combined alkali treatment on the raw material, wherein the concentration of alkali is decreased gradually, washing the raw material to enable the pH to be 7-8; carrying out composite enzyme treatment, removing heavy metals by using a metal chelating agent, boiling carrageenan, filtering coarsely, filtering finely, reducing temperature, gelling, dewatering, cutting into strips, drying, crushing and screening so as to obtain the carrageenan. According to the invention, a mixed solution of NaOH, KOH and LCI with gradually decreased concentration in three grades is adopted in an alkali treatment process, the loss of carrageenan is reduced effectively while the alkali treatment time is reduced; cellulase and protease combined treatment is adopted, and the yield of the carrageenan is improved while the high gel strength of the carrageenan is ensured; ethylene diamine tetraacetic acid and nopotassium phosphate are adopted for further treatment for the raw material, and the heavy metals in the raw materials are removed effectively. The gel strength of the carrageenan prepared by the method is greater than or equal to 2139.2 g / cm<2>, the extraction rate is greater than or equal to 23.9 percent, Pb is less than or equal to 2.5 mg / kg, As is less than or equal to 1.0 mg / kg, Hg is less than or equal to 0.5 mg / kg, and the Cd is less than or equal to 1.0 mg / kg.

The invention discloses a high-performance water-based paint for medium and small mechanical equipment, which comprises the following components in percentage by weight: 35-45% of water-based resin, 8-15% of full methylated amino resin, 2-8% of dispersant, 1-5% of pigment, 0.5-1% of wetting and leveling agent, 0.5-1% of thixotropic agent, 0.5-1% of defoaming agent, 0.1-0.8% of flash etching inhibitor, 0.1-0.8% of mildew inhibitor, 1-5% of film forming assistant and 30-40% of deionized water. The invention also discloses a preparation method of the high-performance water-based paint. The high-performance water-based paint has the characteristics of water dilution property, energy saving, environmental protection and the like, and is convenient for construction; the coating has the advantages of high aging resistance, solvent resistance, moisture and heat resistance, high gloss, high fullness and favorable mechanical properties; and the properties of the paint film achieve or exceed those of similar type oil-based products.

The invention relates to an improved copper electroplating method of a crystal silicon solar battery. The silicon nitride layer on the surface of the conventional battery has many pin holes, and in the process of preparing copper (Cu) electrodes by an electroplating process, the Cu electrodes are easy to be adsorbed to the pin holes of the silicon nitride layer to lead to blur in appearance of the solar battery. Meanwhile, the copper electrodes are easy to seep into the silicon nitride layer and a silicon-based interface through the pin holes, and Cu as a deep energy level impurity with very fast diffusion rate entering into a pn junction affects the service life and generating efficiency of the battery, so that the reliability of the battery is reduced. A protective film covers the surface of the silicon nitride layer before Cu electroplating to prevent Cu from being adsorbed and seeped in the electroplating process, so that the reliability of the battery is guaranteed while the blur in appearance of the solar battery is avoided. The protective film can be removed after Cu electrode electroplating. According to the technological requirements of the crystal silicon batteries, the protective film can be still remained if parameters of the battery such as optical and electrical properties and reliability are not affected.

The invention discloses a gantry type hull sectional drawing machine and belongs to the technical field of shipbuilding and oceanography engineering. The hull sectional drawing machine is composed of a drawing mechanism and a gantry. The drawing machine mounted on the gantry comprises a trolley and a multi-freedom-degree drawing arm; and the gantry is provided with a travelling mechanism on rails. The gantry supports the trolley and the drawing arm; the drawing mechanism which provides high-accuracy multi-freedom-degree movement and locating is a fundamental structure of the drawing machine and is composed of a plumbing arm, swing arms, omni-directional mechanisms, Z-shaped knuckle, a telescopic arm, a pen clamping frame and the like. The whole machine design is ingenious, the structure is concise, the mounting and dismounting is convenient, the hardness and the stiffness are high, the maintenance is simple, and the reliability is high. Automatic, efficient and high-accuracy sectional line drawing can be performed on steel structures, and the drawing machine is an essential manufacture device in modern shipbuilding enterprises and has great significance for improvement of manufacturing technology levels, product quality and economic benefits of shipbuilding and oceanography engineering equipment.

The invention provides a holographic grating exposure method adopting heterodyne interference fringe locking control, belonging to the field of spectrum techniques. The existing holographic grating exposure method realized by adopting a linear array CCD (Charge Coupled Device) in the prior art has the problem that high-frequency fringe jitter inhibition effect is poor due to a reason that the response speed of the linear array CCD is slow. A set of holographic grating exposure device and a set of heterodyne interference fringe locking control device are equipped. Interference fringes are locked in real time and are placed on a grating substrate for exposure. The method provided by the invention has the advantages that the interference fringes can be locked at a certain fixed value relative to the phase of the grating substrate during exposure of a holographic grating; since the control bandwidth is larger, the high-frequency fringe jitter can be better inhibited, the contrast of the groove profile of the holographic grating is guaranteed and the manufacturing process level of the holographic grating is improved.

The invention relates to the field of deep chemical milling of titanium-alloy large-scale cylindrical parts, in particular to a deep chemical milling method of TA12 and TA15 titanium-alloy large-scale structural components. The deep chemical milling method comprises the following technological lines: degreasing, washing, pickling, washing, coating with a protecting adhesive, marking, removing a protecting adhesive film on a to-be-milled surface, chemically milling and conducting vibrating finishing. The method comprises the following steps: a titanium-alloy cylindrical part is processed into a thin-walled grid rib by adopting a deep chemical milling technology, and the thin-walled grid rib is primarily marked and chemically milled to obtain a chemical milling machine case shell with all mounting bases. The manufacturing of integral, thin-walled and grid-shaped titanium-alloy large-scale cylindrical structural components is completed by adopting the titanium-alloy deep chemical milling technology, and the requirement that the large-scale cylindrical parts are chemically milled to form the grid-shaped structure is met; and deformation, caused by machining, is avoided fundamentally, the problem of low strength caused by welding is solved, the overall rigidity of the component is improved, and besides, the production cycle is shortened, and the structural weight is reduced.

The invention relates to a variable-section aeronautical long beam structural member flexural rigidity calculating method, is based on a three-point press-bending mechanics model and belongs to the aeronautical structural mechanics field. The method comprises steps that 1), equal-section and variable-section long beam members are constructed for comparison; 2), bending deformation curves of the equal-section long beam member and the variable-section long beam member subjected to external loads are calculated through a three-point press-bending finite element model; 3), the total bending strainenergy of the two long beams is calculated through the finite element bending deformation curves; 4), a bending deformation curve and the bending strain energy of the equal-section beam are calculated through utilizing an equal-section beam three-point press-bending analysis model; and 5), the results of 2), 3) and 4) are compared, and the backstepping method is utilized to find equivalent section inertia moment and equivalent stiffness of the variable-section beam. The method is advantaged in that variable-section beam flexural rigidity is given, estimating rigidity based on experience is avoided, data precision is improved, the theoretical basis is provided for beam part clamping schemes and processing deformation control in the processing process, the tool manufacturing period is shortened, and efficiency is improved.

The invention discloses an alcohol-dissoluble polyurethane resin compound printing ink and a preparation method thereof. The printing ink is prepared by processing the following components by weight percent: 25-35% of alcohol-dissoluble polyurethane resin liquor, 1-3% of polyvinyl butyral resin, 1% of extinction powder, 8-33% of pigment, 0-0.5% of an adhesion reinforcing agent, 15-40% of ethanol and 15-25% of ethyl acetate; and polyurethane resin in the alcohol-dissoluble polyurethane resin liquor accounts for 30-35% by weight percent. The printing ink has the advantages of environmental friendliness, safety, wide application scope, good thermal stability and the like.

The invention provides a machining method for controlling deformation of a high-precision and high-temperature alloy thin-walled dual-wing mounting edge disk part. The machining method comprises the process route of rough turning, fine turning, finish turning, marking, washing, intermediate inspection, stress relief heat treatment, fluorescent inspection, grinding, rim end face turning, shot blasting, and grinding and end face repairing after shot blasting. A special clamp for enhancing rigidity and preventing deformation is adopted for broaching a mortise, and the deformation problem caused during workpiece machining is solved. The mortise broaching of the disk part adopts the mode of supporting on the face of broaching the mortise and compressing on the upper portion. The main machiningsteps of specific test workpieces comprise semi-finish turning adopting the axial positioning and compressing mode, machining through a special tool to reduce the clamping deformation, and optimizingmachining through a lace numerical control program. The machining method has the advantages that the yield is improved to 80% or above from 40%, the deformation of the disk part is controlled to a certain degree, the technical bottleneck of deformation of the high-temperature alloy dual-wing mounting edge disk part is broken through, the manufacturing technical level is improved, and profound significance is achieved.

The invention discloses an organic light-emitting diode display panel. The organic light-emitting diode display panel comprises a plurality of pixel units, a plurality of temperature sensing units and a control unit; the multiple pixel units are arranged in a matrix manner; the multiple temperature sensing units are arranged corresponding to the multiple pixel units; the control unit is electrically connected with the multiple temperature sensing units; the organic light-emitting diode display panel receives input; the control unit receives at least one temperature signal transmitted by the multiple temperature sensing units, and a control position or instruction corresponding to the input is calculated based on multiple temperature signals.

The invention discloses a method for forming a multi-focus bionic compound eye structure, and relates to the field of micro machining, bionic compound eyes and the like. The method comprises the following main steps: (1) selecting a base material and spinning photoresist; (2) moving a mask for exposing to realize photoresist formation of a planar continuous surface profile multi-focus compound eye structure; (3) etching the planar multi-focus compound eye photoresist structure, and transferring to the base material; (4) preparing a flexible multi-focus compound eye structure template complementary to the multi-focus compound eye structure based on the multi-focus compound eye structure on the base material; and (5) introducing a photocuring material, and transforming the planar multi-focus bionic compound eye structure information into a curve structure by utilizing a structural device with mutually matched curvature to form an integrated multi-focus bionic compound eye structure.

The invention provides a numerical control finish turning processing method of an annular Omega-shaped groove of a titanium alloy thin wall disc ring piece. The numerical control finish turning processing method of the annular Omega-shaped groove of the titanium alloy thin wall disc ring piece includes: confirming an allowance in each finish turning processing stage of the annular Omega-shaped groove of the titanium alloy thin wall disc ring piece; confirming a processing scheme of the finish turning stages of the annular Omega-shaped groove of the titanium alloy large diameter thin wall disc ring piece; compiling a numerical control turning program of the finish turning stages of the annular Omega-shaped groove of the titanium alloy large diameter thin wall disc ring piece; controlling a processing route of each numerical control finish turning processing stage of the annular Omega-shaped groove of the titanium alloy thin wall disc ring piece. The numerical control finish turning processing method of the annular Omega-shaped groove of the titanium alloy thin wall disc ring piece breaks a technical bottleneck in processing of a titanium alloy piece of special structure, improves processing efficiency on the premise of meeting processing technology requirements of the annular Omega-shaped groove of the titanium alloy large diameter thin wall disc ring piece in numerical control turning of a titanium alloy material supercharging first stage disc, achieves high efficiency processing of the annular Omega-shaped groove of the titanium alloy large diameter thin wall disc ring piece, solves the problems that the annular Omega-shaped groove of the titanium alloy large diameter thin wall disc ring piece is low in processing efficiency and long in machine occupying time, and alleviates production bottlenecks in machining of a vertical lathe.

The invention discloses a method for processing titanium alloy sealing deep cavity threads. The specific processing content is the sealing deep cavity threads of a titanium alloy fan shaft; a special lathing tool is used to process the titanium alloy sealing deep cavity threads and is formed by a toolbar and a blade (4), wherein the toolbar is specifically formed by a toolbar body (1), a processing cutting board (2) and a processing cutting board slideway (3); the specific requirements of the method for processing titanium alloy sealing deep cavity threads are that the tool only enters from a large end to process, a small diameter is firstly lathed, a hollow knife slot is then lathed, and the threads are lathed; and the processing parameter requirements are that the feed rate f is equal to 1.5mm / r, the rotating speed s is equal to 150-200 r, and the lathing depth ap is equal to 0.1-0.2mm. By the method, the cutting vibration can be effectively controlled, so that the technical bottleneck that a titanium alloy sealing deep cavity threaded cutter vibrates, cannot be observed and thus is difficult to process are broken through. The method has profound significance and inestimable economic benefit.

The invention belongs to the technical field of machining, particularly relates to a combined machining tool for molded surfaces of deep cavities among drum webs and a machining method of the combined machining tool. By the combined machining tool, the technical problems of vibration, tool collision and poor surface quality during machining of the molded surfaces of the deep cavities among the drum webs of aero-engines are solved. The combined machining tool comprises a middle plate-shaped tool, an upper plate-shaped tool and a lower plate-shaped tool. The machining method includes the following steps: step 1, fixedly connecting a transfer tool with a numerically-controlled vertical turning tool clamp; step 2, machining middle molded surfaces of the deep cavities among the drum webs; step 3, machining upper molded surfaces and upper arc-shaped molded surfaces of the deep cavities among the drum webs; step 4, machining lower molded surfaces and lower arc-shaped molded surfaces of the deep cavities among the drum webs to complete machining of primary inner cavities; step 5, circularly performing the step 2 to the step 4 to sequentially complete machining of each-level inner cavities.

The invention discloses a local annealing method and an annealing device for a rivet cover of a high-temperature alloy self-plugging rivet. The method comprises the step of annealing the rivet cover locally by forming a temperature field with a temperature gradient in a heating process of the rivet. The annealing device employed by the annealing device for the rivet cover of the high-temperature alloy self-plugging rivet comprises a heating system and an auxiliary heating cover externally sleeving the rivet cover. According to the method and device disclosed by the invention, the temperature of the local heating region of the rivet cover can be precisely controlled in a production process of the self-plugging rivet, and the local heat treatment effect is relatively good, so that the hardness of the rivet cover changes in gradient, the production quality of the rivet cover is stable, the quality of the rivet cover is improved, the rate of finished products is improved, the operation is simple, batch production is facilitated, and the heat treatment process is precisely controlled.

The invention provides a composite fixture which comprises a vertical plate-shaped fixture body and at least one clamping device assembly. The clamping device assembly comprises two gripper jaws and cylinder driving systems arranged at the tail ends of the two gripper jaws; each cylinder driving system comprises a housing and a cylinder arranged in the housing, and a piston rod of the cylinder is connected with one gripper jaw so as to drive the gripper jaw to carry out relative movement; and the clamping device assembly is fixedly arranged on the fixture body and allows the two gripper jaws to extend out of the edge of the fixture body so as to clamp an object. When the composite fixture is used for setting a sand core, the sand core can be smoothly placed into a sand mold cavity, so tilting of the sand core and colliding between the sand core and a sand mold in the process of placing are avoided, integrality of the sand core and the sand mold cavity is maintained, and the quality of a casting is improved; furthermore, automatic core setting by using the composite fixture enables production efficiency to be enhanced and the level of manufacture technology for railway vehicles to be comprehensively elevated.

The invention provides a shadowless illumination lamp. The lamp comprises a shell, a lamp panel, a condenser lens module, a euphotic plate, a transparent plate and a focusing mechanism. A parallel offset is formed between the optical axis of each Fresnel lens on the condenser lens module and the optical axis of a corresponding high-power light emitting diode (LED) on the lamp panel, and the focusing mechanism can drive the condenser lens module to move up and down to adjust the size of light spots. Because the Fresnel lens is adopted, more rays emitted by the high-power LED can be converged, and the illumination of the light spots can be improved; because a method for performing parallel trace offset on the optical axis of the high-power LED and the optical axis of the lens to converge the light spots is adopted, the manufacturing cost of the traditional condenser system is greatly reduced; and because a lens module moving mode is adopted for focusing, the size of the light spots can be adjusted under the shadowless condition of projection light.

The invention relates to an LED illumination lamp combined by using strip radiator assemblies and using LEDs as luminous sources. In the prior art, a lamp holder of an LED and a radiator serve as separate pieces and are assembled together, the heat dissipation effect is good, but the productivity is low and the production cost is high. The invention aims to develop the LED illumination lamp combined by using the strip radiator assemblies. The LED illumination lamp is formed by fixedly connecting parallel strip radiator assemblies with LEDs into a whole through mounting assemblies, a profile strip radiator is provided with radiating teeth, the section of the profile strip radiator has a bilateral symmetry structure, and a strip LED aluminum substrate and a corresponding lens are adhered and fixed in a long groove below the strip radiator. The LED illumination lamp better solves the technical problems of complex radiating structure, complex production process and high cost, and is widely applied to illumination of various indoor places, roads, tunnels, bridges and the like, particularly illumination under a high-temperature environment.

The invention relates to a radiator component using an LED as a luminous source lamp, namely a combined LED strip-type radiator component. In the background art, a plurality of LED lamp holders and radiators as separation pieces are assembled together, thus having better radiating effect as well as high material cost, complex process and low production efficiency, thereby causing higher production cost when an LED is utilized as a luminous source lamp. The invention aims to develop the combined LED strip-type radiator component used for a high temperature resistant high-power LED lamp. The radiator component comprises strip-type radiators (1) as sectional materials which can be assembled in parallel and the radiating teeth of the radiators are in a bilateral symmetry structure. After the LED strip-type radiating component is assembled into a lamp, the lamp can be widely used for lighting in occasions such as various rooms, roads, tunnels and the like, especially lighting in high temperature environments.

The invention discloses a method for evaluating the uncertainty of measurement results of a battery combustion testing machine. The method comprises the following steps of: firstly putting a to-be-tested battery into the battery combustion testing machine to carry out flame resistance analysis; counting the following various uncertainty components influencing the measurement results: the combineduncertainty u1 caused by the inner diameter measurement of a combustor, the combined uncertainty u2 caused by the calibration of the flame application time, the combined uncertainty u3 caused by the measurement of the after flame time and the combined uncertainty u4 caused by the measurement of the flame height; and calculating the combined standard uncertainty uc shown in the specification and the expanded uncertainty U=k.uc (k=2). The method disclosed by the invention has the advantages that various uncertainty components of the battery combustion testing machine are comprehensively quantified and analyzed; a scientific, complete and accurate evaluation method is provided for evaluating the reliability of the measurement results of the battery combustion testing machine; and the blank ofhow to evaluate the uncertainty of the measurement results of the battery combustion testing machine is filled.

The invention discloses a barrel mounting type large-caliber thick-wall connecting pipe of a boiler and a pressure vessel and a connecting method. For a long time, welding grooves of barrel mounting type or seat type large-caliber thick-wall connecting pipes (called large connecting pipes for short) of boilers, pressure vessels, nuclear power and other pressure-bearing equipment are most in a saddle-shaped curved face form, and along with constant changing of shapes of surfaces around barrel holes, the structural forms of the grooves are single. The problems that the flame gas cutting qualityis poor, hardening layers on the surfaces of the grooves are not ground and removed thoroughly, the numerical control machining period is long, and the manufacturing cost is high exist. The barrel mounting type large-caliber thick-wall connecting pipe comprises a connecting pipe body. The shape of a welding groove on the bottom face of the connecting pipe is formed by multiple planar welding grooves, a welding groove of the type D is formed by the welding groove and the outer surface of a barrel, and the tilt angle of each planar welding groove ranges from -35 degree to 40 degrees. The barrelmounting type large-caliber thick-wall connecting pipe is applied to design and manufacturing of the manual welding rod arc welding groove structure of the barrel mounting type large-caliber thick-wall connecting pipe of the boiler and the pressure vessel.

The invention discloses a rapid stripping device of an insulating layer of a cable head. The device comprises a rack, a first support, a second support, a third support, a fourth support, a fifth support, a spool rotationally mounted on the first support, a tensioning wheel rotationally mounted on the second support, a stripping assembly fixedly mounted on the third support, a cutter assembly fixedly mounted on the fourth support and a cable reel rotationally mounted on the fifth support, wherein the first support, the second support, the third support, the fourth support and the fifth supportare fixedly arranged on the rack sequentially. The device has the characteristics of being simple in structure and convenient and reliable to operate; flexible movement can be facilitated by means ofuniversal wheels, labor is saved, the insulating layer and a cable core are automatically collected after being separated, and the device is fully automatic in the whole process and high in strippingefficiency.

The invention belongs to the technical field of aviation composite material manufacturing, and discloses a honeycomb stabilization method for forming a large-thickness and large-size honeycomb sandwich structure, for a large-thickness honeycomb, when a local stabilization process is adopted, the lateral pressure resistance of the large-thickness honeycomb is enhanced, the overall rigidity is reduced, the stabilized honeycomb keeps certain deformation capacity, and the stability of the large-thickness honeycomb is improved. When a large-thickness honeycomb sandwich structure is formed, the deviation between a honeycomb and a theoretical molded surface of the honeycomb is reduced through honeycomb deformation, so that enough forming pressure is applied to a mold surface skin of the honeycomb sandwich structure. The method solves the problems that the rigidity of a large-thickness and large-size honeycomb is increased after the side pressure resistance of the large-thickness and large-size honeycomb is increased, the edge of the formed honeycomb sandwich structure is whitened due to edge upwarp, namely the porosity is increased due to insufficient pressurization of the film pasting surface of the area, the preparation process level of the large-thickness and large-size honeycomb sandwich structure is improved, and a large practical application value is achieved.

Disclosed are a brush bristle planting machine capable of realizing co-hole multi-color bristle planting, and a bristle planting method. A large bristle-taking notch is formed in the outer edge of a bristle taker, and the inner side of the large bristle-taking notch is provided with a small bristle-taking notch communicated with the large bristle-taking notch, wherein the small bristle-taking notch and the large bristle-taking notch obtain bristles from different bristle boxes in sequence; a sliding groove is formed in the bristle taker; the sliding groove is internally provided with a bristle-taking sliding block capable of sliding back and forth; the outer side of the bristle-taking sliding block is provided with a bristle-taking sliding block notch corresponding to the small bristle-taking notch; meanwhile, a sliding block shifting mechanism is adopted; a swinging cam can swing back and forth around a cam swing shaft, so that the complicated intermittent sliding action of the bristle-taking sliding block is ingeniously solved; and the machine is reasonable in process, simple in mechanical structure, convenient for improvement and upgrading on the basis of an existing bristle planting machine, different types of bristles can be planted in the same brush hole, the production efficiency is high, and the manufacturing process level of the existing bristles is improved.

The invention provides a cladding welding method applied to an upright post of a hydraulic support. The method comprises the following steps that manufacturing is carried out, and particularly, a workpiece is sleeved with an alloy pipe to be completely covered; inlaying and fusing are carried out, particularly, the alloy pipe is squeezed to be attached to the workpiece, reducing and fusing are carried out till a fusion junction boundary is generated between the alloy pipe and the workpiece, and inlaying and fusing are completed; cutting is carried out, and particularly redundant parts at the two ends of the alloy pipe are removed; and sealing and welding are carried out, and particularly the two ends of the alloy pipe are sealed and welded. According to the cladding welding method, the alloy pipe replaces electroplating solution and alloy powder to serve as a wear-resistant and corrosion-resistant material on the surface of the upright post, and the alloy pipe and base layer carbon steel are organically fused into a whole through plastic deformation generated by cold extrusion. Due to the fact that no chemical product is used in the whole production process, no pollutant is generated, and the method is completely harmless to the human body, environmentally friendly, extremely low in energy consumption, short in production process and high in efficiency and is in line with the social development theme of green production.

The invention discloses a novel electromagnetic centrifugal casting process and equipment for a furnace tube. The furnace tube of the conventional industrial furnace is mainly prepared by adopting a centrifugal casting process, so a serious macrosegregation phenomenon occurs in the production process. At the same time, the crystallization mode of metal liquid and the varieties of crystals cannot reach the optimum state, so the properties of the furnace tube are influenced. The invention aims to provide the electromagnetic centrifugal casting process and equipment, which can overcome the defects, eliminate the segregation phenomenon of alloy elements and improve the properties of the furnace tube. The process is mainly implemented by a magnetic field generator and centrifugal casting equipment. Metal elements of the metal liquid are subjected to a Lorentz force in an electromagnetic field to perform fracturing movement, locomotory movement and the like so as to contribute to the reasonable and uniform tendency of the crystallization mode, the varieties of the crystals and alloy distribution of the metal liquid in the furnace tube, so that the using property of the furnace tube is improved, the service life of the furnace tube is prolonged, the technological level of manufacturing the furnace tube is improved, blanks and labor are saved and the like.

The invention discloses a method for turning a large-diameter precision complex molded surface thin sheet part and belongs to the technical field of machining. The method comprises the following steps that (1), it is ensured that the part leakage length is greater than or equal to a half of the width of the whole part, and the molded surface of the outer side of the first surface of the part is turned, namely a half of the molded surface of the outer side of the first surface of the part; (2), the molded surface of the inner side of the first surface of the part is turned, and smooth adaptation connection between a connection knife and the molded surface is noticed; (3), the molded surface of the outer side of the second surface of the part is turned, namely one third of the molded surface of the outer side of the first face of the part; (4), turning of part of the molded surface of the middle of the second surface of the part is finished under the state that the inner side and the outer side are compressed at the same time; and (5), machining of the molded surface of the left of the second surface is finished, smooth adaptation connection between the connection knife and the molded surface is noticed, and the whole machining process is finished. The technical bottleneck of turning of thin-walled sealed washers of high-precision, novel-structure and precision complex molded surfaces is effectively solved, and the far-reaching significance is achieved for improvement of the manufacturing technical level of a new generation of engines.

The embodiment of the invention discloses a bionic muscle unit and a device based on electromagnetic mechanics principle. The unit comprises a round tube shell, a sliding rod, a fixed side coil, a sliding side coil and a metal contact, wherein the round tube shell has an electromagnetic shielding function; the sliding rod two sides of which are provided with printing leads is arranged at the center of the round tube shell; the fixed side coil and the sliding side coil are positioned in the round tube shell and take the sliding rod as the center; the circumambulation directions of the fixed side coil and the sliding side coil are consistent; the printing leads on the sliding rod provide current for the fixed side coil and the sliding side coil; the tail end of the sliding rod is provided with the metal contact for inputting and outputting current and connected with the next stage of muscle unit; and when current in the same direction is connected by the fixed side coil and the sliding side coil, according to Ampere's rule, two adjacent surfaces in the round tube shell are opposite in polarity, attraction is generated, the sliding side coil is pulled to move forward, and the stretching of the bionic muscle unit is finished. The circuits among each unit and each muscle in the embodiment of the invention are simple, great convenience is provided for controlling the stretching of muscle bundles by a computer, and the flexibility and accuracy of a mechanical arm can be improved greatly.

The invention belongs to the technical field of aviation composite material manufacturing, and discloses a large-thickness honeycomb sandwich structure and a forming anti-slip process method. In the manufacturing process of the large-thickness honeycomb sandwich structure, the step of pre-laying and curing is added, an adhesive layer and prepreg are laid in the bevel area of a honeycomb and cured firstly, and then the honeycomb sandwich structure is prepared by taking the partially cured honeycomb of the adhesive layer and the prepreg as a sandwich material. According to the structure and the method, the problems of collapse, deformation and shrinkage of honeycombs in the preparation process of the large-thickness honeycomb sandwich structure are solved, the preparation process level of the large-thickness honeycomb sandwich structure is improved, a large practical application value is achieved, new tools and machined parts are not added, implementation is easy, and the cost is low; The honeycomb structure manufactured by the structure and the method disclosed by the invention has stronger rigidity in an easily-deformed area of the inclined plane.