71results about How to "Easy to realize engineering application" patented technology

The invention belongs to the technical field of welding, and particularly relates to a single-sided welding copper liner device with water cooling and back protection and a corresponding welding method. By circulating cooling water and shielding gas inside a copper liner, the good welding forming effect of workpieces to be welded is ensured, many beneficial effects of reducing welding deformation,prolonging the service life of the liner, preventing oxidation inclusion on the back of a weld seam, refining weld seam grains, improving the tensile strength of the weld seam and the like are realized, and the single-sided welding copper liner device is suitable for various electric-arc welding methods.

The invention relates to a device for performing heat treatment correction on a titanium alloy spoke structure welded case. According to the technical scheme, the device for performing heat treatment correction on the titanium alloy spoke structure welded case comprises a base, a central spindle, an inner cover, a limiting sleeve, a gland and a wedge block. The invention aims to perform heat treatment correction on the titanium alloy spoke structure welded case by utilizing the bulging force and gravity of the device, a supporting plate is limited to shrink to drive an inner case to move up during the heat treatment correction, and the titanium alloy spoke structure welded case is enabled to meet the requirement of design paper through one-step heat treatment correction.

The invention belongs to welding technology and relates to a non-contact arc ignition welding gun capable of realizing stable arc ignition and used for vacuum electric arc welding of a hollow cathode.A hollow cathode of the welding gun is directly inserted into central holes of an outer barrel support and an inner barrel support; an outer barrel component of the welding gun comprises an outer barrel water inlet pipe, an outer barrel water outlet pipe, an outer barrel connecting terminal, a hollow barrel wall and an outer base plate; an inner barrel component of the welding gun comprises an air inlet pipe, an inner barrel connecting terminal, an inner barrel water inlet pipe, an inner barrel water outlet pipe, a barrel wall and an inner base plate; the outer barrel component and the innerbarrel component of the welding gun are separated through an insulating bush; and an arc ignition auxiliary circuit is accessed between the outer barrel connecting terminal and the inner barrel connecting terminal. The hollow cathode is arranged in a closed system between the outer barrel and the inner barrel of the welding gun, thereby preventing the hollow cathode from being polluted by metal vapor due to exposing in electric arc; and the welding gun adopts a bi-channel water cooling system, therefore, the cooling effect is good, the working reliability of the electric arc is high, the service life of the welding gun and the hollow cathode is long, and the stable work of the welding control system is ensured.

The invention relates to a method for preparing a short-chain fatty acid vinyl ester series cement dispersant. Short-chain fatty acid vinyl ester is used as a copolymerization monomer for preparing the cement dispersant material, namely the method comprises the following steps of: performing ternary polymerization by using the short-chain fatty acid vinyl ester, an unsaturated easily-dehydrated compound and an unsaturated sulfonic acid (sulfonate) compound as monomers, performing full alcoholysis and hydrolysis on the polymerization product, performing condensation reaction on the hydrolyzed product and a methoxy polyoxyethylene ether compound under the action of a catalyst, and thus obtaining the cement dispersant. The invention has the advantages of strong process controllability, high structural activity, energy conservation and environment friendliness; the main chain of molecules carries various strong adsorption groups by the polymerization reaction, the water holding property of the alcoholysis product of the short-chain fatty acid vinyl ester is fully exerted, and hydrophilic side chains are grafted to the main chain by the condensation reaction to form the cement dispersant with the novel structure; and the granule dispersibility, the flowability and the age holding capacity of cement slurry are fully improved, the workability of cement is improved, and the cement dispersant shows excellent cement adaptability.

The invention discloses a method and a device for promoting output characteristics of a Nd:YAG laser device and belongs to the field of laser device manufacturing. The device comprises a trapezoid lath laser gain medium, a pumping source, a total reflective mirror, a cylindrical mirror, a diaphragm and an output lens; a Nd:YAG crystal lath bonded with sapphire is arranged as the trapezoid lath laser gain medium; a bonding technique of different materials is utilized to reduce the heat effect of a heat lath laser device and promote the output power and the light beam quality. The excellent heat conduction of the sapphire is utilized to realize the laser output in high output power and high light beam quality in the free oscillation running process of the grazing incidence lath laser device.

The invention relates to an expansion device and a processing method for facing of a large-size medium-thickness cylindrical part. The expansion device adopts the technical scheme that the expansion device comprises a base, a guide plate, an expansion block, a guide seat, an expansion jacking head, a conical head, a support plate, a guide column b, a loosening jacking head, a single-action hydraulic oil cylinder, a manual hydraulic cylinder and a high pressure hydraulic oil pipe, wherein the base is formed by welding an upper support plate, a lower support plate and support columns, the support columns are uniformly distributed along the circumference, the guide seat is fixedly arranged on the upper support plate of the base through a bolt, the guide seat is provided with an inner cavity, the guide column b is fixedly arranged on the lower support plate of the base through a bolt, and the guide seat, the guide column b and the base are coaxially arranged. By adopting the technical scheme, the expansion device has the advantages that the problems of large self weight, higher rigidity, and unreliable manual expansion of traditional thread in the large-size medium-thickness cylindrical part are solved; the manufacturing is simple, the time is shortened, the labor is saved, the fund is reduced, the implementation is easy, and the working efficiency is improved.

The invention belongs to the technical field of composite material mechanical property testing. The invention relates to a method for testing interlayer I-type fracture toughness of a composite material without tracking cracks. According to the test method, based on a correction beam theory of I-type interlayer fracture toughness calculation, a layering length expression and a fracture toughness expression about the real-time flexibility of a DCB test piece are established by utilizing an internal mechanical relationship between a layering length and the flexibility of the DCB test piece; theproblems that interlayer cracks need to be tracked in a layering test and the layering length under the current load needs to be recorded in real time are solved; the method is suitable for testing the I-type interlayer fracture toughness of the continuous fiber reinforced polymer matrix composite laminate, the operation process is simple, and engineering application is convenient to achieved; andmoreover, the method is particularly suitable for continuous fiber reinforced polymer matrix composite laminates, such as continuous fiber reinforced polymer matrix composites of carbon fibers, glassfibers, aramid fibers and the like.

The invention discloses a co-curing forming method for a T-shaped stiffened wallboard composite material. According to the method, an L-shaped preform, a C-shaped preform and a prepreg twisted strip are combined through a combined forming tool formed by combining a metal mold tool and a pressure transmission soft mold tool and then assembled on the forming tool, autoclave co-curing operation is conducted after packaging, and finally the designed T-shaped stiffened wallboard composite material is obtained. By means of the method, the problem that during traditional co-curing forming, forming pressure transmission, T-shaped rib position precision and molded surface precision are difficult to consider at the same time can be solved, the method ensures that prepreg lamination forming of all positions of T-shaped ribs and skin is fully dense under a precise reference benchmark, and the forming precision, quality and forming efficiency of the T-shaped stiffened wallboard composite material are improved.

The invention discloses a microchip laser capable of preventing pump light from bleaching a passive Q-switched crystal. The microchip laser comprises a pump source, a pump coupling system, a gain medium, an ASE suppression crystal, the passive Q-switched crystal, the pump light and a laser separation structure. A 45-degree angle structure is cut on one side of the microchip laser, pump light and laser are separated through a film on the side, and bleaching of the passive Q-switched crystal by the pump light is avoided. Through hot bonds and technologies, the crystals are effectively and firmlycombined, the stability of the laser can be improved, and miniaturization of the microchip laser is facilitated. And the bonding interface of the bonded crystal is stable, thereby being beneficial toheat dissipation of the crystal. The microchip laser is widely applied to other solid-state lasers for distance measurement, the purposes of miniaturization, large energy and narrow pulse width are easy to achieve, and engineering application is easy to achieve. Pump light is completely prevented from entering the saturable absorption Q-switched crystal, so that the problem of pump bleaching is avoided, the monopulse energy output by oscillation laser is improved, and the pulse width is reduced.

The invention discloses a metal-based energetic fragment with impact reaction activity and a preparation method of the metal-based energetic fragment. The preparation method comprises the following steps: obtaining mixed powder formed by coating micron nickel powder with nano aluminum powder; performing vibration mixing on the mixed powder, metal oxide powder and microcrystalline wax to obtain an intermediate mixture; adding an organic solvent into the intermediate mixture for wet ball milling, and then drying to obtain a precursor; and carrying out compression molding on the precursor, and then carrying out sintering treatment to obtain the energetic fragment. The obtained energetic fragment is high in strength and good in plasticity. Meanwhile, the energetic fragment has good penetration and chambering capacity, and the impact reaction activity is remarkably improved.

The invention discloses a high-chromium cast iron wear-resistant coating selective surfacing method and device. The method comprises the steps that a to-be-welded base metal is placed on the upper surface of a copper pipe of a circulating water cooling device, wherein the circulating water cooling device comprises a copper pipe cooling device and a cooling circulating system, the cooling circulating system is provided with a water outlet and a water inlet, and the two ends of the copper pipe respectively communicate with the water outlet and the water inlet of the cooling circulating system; the circulating water cooling device is started, so that cooling water flows between the copper pipe and the circulating water cooling device; the to-be-welded base metal is placed on the copper pipe,the to-be-welded base metal is taken as a matrix, and surfacing of high-chromium cast iron wear-resistant coating is carried out on the upper surface of the to-be-welded base metal; and in the surfacing process, the to-be-welded base metal is in direct contact with the cooling circulating system, and the cooling speed of a surfacing layer and the heat dissipation direction during cooling in the surfacing process of the high-chromium cast iron are controlled so as to control the growth direction of carbide, so that a main wear-resistant phase in the high-chromium cast iron wear-resistant coating, namely the carbide, grows vertical to the surface of the base metal. The method and the device have the advantages of being good in machining effect, and high in machining efficiency.

The invention relates to a super-lubricity performance metal/hydrogen-containing carbon composite thin film. The composite thin film comprises a hydrogen-containing carbon thin film deposited on a base material or the surface of a part and a metal thin film (gold, silver, copper and the like) deposited on the surface of the hydrogen-containing carbon thin film, wherein the carbon thin film is thehydrogen-containing carbon thin film with the hydrogen content of 15% to 28%, the thickness is 800 nm, and the thickness of the metal thin film is less than or equal to 100 nm. A target thin film containing hydrogen carbon is prepared by plasma chemical vapor deposition, and magnetron sputtering and the like, then metal is loaded through a high power micropulse magnetron sputtering or evaporationplating mode, and the super-lubricity performance metal/composite thin film containing hydrogen carbon can be obtained. In a friction process, the metal can catalyze amorphous hydrogen-containing carbon to form sequential multilayer graphene structures, and incommensurate contact of the multilayer graphene structures can achieve super-lubricity in a macro-scale atmospheric environment, an inertiaatmosphere, and vacuum. As a result, engineering application of a super-lubricity technology under the condition of cross-environment can be expected to achieve.

The invention discloses a phase extraction-based no-color difference three-dimensional character image processing method. The method comprises steps: image acquisition is carried out, a laser scanning galvanometer is used for reflecting in a time sharing mode laser strips transmitted by a single-line laser on the surface of the three-dimensional character, a camera is then used for acquiring distorted light strip images, the distorted light strip images are stacked, and a raster image with a three-dimensional character topological structure is obtained; phase extraction is carried out on the obtained raster image on the basis of fourier transform, phase unwrapping is carried out on the extracted phase, an absolute phase of the three-dimensional character is obtained, absolute phase calculation is carried out on the background, the relative phase of the three-dimensional character is obtained according to the absolute phase of the three-dimensional character and the absolute phase of the background, the relative phase replaces the gray value of the character, and the gray image of the three-dimensional character is obtained through reconstruction. Compared with the prior method, stability is higher, the extraction process is simpler, the efficiency is higher, and engineering application is more easily realized.