374results about How to "Improve tissue performance" patented technology

The capture component of tissue retrieval apparatus is strengthened to improve its structural integrity when utilized within very dense tissue. Eyelet structures carrying pursing cable are improved through the utilization of slightly expanded constant widths with diminished lengths to avoid fold back phenomena. The pursing cables employed with the capture component exhibit more than a 100% improvement in tensile strength at high electrosurgical cutting temperatures through the utilization of strands having about a 1.4 mil diameter formed with a type 316 stainless steel.

The invention relates to a selective laser melting forming molten bath real-time monitoring device and a monitoring method, and belongs to the technical field of 3D printing additive manufacturing. The selective laser melting forming molten bath real-time monitoring device and the monitoring method can monitor the molten bath temperature, the shape and the area in the SLM forming process in real time, conduct online assessment on the forming precision and the laser power and feed back the result. According to the adopted technical scheme, a melting forming laser system and a pulsed laser are arranged on the top of a forming cavity, a piece of transparent glass is arranged in the center of the top of the forming cavity, a laser lens tube is arranged above the transparent glass, and the pulsed laser is connected with the laser lens tube through an optical fiber. A lifting frame is arranged in the forming cavity, lifting mechanisms are arranged on the two sides of the lifting frame, and cameras are arranged at the bottom of the lifting frame in the mode of different angles. The melting forming laser system, the pulsed laser, the lifting mechanisms and the cameras are connected with a master control system. The selective laser melting forming molten bath real-time monitoring device and the monitoring method are widely used for real-time monitoring of a selective laser melting forming molten bath.

The invention provides a three-dimensional surface shot peening jet electrodeposition manufacturing method and device. According to the manufacturing method and device, a deposition solution and hard particles are mixed and deposit on a conductive substrate in a spraying manner, so that the rapid manufacturing technology of electrodeposition is realized, the growth rate of grains in the electrodeposition process is slowed down, the purpose of refining the grains is reached, and the quality of a deposition layer is dramatically improved; with combination of the shot peening strengthening technology and the electrodeposition technology, the defects of loose texture, pockmarks, pits and the like of the deposition layer caused by single electrodeposited cathode hydrogen evolution and impurity adhesion can be effectively overcome, and the hardness and the compactness of the deposition layer are improved; meanwhile, by introducing a five-axis linkage numerical control machining system, processing formation of a three-dimensional space can be realized, and the uniformity and the shape accuracy of the deposition layer are improved; and the technology can be widely applied to production of noble metal devices and parts in complex shapes and can also be used for surface rapid coat-plating, a strengthening technology and the like.

The present invention belongs to the technical field of non-ferrous metal processing, and particularly relates to a production and heat treatment method of a 5052 aluminum alloy continuous-casting continuous-rolling billet. The production and heat treatment method comprises steps such as smelting, continuous casting, continuous rolling, coiling and heat treatment, and is characterized in that the Hazelett continuous-casting continuous-rolling process is used after the smelting, and the smelting step comprises three refining and concretely comprises material preparing, aluminum alloy liquid smelting, first refining, slag skimming, alloy element adding, second refining, alloy component adjusting, third refining, degassing filtration, and standing. With the production and heat treatment method of the present invention, the key technology that the Hazelett process is adopted to produce the 5052 aluminum alloy plate material and perform the heat treatment is solved, the blank of the production process is filled up, and the high economic benefits and the high practical values are provided.

The invention provides a metal diaphragm storage box made of carbon-fiber composite materials and a manufacturing method thereof. The metal diaphragm storage box comprises a liner 1 and a metal diaphragm 2 and also comprises an insulating layer 3 and a carbon-fiber composite material layer 4, wherein the liner 1 comprises an upper flange 11, an upper hemisphere 12, a connecting ring 13, a lower hemisphere 14 and a lower flange 15; the upper hemisphere 12 and the lower hemisphere 14 are connected by the connecting ring 13; the upper flange 11 is connected with the upper hemisphere 12; the lower flange 15 is connected with the lower hemisphere 14; the metal diaphragm 2 is butted with the connecting ring 13; the outer surface of the liner 1 is coated with the insulating layer 3; the outer surface of the insulating layer 3 is wound with the carbon-fiber composite material layer 4, and is connected with the carbon-fiber composite material layer 4 in a bonding manner. The metal diaphragm storage box provided by the invention has the advantages that the problems of large weight and low structure efficiency of the metal diaphragm storage box are solved, the light-weight design of the metal diaphragm storage box is realized, the cost is reduced and the performance of a product is improved.

The invention relates to a short-process preparation method of a multi-layer metal composite plate and belongs to the technical field of short-process preparation of metal composite plates. The technology is characterized in that a corresponding centrifugal casting composite tube blank is chosen through calculation according to the innerlayer and outerlayer components and dimensional requirement of a finished product; the composite tube blank is dissected into 2 to 10 tile shapes along the direction of a vertical axis, with a fan-shaped cross section, and the central angle Alpha is 40 to 120 degrees; the blank cut is put into a heating furnace to be heated with the heating temperature of 1050 to 1280 DEG C and the time at maximum temperature of 0.5 to 5 hours; composite plates with various specifications are manufactured through hot rolling transformation; and a sheet metal is continued to be cold-rolled and transformed to produce the sheet metal with the thickness of 0.1 to 3mm. The technology is short in process, simple in operation, and high in bonding strength of layers of the composite plate produced and eliminates the nonuniform phenomenon of interface organization through the technologies of heating and transformation.

The invention discloses a lost foam casting production low-carbon steel upper core disc and impact seat processing method. The method comprises the following steps: making foam polystyrene EPS into a foaming member, which has the same shape as a cast and is a little bigger than the cast; painting a plurality of fireproof coatings on the surface of the foaming member, placing the foaming member in non-adhesive moulding sands, carrying out casting on the foaming member, wherein during the casting process, the foam polystyrene EPS foaming member is burnt and gasified under the assistance of vacummizing and vibration during the casting process, and finally the molten liquid replaces the foaming member as the cast. The lost foam technology is used to manufacture upper core disc and impact seat, is capable of reducing the metal tissue defects and improving the compactness and anti-fatigue strength of metals, moreover has the advantages of high precision in size, reducing on cleanness, reduced processing time, compact tissue of products, suitability for massive production, and high automation, can greatly improve the operation environment, and has greater advantages and a vaster prospect, compared to the conventional manufacture technology of upper core disc and impact seat.

The invention relates to A2B7 type RExYnNiz-a-bMnaAlb hydrogen storage alloy. The alloy is good in pressure-composition-isothermality, and has a maximum hydrogen storage amount of up to more than 1.36 wt.% under usual conditions. The alloy of the invention has better electrochemical performance as a hydrogen storage electrode and better gas-phase hydrogen absorption and desorption performance as a hydrogen storage material than traditional LaNi5 type hydrogen storage alloy; the alloy contains no magnesium element in the composition, so the preparation method of the alloy is simple and safe when compared with that of traditional rare earth-magnesium-nickel-based A2B7 type hydrogen storage alloy.

The invention provides an additive manufacturing method for an electric arc filler wire and a device. The device comprises a control module, a manufacturing module and a power module which are connected mutually. The control module is used for controlling the manufacturing module to be operated to manufacture a product, and controlling the power module to supply the power. The power module is used for, under the control of the control module, outputting compound superaudio frequency pulse current to the manufacturing module so as to provide a heat source to the manufacturing module. The added compound superaudio frequency pulse has the remarkable modulating action to GTAW electric arc, the electric arc shrinkage is remarkable, the electric arc force is greatly improved, the fusion penetration rate of the settled layer is improved, the side surface roughness of the settled layer is reduced, and the forced vibration of the liquid metal in a weld pool can be caused by the electric arc ultrasound effect, so the liquid metal flow is a double-circle flow mode, the air hole defect is reduced, the gain structure is refined, and the component performance is improved.

The invention discloses a control method for bearing steel network carbides and banded carbides and bearing steel. The temperature of a finishing pass during hot rolling of the bearing steel is controlled to be within the range of 830 to 870 DEG C, and a large number of carbides are prevented from being separated out; then cooling equipment is utilized for performing water cooling on eventually rolled bar materials, the temperature of the bar materials is made to rapidly pass through the temperature range being 700 to 850 DEG C, the carbides are forcefully inhibited from being separated out, and the proportion of cementite in pearlite is increased; and meanwhile, the temperature of the bar materials after water cooling is controlled to be 600 DEG C to 650 DEG C, and a bainite or martensite structure is prevented from being generated. Production proves that the effect on reducing formation of the bearing steel network carbides and banded carbides is remarkable through the method, the grade of the network carbides in the bearing steel is decreased to the second grade or third grade from above third grade in GB/T18254 and the metallographic phase form of the carbides is a semi-net shape or a mass point shape, and the grade of the banded carbides in the bearing steel reaches the first grade in GB/T18254.

The invention provides an Al-Mg-Si system aluminum alloy extrusion profile and a production process thereof, and relates to the technical field of non-ferrous metal material processing engineering. The Al-Mg-Si system aluminum alloy extrusion profile comprises the alloy element components, by weight: 0.65%-0.85% of Si, 0.2%-0.3% of Fe, 0.45%-0.65% of Mg, 0.15%-0.25% of Cu, 0.25%-0.45% of Mn, 0.15%-0.25% of Cr, 0.05%-0.07% of Ti, 0-0.1% of Zn and the balance Al. When the Al-Mg-Si system aluminum alloy extrusion profile is produced, the raw material is prepared according to the composition of the alloy element components and subjected to homogenization treatment, then hot extrusion is conducted, quenching is conducted on line, and aging treatment is conducted finally. According to the production process of the Al-Mg-Si system aluminum alloy extrusion profile, the structure property and the alloy plasticity of the material can be significantly improved, so that the obtained profile has the excellent bending property, the follow-up bending forming requirements are met, and the product yield is increased.

The invention relates to rare earth system hydrogen storage alloy with the general formula of RExYyNiz-a-b-cMnaAlbMcZrATiB. The peak capacity of an alloy electrode is higher than that of LaNi5 type hydrogen storage alloy, and the manufacturing method is simple and safe. The hydrogen storage alloy has the good activation property, the rate discharge capability, and charging and discharging or hydrogen absorption and desorption circular stability, can be used in the wider temperature range, and is small in self discharging. The method can be used for manufacturing a cathode of an alkaline rechargeable battery and a rechargeable battery with the hydrogen storage alloy.

The invention discloses a device and a method for compounding and forming a central flange pipe joint from a pipe blank in a single-step and multi-directional way. The method comprises the following steps of: applying enough pressure on an appropriate pipe billet serving as a blank to make the whole pipe billet plastically deformed; forming a central flange of the pipe joint by upsetting; and inversely extruding to form a small head end part of the pipe joint and positively extruding to form a large head end part of the pipe joint, so metal upwards, downwards and radially flows, the forming force is small, and the number of stations is small. Compared with a cutting pipe joint, the invention has the advantages of high material utilization ratio and production efficiency and good metal flow structure, and is particularly applicable for production of high-pressure pipe joints.

The invention relates to low-cost steel for an automobile beam and a manufacturing method thereof. The steel comprises the following chemical components in percentage by weight: 0.06-0.12% of carbon, 0.08-0.20% of silicon, 1.00-1.40% of manganese, 0.015-0.03% of niobium, less than or equal to 0.015% of phosphorus, less than or equal to 0.008% of sulphur, 0.02-0.06% of aluminium, less than or equal to 0.003% of [O], less than or equal to 0.005% of [N], and the balance of iron and unavoidable micro impurities. In the invention, by optimizing a process route, the problems of long smelting cycle of an LF (Ladle Furnace) and high power consumption for refining can be solved; the alloy production cost is reduced; by means of the process, the electricity consumption per ton of steel is reduced; the total refining cycle is shortened; and the beam steel production with low alloy cost is realized by using an optimized controlled rolling and controlled cooling process system.

The invention provides a steel used for a guttering corrosion resistant high-strength ERW welding socket, and the chemical compositions of which by weight percentage are as follows: 0.15 percent to 0.25 percent of C, 0.05 percent to 0.4 percent of Si, 0.7 percent to 1.5 percent of Mn, less than or equal to 0.1 percent of P, less than 0.005 percent of S, 0.005 percent to 0.03 percent of Ti, 0.005 percent to 0.04 percent of Nb, 0.005 percent to 0.04 percent of V, 0.1 percent to 0.7 percent of Cr, 0.1 percent to 0.30 percent of Cu, 0 percent to 0.003 percent of B, 0.002 percent to 0.04 percent of Al and 0.001 to 0.01 percent of Ca, and the rest are Fe and other unavoidable impurities. The invention also provides a cannula prepared by adopting the steel and a manufacturing method thereof. The steel of the invention has excellent performance of guttering corrosion resistance and does not contain expensive alloying elements such as Mo and Ni and the like, therefore, the cost of the cannula is low.

The invention relates to a bionic cast iron guide rail and a manufacturing method of the bionic cast iron guide rail and a regeneration method of a waste machine tool guide rail. The cast iron guide rail is composed of a guide rail main body and a surface structure refining layer of the guide rail main body. Nanoscale martensite units are distributed on the surface structure refining layer. The manufacturing method of the cast iron guide rail and the regeneration method of the waste machine tool guide rail mainly comprise the following steps of obtaining the surface structure refining layer by using high-frequency electric pulses to process the guide rail, and manufacturing the nanoscale martensite units on the surface structure refining layer by the adoption of laser fusing method. The units and a guide rail parent together form a bionic coupling area which is soft and hard and resembles a living body structure, the units function as firm pile screws or reinforcing ribs which are additionally arranged on the surface layer of the guide rail, and parent materials surround the units and enable the unit to be connected into a whole so as to enable local peak values of the surface of the guide rail to be dispersed and stress of the guide rail to be even. The bionic cast iron guide rail has superior mechanic property and fatigue and abrasion resistant performance.

The invention discloses a roll forming method of a 4340 H steel E-shaped ring forging, which is provided for guaranteeing a forming size of the E-shaped ring forging and preventing the defects of folding, offset, insufficient filling and the like. The method comprises processing steps as follows: a 4340 H steel bar material which is subjected to blanking according to specification is heated to a forging temperature ranging from 1,100 DEG C to 1,140 DEG C and is upset and punched to obtain a primary ring blank on a press machine; then, the primary ring blank is heated to a forging temperature ranging from 1,120 DEG C to 1,160 DEG C and is subjected to inner-bore material gathering to obtain a secondary ring blank on a ring rolling machine; and the secondary ring blank is placed in the ring rolling machine equipped with a main roller die for roll forming after the secondary ring blank is heated to a forging temperature ranging from 1,140 DEG C to 1,200 DEG C, the deformation is larger than or equal to 45%, and the E-shaped ring forging is obtained. The E-shaped ring forging is subjected to quenching and high-temperature tempering thermal treatment after forged, the quenching is that the E-shaped ring forging is heated to 860 DEG C and is subjected to oil cooling after thermal insulation, and the high-temperature tempering is that the E-shaped ring forging is heated to 590 DEG C and is subjected to air cooling after thermal insulation. The forging is mainly used for the field of wind power and mining machinery and the like.