35results about How to "Reduced deformation tendency" patented technology

The invention discloses a novel welding technique for hammering and forging a high-temperature welding line. The novel welding technique for hammering and forging the high-temperature welding line relates to a working table, a stand column, a track cross beam, a servo trolley, elastic cushion blocks, a control cabinet and a pneumatic source. The novel welding technique for hammering and forging the high-temperature welding line is characterized in that an electric welding gun, a gas gun, an heat insulation cover plate and at least one pneumatic impact hammer are installed on the servo trolley and can move in a servo mode on the track cross beam under the control of the control cabinet, and a welding part is fixed on the working table through the elastic cushion blocks. According to the novel welding technique for hammering and forging the high-temperature welding line, the surface of the welding line which is just welded is heated through the gas gun during welding, a weld microstructure in the high-temperature state is hammered and forged contentiously through the at least one pneumatic impact hammer, and finally normalizing treatment is automatically carried out on the hammered and forged weld microstructure after heat insulation is carried out on the hammered and forged weld microstructure in the servo moving process of the heat insulation cover plate. The novel welding technique for hammering and forging the high-temperature welding line has the advantages that the structural compactness of the welding area of a component can be improved, welding stress deformation is reduced, residual stress is relieved, and high-carbon steel and alloy steel can be widely applied to the welding field.

The invention discloses a 7xxx series aluminum alloy sheet and a preparation process thereof. The 7xxx series aluminum alloy sheet comprises the compositions of 1.7-1.9% of Mg, 5.0-6.5% of Zn, 0.25-0.40% of Cu, lass than or equal to 0.10% of Fe, less than or equal to 0.06% of Si, lass than or equal to 0.01% of Mn, less than or equal to 0.01% of Zr, less than or equal to 0.01% of Cr, 0.01-0.03% ofTi, and the balance Al and inevitable elements. The preparation process comprises the following steps that (1), smelting is performed; (2) degassing and filtration are performed; (3) casting is performed; (4) soaking is performed; (5) saw cutting and milling surface are performed; (6) preheating and hot rolling are performed; (7) edge trimming and transverse knife uncoiling are performed; (8) solid solution quenching is performed; (9) stretching is performed; (10) aging is performed; and (11) saw cutting is performed, and aluminum alloy sheet finished products are obtained. The surface hardness of the aluminum alloy sheet prepared by the preparation process is no less than 150HV, no bank mark on the surface after anodizing is achieved, the color is close to that of aluminum metal, and the7xxx series aluminum alloy sheet can be widely used in IT appearance structural parts.

The invention relates to a low-creep zircon overflowing brick and a preparation method thereof. The low-creep zircon overflowing brick comprises, by mass, 100% of zircon powder, wherein zircon oxide short fibers account for, by mass, 0.0-4.0% of the zircon powder, silicon oxide powder accounts for, by mass, 0.1-2.0% of the zircon powder, and composite additives account for, by mass, 0.1-0.8% of the zircon powder. The composite additives can be La2O3, or CeO2, or combination of La2O3 and Y2O3, or combination of CeO2 and Y2O3, or combination of La2O3, CeO2 and Y2O3. According to the low-creep zircon overflowing brick and the preparation method thereof, strength of green bodies is improved, firing shrinkage of the green bodies is reduced, manufacturing yield of products is improved, bonding strength of crystal boundaries of zircon is enhanced, the high-temperature bend-creep rate of products is effectively lowered, and the service life of super-large-size overflowing bricks is prolonged.

The invention belongs to the technical field of metal materials and machining thereof, discloses an Al-Zn-Mn alloy profile for a rail transit vehicle body and a preparation method thereof, and relatesto the technical field of aluminum alloy machining. The alloy comprises the following chemical components of, by mass, 4.4-4.6 % of Zn, 0.1-0.15% of Cu, 0.3-0.4% of Mn, 0.16-0.24% of Cr, 0.04-0.08% of Ti, 0.12-0.20 of Zr, less than or equal to 0.12% of Fe, less than or equal to 0.06% of Si, and the balance Al, wherein the ratio of the mass percentage of the Zn to the mass percentage of the Mg is3.2 to 3.5. The Al-Zn-Mn alloy material prepared through the preparation method has high toughness, corrosion resistance, anti-fatigue and weldable characteristics, and can meet the running requirements of the high-speed rail transit vehicle body.

The invention relates to an anisotropic rare-earth magnet light wave microwave sintering method. Pressed and formed R-Fe-B (R is at least one of rare earth elements) series anisotropic rare-earth magnet green bodies after the completion of magnetic field orientation are placed in a light wave microwave oven, and the combination energy of light waves and microwaves are used for sintering. The frequency of microwaves is 500 MHz to 250 GHz, the atmosphere is vacuum or inert gas, the power of the light waves and the microwaves is proportionally controlled as required, and the sintering temperature is 980 DEG C to 1200 DEG C. The respective heating characteristics of the light waves and the microwaves are used, the heating speed is high, and the temperature gradient in the magnet green bodies is further reduced in sintering; the zero gradient even heating in a larger area in a sintered material can be realized, the grain growth inside the material is even and fine, and the magnetic performance of the finished product can be increased; meanwhile, the invention has the characteristics of low thermal stress, less cracking and deformation, energy saving, environment protection and the like.

The invention provides a beam-free linear electric-machine oil pump, having characters of stable structure, smooth working, high-efficiency energy saving and convenient use and maintenance, applied to oil pumping work in oil field and oil well. Its technical project: it includes main frame, stator fixed on the main frame, rope and rotor linked with the rope, as well as rotor guide rail, rotor guide wheel and spacing commutator, and its character: the stator is a unilateral structure and the rotor adapts to the stator. The rotor is fixed with balance weight box, there is a wind circulating cooling device in the cavity of the rotor, the spacing commutator can movably position, the top end of the main frame is set with head sheave and the main frame can move with the moving base.

The invention relates to a stress deformation control method and device for an electron beam fuse additive manufacturing process. The method comprises the steps that ideal temperature field distribution data S0 for generating minimum thermal stress during additive manufacturing is determined based on material properties and thermal stress generation conditions of additive manufacturing; a metal wire is melted with a first electron gun, and layered forming is performed according to a machining path strategy of a part; a temperature monitoring probe is used for collecting real-time temperature field distribution data S1 of a forming layer; the real-time temperature field distribution data S1 is compared with the ideal temperature field distribution data S0, and when it is judged that S1 deviates from S0, an electron beam is emitted by a second electron gun, after the electron beam is controlled by a scanning coil, the electron beam is irradiated in a spot mode at a position at which thepart to be heated is formed, and when the real-time temperature field distribution data S1 in the forming process is equivalent to the ideal temperature field distribution data S0, the second electrongun and the scanning coil stop working, the first electron gun continues to work until all the layers of the part are formed.

The invention discloses a nickel-based coating on the surface of a sucker rod and a preparation method of the nickel-based coating. The nickel-based coating is mainly prepared from raw materials in aproper ratio, and one coating with high performance, wear resistance and corrosion resistance is obtained on the surface of the sucker rod with an induction cladding technology. The specific implementation method comprises following steps: (1), surface pretreatment of a base material; (2), preforming of the nickel-based coating; (3), drying treatment; (4), preparation of an induction cladding coating. The nickel-based coating forms good metallurgical bonding at a coating interface, and the coating structure is refined and overcomes defects of obvious cracks, gaps and the like. Microhardness from the base material to the coating is obviously improved, coating hardness value is about 5 times higher than that of the base material, wear extent and wear coefficient of the coating are far lowerthan those of the base material under the same condition, so that the service life of the sucker rod is substantially prolonged. Not only can high-performance coating be obtained, but also the methodhas the advantages of low production cost, high efficiency and environment-friendly production process and facilitates realization of industrialization.

The invention discloses a sintering pallet side plate, and relates to the technical field of sintering pallets in the metallurgy industry. The sintering pallet side plate comprises at least two side plates; and a lug boss and a groove mutually matched are arranged between two adjacent side plates. A pair of rabbets formed by the lug boss and the groove is arranged at opposite positions of the two connected side plates. Therefore, when the side plates are assembled, the rabbets have the positioning assistance function, and the assembly efficiency of workers is improved. In the using process, the rabbets limit the deformation direction of the side plates and reduce the deformation trend. Meanwhile, a planar joint face is changed into a curve joint face, so the air leak resistance is increased and the air leak quantity is reduced. Even if the side plates are slightly deformed, the material leak condition can be avoided due to the rabbets. Due to the novel side plate, the service life of the side plate is greatly prolonged, and the production efficiency is improved.

The invention discloses a movable cross beam locking device of a gantry five-axis machine, which comprises a workbench, bases, uprights, second guide rails, a cross beam I, a cross beam II, first guide rails, slide grooves, slide blocks, hydraulic cylinders, brackets, locking platens, bolt holes I, support seats, connecting blocks, arched door posts, bolt holes II, anchor connecting structures, piston rods, inner grooves and bolt holes III. The device adopts the two independent cross beams; the inner grooves of the cross beams are matched with the anchor structures on the connecting blocks; the locking platens wrap the two ends of the cross beams; the hydraulic cylinders allows the piston rods to be propped against the side faces of the locking platen; the bolts are matched with the bolt holes, so that the movable cross beams and the connecting blocks form a whole; a machining precision error due to vibration in a moving process of the cross beams is avoided; at the same time, the arched door posts in the connecting blocks can bear and disperse more stress; and a deformation trend of the cross beams is reduced.

The invention discloses a building assembly embedded wall cabinet and an assembly method thereof, and relates to the technical field of building assembly. The building assembly embedded wall cabinet comprises an inner frame and a detection device, a plurality of bearing plates are clamped on one surface of the inner frame, one surface of the inner frame is movably connected with a top plate, two sides of the inner frame are movably connected with side guard plates, a plurality of fastening edges are clamped on one side face of the inner frame and on one side face of each side guard plate, onesurface of the inner frame is connected with two angle blocks in a matched manner, two sides of the inner frame are connected with a plurality of supporting cores in a matched manner, one surface of each bearing plate is slidably connected with a squeezing block, one surface of each squeezing block is clamped with the corresponding side guard plate, a plurality of ribs penetrate the bearing plates, and anti-bending cores penetrate the two sides of the inner frame. Downward prestress is applied to two sides of each bearing plate by squeezing of the squeezing blocks and a supporting plate, so that the centers of the bearing plates have the trend of bending towards the top plate, part of the gravity of a placed article is offset, and the building assembly embedded wall cabinet has the advantage that durability of the wall cabinet is improved.

The invention relates to a shallow foundation building protection structure close to deep foundation pit engineering and a construction method. The shallow foundation building protection structure close to the deep foundation pit engineering comprises deep pile foundations close to an original shallow foundation building, the upper ends of the multiple deep pile foundations are connected with a connecting beam, and the connecting beam is connected with a ring beam of the original shallow foundation building; and a soil body between the deep pile foundations and a newly-built deep foundation pit support structure is subjected to grouting reinforcement to form a grouting reinforcement layer, sleeve valve pipes are pre-buried at the bottom of the original shallow foundation building, and meanwhile the working procedure of backward mode first and forward mode second is adopted for deep foundation pit engineering construction. According to the shallow foundation building protection structure close to deep foundation pit engineering and the construction method, disturbance of deep foundation pit engineering to the adjacent original shallow foundation building is greatly reduced through an active and passive protection thought, and the effect of improving the stability of the original shallow foundation building is achieved.

The invention relates to a diaphragm type pulsation damper with high pressure resistance, which comprises a first shell and a second shell, a first cavity is arranged in the first shell, a second cavity is arranged in the second shell, a diaphragm piece for isolating the first cavity from the second cavity is arranged between the first shell and the second shell, and the diaphragm piece is arranged in the first cavity and the second cavity. A first limiting block is arranged in the first shell and provided with a first through hole used for being communicated with the first cavity, the first limiting block is provided with a first film protection device, a first reset spring is arranged between the first limiting block and the first film protection device, and a second limiting block is arranged in the second shell and provided with a second reset spring. The second limiting block is provided with a second through hole used for being communicated with the second cavity, the second limiting block is provided with a second film protecting device, a second reset spring is arranged between the second limiting block and the second film protecting device, and the pulsation damper has the good high-pressure-resistant capacity.

The invention relates to a moon-based landing platform and a construction method thereof, in particular to a platform used when a spacecraft lands on the moon and a construction method of the platform, and belongs to the technical field of deep space exploration of the moon. According to the invention, the microwave sintering molding of the multi-component simulated lunar soil material with small particles, light weight and large specific surface area in the aerospace field is realized, the molding precision and density requirements of a spacecraft landing platform are met, a technical basis is provided for subsequent lunar base construction and lasting operation, and good economic benefits and social benefits are achieved.

The invention discloses an electrophoretic deposition-microwave sintering combined processing method for a nickel-chromium baked porcelain denture. The method includes depositing a porcelain layer with a specific thickness on the surface of a nickel-chromium alloy by an electrophoretic deposition method and cladding the porcelain layer on the nickel-chromium alloy by means of microwave heating so as to obtain the nickel-chromium baked porcelain denture. The nickel-chromium baked porcelain denture prepared by the method is uniform in coating and good in bonding force, and accordingly the method can be widely applied to a nickel-chromium baked porcelain denture processing process.

The invention discloses a high-end material high-temperature sintering furnace. The high-end material high-temperature sintering furnace comprises a furnace body, wherein a high-temperature sinteringcabin is arranged inside the upper end of the furnace body; a gear motor is arranged inside the furnace body; the upper side of the gear motor is rotatably connected to a first placement tray througha rotating shaft; a second placement tray is inserted at the upper side of the first placement tray; a third placement tray is inserted at the upper side of the second placement tray; multiple magnetrons are arranged on the two side walls of the high-temperature sintering cabin; a cabin door is arranged at one side of the high-temperature sintering cabin through a hinge; and a control panel is arranged at one side of the lower part of the furnace body. The high-end material high-temperature sintering furnace can calcine lots of materials at a time at a high temperature through the arranged multiple placement trays and the up and down piling of the multiple placement trays; and the placement trays are driven to slowly rotate through the gear motor, so that the uniform sintering treatment isfacilitated, the material cracking caused by local high temperature is avoided, and the rate of finished products of the material high temperature sintering is increased.

Disclosed is an electrophoretic deposition-microwave sintering combined machining method of a titanium bonded porcelain layer. The method comprises the steps that titanium powder and titanium bonded porcelain powder are mixed and ground to form composite titanium bonded porcelain powder, wherein the weight percentage of the titanium powder ranges from 2% to 20%, and the weight percentage of the titanium bonded porcelain powder ranges from 80% to 98%; a composite bonded porcelain layer with a certain thickness is formed on the surface of a dental pure titanium and titanium alloy substrate in a deposition mode through an electrophoretic deposition method; and then the porcelain layer is formed on the material surface of the dental pure titanium and titanium alloy substrate through fusion covering in a microwave heating mode, and therefore a dental titanium baked porcelain artificial tooth is formed. According to the electrophoretic deposition-microwave sintering combined machining method of the titanium bonded porcelain layer, operation is convenient, the technological process is easy to control, material liquid can be recycled, pollutant emission is avoided, the needed facilities are simple, the technological cost is low, and continuous production can be achieved.

The invention relates to a cylinder body which comprises a cylinder cover, an end cap shaft sleeve, a cylinder hole, an anti-oxidation layer, an inner cylinder main body, a water sleeve, an outer cylinder main body, guide rods, a horizontal roller, a connecting piece and perpendicular rollers. The cylinder hole is formed in the inner cylinder main body. The anti-oxidation layer is sprayed on the inner surface of the cylinder hole and can improve the wear resistance and corrosion resistance of the cylinder body. The outer cylinder main body is arranged outside the inner cylinder main body and wraps the inner cylinder main body. The water sleeve is arranged between the inner cylinder main body and the outer cylinder main body. The cylinder cover is located at the upper end of the inner cylinder main body and the upper end of the outer cylinder main body. The end cap shaft sleeve is located above the cylinder cover. The two guide rods are parallel to the outer cylinder main body in the horizontal plane in the mode that the two guide rods surround the outer cylinder main body. The horizontal roller is arranged outside the outer cylinder main body. The perpendicular rollers are arranged at the two ends of the horizontal roller. The cylinder body can be prevented from shaking leftwards and rightwards. Thus, the problems that a cylinder sleeve is prone to deformation and a cylinder hole is prone to abrasion are solved.