57results about How to "Meet the design and use requirements" patented technology

The invention relates to a welding method of high-strength steel for a pressure steel pipe of a 610MPa hydropower station, belonging to the technical field of steel pipe welding. In the method, a constant-strength low-hydrogen electric welding rod is used for priming, and a constant-strength matched welding rod is adopted to continuously weld and fill a weld pass by adopting a submerged-arc welding method, wherein the welding line energy is strictly controlled to be about 30-40kJ/cm, and the interpass temperature is controlled to be 100-150 DEG C; and after welding, an aluminum silicate plate is used for covering a welding joint for slow cooling so as to realize the welding of a steel plate for a steel pipe for a 610MPa hydropower station without preheating before welding and heat treatment after welding. The method solves the problems that the traditional steel for the pressure steel pipes of the 610MPa hydropower station needs to be preheated before welding and subjected to stress relief heat treatment after welding, and the welding efficiency is low.

The construction method of large size cement concrete road slab includes connecting formwork without crack in the joints, using blended concrete material with fiber, water reducing agent or swelling agent, completing spreading, vibrating and other steps at 5-38 deg.c within 60-120 min after the concrete material is discharged from the stirrer, spreading in wind speed less than 2 m/s and relative humidity higher than 60 %, adopting twice vibrating, face work for 3-4 times, twice crack cutting, and spraying film and adding protecting layer for curing after surface grain treatment. The said construction method can ensure the road quality, reduce side cracks between slabs, reduce the damage of road slabs caused by foreign matter and water, lower the road maintaining cost and prolong the service life of road.

The invention discloses a method for rolling and shaping a structural steel high cylindrical ring forged piece. The method is used for rolling and shaping the high cylindrical ring with thin wall and excellent texture and performances. The technical scheme is as follows: firstly sheathing a preheated follow-up die sleeve and a structural steel pre-rolled billet which is heated to the deformation temperature into a ring rolling mill, and positioning two workpieces through a main roller, a core roller, holding rollers, an upper conical roller and a lower conical roller of the ring rolling mill; and further starting the ring rolling mill, enabling the core roller to do feed motion to the main roller along the radial direction, rolling the pre-rolled billet in the follow-up die sleeve by 180KN-3800KN rolling force together with the main roller, enabling the pre-rolled billet to expand the width along the radial direction at the speed of 6mm/s-15mm/s and gradually reduce the wall thickness, and rolling the pre-rolled billet into the high cylindrical ring forged piece after the deformation amount achieves 30%-50%, wherein the upper and the lower conical rollers and the two holding rollers can be prevented from moving outwards along with the radial width expansion of the pre-rolled billet during rolling. The minimum value of the wall thickness of the structural steel high cylindrical ring forged piece which is rolled and shaped by adopting the method is 25mm, the maximum value of the height-thickness ratio is 25mm, and the forged piece is mainly used for cylindrical housings and other rotary parts used in the fields of aviation, spaceflight and the like.

The invention discloses a rolling and forming method of a cobalt-base superalloy high cylindrical ring forging, which is used for rolling and forming the high cylindrical ring forging with thin wall and excellent texture and performance. The technical scheme of the rolling and forming method is as follows: putting a preheated follow-up die sleeve and a pre-rolled titanium alloy blank which is heated at deformation temperature into a ring rolling mill; positioning two workpieces by the main roller, the core roller, the snubber rollers, the upper cone roller and the lower cone roller of a ring rolling mill; then, starting the ring rolling mill; carrying out feed movement on the core roller of the ring rolling mill toward the main roller along with the radial direction; rolling a pre-rolled blank in the follow-up die sleeve at the rolling force of 420-4600KN by the core roller and the main roller to cause the pre-rolled blank to widen at the speed of 2-10mm/s along with the radial direction; and when wall thickness is gradually reduced and after the deformation amount of the re-rolled blank is 20-40%, rolling the re-rolled blank into the high cylindrical ring forging, wherein an upper cone roller, a lower cone roller and two snubber rollers do not move outwards along with the radial widening direction of the pre-rolled blank. The minimum wall thickness of the titanium alloy high cylindrical ring forging rolled and formed by the method is 25mm, and the maximum height to thickness ratio is 25mm. The cobalt-base superalloy high cylindrical ring forging is mainly used for revolved body parts, such as cylinders and the like used in the fields of aerospace and the like.

The invention discloses a method of rolling titanium alloy rectangular ring blanks into special-shaped thin-walled rings. A mandrel reasonable feeding manner is provided to achieve a continuous, stable rolling process; titanium alloy rectangular ring blanks are reversely designed according to the shape and size of titanium alloy special-shaped thin-walled rings; accordingly, the titanium alloy rectangular ring blanks are rolled into the special-shaped thin-walled rings. The method is mainly applied to forming the titanium alloy special-shaped thin-walled rings in the fields of aerospace, industrial machinery and the like.

A bearing ball is made from ceramet with following weight percentages of nickel powder 15-25%, molybdenum powder 5-15%, and titanium carbide nitride powder as the rest. The process of the bearing ball comprises mixer-granulating raw powders on a tumbling ball mill by using absolute ethyl alcohol as mixing agent, adopting 6:1of ball-to-powder weight ratio, mixing powders for 48h, and granulating 40 meshes by rubbing a sieve, and then pressed green compacts on a hydraulic press through adopting a steel die with green compact density of 2.5-3.0g/cm3, shaping on a cool isostatic press with 200MPa of isostatic cool pressing pressure for 2 min, sintering on an atmosphere pressure sintering furnace with 1400-1450 DEG C of sintering temperature for 1-1.5h, using 1.5-3 MPa of the atmosphere pressure. The bearing ball which is made from ceramet is significantly superior to the traditional bearing steel material under the conditions with high speed, high temperature and corrosion, and is obviously superior to silicon nitride ceramics material in regard to manufacturing and processing costs and difficulty respect, which has spreading application space in operating modes with high speed, high temperature, corrosion and the like.

The invention discloses an assembly welding technology of the lifting frame of a heating furnace. The lifting frame of a heating furnace comprises two longitudinal beams, a plurality of crossbeams which are transversely connected between the two longitudinal beams, and a plurality of oblique beams which are connected between the crossbeams; the assembly welding technology comprises one step, two steps, three steps or four steps selected from the following four steps: A) uniformly assembling and marking the two longitudinal beams, welding them, and subjecting them to a vibration stress relief process after welding; B) reversely assembling the integral body, utilizing holes in rollers assembled on the longitudinal beams to determine the positions of the holes of roller fitting seats on the longitudinal beams, and satisfying each dimensional requirement after welding and assembling rollers; C) preassembling and grinding the crossbeams and oblique beams, to ensure the vertical dimension of the frame; D) processing holes on connecting positions by matching drilling manner. The invention ensures the overall dimensions of the whole frame to meet the design and use requirements, and improves production efficiency and product quality greatly, moreover, saves working hours and time of assembling and debugging.

The invention relates to a flame-retardant composite material floor with a sound isolating function and a preparation method thereof. The composite material floor comprises skin, a core material and adamping rubber layer, wherein the damping rubber layer is arranged between the skin and the core material and is separately connected to the skin and the core material in a bonding manner; the skin is prepared from a continuous fiber enhanced phenolic resin prepreg; the damping rubber layer is prepared from a polybasic damping rubber material by taking nitrile rubber as a base body; the core material is prepared from an aramid fiber paper honeycomb or a structural foam plastic. The composite material floor disclosed by the invention is simple in preparation process and good in economical benefit, and has the characteristics of being light in weight, load-bearing, environmental corrosion resistant, impact resistant and excellent in bending and compressing properties and the like. In particular, the sound isolating ability of the integral floor can reach up to 33dB which is remarkably higher than that of a conventional composite material floor. The composite material floor meets the demand on sound isolation and noise reduction in a traffic vehicle compartment, and the released smog and toxic gas are relatively low, and the flame-retardant composite material floor is excellent in flame retardance and can be fully popularized and applied to the field of rail traffic.

The invention discloses a method for rolling a rectangular die block steel ring blank into an abnormal-shaped thin-wall ring member. With the purpose of continuous and stable operation in a rolling process, a reasonable feeding type of a core roller is provided, the rectangular die block steel ring blank is designed according to the shape and the size of the abnormal-shaped thin-wall ring member in a backward reasoning mode, and therefore the rectangular die block steel ring blank is rolled into the abnormal-shaped thin-wall ring member. The method is mainly used for forming of the abnormal-shaped thin-wall ring member in the fields of aviation, aerospace, industrial machinery and the like.

The invention discloses a method for rolling and forming TC11 titanium alloy thin-walled rings, which is used for rolling and forming thin-walled rings with high size precision and good organization and performance. The method comprises the following steps: firstly, nesting a pre-rolled titanium alloy billet which is heated to a deformation temperature and a preheated follow-up die sleeve into a ring rolling mill, and positioning the two workpieces by a main roller, a core roller, a holding roller, an upper cone roller and a lower cone roller of the ring rolling mill, wherein the follow-up die sleeve is nested in the pre-rolled billet; and then, starting up the ring rolling mill to enable the core roller to make a feed motion radially towards the direction of the main roller and roll the pre-rolled billet together with the main roller by the rolling force of 200KN-4000KN under the support of the follow-up die sleeve, so that the width of the pre-rolled billet is expanded radially at a speed of 5-10mm/s, the wall thickness of the pre-rolled billet is gradually reduced, and after the deformation of the pre-rolled billet reaches 25%-45%, the pre-rolled billet is rolled into a thin-walled ring. The minimum value of the wall thickness of the titanium alloy thin-walled ring rolled by the method is 25 mm, and the maximum value of the height-to-thickness ratio thereof is 25 mm. The ring is mainly used for components of revolved bodies such as cylindrical shells and the like used in the fields of aviation and the like.

The invention discloses an assembling and welding process of an inclined rail seat of a stepping type heating furnace, which comprises the following steps of: manufacturing a plurality of inclined rail seats; identifying one of the inclined rail seats; after inclined rail seat is identified and qualified, identifying to be a standard inclined rail seat; processing other inclined rail seats by adopting the standard inclined rail seat as a tooling of other inclined rail seats; and drilling and mounting antiskidding ribs at the bottoms of all the inclined rail seats. The invention can overcome the defects of low size precision and low yield in relevant technology and improve the required accuracy of an angle of the inclined rail seat.

The invention discloses a fabricated tower footing which consists of a bottom foot plate which contacted with the ground, an arch shell and a pile cap ring beam arranged at the top. The arch shell is arch-shaped and the angle Alpha between the arch shell and the bottom foot plate is 45-75 degrees; the thickness of the arch shell is 150-200mm; and the bottom foot plate is annular. The entire tower footing is divided into four identical parts along the axial section, and when the tower footing is used, the four parts are fabricated in the shape of the arch shell to form an integral body. The tower footing is added with a counterweight equilibrium and stabilizing column foot according to design; and the tower footing can be dismantled, can be used repeatedly for multiple times, is strong in adaptability, simple to dismantle and assemble, resources are saved and waste is reduced.

The invention relates to a 600Mpa level weather-proof bolting steel self-corrosion matching method for a transmission tower, and belongs to the technical field of weather-proof bolting steel for a transmission tower frame. The method comprises the steps that firstly, high-strength bolting steel which meets the use requirements of the 600Mpa level transmission tower frame and has high atmosphere environment corrosion resistant and fire-resistant performance is selected, wherein the weight percent of Cr, Ni and Cu elements meets the formula that 1/2[Cr]+1/6[Ni]+1/3[Cu]+2/5[Cu].[Ni]-1/5[Cr].[Ni]-2/5[Cu].[Cr].[Ni] is greater than or equal to 0.45 but is smaller than or equal to 0.55; the self-corrosion coupling current of the produced high-strength screw bolt and matched angle iron is controlled to be within +/-20muA. The method has the advantages that the method is used for the matched connection use of a coating-free iron tower structure; excellent atmosphere corrosion performance and self-corrosion matching performance are realized.

The present invention discloses a preparation method for a high-boron stainless steel plate. The preparation method comprises: powder encapsulation, namely loading a high-boron stainless steel alloy powder meeting the requirements on chemical components into a frame box, compacting by vibrating such that the box is full of the powder, and covering the box with a cover plate for welding encapsulation; free forging, namely placing the encapsulated frame box into a high-temperature furnace to undergo heating, warming, and temperature preservation, and then carrying out free forging to obtain a thick plate; hot rolling, namely placing the forged thick plate into the high-temperature furnace again to undergo heating, warming, and temperature preservation, and then carrying out hot rolling to obtain a thin plate of a desired thickness; and profile processing: subjecting the hot-rolled plate to frame removal, solid-solution treatment and straightening, thereby obtaining a finished plate with boride uniformly distributed in austenite and having a density of 97-99%T.D. The finished plate manufactured according to the preparation method for a high-boron stainless steel plate has the same excellent properties as a plate manufactured by means of a process in the prior art, but is lower in requirements on equipment and also lower in manufacturing cost.

The invention relates to a ceramic matrix composite satellite lightweight structural member surface flatness treatment method and a ceramic matrix composite satellite lightweight structural member, and aims to solve the problems that the flatness requirement is difficult to meet by general machining and high-precision scraping cannot be performed due to relatively high material hardness of the ceramic matrix composite satellite lightweight structural member, the processing difficulty is increased, and the product quality is difficult to guarantee. The ceramic matrix composite satellite lightweight structural member surface flatness treatment method comprises the following steps: carrying out preliminary machining, cleaning and drying on the surface of the ceramic matrix composite satellitelightweight structural member; smearing a glue solution prepared from epoxy resin glue on the surface of the ceramic matrix composite satellite lightweight structural member; carrying out super-finish machining on the surface of a glue layer after the glue solution is cured to form the glue layer; and finally, scraping to enable the surface flatness of the structural member to meet the requirement. The structural member manufactured through the ceramic matrix composite satellite lightweight structural member surface flatness treatment method has the advantages that the surface flatness meetsthe design and use requirements, and the performance is good.

The invention relates to a lens, a camera lens and an image device. The lens comprises an optical part (1) and a fixing part (2) which surrounds the optical part (1) and is connected with the opticalpart (1), the optical part (1) is made of transparent materials, and the fixing part (2) is made of ray adsorption materials. The lens can effectively eliminate stray light and improve imaging quality, the use amount of light isolation sheets can be reduced when the lens is assembled to the camera lens so as to be favorable for reducing the accumulation assemblage errors of the camera lens, imaging quality is further improved, meanwhile, the lengths of a lens cone can be reduced, and the volume of the lens is reduced.

The invention relates to a long-wave infrared imaging optical system. The system is sequentially provided with a window W1, a lens L1, a lens L2, a lens L3 and a CCD window W2 which share the same optical axis in the light propagation direction. The lens L1 and the lens L3 are positive meniscus lenses, the lens L2 is a negative meniscus lens, and the convex surfaces of the lens L1, the lens L2 and the lens L3 face the light incidence direction; the front surface of the lens L1 is a spherical surface, and the rear surface is an even-order aspheric surface; the lens L2 and the lens L3 are spherical lenses. The system is greatly simplified, the overall weight of the imaging system is reduced, and the imaging quality of the optical system can be close to the diffraction limit within the temperature range of-40 DEG C to 60 DEG C.

The invention relates to the technical field of air delivery regulating systems, in particular to an air-conditioner plenum chamber arranged in a sandwich space below a seat floor system. The air-conditioner plenum chamber comprises a plurality of sandwich panels or a plenum chamber cavity structure and a fixing structure, wherein the plenum chamber cavity structure is formed by the sandwich panels and the inner wall surface of the sandwich space and arranged in the sandwich space, and the fixing structure is arranged in the sandwich space and used for fixing the plenum chamber cavity structure. The air-conditioner plenum chamber not only can ensure the design requirements of an air conditioner, but also is simple to construct, convenient and rapid to mount, reasonable in cost and suitable for being used in design of the air conditioner air delivery below the seats of places, such as large venues.

A hollow glass assembly capable of automatically adjusting air pressure comprises an outer layer plate and an inner layer plate. The outer layer plate and the inner layer plate are fixedly connected through fixing frames and form a hollow cavity. The fixing frames and the outer layer plate are in airtight connection. One or more through holes are formed in the fixing frames. The hollow cavity is provided with a sealing plate and one or more elastic connecting devices which can deform; the sealing plate is in airtight connection with the outer layer plate or the fixing frames through the elastic connecting devices to form an airtight cavity with the volume being changeable; and a communicating cavity, except the airtight cavity, in the hollow cavity communicates with outside air through the through holes. A hollow glass window capable of automatically adjusting the air pressure can adapt to the problem of internal and external pressure difference, faced by hollow glass, caused by elevation change in the railway train running process, the weight of the glass is reduced as much as possible, energy is saved, consumption is reduced, and the service life can reach 20-30 years.

The invention provides a method for accurately straightening a spindle of a centrifugal compressor in a cold state. The method for accurately straightening the spindle of the centrifugal compressor inthe cold state comprises the following steps that a suitable-size straightening press is selected; a set of auxiliary straightening tools is designed and manufactured, the auxiliary straightening tools are adopted to clamp the spindle, and press straightening treatment is carried out by using the press; during the straightening process, the deflection variation quantity in spindle straightening engineering is measured; and after straightening is completed, vibration aging equipment is used for eliminating the residual stress after spindle pressing. According to the method for accurately straightening the spindle of the centrifugal compressor in the cold state, a precision straightening tool, an overvoltage prevention protective device, a precision measurement tool and bill during the straightening process, and subsequent schemes for eliminating cold deformation residual stress are designed, The method for accurately straightening the spindle of the centrifugal compressor in the cold state can be applied to straightening of the plastic deflection deformation produced in the production process of the spindle of the centrifugal compressor under different working conditions and materials, and ensure that the straightened spindle fully meets the design using requirements.

The invention discloses a method and device of testing the performance of a mechanical rotary spare wheel up-down regulator. The spare wheel up-down regulator comprises a rotating shaft and a winding lifting part. One end of the winding lifting part is fixed to and wound around the rotating shaft, and the other end of the winding lifting part is the free end connected with a weight test piece. The method comprises the steps of controlling a motor to drive the rotating shaft to rotate and enabling the weight test piece to ascend or descend; when the weight test piece ascends or descends by a unit length, controlling the motor to stop driving the rotating shaft; detecting whether any component in the spare wheel up-down regulator is deformed or clamped; when no deformation or clamping is detected, carrying out the above steps, and when the weight test piece ascends or descends by the unit length of a certain number, determining that the performance of the spare wheel up-down regulator is qualified. According to the scheme, the performance of the spare wheel up-down regulator can be tested, and therefore whether produced spare wheel up-down regulators are qualified can be determined.