149results about How to "Internal stress relief" patented technology

The invention discloses a COG (Chip On Glass) bonding method. The COG bonding method comprises attaching a Polaroid to a glass panel after the glass panel is cleaned and fixing an ACF (Anisotropic Conductive adhesive Film) on the glass panel; performing the pre-bonding treatment of the COG bonding process and fixing an IC (Integrated Circuit) on the ACF; performing the segment main bonding treatment of the COG bonding process and performing the complete curing on the IC and the glass panel. The invention also provides a temperature control device. According to the technical scheme of the COG bonding method and the temperature control device, the process of the COG bonding process is achieved through the segment main bonding process and accordingly the IC and the glass panel can have the same swelling amount and accordingly the badness can be avoided.

The invention relates to a NaNbO3 phase containing Na2O-K2O-Nb2O5-SiO2 low dielectric loss energy storage glass ceramic material, the microcrystal glass material is prepared by mixing a glass phase and a crystal phase, fusing, cooling and molding, annealing, and conducting crystallization heat treatment; wherein the glass phase accounts for 20% according to mole percent, and the balance is the crystal phase; the crystal phase is prepared by heating and fusing Na2CO3, K2CO3 and Nb2O5 at the molar ratio of x:(1-x):1, wherein x is more than or equal to 0.7 and less than or equal to 1. The dielectric loss of the prepared potassium-sodium niobate based energy storage microcrystal glass material is low; the added Na2CO3 not only has an effect on regulating the composition of the crystal phase ofa potassium-sodium niobate system, but also has a certain effect on promoting the crystallization process, the NaNbO3 phase favorable for the high energy storage density is formed, and the high energy storage density glass ceramic material is finally obtained.

The invention discloses a method for repairing a lining plate-free flat-head cap of a spindle of a rolling mill, which comprises the following steps of: performing stress relief annealing on the lining plate-free flat-head cap to eliminate internal stress, performing induction annealing on a flat potential surface to reduce hardness and tempering the flat potential surface in 2 hours; checking to determine the thickness of a fatigue layer of the flat potential surface and performing dye check to determine that cracks are not generated at all; machining to remove the fatigue layer of the flat potential surface, and performing dye check again to determine that cracks are not generated at all; and performing laser cladding on the flat potential surface by adopting gas-atomized nickel-based alloy powder to ensure that a binding layer of a laser cladding layer and a base body matrix has the mechanical strength of over 90 percent of that of the base body and the hardness of 35HRC, machining the cladding layer into the size matched with that of the spindle of the rolling mill, and performing dye check to determine that the flat potential surface is not damaged. The method can repair failed lining plate-free flat-head cap, recover the effect of the lining plate-free flat-head cap, ensure the automatic control and finished product quality of the rolling mill, reduce maintenance cost, and prolong the service life of the lining plate-free flat-head cap.

The invention provides a fluoride/oxide co-coated positive electrode material which comprises a positive electrode material main body, a composite coating layer and a diffusion doping layer, and is characterized in that the composite coating layer is a continuous coating film formed by uniformly coating the surface of the positive electrode material main body with oxyfluoride; and the diffusion doping layer is formed by diffusing partial metal element ions in the composite coating layer to the surface layer of the positive electrode material main body. The invention also provides a preparationmethod of the fluoride/oxide co-coated positive electrode material. The positive electrode material provided by the invention has relatively good cycling stability, storage life, high-temperature performance and safety performance under high voltage.

A precise U-shaped bending die for magnesium alloy sectional materials is mainly used for processing the magnesium alloy sectional materials. The die comprises an upper die frame and a lower die plate and is characterized in that the rectangular upper die frame consists of an upper crossbeam plate, a lower crossbeam steel pad and two precisely feeding racks, wherein the upper crossbeam plate and the lower crossbeam steel pad are horizontally arranged, the precisely feeding racks are vertically arranged as vertical sides, and the precisely feeding racks are connected to the upper crossbeam plate and the lower crossbeam steel pad; retaining plates are embedded on the outer sides of the precisely feeding racks, grooves are formed between the precisely feeding racks and the retaining plates, and rotating gear discs can slide in the grooves and are meshed with the precisely feeding racks; and two adjustable support wheels, the rotating gear discs and a retainer are arranged on the lower die plate, and a guide wheel and a molding wheel are arranged on each rotating gear disc. The deformation and breakage problems of magnesium alloy are basically solved. Through the fine adjustment of a wheel gap, the gap accuracy of the sectional materials is increased by 50%, and the defective rate is reduced by 80%.

The invention relates to a synchronous high pressure gas bulging forming method for a large size titanium alloy curvilinear generatrix double-layered cone member. High pressure thermal gas bulging forming is carried out on a double-layered cone blank at a special temperature, so that the curved shapes between the inner and outer cones are consistent, the fit clearance is small and a follow-up shape correcting step is not needed. The structure property is regulated then through insulating thermal treatment, the dimensional accuracy is prevented from being damaged by thermal treatment after forming, and the shape accuracy and the structure property are regulated integrally.

The invention relates to the technical field of electronic packaging, in particular to a packaging method for board level fan-out structures. The method includes the steps of copper foil pressing fit, chip surface mounting, medium layer pressing fit, blind hole manufacturing, circuit manufacturing, installed and welded layer pressing fit, ball attachment, stripping and others. According to the packaging method for the board level fan-out structure, two fan-out packaging structures are symmetrically designed on the upper side and the lower side of a core board, and in the manufacturing process, because the upper end and the lower end of the core board are symmetrically and evenly stressed, and a high-temperature annealing mode is adopted for eliminating internal stress before a first double-layer copper foil structure and a second double-layer copper foil structure are stripped, the problem of warping and other mechanical deformation problems will not occur, and the quality and performance of the fan-out structures are guaranteed. In addition, the packaging method for the board level fan-out structures can be used for manufacturing the two fan-out structures at the same time, and therefore production efficiency is improved.

The invention discloses an aluminum profile extrusion process, which is characterized in that the process is as follows: preheating: using a temperature gradient form of heating 85°C/1 hour, heating the ingot cylinder to 380°C-420°C, according to the product Select the appropriate aluminum rod and put it into the ingot tube, heat the aluminum rod to 450-500°C in the form of 90°C/1 hour gradient temperature, and keep it warm for 3-5 hours, choose a suitable mold, and heat the flat mold to 460°C ℃-480℃, heat up to 480-500℃ in separate molds, and keep warm for 4-6 hours.

The invention discloses a sound absorption zeolite particle and a synthesis and preparation method thereof. The method comprises the following steps: adding a silicon source, an aluminum source, a template, an additive and a solvent into a synthesis reaction kettle, and controlling artificially synthesized zeolite crystal growth under high temperature and high pressure conditions for a predetermined synthesis time to reach a predetermined particle size range; carrying out solid-liquid separation by using a filter press and/or a centrifuge to obtain molded synthesized zeolite particles; and sequentially carrying out high temperature roasting, reinforcing balling and particle surface post-treatment on the molded synthesized zeolite particles, and screening to obtain the satisfactory sound absorption zeolite particle. The method adopting the above technical scheme does not need secondary molding, so influences of a bonding agent on the zeolite particles are avoided, thereby the sound absorption zeolite particle has good mass transfer and sound absorption effects when being applied in loudspeaker products; and the required zeolite particle is obtained through the high temperature roasting, reinforcing balling and particle surface post-treatment of the molded synthesized zeolite particles.

The invention relates to a KNN-based (sodium potassium niobate-based) energy storage microcrystalline glass material with ultralow dielectric loss and a preparation method. The microcrystalline glass material is prepared from a glass phase and a crystal phase through mixing, fusing, cooling and molding, annealing, carrying out crystallization heat treatment, wherein according to mol percent, the glass phase accounts for 20 percent to 50 percent and the balance is the crystal phase; the crystal phase is composed of K2CO3, Na2CO3, Nb2O5 and BaCO3 at a mol ratio of (3-x) to (3-x) to 6 to 2x and x is more than 0 and less than or equal to 2.5. The KNN-based energy storage microcrystalline glass material prepared by the preparation method has extremely low dielectric loss; BaO is introduced, has the effect of adjusting the composition of the crystal phase of a sodium potassium niobate system and also has a certain promotion effect on a devitrification process and devitrification is accelerated by rare-earth metal ions; the BaO can also generate a pinning effect, and adverse impacts, caused by interface polarization, on breakdown and worsening are weakened; finally, the microcrystalline glass material with a high dielectric constant is obtained.

The invention discloses a method for preparing a carbon fiber guide wheel for cutting silicon chips and the carbon fiber guide wheel, and belongs to the field of silicon chip processing equipment. The preparation method comprises the following steps: (1) heating resin in a drying oven for 1-2 hours, adding a curing agent, and uniformly stirring in vacuum at a high speed; (2) preheating a metal core mold for 1-2 hours, and lifting the metal core mold on a three-dimensional winding machine for fixation; (3) performing a layer paving design; (4) winding to form the winding angles of carbon fiber yarns layer by layer according to a sequence from the interior to exterior; (5) performing stepped heating and cutting on the metal core mold wound with carbon fibers; and (6) accurately grinding cured carbon fiber tubes to a specified guide wheel size, and performing fixed-length cutting, so as to obtain a carbon fiber guide wheel roller. The carbon fiber guide wheel is manufactured by one-step winding, one-step curing and one-step outer surface machining, the manufacturing process is simplified, the production period is greatly shortened, and the easy layering risk due to repeated winding is reduced. Moreover, the manufactured guide wheel is high in strength, stable in quality and low in cost.

A copper-based bearing pad with a toughened intermediate layer and a preparation method thereof. The bearing pad includes a copper shell, a toughened intermediate layer and a tin-based bearing alloy layer. The preparation method of the bearing pad includes: preparing a copper shell and a tin-based bearing alloy; The surface of the copper shell is degreased, mechanically sandblasted and roughened, cleaned with lye to remove surface oil stains and oxide films, cleaned with absolute ethanol, and then activated with acid to activate the surface of the copper shell; on the inner surface of the treated copper shell Form a toughened intermediate layer with a thickness of 30-100 μm, the composition of the toughened intermediate layer is pure nickel; cast a tin-based bearing alloy layer on the toughened intermediate layer, and set uniform grooves on the inner wall of the tin-based bearing alloy layer , the depth of the groove is 1/5~1/3 of the thickness of the tin-based bearing alloy; finally, cryogenic treatment is carried out on the bearing bush. The present invention avoids the generation of Cu6Sn5 brittle phase from reaction at the joint surface of the tin-based bearing alloy and the copper shell by setting the toughening intermediate layer, thereby improving the bonding strength between the tin-based bearing alloy and the copper shell.

The invention discloses a machine for straightening metal threads. The machine comprises a rack, an operation control mechanism, a transmission mechanism, front straightening mechanism and a back straightening guide mechanism. The machine for straightening the metal threads is characterized in that the front straightening mechanism comprises a rotary drum and a straightening wheel; the straightening wheel is provided with a straightening rod; one end of the straightening rod is in a threaded rod shape; the other end face of the straightening rod is an arc surface; a plurality of screw holes are arranged in the straight line on the two side walls of the rotary drum symmetrical about the axial centerline of the rotary drum; the screw holes are in stagger arrangement at equal intervals; the threaded rod of the straightening rod and the rotary drum are in screwed connection; a plurality of straightening rods are in staggered and embedding arrangement at equal intervals; the end face of the arc surface of the straightening rod is beyond the axial centerline of the rotary drum; and the degrees of the included angles formed by the intersections of the tangency point lines of all adjacent straightening rod arc surfaces and the axial centerline of the rotary drum are equal. The machine for straightening the metal threads has the advantage that the adjustment of the depth or the angle of the straightening rod in the rotary drum is achieved by screwing and unscrewing the straightening rod, so that the application ranges of fine metal threads needing to be straightened are widened.

The invention provides a vinyl ester resin heavy mortar floor which consists of a priming coat, a vinyl ester resin mortar layer and a finish coat layer, wherein the vinyl ester resin mortar layer is directly paved on the priming coat, and an FRP (Fiber Reinforced Plastic) isolation layer is not needed to be manufactured; the once paving thickness of the vinyl ester resin mortar layer is 30-100mm, and the whole vinyl ester resin mortar layer is seamless; the vinyl ester resin mortar layer is prepared from the following raw materials in parts by weight: 1000-1200 parts of quartz sand aggregate, 100-120 parts of vinyl ester resin, 2-3 parts of methyl ethyl ketone peroxide, 1-1.5 parts of cumene hydroperoxide and 1-2 parts of cobalt iso-octoate. The vinyl ester resin heavy mortar floor has the characteristics of high mechanical strength, good load-carrying property, integrally seamless property, excellent anti-permeation property, excellent corrosion resistance property, high construction efficiency and the like, is especially applicable to regions with frequency rolling of heavy machinery, heavy high-altitude falling impact and corrosion caused by the continuous soaking of acid, alkali and saline solutions with relatively high concentrations.

The invention relates to a method and an apparatus for taking up and drawing a multifilament during melt-spinning. In said method and apparatus, the multifilament is guided on driven guiding sleeves of several godets, at least partially going therearound. Several guiding sleeves are heated. One of the guiding sleeves is driven at a circumferential speed exceeding 1,500 m/min so as to take up the multifilament, while at least one guiding sleeve located downstream is driven at least at twice said circumferential speed so as to draw the multifilament. In order to sufficiently heat the multifilament as the same goes around the guiding sleeves once and generate a sufficient tensile force on the multifilament, the multifilament is guided on the guiding sleeve that is driven for taking up the multifilament such that the multifilament and the guiding sleeve are in uninterrupted contact for a minimum length of 650 mm, the guiding sleeve being heated to a surface temperature ranging from 80 DEG C to 200 DEG C.

The invention relates to the technical field of food processing, and particularly relates to a quick-frozen braised noodle and a preparation method thereof. According to the quick-frozen braised noodle provided by the invention, wheat-core wheat flour, acetate modified starch and hydroxypropyl distarch phosphate are combined and used as a flour matrix, four components of isolated soy protein, sodium tripolyphosphate, sodium pyrophosphate and sodium polypyrophosphate are contained in a water retention agent; all components in the flour matrix synergistically acts; all the components in the water retention agent synergistically interacts; afterwards, by combining a three-time-awaking noodle preparation process, the water-absorption and water-retention performance of the quick-frozen braisednoodle is promoted; the color and luster stability is promoted; the quick-frozen braised noodle is prevented from generating brown stains in a quick-frozen reheating procedure; the eating quality of the quick-frozen braised noodle is improved. The braised noodle prepared by the preparation method is subpackaged and quick-frozen, is directly reheated by a microwave before being eaten, and is convenient for a consumer to eat and suitable for a busy office worker and the industrialized production of the braised noodle is promoted.

The present invention relates to a method for solving chemical milling deformation of domestic un-prestretched sheets, which includes the following steps: 1, applying oil to a sheet before quenching; 2, quenching the sheet according to thermal treatment regulations; 3, in the state of quenching, horizontally stretching the sheet to eliminate the internal stress of materials; and 4, finishing subsequent formation and chemical milling procedures according to the drawing. The method can eliminate the internal stress of process un-prestretched sheets, solve the problem of serious chemical milling deformation, reduce the labor intensity of workers and improve the making quality of large-sized enveloped parts.