233results about How to "Reduce thickness requirements" patented technology

The invention relates to a laser-MAG welding method for a steel plate of medium thickness and superhigh strength and aims at solving problems existing in steel plates of medium thickness and superhigh strength in the laser-MAG composite welding. The method comprises the following steps: 1, before welding, fixing a machining clamp to a position to be welded of a workpiece to be welded; 2, rigidly fixing a laser head and an MAG welding gun; 3, setting welding parameters; 4, adopting a robot integrated system for controlling the welding parameters, wherein firstly, an MAG electric arc is generated, after the electric arc is stabilized for 1-2 seconds, a laser device is controlled to emit laser, and finally a robot is controlled so that the laser working head and the MAG welding gun can move jointly to complete the welding process. The welding method is applied to the field of material processing engineering.

The present invention discloses a method for increasing light absorption of film solar cell. Firstly, depositing glass beards with diameter less than 1 mum on glass substrate to make the surface has fluctuation structure with propriety mum dimension. Then depositing transparent front electrode to make it has surface structure with evident light scattering effect. The film photovoltaic device formed on the transparent front electrode has higher light absorption capacity and conversion efficiency.

The invention relates to a track bed and a method and a device for lifting the same. The floating track bed is lifted by using a carrying beam which can be connected with a steel rail or floating plate through a locking clamp or hanging clamp as the support of the force of the working jack, thus the defect existing in the prior art that the floating track bed is lifted by using a lifting baffle block as the support of the force of the working jack is overcome. The device and the method have a lower requirement for the lifting space in and above a vibration isolating device and are more applicable. In addition, the device has simple structure, convenient operation, reliable performance and high work efficiency and can be widely used for lifting the built-in type floating structure, particularly the built-in type floating track bed and maintaining and replacing the vibration isolating device thereof in the later period.

The invention discloses a graded calendering molding method of a prelithiation anode. The graded calendering molding method comprises the steps that: a graded calendering lithium foil method is employed, the primary calendering of a lithium strip at pre-pressing rollers is completed, release films are introduced between main pressing rollers to assist in the secondary calendering of the lithium strip to form a lithium foil, and finally, on the release films attached at the fast roller sides of the main pressing rollers, the prelithiation anode is prepared through rolling of composite rollers and recombination of a negative pole piece under the transfer printing effect of the release films so that the large-scale production of the prelithiation anode is achieved, the production is low and the graded calendering molding method is safe and reliable.

The invention discloses an in-mould decorating injection moulding method, which is characterized by comprising the following steps: A, providing a thin film to cover the cavity of a female die; B, heating the thin film; C, sucking the air between the thin film and the female die so as to attach the thin film to the inner surface of the cavity; D, closing a male die and the female die to keep a die cavity between the male die and the thin film; and E, injecting an injection material into the die cavity and opening the mould after the injection material is shaped. The method can greatly simplify the in-mould decorating shaping process, complete the in-mould decorating process with a normal injection mould, save the pre-shaping and punching processes of the thin film and corresponding moulds, ensure easy development of the mould and reduce the investment in the mould and the equipment. The method is characterized by simplified production process, reduced rate of unqualified products, improved boundary appearance of parts, high production efficiency, low energy consumption and short process time. The method has low requirements on the thickness of the thin film; and the method of the invention can produce the in-mould decorating injection moulded part by using the thin films of 1 to 2mm so as to reduce the production cost.

The invention provides a chip packaging method and a chip packaging structure, wherein the chip packaging method comprises the steps of providing a first chip which comprises a first surface and a second surface that oppose each other, wherein the first surface of the first chip is provided with a plurality of first pads; providing a second chip with a third surface and a fourth surface that oppose each other, wherein the third surface of the second chip is provided with a plurality of second pads and the area of the second chip is larger than that of the first chip; providing a carrier plate; combining the fourth surface of the second chip with the surface of the carrier plate, wherein the plurality of second pads are arranged outside the combining area between the first chip and the second chip; forming a sealing material layer on the surface of the carrier plate, wherein the sealing material layer packages the first chip and the second chip; and forming a first conductive structure and a second conductive structure in the sealing material layer, wherein the first conductive structure is electrically connected with the first pads and the second conductive structure is electrically connected with the second pads. A package which is formed according to the chip packaging method has advantages of reduced structural dimension, improved stability and improved reliability.

A bonded metal fuselage for aerospace vehicles includes a monocoque structure having an outer metal skin, metal tear straps bonded to the outer skin and metal stringers bonded to the outer skin and to the tear straps. The outer chords of fuselage frames are fastened directly to tear straps and to the skin, obviating the need for clips to fasten the frames to the stringers.

The invention discloses a microwave beam focusing rotary scanning device, which comprises a horn antenna (1), a crescent lens (2), an offset focusing antenna (3) and a focus adjustment board (4) which are arranged coaxially, wherein the horn antenna (1) is arranged above the crescent lens (2); the bottom of the crescent lens (2) is contacted with the upper end face of the offset focusing antenna (3); and the focus adjustment board (4) is arranged below the offset focusing antenna (3). By adoption the structure, the whole microwave beam focusing rotary scanning device has a simple structure and a small volume, and is easy to implement; and according to the microwave beam focusing rotary scanning device, electromagnetic waves can be moved conveniently in a focus offsetting manner, a focusing manner and a focal point manner.

The invention relates to a nickel-free black tin cobalt alloy plating solution and an electroplating technology by using same. The parameters and contents of all components of the plating solution are as follows: the content of tin ions in a tin salt is 0.05-6g / L; the content of cobalt ions in a cobalt salt is 0.05-0.8g / L; the content of third metallic ions is 0.02-50g / L; the content of a complexing agent is 0.1-180g / L; the content of a blacking agent is 0.1-50g / L; the content of a PH buffer is 5-300g / L; the baume degree of the plating solution is 6-250; the temperature is 20-55 DEG C; and PH is 9-13. According to the technology provided by the invention, tin is taken as a main alloy layer and few cobalt and third and fourth metal ions are added in tin to form a ternary or quaternary alloy system; the cobalt content in the common black tin cobalt alloy plating solution excesses 8g / L, but the cobalt content is reduced to 0.05g / L according to the new electroplating technology provided by the invention; the special biodegradable or non-biodegradable stabilizing complexing agent and PH buffer are used, so that the production cost is lowered; and the nickel-free black tin cobalt alloy plating solution meets the limitation requirement on CO in the European Union Rosh standard, Germany LMBG standard, Mattel children toy standard, European Oeko-Tex Standard 100 standard and the like.

The invention relates to an L-beam piezoresistance type micro-accelerometer and a production method thereof, the micro-accelerometer comprises a supporting main framework body, an elastic beam, a weight block, cover plates and so on, which is characterized in that the elastic beam is shaped like L, a long arm of the L-shaped elastic beam is connected with a side frame of the supporting main framework body, the weight block is suspended in the middle of a supporting side frame body by the support of the L-shaped elastic beam, a short arm of the L-shaped elastic beam is connected with the top angle of the upper surface of the weight block; the upper and the lower surfaces of the supporting main framework body are bonded with the cover plates; the root part and the top end of the long arm of the L-shaped beam are respectively provided with a piezoresistor, and the two piezoresistors with the same resistance on the L-shaped beam constitute a bridge with the unilateral strain of a Wheatstone bridge. The micro-electron mechanical processing technology is adopted as the key production technology. The L-beam piezoresistance type micro-accelerometer can solve the problem that the existing piezoresistance type micro-accelerometer can not simultaneously meet the requirements of high sensitivity, small volume, low cost, small cross-interference and easy processing.

The invention discloses a making method ofa circuit board. The making method comprises steps of forming a conductive circuit on a copper foil in a physical way and transferring the conductive circuit to one side, on which insulation adhesive materials are arranged, of the base plate; and laminating the copper foil of the conductive circuit on the base plate on which the insulation materials are arranged, thereby forming a circuit board. In this way, the process for making the circuit board is simplified; cost is reduced; and thicker copper foils can be processed with the method.

The invention discloses a large-viewing-field and high-precision star sensor optical system, belongs to the field of optics, and aims to solve the problems of a conventional star sensor optical system. The system comprises a diaphragm, a lens group and an image plane, wherein light rays emitted by fixed stars in the viewing field go into the lens group through the diaphragm, and are imaged on the image plane after transmitted by the lens group; the lens group is a near image space telecentric optical system consisting of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially placed on the same optical axis in a direction from the diaphragm to the image plane; and the first lens, the fourth lens and the fifth lens are positive lenses, and the second lens, the third lens and the sixth lens are negative lenses.

The invention belongs to the technical field of heat exchangers, which relates to an enhanced heat transfer fin and a production process thereof. The enhanced heat transfer fin comprises a flat and straight substrate, wherein waveform fins which are raised on the flat and straight substrate and form certain angle with the flat and straight substrate are formed on the flat and straight substrate, reversing areas are arranged between a plurality of the waveform fins and divide the waveform fins into a plurality of groups waveform fin areas with different numbers of ripples, the wavelength and the wave amplitude of each waveform fin in each group are equal to each other, the number and the wavelength of the waveform fins of different groups are no equal to each other, and the number of the waveform fins in each group of the waveform fin area decreases in turn in the whole fin length while the wavelength increases in turn. The production process of the enhanced heat transfer fin is to put an aluminum strip on a roll forming machine to form the enhanced heat transfer fin provided with the waveform fins and the flat and straight substrate through one-step rolling. The enhanced heat transfer fin has good heat transfer property and small resistance, and is suitable to serve as a heat transfer fin of an automotive heat exchanger, a water tank radiator, a pressurizing intercooler and a wind cooling type hydraulic oil cooler.

The present invention relates to a method for preparing gasket seal. Said preparation method includes according to size requirement cutting metal ring; according to compression ratio of graphite plate and density of gasket cutting out width of graphite tape, according to the specification size required for gasket selecting proper mould; placing the graphite tape into the mould by turns and prepressing graphite ring; moulding the metal ring and graphite ring by means of mould and nesting metal ring with graphite ring together; demoulding; and edging and shaping so as to obtain the gasket seal.

The invention belongs to the technical field of wall decoration parts, and relates to an installing hanging assembly of veneer materials. The installing hanging assembly of the veneer materials comprises an L-shaped hanging part I which can be installed on a wall or a kneel or a supporting frame, a hanging part II which can be installed on the inner surface of a veneer and on a cross portion of the hanging part I, and a hanging part III connected with the upper end of the hanging part II and the hanging part I, wherein after the hanging part III is fixedly connected with the upper end of the hanging part II, the hanging part III is in elastic connection with a bending portion of the inner side of the hanging part I, and is in positioning connection with the cross portion of the hanging part I in a selective width mode, the outer side of the hanging part II extends downwards to form a bending portion, a pothook which can be hung on the veneer is arranged at the lower end of the bending portion of the hanging part II, a bending portion used for positioning or connecting the veneer is arranged at the outer end of the hanging part III, and an installation hole is formed in the upper side of the bending portion of the inner side of the hanging part I. The installing hanging assembly of the veneer materials has the advantages of being capable of installing thin veneer materials, high in firmness, simple and rapid in construction, capable of saving materials, low in production cost, flat in wall surface to be decorated, and suitable for being used as hanging parts for the veneer materials on indoor and outdoor walls.

The invention provides a metal-insulator-metal (MIM) capacitor and a method for forming the same. The method comprises steps of: providing a substrate, wherein a first conductive layer, a first insulated layer, and a second conductive layer are disposed on the substrate from top to bottom; etching the first conductive layer to form a first electrode which exposes a part of the first insulated layer; forming a second insulated layer covering the top surface and the sidewall of the first electrode and a part of the top surface of the first insulated layer; etching the second insulated layer and the first insulated layer until the second conductive layer is exposed, a sidewall structure is formed by the second insulated layer remaining at the surface of the sidewall of the first electrode and the first insulated layer under the second insulated layer, and a dielectric layer is formed by the first insulated layer under the first electrode; and etching the second conductive layer to form a second electrode. The method for forming the MIM capacitor may decrease etching damage to the dielectric layer in the MIM capacitor.

The invention provides a method for preparing a magnetic tunnel junction. The method is based on a sandwich structural unit which is composed of a first magnetic electrode, a non-magnetic layer and a second magnetic electrode. The mode that voltage is exerted at the two ends of the first magnetic electrode and the two ends of the second magnetic electrode is adopted. Therefore, magnetic atoms in the second magnetic electrode lose (or getting) electrons and then ions are formed. The ions enter the non-magnetic layer and move toward the first magnetic electrode, and an electric conductivity channel is formed. Through control over the exerted voltage, the distance from the electric conductivity channel to the first magnetic electrode is short enough and therefore, the magnetic tunnel junction is formed. Compared with the prior art, the preparation method is simple, low in cost and compatible with the micromachining technology, and therefore, the preparation method has good application prospects.

The invention discloses a multi-layer protective type diaper. The diaper comprises an antibacterial and deodorant fabric layer, a sweat-absorbent and moisture transfer fabric layer, a water-absorptiontype non-woven fabric layer and a surface layer from inside to ouTSide in sequence. The invention further discloses a method for making the multi-layer protective type diaper. The diaper has the advantages of being good in antibacterial effect, high in deodorant capacity and capable of absorbing moisture and releasing sweat.

The invention discloses a gallium nitride device structure having high heat dissipation performance and a preparation method thereof. The gallium nitride device structure comprises a gallium nitride chip, an etching stopping layer, and a diamond heat dissipation layer. The etching stopping layer is provided with a first surface, which is used as a growth interface, and the diamond heat dissipation layer is grown on the first surface of the etching stopping layer. The etching stopping layer is provided with a second surface, which is opposite to the first surface, and is used as a bonding interface, and the gallium nitride chip is disposed on the second surface of the etching stopping layer in a bonding way. The etching stopping layer is formed by adopting a high thermal conductivity material. The production method of the gallium nitride chip and diamond bonding structure adopts a low temperature technology, and a warping problem caused by thermal expansion mismatch under high temperature is prevented, and no damages on existing devices are caused, and therefore integration between the gallium nitride wafer or chip provided with the device and a thin diamond layer is realized, a self-supporting diamond thick film substrate is not required, enhancement of heat dissipation performance is guaranteed, and at the same time, costs are obviously reduced, and then problems of a gallium nitride heat dissipation scheme such as high costs and poor heat dissipation effect are solved.

The present invention relates to the manufacturing process of air chamber rubber diaphram used for vehicle brake unit, it includes: preparation of rubber sheet and canvas raw material; using air chamber diaphram mould to proceed first vulcanization on vulcanization machine, the vulcanization is proceeded under setting temperature and pressure, during vulcanization, it automatically blows-off three times; then proceed second vulcanization with same procedure, finally demould, cooling, polishing, inspecting is proceeded to obtain product. Advantages: increased product quality, reduced production cost etc..

An electric water heater with controllable constant pressure is composed of shell, internal container, electric heater, electric controller, water inlet, water discharging valve, water mixing valve, electromagentic valve between water inlet and internal container, and pressure relay in the internal container. When the pressure in internal container reaches a predefined value, the pressure relay is actuated to close the electromagnetic valve, so disconnecting the internal container to running water. When its pressure is lowered to a predefined value, the electromagnetic valve is opened and thewater is supplied to the internal container.

The invention discloses an electric tree test device for a silicone rubber material for cable accessories and a sample manufacturing method. The method includes the steps of adding semi-conductive silicone rubber into xylene, then spraying and curing the surface of a silicone rubber insulation sample, then cutting the silicone rubber insulation sample into a high-voltage electrode with a triangular longitudinal section end part, then adhering the high-voltage electrode to the surface of the silicone rubber insulation sample, and carrying out high-temperature vulcanization to obtain a piezoelectric electrode silicone rubber sample; putting the piezoelectric electrode silicon rubber sample wafer into a mold, injecting glue, and carrying out high-temperature vulcanization to obtain a sample;and cutting at a position 2 mm away from the tip of the high-voltage electrode, and adhering a ground electrode with a flat plate structure to the section. The tip of the high-voltage electrode does not have air gaps and cracks under large mechanical deformation by adopting the test sample provided by the invention. Moreover, an electrical tree in an actual cable accessory is generally developed from semiconduction to insulation, and the semiconductive material as a high-voltage electrode is more similar to the actual working condition of the cable accessory.

An antenna, comprising a primary radiation patch antenna, a first printed circuit board (PCB) substrate, a coaxial radio-frequency excitation port and a floor, wherein the primary radiation patch antenna is arranged at one side of the first PCB substrate, and is connected to the coaxial radio-frequency excitation port in the first PCB substrate; the coaxial radio-frequency excitation port is provided on the first PCB substrate, and one side of the first PCB substrate is provided with the primary radiation patch antenna, and the other side thereof is provided with the floor; and the primary radiation patch antenna is composed of one or more fractal structures. The antenna in the present invention can be applied to an RFID system of a small-scale terminal, and satisfies the reliability of the RFID system, thereby satisfying the potential demand of the current development and the future development of the RFID technology.

The invention discloses a stone facing prefabricated external wall plate as well as a production method and an external wall system thereof. The stone facing prefabricated external wall plate comprises a stone facing layer, a heat preservation material layer and a concrete structural layer which are arranged layer by layer through a connection piece, wherein the stone facing layer comprises a stone plate; a mounting slot is formed in the side end face of the stone plate; the connection piece comprises a connection plate and a hooking end; the connection plate is perpendicular to layering surfaces; the hooking end extends from the end part of the connection plate to the direction perpendicular to the connection plate; the hooking end is fixedly embedded into the mounting slot; the connection plate penetrates through the heat preservation material layer and is embedded to be anchored into the concrete structural layer. The mounting slot is formed in the side end face of the stone plate, so that the thickness of the stone facing layer can be reduced; therefore, the whole thickness and the weight of the external wall plate are reduced; the load contribution of the assembled external wall system to a building main body is small, heat isolation and drying heat preservation are facilitated, and the building energy consumption is reduced.

The invention discloses a casing pipe device structure used for oil drilling and capable of preventing casing damage due to fault slippage. The casing pipe device structure is installed in the expanding section of a fault and mainly composed of a movable joint of a four-layer structure. A rigidity followable casing pipe layer of the movable joint is connected with an upstream casing pipe part and a downstream casing pipe part through threaded connecting parts. The four-layer structure of the movable joint is connected into a whole at the two ends of the movable joint. An outer steel wire knitmesh is arranged on the outer side of the rigidity followable casing pipe layer, and an inner steel wire knitmesh and a flexible hose are sequentially and inwards arranged in the rigidity followable casing pipe layer. In the fault zone, displacement caused by fault slippage can be offset by a buffer space between the outer steel wire knitmesh of the movable joint and the stratum, the transverse displacement deformation and confining capacity of the rigidity followable casing pipe layer of the movable joint and a ring-pillar-shaped gap between the inner steel wire knitmesh and the flexible hose in the innermost layer. Meanwhile, mud or sandy soil can be effectively prevented from entering the flexible hose in the innermost layer through the outer steel wire knitmesh and the inner steel wire knitmesh, and the flexible hose can properly deform along with partial displacement deformation of the rigidity followable casing pipe layer, so that the flexible hose does not crack and influence oil recovery operation.

The invention relates to a nickel-free ferrous tin-cobalt alloy plating solution and a process for utilizing the plating solution for electroplating. The plating solution comprises the following compositions: 0.2 to 6 g / L of tin, 0.6 to 4 g / L of cobalt, 8 to 180 g / L of complexant, 2 to 20 g / L of melanizing agent and 50 to 320 g / L of pH buffer. The parameters of the plating solution are as follows: the Baume of the plating solution is between 10 and 25 baume degrees; the temperature is between 28 and 48 DEG C; and the pH is between 10 and 13. The coating of the nickel-free ferrous tin-cobalt alloy plating solution is an alloy layer taking the tin as a main material, and a small amount of cobalt is added into the coating to form a binary alloy system; the cobalt content in a general ferrous tin-cobalt alloy plating solution exceeds 8 g / L, but the novel electroplating process can reduce the cobalt content to 0.8 g / L; and due to adoption of the special biodegradable stable complexant and the special biodegradable pH buffer, the production cost can be reduced, novel EU standards can be reached simultaneously, and various problems of the prior ferrous tin-cobalt alloy plating solution and the prior process can be solved.

The invention provides a tensile beam comprising a beam body and at least one stay cable arranged on the beam body, wherein the stay cable is arranged on the tensioned surface of the beam body along the axial direction of the beam body and is provided with a pre-tightening force. The invention also provides an arm support and a pump truck comprising the arm support, wherein the arm support comprises at least one arm segment manufactured by adopting the tensile beam. Through the technical scheme of the invention, the tension born by the beam body can be increased; on the premise that the length and the loading capacity of the arm support can be guaranteed, the thickness of plates of the arm support can be decreased; therefore, the flexibility of motions of the arm support is improved, the manufacturing material is decreased, and the manufacturing difficulty is reduced.