347results about How to "Reduce flatness requirements" patented technology

The invention discloses a non-cured rubber asphalt waterproof paint. The preparation technology of the paint comprises the following steps: heating the asphalt to 140 DEG C, loading the heated asphalt into a stirring tank, adding a softening agent, rubber powder, and polymer, stirring for 30 minutes, heating to 160 DEG C, delivering the mixture to a colloid mill to grind the two edges, heating to 190 DEG C, adding a special additive, stirring for one hour, cooling to 160 to 170 DEG C, adding an auxiliary agent, stirring for one hour, adding a filling material, stirring for one hour, and finally discharging. The paint solves the problems of waterproof layer fracture due to the cracking stress, which is transferred from the basic layer to the waterproof layer, and the accelerated aging due to the flexural fatigue and high stress state of the waterproof layer. Moreover, because of the cohesiveness of the paint, the capillary pores and cracks in the basic layer can be perfectly sealed by the paint, thus the problem of water leaking in the waterproof layer is solved, and the waterproof reliability is greatly improved.

The invention discloses a preparation method of a graphene composite anticorrosive coating. The preparation method comprises the following steps: (1) preparing an organic coating solution with a plurality of hydroxyls or amino groups; (2) preparing an oxidized graphene or modified graphene solution; (3) performing metal surface pretreatment; (4) performing electrodeposition to form an organic coating film; and (5) preparing the graphene composite anticorrosive coating. The method is simple and feasible in technology, the film forming speed is obviously improved, and the prepared coating is more compact and uniform; compared with a plain sample, the low-frequency impedance modulus value of the prepared composite coating is improved to 10<6.2> from 10<3.5> by performing electrochemical testing in 3.5wt% NaCl neutral electrolyte solution, the self-corrosion current is also remarkably reduced, and longer effective prevention effect on a matrix can be achieved. Compared with the conventional dip-coating method, the preparation method has lower requirement on the flatness of a metal surface, and controllable preparation can be effectively realized; the prepared coating is non-toxic and environment-friendly, controllable in thickness, and more compact and uniform, and more durable and stable protection effect on the metal matrix can be achieved.

The invention relates to a method for processing a rigid-flexible printed circuit board (PCB). The method comprises the following steps: 1. pretreatment before compression: pre-cutting the compression surface of a PCB and removing the wastes of bonding sheets, wherein the pre-cutting treatment is to cut a crevice around a waste region of the PCB with laser, wherein the PCB is not cut off; 2. compression: compressing the PCB, the bonding sheets and a flexible printed circuit (FPC) board into a whole; 3. treatment after compression and before contour processing: drilling, depositing and platingcopper, making circuit and carrying out solder resist; and 4. contour processing: using a milling cutter to mill a groove around the waste region of the PCB, controlling the depth of the milling cutter to communicate the milled groove with the crevice and then removing the wastes of the PCB. The method is convenient for the removal of the wastes of the rigid PCB, and has the beneficial effects ofpreventing the milling cutter from directly milling the flexible PCB, greatly reducing the control requirement for milling cutter depth, reducing the requirement for PCB flatness, improving the processing quality of the product and saving the production cost.

The invention relates to a skid type AGV (automatic guided vehicle). The skid type AGV comprises a main frame, double-belt wheel drive devices, a ground wheel drive device, direct-current servo motors, a storage battery, a PGV color recognition sensor and an obstacle recognition sensor, wherein the double-belt wheel drive devices are symmetrically arranged on the middle position of the main frame bilaterally; the two direct-current servo motors which are connected in the main frame are in transmission connection with the two double-belt wheel drive devices respectively; the ground wheel drive device comprises a left front wheel, a right front wheel, a left rear wheel and a right rear wheel, the left front wheel and the left rear wheel are in same-direction synchronous rotation, and the right front wheel and the right rear wheel are in synchronous same-direction rotation; a transmission structure of the AGV is realized by utilizing double synchronous belt wheels and a reduction supporting structure, so that the AGV has the mechanical type self-adaptive four-wheel-drive capacity. Furthermore, the color recognition sensor is applied to substitute a conventional magnetic navigation and RFID (radio frequency identification device) location mode with a color navigation and two-dimension code location mode, so that the navigation precision is improved, and the product cost and the using cost of the product are reduced.

The invention discloses an automatic cover pressing machine of plastic covers. The automatic cover pressing machine of the plastic covers is characterized by comprising a pressing mechanism used for tightly pressing the plastic covers on cans and a conveying mechanism used for conveying the plastic covers to the entry of the pressing mechanism. The pressing mechanism can automatically adjust the degree of tightness of cover pressing through a tightness self-adjusting spring mechanism according to the bending and the deformation of the plastic covers, the phenomenon of pressure leakage is effectively avoided, and continuous production can be carried out on the cans with various heights. The conveying mechanism places the plastic covers in a sliding channel one by one through a vacuum suction cup to carry out automatic gravity conveying, the whole conveying mechanism can work continuously and stably, the requirements for the flatness of the plastic covers is not high, and the situation that conveying is stopped due to slight distortion of the plastic covers is avoided.

A method for forming a metal wiring line, comprises: (a) forming a bank including a first opening corresponding to a first film pattern and a second opening corresponding to a second film pattern that is coupled to the first film pattern and has a width narrower than a width of the first film pattern; (b) disposing a droplet of a functional liquid in the first opening so as to dispose the functional liquid in the second opening by an autonomous flow of the functional liquid; (c) hardening the functional liquid disposed in the first opening and the second opening; and (d) forming the first film pattern and the second film pattern by alternately repeating step (b) and step (c) at least one time.

The invention provides double-sided composite card paper and a preparation method thereof. A lining pulp layer is covered on one side of a core pulp layer, a bottom pulp layer is covered on the other side of the core pulp layer and a surface pulp layer is covered on the lining pulp layer; or lining pulp layers are covered on two sides of a core pulp layer, a surface pulp layer is covered on the lining pulp layer on one side, and a bottom pulp layer is covered on the lining pulp layer on the other side. Common waste paper pulp (office waste paper, common waste paper boards and the like) is used for replacing wood pulp to serve as core pulp, and waste paper de-inking pulp and waste white paper edge pulp are used for replacing wood pulp to serve as lining pulp so as to save the cost; each layer is specifically quantified; and the obtained double-sided composite card paper has heavy handfeel and crisp paper surface, press molding and embossing processes required for processing and molding have better implementing effects, the expressed levels are richer, the dependency of the product on operating workers is furthest reduced, and effective expansion of the capacity and increment of the economic benefit are furthest realized.

The invention discloses a wing folding mechanism suitable for folding a wing at any angle, relates to a wing folding mechanism, and aims to solve the problems that a rigid folding wing cannot meet the high requirements on low speed performance of an aircraft and flatness of the wing of the aircraft, an inflatable folding wing has low strength and rigidity and is easily instable under bending moment, and materials are easy to age at present. In a space rectangular coordinate system taking a direction which is along the axis of an aircraft body and points to front of the aircraft as an x axis positive direction and a direction which is along a connecting line of wing tips of two wings and points to the left side of the aircraft as a y axis positive direction, the direction vector of a rotating shaft and the rotation angle of a wing installation frame around the axis of the rotating shaft are shown in the specifications. The wing folding mechanism is used for an unmanned aerial vehicle.

A metal composite substrate includes a core made of a metal having higher strength than aluminum at elevated temperatures of at least 300° C. and an aluminum or aluminum alloy layer covering an entire surface of the core, and an anodized film is formed at a surface of the aluminum or aluminum alloy layer. The metal composite substrate having the anodized surface film can produce with high efficiency an insulating flexible support by a roll-to-roll process and has good flatness during the high-temperature heat treatment.

The invention discloses a method for reinforcing a concrete structure with embedded wet-bonded FRP strips and components thereof, comprising the following steps: (1) opening at least one groove on the surface of the concrete structure to be reinforced; (2) removing concrete impurities in the groove (3) pouring adhesive in the groove; (4) using adhesive to brush and fully infiltrate the FRP strip; (5) embedding the FRP strip to the groove; (6 ) After the FRP strip is fully embedded in the groove, remove excess adhesive on the groove; (7) Naturally maintain the concrete structure. The component is formed by bending or shearing the existing concrete structure with embedded wet-bonded FRP strips, including the existing concrete structure and at least one wet-bonded FRP strip. The invention uses embedded wet-bonded FRP strips to strengthen the concrete structure under bending or shearing. The wet-bonded FRP strips can adapt to the direction change requirements of FRP materials according to different reinforcement requirements, thereby limiting or slowing down the occurrence of peeling damage and improving the performance of FRP materials. The utilization rate and reinforcement effect.

The invention relates to a clamp type sheet automatic-feeding device of a hydraulic machine, which is characterized by comprising a mechanism supporting frame, a brake motor, a reducer and a clamp mechanism. The inner part of the mechanism supporting frame is fixedly provided with a linear guide rail which is provided with a base, and the base is provided with the brake motor, the reducer connected with the brake motor and the clamp mechanism. The inner part of the mechanism supporting frame is also fixedly provided with a rack which is engaged with a gear installed on one side of the reducer, and two end parts of the mechanism supporting frame are provided with limitation stops. The clamp type sheet automatic-feeding device has the advantages that a sheet to be machined is accurately sent to a preset position and is quickly positioned, so that the production efficiency is enhanced; the occupied space is small, the inner space of the hydraulic machine is saved, and the manufacturing cost of equipment is reduced; an automatic up and down system is convenient to realize automation, and the operation and the maintenance are easy; the sheet sending specification is expanded, the flatness demand to the sheet is reduced, and the production cost is reduced; the sheet run is smooth, and the noise is reduced; and the working environment is improved.

The present invention discloses a projection screen based touch positioning method. The method comprises the following steps: starting a camera on a depth sensor to obtain image information of a touch object on a front side of a projection plane projected by a projection device, and starting the depth sensor to obtain depth information of the touch object; obtaining three-dimensional touch point coordinates of the touch object based on the image information and depth information of the touch object; and when it is determined that the three-dimensional touch point coordinates of the touch object locate in an effective touch space on the front side of the projection plane, responding to a corresponding operation according to the three-dimensional touch point coordinates of the touch object. The present invention further discloses a projection screen based touch positioning system. According to the method and system disclosed by the embodiments of the present invention, on the premise of ensuring touch precision, a touch on a flat surface can be implemented, and requirements of a flatness level of the target wall are relatively low, so that a touch operation on any touch object can be implemented.

The invention discloses a die taking and die bonding device. A die bonding table moves along an X direction and a Y direction, a planar jig seat is embedded onto the die bonding table and is flush with the die bonding table, a heating device is connected with the planar jig seat, a rotation arm is provided with a welding head, the welding head is used for die taking and die bonding, a substrate is arranged above the die bonding table and does feeding motion relative to the die bonding table along the X direction, a first driving device is used for driving the rotation arm to do circumferential rotation, a wafer table is used for fixing a wafer, and a wafer table driving device is used for driving the wafer table to move along the X direction and the Y direction and driving the wafer table to rotate around a rotation shaft. The die taking and die bonding device has the beneficial effects that the planar jig seat is arranged, the substrate is heated within a certain range, the temperature is stably controlled, and a hole phenomenon is difficult to generate during chip assembly; and during die bonding, a force between the welding head and the substrate is concentrated on the planar jig seat, the requirement on integral smoothness of the die bonding table is greatly reduced, the parallelism of the welding head and the substrate arranged at a chip assembly position is improved, and the surface-mount smoothness of a semiconductor device is ensured.

The invention relates to a dishwasher spray arm connection structure and a dishwasher. The dishwasher spray arm connection structure comprises a spray arm and a base fixed to a liner; the spray arm has a through-hole to run up and down, and includes a connecting base for connecting the spray arm and the base; the connecting base comprises a top cover arranged from top to bottom, a transfer part and a fixed part, and the top cover is covered over the top of the through-hole; the fixed part is disassembled and connected by passing through the through-hole with the base below; the transfer part is inserted into the through-hole, and the spray arm rotates around the transfer part; and the connecting base has a path to connect the water channel and the spray arm. The dishwasher not only makes the disassembly and installation of the spray arm very convenient and is convenient for after-sales maintenance, but also simplifies the structure and makes the rotation of the spray arm smoother.

The invention relates to a method for producing low-temperature circle sheet micro gas box, which is characterized in that: the benzocyclobutene is used to process material linkage with humid etching or dry etching technique of semi-conductor in 250Deg. C, to realize the circle sheet air-tightness sealing linkage of chip-level gas box. The invention comprises a atom gas box containing a chip-level atom clock gas box, a high-precision magnetic field sensor gas box, a atom feedback glimmer frequency stabilizer; a atom gas box containing a atom light filter, with glimmer Fabry-Perot chamber. The linked BCB glue is in 0.2ª–m thickness, the air-tightness of sealed He gas can reach 2.1-5.9X10-4Pa cm3 / s, and the linkage strength is higher than 4.65MPa, while the thermal cycle reliability can fully reach the packing standard of micro electric device.

The invention discloses a microstep robot. The microstep robot comprises a shell, a forward motor, a walking mechanism and a steering mechanism. The walking mechanism comprises a gear transmission mechanism, a Chebyshev connecting rod mechanism and feet. The gear transmission mechanism comprises a front driving gear, a middle gear and a rear driving gear which are sequentially meshed in a front-back mode. The forward motor is connected with the middle gear through a coupler. The front and rear driving gears are each provided with a gear shaft. The Chebyshev connecting rod mechanism is driven by the gear shafts. The steering mechanism comprises a driving gear, a steering gear, a thrust ball bearing, a base and a steering engine. The driving gear and the steering gear are arranged horizontally and meshed with each other. The steering engine is connected with the gear shafts of the driving gears. The thrust ball bearing is connected to the lower portion of a gear shaft of the steering gear and located inside a bearing pedestal below a shell. The gear shaft of the steering gear is connected with the base through a cotter pin. The microstep robot does not have the high requirement for ground flatness, can step over a lower barrier and has the steering characteristic.

The invention relates to an anti-cracking color retention VOC-free (Volatile Organic Compounds) zero-alkali-return aqueous dry powder building colored coating which comprises the following substances in percentage by weight: 20-40% of low-alkali cementing agent, 50-60% of colored sand, 4-9% of sepiolite powder, 0.01-0.015% of plasticizing agent, 0.05% of high-strength adhesive, 3-9% of redispersible latex powder, 0.01% of water repellent, 0-0.1% of antalkaline, 0.01-0.02% of powdered dispersing agent, 0-0.02% of powdered defoaming agent and 0.8-2% of inorganic pigment. The anti-cracking color retention VOC-free zero-alkali-return aqueous dry powder building colored coating is compounded by utilizing the compatibility principle of various powder raw materials and a scientific formula. The anti-cracking color retention VOC-free zero-alkali-return aqueous dry powder building colored coating has the advantages of strong base wall adhesive force, strong weather resistance, zero alkali return and bright color, no cracks or light pollution is generated, and the service life of the coating is as long as that of a building. The anti-cracking color retention VOC-free zero-alkali-return aqueous dry powder building colored coating is mainly applied to the decorative finish of civil building alternative brick surfaces and the latex coating decorative finish and belongs to a novel environment-friendly and energy-saving material.

The invention relates to a multi-functional bending device. The multi-functional bending device comprises a bender cutting board and a bender lower die, wherein a workpiece is placed between the bender cutting board and the bender lower die. The multi-functional bending device further comprises a bending baffle mechanism and an angle measurement instrument, wherein the bending baffle mechanism comprises a baffle beam, two stop dogs and a bending baffle; the bending baffle is separately connected with the two stop dogs, is arranged on one side of the bender lower die and is close to the workpiece; the two stop dogs are separately connected with the baffle beam; and the angle measurement instrument is arranged on the bending baffle. According to the angular value of the angle measurement instrument, the value of an angle between the edge of the bending baffle and the lower die bending line of the bender lower die is regulated, the bending baffle is fixed, the workpiece is close to the bending baffle, and the bender cutting board carries out bending action. Compared with the prior art, the multi-functional bending device has the advantages of being high in universality, high in product precision, simple to operate and the like.

The present invention discloses one kind of adhesive for composite waterproof rolled sheet product and its production process. The adhesive consists of water-thinned latex or water soluble glue powder, water reducing agent, cellulose and additive. It has high adhesion effect, wide use range, high strength, waterproof function, and may be used in the construction of modified waterproof asphalt rolled sheet and polymer sheet with fabric on the surface of new and old concrete and in the repair and waterproof sealing of concrete.

The invention discloses an integrated assembly type pipe gallery based on a composite bottom plate and a construction method thereof. Each unit plate block in the composite bottom plate of the integrated assembly type pipe gallery comprises a laminated portion and a cast-in-place portion which is located on the periphery of the laminated portion, wherein each laminated portion comprises a prefabricated bottom plate which is fixedly connected with a foundation cushion layer, a bottom plate truss and a bottom plate cast-in-place layer, and the peripheral edges of each bottom plate truss horizontally outwards extends to form a steel bar framework of the corresponding cast-in-place portion; a double-layer laminated wallboard comprises an outer prefabricated plate which is located on a water attaining face, an inner prefabricated plate which is located on a water opposite face and a cast-in-place sandwich layer which is located between the outer prefabricated plate and the inner prefabricated plate, the outer prefabricated plates and the inner prefabricated plates are connected through wall truss steel bars, and the bottoms of the wall truss steel bars are connected with the margins ofside edges of the steel bar frameworks of the cast-in-place portions of the composite bottom plate; and the lower end surface of the outer prefabricated plate is tightly attached to the upper surfaceof the foundation cushion layer, and a top plate cast-in-place layer of a laminated top plate and the cast-in-place sandwich layer of the double-layer laminated wallboard are integrally casted. According to the integrated assembly type pipe gallery and the construction method, the construction is convenient, fast and efficient, the construction cost is low, the waterproof effect is good, and the overall performance of the pipe gallery is high.

The invention discloses a laser device of a long-focal depth and small-focal spot lens focusing system. The laser device includes a laser source, laser, a first surface, a first optical element, a second surface, a third surface, a second optical element, a fourth surface, an image point imaged by the first optical element, an image point imaged by a lens group, and an optical screen; the laser source emits the laser; the lens group includes the first optical element and the second optical element arranged on the optical path of the laser; the first optical element includes the first surface and the second surface; and the second optical element includes the third surface and the fourth surface. The laser device of the invention has the advantages of simple structure, low manufacturing cost and small size, and can satisfy requirements for miniaturization; and the materials and positions of the optical elements in the laser device are properly set, and related parameters of the laser source are properly selected, and therefore, the system device can further have the advantages of long focal depth, small focal spot and low requirements for workpiece flatness.

A keel frame used for laying ground brick is prepared as forming frame structure by longitudinal keel and horizontal keel, forming longitudinal keel by master keel and sub keel checked on master keel as well as a numbers of foot components firm-joint on bottom of master keel, applying structural section with notch upwards as master keel and forming foot component by base and horizontal regulation mechanism. It can be used to raise quality and speed of ground brick-laying effectively.

The invention provides composite heat insulation dimming glass and relates to the technical field of optoelectronic products. The composite heat insulation dimming glass comprises a first thin film substrate, a second thin film substrate, a first glass substrate and a second glass substrate, wherein the first thin film substrate and the second thin film substrate are arranged between the first glass substrate and the second glass substrate; a first transparent conducting layer is sputtered on the first thin film substrate, and a second transparent conducting layer is sputtered on the second thin film substrate; a PDLC (polymer dispersed liquid crystal) layer coats the first transparent conducting layer / the second transparent conducting layer; a first transparent adhesive layer coats the first thin film substrate / the first glass substrate, the first thin film substrate and the first glass substrate are fitted together by virtue of the first transparent adhesive layer, a second transparent adhesive layer coats the second thin film substrate / the second glass substrate, and the second thin film substrate and the second glass substrate are fitted together by virtue of the second transparent adhesive layer; and an ultraviolet absorber and an infrared blocking agent are added in the first transparent adhesive layer, and the infrared blocking agent is added in the second transparent adhesive layer.

The invention belongs to the technical field of medical instruments, and in particular relates to a safe, convenient, comfortable, attractive and adjustable powerless walking aid with a four-leg frame. The walking aid is simple in structure, attractive in appearance and convenient to operate, and is provided with two rear wheels with special structures; the structures of the rear wheels can brake at any time, a hand brake is not required, so that unnecessary troubles and dangers are avoided; requirements on ground evenness are low; the walking aid is wide in application range and good in safety and stability; front wheels of the walking aid are two universal wheels, so that the walking aid walks flexibly and conveniently; the walking aid has a seat function, and an old person using the walking aid has a rest conveniently; a seat structure is in the form of a Chinese scroll picture, and is interesting and full of humanism; armrests are obliquely transitional arc sections according to an ergonomics principle, and is well grasped, and the walking aid can be pushed in a labor-saving manner owing to the armrests; and the height of the walking aid can be adjusted, so that demands of a large number of users can be met.

The invention provides a ground-adaptive differential-drive floating wheel system which comprises a front wheel set and a rear wheel set. The front wheel set comprises a front fork-shaped support, a horizontal floating rod is connected in the front fork-shaped frame through a pivot shaft, and universal wheels are respectively mounted under two ends of the horizontal floating rod; the rear wheel set is formed by two sets of longitudinal floating wheels perpendicular to the horizontal floating rod, each longitudinal floating wheel comprises a rear fork-shaped support and longitudinal floating rods arranged in the rear fork-shaped support, driving wheels are mounted at front ends of the longitudinal floating rods, universal wheels are mounted at rear ends of the longitudinal floating rods, inner sides of the longitudinal floating wheels are opposite, and the longitudinal floating wheels are connected in a manner that a horizontal shaft penetrates the rear fork-shaped supports and the longitudinal floating rods, the inner side of each longitudinal floating rod is provided with a drive motor, and the drive motors are connected with the driving wheels in a driving manner. The ground-adaptive differential-drive floating wheel system has the advantages of being simple and easy to use, convenient in disassembly and the like; the ground-adaptive differential-drive floating wheel system is simple in structure, low in cost, applicable to automatic guided vehicles of various operation conditions, not high in requirement of flatness of the ground and the like.