177results about How to "Guaranteed not to fall off" patented technology

The invention provides an electroplating or chemical-plating pretreatment method of aluminum alloy and a copper plating method of aluminum alloy. The pretreatment method which comprises the steps of chemical sand treatment, surface dust removal, primary zinc immersion, secondary zinc immersion and nickel preplating is adopted, a proper solution formula and proper technological parameters are selected, the binding force of a plating layer obtained later is increased, and it is ensured that the plating layer of copper or other metal is qualified after 280 DEG C welding. The pretreatment method is stable and suitable for cyaniding copper plating treatment of aluminum alloy materials and other kinds of electroplating and chemical-plating pretreatment of the aluminum alloy materials. A thermal shock experiment result shows that aluminum alloy parts can bear high temperature of 280 DEG C for 3 min without bubbling or peeling or falling off after being plated with copper through the method, and the pretreatment method can be applied to electroplating and chemical-plating processes of a large number of parts.

The invention provides a fuse mounting structure. The fuse mounting structure comprises an electric appliance box main body and a fuse holder, wherein slots are formed in the two sides of the electric appliance box main body; first bosses and second bosses are arranged inside the slots; the fuse holder comprises a fuse mounting part, clamping parts positioned on the two sides of the fuse mounting part, and two insertion parts positioned below the fuse mounting part; the insertion parts comprise sliding chutes with sealed upper ends and lower ends, and bulges protruded in the directions far away from the sliding chutes; the insertion parts of the fuse holder are inserted in the slots of the electric appliance box main body; the second bosses are positioned in the sliding chute; under the working condition, the first bosses are buckled with the bulges, and meanwhile the second bulges are not in contact with the lower ends of the sliding chutes; under the out-of-service condition, the first bosses squeeze the bulges to enable the insertion parts to be deformed towards the sliding chutes, and meanwhile the second bosses are in contact with the lower ends of the sliding chutes. The fuse mounting structure disclosed by the invention is convenient to operate and high in safety.

The invention relates to high-temperature sealing gum, which includes, by weight, 50-80 parts of glass powder, 5-40 parts of Ag/Cu alloy powder and 10-20 parts of a dispersant. The glass powder is prepared by crushing SiO2 glass and/or boron oxide glass. By adding the Ag/Cu alloy powder and the dispersant to the glass powder, the high-temperature sealing gum can seal or connect metal materials, ceramic materials or both, has excellent chemical stability and thermal stability, can effectively seal the material from room temperature to 1000 DEG C; meanwhile, after the high-temperature sealing gum is cured, thermal-expansion coefficient can be adjusted according to the content of oxides in the glass powder, ratio of silver in the Ag/Cu alloy powder and addition amount of the Ag/Cu alloy powder and can be changed optionally in the range of 7.3*10<-6> - 16.1*10<-6>/K, thus satisfying sealing demand on materials in different thermal-expansion coefficients.

The invention discloses a manufacturing method of an invisible correcting device and based on numerical control machining. The manufacturing method includes: constructing original three-dimensional tooth jaw data; building tooth jaw three-dimensional models at 5-80 stages in total in the correcting process; using epoxy resin as a raw material; utilizing a numerical control machining method to machine the tooth jaw three-dimensional models to be solid tooth jaw models respectively; utilizing the solid tooth jaw models to press to form the invisible correcting device, shearing, polishing and then delivering the invisible correcting device to a patient to use. Through the method, the invisible correcting device manufactured reaches 0.005mm in accuracy, so that correcting effect is improved; light-cured resin which is expensive is not needed, and the raw material is recyclable, so that production cost is saved and the manufacturing method has a wide application prospect.

The invention discloses a method of preventing a via hole from oil dropping in the lead-free HASL (Hot Air Solder Leveling) process of a circuit board, which comprises the steps of etching, microetching and brownification, volcanic ash scrubbing, green oil jacking, solder resisting and lead-free HASL. According to the method, a microetching and brownification procedure is added after the etching, and a hole wall is subjected to micro coarsening to increase the adhesion of jacking green oil to the hole wall, thereby achieving the purpose of preventing the subsequent lead-free HASL technology from resulting in the oil dropping of the via hole due to high temperature. Compared with the prior art, the method solves the problem of oil dropping of the via hole in the green oil jacking in the lead-free HASL technology, the technology is simple, and the product quality is improved effectively.

The invention discloses a rosin modified composite resin, which comprises the following raw materials in part by weight: 60 to 80 parts of rosin, 3 to 10 parts of conjugated polyprotic acid, conjugated polyanhydride or mixture of conjugated polyprotic acid and conjugated polyanhydride, 8 to 18 parts of polyol, 0.3 to 2 parts of pre-antioxidant, and 5 to 25 parts of vegetable oil, fatty acid or mixture of vegetable oil and fatty acid. The preparation method disclosed by the invention is to prepare rosin modified composite resin with high toughness, excellent film forming leveling property, high weather resistance and less pollution by subjecting raw materials to addition, esterification, ester exchange and other special modification reactions to increase the weather resistance and oxidation resistance of a resin structure. The preparation method can reduce production cost and environment pollution, and solve the problems of medium brittleness, poor leveling property, low weather resistance, and the like.

The invention discloses a split type structure of an automobile backseat backrest framework. According to the split type structure of the automobile backseat backrest framework, the obverse side of a right reinforcing plate of a backseat partition board is detachably connected with the lower right corner of the backseat backrest framework; the obverse side of a left reinforcing plate of the backseat partition board is detachably connected with the lower left corner of the backseat backrest framework; a rear floor of an automobile body is detachably connected with the middle section of the bottom of the backseat backrest framework; the lower portion of the reverse side of the right reinforcing plate of the backseat partition board is detachably connected with a right connecting plate of a rear wheel cover of the rear floor; the lower portion of the reverse side of the left reinforcing plate of the backseat partition board is detachably connected with a left connecting plate of the rear wheel cover of the rear floor; cross bars are arranged on the upper portion of the backseat backrest framework; the upper portion of the backseat backrest framework is connected with grooves in backrest hook supports through the cross bars; the upper portion of the reverse side of the right reinforcing plate of the backseat partition board is detachably connected with a right extension plate of a cross beam of a rear shelf; the upper portion of the reverse side of the left reinforcing plate of the backseat partition board is detachably connected with a left extension plate of the cross beam of the rear shelf. The split type structure expands the application range of the backseat partition board to various automobile types.

The invention discloses a concrete construction method for a big-gradient sloping roof. At first, a bottom layer formwork module 2 of the big-gradient sloping roof is installed according to needs, roof panel steel bars are bound according to construction drawings and standard requirements, then sprayed concrete construction is carried out on the big-gradient sloping roof panel 1, the big-gradient sloping roof panel 1 comprises the sloping roof formwork module 2 and pre-buried L-shaped pulling ribs 3, the formwork module 2 is machined in advance to be formed and to be hoisted to a full space bearing frame 4, concrete is continuously sprayed and constructed at one time, construction quality of the concrete can be visually observed, and it is guaranteed that the interior of the concrete is dense; after roof concrete is renovated by means of cement mortar with the same proportion of the roof concrete through cleaning of dross on the surface layer, the concrete is square in appearance size, the exterior of the concrete is flat, and the interior of the concrete is solid.

The present invention relates to roller cutter bit and features an early warning device set on the toothed claw shaft neck for prevent pineapple from falling off. The device consists of circumferential rollaway nest, roller inside the nest and locking wedge. After the bearing pair is abrased to preset dangerous limit, the pineapple is clamped in the shaft neck, the working torque and speed of the roller cutter bit will change abruptly, so that the bit to be failed may be replaced timely. The present invention can prevent pineapple from falling off and lower well drilling cost, and the locking wedge in the device has great bearing capacity so that the present invention can meet the requirement of different work conditions, especially great drilling pressure.

The invention discloses a device and method for purifying poisonous and harmful organic pollutants by using an electromagnetic collaborative enhanced biological packed tower, and belongs to the field of pollution control of difficultly treated high-concentration poisonous and harmful organic pollutants. The method for treating the poisonous and harmful organic pollutants, which is disclosed by the invention comprises the steps: domestication of a bactericide; preparation of reactor packing; biofilm formation of reactor packing; and treatment of poisonous and harmful organic pollutants. According to the method disclosed by the invention, the defect that the degradation efficiency is affected by concentrated falling easily caused by aging when the biofilm process runs are overcome by utilizing an electromagnetic collaborative technology; the bactericide with a rapid growth rate and high degradation efficiency of poisonous and harmful organic pollutants is cultured; meanwhile, the content of dissolved oxygen in a reactor system is improved, so that the mass transfer rate of matter in gas and liquid phases is enhanced, and thus the degradation reaction probability of the poisonous and harmful organic pollutants is increased, and the organic matter is fully purified.

The invention aims to provide a flexible cable driving unit. The driving unit comprises a driving unit bracket, a revolving flexible cable guide device, a permanent magnet direct current moment motor, a fixed flexible cable guide device, a flexible cable traction wheel and a guide shaft, wherein the permanent magnet direct current moment motor is arranged outside the driving unit bracket; the flexible cable traction wheel is arranged in the driving unit bracket; an output shaft of the permanent magnet direct current moment motor is connected with the flexible cable traction wheel; the revolving flexible cable guide device is connected with the fixed flexible cable guide device through the guide shaft; the fixed flexible cable guide device is fixed in the driving unit bracket; the revolving flexible cable guide device and the guide shaft are arranged outside the driving unit bracket; and a flexible cable is wound on the flexible cable traction wheel and passes through the fixed flexible cable guide device, the guide shaft and the revolving flexible cable guide device. The flexible cable driving unit can drive the flexible cable in a spatial multi-degree-of-freedom mode, is modular,has a compact integral structure and light weight, and is convenient to transport, assemble and disassemble spatially.

The invention provides a power distribution cabinet assembling platform. The power distribution cabinet assembling platform includes an electric control cabinet, a base, lifting mechanisms, a turning mechanism, an operation platform and vertical arm mechanisms; supporting upright columns are connected onto the base; slide grooves are arranged on the supporting upright columns; the lifting mechanisms are vertically arranged at four corners of the base; the turning mechanism comprises a turning bracket, a rotating shaft, a connecting piece and a turning hydraulic jack, wherein the turning bracket is correspondingly clamped in the slide grooves in a sliding manner and is connected at the upper parts of the lifting mechanisms in a jacking manner, the rotating shaft is parallelly fixed at the lower part of the turning bracket and is clamped into the slide grooves in a sliding manner, and the turning hydraulic jack is connected at the middle of the turning bracket in a jacking manner through the connecting piece; the operation platform is fixed at the upper surface of the turning bracket; and the vertical arm mechanisms are arranged at two sides of the middle of the operation platform. With the power distribution cabinet assembling platform adopted, the positions of the side plates of a power distribution cabinet to be assembled can be determined, and complex steps for repeatedly adjusting a cabinet body to straighten the cabinet body in an assembling process can be omitted, and after the power distribution cabinet is assembled, the cabinet body of the power distribution cabinet can be automatically turned so as to be straightened, and manual lift can be omitted.

A UHF RFID label is disclosed and comprises a label chip, a radio frequency circuit and base material, wherein the radio frequency circuit is imbedded on the base material, the label chip is an on board chip, the label chip is placed in an inductance ring of the radio frequency circuit and is coupled to the radio frequency circuit, and a fixing layer used for wrapping the label chip and fixing the same on the base material is arranged on the label chip. According to the UHF RFID label, the radio frequency circuit is imbedded on the base material via wire imbedding technologies, poor consistency of product performance caused by tolerance of surface mounting technologies can be alleviated, the label chip is placed in the radio frequency circuit via a coupled mode in a disconnected manner, man-hours of workers can be prevented from being wasted by conventional lead pin welding technologies, bandwidth of the RFID label is increased, and application reliability of the RFID label in a whole solution can be increased.

The invention discloses a dispensing adhesive agent for connection of mosaics and a production process. The adhesive agent comprises, by weight, 20%-30% of plasticizers, 18%-33% of polyvinyl chloride paste resins, 0.5%-2% of curing agents, 1.0%-12% of endcapped polyurethane prepolymers, 6%-13% of nano calcium carbonate, 3%-16% of heavy calcium carbonate, 3%-23% of calcite powder, 0.1%-1% of coupling agents, 0.3%-4.5% of heat stabilizers, 0.2%-6% of water-removal agents, 0.4%-1.8% of thixotropic agents and 0%-2% of diluents. The adhesive agent for connection of mosaics does not need base materials such as paper, silk screens and the like, has excellent water resistance and can raise the bonding strength of mosaics.

The invention relates to a method for preparing a novel non-woven composite chopped strand mat, which comprises the steps of: producing a non-woven composite material, producing a powder chopped strand mat and compositing the non-woven composite material with the chopped strand mat, wherein the first step comprises the procedures of uniformly coating high-viscosity thermoplastic emulsion on the surface of the non-woven material, and then drying and rolling; the second step comprises the procedures of chopping, forming, dusting and drying glass fiber; and the third step comprises the procedures of thermally pressing and compositing the non-woven composite material at a drying channel outlet of the chopped strand mat, controlling the hot-pressing temperature to be 120-180 DEG C and the thermally-pressing speed to be 3-5kgf/cm<2>, keeping thermal pressing for 5-10s, rapidly cooling, rolling and forming. The chopped strand mat prepared by using the method has smooth surface, tight gluing, does not generate arch cambers and wrinkles and shrinkage, is good in uniformity, and can directly enter a workshop for being thermally pressed on the roof, thus the working efficiency is improved and the cost is saved. Meanwhile, because multiple procedures of resin pasting and the like are reduced, the utilization rate is greatly improved and the secondary pollution is reduced.