982results about How to "Guaranteed yield" patented technology

The invention relates to the technical field of protein enzymolysis, and discloses an intelligent control system and method for an animal protein enzymolysis production process, and the method comprises the steps: obtaining key attribute parameters of animal protein raw materials, building a raw material grading model, and obtaining initial grades of the raw materials; matching a preset grading corresponding relation library according to the initial grading to obtain an initial stage optimal production parameter range; collecting a first production parameter before enzymolysis to obtain an adjusted production parameter; starting enzymolysis according to the adjusted parameters, collecting process key parameters in real time, inputting an optimal production parameter prediction model, and predicting an optimal production parameter at the next moment; if the optimal production parameters exceed the safety range, correction is carried out; continuously performing enzymolysis according to the corrected parameters, and continuously predicting and correcting the parameters until the enzymolysis is finished; through raw material grading and parameter real-time optimization, the process parameters can be dynamically regulated and controlled according to different batches of raw materials, the production efficiency is improved to the maximum extent while the product quality is guaranteed, and remarkable intelligence and adaptability are achieved.

The invention relates to the technical field of sealing element production, in particular to a multi-layer composite sealing element forming device and process, the device comprises a fixed mold platform and a movable mold platform, the fixed mold platform is provided with a lower mold, the movable mold platform is provided with a movable plate, the movable plate is provided with an upper mold, the fixed mold platform is provided with a suction cup assembly, and the suction cup assembly is provided with a movable block; a frame is arranged at the lower end of one side of the movable block, a plurality of electric suction cups are arranged on the frame, the peripheral walls of the upper ends of the electric suction cups are slidably connected with the frame, a first air cylinder is installed on the top face of the movable block through an installation base, and the bottom face of a piston rod of the first air cylinder penetrates through the movable block and is fixedly connected with the top face of the middle of the frame; the peripheral walls of the upper ends of the guide rods are slidably connected with the moving blocks correspondingly. According to the demolding mechanism, the deformation or damage of the sealing element caused by non-uniform ejection of the ejection mechanism is avoided, the demolding efficiency is improved, the yield and the quality stability of the multi-layer composite sealing element are ensured, and the demolding requirements of the sealing elements with different specifications and requirements are met.

The invention discloses a battery detection device and method, and relates to the technical field of battery detection.The battery detection device comprises a workbench, a clamping mechanism and a turnover mechanism, a groove is formed in the surface of the workbench, a servo motor is arranged in the groove, an output shaft of the servo motor is connected with a two-way lead screw, and opposite threads are arranged at the two ends of the two-way lead screw; and moving plates are arranged at the two ends of the bidirectional lead screw, turnover mechanisms are arranged on the moving plates, one sides of the turnover mechanisms are connected with clamping mechanisms, and the clamping mechanisms can be suitable for fixing batteries of different models. The battery clamping device has the beneficial effects that batteries are placed in the fixing base, a threaded rod is rotated, a clamping plate is driven to move, so that the batteries of different sizes and models can be clamped, use is more convenient, practicability is improved, meanwhile, a driving motor works to drive a driving gear and a driven gear to rotate, and therefore the batteries on the clamping mechanism are driven to rotate; whether the outer surface is damaged or not can be observed, the battery can be conveniently and comprehensively inspected, and the yield of the battery when leaving a factory is ensured.

The invention discloses an anti-crosstalk micro-display light-emitting pixel and a manufacturing method thereof, and relates to the technical field of semiconductors. The micro-display light-emitting pixel includes: a driving backplane; the display module is arranged on the driving back plate, the display module comprises a light-emitting unit and a groove structure, the light-emitting unit is conducted with an anode contact in the driving back plate, the groove structure surrounds the light-emitting unit and penetrates through a vertical area where the display module is located, and the display module is arranged on the driving back plate. The trench structure is filled with a metal material, and the light-emitting unit is an inorganic compound semiconductor. Based on the technical scheme provided by the invention, light emitting constraint can be carried out through the through type groove structure, and better optical crosstalk isolation is realized.

The invention discloses a board-level fan-out type packaging structure and a preparation method thereof, the board-level fan-out type packaging structure comprises a first passivation layer, a chip or a rimless device is inversely arranged on the first passivation layer, the chip or the rimless device and the first passivation layer are externally coated with a plastic packaging layer, a first rewiring layer is arranged on the first passivation layer, a rewiring structure is arranged on the first rewiring layer, and a second rewiring layer is arranged on the second passivation layer. And a ball grid array structure for external interconnection is arranged on the rewiring structure. According to the invention, the forming step of the first passivation layer is advanced before the flip mounting of the chip or the passive device, and the chip or the passive device is firmly fixed by using the adhesion of the first passivation layer, so that additional auxiliary adhesive materials or process steps such as dispensing in the prior art can be replaced, the offset problem of the chip or the passive device is solved, and the production efficiency is improved. And no new process step is introduced, the product production cycle is not influenced, the product yield is guaranteed, the cost is low, and the method is suitable for industrial popularization and application.

The invention relates to the technical field of box culvert prefabricated part production, in particular to an integral box culvert assembly line construction technology which comprises the steps that preparation before construction is conducted, specifically, technical preparation, personnel preparation, material preparation and mechanical equipment preparation are conducted, and condition guarantee is provided for formal box culvert production; processing the steel bars into a steel bar cage, storing the steel bar cage and waiting for entering a mold; after the mold is installed in place, the mold is cleaned, debugged, maintained and regularly inspected; preparation work before concrete pouring, mold cleaning, oil coating, steel bar mold entering and embedded part mounting are conducted; pouring concrete; performing natural or steam curing; the box culvert is demoulded, and components are marked; the box culvert is stored and watered for maintenance; a single-circulation assembly line is adopted, box culvert production stations are arranged, all procedures of box culvert production are dynamically completed clockwise, the occupied area is reduced, meanwhile, production management and material transportation are facilitated, the production efficiency is improved, and the space utilization rate is increased.

The invention discloses a temperature-controllable preparation method for tissue temperature dissociation into single cells and application, the temperature-controllable preparation method for tissue temperature dissociation into single cells comprises the following steps: S1, providing a tissue sample, and pre-treating the tissue sample to obtain a sample block; s2, mixing the sample blocks with a compound digestive enzyme, and filtering to obtain a single-cell suspension after digestion treatment is completed; wherein the compound digestive enzyme is prepared from collagenase, hyaluronidase and papain; and selectively, S3, carrying out red removing treatment. The invention not only provides an improved preparation method of the single-cell suspension, but also has higher efficiency on the premise of ensuring the yield and activity of single cells, and provides a new strategy and tool for cancer research and treatment by particularly enriching CSCs.

The invention discloses a method and a system for improving the yield in a touch screen production process, and relates to the technical field of electric digital data processing. Comprising the steps of obtaining production instruction data, and extracting a yield improvement range based on the production instruction data; and obtaining production data, wherein the production data comprises environmental data in the touch screen production process, attribute data of the touch screen and process data of touch screen production. According to the method, the dynamic input model is constructed, so that when the yield of the touch screen is adjusted and improved, key parameters in the production process can be monitored and adjusted in real time, and therefore it is ensured that the production environment and the technological conditions are always in the optimal state; the synchronism and the stability in the data transmission process are remarkably improved, production errors caused by transmission delay are reduced, and the yield in the touch screen production process is indirectly guaranteed.

The invention belongs to the technical field of stamping dies, and particularly discloses a die for trimming and punching automobile chassis metal parts, which comprises an upper stamping die fixed at the moving end of a stamping machine and a lower stamping die fixed on the stamping machine, and a stamping die cavity for forming the automobile chassis metal parts is formed between the upper stamping die and the lower stamping die; the upper stamping die comprises multiple stages of stamping heads so that a material belt passing through a stamping machine can be machined into an automobile chassis metal part step by step. The upper stamping die further comprises a temperature control structure used for conveying refrigerants, and the temperature control structure is used for being matched with the multi-stage stamping head to adjust the first temperature value of the stamping die cavity to be within a preset temperature interval. A temperature control runner used for conveying a refrigerant is formed in the lower stamping die; the temperature control runner is communicated with the temperature control structure so as to adjust a second temperature value of the automobile chassis metal part to be within a preset temperature interval; the temperature control structure has the advantages that heat balance of the die is achieved, material resilience is reduced, finished product precision is improved, die service life is prolonged, and production stability is improved.

The extrusion-free stacking packaging carton belongs to the field of packaging cartons and comprises a carton body, two sets of partition plates are placed on the lower side of the inner surface of the carton body and distributed in parallel up and down, a supporting plate is arranged between the two sets of partition plates, and the supporting plate is in sliding connection with the inner surface of the carton body; a supporting assembly is arranged on the inner side of the box body and comprises a top plate slidably connected with the lower end of the inner surface of the box body, a guide groove is formed in the outer surface of the lower end of the box body, and a guide block is slidably connected to the inner surface of the guide groove. Through the arrangement of the supporting assembly, the box body on the upper side can be lifted and supported through the reinforcing plate, so that the pressure borne by the box body on the lower side can be reduced to a certain extent, the pressure resistance of the box body can be effectively improved, and the probability that the box body is deformed and damaged in the stacking process is reduced; and the integrity and the yield of the fruits in the box body can be ensured.

The invention relates to the technical field of sealing ring products, in particular to a plasma-resistant and low-viscous-force metal-free perfluoropolymer and a preparation method thereof. The metal-free perfluoropolymer is prepared from the following raw materials in parts by weight: 100 parts of perfluoroether rubber of a peroxide vulcanization system; 10 to 20 parts of an inorganic nitride; 1-3 parts of peroxide; and 1-6 parts of a crosslinking auxiliary agent. The prepared O-shaped rubber sealing ring is excellent in plasma resistance, no metal particles escape, the compression set is lower than 25%, and the adhesive force is lower than 50N. On semiconductor processing equipment, the sealing ring has the advantages of long service life (plasma resistance and mass loss rate lower than 5%), good sealing performance (compression set lower than 25%), low viscous force and easiness in replacement, the replacement efficiency of the O-shaped rubber ring is improved, and the yield of products (no metal particles escape) is guaranteed.

The invention relates to a comprehensive utilization method of ultra-lean vanadium titano-magnetite tailings, and belongs to the field of comprehensive utilization of solid wastes. According to the method, the purpose of resource utilization of solid waste is achieved through comprehensive utilization of the ultra-lean vanadium titano-magnetite tailings, elements such as Si and Al in the tailings are enriched while the phosphate concentrate with the grade and the recovery rate meeting production requirements is obtained, consumption of a large amount of tailings is achieved, the environment and safety problems caused by stacking of the tailings are solved, and the utilization rate of the tailings is increased. And the technical purpose of comprehensive utilization of solid wastes is achieved.

The invention relates to the technical field of photovoltaic cell preparation, and discloses a preparation process of a lower coated perovskite layer, and the process comprises the steps: obtaining a state effective value of an FTO glass film surface before the preparation of a lower interface layer, the preparation of a perovskite layer and the preparation of an upper interface layer; if the state effective value of the FTO glass film surface meets the preset requirement, carrying out a subsequent process for preparing a lower coated perovskite layer; the subsequent process comprises the steps of C60 layer evaporation, SnO2 layer preparation, P2 lineation, back electrode layer preparation, P3 lineation and edge cleaning. If the state effective value of the FTO glass film surface does not meet the preset requirement, carrying out circulating treatment on a preorder process for preparing the lower coated perovskite layer; the preorder process comprises the steps of glass cleaning, hole transport layer preparation, P1 scribing and Mark point scribing; wherein the preparation of the lower interface layer, the preparation of the perovskite layer and the preparation of the upper interface layer are carried out by adopting lower coating film preparation equipment, so that the yield of the preparation of the lower coating film perovskite layer is effectively ensured.

The invention provides cutting equipment for numerical control tool machining, and belongs to the technical field of cutting equipment. Comprising a mounting base, a chute is formed in the bottom end of the mounting base, a rubber column is mounted at the top end of the chute, a notch is formed in the top end of the mounting base, a first sliding rail is mounted at the top end of the mounting base, the outer surface of the first sliding rail is sleeved with a first sliding base, and a second sliding rail is mounted at the bottom end of the first sliding base; the bottom end of the second sliding rail is sleeved with a second sliding base, an electric push rod is mounted at the bottom end of the second sliding base, and a mounting plate is mounted at the bottom end of the electric push rod. By arranging the overturning assembly, the bottom end of a cutting waste part of a square steel cutting part is supported in an auxiliary mode, the situation that the cutting waste part subjected to first-time cutting shifts under the action of gravity is avoided, and therefore the cutting precision during second-time cutting is improved, the cutting precision during cutting of the square steel cutting part is further guaranteed, and the cutting efficiency of the square steel cutting part is improved. And meanwhile, accumulation of metal chippings generated by cutting is avoided.

The invention relates to a large glass frame automatic lifting and overturning device which comprises a supporting table, an upper glass frame used for fixing upper glass, a lower glass frame used for fixing lower glass, a lifting driving mechanism used for driving the upper glass frame to ascend and descend and an overturning driving mechanism used for driving the upper glass frame to overturn. And the upper glass is positioned above the lower glass. The lifting and overturning device is ingenious in structure and convenient to operate, the large glass frame body is arranged, an exposure material is placed between the upper glass and the lower glass, and the stability of the exposure material in the exposure process can be effectively guaranteed; by arranging the lifting driving mechanism, rapid separation between the upper glass and the lower glass can be realized, so that the winding and unwinding speed of the exposure material is increased, the probability of splicing, dislocation and other problems of the exposure material is reduced, the waste of the exposure material is reduced, the yield of the exposure process is ensured, the use cost is reduced, and the use experience of a user is enhanced.

The utility model discloses a cake stuffing injection device which comprises an upper mounting plate, a lifting driving assembly arranged above one side of the upper mounting plate, a rotary driving assembly arranged below the lifting driving assembly and connected to the lifting driving assembly, and a stuffing injection assembly arranged on the other side of the upper mounting plate. The rotating driving assembly comprises a rotating air cylinder arranged below the lifting driving assembly, a lower mounting plate integrally in an I shape, and a rotating driving structure arranged on an output shaft of the rotating air cylinder, wherein the upper end of the lower mounting plate is connected to the lifting driving assembly. And the shearing structure is arranged on one side, close to the stuffing injection assembly, of the rotary driving structure and is positioned below the stuffing injection assembly. According to the cake stuffing injection device, cake stuffing can be accurately cut off, the cake stuffing can be accurately injected into a cake mold, the purpose of injecting the stuffing into a cake is achieved, the accuracy is high, the automation degree is high, manpower is not needed, and time and labor are saved.

The utility model provides a multi-core emulsion droplet preparation chip and an emulsion droplet preparation system, the multi-core emulsion droplet preparation chip comprises a first glass chip and a second glass chip, the first glass chip is internally provided with a first micro-channel, the second glass chip is internally provided with a second micro-channel, and a multi-core emulsion droplet preparation process is carried out. The first microchannel and the second microchannel are respectively subjected to corresponding hydrophilic and hydrophobic modification treatment, and then the first glass chip and the second glass chip are spliced and butted, so that the required multi-core emulsion droplet preparation chip can be formed, and compared with the related technology, the multi-core emulsion droplet preparation chip is simple in manufacturing process, high in yield, convenient and reliable in modification operation and suitable for large-scale production. And the use performance is obviously improved.

The invention provides a multichannel light emission chip array based on an asymmetric multi-quantum well technology, an asymmetric multi-quantum well layer is composed of compressive strain InGaAlAs quantum wells and tensile strain InGaAlAs quantum barriers, the compressive strain InGaAlAs quantum wells and the tensile strain InGaAlAs quantum barriers are distributed at intervals, and the light-emitting wavelengths of the compressive strain InGaAlAs quantum wells are gradually reduced from top to bottom to form an asymmetric structure; the grating layer is of an array structure composed of a plurality of gratings, a plurality of laser units are formed, the grating layer is manufactured by adopting a reconstruction equivalent chirp technology, a sampling grating structure with a uniform grating period is manufactured in each laser unit through holographic photoetching and ultraviolet lithography in sequence, and pi phase shift is arranged in the center of the sampling grating. The invention also provides a preparation method of the multi-channel light emission chip array. According to the invention, accurate control of emission wavelength can be realized, sufficient gain is provided for each laser unit through the quantum well with an asymmetric structure, the single-mode yield and transmission capacity are improved, the preparation difficulty of the grating is simplified, and the demand of emerging calculation application for the Internet transmission rate is met.

The invention discloses a preparation method of patchouli oil volatile oil, and relates to the technical field of patchouli oil volatile oil preparation, the preparation method of patchouli oil volatile oil is realized through patchouli oil volatile oil preparation equipment, and the patchouli oil volatile oil preparation equipment comprises a rack, a pogostemon cablin volatile oil containing mechanism is arranged in the middle of the inner side of the rack, and a driving mechanism is arranged at the top of the inner side of the rack. According to the device, anhydrous sodium sulfate particles can be automatically and quantitatively added, waste of anhydrous sodium sulfate is avoided, meanwhile, after dehydration is completed, pogostemon cablin volatile oil remaining on the surfaces of the anhydrous sodium sulfate particles can be recycled, and the used anhydrous sodium sulfate particles are automatically output; the yield of the pogostemon cablin volatile oil is guaranteed, meanwhile, the anhydrous sodium sulfate particles do not need to be manually cleaned, in addition, the anhydrous sodium sulfate particles can be vertically arranged in the water-containing pogostemon cablin volatile oil and continuously rotate, and then the dehydration effect is guaranteed.

The invention provides a semiconductor processing method. The semiconductor processing method comprises the following steps: providing a wafer comprising a silicon layer, a dielectric layer and a bonding layer; metal layers are arranged in at least part of the cutting channels; manufacturing a metal protection layer on the surface of the bonding layer; sequentially etching the metal protection layer, the bonding layer and the dielectric layer along the cutting channel by adopting dry etching until the metal layer is etched, and forming a first etching groove section; the bottom of the first etching groove section is etched through laser etching until the metal layer is removed, and a second etching groove section is formed; etching downwards according to the width of the first etching groove section along the direction of the cutting channel until a preset depth in the silicon layer is reached; thinning the surface, deviating from the dielectric layer, of the silicon layer until the cutting channel is completely separated; and removing the metal protection layer to form an independent chip. The metal protection layer is added on the surface of the bonding layer, and the laser etching position is arranged below the bonding interface, so that the interface protection capability of the bonding layer is remarkably improved, warping is reduced, and the flatness and cleanliness of the bonding layer are ensured.

The utility model relates to the technical field of automatic cutting equipment, in particular to novel automatic cutting equipment for building wall materials, which comprises a frame body, Y-axis guide rails are fixedly arranged on two sides of the frame body, a movable inverted U-shaped seat is arranged outside the frame body, and a Y-axis slider is arranged on the inner side of the inverted U-shaped seat. A Y-axis motor is fixedly arranged on the inverted U-shaped seat; z-axis guide rails and tool rests in sliding fit with the Z-axis guide rails are arranged on two side plates of the inverted-U-shaped base respectively, and the tool rests are driven by a Z-axis motor to move along the Z-axis guide rails; a forming tool used for machining a V-shaped groove along a to-be-cut line of a wall material and a cutting tool used for cutting the wall material along the V-shaped groove are arranged on the portions, on the two sides of the inverted-U-shaped base, of the tool rest correspondingly, and the cutting center of the forming tool and the cutting center of the cutting tool are located on the same straight line. The cutting device is convenient and practical, low in operation difficulty and high in automation degree, meets the requirement of a continuous production process, firstly forms and then cuts, and greatly improves the cutting yield.

The invention relates to the technical field of forming equipment, in particular to non-cutting extrusion forming equipment for a hollow frame of a display. Comprising a rack, and further comprises an unwinding component, a component for continuously unwinding, derusting and pre-cleaning a strip, a derusting, pre-cleaning, differential and reciprocating tensioning mechanism for unwinding the strip, a tensioning, reciprocating ballasting and forming mechanism for unwinding the strip, an extrusion forming and shaping mechanism for unwinding the strip, and a shaping mechanism for shaping the extruded strip. The device has the beneficial effects that the device can efficiently complete non-cutting extrusion forming operation of the hollow frame of the display, and during strip extrusion forming, the device can effectively improve the yield of the hollow frame of the display during extrusion forming through pre-rust removal, pre-cleaning, pre-tensioning and vibration pressing extrusion modes.

The present invention relates to the field of gas wellhead management technology, and specifically discloses a gas wellhead remote monitoring method and an intelligent control system, wherein the method comprises the following steps: S1: obtaining a curve of the minimum liquid-carrying flow rate changing with the production pressure difference and an opening-flow function; S2: obtaining the optimal production pressure difference of the gas well and setting the production pressure difference range; obtaining the optimal critical liquid-carrying flow rate and substituting it into the opening-flow function, and adjusting the opening of the valve on the gas production tree; S3: obtaining the formation pressure and the bottom hole flow pressure in real time, and calculating the comparative production pressure difference; when the comparative production pressure difference does not belong to the production pressure difference range, adjusting the casing pressure until the comparative production pressure difference is equal to the optimal production pressure difference. The present invention can maintain the production pressure difference of the gas well while preventing liquid accumulation, thereby ensuring the economic benefits and recovery rate of the gas well.

The utility model provides a mounter, which comprises a base, the base is provided with a mounting conveying line, an upper visual assembly, a feeding conveying line, a lower visual assembly, a pickup assembly, a mounting driving assembly, a pickup visual assembly and a controller, and the mounting conveying line is used for conveying a carrier carrying a piece to be mounted to a mounting position and sending out the carrier carrying the piece to be mounted; the upper visual component is positioned above the mounting position and is used for identifying the orientation of the article positioned at the mounting position; the feeding conveying line conveys in the direction towards the mounting position, and the output end of the feeding conveying line is provided with a material taking position. The lower visual assembly is located between the material taking position and the mounting position; the pickup assembly is used for picking up or mounting materials; the driving end of the mounting driving assembly is connected to the pickup assembly and is used for driving the pickup assembly to move to pick up or mount materials; the picking visual assembly is arranged at the driving end of the mounting driving assembly and is used for identifying the orientation of an object below the picking assembly; and the controller is connected to each component. The surface mounting machine is high in surface mounting efficiency and high in product yield.

The utility model discloses a multi-station automatic production hot press molding device which comprises a base frame, a control system and a protective door, the control system and the protective door are arranged on the base frame, and a conveying mechanism, a heating mechanism, a molding mechanism, an edge cutting mechanism and an extrusion discharging mechanism are sequentially arranged on the base frame in the feeding direction. The automatic sheet processing equipment is convenient to use, the conveying mechanism, the heating mechanism, the forming mechanism, the edge cutting mechanism and the extruding and discharging mechanism are combined in one equipment, so that the sheet processing process can be automatic, the whole process of feeding, processing and discharging can be completed by only one worker, the number of workers is reduced, the production cost of an enterprise is reduced, and the production efficiency is improved. And automatic equipment can improve the production efficiency of products and guarantee the yield of the products, multi-station assembly can be carried out according to actual requirements, different production requirements are met, and different machining environments are adapted.

The invention relates to the technical field of battery piece production, in particular to an interconnection method of a main-grid-free back contact battery assembly, which comprises the following steps of: printing insulating glue on a positive electrode fine grid line or a negative electrode fine grid line; the battery piece printed with the insulation paste is dried; printing conductive adhesive on the fine grid lines which are not printed with the insulating adhesive, wherein the conductive adhesive is composed of a weld-aid part and a conductive connecting part; laying a welding strip on the battery piece, and pressing the welding strip on the conductive adhesive; the conductive adhesive is dried for preliminary curing, and the welding strip is pre-fixed on the battery piece; and then carrying out lamination welding treatment to realize alloying connection between the welding strip and the fine grid line. According to the invention, the conductive adhesive composed of the welding aid part and the conductive connecting part is used together with the insulating adhesive, so that the problem that the battery piece needs to be baked for multiple times when the traditional solder paste / insulating adhesive / curing adhesive is combined for use is solved, the process is simplified, the warping condition of the battery piece is reduced, the yield of the battery piece is ensured, and the quality of the battery piece is ensured.

The invention discloses aluminum alloy section extrusion forming equipment which comprises a base, an extrusion container installed on the base, a die installed at one end of the extrusion container and used for conducting extrusion forming on an extruded aluminum alloy section and an extrusion head installed at the other end of the extrusion container. The support frame is mounted on the base and is positioned on the outer side of the extrusion end of the extrusion cylinder; according to the aluminum alloy profile extrusion forming equipment, the shearing mechanism is improved, that is, the guiding mechanism is arranged at the front end of the shearing mechanism, on one hand, the guiding mechanism can guide an aluminum alloy profile which is just subjected to extrusion forming, and on the other hand, the guiding mechanism can guide the aluminum alloy profile which is just subjected to extrusion forming; and meanwhile, the U-shaped aluminum alloy profile can be cooled in an accelerated mode, so that the aluminum alloy profile is assisted to be rapidly fixed and formed, and then the yield of extrusion forming of the aluminum alloy profile is guaranteed.

The invention relates to the technical field of battery production equipment, and discloses a flange-free square steel shell battery welding auxiliary device and a welding method. The welding auxiliary device for the flange-free square steel shell battery comprises a support, a positioning mechanism and a pressing mechanism, and the positioning mechanism is installed on the support and used for containing the battery; the pressing mechanism comprises a pressing plate assembly, a connecting arm, a first driving assembly and a first guide structure; the first driving assembly is installed on the support, the output end of the first driving assembly is in transmission connection with the connecting arm, the connecting arm is in sliding connection with the pressing plate assembly through the first guiding structure, the pressing plate assembly is located above the positioning mechanism, and a first avoiding notch and a second avoiding notch are formed in the two sides of the connecting arm in the Y direction. The projection parts of the first avoiding gap and the second avoiding gap in the X direction are overlapped; the first driving assembly can drive the connecting arm to move till one to-be-welded edge of the flange-free square steel shell battery is exposed out of the first avoiding notch or the second avoiding notch. The welding quality and the welding efficiency can be effectively improved.

The invention relates to the technical field of phosphorus chemical solid waste treatment, and particularly discloses a reverse-direct flotation desilicication and impurity removal combined process for phosphogypsum. According to the process, C12-18 alkyl dimethyl ethyl benzyl ammonium chloride is used as a reverse flotation reagent, a mixture of R-NH2 or hydrochloride thereof and R-OSO3Na according to a certain proportion is used as a direct flotation reagent, R in the direct flotation reagent is alkyl and is the same as the alkyl in the reverse flotation reagent, and through the one-reverse-one-direct flotation process, the content of the R in the reverse flotation reagent is reduced, and the content of the R in the reverse flotation reagent is reduced. And various impurities such as silicon, organic matters and fluorine in the phosphogypsum can be synchronously removed. After flotation, the yield of concentrate can reach 75%, the grade of CaSO4. 2H2O is 97.7% or above, and the desilicication rate reaches 75% or above. The method is simple in process, efficient and low in cost.

The invention relates to preparation of a cefazolin compound, in particular to a preparation method of a cefazolin acid three-position intermediate TDA. The preparation method comprises the following steps: carrying out condensation reaction on 7-ACA and MMTD serving as raw materials, dimethyl carbonate serving as a solvent and a boron trifluoride dimethyl carbonate complex and glacial acetic acid serving as catalysts to obtain condensation reaction liquid; adding EDTA (Ethylene Diamine Tetraacetic Acid) and sodium pyrosulfite into water, carrying out stirring reaction, transferring the condensation reaction liquid into water, and continuously carrying out heat-preservation stirring, so as to obtain a hydrolysis reaction liquid; and adding a sodium carbonate solution into the hydrolysis reaction solution while stirring, adjusting the pH value, growing crystals, and then performing suction filtration, washing and drying to obtain a finished product. A boron trifluoride dimethyl carbonate complex-glacial acetic acid catalysis method is adopted, the product quality and yield are guaranteed in industrial production, meanwhile, the reagent usage amount and the waste liquid generation amount are reduced, the production cost and the environment pressure are reduced, normal reaction is maintained at normal pressure, and the reaction is prevented from being too severe.