66results about How to "Reduce problems" patented technology

The invention relates to the technical field of high-temperature alloys, and particularly discloses a smelting preparation process of a large-specification bar capable of resisting the temperature of 800 DEG C. The invention discloses a smelting preparation process of a large-specification bar resistant to the temperature of 800 DEG C. The smelting preparation process specifically comprises the following steps of vacuum induction smelting, annealing, first-time vacuum consumable smelting, electrode forging, second-time vacuum consumable smelting, consumable ingot homogenizing annealing and bar forging in sequence. According to the method, the large-size bar resistant to the temperature of 800 DEG C is prepared through the process, the bar quality is improved, the prepared large-size bar has excellent tensile property and high temperature resistance, the occurrence probability of black spots and white spots is reduced, and meanwhile homogenization control over bar components is achieved.

The invention provides a low-flash-point anti-glare display panel and a display device. The display panel comprises a substrate, a light-emitting layer, a diffusion layer and an anti-glare layer which are arranged in a stacked mode in the first direction. The substrate is located on the backlight side of the light-emitting layer, the diffusion layer is located on the light-emitting side of the light-emitting layer, and the anti-glare layer is located on the side, away from the light-emitting layer, of the diffusion layer; the diffusion layer comprises a first medium and a second medium, the second medium is distributed in the first medium along a second direction, the second direction is perpendicular to the first direction, and the refractive index of the second medium is greater than that of the first medium. When light emitted by the light-emitting layer is to be emitted to the first medium from the second medium, due to the fact that the refractive index of the second medium is larger than that of the first medium, the light can be reflected in the second medium until the light is emitted to the anti-glare layer, due to the fact that the light is scattered, generation of random moire fringes is reduced, and flash points are reduced.

A passive protective net device suitable for a tunnel portal slope comprises a protective net, a fixing frame, a pull rope, a solar cell panel, a storage battery, an element box, an anchor rod and a short message module and further comprises a control circuit, a detection mechanism, a fixing frame inclination detection circuit and a protective net and pull rope detection circuit. The fixing frame is installed in front of a monitoring area, the lower ends of the two pull ropes are installed on the two anchor rods respectively, the two stretching upper ends are installed at the upper end of the fixing frame, and the protective nets are installed on the two sides of the pull ropes and the rear side of the fixing frame respectively. The storage battery, the short message module, the control circuit, the detection mechanism, the fixing frame inclination detection circuit, the protective net and the pull rope detection circuit are installed in the element box, the solar cell panel is installed on the rear outer side of the element box, and the front side of the element box is installed on the rear side of the fixing frame. The tension springs can play a role in buffering and protecting the protective net, and related personnel can be remotely prompted to go to the site for disposal in a short message mode at the first time when rockfall occurs, the protective net or the pull rope is damaged, and the fixing frame inclines or collapses.

The utility model discloses a wire guide mechanism capable of reducing a wire outlet angle and a fishing reel thereof. The wire guide mechanism comprises a wire guide and a transmission lead screw, a wire guide hole is formed in the wire guide gauge; the transmission lead screw comprises a screw rod and a nut capable of translating along the screw rod in a reciprocating manner; the device further comprises a swing arm and a swing support, the tail end of the swing arm is rotationally connected with the nut, the lead gauge is connected to the upper side of the head end of the swing arm, and a hinge point is further arranged between the head end and the tail end of the swing arm. The swing support is fixedly arranged relative to the position of the transmission lead screw, and the swing arm is rotationally connected with the swing support through a hinge point. When the nut of the transmission lead screw moves along the screw rod, the swing arm can be driven to rotate around the circle center of the hinge point, so that the wire guide can swing. According to the fishing reel, the swinging arm is arranged, the position of the guide wire gauge can be extended through the swinging arm, the guide wire gauge is made to be far away from a wire cup of the fishing reel, and therefore the angle of appearance and take-up of the fishing reel is effectively reduced, and the possibility that a fishing wire is broken in the using process of the fishing reel is reduced.

The invention relates to the technical field of multi-core optical fiber automatic alignment, in particular to a multi-core optical fiber alignment method and device based on a fiber core edge, which mainly focuses on a fiber core edge image on an image instead of overall brightness by acquiring the fiber core edge image and performing an edge cross-correlation algorithm through the fiber core edge image. Therefore, even if the welding end face of the multi-core optical fiber has scratches, stains or other damages, the optical fiber can be accurately aligned, and the influence of factors such as damage to the end face of the optical fiber and uneven brightness can be effectively eliminated; on the other hand, the edge cross-correlation algorithm can effectively eliminate common correlation false peaks in a conventional cross-correlation algorithm and reduce misjudgment conditions, and the edge cross-correlation algorithm significantly reduces the occurrence of false peaks and improves the accuracy of optical fiber alignment by extracting the edge features of the image; by accurately aligning the multi-core optical fibers, perfect contact between the end faces of the optical fibers can be ensured, so that loss in signal transmission is reduced, and the service life of an optical fiber system is prolonged.

The invention relates to a semiconductor device and a preparation method thereof. The preparation method comprises the steps that a pseudo gate structure is formed on a substrate, and the pseudo gate structure comprises a pseudo gate electrode and a protective dielectric layer covering the pseudo gate electrode; forming a first interlayer dielectric layer on the substrate and the dummy gate structure, the first interlayer dielectric layer covering the substrate and the dummy gate structure; executing a first grinding process to remove a part of the first interlayer dielectric layer so as to expose the protective dielectric layer; forming a buffer layer on the first interlayer dielectric layer and the protective dielectric layer; and performing a second grinding process to remove at least a portion of the buffer layer and the protective dielectric layer to expose the dummy gate electrode. The hardness of the buffer layer is greater than that of the first interlayer dielectric layer.

The present application relates to a kind of catalyst for hydrogen chloride oxidation preparation chlorine and its preparation method and application.The preparation method includes: after carrier substrate, metal tantalum powder, binder solution are mixed, extrusion forming is obtained green body, the green body is prepared composite carrier by calcination, the mass fraction of metal tantalum powder in the composite carrier is 5%-30%;Inorganic salt containing catalytically active element is made into solution and is placed in the composite carrier, and after drying, pre-product is obtained, and the pre-product is prepared catalyst by calcination.The preparation method described in the present application prepares high thermal conductivity composite carrier, not only effectively improves the heat conduction efficiency of catalyst, guarantees the effective activity of catalyst, but also guarantees the stability of composite carrier, thereby effectively prolongs the life of catalyst.

The present application relates to the field of polymer polymerization processing and foaming forming, and discloses a kind of full biodegradable sponge preparation system and method, comprising: the pressure fluctuation curve in collection channel is collected and viscosity parameter and pressure fluctuation change rate are calculated, according to which the injection flux of foaming agent is formulated, while controlled electric field is applied according to pressure fluctuation change rate at the outlet end, the radial change of flow passage cross-sectional area is utilized by piezoelectric deformation to adjust local resistance flow back pressure, the pressure drop change rate when material passes through convergent module is stabilized, the heat-sensitive chain scission loss of degradable material is constructed according to the hedging mechanism, effectively cooperate with the injection flux of foaming agent and the strength of dilute melt, eliminate the cell body bubble collapse defect caused by the imbalance of multiphase interface viscoelasticity dissipation, under the premise of avoiding adding exogenous chemical crosslinking agent, improve the molecular weight retention rate of polymer main chain segment, synergistically enhance the isotropic narrow distribution of cell pores and mechanical toughness of sponge finished product.

A wafer photoresist film pasting press-fitting device comprises a lower shell, an electric negative pressure vacuum pump, an air compressor, an upper cover, a table disc, an electric push rod, an air bag and an exhaust valve. A connecting pipe is installed at the side end of the lower shell, the outer side end of the connecting pipe is connected with the air inlet end of the electric negative-pressure vacuum pump, a fixing pressing ring is installed at the lower end in the upper cover, and the outer side of the air bag is installed on the inner side of the fixing pressing ring. An air inlet pipe is installed on one side of the air bag and connected with an air compressor exhaust pipe. The multiple sets of electric push rods are installed at the lower end in the lower shell, and the outer sides of the lower end of the table plate are installed at the upper ends of the multiple sets of electric push rods correspondingly. According to the utility model, the photoresist film can be uniformly adhered to the surface of the wafer, so that the photoresist has better fluidity when being melted, and can be better pressed into a groove in the surface of the wafer; and through water cooling of the film-pasted wafer, the photoresist can be cured within the time as short as possible, and the cooling time is shortened. According to the utility model, the production efficiency is correspondingly improved on the basis of ensuring the product quality.

The utility model discloses a stirrer for producing a liquid alkali-free accelerator, which comprises a mounting frame, the mounting frame comprises a bottom frame and a carrier plate arranged at the top end of the bottom frame, a stirring component is arranged in the middle of the carrier plate, and the stirring component comprises a driving motor, a fixed rotating shaft arranged at the output end of the driving motor and stirring blades arranged on the outer side of the rotating shaft. A stirring container is arranged on the outer sides of the stirring blades, each stirring blade comprises a connecting plate and a corner brace arranged on the outer side of the connecting plate, a side plate is arranged on one side of each corner brace, blades are fixed to the outer sides of the side plates and drive liquid in the barrel body to rotate, and the multiple sets of stirring blades are fixedly connected with the side plates through locking bolts; the stirring device is simple in structure, convenient for a user to disassemble, install and fix, and can be replaced according to different sizes of barrel bodies and stirring materials, so that the rapid stirring effect is achieved, the stirring effect is improved, and the stirring materials at the bottom end can be conveniently driven to synchronously rotate by a chassis and a top piece structure at the bottom end of the rotating shaft to avoid deposition.

The invention relates to the technical field of shield construction, in particular to a shield operation bi-component slurry integrated storage and preparation conveying system and a use method.The shield operation bi-component slurry integrated storage and preparation conveying system comprises a structure supporting assembly and a dry powder supply system, the front end of the structure supporting assembly is connected with the tail of a shield tunneling machine, and side platforms are installed on the two sides of the structure supporting assembly correspondingly; a slurry mixing system, a slurry storage system and an automatic control system are mounted on the side platform, and a fluid supply system is mounted in the automatic control system; the discharging end of the dry powder supply system is communicated with the slurry mixing system, the discharging end of the slurry mixing system is communicated with the slurry storage system, the discharging end of the slurry storage system is communicated with the shield tunneling machine, and the discharging end of the fluid supply system is communicated with the slurry mixing system. The automatic control system controls the material delivery amount of the dry powder supply system, the fluid supply system, the slurry mixing system and the slurry storage system. The technical problem that synchronous grouting equipment in the prior art occupies a large space of a trolley and cannot run synchronously with a shield tunneling machine is solved.

The present application discloses a question-and-answer method for code information and related equipment; the embodiment of the present application can generate answer content for code processing questions; obtain the current generated answer content; determine at least one reference content unit sequence based on the content unit sequence at the preset detection position in the generated answer content; and count the number of occurrences of each reference content unit sequence at the preset detection position in the generated answer content; when sampling candidate content units belonging to the preset detection position during the answer generation process, the target content unit sequence composed of each candidate content unit and associated content unit to be sampled is matched with each reference content unit sequence, so as to sample the answer content from each candidate content unit according to the number of occurrences of the sequence corresponding to the target content unit sequence. In the embodiment of the present application, the occurrence of repeated content in the answer is reduced. Therefore, this scheme can improve the quality of generated answers.

The invention relates to the technical field of oil painting brush assembly, and particularly discloses an intelligent pen handle pushing mechanism applied to an automatic bristle loading machine, which comprises a first telescopic piece, a second telescopic piece, a third telescopic piece, a fourth telescopic piece and a fourth telescopic piece, and the first telescopic piece is mounted on a side plate through a mounting plate; and the output end of the first telescopic piece is provided with the first air blowing plate, and the first air blowing plate is provided with a plurality of first air blowing holes. According to the automatic hair filling machine, the air blown out of the first air blowing holes blows down the pen handles blocking the first air blowing holes, so that the pen handles located between every two adjacent first air blowing holes continue to stay on the top plate, and the situation that two or more pen handles which are sleeved together roll to the conveying belt and are conveyed to the automatic hair filling machine can be effectively avoided; therefore, the normal operation of the automatic bristle filling machine is ensured, and the damage of two or a plurality of pen handles which are sleeved together during the operation of the automatic bristle filling machine is effectively avoided.

The invention discloses a MINI RGB LED lamp bead with a built-in resistor and a preparation method of the MINI RGB LED lamp bead, and relates to the technical field of LEDs, the MINI RGB LED lamp bead with the built-in resistor comprises a substrate, a first chip, a second chip, a third chip and a chip resistor; the front surface of the substrate is provided with a front circuit, the back surface of the substrate is provided with a back circuit, and the front circuit and the back circuit are connected through a through hole; the front circuit comprises a die bonding area, a bonding wire area, an insulating area and a groove area; the die bonding area comprises a first die bonding area, a second die bonding area and a third die bonding area which are separated from one another, the first chip is arranged in the first die bonding area, the second chip is arranged in the second die bonding area, and the third chip is arranged in the third die bonding area; a groove is formed in the groove area, and the chip resistor is arranged in the groove and connected with the first chip in series. According to the invention, burning of the lamp beads and caterpillars on the display screen due to water vapor permeation can be reduced, so that the process yield and the display effect are improved.

The utility model relates to the technical field of gift box lining paper pasting, and discloses a gift box lining paper automatic pasting device which comprises an operation table, the right side of the top of the operation table is fixedly connected with a supporting table, the right side of the supporting table is fixedly connected with an air cylinder, and the output ends of the two air cylinders penetrate through the right side of the supporting table and are fixedly connected with a push plate. A baffle is fixedly connected between every two adjacent supporting tables, mounting blocks are fixedly connected to the tops of the supporting tables, transmission columns are rotationally connected between every two adjacent mounting blocks, and a servo motor is fixedly connected to the front side of the mounting block on the front side. According to the gift box pasting device, the air cylinder is started to drive the push plate to push out gift boxes, then the sliding gift boxes are conveyed at a constant speed through the conveying column, the gift boxes accurately slide to the top of lining paper to be pasted, and the positioning bolt is rotated to accurately control the moving direction of the lining paper through the limiting plate.

A liquid spreading device includes a manifold block, a first flow channel is arranged in the manifold block, a first fluid inlet and a first fluid outlet connected to the first flow channel and a plurality of slide interfaces are arranged on the manifold block, each slide interface has a first hole, and the first hole of each slide interface is docked with one of the flow channel inlet and the flow channel outlet of the flow cell slide. An inlet valve device, a bypass valve device and a plurality of outlet valve devices are arranged on the manifold block, and the inlet valve device, the outlet valve device and the slide interface correspond to each other and are arranged on the fluid path from the corresponding slide interface to the first flow channel. The first flow channel includes a first section and a second section, and the bypass valve device is arranged between the first section and the second section and is used to control the connection or disconnection between the first section and the second section, the inlet valve device is connected to the first section, and the outlet valve device is connected to the second section. The present application also provides a liquid spreading method, a liquid spreading system, a combined device and a liquid passing device. The present application realizes the rapid and effective spreading of the fluid.

The utility model discloses a measuring tool for cutting hollow glass, and relates to the field of glass processing. The measuring tool for cutting the hollow glass comprises a fixed frame and a conversion mechanism mounted at the bottom of the fixed frame, the switching mechanism is provided with a blade, the top of the blade is fixedly connected with a fixing barrel, a clamping column is arranged in the fixing barrel, four sets of clamping channels are arranged on the periphery of the clamping column and connected with clamping blocks in a clamped mode, the other ends of the clamping blocks are fixedly connected with fixing rods, the tops of the fixing rods are connected with the bottom of a fixing frame, the fixing frame is connected with a graduated scale, and the graduated scale is connected with an inserting rod. The top of the graduated scale is provided with a fixing block, and the top of the sucker is provided with an insertion rod. According to the measuring tool for cutting the hollow glass, the blade can be freely converted in the vertical direction and the parallel direction, the blade can better mark, and the probability that glass slag appears around the cut hollow glass is reduced.

A Mylar film bonding mold includes a lower mold with a placement groove on its surface and extension grooves on both sides. A clamping block is disposed within each extension groove. A through hole is provided on the lower mold, and a connecting rod is disposed within the through hole. A limit ring and a pusher are provided on the connecting rod. A cutting blade holder with a cutting head is also provided on the lower mold. The placement groove of the lower mold perfectly matches the dimensions of the sheet metal, allowing for precise fixing of the sheet metal position. The cooperative design of the extension grooves and clamping blocks ensures strict alignment between the adhesive layer of the Mylar film and the edge of the sheet metal through mechanical limiting. The Mylar film and sheet metal are completely aligned and cannot wobble, reducing the occurrence of air bubbles and fuzz on the Mylar film, improving the pass rate, and completely avoiding the offset problem during manual bonding.

The utility model discloses an automatic dough rolling and kneading machine which comprises a dough kneading machine body, a control panel is fixedly connected to the outer wall of the dough kneading machine body, a dough outlet is formed in the outer side of the dough kneading machine body, a workbench is fixedly connected to the end, close to the dough outlet, of the dough kneading machine body, and a conveying belt is fixedly connected to the top end of the workbench. An adjusting device is arranged on the outer side of the workbench, a fixing rod is fixedly connected to the outer side of the workbench, when the height of the dough rolling roller needs to be adjusted, an inserting rod is moved downwards, the inserting rod moves downwards to extrude a spring, meanwhile, the inserting rod is separated from the interior of an inserting groove, at the moment, a rotating button is separated from limiting, the rotating button is rotated, and the rotating button drives a gear to rotate; the gear rotates to drive the rack to move upwards or downwards, the rack moves to drive the dustproof bin to move up and down, and the dustproof bin moves up and down to drive the rolling roller to move, so that different use requirements of users are met, and the application range of the device is widened.

The present invention belongs to an image processing method, and specifically relates to a method for eliminating mismatches of image feature points based on consistent adjacency relations. The method comprises the following steps: step 1: extracting feature points; extracting feature points and constructing description vectors; step 2: matching feature points; step 3: obtaining an inner point set; step 4: constructing a neighborhood relationship; step 5: calculating; step 6: calculating the restored inner point set; step 7: obtaining a complete inner point set. The significant effects of the present invention are: (1) constructing a stable local adjacency relationship based on the Delaunay partitioning algorithm. (2) Based on the geometry of the Delaunay triangulation, the geometric constraints and stability of the consistent adjacency relationship model are enhanced. (3) A decision is added to perform pre-filtering of external points. The robustness of the algorithm is improved under non-rigid deformation and abnormally high external point rate (higher than 90%) data. (4) A global description method based on triangle similarity is proposed to improve the recall rate of the algorithm.

The utility model relates to detection equipment, in particular to detection equipment of a circuit board for an LED lamp. The detection equipment for the circuit board for the LED lamp comprises a supporting block, a shell, a motor, a rotating frame, a fixed frame and the like, the supporting blocks are used for supporting the whole equipment, the shell is fixedly connected between the supporting blocks, the motor is installed on the right portion of the shell, the rotating frame is rotationally arranged on the right portion of the shell, an output shaft of the motor is fixedly connected with the rotating frame, and the fixing frame is fixedly connected to the left portion of the rotating frame. According to the utility model, the display is used for comparing welding spot and circuit flat cable information collected on the circuit board by the optical lens with qualified parameters of a database in the display, and defects are automatically marked and displayed through the display, so that the detection efficiency is effectively improved, and defective products are reduced.

The image non-uniformity correction method and device, the infrared image device and the computer readable storage medium provided by the embodiments of the present application, the method comprises: acquiring a same group of in-focus images and out-of-focus images collected for a target scene; respectively decomposing the in-focus images and the out-of-focus images through wavelet transform to obtain corresponding in-focus sub-band images and out-of-focus sub-band images; determining a fixed image noise component contained in a high-frequency component in the out-of-focus sub-band images based on the high-frequency component; determining a corresponding image component estimation value according to a sub-band coefficient of the in-focus sub-band images and the corresponding fixed image noise component; reconstructing the image component estimation value through inverse wavelet transform to obtain a non-uniformity corrected image of the target scene, thus avoiding information loss and redundancy of the image signal in the decomposition process, so that the non-uniformity corrected image of the target scene is obtained more quickly and more clearly.

A welding wire guiding and conveying structure belongs to the technical field of welding and comprises a lower shell and an upper shell, an elastic tightening device is mounted between the lower shell and the upper shell, a driving wheel is rotatably mounted in the lower shell, a pressing wheel is rotatably mounted in the upper shell, and a wire feeding pipe is slidably mounted on the left surface of the lower shell in a penetrating manner. A locking device used for clamping and fixing the wire inlet pipe is installed on the left surface of the lower shell, a conical part is arranged at the right end of the wire inlet pipe, a wire outlet pipe is fixedly installed on the right surface of the lower shell in a penetrating mode, a conical inserting groove is formed in the inner surface of the left end of the wire outlet pipe, and a rubber gasket is arranged in the driving wheel in a sleeved mode. The wire feeding device can accurately penetrate through the wire feeding pipe without deviation and smoothly enter the wire discharging pipe, and the wire feeding accuracy and efficiency are greatly improved.

The present invention discloses a heat exchange device and method for a data center, the device comprises a sealed shell, and an inter-row air conditioner stacked inside the sealed shell, servers are stacked on the left and right sides of the inter-row air conditioner respectively, a first gas storage tank, a second gas storage tank and an air pump are arranged outside the sealed shell, the valve seats of the first gas storage tank and the second gas storage tank enter the inside of the sealed shell through a first air inlet pipe and a second air inlet pipe respectively, and the air pump enters the inside of the sealed shell through the air pump pipe. The beneficial effect of the present invention is that the first gas storage tank and the second gas storage tank are arranged outside the sealed shell, helium and auxiliary gas are injected into the sealed shell, and the gas in the sealed shell is circulated internally by the inter-row air conditioner, the mixed gas can multiply the convective heat transfer coefficient of the heat exchange device, and the heat exchange efficiency is significantly higher than the existing air heat dissipation, thereby reducing the occurrence of local hot spots and indirectly reducing the operating burden of the cooling system.

The present application relates to the field of textile technology, and more specifically, it relates to a dyeing process for improving fabric floating color and color stains. A dyeing process for improving fabric floating color and color stains comprises the following steps: pre-shrinking: first immersing the grey cloth in water, then immersing it in a first degreasing agent aqueous solution, and finally washing it with water to obtain a pre-shrinked grey cloth; the degreasing agent in the first degreasing agent aqueous solution is degreasing agent DO-1173; degreasing: immersing the pre-shrinked grey cloth in a second degreasing agent aqueous solution, and then washing it with water to obtain a degreasing grey cloth; dyeing: dyeing the degreasing grey cloth in a dye bath to obtain a dyed grey cloth; reduction cleaning: performing reduction cleaning on the dyed grey cloth to obtain a grey cloth treated by a dyeing process. The dyeing process of the present application can reduce the oil content of the grey cloth, reduce the influence of oil stains on the surface of the grey cloth on the coloring of the grey cloth, and effectively improve the problem of floating color and color stains after fabric dyeing.

The invention relates to the technical field of metal door and window cutting, in particular to a cutting device for metal door and window manufacturing, which comprises a base, the top of the base is fixedly connected with a mounting table, the top of the mounting table is fixedly connected with a rotating part, the rotating part is rotatably connected with a machine body, one side of the machine body is rotatably connected with a blade, and the blade is fixedly connected with the mounting table. A protective cover is fixedly connected to one side of the machine body and located on the outer side of the blade, and a handle is fixedly connected to one side of the machine body. The top of the placing plate is used for placing a metal part needing to be cut; the metal parts are placed on the placing plate, the sliding plates on the two sides are driven by the hydraulic oil cylinder to clamp the metal parts, the metal parts are stably clamped, deviation or shaking is avoided during cutting, cutting precision is improved, defective products are reduced, cost is saved, manpower is not needed, and potential safety hazards are reduced.

The application discloses a dry powder artistic micro-cement without efflorescence and a preparation method thereof, and belongs to the technical field of artistic cement preparation.The dry powder artistic micro-cement without efflorescence disclosed by the application comprises the following raw materials in parts by weight: white cement 25-60 parts, artistic sand 25-50 parts, latex powder 3-8 parts, cellulose 0.2-0.8 parts, dispersing agent 0.2-0.5 parts, wetting agent 0.1-0.5 parts, defoaming agent 0.1-0.6 parts, water reducing agent 0.1-0.5 parts and wood fiber 0.2-1 part.The dispersing agent, the wetting agent and the like used in the application have special effects;after the dry powder artistic micro-cement is prepared by using a reasonable ratio, the efflorescence resistance of the micro-cement can be improved, and the artistic beauty of the artistic micro-cement, i.e., the artistic beauty of light and uneven color, can be more fully displayed.

The present application relates to a cap assembly, a cylindrical secondary battery including the same, and a method of manufacturing a cylindrical secondary battery including the same.

The edge and head cutting die comprises a bottom plate, a heat shield body and a top plate installed above the bottom plate, an installation opening is fixedly connected to the middle of the top of the top plate, guide columns are fixedly connected to the periphery of the top of the bottom plate, and a limiting ring is fixedly connected to the bottom of the top plate. One side of the top of the bottom plate is fixedly connected with an edge cutting part mold, the other side of the top of the bottom plate is fixedly connected with a head cutting part mold, one side of the bottom of the top plate is fixedly connected with a fixing plate, a sliding rod is slidably connected to the interior of the fixing plate, and the end, away from the fixing plate, of the sliding rod is fixedly connected with a left pressing plate; the edge cutting device solves the problems that according to an existing edge cutting part die, one cavity and one die are generally adopted, so that edge material and head material cutting can be completed only by two sets of dies and two oil presses actually, the machining cost is increased, and the production efficiency is reduced.

The invention provides a database operation statement optimization method and a related product. The method comprises the following steps: acquiring a database operation statement; judging whether the database operation statement contains a deduplication property and an aggregation function or not; if yes, obtaining an aggregation function, and determining a calculation type of the aggregation function; and under the condition that the reference content in the aggregation function is a constant, performing corresponding replacement operation on the database operation statement according to the calculation type so as to delete the aggregation function. Through the method, the occurrence of Aggregate execution nodes can be reduced by deleting the aggregated functions meeting the conditions, so that the aggregated functions in the database operation statements meeting the conditions are optimized, and the query efficiency is improved.