16results about How to "Reduce margin" patented technology

The invention discloses a carburizing and quenching process of a thin-wall gear and a clamping tool of the thin-wall gear. The carburizing and quenching process comprises process parameters of temperature, time, flow, carbon potential, cooling speed and the like in stages of pre-cleaning, pre-oxidation, preheating, strong carburizing, diffusion, cooling, quenching, tempering and the like. It needs to be explained that in the technical process, the purpose of reducing the heat treatment deformation quantity of the thin-wall gear is achieved by optimizing the hanging and clamping mode of the thin-wall gear and improving the temperature and time parameters during carburizing and quenching in the scheme. Besides, a clamping tool suitable for the process is designed in the scheme, so that the clamping stability of the thin-wall gear during carburizing and quenching treatment is improved, and the heat treatment deformation quantity of the thin-wall gear is further reduced.

The invention relates to the technical field of fretsaw cutting, in particular to a cutting fretsaw for aluminum profile machining, which comprises a fretsaw frame and a fretsaw wire, and the fretsaw frame is connected with the fretsaw wire to drive the fretsaw wire to axially move; a supporting beam is horizontally and fixedly connected to one side of the fretsaw rack, a workbench used for bearing a workpiece is fixedly connected to the supporting beam, and a notch is formed in the workbench and used for allowing a fretsaw wire to pass through. According to the cutting fretsaw for aluminum profile machining, when a workpiece is cut, the connecting piece slides on the vertical plate to drive the two mounting plates to clamp the workpiece, in the process that the workpiece is cut through the fretsaw wire, radial supporting force is applied to the fretsaw wire through the two pinch rollers arranged on the mounting plates, and the workpiece is cut through the fretsaw wire. Therefore, the bending degree of the fretsaw wire in the cutting process is reduced, the fretsaw wire is kept in a linear state as much as possible, extra allowance generated in the squaring process of an aluminum profile workpiece is reduced, and the production cost is reduced.

The utility model provides an ink box and ink jet printing equipment, the ink box comprises a container, a sealing head, a sealing plug, leakproof cotton and a chip, the container is provided with an ink storage cavity and an ink outlet, the container comprises a main body and a cover body, the ink storage cavity and the ink outlet are both formed on the main body, an opening of the ink storage cavity is formed on a side wall of the main body, and the cover body is arranged on the main body. The ink outlet is located in the bottom wall of the main body and communicated with the ink storage cavity, the cover body covers the opening and is connected with the main body in a sealed mode, an ink adding opening communicated with the ink storage cavity is further formed in the main body, the sealing head is installed in the ink outlet and can be communicated with the ink storage cavity, the sealing plug is detachably installed in the ink adding opening, and the leakage-proof cotton is installed on the bottom wall. One part of the leakage-proof cotton is arranged in the circumferential direction of the ink outlet in a surrounding mode, and the chip is installed on the container. The ink-jet printing equipment is provided with the ink box, and the ink box has the advantages of being simple in structure, large in capacity and capable of being repeatedly used.

A control device controlling allocation of resources in a radio access network includes: a resource usage rate acquiring unit configured to acquire a resource usage rate for each service; a total received data volume information acquiring unit configured to acquire total received data volume information indicating a total received data volume for each service received by user equipment via an interface with a base station; a total traffic volume information acquiring unit configured to acquire total traffic volume information indicating a total traffic volume for each service for the user equipment in the base station via the interface with the base station; a communication quality degradation degree calculating unit configured to calculate a degree of degradation of communication quality indicating a degree of degradation of a throughput based on a ratio of the total received data volume to the total traffic volume for each service; and a control unit configured to control a margin for a requested amount of resources on the basis of the resource usage rate and the degree of degradation of communication quality in the past for each service.

This invention provides a method and system for extracting front-end power from a high-bypass turbofan engine, including a low-pressure rotor front-end power extraction subsystem and a support structure. The support structure includes a coaxial outer casing and an inner casing. The outer casing is connected to a fan casing. The front end of the inner casing is connected to the outer casing via a load-bearing support plate. The rear end of the inner casing overlaps with the low-pressure rotor blade disk, and the generator is assembled in the inner cavity of the front end of the inner casing. The method includes a front-end power extraction method design step and a front-end power extraction system design step. The front-end power extraction method design step includes: the extraction and allocation of high-pressure rotor front-end power and low-pressure rotor front-end power. The method and system designed in this invention extract low-pressure rotor power through a front-end power extraction method, ensuring the power demand of the aero-engine while guaranteeing compressor margin, filling a gap in the industry and having significant guiding significance.

The utility model provides a forging die device for a wedge-shaped sealing pressing plate of a wind driven generator, and belongs to the technical field of wind driven generators. Comprising an upper die assembly connected with an upper sliding block of a press machine and a lower die assembly connected with a lower working table top of the press machine. The lower die assembly comprises a lower die, a bent cavity and a finish forging cavity which are formed in the top face of the lower die, and a bridge part arranged on the edge of the finish forging cavity. Through the arrangement of the bending cavity, a blank with qualified heating temperature can be put into the bending cavity, and then the blank is bent through a press machine to prepare a bent blank; by arranging the finish forging cavity, a bent blank can be placed in the finish forging cavity, and then the blank is forged through a press machine to form a product; and by arranging the bridge part, metal can be prevented from leaking out in the forging process, and it is guaranteed that all parts of the finish forging cavity are full. According to the die forging die device, the forming allowance is small, raw material consumption and working hours needed by machining can be reduced to a great extent, and the requirement for large-batch production is met.

The invention relates to the technical field of tungsten recovery, in particular to a method for recovering tungsten and ammonia from ammonium tungstate feed liquid sulfuration impurity removal slag. The method comprises the following steps: (1) adding a stripping tower discharge material liquid into the sulfuration impurity removal slag for size mixing to obtain a size mixing material liquid, the temperature of the stripping tower discharge material liquid is more than 80 DEG C, the alkalinity is 4-5g / l, and the ammonia nitrogen content is less than or equal to 10ppm; (2) adding alkali into the slurry mixing liquid at a preset temperature, and maintaining the alkalinity of the solution within a first range to obtain a solid-liquid mixture; (3) filtering the solid-liquid mixture to obtain primary filtrate and primary filter residues, and performing steam stripping deamination on the primary filtrate; (4) adding an acid solution into the primary filter residue and maintaining the acidity of the solution within a second range to obtain a dissolved solution; and (5) adsorbing the dissolved solution by using anion resin, and analyzing to obtain the tungsten recovery solution. By adopting the method provided by the invention, the tungsten recovery rate can be improved, the process is few, and the consumption of steam and caustic soda flakes is greatly reduced; the amount of slag after acid treatment is small, and secondary slag treatment is reduced; and the cost effect is obviously reduced.

The invention provides automatic wire feeding and shearing plastic welding equipment, and belongs to the technical field of hot air type plastic welding. A welding rod is conveyed into a conveying pipe of a welding gun device through a pressure wire feeding device, and a wire shearing device is arranged between the conveying pipe and the output end of the pressure wire feeding device; the wire shearing device shears the welding rod conveyed to the conveying pipe before welding of the welding gun device is completed, and welding is completed. The conveying pipe is parallel to the axis of the welding gun, so that the welding rod enters the conveying pipe in the vertical direction, the wire shearing device is arranged above the conveying pipe, and the shearing head is perpendicular to the conveying pipe, so that a notch of the shearing head in the welding rod can be perpendicular to the welding rod, the plastic welding quality is improved, the head and the tail of a welding seam are welded and closed, and better alignment can be achieved; and the phenomenon of gaps or overlapping during welding is reduced. The pressure wire feeding device and the wire shearing device are located on the side of the welding gun device so that the shearing device can be close to the welding gun device, the welding rod allowance after wire shearing can be reduced, and welding of short welding seams can be achieved easily.

The electromagnetic valve seat machining method based on electric heating upsetting comprises the following steps that firstly, a cylindrical bar is selected, electric heating upsetting is adopted to conduct staged machining on the cylindrical bar in a staged mode, an intermediate structural part is obtained, the intermediate structural part comprises a rod part, a garlic-shaped protruding part is arranged at one end of the rod part, and the size of the protruding part is larger than that of the rod part; 2, the heated middle structural part is placed in a die to be forged and formed, a blank is obtained, the protruding part comprises a counter bore, and the counter bore is located in the extending direction of the rod part; 3, the blank is subjected to magnetic property annealing, and magnetic property annealing is conducted; and 4, the blank is subjected to turning finish machining, and a finished electromagnetic valve seat is obtained. According to the method, blank materials can be utilized to a great extent, consumables are reduced, the allowance is small, and therefore compared with a traditional machining mode, the machining time is shorter, the material utilization rate is high, and better microstructure streamlines and compact grain size are achieved.

The application provides a method and device for determining equipment parameters of a high-voltage direct-current power transmission system and a storage medium. The method comprises: obtaining a voltage fluctuation limit value used to indicate an AC filter switching state of the high-voltage direct-current power transmission system; calculating a first product between the voltage fluctuation limit value and a first coefficient set in advance to obtain a voltage fluctuation coefficient, wherein the voltage fluctuation coefficient is not greater than the voltage fluctuation limit value; determining a group capacity of a reactive power compensation device in the high-voltage direct-current power transmission system based on the voltage fluctuation coefficient; calculating a second product between the voltage fluctuation limit value and a second coefficient set in advance to obtain a tap distance of a converter transformer in the high-voltage direct-current power transmission system; and determining a trigger angle interval of a converter valve in the high-voltage direct-current power transmission system according to the tap distance and a highest gear position of the converter transformer. The application can reduce the overall margin of the high-voltage direct-current power transmission system to reduce the power transmission cost.

This invention belongs to the field of advanced metallic materials and powder metallurgy technology, specifically relating to a low-cost, multi-scale twinned synergistic deformation superplastic medium-heavy alloy and its preparation method. The preparation method includes melting the medium-heavy alloy using vacuum induction melting technology, then casting the molten medium-heavy alloy into an ingot and machining electrodes; preparing the electrodes into powder of a predetermined particle size; loading the powder into a casing, and after compaction, heating and degassing the casing until the required vacuum level is met, followed by sealing the casing; hot isostatic pressing of the sealed casing, and finally machining to remove the casing, yielding the superplastic medium-heavy alloy material. The superplastic medium-heavy alloy material prepared by this invention possesses multi-scale twins and an FCC matrix, with the FCC matrix accounting for more than 95% of the alloy, both ensuring good plasticity of the medium-heavy alloy material.

The invention relates to the field of robot spraying processing, in particular to an integrated spraying system which comprises a robot, a pipeline mechanism and a flow dividing control mechanism connected to the tail end of the robot, the flow dividing control mechanism comprises a top plate, a valve control plate, a first flow dividing plate, a second flow dividing plate and a bottom plate which are sequentially arranged from top to bottom, and the top plate is connected with the tail end of the robot; a release agent valve is arranged in the valve control plate, a release agent inlet is formed in the valve control plate, the release agent inlet is communicated with a feeding port of the release agent valve, a discharging port of the release agent valve is communicated with a release agent outlet in the valve control plate, and the release agent outlet is sequentially communicated with the first splitter plate and the second splitter plate. The device can be suitable for a large mold, pipeline abrasion is reduced, large-flow blow-dry gas can be guaranteed while the size is reduced and the load of a robot is reduced, and the spray head is convenient to maintain.

The invention provides a process corner extraction method and device, electronic equipment and a storage medium, and relates to the technical field of semiconductors. The process corner extraction method of the metal interconnection line comprises the steps that in response to an input initial RC process corner file of a chip circuit, a process corner extraction model is configured, a target RC process corner is output through the process corner extraction model, and the process allowance of the target RC process corner is smaller than the process allowance in the initial RC process corner file; wherein simulation operation of circuit performance is executed on the chip circuit based on the initial RC process corner file, so that the process corner extraction model is configured based on a result of the simulation operation. Through the technical scheme of the invention, the target RC process corner parameter with smaller allowance and higher precision can be obtained, so that the influence of parasitic resistance and capacitance on the performance of a device can be reduced when the back-end process of a chip is guided based on the target RC process corner parameter.

The application discloses a tool for machining a rotation-stopping structure on a rotary part, and belongs to the technical field of pin machining in connectors. The tool solves the problems of complicated operation and high cost in machining the rotation-stopping structure on the part in the prior art. The tool comprises an upper die assembly, a lower die assembly, extrusion forming parts and positioning blocks. The lower die assembly is internally movably provided with two extrusion forming parts. The two extrusion forming parts are provided with the positioning blocks therebetween, the positioning blocks are provided with part positioning holes in the centers, and the parts to be machined are fixed in the part positioning holes. The upper die assembly drives the two extrusion forming parts to approach each other, and the two extrusion forming parts machine the limiting portions on the parts. In the application, the two extrusion forming parts are used to extrude the parts on both sides to machine the limiting portions on the parts. Compared with the existing rotation-stopping structure, the tool does not need to add steps on the outer circles of the parts and machine symmetrical flat positions, the machining efficiency and material utilization are improved, the machining cost is reduced, the turning allowance is reduced, and the quality of the parts is ensured.

The invention discloses a numerical control gear grinding machine for high-precision gear machining, and relates to the technical field of numerical control gear grinding machines, the numerical control gear grinding machine for high-precision gear machining comprises a workbench, a gear connecting seat, a grading grinding mechanism, a feeding mechanism, a linear reciprocating driving part and the like, the lifting plate controls rack position switching through a micro motor, a second turbine worm self-locking speed reducer and a screw rod; in the aspect of high-precision graded grinding, through unique design, rough, medium and accurate grinding processes of tooth grooves are achieved, the grinding amount and precision are precisely controlled, the size, shape precision and surface roughness of the tooth grooves are improved, the tooth surface waviness and tooth profile errors are reduced, the gear transmission stability is enhanced, vibration noise is reduced, and the service life is prolonged; the racks are switched and matched efficiently, multiple procedures are completed on the same equipment, the carrying and clamping frequency is reduced, and the machining efficiency and precision are stabilized.

A display device is disclosed. The display device includes: a substrate including a display area and a non-display area surrounding the display area; a transistor located on the substrate; an insulating layer located on the transistor; a power supply voltage line located on the insulating layer and transmitting a power supply voltage; a data line located on the insulating layer and transmitting a data voltage; and auxiliary wiring located in the display area between the substrate and the power supply voltage line. The auxiliary wiring includes portions overlapping the power supply voltage line and portions overlapping the data line, and is electrically connected to the power supply voltage line.