400results about How to "Improve working precision" patented technology

The invention relates to the technical field of mechanical arm control, in particular to a mechanical arm and a control method thereof. The method comprises the following steps that real-time load information of all joints of the mechanical arm in the operation process is obtained, the acceleration and rotational inertia of the mechanical arm are monitored in real time, and real-time inertia force data are generated; the torque compensation amount needed by the mechanical arm is calculated according to the real-time inertia force data, and torque compensation control data are generated; performing dynamic analysis on the torque compensation control data, and performing real-time adjustment on the output torque of the servo motor based on the current load and inertia change condition to generate inertia compensation data; and the motion path and the motion speed of the mechanical arm are dynamically optimized according to the inertia compensation data, and path optimization data are obtained. Through real-time monitoring, dynamic adjustment and intelligent optimization, the operation precision, the movement efficiency, the stability and the self-adaptive capacity of the mechanical arm in the complex working environment are remarkably improved.

The utility model discloses a double-opening concrete blank turnover machine, and belongs to the field of concrete product production equipment. The turnover machine comprises a base, wherein a support is arranged on the base; the first overturning assembly is connected with the support in a hinged mode, and the first overturning driving piece is arranged on the base and drives the first overturning assembly to rotate; the second overturning assembly is connected with the support or the first overturning assembly in a hinged mode, and the second overturning driving piece is arranged on the base and drives the second overturning assembly to rotate; and the locking device is connected with the first turnover assembly and the second turnover assembly when the first turnover assembly and the second turnover assembly intersect at 90 degrees. Feeding and discharging work on the two sides of the upender can be carried out at the same time, and the working efficiency of the upender is effectively improved.

The invention discloses a cultivated land interplanting forest identification method combining mixed pixel decomposition and deep learning. The method comprises the following steps: generating basic classification data by processing remote sensing image data; on the basis of historical monitoring data and classification standards, cultivated land interplanting forest sample labels are established, and a standardized sample set is constructed; calculating end member abundance and a cross end member contribution ratio by using a mixed pixel decomposition technology, and completing preliminary classification in combination with a region area; designing a deep learning network architecture, and performing model training and optimization by using a multi-scale and direction feature extraction technology; automatically extracting spectrum, texture and spatial features through the model, and fusing to generate a classification result; and performing performance evaluation on the model by adopting a verification set and a test set, and optimizing classification parameters. According to the invention, accurate classification and identification of cultivated land interplanting forest ground feature targets are realized.

The invention relates to the field of drilling machine rod replacing, in particular to an automatic rod replacing device of a mining directional drilling machine. Comprising a base, a sliding rail is installed on the base, a drill bit driving mechanism and a drill rod clamping mechanism are installed on the sliding rail, the sliding rods are fixedly connected to the left side and the right side of the base, sliding supports are symmetrically connected to the sliding rods in a sliding mode, and a first spring is connected between the front sliding support and the rear sliding support. The position of the limiting frame is adjusted through the lead screw, then the position of the sliding support is adjusted, the clamping unit can adapt to drill rods of different lengths, the drill bit driving mechanism can push the sliding support when moving, the suspended part of the drill rod is shortened when the drill rod works, the stability and working precision of the drill rod during working are improved, the situation of drilling eccentricity is avoided, and the drilling efficiency is improved. And the clamping unit extrudes the drill rod through the drill bit driving mechanism, the position of the drill rod can be adjusted in real time in the front-back direction, the drill rod is prevented from being knocked and deformed, and the service life of the drill rod is prolonged.

The present invention discloses a measurement payment method and system based on a BIM model, the method comprising: obtaining a bill of quantities output by a detailed design model; screening out target components that meet preset measurement and pricing conditions from the bill of quantities; extracting price information of the target components from the contract list; matching preset measurement and pricing rules according to the cost attributes of the target components, and generating a payment slip corresponding to the bill of quantities in combination with the price information. The present invention provides a measurement payment method and system based on a BIM model, by establishing a high-precision and high-standard BIM model, applying the BIM model to the bill of quantities calculation, and by extracting the attribute information of the model components, realizing the automatic matching association between the model components and the bill of quantities, which can not only save the calculation time and reduce repeated calculations, but also improve the work efficiency and accuracy of the measurement and pricing stage after quality inspection and evaluation, realize more accurate cost calculation in a three-dimensional model, and reduce the workload of cost personnel.

The utility model relates to the technical field of food processing equipment, and discloses an automatic sheet jelly production device which comprises a rack, and a conveying mechanism, a discharging device, a cooking box and a cooling pond are arranged on the rack; the conveying mechanism comprises a first conveying device and a second conveying device which are arranged in parallel and opposite in conveying direction, a plurality of partition plates distributed at equal intervals are arranged on the peripheral side of the first conveying device, and an upper mold assembly is arranged at the output end of the second conveying device and used for pushing a mold to the first conveying device; the discharging device is arranged above the first conveying device, the output end of the first conveying device is connected to an inlet of the cooking box, the cooling pools are arranged on one side of the cooking box in parallel, one ends of the cooling pools are connected with an outlet of the cooking box, and the other ends of the cooling pools are connected to the input end of the second conveying device. The closed sheet jelly automatic production line is formed by the conveying mechanism, the discharging device, the cooking box and the cooling pond, recycling of the mold is achieved, and the production efficiency is improved.

The invention relates to the technical field of visual identification and detection of polishing robots, in particular to a multi-type polishing area detection algorithm for casting autonomous polishing. Comprising the following steps of S1, process type classification, S2, defect type classification, S3, bulge type defect detection, S4, crator defect detection, S5, rough surface defect detection and S6, point-by-point grinding process detection. According to a grinding target area detection algorithm provided by the invention, a position sensing basis is provided for grinding track planning by classifying grinding areas; different detection algorithm libraries are formed and deployed in a system of the grinding robot, the adaptability to detection of the to-be-ground area can be enhanced, and the working capacity of the grinding robot is improved.

The invention relates to a mechanical arm control system for spline injection molding, which is characterized in that mechanical arm working data, including position information of each joint and an end effector of a mechanical arm, acting force of the mechanical arm and appearance images of injection molding spline products, in historical periods are acquired in batches; training a random forest model by taking the position information of the mechanical arm and the acting force of the mechanical arm as input variables and taking the corresponding working link as an output label; the trained random forest model is used for judging the working link of the current mechanical arm; according to the working link of the current mechanical arm, the next working link is determined in combination with the detection result of the machine vision model on the appearance image of the spline product; and finally, a control instruction is generated according to the next working link information, and the motion state of the mechanical arm is controlled. The problem that in the prior art, it is difficult to determine the next working link according to the working data of the mechanical arm, and consequently spline injection molding control is inaccurate is solved.

The invention provides a traction device and a control method.The traction device comprises a support, a sliding assembly, a linear motor and a clamping mechanism, the support is arranged on a traction plane, the sliding assembly is limited to move in the direction parallel to the traction plane, the traction end of the linear motor is connected with the sliding assembly, and the sliding assembly is dragged through controlled movement of the traction end; therefore, the clamping mechanism and the clamped tool move along with the sliding assembly. According to the traction device, due to the fact that the linear motor is matched with the sliding assembly, the problems that a traditional driving mode is insufficient in load capacity and limited in power output are solved, the limiting moving direction of the sliding assembly ensures that the tool is stable, further, the clamping mechanism ensures that the tool does not generate displacement or positioning errors in the clamping state, and by means of the technical means, the machining efficiency is improved. The problems that an existing traction device is insufficient in load, low in efficiency, poor in stability and inaccurate in tool positioning in the heavy tool traction process are effectively solved.

The invention relates to the technical field of forest resource survey, and discloses an adjustable mounting bracket for a forest resource survey instrument, which comprises a supporting sleeve rod, a height adjusting screw rod is slidably connected in the supporting sleeve rod, a mounting mechanism is fixedly mounted at the upper end of the height adjusting screw rod, and a driving mechanism is arranged at the upper part in the supporting sleeve rod. And the driving mechanism is in threaded connection with the height adjusting screw rod, a positioning mechanism is detachably mounted on the lower portion of the outer surface of the supporting sleeve rod through three mounting screw holes, and a marking mechanism is detachably mounted at the lower end of the supporting sleeve rod through four clamping holes. According to the adjustable mounting bracket for the forest resource survey instrument, various functions such as height adjustment, equipment fixing, marking and protection are integrated, various requirements in forest resource survey can be met, the comprehensive performance and practicability of equipment are improved, and in addition, the adjustable mounting bracket is convenient to use. And the modular design also allows the user to replace or upgrade specific parts according to specific requirements, so that the service life of the equipment is prolonged, and the maintenance cost is reduced.

The utility model relates to the technical field of chip processing, and provides a transfer positioning clamp for chip production, which comprises an outer frame and is characterized in that adjusting grooves are arranged on the inner sides of a front frame and a rear frame in the outer frame, and a positioning mechanism is mounted between the interiors of the adjusting grooves on two sides. A partition plate and a negative pressure exhaust hood are further arranged at the bottom of the outer frame. By means of the positioning mechanism arranged inside, position adjustment and positioning operation of chips of different models can be achieved, follow-up operation of taking the chips by a mechanical arm is more convenient, the working precision is effectively improved, meanwhile, a negative-pressure air exhaust cover is further arranged inside, and the negative-pressure air exhaust cover is matched with an external air exhaust assembly, so that negative-pressure adsorption operation of the chips can be achieved, and the working efficiency is improved. The stability of the chip in the transferring process can be further improved.

The invention relates to the technical field of operation machinery, and discloses a crane. The crane comprises a traveling driving system which comprises a driving motor and a traveling mechanism, and the driving motor is connected with the traveling mechanism; the fuel cell system comprises a cell stack, a hydrogen supply mechanism and an air supply mechanism, and the cell stack is connected with the hydrogen supply mechanism and the air supply mechanism; the operation system comprises a winch motor, a winch box, a rotation assembly, a rotation motor, an oil pump motor and an operation hydraulic assembly, the winch motor is connected with the winch box, the rotation motor is connected with the rotation assembly, and the oil pump motor is connected with the operation hydraulic assembly; and the control system is electrically connected with the traveling driving system, the fuel cell system and the operation system. The fuel cell system serves as a power source to provide power for the crane, water and heat are mainly generated in the operation process of a fuel cell, harmful tail gas emission is avoided, fuel can be rapidly supplemented through a hydrogen refueling station, and zero emission, high efficiency and high energy supplementing speed are achieved.

The utility model discloses a steel jacket feeding device which comprises a horizontally-arranged working table, a steel jacket carrying device, a press fitting jig and a press fitting device, the steel jacket carrying device, the press fitting jig and the press fitting device are arranged on the working table, and the steel jacket carrying device comprises a portal frame fixed to the working table and a steel jacket clamp moving in a reciprocating mode through a carrying air cylinder. The press-fitting jig comprises a mounting jig sliding on the workbench, and the press-fitting device comprises a supporting frame fixed to the workbench, a pressure device arranged at the top end of the supporting frame and a press-fitting frame connected to the pressure device in a driving mode. The automatic feeding and press-fitting device is compact in structure and used for automatic feeding and press-fitting of rotor steel jackets, and the working efficiency and precision are improved.

The present invention relates to the field of gear burr grinding and processing equipment, and in particular to a universal gear processing equipment, including a grinding power chassis, and also including a clamping mechanism rotatably connected to the grinding power chassis, the clamping mechanism including a chuck, the peripheral wall of the chuck is provided with an oil hole one along its radial direction, and the oil hole one is distributed in a pair along the axial direction of the chuck. The clamping mechanism of the universal gear processing equipment combines the advantages of existing pneumatic chucks and hydraulic chucks. The driving part of the device can make full use of the working characteristics of compressed gas through the design of cover plate 2, airbag and adapter plate, provide reliable and convenient initial pressure for the chuck, and further amplify the thrust on the clamping claw through a very compact jack structure composed of a piston rod and a bearing piston, so as to achieve reliable clamping performance. The clamping mechanism realizes the convenience and quick action of pneumatic operation, and also realizes the high clamping force of hydraulic drive.

The utility model discloses a servo motor with a multi-structure vibration damping function, and particularly relates to the technical field of servo motors, the servo motor comprises a servo motor body, a vibration damping protection mechanism is arranged on the outer side of the servo motor body, the vibration damping protection mechanism comprises a protection shell, the protection shell is arranged on the outer side of the servo motor body, and threaded holes are formed in the surfaces of the two sides of the protection shell. And threaded rods are in threaded connection in the threaded holes. According to the utility model, through the arrangement of the vibration reduction protection mechanism, and through various structures and modes of the damping plate, the rubber plate, the polymer buffer pad and air compression, the vibration of the motor is buffered and reduced from different layers and angles, the vibration reduction effect is greatly improved, the influence of vibration on the motor and peripheral equipment can be effectively reduced, and the service life of the motor is prolonged. The motor is clamped and fixed conveniently, the stability of the motor is guaranteed, displacement or instability caused by vibration is reduced, the vibration reduction effect is improved, and normal operation and working precision of the motor are facilitated.

The utility model provides a full-function side plate forming machine. The full-function side plate forming machine comprises a machine frame, a bottom face machining mechanism, a forming mechanism, a side face machining mechanism and an end machining mechanism, the bottom face machining mechanism comprises a bottom face machining driving part and at least two sets of bottom face machining assemblies. The forming mechanism comprises a forming wheel set, a guide wheel set and a forming driving part. The side face machining mechanism comprises a side face machining assembly and a side face machining driving part. The end machining mechanism comprises an end machining driving piece and at least two end machining assemblies. The bottom face machining mechanism, the side face machining mechanism and the end machining mechanism are arranged, a plurality of machining structures can be formed on the side plate, the machining structures can be freely combined, then cutters or cutting blocks in the machining mechanisms are replaced or taken out, and machining efficiency is improved. Side plate products with multiple specifications, multiple shapes and multiple machining structures can be machined, use is convenient, the production efficiency is improved, and the production cost is reduced.

The invention belongs to the technical field of coal mines, discloses a method and a system for determining key pressure injection parameters of liquid CO2 for preventing oxidation of residual coal in a goaf, and aims at taking a coal mine as a research object, and obtaining comprehensive basic data by measuring the inclination length and mining height of a working face and the air distribution amount of the working face in detail. Meanwhile, the oxygen concentrations of different burial depths of the air inlet side of the working face in the test area are measured, and the pressure injection amount of the liquid CO2 and the inhibition effect of the liquid CO2 on coal seam oxidation can be analyzed more accurately in combination with oxygen concentration distribution in the actual coal mine environment. By analyzing the pressure injection period of the liquid CO2, the oxidation reaction of the residual coal is effectively controlled on the premise of not influencing the normal coal mine production. The method not only can be used for fire extinguishing and oxidation control under emergency conditions, but also can use a liquid CO2 injection technology as a daily prevention and control measure, so that the efficiency of coal mine safety production is improved, the risk of fire caused by oxidation is reduced, and the method has a wide industrial application prospect.

The invention discloses a fixing and placing device for electromechanical equipment, and relates to the technical field of fixing and placing, the fixing and placing device for the electromechanical equipment further comprises a clamping device, a machining table is fixedly installed on the surface of a workbench, and machining equipment is fixedly installed on the surface of the workbench; a motor is fixedly installed at the bottom of the workbench, and the clamping device comprises a linkage plate, a first connecting rod, a linkage rod, a second connecting rod, a sliding box, an electric push rod, a triangular rod, a first clamping plate, a first fixing rod, a telescopic sliding rod, a second clamping plate, a second fixing rod and a pulley. And therefore, the materials are effectively prevented from deviating or shaking in the machining process, the working precision of the equipment is effectively improved, meanwhile, abrasion of the equipment in the using process is reduced, and the service life of the equipment is prolonged.

The utility model discloses a wood floor slotting and cutting device convenient to collect sweeps, which belongs to the technical field of wood floor processing and comprises a case, a partition plate is fixedly mounted in the case, a cavity positioned above the partition plate in the case is an operation cavity, a cavity positioned below the partition plate in the case is a collection cavity, a plurality of material leakage holes are formed in the partition plate, and a plurality of material leakage holes are formed in the collection cavity. A collecting frame is slidably mounted in the collecting cavity; by arranging the fan, when the fan is started, air and chippings are sucked through the plurality of material leakage holes, the air and the chippings enter the collecting cavity and are filtered through the filter screen, the chippings are left on the surface of the filter screen after being filtered, the air is input into the case through the fan and then discharged through the plurality of air blowing nozzles, and the function of blowing off the residual chippings on the surface of the wood floor is achieved. And the functions of blowing off residual chips on the surface during grooving and subsequent recycling are achieved, the problem that the machining precision is affected by residual chips is solved, and meanwhile the threat to the health and safety of operators caused by splashing of the chips is avoided.

The invention discloses a potting type high-precision sine and cosine rotary transformer and a processing method, and relates to the field of sine and cosine rotary transformer processing applied to an extreme environment, and the processing method comprises the following steps: potting and curing a rotor, and potting a part on the outer side of a rotor bracket with a potting material to obtain a rotor potting piece; potting and curing the stator, and potting the inner side part of the primary side iron core of the annular transformer by a potting material to obtain a stator potting piece; and grinding the outer circular surface of the rotor potting piece, and grinding the inner circular surface of the stator potting piece. And the rotary transformer functional parts are all tightly packaged, so that the working field of the rotary transformer is greatly widened, the capability of the rotary transformer for resisting severe environments such as hydraulic oil, moisture and mould is improved, and the explosion-proof reliability is improved.

The invention relates to an establishment method and application of a soybean NLRs disease-resistant gene rapid identification system. The establishment method comprises the following steps: constructing an expression vector with pathogenic microorganism effect protein and an expression vector carrying soybean candidate NLRs disease-resistant genes; respectively adding into an agrobacterium GV3101 strain, and carrying out electrotransformation to obtain two carrier bacterial liquids; a pathogen effector and an NLRs anti-disease gene from soybean are simultaneously expressed in two-week-old cowpea pair cotyledons through an agrobacterium-mediated transient expression system, and after the cowpea pair cotyledons are placed at 22 DEG C for 5 days, the allergic necrosis phenotype on the leaves is observed to judge whether the NLRs are key anti-disease genes for identifying corresponding pathogenic microorganism effector proteins or not. According to the invention, cowpea is compatible with more soybean NLRs disease-resistant genes capable of identifying pathogenic microorganisms through indirect regulatory factors, so that the cowpea is more suitable for high-throughput screening of the soybean NLRs disease-resistant genes, and the cloning time of the traditional soybean NLRs disease-resistant genes is greatly shortened; and an important technical system is provided for large-scale excavation of the soybean NLRs disease-resistant gene and subsequent soybean disease-resistant breeding.

The invention relates to the technical field of damping and buffering, and discloses a hydraulic cylinder with damping and buffering functions, which comprises a cylinder barrel, a first end cover is fixedly clamped to the left side of the cylinder barrel, a buffering mechanism is slidably connected to the left side of the first end cover, and a second end cover is fixedly clamped to the right side of the cylinder barrel. A piston centering mechanism is fixedly connected to the right side of the second end cover, a hydraulic force increasing mechanism is fixedly connected to the outer surface of the first end cover, a first piston is slidably connected to the inner surface of the cylinder barrel, a first sealing ring is clamped to the outer surface of the first piston, and a piston rod is fixedly connected to the right side of the first piston. The position of the piston can be automatically adjusted, the piston can be well matched with the cylinder barrel, friction and vibration are reduced, hydraulic oil can flow between the piston and the cylinder barrel more smoothly, the working efficiency and stability of the hydraulic cylinder are improved, and the piston centering mechanism can absorb and buffer influences caused by external impact and load changes and protect the hydraulic cylinder.

The invention relates to the technical field of battery lamination, in particular to lamination equipment of a soft package lithium battery, which comprises two diaphragm winding mechanisms suitable for winding and unwinding diaphragms; the positive electrode thermal compounding mechanism is positioned on one diaphragm winding mechanism, is arranged along the diaphragm feeding direction and is used for compounding a positive electrode plate and a diaphragm into a positive electrode semi-composite part; the positive electrode plate feeding mechanism is used for conveying a positive electrode plate to the positive electrode thermal compounding mechanism; the negative electrode thermal compounding mechanism is located on the other diaphragm winding mechanism and arranged in the diaphragm feeding direction, and a negative electrode piece and the diaphragm are compounded into a negative electrode semi-composite part; the negative electrode plate feeding mechanism is used for conveying a negative electrode plate to the negative electrode thermal compounding mechanism; the thermal laminating mechanism is used for laminating the positive electrode semi-composite part and the negative electrode semi-composite part to form a complete composite part; a pressure sensor is arranged in the hot laminating mechanism; the hot laminating mechanism is provided with a first dust sticking roller and a second dust sticking roller, a first static electricity eliminator is arranged beside the first dust sticking roller, and a second static electricity eliminator is arranged beside the second dust sticking roller.

The invention belongs to the technical field of robots, and discloses a decoupling control method and system for a two-degree-of-freedom vibration suppressor of a robot, and the method comprises the steps: analyzing the structural characteristics of a robot system, and designing a decoupling control strategy through a structural invariance principle; coupled vibration of force applied in the X direction in the Y direction and coupled vibration of force applied in the Y direction in the X direction are effectively eliminated. Compared with a traditional vibration control method, the multi-degree-of-freedom vibration suppression method has the advantages that the influence of a pose related mode and a coupling mode of the robot is fully considered, multi-degree-of-freedom vibration suppression can be efficiently realized in real time in a complex load and dynamic environment, and the adaptability and the control precision are relatively high. The technology has wide application prospects in the fields of robot precision machining, assembling, carrying and the like, and the stability, precision and working efficiency of a robot system can be remarkably improved.

The utility model relates to the technical field of lentiviral vector preparation, in particular to a cell oscillating and shaking device which comprises a base, a box body is fixedly arranged on the upper side of the base, a supporting bottom plate is arranged in the box body, four corners of the supporting bottom plate are fixedly connected with the base through supporting assemblies, and the supporting bottom plate is provided with a carrying disc. Rubber rollers are arranged on the lower side of the supporting bottom plate at intervals and installed on the base through shaft seats, a driving motor is arranged on the left sides of the rubber rollers, multiple sets of first magnet strips are embedded in the surfaces of the rubber rollers, and second magnet strips are embedded in the supporting bottom plate. According to the magnetic oscillation principle, cells in the cell culture bottle can be uniformly oscillated, so that the uniformity and the consistency of cell treatment are improved, collision and physical damage possibly occurring in the manual shaking process are avoided, a milder and safer treatment environment is provided for the cells, the automation degree is high, and the operation is convenient. The physical burden of operators is greatly reduced, and the working efficiency and the accuracy are improved.

The utility model discloses a terminal crimping machine, and relates to the technical field of terminal crimping machines. According to the terminal crimping machine, the motor is controlled to work to drive the rotating disc to rotate, so that the transmission rod drives the moving seat to slide along the limiting groove, the first mounting seat is driven to slide along the sliding rod, the two crimping heads are driven to be close to each other, and when the rotating disc rotates by a half circle, the two crimping heads are in contact with a terminal to perform rapid crimping on the terminal; after the crimping is finished, the turntable continuously rotates for half a circle and then stops, so that the transmission rod drives the moving seat and the mounting seat I to reset, the next round of crimping is facilitated, two crimping heads are in contact with the terminal in the crimping process, and the shock absorber buffers and reduces the impact on the mounting seat I, so that the crimping stability is improved, and the production efficiency is improved. Meanwhile, the movable seat and a driving structure thereof are subjected to buffer protection, and the adjusting screw rod is driven to rotate by rotating the knob, so that the adjusting screw rod drives the mounting seat II to slide along the sliding rod, fine adjustment of the crimping distance is realized, and adaptation of different crimping heads and terminals is facilitated.

The invention discloses a wet electronic chemical separation and purification device, and particularly relates to the technical field of wet electronic chemicals, the wet electronic chemical separation and purification device comprises a transmission base, the top of the transmission base is fixedly connected with a storage bin, and the front and rear sides of the right side of the transmission base are fixedly connected with separation and purification seats respectively; by arranging the separation and purification base, the vertical plate, the push-pull plate, the filtering bin, the storage bin and the test tube rotary table, automatic and continuous treatment of raw materials is achieved, the raw materials can fully react in the purification treatment process through the design of the separation and purification base, the raw materials can be fully separated, and the raw materials can be fully purified. The purification efficiency and effect are improved, due to the structural design of a vertical plate and a push-pull plate, operation is more convenient, meanwhile, the safety of the equipment is guaranteed, and the problem that due to the fact that sodium sulfate and wet electronic chemicals cannot be well fused, the sodium sulfate and the wet electronic chemicals can be fused insufficiently, and the preliminary passivation effect is affected is solved.

The utility model relates to an oil filtering system for improving the precision of particulate matters in hydraulic oil, which comprises a hydraulic pump, a safety valve, a pressure gauge, a first ball valve, a second ball valve, a tubular one-way valve, a filter and an oil tank, one path is connected with the first ball valve and the tubular one-way valve and then connected into a system oil tank, and the other path is connected with the second ball valve and the filter and finally connected with the oil tank. According to the utility model, the particle precision grade of the hydraulic oil is ensured, the equipment failure of the hydraulic system is reduced, and the stability and the working precision of the hydraulic system are improved, so that the hydraulic oil reaches the NAS6-7 grade standard and can directly enter the top of a blast furnace or a TRT hydraulic system.

The utility model discloses high-precision mobile phone cover plate pressing equipment which comprises a rack and a pressing upper die, a driving device and a mounting seat are mounted in the rack, a lead screw is arranged in the mounting seat, the top of the lead screw is rotatably connected with a driven wheel, the driven wheel is rotatably connected with the driving device through a transmission belt, and the driving device is connected with the upper die. The lead screw is vertically arranged downwards, a lifting plate is connected to the bottom of the lead screw, a mounting frame is fixedly connected to the lower portion of the lifting plate, L-shaped supporting frames used for mounting an upper press-fit die are symmetrically arranged on the lower end face of the mounting frame, a lower press-fit die corresponding to the upper press-fit die is fixedly connected to the bottom of the rack, and at least one fixing screw is connected to the mounting frame in a threaded mode. At least one abutting column is arranged on the side, away from the fixing screw, of the mounting frame. According to the utility model, the movement of the press-fit upper die is limited from multiple directions through the support frame, the abutting column, the fixing screw and the pressing screw, so that the working stability and the press-fit precision of the press-fit upper die are improved.