25results about How to "Eliminate damage" patented technology

The invention relates to a 3D printing sand mold cleaning device which is characterized by comprising an automatic sand cleaning room, a roller shutter door arranged at an inlet of the sand cleaning room, an automatic transfer trolley used for bearing and transferring a sand mold, a sand cleaning mechanism, an air supply system and a control unit. The sand cleaning mechanism comprises a plurality of sand cleaning actuators and a driving mechanism used for driving the sand cleaning actuators to do linear movement independently. An automatic sensing device is arranged on each sand cleaning actuator and is used for detecting the distance between the automatic sensing device and the surface of the sand mold in real time in the moving process; the control unit is in signal connection with the driving mechanism, the automatic induction device and the air supply system. The invention further relates to a sand cleaning method for the 3D printing sand mold. According to the scheme, the problem that a traditional automatic sand cleaning device cannot treat sand molds with complex inner cavities, deep cavities or special-shaped structures can be solved.

The utility model provides a pressure sensor riveting device for pressure sensor's shell and base connection fixed, the one end of shell is connected with base, including the top post, drives linear movement through drive assembly, the lateral wall of base and shell junction is provided with the clamping hole, the top post is coaxial with clamping hole, the top post applies pressure to the outside surface of shell, makes shell form the convex block that protrudes inwards, the convex block is clamped with clamping hole. Adopt mechanical riveting to replace high accuracy laser welding, need not to depend on high power laser equipment and precision alignment system, significantly reduce equipment investment and process complexity, solved the problem that traditional full welding led, more fit the working condition characteristics of supermicro sensor low intensity demand.

The utility model discloses a gas treatment device after gas pressure protection and safety pressure relief of an excimer laser, which comprises a rupture disk device (1) with one end capable of being communicated with a resonant cavity of the excimer laser. The other end of the rupture disk device (1) is provided with a one-way safety valve (2) which can be jacked open by working gas leaked from the resonant cavity when a diaphragm (14) of the rupture disk device (1) is ruptured, and the one-way safety valve (2) is connected with an absorption device (3) which can purify the leaked working gas; and the absorption device (3) is provided with an exhaust port (4) capable of exhausting purified gas. According to the utility model, the structure is simple, external air can be prevented from flowing backwards into the excimer laser, the internal gas is kept pure, the discharged gas is absorbed and purified, so that the discharged gas can reach the emission standard, and the harm to workers and the environment is eliminated.

This invention discloses a method for protecting the bottom of trenches in wet etching using a photoresist partial filling process. The method includes: fabricating a trench structure on a predetermined area of ​​the wafer surface using plasma etching; applying photoresist to the entire trench structure and the entire wafer surface using spin coating; performing exposure and development on the entire surface of the wafer covered with photoresist using a photolithography machine without a photomask, thereby removing some of the photoresist on the upper surface of the wafer oxide layer and in the upper region of the trench structure, leaving the remaining photoresist in the trench area in a partially filled state; and removing the exposed oxide layer on the wafer surface, thus protecting the bottom of the trench from damage using the remaining photoresist in the trench area. This invention is applicable to both plasma etching and wet etching, effectively reducing the difficulty, cost, and time of etching processes, achieving low cost and a simple process. It is a novel method for eliminating damage to the bottom of deep trenches by using photoresist filling in deep trenches, suitable for wet etching.

The application relates to the technical field of robot control, and discloses a terminal position dynamic compensation method based on fusion of visual servoing and force feedback, which comprises the following steps: collecting a top view image, segmenting an irregular residual hole contour, and calculating a dynamic alignment center coordinate; then, a reverse conical spiral descending trajectory is generated in combination with a lateral force vector to guide a fiber tail fiber connector into a guide port; in the insertion stage, the curvature radius characteristic of a force-displacement curve resistance peak point is used to determine the authenticity of bottom touching; for the case that the bottom touching is determined to be false, the side projection chord length is used to deduce an under-insertion depth, and a high-frequency micro-oscillation compensation insertion is driven until a real buckle locking feature is captured; the application realizes accurate alignment and reliable positioning of fiber plug-in and plug-out actions under complex working conditions such as shielding and mechanical wear.

The invention discloses a mold pressing device and method for an optical lens, and belongs to the technical field of optical lens machining. An upper die, a lower die and a temperature control system; the roughness of the working surface of the upper mold is smaller than that of a target lens, and the lower mold is provided with vent holes arranged in an array; after the upper mold and the lower mold are attached, a circumferentially-closed mold pressing cavity is formed in the upper mold and the lower mold. The temperature control system is used for adjusting the temperature of the upper mold and the lower mold so as to indirectly control the temperature in the mold pressing cavity; the roughness of the working surface of the upper die is smaller than that of the target lens, a thermal forming mode is adopted to replace a traditional mechanical grinding machining mode, contact type mechanical friction does not exist in the whole forming process of lens machining, and an optical lens matched with the roughness of the working surface of the upper die can be formed; the introduction of microcracks, lattice damage and residual stress is fundamentally eliminated, the optical uniformity of the lens material is ensured, and the machining precision of the optical lens is effectively improved.

The utility model relates to a shell access live line protection circuit through AC sampling and auxiliary voltage comparison, include: alternating current wiring terminal, its access the alternating current single -phase commercial power, or, alternating current two -phase double -fire line commercial power, or, alternating current three -phase three -fire line commercial power, bridge rectifier circuit, crystal oscillator Y1, inductance coil T1A and relay KJ, and the pin of relay KJ accesses the shell, and the shell is not electrified through the control of relay. The utility model discloses when the customer terminal ground wire access live line, through the protection circuit control relay (normally open) disconnect the connection between the earth and the shell, eliminates the harm of shell electrification to human body.

The utility model discloses an insect capturing gun with high safety belongs to insect capturing tool technical field, including capturing gun main part, one end of capturing gun main part is provided with the gun mouth, has the clamping mechanism on installing the gun mouth, the gun mouth is clamped with extension assembly through the clamping mechanism, one end of extension assembly inserts into the gun mouth, the inner chamber of capturing gun main part is provided with negative pressure mechanism, and the extension assembly that the gun mouth is connected through the clamping mechanism, can effectively lengthen the distance between user and insect, make user more safe when capturing insect, especially suitable for capturing some insects that can have aggressiveness or make people uncomfortable, realize physical capture through negative pressure mechanism simultaneously, avoid the security risk that electric spark triggers, and need not use chemical reagent, completely eliminate the harm of chemical substance to human body and the pollution to air, greatly improve the safety and environmental protection in the use process.

The anti-falling air conditioner air outlet device comprises an air conditioner body, the front face of the air conditioner body is connected with a frame in a clamped mode, an air outlet channel is formed in the air conditioner body, the front face of the frame is connected with a front blocking cover in a clamped mode, the inner wall of the frame is connected with an air blocking plate through a rotating shaft, and the air blocking plate is connected with the self-locking type air guiding plate. A supporting frame is installed in the air conditioner body, an anti-falling adjusting assembly is installed in the supporting frame, and a self-locking assembly is installed on the other side of the supporting frame. According to the anti-falling air conditioner air outlet device with the self-locking type air guide plate, the self-locking assembly adopts the innovative bidirectional clamping structure design, the self-locking assembly is composed of the limiting groove, the spring buckle and the anti-loose gasket, a mechanical locking state is formed, the design can effectively prevent the air guide plate from accidentally rotating, sundries and winged insects are prevented from entering, and the anti-falling air conditioner air outlet device is safe and reliable. And children are prevented from touching by mistake, and the situation of angle deviation or loosening and falling is avoided.

This invention relates to an electrochemical flash polishing method for completely removing focused ion beam-induced damage to easily oxidized metals, comprising: preparing a polishing slurry and placing it in a container; continuously stirring the polishing slurry in the container to maintain a uniform temperature; connecting a power supply and a time relay, and setting the power supply voltage and electropolishing time; connecting the sample to be treated and the time relay to complete the electrochemical polishing circuit setup; adding liquid nitrogen to the polishing slurry in small amounts multiple times to lower the temperature, using an freezing method to control the electrochemical flash polishing temperature; placing the sample to be treated into the polishing slurry; turning on the time relay to begin electropolishing of the sample, and automatically disconnecting the time relay when the electropolishing time is reached, removing the sample; cleaning the surface of the sample; and drying the sample to obtain a thin film sample free of focused ion beam-induced damage. Compared with existing methods, this invention is a universal electrochemical flash polishing technology applicable to body-centered cubic Fe and Fe-based alloys, achieving 100% removal of focused ion beam damage.

The scheme discloses a small-size oil cylinder general assembly device, which comprises a pair of clamping pincers capable of clamping along a Y direction, and further comprises a bottom plate extending along an X direction and a Y direction, and a positioning pin with an axis extending along a Z direction; the clamping pincers and the positioning pin are arranged on the bottom plate; a surface extending along the X direction and the Z direction is formed at a clamping point of the clamping pincers, and the axis of the positioning pin is on the surface; the positioning pin is movable and positionable along the X direction; a plurality of positioning pin mounting holes are arranged on the bottom plate along the X direction, and the positioning pin is inserted into one of the positioning pin mounting holes; and a limiting structure for limiting the positioning pin from being pulled out of the positioning pin mounting hole is further arranged. The scheme has the beneficial effects that the fixing problem of a cylinder body in the prior art is solved, the outer surface of the cylinder body is not scratched, the assembly efficiency is significantly improved, the appearance defects are greatly reduced, and the assembly demand of oil cylinders of multiple specifications can be met.

The invention relates to the technical field of drilling fluid treating agents, and discloses an anti-water-blocking agent, a preparation method thereof and a drilling fluid. The waterproof locking agent has a structure as shown in a formula (I), and X is halogen; n is 1-8; m is 0 to 6; p is 0 to 6; q is 0 to 6; the waterproof locking agent can play an excellent waterproof locking role in a drilling reservoir high-temperature environment;

The invention provides a polishing method for reducing the surface roughness of diamond, and the polishing method comprises the following steps: polishing a diamond material by adopting a reactive ion etching method, the radio frequency power of the reactive ion etching method is 10-1000 W, the etching time is 1-50 min, and the adopted gas comprises one or a combination of more of Ar, O2, Cl2, BCl3, SF6, CF4 and CHF3. According to the polishing method provided by the invention, the surface smoothness of the diamond can rapidly reach the sub-nanometer level, the defects such as subsurface damage and machining stress of the diamond can be eliminated, and the surface quality of the diamond is improved.

The application discloses a mold and a method for assembling a movable self-locking nut of a bracket, and the mold is mainly composed of a lower mold plate, a lower mold, an upper mold insert, a fixed plate, an upper mold plate, a first core block and a second core block. The upper mold insert is symmetrically and intervally arranged about the positioning groove of the lower mold, the upper end of the upper mold insert is detachably connected to the fixed plate, there are two parallel side surfaces on the upper mold insert, one of which is perpendicular to the lower end surface of the upper mold insert and forms a second forming surface of the bracket, and the other forms a first forming surface of the bracket at an angle of 45-60 degrees with the lower end surface of the upper mold insert. The core block comprises a pair of round edges which are consistent with the bending round corners when the movable self-locking nut is assembled in the bracket. During assembly, the pre-bending and final assembly forming of the bracket are completed by turning over the upper mold insert. The application has good assembly consistency, assembly gap and size stability, high assembly efficiency, and will not damage the surface plating layer of the movable self-locking nut.

The utility model discloses a non-contact testing device for testing the high-temperature performance of a wire rod, which comprises an environment box and a mounting rod, the mounting rod is arranged at the front part of a box door of the environment box, quartz glass is embedded in the center of the box door of the environment box, two fixing frames are arranged outside the mounting rod, and the fixing frames are fixed on the mounting rod. An adjustable adjusting frame is connected between the two fixing frames, a video extensometer and a green light source are arranged on the adjusting frame, the green light source is arranged on the side edge of the front portion of the video extensometer, an upper chuck and a lower chuck are connected to the upper position and the lower position in the environment box through sleeves respectively, and the upper chuck and the lower chuck are symmetrically arranged. Conical cavities are formed in the upper chuck and the lower chuck, and two wedge blocks are symmetrically embedded in the conical cavities; according to the testing device for non-contact testing of the high-temperature performance of the wire rod, the probability of jaw breaking, slipping and the like in the stretching process of the wire rod can be greatly reduced.

This invention relates to the field of oilfield chemistry and discloses a high-salt-resistant drag-reducing agent and its preparation method. The preparation method involves adding isopropanol to deionized water and stirring for 5-10 minutes to disperse it. Then, an amide-type quaternary ammonium salt, naphthyl-modified cyclodextrin, and disodium hydroxyethylidene diphosphonate are added, and stirring is continued for 10-15 minutes. Finally, triethanolamine is added, and stirring is performed for 3-5 minutes. The mixture is then filtered to obtain the high-salt-resistant drag-reducing agent. This invention utilizes the synergistic effect of the amide-type quaternary ammonium salt, naphthyl-modified cyclodextrin, and disodium hydroxyethylidene diphosphonate to construct a stable supramolecular worm micelle drag-reducing system. This results in a high drag reduction rate under freshwater conditions and maintains an extremely high drag reduction retention rate in high-salinity formation water environments with low core damage. The agent can be prepared using freshwater or directly using seawater or high-salinity reinjection water, making it suitable for fracturing operations in arid regions with scarce freshwater and offshore oilfields.

The utility model belongs to material storage and conveying technical field discloses a tray and workpiece feeding system, the bottom of tray is provided with first recess, first recess is shaped with the boss that sets on processing machine platform, thereby only need to make tray through first recess sleeve set in the outer periphery of boss, can position tray, moreover, because the outer periphery of the fence platform is shaped with support plate, when tray sleeve set in the outer periphery of boss, support plate can be supported on processing machine platform, thereby play the role of supporting tray. By the above, the tray in the utility model can be positioned and stably loaded on the processing machine platform, thereby ensuring that the subsequent mechanical hand can accurately and quickly pick up the workpiece, that is, in the utility model, the mechanical hand can directly pick up the workpiece from the tray without manual transfer of the workpiece, thereby eliminating the problem of damage to the workpiece during transfer, and also saving the time consumed in transferring the workpiece, thereby improving the production efficiency of the product.

The utility model discloses a fixed type trimming device which comprises a grinding head and a connector, the connector is arranged in the vertical direction, the grinding head is arranged at the bottom of the connector and movably connected with the connector, the diameter R of the grinding head is larger than the diameter r of a wafer polishing head, the grinding head forms a polishing belt on a polishing pad, and the diameter r of the polishing belt is larger than the diameter r of the wafer polishing head. The wafer is polished within the range of the polishing belt. Due to the fact that the fixed type structural design is adopted, the size of the grinding disc can be greatly reduced compared with the prior art, and due to the fact that the center area of the grinding disc is not used, the use amount of the polishing pad can be greatly reduced. Due to the fact that the connector adopts a vertical downward pressing mode, the stress of the grinding head on all points on the polishing pad is more uniform, the polishing pad is more uniformly trimmed, and the risks of polishing pad damage and wafer secondary pollution caused by non-uniform trimming are eliminated.

The application provides a low-viscosity toughened bismaleimide resin composition and a preparation method thereof, and belongs to the technical field of bismaleimide resins. The resin composition comprises a bismaleimide resin, an allyl compound, a reactive thermoplastic toughening agent, an active diluent and an ionic liquid solubilizer. The ionic liquid solubilizer and the bismaleimide resin only have physical interaction and do not react chemically, thereby avoiding the generation of insoluble gels and eliminating the need for filtration. The reactive thermoplastic toughening agent is a polyarylether sulfone oligomer containing an allyl group at the end, which can be combined into the resin network in the form of a covalent bond, without being separated out or significantly reducing the heat resistance. The resin composition obtained in this way has the advantages of low viscosity, high toughness, high heat resistance and more than 180 days of room temperature storage stability.

The invention belongs to the technical field of biological detection, and particularly discloses a full-automatic glycosylated hemoglobin separation and purification device which is used for solving the problems existing in glycosylated hemoglobin separation and purification. The device specifically comprises a separation and purification box, a box door is mounted at one end of the separation and purification box, a first mounting plate is fixed to the other side of the separation and purification box, on one hand, the position and height of a sampling needle are adjusted through a first motor and an electric push rod, and the sampling needle can conveniently suck a sample and put the sample into a hematolysis box; the hemolysis box, the filter cartridge and the chromatographic column are cleaned through a mixing rod, a second transmission pump and a first transmission pump, so that the glycosylated hemoglobin is convenient to separate and purify; on the other hand, the sample tube can be fixed through the spring and the check block, displacement of the sample tube is avoided, the sample tube is pushed to ascend through the supporting plate, the sample tube is conveniently taken out, and therefore the sample tube is conveniently assembled and disassembled.

This invention discloses a diesel engine throttle control device and a diesel engine. The throttle control device includes a transmission sleeve and a transmission shaft. The transmission sleeve is fitted onto the transmission shaft, and a torsion spring is provided between the transmission sleeve and the transmission shaft. One end of the torsion spring is located on the transmission sleeve, and the other end is located on the transmission shaft. A throttle handle travel hole is provided on the transmission sleeve. The transmission shaft is fixedly connected to a control handle, which extends out of the transmission sleeve through the throttle handle travel hole and can swing within the throttle handle travel hole. An input rocker arm is fixedly connected to the transmission sleeve, and an output rocker arm is fixedly connected to the transmission shaft. The throttle control device of this invention has both automatic and manual throttle control functions. In emergency situations, it can quickly switch to manual control of the diesel engine throttle, is easy to operate, and has a simple structure, thereby simplifying the structure of the diesel engine and reducing its cost.

The catheter comprises a catheter body, the far end of the catheter body is provided with a front slope opening, part of the catheter wall of the edge of a far-end catheter opening at the opening extends outwards to form a tongue-shaped tip, and the tongue-shaped tip is arranged opposite to the near-end catheter opening at the front slope opening of the catheter body and is integrally formed with the catheter body; a water-drop-shaped Murphy hole is formed in the side wall of the tongue-shaped tip side at the far end of the catheter body. According to the catheter for the tracheal intubation, the tongue-shaped tip and the catheter body are designed to be of the integrally-formed structure, and the improved drop-shaped Murphy hole design is adopted, so that the catheter is more suitable for the scene of intubation through a center line, such as intubation under a video laryngoscope and intubation through a laryngeal mask, airway injuries caused by intubation are reduced, and the tracheal intubation effect is improved. The trachea cannula has higher safety, reliability and operation efficiency in airway protection and difficult airway management, and is suitable for various different types of trachea cannulas of adults and children; and the guide pipe is simple in manufacturing process and convenient for mass production and manufacturing.

This invention relates to the field of wastewater treatment technology and proposes a low-carbon and energy-saving wastewater treatment device, comprising a body, an elastic expansion tube, a water intake pipe, a ceramic filter, a limiting ring, a shaping protrusion, and a driver. The shaping protrusion is fixedly disposed within the limiting ring. The driver is used to drive the limiting ring to reciprocate along a spiral path. When wastewater enters the elastic expansion tube through the inlet, the sidewall of the elastic expansion tube undergoes elastic deformation and abuts against the inner wall of the shaping protrusion and the limiting ring. This invention, by driving the limiting ring and shaping protrusion to reciprocate along a spiral path, greatly improves the consistency of water flow direction, significantly reduces the dynamic impact force of water flow on the ceramic filter, the elastic expansion tube wall, and the shaping protrusion itself, thereby reducing unnecessary energy loss and mechanical wear, achieving low-carbon and energy-saving cleaning of the ceramic filter, and extending the service life of key components.

The utility model relates to a kind of vacuum welding devices, including pedestal, and vacuum chamber fixed on pedestal, and welding mechanism fixed to pedestal, vacuum chamber includes chamber main body fixed on pedestal in midair, and the load plate that is driven along vertical direction relative chamber main body movement by driving mechanism, load plate and chamber main body form closed chamber after being closed, vacuum interface is equipped in chamber main body or load plate with closed chamber communication, vacuum welding device further includes elastic mechanism, at least part of elastic mechanism is connected with load plate, and remaining part is connected with driving mechanism.Advantages are that when driving mechanism pushes load plate to close, elastic mechanism pre-compression deformation provides flexible buffer, eliminates the damage of rigid impact to sealing structure;During vacuum adsorption and welding process, elastic mechanism continuously provides self-adapting compensation force, simultaneously, elastic mechanism can effectively absorb equipment vibration, avoid the instantaneous leakage caused by high-frequency micro-amplitude separation.

The application relates to a preparation method of high-temperature-resistant and impact-resistant PVC insulating material and belongs to the technical field of composite materials; a polyurethane flame-retardant chain extender with a pyridine ring structure, a phosphate structure and two hydroxyl structures in the structure is prepared, the polyurethane is modified by using the polyurethane flame-retardant chain extender, a flame-retardant polyurethane segment with the phosphate structure and the pyridine ring structure in the structure is prepared, and finally the flame-retardant polyurethane segment is grafted on the surface of glass fiber to obtain modified glass fiber. The modified glass fiber of the application is close to random distribution in the PVC matrix, and shows isotropy, so that the impact from different directions can be effectively resisted. In addition, the modified glass fiber of the application can effectively improve the rigidity of PVC and inhibit the thermal slip of molecular chains at the interface, so that the high-temperature resistance of the composite material can also be effectively improved.