43results about How to "Reduce plastic deformation" patented technology

According to the composite protective coating for the bolt surface, the preparation method and the application, the composite coating takes a bolt of a common model of an iron tower as a substrate, and a cathode arc ion plating technology and a magnetron sputtering technology are combined; the preparation method comprises the four main steps of substrate surface pretreatment, metal bonding layer preparation, metal nitride bearing layer preparation and surface molybdenum disulfide solid self-lubricating layer preparation. According to the method, reliable preparation of the composite coating on the complex thread surface of the bolt is achieved, the anti-loosening capacity of the bolt is remarkably improved through the low friction coefficient, good bearing capacity and excellent wear resistance, and meanwhile the composite coating further has good corrosion resistance and has wide application prospects in iron towers for communication, electric power and the like.

The invention relates to the technical field of machine tool intelligent machining, and discloses a machining method based on deep learning and multi-sensor fusion, which comprises the following steps: collecting data in the machining process of a numerical control machine tool, and preprocessing the data in the machining process of the numerical control machine tool to obtain a data set; inputting the obtained data set corresponding to the data acquired by the plurality of sensors into a Kalman filtering algorithm for Kalman recursive filtering processing to obtain fused actual observation data acquired by the sensors; inputting a data set corresponding to the fused actual observation data acquired by the sensor and the data acquired by the numerical control system into a depth Q network algorithm, and predicting to obtain an optimal tool path; a magnetic field is applied to the machined workpiece through the excitation module; and machining a machined workpiece model along the optimal tool path by adopting an ultrasonic tool high-frequency machining method. According to the invention, the surface quality of the to-be-processed workpiece can be obviously improved.

The invention belongs to the technical field of aircrafts, and particularly discloses a vertical take-off and landing aircraft landing system, a control method and an aircraft. The landing system of the vertical take-off and landing aircraft comprises a take-off and landing mechanism, an energy absorption mechanism and a braking mechanism. The landing gear comprises a rack, a supporting frame and aircraft wheels arranged at the lower end of the supporting frame, the energy absorption mechanism is arranged on the rack and used for absorbing kinetic energy generated when the supporting frame is turned outwards, the braking mechanism is used for adjusting braking force of the aircraft wheels so as to adjust the turning amplitude of the supporting frame, and when the aircraft lands, the braking mechanism actively adjusts the friction coefficient between the landing gear and the ground so as to adjust the turning amplitude of the supporting frame. The size of friction acting of the undercarriage and the ground and acting of an undercarriage energy absorption system is adjusted, so that the vertical acceleration of the fuselage of the aircraft is reduced, the fuselage load is reduced, the risk that the fuselage and airborne equipment are damaged due to plastic deformation is reduced, the load transmitted to passengers is reduced, the safety and reliability of the whole aircraft are improved, and safe landing of the aircraft is guaranteed. And the risk that the aircraft is damaged due to hard landing is reduced.

The invention belongs to the technical field of high-entropy alloys, and particularly relates to a CoCrNi series high-toughness high-density twin boundary medium-entropy alloy and a preparation method thereof. Aiming at the situation that the traditional alloy component design field lacks mature and reliable design principles, the invention provides three component design principles: high elastic modulus, low stacking fault energy and proper phase stability. Based on the three principles, the general formula of the non-equal-atomic-ratio medium-entropy alloy is CoaCrbNic, 30 < = a < = 37, 30 < = b < = 35, and 28 < = c < = 40. A metal raw material with the purity being 99.5% or above is polished and cleaned and then smelted into a cast ingot in a vacuum arc furnace, and then the medium-entropy alloy with high strength and toughness and the high-proportion twin boundary can be obtained after solid solution, hot rolling and recrystallization annealing processes are conducted. The design principle can also be popularized to other alloy systems, operation is easy, the production period is short, safety and reliability are achieved, and wide application prospects are achieved.

The filter screen assembly comprises a filter screen and a framework, the filter screen is used for containing squeezed objects, a plurality of filter holes are formed in the filter screen and used for allowing juice of the squeezed objects to flow through, the framework is arranged below the filter screen and comprises a plurality of main keels arranged at intervals, the ends of the main keels are installed on a base, and the main keels are arranged on the base. And at least part of the upper surface of the main keel abuts against the lower surface of the filter screen so as to support the filter screen. According to the technical scheme, the pressure bearing capacity of the filter screen is improved, and plastic deformation of the filter screen due to the fact that the filter screen bears too large pressure is reduced.

The invention provides a tube component and a vascular intervention catheter with the same, a notch is formed in the tube component, the notch is provided with a first edge and a second edge, and the first edge and the second edge are oppositely arranged in the axial direction of the tube component; the first edge and the second edge are arc-shaped on the unfolding plane of the pipe component; any point is used as an original point, a straight line passing through the original point and perpendicular to the axial direction of the pipe component is used as an X axis, a straight line passing through the original point and parallel to the axial direction of the pipe component is used as a Y axis, a coordinate system is established, the track of the first side meets a function, the track of the second side meets a function, y1 is larger than or equal to y2, a is the maximum width value of the notch in the axial direction of the pipe component, and b is the outer circumference of the pipe component. The tracks of the first side and the second side meet the cosine functions (1) and (2) respectively, the distribution area of large stress on the pipe component can be increased, stress concentration on the pipe component is reduced, and the fracture resistance and durability of the pipe component are improved.

The present invention relates to the technical field of cutting devices, and specifically discloses a cutting device for manufacturing yacht hardware, comprising a base frame, a clamping assembly for clamping hardware is arranged on the right side of the base frame, a fixing plate is fixedly connected to the top of the left side of the base frame, a fixing ring is fixedly connected to the top of the fixing plate, a cutting tool holder is rotatably connected to the inner wall of the fixing ring, a driving mechanism is arranged on the outside of the cutting tool holder, a plurality of fixing cylinders are plugged into the ring side of the cutting tool holder, a through pipe is fixedly plugged into the inside of the fixing cylinder, a cutting assembly is arranged on the side of the through pipe close to the axis of the cutting tool holder, a water injection assembly for injecting water into the cutting assembly is arranged on the outside of the cutting tool holder, the water injection assembly comprises a storage rack fixedly connected to the outer wall of the cutting tool holder, and through the cooperation of the above structure, cold water can be discharged to the blade, so as to facilitate cooling of the blade, reduce the possibility of plastic deformation of the cutting part of the blade caused by overheating of the blade, thereby avoiding damage to the tool that affects the cutting efficiency.

The utility model relates to the technical field of batteries, in particular to a battery box body, a battery and an electric device. The battery box body comprises a lower box body and a plurality of connecting pieces, the plurality of connecting pieces are arranged on the peripheral side of the lower box body at intervals, the connecting pieces are arranged on the lower box body in a penetrating manner, are in threaded connection with the bracket through first fastening pieces, and are made of steel materials. By arranging the connecting piece made of the steel material, the torque transmission efficiency can be remarkably improved, torque attenuation is avoided, plastic deformation and thread abrasion of the lower box body at the bolt fastening position are reduced, and the service life is prolonged; the structure is simple, and the production cost is reduced; disassembly, assembly and maintenance are convenient, and the maintenance cost is reduced. According to the battery, by applying the battery box body, plastic deformation and thread abrasion of the lower box body at the bolt fastening position can be avoided, the service life of the battery is prolonged, and the maintenance and production cost is reduced. By applying the battery, the service life of the power utilization device is ensured, and the maintenance and production cost is reduced.

This application relates to a permanent magnet electric roller, belonging to the field of motors, and includes a mounting base, a permanent magnet electric roller body, and an expansion sleeve assembly. The mounting base has a mounting through hole; the permanent magnet electric roller body includes a stator spindle, which passes through the mounting through hole; the expansion sleeve assembly is located between the mounting through hole and the stator spindle; when the stator spindle and the mounting through hole have relative rotation or a tendency to rotate relative to each other, the mounting through hole generates a limiting torque through the expansion sleeve assembly to limit the rotation of the stator spindle. When the permanent magnet electric roller is subjected to severe impact loads, the expansion sleeve assembly can absorb impact energy through slight deformation, and the stator spindle can slide relative to the expansion sleeve assembly, converting the impact energy into heat, thereby reducing the impact on the stator spindle. In addition, even if the impact is too large and causes the expansion sleeve assembly to fail, only the expansion sleeve needs to be replaced, without damaging the structural integrity of the stator spindle and the mounting base.

The wiring terminal comprises a shell and an elastic piece in a cavity of the shell, when the wiring terminal is used, an operating piece (such as a screwdriver and an ejector rod) is generally used for applying force to downwards press the end of a clamping part, in the scheme, a protruding part and a baffle are matched to limit the movement range of a tool bit of the screwdriver, for example, the tool bit of the screwdriver slides back and forth to correspondingly abut against the baffle and the protruding part, and therefore the clamping part is clamped. The movement of the tool bit is limited by the baffle and the protruding part, the limiting area for limiting the movement range of the tool bit of the screwdriver is formed between the baffle and the protruding part, the screwdriver is more stable when applying force to press the elastic piece clamping part, and the slipping phenomenon is reduced.

The invention belongs to the technical field of plate electromagnetic forming, and discloses a plate magnetic high-speed stamping forming device which comprises a female die and a male die used in cooperation, and a plate to be machined is arranged between the female die and the male die; a guide bin and a supporting block are arranged on the outer side of the male die. The supporting block is located at the bottom of the guide bin. The driving plate is located at the bottom of the male die and connected with the male die; the insulating block is fixedly provided with an electromagnetic coil, and the electromagnetic coil is connected with the pulse current loop through a wire; the electromagnetic coil discharges to generate electromagnetic force to enable the driving plate to move upwards so as to drive the male die to impact a to-be-machined plate at a high speed, and plastic deformation occurs in the material thickness direction. The invention further provides a machining method for machining the plate through the device. The device and the method have the advantages of high forming efficiency and high forming precision.

The invention discloses a reinforcing steel bar inclined interactive locking bridge deck slab connecting structure and a design method. A first prefabricated bridge deck slab and a second prefabricated bridge deck slab reserve first inclined gate-type reinforcing steel bars and second inclined gate-type reinforcing steel bars at the transverse end of a wet joint correspondingly and are arranged at equal intervals in the length direction of the wet joint; the first inclined door-type steel bar and the second inclined door-type steel bar are mutually sleeved and locked to form an inclined interaction locking shape, the horizontal lap joint length of the inclined interaction locking inclined door-type steel bars and the minimum width of the wet joint are determined, and at least four longitudinal straight line penetrating steel bars vertically penetrate through the whole wet joint length from the corners of the inner periphery of a hole channel formed by inclined interaction locking. By means of the first inclined door-type steel bars and the second inclined door-type steel bars which are arranged in the inclined mode, the length of the middle-section rotary steel bars is increased, the problem that thin plate structure connecting steel bars cannot be bent in a rotary mode is solved, the tensile bearing capacity of connection is greatly improved compared with linear steel bars, and meanwhile the lap joint length of the reserved steel bars can be reduced.

The utility model relates to the technical field of conveying pipelines, and discloses an anti-corrosion coating metal pipeline which comprises a pipe fitting, a pipeline body is arranged in the pipe fitting, a wear-resistant layer is fixedly arranged on the outermost layer in the pipeline body, and a ductile layer is fixedly arranged at the bottom end of the wear-resistant layer in the pipeline body. And an anti-fatigue layer is fixedly arranged at the bottom end of the tough layer in the pipeline. In the utility model, the material of the pipeline consists of the wear-resistant layer, the ductile layer, the anti-fatigue layer and the epoxy resin layer, the wear-resistant layer can resist the wear of a medium outside the pipeline to the pipeline wall and prolong the service life of the pipeline, and the ductile layer is positioned below the wear-resistant layer, so that the impact resistance and the overall strength of the pipeline can be improved, and the plastic deformation and fracture risk of the pipeline can be reduced; the anti-fatigue layer is located below the tough layer and used for improving the anti-fatigue performance of the pipeline and reducing fatigue damage of the pipeline under the action of alternating loads and vibration, and the epoxy resin layer serves as a curing coating of the innermost layer and provides anti-corrosion protection for the pipeline.

This utility model relates to the technical field of printed circuit board processing equipment, and discloses a fixture and auxiliary tooling for avoiding jamming of thin plates. It includes a plate body with clamping edges for holding the thin plate; a plurality of first clamping pieces spaced apart from the clamping edges; and a plurality of second clamping pieces corresponding to the first clamping pieces, each second clamping piece being positioned at a first preset distance from one side of the first clamping piece. The length of the second clamping piece is greater than that of the first clamping piece. The second clamping pieces are used to bend and engage with a worktable to clamp the thin plate between the first clamping pieces and the second clamping pieces. This design solves the problem of deformation, jamming, and even breakage of thin plate parts during clamping and transportation.

This utility model provides a small-diameter digital communication transmission cable, comprising: multiple pairs of twisted wires, wherein the twisted wires are arranged on both sides of a "I"-shaped filler and twisted together to form a cable core, and the outer side of the cable core is provided with a wrapping layer, a metal foil and plastic composite layer and an outer sheath from the inside to the outside; it solves the technical problems of traditional cables being unable to achieve small outer diameter, high bandwidth, strong anti-interference, long-distance transmission and high durability, and can optimize the cable core structure to improve anti-interference performance and signal transmission bandwidth while ensuring small outer diameter and high flexibility of the cable, and takes into account electromagnetic protection and mechanical strength through composite shielding design, thereby meeting the requirements of high-speed, long-distance and high-reliability communication.

The invention provides a ceramic roller blank processing device, and relates to the technical field of ceramic roller processing. A discharging port is formed in one end of the extrusion mechanism, a bearing table used for bearing a plain blank is fixedly connected to the discharging port, a sliding frame is slidably connected to the bearing table, a cutting tool used for cutting off the plain blank is slidably connected to the sliding frame, and a bearing rotary table is rotatably connected to the end, away from the discharging port, of the bearing table and provided with a bearing groove. An abutting block is slidably connected to the bearing rotary table, a reinforcing rod is fixedly connected to the abutting block, and the reinforcing rod can abut against the sliding frame and drive the sliding frame to move synchronously. According to the ceramic roller cutting device, the cutting device and the ceramic roller blank can move synchronously, the probability that the cutting plane is incomplete when the ceramic roller is cut is reduced, meanwhile, the cut ceramic roller blank can be moved, and the labor intensity of workers is relieved.

This invention provides a method for reducing friction and wear in a water-based lubricant based on magnetic field-controlled nanochains, belonging to the field of water-based lubricant technology. The invention utilizes magnetic Fe3O4 nanoparticles as raw materials and employs a silanization reaction to achieve magnetic field-assisted self-assembly of one-dimensional Fe3O4@SiO2 nanochains. These nanochains are then dispersed in deionized water or other basic lubricants to form a nanochain water-based lubricant. During lubrication, the one-dimensional nanochains are aligned perpendicular to the sliding direction using a magnetic field, achieving controllable orientation and forming a uniformly oriented rolling bearing structure on the contact area of ​​the friction pair. This significantly reduces the coefficient of friction and wear rate. The method is simple, uses environmentally friendly materials, and allows for real-time control of the lubrication state. It can be widely applied to friction reduction and wear resistance in mechanical transmissions, water-lubricated bearings, flexible device interface protection, and micro-precision moving parts.

The invention relates to a copper foil and a preparation method thereof, a lithium battery copper foil, a current collector, a pole piece, a battery and an electric device. The copper foil is provided with a first surface and a second surface which are opposite to each other, the glossiness of the first surface is Gs1, the glossiness of the second surface is Gs2, Gs1 is greater than Gs2, the main diameter of a crystal grain fitting ellipse of a cross-section crystal structure between the first surface and the second surface is recorded as phiED, the unit is [mu] m, and the phiED satisfies the following conditions: phiED = 2 * sqrt (a2 + b2), and phiED is 0.1 [mu] m-6. 5 [mu] m; wherein a and b are respectively a long radius and a short radius obtained by fitting an ellipse. The copper foil has high tensile strength and high elongation, can reduce fracture and wrinkling of the copper foil in the manufacturing process and the battery manufacturing and using process, and improves the cyclicity and safety of the battery.

The invention provides a tooth trace pure rolling gear rack mechanism based on an elliptic tooth profile combination function, and relates to the technical field of gear transmission, the tooth trace pure rolling gear rack mechanism comprises a gear and a rack, the end face tooth profile of the gear and the rack is composed of an end face working tooth profile curve and a tooth root transition curve, and the end face working tooth profile curve of the gear and the tooth root transition curve is an elliptic function. The tooth surfaces of the gear and the rack have arc tangent function and elliptic function combined tooth line structures, and control points are set for smooth connection; at least one pair of gear tooth meshing points of the gear and the rack are located at nodes to achieve pure rolling meshing contact, and meshing lines formed by moving tracks of the meshing points of the gear and the rack respectively form two combined function contact lines on the tooth surfaces of the gear and the rack. The method has the beneficial effects that two functions are smoothly connected at a specific control point by setting the specific control point to form a combined tooth line, so that the axial force is eliminated, and the service life of the bearing is favorably prolonged.

The application discloses an anti-vibration buffer flow guide structure of a capacitance diaphragm vacuum gauge, and belongs to the technical field of vacuum measurement. The anti-vibration buffer flow guide structure comprises an outer shell, an anti-vibration isolation structure arranged between a diaphragm and the outer shell, and a buffer layer composed of an elastic material. A buffer type gas flow guide structure is arranged on a gas flow path between a gas inlet and the diaphragm, and the buffer type gas flow guide structure comprises multiple layers of flow guide plates arranged in sequence along a gas flow direction, and each layer of flow guide plate is arranged at an inclined angle with the gas flow direction. The buffer layer composed of the elastic material cuts off a rigid transmission path of vibration from the outer shell to the diaphragm, and effectively filters wideband mechanical noise. Meanwhile, multiple layers of flow guide plates with different inclined angles are arranged on the flow path between the gas inlet and the diaphragm. Under the joint action, false deformation signals caused by environmental vibration and gas pulsation are greatly reduced, so that the reading of the vacuum gauge under real working conditions is closer to the static pressure true value in the cavity.

The present invention relates to the technical field of ceramic coatings, and specifically discloses a wear-resistant composite ceramic coating for bearings and a preparation method thereof. The raw materials of the wear-resistant composite ceramic coating for bearings include by mass: 40-60 parts of composite smelting material, 1-3 parts of nanographene, 1-3 parts of titanium powder, 1-2 parts of yttrium oxide, 0.1-1 parts of organic binder, 1-3 parts of chromium nitrate, 1-3 parts of aluminum nitrate, 0.1-0.2 parts of lanthanum zirconate, and 1-3 parts of tetraethyl orthosilicate; the raw materials of composite smelting material include by mass percentage: 20-30% nickel, 1-2% borax, 1-3% silicon powder, 1-2% cobalt powder, 1-2% carbon powder, and the balance is iron powder. After the rough machining of the inner ring spherical surface of the bearing of the present invention is completed, a layer of ceramic coating is formed on its surface, which not only improves the working hardness and wear resistance of the bearing, significantly reduces the friction coefficient, but also has excellent corrosion resistance, and can meet the long-term use requirements of many industries.

The utility model relates to the technical field of joints or sealing of underground structures, in particular to a connecting device for an inspection well and a pipeline, preformed holes are formed in a well wall, the connecting device comprises a connecting block, the connecting block comprises connecting clamping plates and an arc-shaped inserting plate, and each connecting clamping plate is provided with an arc-shaped groove; every two connecting blocks form a group, the two groups are located on the two sides of the well wall correspondingly, and the two connecting blocks in the same group are symmetrically arranged up and down; the arc-shaped inserting plate is inserted into the preformed hole, the connecting clamping plate abuts against the well wall, and the arc-shaped groove abuts against the pipeline; the two connecting blocks in the same group are locked and fixed through a locking mechanism; a drainage groove is formed in the connecting block on the upper side; a pouring channel is formed by gaps among the drainage groove, the well wall, the arc-shaped insertion plate, the preformed hole and the pipeline; compared with a manual concrete filling mode, effective pouring and flowing filling of the concrete can be achieved through the pouring channel, the problems of insufficient compactness, hollowing and the like caused by manual filling are avoided, and the concrete compactness of the connecting joint is guaranteed.

The invention belongs to the technical field of polyvinyl alcohol materials, and particularly relates to a modified polyvinyl alcohol composite material as well as a preparation method and application thereof. The modified polyvinyl alcohol composite material provided by the invention comprises p-formylbenzoic acid modified polyvinyl alcohol and melamine borate, the p-formylbenzoic acid modified polyvinyl alcohol is obtained by carrying out aldolization reaction on polyvinyl alcohol and p-formylbenzoic acid, and the molar ratio of the polyvinyl alcohol to the p-formylbenzoic acid is 1: (0.05-0.40); the mass percentage content of melamine borate in the modified polyvinyl alcohol composite material is 1-30%. The modified polyvinyl alcohol composite material provided by the invention has good mechanical properties in a high-humidity environment, overcomes the problem of insufficient mechanical strength caused by low crystallinity of an existing polyvinyl alcohol-based material, and expands the application range of the modified polyvinyl alcohol composite material.

The utility model discloses a circuit board elastic sheet structure, which comprises a welding part, a side plate and an elastic structure, the welding part is arranged on the circuit board, the elastic structure is connected with the welding part and extends towards the upper portion of the welding part, and the side plates are connected with the welding part and located on the two sides of the elastic structure. The elastic structure comprises a first elastic arm, a second elastic arm, a third elastic arm and a fourth elastic arm which are connected in sequence; the first end of the first elastic arm is connected with the welding part, the second end of the first elastic arm is connected with the first end of the second elastic arm, and the welding part and the second elastic arm are located on the same side of the first elastic arm; the second end of the second elastic arm is connected with the first end of the third elastic arm; the second end of the third elastic arm is connected with the first end of the fourth elastic arm; the second end of the third elastic arm is higher than the first end; and the fourth elastic arm is provided with a contact surface for sucking the SMD element. According to the utility model, the elastic sheet structure shaped like the Chinese character'ji 'is adopted, so that the length of each elastic arm of the elastic sheet is maximized, and the elastic performance of the elastic sheet structure is improved.

The application discloses a kind of adhesive tape cutting processes, comprising the following steps: S1: the adhesive tape to be cut in roll is installed on unwinding roller;S2: by unwinding roller make the base material layer of adhesive tape upward, release paper layer downward, and be sent to pre-cutting station along predetermined path;S3: when unwinding adhesive tape reaches pre-cutting station, first cutting device is not cut to the adhesive tape positioned at this time;S5: under the action of unwinding roller, the adhesive tape segment that has completed pre-cutting is sent to stretch separation station.Compared with prior art, the application uses first cutting device to cut incompletely by pre-cutting, then stretch separation uses stretch separation mechanism to break adhesive tape by tension, at the same time, due to release paper layer as support, adhesive layer will not be deformed or adhere to tool during cutting, the whole process avoids traditional one-time cutting-through process, cutting resistance is smaller, reduces plastic deformation and fiber pull-out, and also avoids the generation of burr.

The application discloses a punching process for a Mylar sheet, which solves the edge quality problem caused by uneven stress in traditional single-sided punching. The process realizes high-precision processing through double-sided synchronous punching and composite clamping positioning: after the Mylar sheet is introduced into the punching area by a conveying mechanism, the adsorption clamping mechanism is adsorbed and clamped by a negative pressure cavity and tensioned by an elastic pressure head, forming double positioning of center fixing and edge tensioning; the punch mechanism drives the asymmetric synchronous movement of the upper and lower punch heads through rack and pinion transmission, the lower punch head is driven to go down by the upper punch head, and the two punch heads meet and punch at the knife groove, so that the shearing force is symmetrically distributed on both sides of the material, and the unilateral bending moment effect is eliminated. The equipment adopts modular design, and the punch head and the adsorption box can be quickly replaced to adapt to different hole types. Through force field balance control and precise transmission, the process significantly reduces edge flanging and burrs, improves hole consistency, is suitable for precise Mylar sheet processing in the fields of electronics and electrical appliances, and has the advantages of high efficiency, stability, convenient type changing and the like.

This invention discloses a fusion reactor divertor tube-plate composite module and cooling target plate structure, relating to the field of magnetic confinement fusion divertor technology. The composite module includes a plasma-facing component and a transition layer. The plasma-facing component is located on the periphery and is used for contact with the plasma. A through-hole matching the transition layer is provided in the plasma-facing component. The transition layer is metallurgically connected within the through-hole, and a cooling pipe is metallurgically connected within the transition layer. Coolant flows through the cooling pipe to remove heat generated by fusion. The outer side of the transition layer has a U-shaped structure with a flat top and a round bottom, while the inner side has a circular structure. This design effectively increases the weight ratio of the transition layer to the plasma-facing component, improving the overall thermal conductivity of the composite module, alleviating stress and strain concentration problems, and ensuring the safety of the divertor target plate module, preventing the target plate material from detaching and contaminating the reactor core plasma under high heat loads.

The utility model discloses a reinforcing steel bar sample straightening machine for detection, which comprises a base, a pulley capable of moving left and right is arranged on the base, a lower bearing plate capable of moving front and back is arranged on the pulley, and a plurality of placing grooves for adapting to different reinforcing steel bars are arranged on the upper surface of the lower bearing plate. A reinforcing steel bar fixing mechanism for fixing a reinforcing steel bar is mounted on one side of the lower bearing plate; the device can effectively reduce the labor intensity of workers, can quickly adapt to straightening and straightening of multiple types of steel bars, is small in equipment occupied area, and improves the production efficiency on the basis of reducing local plastic deformation of a sample as much as possible and on the premise of not damaging the appearance of a raw material sample. And the situations of material damage loss, material local section diameter change, material mechanical property change and the like caused by material appearance change due to direct contact with a sample point are avoided.

The present disclosure provides a support plate, a display screen and a foldable electronic device, and relates to the technical field of display screens. The support plate comprises a first non-bending part, a bending part and a second non-bending part connected in sequence along a specified direction, the bending part is made of a dynamic covalent bond polymer, the bending part comprises a plurality of bending zones connected in sequence along the specified direction, the plurality of bending zones have isomorphic topological networks inside, two adjacent bending zones have different isomorphic topological networks, and have different rigidities based on the different isomorphic topological networks. By using the support plate of the present disclosure, the possibility of plastic deformation of the bending part can be reduced, so as to reduce the possibility of obvious creases appearing on the display screen after unfolding.