109 results about "Internal friction" patented technology

The self-adaptive staged energy consumption friction-shear yield composite damper comprises a friction energy consumption unit, an inner friction plate, an outer friction plate, at least two shear energy consumption units and an H-shaped steel plate, wherein the inner friction plate and the outer friction plate are located on the friction energy consumption unit, and the H-shaped steel plate is located at the tail end of the friction energy consumption unit and used for fixing the friction energy consumption unit. The prestressed bolt sequentially penetrates through the inner friction plate and the outer friction plate on the friction energy dissipation unit and the shear energy dissipation unit and is connected with the inner friction plate and the outer friction plate on the friction energy dissipation unit and the shear energy dissipation unit through at least one pair of linkage rods, and the two ends of the friction energy dissipation unit are connected to beam-column joints respectively. The linkage rod does not make contact with a linkage rod penetrating hole of the shearing energy dissipation unit during displacement, and only the friction energy dissipation unit works; and the linkage rods make contact with the linkage rod penetrating holes in a displacement mode, the shear energy dissipation devices are fixed, the shear plates are subjected to shear deformation, and the earthquake displacement response of the structure is effectively reduced through staged energy dissipation and the displacement amplification effect.

The utility model discloses a damping bearing seat assembly, including bearing body, bearing sleeve frame and bearing seat, bearing body is fixed in bearing sleeve frame, the bottom end of bearing sleeve frame is fixed connection with mounting plate, threaded rod passes through the through-hole on mounting plate and then is threaded connection with threaded groove, the bottom end of mounting plate is fixed connection with the flashboard, and the flashboard is fixed on the bearing sleeve frame. The two sides of the insertion plate are fixedly connected with external damping layers, and the insertion plate is inserted into an insertion groove in the bearing seat. According to the vibration reduction bearing seat assembly, when the bearing body operates and vibrates, the mounting plate is fixedly mounted in the butt joint groove to achieve the primary rigid vibration reduction effect, meanwhile, the bearing body and the bearing sleeve frame transmit vibration to the inserting plate, internal friction is generated between the external damping layer on the outer side of the inserting plate and the internal damping layer on the partition plate, and the vibration reduction effect is achieved. Vibration energy is converted into heat energy through internal friction between the external damping layer and the internal damping layer, and the vibration reduction effect is achieved.

The invention discloses a dynamic real-time measurement method and device for the friction coefficient in a rotary shear type granular material, and belongs to the technical field of granular material measurement. The dynamic real-time measurement device for the friction coefficient in the rotary shear type granular material comprises a rotary shear rheological experiment cavity which is connected to a bottom plate through a mounting bracket; the filler is filled with a to-be-detected granular material; the normal load monitoring unit comprises an upper pressure sensor and a lower pressure sensor which are located on the upper portion and the lower portion of the rotary shear rheological experiment cavity, in-situ real-time measurement of the internal friction coefficient of the granular material in the shear flowing process is achieved, and the technical problem that the internal friction characteristic of the granular material is difficult to measure through a traditional method is solved. A cooperative working mechanism of an axial constraint type dynamic loading platform, an annular medium distribution structure and a rotary shear rheological experiment cavity is innovatively designed, shear flow in the granular material is achieved, and the internal friction coefficient of the granular material is measured.

The present application belongs to the technical field of metal materials, and particularly relates to a method for in-situ measuring MC carbide solid solution and precipitation temperature by internal friction. The present application uses pure iron and pure chromium to prepare Fe-Cr based alloy samples, processes the samples into internal friction samples after solid solution and rolling; in a vacuum environment, the samples are heated to a preset target temperature covering the expected solid solution characteristic temperature range of MC carbide at a constant rate and are kept at the temperature, then are cooled at the same rate, the internal friction value and modulus are continuously measured, and a first and second in-situ internal friction temperature spectrum is drawn; the frequency dispersion characteristics of grain boundary relaxation peak, the internal friction value mutation and the modulus change in the two temperature spectra are compared to determine the solid solution temperature and precipitation temperature of MC carbide. The method has high sensitivity and simple operation, and is suitable for in-situ characterization of grain boundary precipitates in low carbon content Fe-Cr based alloys.

The application relates to a drainage asphalt mixture grading design method based on a single particle size main skeleton concept, which comprises the following steps: selecting raw materials; adding 6mm, 8mm and 11mm screen meshes to finely divide coarse aggregate particle size subintervals; designing coarse aggregate grading, selecting single particle size coarse aggregates with different particle size subinterval proportions to construct a coarse aggregate main skeleton structure; proposing a particle size distribution index, calculating the particle size distribution index corresponding to the single particle size coarse aggregates with different particle size subinterval proportions; designing fine aggregate grading; adopting a coarse aggregate void filling method to determine asphalt content and coarse and fine aggregate ratios; forming test pieces to conduct mechanical property verification tests and drainage performance evaluation tests; and taking the particle size distribution index value to guide coarse aggregate grading design. The coarse aggregate main skeleton structure has good embedding and extruding capacity and internal friction resistance, the mixture prepared by optimizing grading has the characteristics of good skid resistance and strong drainage performance, and the rain environment high-speed driving safety can be significantly improved.

The utility model discloses a kind of viscous damping wall devices for bridge, belong to damping equipment technical field, comprising: movable member is movably inserted in damping wall, damping cavity is provided in the damping wall, damping liquid is provided in the damping cavity, the movable member sliding connection with damping cavity can be with damping liquid and shear motion occurs, the movable member includes the fixed connection of fixed part with bridge superstructure, the fixed part bottom end sliding connection has the plugboard connecting piece that can be along bridge transverse sliding, plugboard connecting piece is fixedly connected with plugboard, the plugboard sliding connection is in damping cavity.The utility model is converted into heat energy dissipation by the internal friction effect between fluid molecules, and the mechanical vibration energy of structure is continuously converted into heat energy dissipation, to effectively reduce the dynamic response of structure.

This invention relates to a design method for reinforcing rock mass structures with small-diameter piles under post-load conditions in the field of slope protection. The method first obtains the inclination angle θ of the outward-dipping structural surface, the internal friction angle and cohesion c, the sliding mass weight γ, the sliding mass height H, the stress ratio n between the pile and the rock mass at the structural surface, the vertical load q applied to the upper part of the sliding mass after the construction of a single deeply embedded small-diameter anti-slide pile, the sliding mass width b, and the horizontal extension length l. Then, using these parameters, it calculates the initial axial force of the deeply embedded small-diameter anti-slide pile before sliding, the deflection angle of the deeply embedded small-diameter anti-slide pile when the anti-slide force is at its maximum, the minimum compressive stiffness of the small-diameter anti-slide pile, and the axial force and anchorage length of the deeply embedded small-diameter anti-slide pile caused by compression after minor deflection deformation at the structural surface. This invention saves resources compared to empirical design methods.

The present application belongs to the technical field of highland tunnel construction, in particular to a tunnel side and upward slope collapse treatment method, the treatment method comprises S5, parameter inversion and model calibration: comparing the displacement data monitored in step S2 with the predicted value of the model in step S1, when the deviation exceeds the preset threshold, the slope geometric model is kept unchanged, the geomechanical parameters in the model are systematically inverted and adjusted by using the iterative algorithm, the stability state calculated by the three-dimensional wedge method is matched with the actual state of the slope reflected by the monitoring data, so as to calibrate the model, and the geomechanical parameters at least include the effective cohesion and effective internal friction angle of the sliding surface. The tunnel side and upward slope collapse treatment method accurately identifies the geometric shape and size of the potential unstable wedge body from the beginning through three-dimensional geological modeling and stereographic projection analysis, so that the treatment measures are more targeted, and blindness is avoided.

The invention relates to the technical field of precision manufacturing of automobile parts, and discloses a flexible machining process for a shaft head of an automobile driving system, which comprises the following steps: firstly, immersing the shaft head to be machined into a liquid low-melting-point alloy, and forming full-surface profiling coating and holding after cooling and phase change; then, in the rough machining stage, the medium temperature is reduced and maintained in a low-temperature high-rigidity interval, and a high-rigidity support obtained after medium hardening is used for resisting large cutting force; in the finish machining stage, the medium temperature is actively increased to a near-melting-point high-damping interval, and high-frequency flutter energy is effectively dissipated by utilizing the friction characteristic in crystal boundaries in cooperation with ultrasonic vibration cutting; and finally, melting an interface layer by utilizing a high-frequency induction skin effect to realize rapid lossless unloading. The rigidity and damping characteristics of a medium are dynamically regulated and controlled through a thermal-force coupling feedback mechanism, the problems of clamping deformation and machining chatter of a thin-wall hard workpiece are effectively solved, and the geometric dimension precision and the surface quality of a shaft head are improved.

The invention relates to a high-strength and high-damping ZA22 / 6061 layered composite material and a preparation method thereof. The composite material is of a five-layer sandwich structure formed by sequentially and symmetrically overlapping an outer layer, a middle layer, a central layer, a middle layer and an outer layer, in the preparation method, through the solid solution and aging heat treatment process, the optimization requirements of the microstructures of the two alloys can be met at the same time; and meanwhile, an interface layer which consists of fine grains and is proper in thickness is formed in situ at the interlayer interface. The inherent problem that two alloy heat treatment systems are incompatible is successfully solved, the yield strength of the obtained material is larger than or equal to 180 MPa, the tensile strength is larger than or equal to 190 MPa, the ductility is larger than or equal to 20%, and meanwhile the room-temperature internal friction value of the material at the testing frequency of 0.5 Hz is not lower than 0.028.

The application discloses a rock stratum horizontal stress measuring method based on a digital drilling technology, and steps of the method comprise the following steps: step 1, a rock digital drilling test is carried out by using a digital drilling device, a relationship between a cutting stress and a feed force is obtained, and then a contact friction angle θ between a cutting surface of a diamond blade and a compression crushing zone is calculated; step 2, the contact friction angle θ obtained in step 1 is used to solve an internal friction angle φ of the rock; and step 3, α, θ, φ', φ obtained in steps 1 and 2 and a rock cohesion c measured are used to solve a confining pressure P of surrounding rock f The method has the advantages of low cost, simple calculation and high precision.

The application discloses a kind of based on deformation monitoring data's slope instability evaluation method, it is related to slope engineering monitoring data analysis field, method is: obtaining the related data such as topography, stratum, foundation monitoring point in the range around slope;According to the distribution of deformation foundation monitoring point and deformation fitting potential sliding surface;Establish three-dimensional finite element model of slope, and determine the cohesion and internal friction angle of potential sliding surface by inversion;The inversion cohesion and internal friction angle of sliding surface are calculated by strength reduction method, and the safety factor of slope is determined;According to the horizontal displacement direction of foundation monitoring point and potential unstable slope body, the sliding direction of slope is determined;Finally, the slope, potential unstable slope body and its sliding direction are displayed through visual platform, and the volume of potential unstable slope body and the safety factor of slope are displayed by text.The application determines the three-dimensional sliding surface of slope by surface fitting, and then calculates the safety factor of slope by parameter inversion and strength reduction method, realizes the early warning description of slope instability form including instability volume, direction and other characteristics.

The application discloses a method and device for determining an anti-overturning coefficient of a pit-in-pit double-row-pile supporting structure, and relates to the technical field of foundation pit engineering. The method comprises the following steps: determining a trapezoidal cross-section earth covering rupture angle and an earth covering rupture surface of a trapezoidal cross-section earth covering between a pit-in-pit structure and a double-row-pile supporting structure according to an internal friction angle of soil; determining an anti-sliding force of soil above the earth covering rupture surface according to the size of the trapezoidal cross-section earth covering between the pit-in-pit structure and the double-row-pile supporting structure, the trapezoidal cross-section earth covering rupture angle and the shear strength of the soil layer; and determining the anti-overturning coefficient according to the anti-sliding force of the soil above the earth covering rupture surface, the earth pressure outside and inside the foundation pit, the distance between the anti-sliding force action point and the bottom of the double-row-pile supporting structure and the self-weight of the double-row-pile and the soil between the piles. The method solves the problem that the embedded depth of the supporting structure is generally designed according to experience and is too conservative in the prior art, and the embedded depth of the supporting structure is too deep, which greatly increases the construction cost.

The invention relates to the field of rubber additives, and provides a lignin-based composite material as well as a preparation method and application thereof. In order to solve the problem that in the prior art, the heat generation temperature of rubber prepared by taking lignin as a reinforcing agent is too high, the lignin-based composite material provided by the invention comprises the following components in parts by weight: 100 parts of lignin, 5-50 parts of a porous material, 1-30 parts of a metal oxide modifier, 1-20 parts of an organic acid modifier and 0.1-5 parts of a methylene donor. The preparation method comprises the following step: mixing lignin, a metal oxide modifier, an organic acid modifier, a methylene donor and a porous material to obtain the lignin-based composite material. According to the invention, organic acid salt generated by reaction of organic acid and a metal oxide modifier is used for in-situ interface modification, so that the interface compatibility of lignin and natural rubber can be effectively improved, the internal friction between rubber molecular chains is reduced, and the heat generation temperature of lignin is further reduced.

The invention belongs to the field of direct shear apparatuses, and relates to a device and a method for testing the anti-shearing characteristic of a large-particle-size rock-soil material, which can adapt to a test of internal friction force of large-particle-size rock-soil and can most approximately simulate the actual condition of actual large-particle-size rock-soil accumulation. According to the technical scheme, the device comprises a support, a vertical pressurizing module, a horizontal pressurizing module and a shear box. The vertical pressurizing module is fixed to the support and provided with a first loading piece in the vertical direction. The horizontal pressurizing module is fixed to the support and provided with a second loading piece in the horizontal direction. The shear box is respectively connected with the first loading piece and the second loading piece.

The present application relates to the technical field of highway construction, and particularly relates to a magnesium-based grouting reinforcement slurry mix proportion design method, wherein three kinds of slurry with different cement mixing ratios are configured in the slurry mix proportion design process, and 2-4% of active magnesium oxide curing agent is added to each of the three kinds of slurry to carry out a comparative test, and the final design quality mix proportion is determined through comparison of the results after 28d standard curing. The present application has the following advantages: the incorporation of active magnesium oxide promotes the hydration reaction of cement, improves the early strength of the composite foundation, and promotes the construction progress; the active magnesium oxide-cement composite slurry can significantly increase the cohesion and internal friction angle mechanical parameters of the composite foundation soil, improve the roadbed bearing capacity, reduce the overall settlement of the roadbed, and ensure the stability of the composite foundation; the magnesium hydroxide crystals generated by the hydration reaction of active magnesium oxide produce expansion to compensate for the shrinkage caused by the hardening of cement.

Brake caliper, comprehensive: a case (110); Pistons (121, 122) are arranged on opposite sides of the housing (110); inner and outer lining plates (123, 124) which are at least partially arranged in the housing (110) and are movably configured by the pistons (121, 122), each of the inner and outer lining plates (123, 124) having projections (123a, 124a) on opposite sides of each of the inner and outer lining plates (123, 124); inner and outer friction linings (125, 126) coupled to the inner and outer lining plates (123, 124) respectively; and a lining spring (200, 300, 400) comprising a plurality of guide supports (220, 250) configured to guide the movement of the inner and outer lining plates (123, 124), each of the guide supports (220, 250) comprising the following: a concave curved section (230, 260, 330, 430, 460) in which one of the projections (123a, 124a) of the inner and outer covering plates (123, 124) is arranged; and a return tab (240, 270, 340, 440) configured to elastically support one of the inner and outer lining plates (123, 124) such that one of the inner and outer lining plates (123, 124) returns to an original position in response to the movement of one of the inner and outer lining plates (123, 124) by the return tab (240, 270, 340, 440), wherein the concave curved section (230, 260, 330, 430, 460) of the lining spring comprises an upper part (230a, 260a), a side part (230b, 260b) which is bent downwards from the upper part (230a, 260a) of the concave curved section (230, 260, 330, 430, 460) of the lining spring (200, 300, 400), and a lower part (230c, 260c) which extends from the side part (230b, 260b) of the concave curved section (230, 260, 330, 430, 460) of the lining spring (200, 300, 400) to one of the inner and outer lining plates (123, 124) is bent, and wherein each of the guide supports (220, 250) further comprises a lateral support projection (246, 281) which is curved and extends from a lower section (245, 280) of one of the guide supports (220, 250) which is located below the concave curved section (230, 260, 330, 430, 460) in a direction away from one of the inner and outer covering plates (123, 124).

The invention discloses a metal mine soft rock roadway mechanical tunneling excavation method which comprises the following steps: step 1, dividing a roadway section into six areas, and designing eight different excavation sequence schemes; 2, lithology, compressive strength, cohesion and internal friction angle parameters of roadway section rock are determined, and a three-dimensional numerical model is established; 3, numerical simulation is conducted on surrounding rock responses under different excavation sequences; 4, calculating the ratio of the plastic zone area to the maximum deformation of each scheme, and preferably selecting four schemes with relatively large stability evaluation coefficients; 5, constructing a reference sequence and a comparison sequence, and calculating a correlation coefficient and a correlation degree; and 6, the excavation scheme with the minimum correlation degree is the optimal excavation sequence scheme. According to the method, a metal mine soft rock roadway mechanical tunneling excavation sequence method based on numerical simulation and grey correlation analysis is optimized, the problems that a traditional method is low in efficiency, poor in forming and large in surrounding rock disturbance are solved, and safe and efficient tunneling of the soft rock stratum is achieved.

The invention relates to the technical field of polymer composite materials, and discloses an environment-friendly low-noise automobile rubber damping part and a manufacturing process thereof.The damping part is made of a rubber composite material, and the rubber composite material comprises a dynamic reversible cross-linked rubber matrix, an anti-aging agent, an anti-aging agent and an anti-aging agent. A nanofiller having a core-shell structure; wherein the dynamic reversible cross-linked rubber matrix comprises the following components in parts by mass: 100 parts of furan functionalized epoxidized natural rubber; 3 to 8 parts by mass of bimaleimide; the content of the nanofiller with the core-shell structure is 5-20 parts by mass. By introducing the specially designed core-shell structure nanofiller, an innovative interface friction energy dissipation mechanism is constructed in the material, and the mechanism and the viscoelastic internal friction of a rubber matrix have a synergistic effect to form a dual energy dissipation way, so that vibration energy can be more efficiently absorbed and converted, and the energy dissipation efficiency is improved. And the excellent damping characteristic is shown under a wide working condition.

The invention belongs to the technical field of strip mining and rock soil solidification, and particularly relates to a composite material for solidifying mud rock in a strip mine and a preparation method of the composite material. The main components of the composite material for solidifying the mudstone in the strip mine comprise mudstone, fly ash, calcium oxide and a bacillus subtilis suspension. The invention also provides a preparation method of the composite material for solidifying the mudstone of the strip mine, which comprises the following steps: pretreating the mudstone and the fly ash, preparing bacillus subtilis suspensions with different concentrations, fully mixing a mudstone sample, the fly ash, calcium oxide and the bacillus subtilis suspensions, carrying out compression molding, and maintaining for 7 days or 28 days to obtain the composite material for solidifying the mudstone of the strip mine. The composite material for solidifying the strip mine mudstone is obtained. According to the method, the compressive strength, cohesive force, internal friction angle and other mechanical properties of the strip mine mudstone are remarkably improved, and the disintegration resistance and the impermeability are greatly improved, so that the slope stability is effectively enhanced.

This invention discloses a method, device, and storage medium for calculating the bearing capacity of a coral sand-gravel pile composite foundation. The calculation method includes: determining the initial void ratio, minimum void ratio, unit weight, internal friction angle, crushing energy dissipation coefficient, and internal friction angle of the original coral sand; calculating the lateral ultimate stress of the coral sand by introducing a crushing energy dissipation correction term; calculating the ultimate bearing capacity of a single pile according to the bulging limit equilibrium formula; analyzing the bearing capacity characteristic values ​​of the foundation design load and layout scheme, and adjusting the gravel pile reinforcement parameters or layout scheme; this calculation method quantifies the "particle crushing effect" of coral sand and introduces a crushing energy dissipation correction term to achieve coupled correction of the bulging balance calculation formula; field load tests show that the bearing capacity of the corrected composite foundation is reduced to less than 5%, significantly reducing the calculation error of the traditional formula, and is suitable for rapid evaluation and design optimization of the bearing capacity of coral sand vibratory compaction gravel pile composite foundations.

This invention provides a method, system, equipment, and medium for calculating the heave stability of a circular shaft structure. The method includes: determining the basic parameters of the circular shaft structure, including the shaft diameter, excavation depth, retaining structure embedment depth, soil cohesion, internal friction angle, soil weight, and uniformly distributed ground load; calculating the bearing capacity coefficient and its susceptibility based on the basic parameters; dividing the sliding soil at the bottom of the circular shaft structure into a Rankine active zone, a Rankine passive zone, and a transition zone, and determining the geometric parameters of these zones; determining the external influence width based on the basic parameters and geometric parameters; and calculating the heave safety factor of the circular shaft pit using a formula based on the basic parameters, bearing capacity coefficient, and external influence width. This invention can determine the heave safety factor of a circular shaft pit, and the determined safety factor better reflects the actual situation.

The invention provides a horizontal well collapse pressure determination method and device, equipment and a storage medium, and the method comprises the steps: for each well section of a target horizontal well, determining horizontal principal stress corresponding to the well section based on the rock mechanics parameters of the well section and a preset horizontal principal stress formula, and determining the collapse pressure of the target horizontal well based on the horizontal principal stress corresponding to the well section; the method comprises the following steps: accumulating the liquid column pressure from 0 according to the cohesive force, the internal friction angle, the formation pore pressure and the effective stress coefficient which are obtained in advance, carrying out iterative processing on a capacity function until the value of the capacity function is equal to 0, and further determining the liquid column pressure corresponding to the capacity function being 0 as the collapse pressure corresponding to a well section. According to the method, the geostress model based on the micro-structure is used as a support, the influence of factors such as liquid column pressure and borehole wall percolation zone pore pressure change is considered at the same time, the collapse pressure is determined accurately and reliably, and technical support can be provided for borehole wall stability of the deep coal horizontal well, optimal design of drilling fluid density, reduction of underground complex accidents and improvement of drilling speed and efficiency.

This utility model discloses a combined vibration damping pad for a speaker bracket. It relates to the field of speaker vibration reduction technology and includes: a connecting plate, a base at the bottom of the connecting plate, a rubber block fixedly connected to the bottom of the base, a sliding rod fixedly connected to the inner wall of the connecting plate, and a damping rubber slidably connected to the outer wall of the sliding rod. This utility model, through a combined design of a buffer spring, damping rubber, and an air ring, forms a multi-dimensional vibration absorption and isolation system. The buffer spring directly absorbs vibration energy through elastic deformation, while the damping rubber dissipates energy through its own material damping characteristics and internal friction. The combination of these two effectively avoids the resonance problem easily caused by a single spring structure. The air ring deforms with the relative movement of the connecting plate and the base, and the internal gas flows through the flow holes to generate airflow damping, further supplementing the buffering effect. The synergistic effect of multiple buffer structures enhances the vibration damping performance.

The invention relates to the technical field of coatings, and particularly discloses a flame-retardant water-based damping coating and a preparation method thereof. The coating is prepared from the following components in parts by weight: 100 to 110 parts of ternary blended emulsion, 2 to 4.9 parts of deionized water, 80 to 111 parts of filler, 20 to 25 parts of flame retardant and 11 to 21 parts of auxiliary agent, wherein the ternary blending emulsion is formed by mixing a first styrene-acrylate copolymer emulsion, a second styrene-acrylate copolymer emulsion and an acrylate emulsion. According to the invention, by adjusting and controlling the composition and proportion of the ternary blended emulsion, a polymer matrix with excellent internal friction characteristics is constructed; the matrix not only has good damping potential, but also can realize high compatibility with the added flame retardant and other components, so that the finally obtained coating integrally has excellent flame retardant property and damping property.

The invention discloses a coral sand gravel pile composite foundation bearing capacity calculation method and device and a storage medium. The calculation method comprises the steps that the initial void ratio, the minimum void ratio, the weight, the internal friction angle, the crushing energy consumption coefficient and the stone internal friction angle of original coral sand are measured; a crushing energy consumption correction term is introduced to calculate lateral limit stress of the coral sand; calculating the ultimate bearing capacity of the single pile according to an expansion ultimate balance formula; analyzing a foundation design load and an arrangement scheme bearing capacity characteristic value, and adjusting a gravel pile reinforcement parameter or an arrangement scheme; according to the calculation method, the particle crushing effect of coral sand is quantified, and a crushing energy consumption correction term is introduced to realize coupling correction of a ballooning balance calculation formula; a field load test shows that the bearing capacity of the corrected composite foundation is reduced to be within 5%, the calculation error of a traditional formula is greatly reduced, and the method is suitable for rapid evaluation and design optimization of the bearing capacity of the coral sand vibro-replacement gravel pile composite foundation.

The invention belongs to the technical field of protein bar transportation and production, and discloses an automatic production mechanism based on nutritional meal replacement protein bar production, which comprises a conveying assembly I. The outer walls of the two ends of the conveying assembly I are fixedly connected with L-shaped groove frames, and a mixing barrel is fixedly arranged between the two L-shaped groove frames in a combined manner; rolling equipment is further fixedly mounted on the outer walls of the two ends of the first conveying assembly in a combined manner; the motor drives the concave-convex annular plate to rotate and intermittently abuts against the arc angle plate to drive the ball rod to repeatedly hit the outer wall of the mixed material barrel, high-frequency vibration force is generated, materials attached to the barrel wall are separated, caking and accumulation of raw materials are avoided, meanwhile, friction force in the materials is reduced, and follow-up smooth discharging is guaranteed. The problem of conveying blockage caused by powder raw material adhesion and particle caking in traditional production is solved, an arc-shaped flow guide plate in the discharging barrel is matched with an impeller, the impeller is driven to rotate through material falling impact force, secondary stirring of the raw materials is achieved, the arc-shaped flow guide plate guides the materials to evenly flow and be discharged at the same time, and local accumulation is avoided.

A method of acquiring and analyzing properties of a fresh or partially set cement-based material includes penetrating the material with a probe driven by a controller-regulated actuator; measuring, with a force sensor, penetration forces applied to the probe; transmitting, from the sensor, force data to the controller; determining, by the controller, penetration depths based on the force data and / or actuator position data; recording, by the controller, the depths; associating, by the controller, the depths and the forces to form synchronized pairs; determining, by a processor, the yield force of the material based on change in relationship between the depth and the force within the pairs, and calculating, by the processor, a static yield stress of the material based at least in part on the yield force, a probe geometry factor, and an angle of internal friction of the material. A portable penetration device is also disclosed.

The invention relates to the field of welding processing, in particular to an intelligent welding system for a metal spiral weld joint and a welding method of the intelligent welding system. An intelligent welding system for metal spiral welding seams comprises a base, a support is fixedly connected to the base, a first telescopic rod is fixedly connected to the support, a welding gun frame is fixedly connected to the movable end of the first telescopic rod, two movable plates are slidably connected to the support, each movable plate is rotationally connected with a rotating frame, and each rotating frame is provided with an inner friction plate. A welding method used by the intelligent welding system for the metal spiral weld joint comprises the following steps that S1, a steel coil is unfolded, flattened and then conveyed into equipment; s2, rolling into a tubular shape; s3, polishing the inner side of the steel pipe in the process of rolling the steel pipe into a pipe shape; and S4, a spiral welding seam formed in the rolling process is welded through laser. The welding quality of the inner side welding seam can be improved.

The application discloses a steel production method, and forms a microstructure on the surface of a sample; a relationship function of a friction coefficient changing with roughness is obtained according to the friction coefficient values and the roughness values of multiple samples; a first threshold interval of the friction coefficient is determined, and a second threshold interval of the roughness is obtained through the relationship function of the friction coefficient changing with the roughness, wherein, in the second threshold interval, the friction coefficient value and the roughness value are inversely proportional; and the microstructure is formed on the surface of a steel plate, so that the roughness of the surface of the steel plate is within the second threshold interval. The steel production method realizes accurate control of the surface performance of the steel, guarantees the formability of the steel processed into parts, and avoids problems such as poor appearance and surface quality of the parts.