117 results about "Surface friction" patented technology

The invention discloses a constant-tension self-compensation coating method and an intelligent deviation adjusting method, and belongs to the technical field of material dynamic characteristic on-line testing and cooperative control, and the constant-tension self-compensation coating method comprises the following steps: obtaining stress distribution data of the surface of a coating base material, generating a multi-mode optical data set, analyzing a real-time tension estimated value and material dynamic characteristic parameters, and obtaining a multi-mode optical data set; wherein the dynamic characteristic parameters of the material comprise an equivalent elastic modulus and a surface friction coefficient; generating a dynamic coupling coefficient based on the real-time tension estimation value and the dynamic characteristic parameters of the material, performing analysis and calculation, and outputting a tension compensation control quantity and a deviation adjustment control quantity; and the tension compensation control quantity is executed to adjust the unwinding or winding torque, and meanwhile, the deviation adjusting control quantity is executed to adjust the angle of a deviation correcting guide roller. According to the method, the dynamic characteristics of the material are analyzed in real time by adopting multi-mode optical perception, and the tension deviation coupling model is constructed, so that interference advanced cooperative inhibition and working condition self-adaptive stable coating can be realized.

The invention discloses a hydraulic fracturing ground stress testing device and method, and relates to the technical field of hydraulic fracturing, and the hydraulic fracturing ground stress testing device comprises testing equipment. According to the hydraulic fracturing ground stress testing device and testing method, through the design of testing equipment, a water source enters the water pump pipe from the water inlet pipe, water flow is sprayed outwards from the nozzle in the water pump pipe, so that the hydraulic fracturing effect is achieved, the rotating mechanism is driven to rotate through flowing of the water flow, and the effect of cleaning the inner wall of a pipeline through friction is achieved; the rubber pipe is extruded by sliding the packing top block on the packing base, so that the rubber pipe is extruded and deformed to be attached to the surface of soil, the packing effect on a test part is achieved, the silica gel column is arranged in the rubber pipe, the silica gel column has a certain supporting effect and prevents a part from being concaved inwards and collapsed, and the rhombic film is arranged on the outer side of the rubber pipe, so that the rubber pipe is prevented from falling off. Therefore, surface friction force of components is increased, service life of the components is prolonged, and friction load is dispersed.

The utility model discloses a bridge cylindrical surface tension and compression support which comprises an upper support assembly, a cylindrical surface assembly, a piston assembly, a middle support assembly and a lower support assembly. The piston assembly comprises a piston, a large circular groove is formed in the bottom of the piston, and a rubber plate is embedded in the large circular groove; the middle support assembly comprises a middle lining plate, and the top of the middle lining plate is also arranged in the large circular groove in the bottom of the piston; a sealing ring is further arranged between the rubber plate and the middle lining plate, and the rubber plate is sleeved with the sealing ring. The cylindrical surface friction pair and the rubber plate are adopted in the upper structure and the lower structure of the support respectively to meet different rotating deformation requirements of a bridge in the longitudinal bridge direction and the transverse bridge direction, meanwhile, the L-shaped guide rails are arranged in the longitudinal bridge direction and the transverse bridge direction respectively to transmit vertical drawing force of the structure, the stress and deformation functions of the support structure are clear, and later inspection and maintenance are facilitated.

The invention belongs to the technical field of high-performance aluminum alloy surface functional coatings, and discloses an aluminum alloy composite wear-resistant coating and a preparation method thereof.The method comprises the steps that the surface of an aluminum alloy matrix is pretreated, so that the surface is clean and dry; through a laser-assisted cold spraying method, dry aluminum alloy powder is sprayed on the surface of the pretreated aluminum alloy matrix, and a laser-assisted cold spraying coating is formed on the surface of the aluminum alloy matrix; a laser-assisted cold spraying coating is polished, cleaned and dried, then micro-arc oxidation treatment is carried out, an Al2O3-based ceramic wear-resistant coating is formed on the surface layer of the laser-assisted cold spraying coating, then cleaning and drying are carried out, and the aluminum alloy composite wear-resistant coating is prepared on the surface of an aluminum alloy matrix. Through the synergistic effect of the two technologies of laser-assisted cold spraying and micro-arc oxidation, the surface friction performance of the aluminum alloy is remarkably improved, and the high requirements of the fields of mechanical manufacturing, aerospace and the like for the wear resistance of aluminum alloy components are met.

The utility model discloses a BOPP (biaxially-oriented polypropylene) unwinding device, which belongs to the technical field of film unwinding devices and comprises a base, a distance adjusting mounting frame arranged on the upper end face of the base, a movable frame slidably mounted on the distance adjusting mounting frame, a conical pressing part used for being inserted into two ends of a paper tube of a BOPP film roll for clamping and fixing, and an anti-loosening pressing part mounted on the movable frame and used for providing rotation damping. According to the technical scheme, the distance between the movable frames is adjusted through the distance adjusting mounting frame, then the distance between the conical pressing pieces is adjusted, the conical pressing pieces are inserted into the two ends of a film roll paper tube, then clamping force is applied to achieve the fixing effect, and film rolls of different lengths and different calibers can be fixed; the anti-loosening pressing piece is in friction contact with the surface of the film roll, certain damping force is provided, and it is guaranteed that when unwinding is stopped, the BOPP film roll cannot continue to be unwound due to inertia rotation.

The utility model discloses a lifting hook, and relates to the technical field of lifting hooks, the lifting hook comprises a lifting ring connected with a lifting device, the lifting ring is provided with a lifting hook, and an anti-falling plate is rotatably arranged at an opening of the lifting hook; the lifting hook is fixedly sleeved with an elastic sleeve for hanging a lifting rope, and limiting baffles are arranged at the positions, located at the two ends of the elastic sleeve, of the lifting hook; the anti-falling plate is rotationally arranged at the opening of the lifting hook and can be automatically closed after the lifting rope is hung, so that the lifting rope is prevented from accidentally separating from the lifting hook; the elastic sleeve can increase the friction force between the elastic sleeve and the lifting rope and is matched with the limiting baffles at the two ends of the elastic sleeve, transverse displacement of the lifting rope caused by shaking of the heavy object is limited from the contact surface friction layer and the physical blocking layer, the lifting stability of the heavy object is effectively improved, the unhooking risk is reduced, and the safety of lifting operation is guaranteed.

The invention relates to the technical field of heating pads, in particular to a production method of a heating pad and the heating pad, and the heating pad comprises a surface layer, a heating sheet, a bonding bottom layer and release paper which are sequentially stacked from top to bottom; anti-slip lines are formed on the upper surface of the surface layer, a bonding surface is constructed on the lower surface of the bonding bottom layer, and the release paper is adhered to the lower part of the bonding surface; wherein the heating piece is electrically connected with the control switch, the control switch is electrically connected with the power source, and through the unique layered composite structure, collaborative improvement of multiple technical advantages is achieved; firstly, an integrated compact surface layer is formed after the polyurethane layer is cured, so that the surface of the heating pad is endowed with excellent waterproof performance, the heating pad can effectively resist liquid erosion, and meanwhile, the structural stability and safety of the product at a relatively high heating temperature are ensured by the material characteristics of the heating pad; and secondly, the surface of the surface layer is integrally formed with the anti-skid lines, so that the surface friction coefficient is obviously increased.

The invention belongs to the technical field of geotechnical engineering testing, and particularly relates to a geotechnical bag interlayer contact surface friction angle in-situ testing method which comprises the following steps: forming geotechnical bag interlayer friction surfaces between geotechnical bags; acquiring point cloud data of the interlayer friction surface of the geotechnical bag; obtaining a three-dimensional roughness parameter according to the point cloud data; and obtaining the interlayer contact surface friction angle according to the function relationship among the interlayer contact surface friction angle, the three-dimensional roughness parameter and the friction coefficient of the woven bag. Friction angle parameters can be directly obtained on an engineering site, and the defects that traditional indoor test equipment is large in size, complex in operation, long in consumed time, high in cost and difficult to meet site conditions are overcome. Through the combination of compression loading, laser scanning and roughness parameter calculation, the method is simple and convenient in test step and high in efficiency, can quickly obtain an accurate friction angle value under various load conditions, provides a reliable basis for slope reinforcement design and stability analysis, and has remarkable practical value and popularization prospect.

The invention relates to a back coating film, a protective film applying the back coating film and a preparation method, the back coating film comprises a two-layer structure of a bottom layer and a surface layer, the bottom layer adopts a reaction type slipping agent, the surface layer adopts a non-reaction type slipping agent, and after the protective film is formed after a base material is formed into a film, the bottom layer and the surface layer both form a structure with the friction coefficient gradually increased from inside to outside. The friction coefficient of the surface layer is higher than that of the bottom layer. On the premise of not increasing the total dosage of the slipping agent for the back coating film, the surface friction coefficient of the back coating film is further reduced, and the damage to the bonding performance of the back coating film and a base material is avoided. The protective film is convenient to wind and unwind in the high-speed production process, and the film surface performance of the protective film is not damaged.

The invention discloses a preparation method of a fine structure surface RB-SiC friction pair based on throttling expansion self-suction type multiphase jet flow, and aims to solve the technical problems of poor uniformity and easy generation of microcracks in fine machining of an RB-SiC material. According to the method, negative pressure is formed through the throttling expansion effect generated when micron diamond gas jet flows through a Laval nozzle, nano diamond slurry with the shear thinning characteristic is automatically sucked in, and cell type diamond cluster abrasive multiphase jet is formed through online mixing; when the surface of a workpiece is impacted, grinding material clusters are depolymerized, uniform fragile region erosion of the material is achieved through the micron diamond, flexible finishing is conducted by means of ploughing and micro-cutting effects of the nano diamond, and therefore generation of micro cracks is synergistically inhibited. And in combination with a mask plate technology, the preparation of the high-quality fine structure surface is finally realized. Through the synergistic effect of multi-phase jet flow online mixing and cell type grinding materials, the quality of the machined surface is remarkably improved, and the method is suitable for preparing the high-performance RB-SiC friction pair.

The application relates to a preparation method for reducing the surface friction of single crystal diamond and application, and the preparation method comprises the following steps: step one, determining a predetermined working environment of a single crystal diamond base material; step two, determining a surface energy regulation direction according to the predetermined working environment; when the predetermined working environment is a gas phase environment, the regulation direction is to reduce the surface energy, or when the predetermined working environment is a liquid phase environment, the regulation direction is to increase the surface energy; step three, according to the regulation direction determined in step two, selecting a corresponding surface energy regulation method to modify the friction working surface of the single crystal diamond. The preparation method is combined with the design of the surface energy directional regulation of the single crystal diamond crystal face intrinsic friction characteristic ordering rule, can effectively inhibit the friction failure of micro components, and prolongs the service life of a device.

The invention relates to the technical field of RPET manufacturing, and discloses an RPET manufacturing device and a method thereof.The RPET manufacturing device comprises a pelletizing assembly and an operation table, a supporting plate is fixed to the top of the operation table, a hobbing cutter is arranged on the supporting plate, and an upper feeding roller and a lower feeding roller are arranged on one side of the hobbing cutter; and the auxiliary assembly is arranged at the top of the operation table and comprises an adjusting piece, the adjusting piece comprises a rotating shaft fixed to one side of the lower feeding roller, a movable block is rotationally connected to the outer side of the rotating shaft, a connecting block is fixed to one side of the movable block, and a threaded column is rotationally connected to the top of the operation table. The grain cutting device has the beneficial effects that in the grain cutting process, when the feeding speed of the feeding roller to a wire material is too high or too low, the feeding speed of the feeding roller can be adaptively reduced or increased through the auxiliary assembly, after adjustment, the surface of the feeding roller can be cleaned, and after the friction force of the surface of the cleaned feeding roller is stable, the normal feeding speed can be recovered.

The utility model relates to buffering structure technical field discloses a kind of buffer block, open and close lid structure and container. Buffer block includes: strong buffering section;Weak buffering section, is connected and set in the upper end of strong buffering section;In the opening lid stroke, strong buffering section and weak buffering section can be in preset order and mating surface friction contact, the resultant moment of buffering moment of buffer block, elastic moment of elastic member and gravitational moment of lid body in different stages of opening lid can always keep enough slow change trend, utilize the cooperation of strong buffering section and weak buffering section, provide and actual demand matched friction buffering force, guarantee that opening lid speed can maintain steady state in the whole stroke of opening lid, prevent container from being bounced or dumped by larger impact.

The utility model relates to the technical field of carton production, and discloses a paperboard feeding and conveying device for carton production, which comprises a mounting rack, a conveying mechanism arranged in the middle of the rack, baffles arranged on the front side and the rear side of the rack, and deviation rectifying mechanisms arranged at the bottoms of the inner sides of the baffles. In the conveying mechanism, an output shaft of a second motor drives a second belt wheel, a first belt wheel on a second rotating rod rotates through belt transmission, and the second rotating rod is driven. Power teeth at two ends and driven teeth at two ends of the first rotating rod are in transmission connection with a conveyor belt to guarantee stable power transmission. The conveying belt is made of a rubber material, is good in flexibility and smoothness, reduces friction to the surface of the paperboard, avoids scratch abrasion caused by scraping, is moderate in friction force, ensures that the paperboard moves stably and is not damaged, and improves the appearance quality and the product grade of paperboard conveying. In addition, the conveying structure guarantees stable operation of the conveying belt, stable feeding is conducted for follow-up machining, and the carton production quality and efficiency are improved.

The utility model discloses a welded pipe with friction embossing on the outer surface, an outer welded pipe is sleeved on the outer side of an inner welded pipe to be welded and fixed, a plurality of circles of friction embossing belts are processed on the outer side pipe surface of the outer welded pipe, and the plurality of circles of friction embossing belts are mutually separated and transversely arranged on the outer welded pipe. A plurality of protruding friction stripes are arranged on the single-circle friction embossing belt, the friction stripes surround the outer side pipe face of the outer welding pipe, the friction stripes are separated from one another, the separation portions are concave pressing groove bodies, and pressing protruding stripes are further arranged on the outer surfaces of the friction stripes. By means of the mode, the friction textures can be arranged on the outer side of the welded pipe to improve the friction degree of the surface of the welded pipe, the welded pipe is used for the fields of welded pipe clamping, protection, stacking and the like, and the welded pipe is formed by sleeving and welding the inner and outer welded pipes and is good in protection performance. Friction stripes arranged in an array mode are arranged on the outer side of the outer welding pipe and provided with pressing protruding lines to improve the friction capacity, and the friction degree is greatly improved due to the fact that the arrangement directions of the friction stripes and the pressing protruding lines are different.

The invention belongs to the technical field of aeronautical part manufacturing, and relates to a manufacturing device and method for an aeronautical clamping ring. The wire feeding part is used for conveying rectangular steel wires, the production efficiency is improved, and manual operation errors are reduced. The sliding groove provides a stable guide forming channel for the rectangular steel wire, the contact face of the wide face of the rectangular steel wire and the support base is increased, and the problem of wide face friction caused by steel wire inclination in a traditional process is solved. And the rectangular steel wire is bent and formed by applying pressure to the rectangular steel wire through the mandrel. And the mandrel is rotationally connected with the bracket base, so that the mandrel is in sliding contact with the rectangular steel wire, the contact friction force is reduced, and the problem of extrusion deformation of the raw material steel wire is effectively reduced. The linear position adjusting part is used for adjusting the position of the support base in the first direction, and the forming radius of the clamping ring can be adjusted. And the discharge port mandrel is positioned between the wire feeding part and the bracket base. And the discharge port is used for limiting a steel wire output path and is matched with the mandrel to bend and form the rectangular steel wire.

The utility model discloses a rolling shaft and a slide, and belongs to the technical field of recreation facilities, the rolling shaft comprises a shaft assembly, a nylon sleeve is sleeved on the arc-shaped outline of the shaft assembly, a first gap is arranged between the nylon sleeve and the shaft assembly, the first gap is used for lubricating rotation and friction deceleration, and a pipe assembly is sleeved on the arc-shaped outline of the nylon sleeve. The sliding ladder comprises a sliding ladder side plate, and a plurality of rolling shafts which are arrayed at equal intervals are connected to the sliding ladder side plate. The nylon sleeve is in friction with the surface of the shaft assembly, rotation is achieved instead of a traditional bearing, the manufacturing cost is effectively reduced, the uncontrollable speed caused by too fast rotation is effectively reduced, the risk of uncontrollable speed during playing of children is reduced, and meanwhile the situation that the children are scalded due to the fact that the surface is too hot is avoided.

The present application relates to the field of extinction film, in particular to a kind of antiskid extinction film and preparation method thereof, to solve the poor antiskid performance of existing extinction film, easily leading to packaging sliding, unstable stacking problem;The antiskid extinction film is composed of four-layer structure that anti-adhesion layer, support layer, connecting layer and extinction layer are sequentially stacked and co-extruded;The preparation method uses modified polypropylene, composite modified antiskid particle as modified raw material to modify the extinction layer of the lowermost layer of antiskid extinction film, uses modified polypropylene to improve the adhesion and flexibility of antiskid extinction film, uses composite modified antiskid particle to build composite rough structure, significantly increases the surface friction coefficient under the synergistic effect of the two, so as to give the excellent antiskid performance of antiskid extinction film, which can effectively prevent packaging sliding, stacking collapse.

The utility model discloses a saw blade easy to remove chips, which comprises a saw blade body and a mounting end, a plurality of chip removal grooves are circumferentially arranged on the saw blade body, a chip accumulation groove is arranged on the saw blade body close to the chip removal grooves, and a heat conduction groove is arranged in the chip accumulation groove in a downward extending manner. The mounting end comprises a mounting groove formed in the saw blade body, a limiting protrusion and a connecting end are arranged on the portion, close to the mounting groove, of the saw blade body, and a blade is detachably connected into the mounting groove through an external bolt. The saw blade has the advantages that the problems that in the prior art, in the using process of a saw blade, when a tool bit of the saw blade makes contact with a workpiece, a large amount of cutting heat is generated due to friction of a cutting face, the service life of the tool bit is virtually shortened, the tool bit of an existing saw blade is inconvenient to replace, and the tool bit of the saw blade cannot be replaced easily after teeth are broken are solved. And the whole saw blade needs to be replaced, so that the use cost is increased invisibly.

The invention discloses an unwinding mechanism, and belongs to the field of unwinding devices. The unwinding mechanism comprises a pair of side vertical plates which are arranged in parallel, and at least two connecting cross beams are connected between the two side vertical plates; a first tensioning roller, a third tensioning roller, a second tensioning roller, a first adjusting roller, a second adjusting roller, a first guide roller and a second guide roller are further connected between the two side vertical plates. A base material led out of a material coil sequentially passes through the first tensioning roller, the third tensioning roller, the second tensioning roller, the first adjusting roller, the second adjusting roller, the first guide roller and the second guide roller. And a static elimination rod is connected between the two side vertical plates between the second adjusting roller and the first guide roller. According to the electrostatic eliminating device, the electrostatic eliminating rod is integrally installed on the unwinding path, the distance between the electrostatic eliminating rod and the base material is accurately controlled to be within the range of 1-5 cm, electrostatic charges generated by friction of the surface of the base material are efficiently neutralized, and the situation that the base material carrying the electrostatic charges adsorbs dust and impurities in the environment in the conveying process is avoided.

The utility model discloses a film conveying device for a film cutting machine. The film conveying device comprises a base, an adjusting assembly fixed to the base, a transition roller, a pressing roller and a traction assembly, wherein the transition roller and the pressing roller are sequentially arranged on the adjusting assembly according to the film entering sequence, and the traction assembly is fixed to the base. The traction assembly comprises a mounting seat, an upper main traction roller, a lower main traction roller, an upper auxiliary roller and a lower auxiliary roller, notches are formed in rubber sleeves on the upper main traction roller and the lower main traction roller, and spring rings are arranged in the notches and are flush with the edges of the notches; when the upper main traction roller and the lower main traction roller rotate, the rubber sleeves on the upper main traction roller and the lower main traction roller are deformed, and the spring rings are exposed out of the edges of the notches, so that the stability of friction force in the film conveying process is ensured; and the situation that the rubber sleeves on the upper main traction roller and the lower main traction roller are used for a long time or deformed due to extrusion, and consequently surface friction force is insufficient, and film conveying is affected is prevented.

The invention discloses a metal additive manufacturing bearing retainer of a lattice topology non-uniform gradient porous structure and a machining method of the metal additive manufacturing bearing retainer, belongs to the field of bearing retainer design, and aims to solve the problems of unreasonable porous structure distribution, limited mechanical properties and surface frictional wear in the prior art. The retainer body is an annular retainer body, a plurality of pockets used for containing rolling bodies are machined in the outer circle face of the retainer body at equal intervals in the circumferential direction, the retainer body is of a non-uniform gradient porous structure prepared in a metal additive manufacturing mode, and the area, large in stress and serious in abrasion, in the retainer body is a high-stress area. A non-bearing area in the retainer body is a light-weight area, the porosity of a high-stress area is low, the porosity of the light-weight area is high, a transition area is arranged between the high-stress area and the light-weight area, and the porosity of the transition area is arranged from the low porosity to the high porosity in a smooth gradient mode. The bearing retainer is mainly light in weight and reasonable in structural design.

The invention relates to a multilayer super-smooth carbon film and a preparation method and application thereof. The multi-layer super-smooth carbon film comprises a transition layer, a working layer and an outermost layer which are sequentially formed on the surface of a substrate, wherein the transition layer is a metal and nonmetal doped carbon film; the working layer is a multi-layer hydrogen-containing amorphous carbon film formed by alternate soft layers and hard layers; and the outermost layer is a hydrogen-containing amorphous carbon film. According to the method, a mode of combining ion beam deposition and radio frequency magnetron sputtering is adopted, and the soft and hard alternating multi-layer high-hydrogen-content amorphous carbon film with the ultralow friction characteristic is deposited on the surface of a base body such as a bearing and a gear; the technical problems that a protective film on the surface of a moving part of heavy equipment is limited in bearing capacity, unstable in friction coefficient and serious in abrasion under the heavy-load or ultrahigh-heavy-load working condition are solved, the lubricating performance of a carbon film under the extreme heavy-load and harsh working condition is improved through the soft and hard alternate strengthening and toughening multi-layer structural design of the film, and the service life of the carbon film is prolonged. The problems that a solid coating is large in surface friction torque and short in service life are solved.

The invention discloses a data and mechanism hybrid driven threaded connection structure pressure-bearing surface friction coefficient prediction method, and belongs to the technical field of mechanical assembly and tribology. The method comprises the following steps: establishing a mapping model of a friction coefficient of a pressure-bearing surface, a fractal dimension D (T) and a scale coefficient G (T) based on a three-dimensional fractal theory; measuring the microtopography of the pressure-bearing surface under different tightening torques, and calculating fractal parameters D (Ti) and G (Ti) by adopting a structure function method; constructing a BP neural network prediction model by utilizing MATLAB software, and outputting fractal parameters D (T) and G (T) by taking the initial fractal parameters D0 and G0 and the tightening torque as input; the fractal parameter-torque equation is substituted into a pressure-bearing surface friction coefficient theoretical model, and a mathematical model of the pressure-bearing surface friction coefficient theoretical model changing along with tightening torque is established. According to the method, the surface topography change is quantified through the fractal theory, dynamic prediction is achieved in combination with the neural network, the problems that in numerical control machine tool bolt connection, the friction coefficient dispersion of the pressure bearing face is large, and the pretightening force is difficult to control are solved, and theoretical support is provided for precise control and improvement of the bolt pretightening force.

The application relates to the technical field of optical lens edge grinding clamping processing, and particularly discloses a clamping device for optical lens processing, which comprises a bed base, a grinding wheel mechanism is arranged in the bed base, a cutting knife is arranged in the bed base, and a clamping assembly for clamping and fixing the optical lens is arranged in the bed base; the multiple rollers are arranged, the rollers are always in contact with the edges of the D-shaped lenses during the edge grinding of the D-shaped lens centering, the rollers form supporting force which counteracts the edge grinding force generated by the rotation of the grinding wheel mechanism, thus the vibration of the D-shaped lens during the edge grinding is prevented, the accuracy of the centering edge grinding is improved, and since the rollers can rotate and the required friction force is very small, the rollers can be driven to rotate through the surface friction force when the D-shaped lens rotates, so that the friction force between the rollers and the D-shaped lens does not wear the D-shaped lens, and the accuracy of the centering edge grinding is ensured.

The utility model relates to the technical field of data acquisition, and discloses a workpiece detection tool with a data acquisition function, which comprises a detection platform, the top of the detection platform is fixedly connected with a U-shaped plate, the middle part of the top surface of the U-shaped plate is provided with a hole, the inner wall of the hole is slidably connected with a smooth block, the left side of the inner wall of the U-shaped plate is slidably connected with a baffle plate, and the baffle plate is fixedly connected with the detection platform. A handle is fixedly connected to the left side of the baffle, a telescopic rod is fixedly connected to the interior of the detection platform, a sliding plate is fixedly connected to the top end of the telescopic rod, a flat plate is rotationally connected to the middle of the top surface of the detection platform, and a rotating shaft is rotationally connected to the right side of the top surface of the detection platform. The workpiece is moved to a designated position, the handle is pulled to enable the baffle to slide out, the sliding block slides to the top end of the workpiece along the inner wall of the hole, the telescopic rod is started to push the sliding plate to move upwards, the flat plate rotates around the shaft, the rotation angle is measured, the workpiece surface friction force is calculated, and surface roughness calculation is achieved.

The invention relates to the technical field of chemical fiber textile production equipment, in particular to a modular suspension conveying device for spinning cake circulation, which comprises two conveying rails arranged in parallel, electric sliding rails extending along the length direction of the conveying rails are arranged on the conveying rails, and electric sliding seats capable of sliding along the electric sliding rails are movably assembled on the electric sliding rails. The lifting mechanism is arranged, so that the lifting rod directly penetrates through the center hole of the spinning cake, axial centering and radial restraining of the spinning cake are achieved, horizontal rotation and radial swing possibly occurring during running, acceleration or deceleration of the spinning cake are effectively limited, accidental collision between the spinning cakes and between the spinning cake and equipment is avoided, and the spinning efficiency is improved. The rotatable limiting roller is located at a vertical closed position during transportation, the spinning cake is prevented from slipping off from the lower end of the hanging rod due to vibration or inertia, the surface friction and scraping of the spinning cake are avoided, the quality defects such as broken filaments are avoided, and a push fork driven by an electric push rod is integrated to serve as a built-in active push-out mechanism.

The invention discloses a quantitative analysis method of a concave-convex double-nut bolt anti-loosening structure for a power transmission tower, and relates to the technical field of mechanical connection anti-loosening, and the quantitative analysis method comprises the following steps: obtaining basic parameters of bolts and nuts; determining the equivalent diameter of a supporting surface, the equivalent length of an upper concave nut and the equivalent length of a lower convex nut based on concave-convex matching characteristics; calculating static pre-tightening force and contact surface friction torque based on the equivalent parameters; constructing a function model of the bolt bar axial force distributed along the thread height, and analyzing the axial force distribution condition; and calculating a dynamic deformation correction based on the external dynamic load parameter and the material damping coefficient, and correcting the static pre-tightening force by using the correction to obtain an anti-loosening performance index under the dynamic working condition. The problems that an existing general calculation method cannot accurately quantify geometric mechanical characteristics of a concave-convex variable cross-section structure, cannot analyze an internal axial force distribution rule and lacks a dynamic anti-loosening performance quantitative evaluation means for the structure are solved.

The utility model relates to a board processing positioning device for furniture manufacturing, including the stand, the top of stand is provided with the adsorption limiting mechanism for adsorbing fixed board, place the board needing positioning on the stand, the auxiliary roll of stand both sides can assist the feeding of board, the rolling of auxiliary roll, the surface friction of board is smaller, through the start four motors drive four output rods to rotate respectively, and then control four rotating rods rotating adjustment, adapt to the board of different width, place the adsorption tray on four rotating rods, through the start cylinder drive connecting plate movement, connecting plate drive two long poles to move, drive two pistons to move respectively, the piston moves in the pipe body, forms the negative pressure to the piston top, and the adsorption of board is more firm, and the rotating rod rotation will rotate on the reinforcing ring, and the ball at the bottom of rotating rod is located in the rolling of annular groove, and rotating rod rotating adjustment has the effect of enhancing the support property.

This utility model discloses a detachable cake baking pan, comprising a cake ring and a base formed by a metal sheet connected around the cake ring. The ends of the cake ring overlap and slide together, and the ends are connected together by a locking buckle. Each end of the cake ring has a flange, and the end on the same side of the cake ring is connected to the flange by an arc transition. The flange is designed to be upturned. This utility model has the following advantages: The flanges at both ends of the cake ring, connected by an arc transition, ensure surface-to-surface contact between the arc surface and the end. Even if the guide is inadequate, a point on the arc surface at both ends will abut against the overlapping end, resulting in surface-to-surface friction, preventing the non-stick coating from being quickly scraped / scraped off.