165 results about "Static friction coefficient" patented technology

The invention relates to the technical field of silicon core pipe performance detection, in particular to HDPE silicon core pipe performance detection equipment which comprises a mounting bottom plate, vertical plates are fixed to the top of the mounting bottom plate in a bilateral symmetry mode, and horizontal sliding rails are mounted on the top of the mounting bottom plate and located on the right sides of the vertical plates in a front-back symmetry mode. The opposite sides of the two vertical plates are each provided with a clamping unit for clamping a silicon core pipe, the mounting bottom plate and the vertical plate on the right side are jointly provided with a pressing detection unit, and the two horizontal sliding rails are jointly connected with a friction detection unit through electric sliding blocks. The pressure resistance of the silicon core pipe can be detected through the pressure dynamic detection unit, and the dynamic and static friction coefficients of the silicon core pipe can be detected through the friction detection unit, so that three-sample data of the silicon core pipe can be rapidly and synchronously detected, the cost of various detection equipment is reduced, the detection efficiency can be improved, and the detection cost is reduced. And three detection steps are combined into one detection step.

The invention relates to a powder metallurgy copper-based friction material for a large-displacement motorcycle and a preparation method of the powder metallurgy copper-based friction material, and belongs to the technical field of preparation of powder metallurgy copper-based friction materials. The surface Rockwell hardness HR15N of the powder metallurgy copper-based friction material is 50-70, the dynamic friction coefficient can reach 0.7 or above, the static friction coefficient is 0.8 or above, the wear rate is smaller than 1 * 10 <-7 > cm / (N.m), and the dynamic friction coefficient wave is smaller than 0.02. The brake can be applied to large-displacement motorcycle brakes. According to the preparation method of the powder metallurgy copper-based friction material for the large-displacement motorcycle, a pressure-free continuous sintering process is adopted, the raw materials are evenly mixed for 1-6 h according to the formula, then the mixture is pressed into a blank, high-temperature sintering is conducted in the reducing atmosphere, then machining forming is conducted, and the powder metallurgy copper-based friction material for the large-displacement motorcycle is obtained.

The invention discloses a pull type electric tension machine and method for tension stringing of a power transmission line, and relates to the technical field of tension machines, the pull type electric tension machine comprises a supporting frame, a traction wheel is arranged on one side of the interior of the supporting frame, and driving teeth are arranged in the middle of the supporting frame; a tension adjusting assembly for adjusting the tension of the electric wire and a conical roller assembly for improving the guide of the electric wire and uniformly distributing the tension are arranged on the other side in the supporting frame, and an inclined roller assembly is arranged in the middle of the supporting frame. In the electric wire traction process, the vibration machine transmits vibration to the surface of the electric wire through the elliptical shell and the round roller, so that the electric wire generates small displacement, and the friction force between the electric wire and the contact surface is effectively reduced. According to the structure, the static friction coefficient between the electric wire and the supporting structure such as the ground and the guide wheel is remarkably reduced, the adhesion effect is reduced, the electric wire can slide more smoothly, traction resistance increase or wire body damage caused by excessive friction is avoided, and the electric wire is helped to be separated from an obstacle or a bending point more easily.

The invention relates to the technical field of special plastics, in particular to a low-friction-coefficient plastic, a production process and a low-friction-coefficient plastic product, the low-friction-coefficient plastic comprises the following components in parts by weight: 100 parts of a matrix resin system, and the matrix resin system comprises 70-90 parts of polypropylene; 10 to 30 parts of an ethylene-propylene copolymer; 3 to 10 parts of functional microcapsules; 4-12 parts of an interface regulation and control system; according to the low-friction-coefficient plastic, the static friction coefficient is smaller than or equal to 0.10, the dynamic friction coefficient is smaller than or equal to 0.08, meanwhile, the extremely low atomization value is kept to be smaller than or equal to 1.5%, and the extremely low atomization value (smaller than or equal to 1.5%) and the high glossiness retention rate (larger than or equal to 95%) are kept while the low-friction-coefficient plastic obtains excellent friction performance (the static friction coefficient is smaller than or equal to 0.10, and the dynamic friction coefficient is smaller than or equal to 0.08).

To provide an electronic component mounting substrate which is excellent in adhesion and scratch resistance, and which is, after machining, provided with a fall prevention layer increasing the smoothness of component corner portions so as to firmly cover the substrate and an electronic component on the substrate thereby preventing a person's fingernail or another component and the mounted electronic component from catching on each other during a process task such as electronic component mounting, and preventing the electronic component from falling from the substrate because of external damage.SOLUTION: The electronic component mounting substrate comprises a substrate, an electronic component, and a fall prevention layer. The fall prevention layer satisfies the following conditions: (1) a static friction coefficient change rate X obtained by the formula 1, X=(μk300-μk100) / μk100×100), is from -50% to 200% inclusive; and (2) an exponent Y obtained by the formula 2, Y=R2 / (R1+A1), is from 0.8 to 20.0 inclusive.SELECTED DRAWING: Figure 1

The invention discloses a slow-start pneumatic switch valve device for trichlorosilane feeding, and belongs to the technical field of material preparation process valves. Comprising a switch valve and a pneumatic actuator, linear motion of a piston rod is converted into rotation fine adjustment through a swing arm rotation compensation mechanism, a solid / microgroove sealing ring and a sliding cavity wall are always kept on a theoretical contact line, abrasion microgaps are automatically compensated, zero-clearance sliding in the whole life cycle is achieved, and manual clearance adjustment is avoided; the solid sealing ring adopts surface-surface contact, so that the unit pressure is reduced by more than 50%, and the wear rate is obviously reduced; the omega-shaped groove of the microgroove sealing ring converts solid particles (10-50 microns Si) into groove edge elastic sealing, and the wear rate is reduced by 40% again; a sealing surface is provided with a uniform oil film, the dynamic and static friction coefficient difference is reduced, crawling / jumping in a 0-20% opening low-speed stage is eliminated, true slow starting is achieved, the water hammer effect during trichlorosilane feeding is avoided, the sealing surface is provided with the uniform oil film, the dynamic and static friction coefficient difference is reduced, and crawling / jumping in the 0-20% opening low-speed stage is eliminated.

The invention discloses a super-precision spring performance monitoring method and system, and relates to the technical field of precision manufacturing, and the method comprises the steps: determining the static friction state of a contact surface between a super-precision spring and a supporting clamp after a compression force is applied to the super-precision spring; if the static friction state is that the contact surface of the clamp is lubricated abnormally, interface friction dissipation and spring body energy dissipation are calculated after axial circulation loading is executed on the super-precision spring; after the axial cyclic loading is paused and the compression force is applied again, a static friction coefficient is obtained; according to the interface friction dissipation, the spring body energy dissipation and the static friction coefficient, performance detection is conducted, and a performance detection result is obtained. According to the invention, the performance monitoring of the super-precision spring is realized, and the accuracy is improved.

Provided is a composite semipermeable membrane having excellent friction resistance and good water permeability. This composite semipermeable membrane is provided with a support membrane, a separation function layer comprising a crosslinked polyamide, and a coating layer disposed on the separation function layer, the spread area ratio Sdr of the coating layer-side surface being 60-200%, and the static friction coefficient [mu] s of the coating layer-side surface with respect to a polishing membrane abrasive having a particle size # 2000 being 0.40-1.30.

This application discloses an intelligent friction coefficient measurement system, method, electronic device, and storage medium, relating to the field of friction coefficient measurement. The system includes an intelligent traction trolley, a detection block of known weight, a traction rope, a tension sensor, and an image acquisition device. The intelligent traction trolley includes a vehicle body, a main control module, a drive motor, and a human-machine interface module. The intelligent traction trolley moves at a constant speed via the drive motor, causing the detection block to move synchronously. The tension sensor measures the tension in real time, and the image acquisition device acquires images of the target to determine the spatial attitude parameters of the traction rope. The main control module calculates the actual effective tension based on the spatial attitude parameters and the tension signal, and then calculates and displays the maximum static and dynamic friction coefficients in conjunction with the weight of the detection block. This solves the problems of insufficient measurement accuracy, poor operational stability, and errors caused by the attitude of the traction rope in existing technologies, achieving automated, high-precision intelligent measurement.

The present invention provides a fixing device capable of suppressing the displacement of a sliding member that comes into contact with a rotating fixing belt at the fixing nip section. [Solution] The fixing device 8 comprises a fixing belt 81, a sliding member 85, a nip forming member 84, and a pressure roller 82. The sliding member 85 is sheet-shaped and is positioned adjacent to the radially inner side of the fixing belt 81, with the inner circumferential surface of the rotating fixing belt 81 sliding into contact with it. The nip forming member 84 is positioned radially inner of the fixing belt 81, with the sliding member 85 sandwiched between it and the inner circumferential surface of the fixing belt 81. The static friction coefficient between the sliding member 85 and the nip forming member 84 is 0.3 or more.

To provide heat-sealable paper that reduces environmental impact, is easy to open, and is resistant to tearing during opening, as well as rolls, packaging bags, and packaging bodies made using the heat-sealable paper. [Solution] A heat-sealable paper having a heat-seal layer on one side of a paper substrate, wherein the paper substrate content in the heat-sealable paper is 50% by mass or more, and the geometric mean of the pure bending stiffness in the longitudinal direction and the pure bending stiffness in the transverse direction of the heat-sealable paper is 0.80 g·cm 2 A heat-sealable paper having a length of 1.8 kN / m or less, a longitudinal tensile strength of 1.8 kN / m or more, and a static friction coefficient of 0.750 or less on the side of the heat-sealable layer opposite to the paper substrate.

Anti-slip components are made from a polymeric composition that comprises a fluoroelastomer doped with a transition metal ceramic. The fluoroelastomer has excellent chemical resistance and thermal resistance, and the transition metal ceramic increases the static coefficient of friction for the polymeric composition. The anti-slip components are especially suitable for material handling systems that may be exposed to harsh environments in a photolithographic patterning system.

The application is suitable for the technical field of machine tool combination assembly, and provides a micro contact joint surface static friction coefficient calculation method, which comprises the following steps: obtaining joint surface characteristic parameters; based on fractal theory and elastic theory, constructing base additional deformation and micro convex body normal deformation equation, through micro stress analysis, establishing single micro convex body deformation geometric parameters; considering three deformation stages of micro convex body, obtaining joint surface contact area and contact load; using modified island distribution function to integrate joint surface real contact area and contact load in different deformation stages, obtaining joint surface real contact area and contact load; considering the influence of static friction coefficient on contact surface characteristics, establishing joint surface static friction coefficient model. The application establishes surface static friction coefficient model from the micro contact angle, and simultaneously considers the interaction of micro convex body and base and three stages of material elastic, elastic-plastic and complete plastic deformation.

An item of protective apparel comprising: first and second components (41, 42) that are configured to move relative to one another; and a sliding interface provided between the first and second components; wherein the sliding interface comprises first and second surfaces (41, 42) that oppose one another and are configured to slide relative to each other; the first surface has at least a first region (45) which is divided into at least first and second areas (47, 48) that are configured such that at least one of the static coefficient of friction and the dynamic coefficient of friction for the first area against the second surface is different from the second area against the second surface; the first surface has a second region configured such that the static and / or dynamic coefficient of friction of the first surface against the second surface is different in the first region from the second region (46); the second region is divided into at least first and second areas (49, 50) that are configured such that at least one of the static coefficient of friction and the dynamic coefficient of friction for the first area against the second surface is different from the second area against the second surface; and the arrangement of the first and second areas in the first region is different from the arrangement of the first and second areas in the second region.

The imitation pilose leather sheet involved in the embodiment includes: a fibrous substrate composed of a textile or a knitted fabric; and a mixture applied to the fibrous substrate and containing a silicone resin and a polyurethane resin. The imitation pilose leather sheet is configured such that a pilose surface having pilose hairs is provided on the surface of the sheet, and the pilose hairs are composed of the fibers constituting the textile or the knitted fabric and the above mixture is attached thereto. The length of the pilose hairs is 200 to 500 μm, and the static friction coefficient when the pilose surfaces are rubbed against each other is 0.660 to 1.300.

A fiber for hair having a base fiber and an oil component present on at least a portion of the surface of the base fiber, the fiber for hair having a dynamic friction coefficient [mu] k of 0.25 or more and a difference [mu] s-[mu] k between a static friction coefficient [mu] s and the dynamic friction coefficient [mu] k of 0-0.05.

The invention provides a sucker-based adsorption detection simulation method and related equipment, the sucker is used for adsorbing and lifting a case, the case comprises a shell, the shell comprises a heat dissipation area with heat dissipation holes and a non-heat dissipation area adjacent to the heat dissipation holes, and the sucker is adsorbed to the non-heat dissipation area; the method comprises the steps that characteristic physical parameters of the suction cup are obtained, and the characteristic physical parameters at least comprise the size of the suction cup, the standard adsorption force of the suction cup and the static friction coefficient between the suction cup and the non-heat-dissipation area; the force safety coefficient of the suction cup is calculated according to the characteristic physical parameters, and the force safety coefficient is used for representing the size relation between the maximum static friction force borne by the suction cup when the suction cup is adsorbed to the non-heat-dissipation area and the gravity of the case; and obtaining an adsorption detection result of the suction cup according to the force safety coefficient. Whether the suction cup can suck and lift the case or not can be automatically detected, so that the working efficiency is improved.

The invention relates to a film forming apparatus and a conveying method. The film forming apparatus includes a conveying unit configured to convey a substrate and a film forming unit configured to apply a Li metal in a vacuum to a film forming region of the substrate conveyed by the conveying unit. The conveying unit includes a plurality of rollers. At least one of the plurality of rollers is a wrinkle-preventing roller. The static friction coefficient between the wrinkle-preventing roller and the Li metal, measured under an atmosphere having a dew point of -40°C or less, is greater than 0.50 and equal to or less than 2.50. The elastic modulus of the surface of the wrinkle-preventing roller is 2.5 GPa or less. The surface of the wrinkle-preventing roller is made of polypropylene.

This utility model discloses an anti-slip knitted fabric, relating to fabric technology. The key technical points are: it includes a surface layer and a bottom layer; the bottom layer has several pleats; the surface layer has raised strips; and the bottom layer has anti-slip strips. The anti-slip strips increase the maximum static friction between the bottom layer and the mattress, reducing the possibility of relative sliding. The pleats, by changing the surface roughness of the bottom layer, also increase the maximum static friction coefficient between the bottom layer and the mattress, further reducing the possibility of relative sliding. The use of GB1 and GB2 combed yarns, made from modal fibers twisted together, ensures the moisture absorption capacity of the surface layer, guaranteeing its comfort.

Provided is an electronic component mounting substrate that is excellent in adhesion and scratch resistance, is provided, after machining, with a fall prevention layer increasing the smoothness of component corner portions, firmly covers a substrate and an electronic component on the substrate so as to prevent a person's fingernail or another component and the mounted electronic component from catching on each other during a process task such as electronic component mounting, and prevents the electronic component from falling from the substrate due to external damage. The electronic component mounting substrate according to the present disclosure comprises a substrate, an electronic component, and a fall prevention layer. The fall prevention layer that satisfies: (1) a static friction coefficient change rate X of -50% to 200% as obtained using equation 1; and (2) an exponent Y of 0.8 to 20.0 as obtained using equation 2. Equation 1: X = (μk300-μk100) / μk100×100 Equation 2: Y = R2 / (R1+A1)

The utility model discloses an engineering seat anti-skid wear-resistant seat surface material, which comprises an anti-skid layer, an enhancement layer, a shock absorption layer and an absorption layer, the upper surface of the anti-skid layer is provided with a bionic shark layer structure, the shock absorption layer is internally provided with a plurality of elastic pieces, the shock absorption layer is internally filled with magnetorheological fluid, the absorption layer is internally provided with a silica gel honeycomb block, and the silica gel honeycomb block is filled with a plurality of elastic pieces. A reinforcing band is arranged in the absorbing layer, and the reinforcing band is filled with polyurethane foam. According to the device, the stability of the static friction coefficient is improved by arranging the bionic shark layer structure, the surface is durable and wear-resistant, scratches and fuzzing are reduced, and by means of hexagonal elastic deformation when the silica gel honeycomb block is pressed, the viscosity of magnetorheological fluid, damping vibration of polyurethane foam in the reinforcing band through a closed-cell structure, elastic deformation of an elastic piece and deformation of an air capsule, the stability of the static friction coefficient is improved. A multi-stage damping mechanism is formed to absorb vibration, local pressure can be dispersed to the whole absorption layer, and the excellent compression resilience performance is achieved.

To suppress the occurrence of wrinkles even when transporting a substrate having a Li metal surface under vacuum.SOLUTION: A roller for transporting a substrate having a Li metal layer is provided, wherein a static friction coefficient with Li metal is 2.50 or less, and a Young's modulus of the surface is 2.5 GPa or less.SELECTED DRAWING: Figure 1

The invention relates to the technical field of friction coefficient testing, and provides a metal material high-temperature friction coefficient testing device which comprises a motion control system, a motion platform assembly, a heating system and a measuring system. The test piece made of a metal material and the sliding block are arranged on the motion platform assembly, and the sliding block is placed on the test piece; the heating system is used for heating and preserving heat of a test piece and a sliding block which are arranged on the motion platform assembly; the motion control system drives the motion platform assembly to drive the test piece to slide, so that the test piece slides relative to the sliding block; when the test piece and the sliding block slide relatively, the measuring system monitors data of force generated by the sliding block in real time through the force sensor, records a time-domain curve of the data and calculates the friction coefficient according to the time-domain curve. According to the scheme of the invention, the method can meet the temperature requirement of a metal material use environment, and can measure the static friction coefficient and the dynamic friction coefficient of the metal material in a high-temperature state.

The application discloses a robot friction parameter identification method and device, a terminal and a medium. The method comprises the following steps: acquiring a dynamic speed threshold of a robot joint; identifying a static friction coefficient, a coulomb friction coefficient and a critical speed in a low-speed section where the speed of the robot joint is lower than the dynamic speed threshold; and identifying a viscous friction coefficient in a medium-high speed section where the speed of the robot joint is higher than the dynamic speed threshold, in combination with the obtained static friction coefficient, the coulomb friction coefficient and the critical speed. The application has the advantage that higher-precision robot friction parameters can be obtained, thereby facilitating the construction of a high-precision robot friction model.

This invention provides a safety verification method for clamping battery cell modules into a box. The safety verification method includes the following steps: Step 1, determining the clamping force F of the clamp. 夹 A static friction test bench was built, and the static friction between the urethane block and the blue film was tested and analyzed on the test bench to determine the clamping force F of the fixture. 夹 Step 2: Determine the cumulative relative displacement ΔL of the battery cells in the module in the Z direction. 总 This safety verification method determines the minimum reliable clamping force in the Y direction by studying the static friction coefficient of the clamp on the side of the module; and determines the maximum cumulative relative displacement of the battery cell in the Z direction by studying the deformation curve of the relationship between ΔLmax and τ of the double-sided adhesive foam. This provides data support for the design of the module clamping and boxing tooling, ensuring the reliability of the clamp for module handling when the battery cell module is clamped and boxed.

To provide building material components that have a desirable tactile feel. [Solution] A building material component having a coating film formed on at least a part of its surface, wherein the coating film has an arithmetic mean surface roughness Ra of 1.0 or more and 8.5 μm or less, a maximum surface height roughness Rz of 6.0 or more and 45.0 μm or less, a static friction coefficient of 0.81 or more and 0.92 or less, and a dynamic friction coefficient of 0.36 or more and 0.46 or less.

Provided is a multifilament in which: modified cross-section fibers having different cross-sectional shapes are dispersed and mixed; the fibers have 3 to 20 recesses continuous in a fiber axis direction; and the ratio of the maximum depth of the recesses between the fibers is 1.1 to 5.0. The multifilament is configured so that: composite fibers having different composite cross-sections are dispersed and mixed; the fibers are composed of a hardly-eluting component and an easily-eluting component; the hardly-eluting component of the fibers has 3 to 20 recesses continuous in a fiber axis direction; and a ratio of the maximum depth of the recesses of the hardly-eluting component between the fibers is 1.1 to 5.0. Further provided is a woven / knit fabric comprising a multifilament in which modified cross-section fibers having different cross-sectional shapes are dispersed and mixed, said fabric having a static friction coefficient of a fabric surface of 0.5 to 2.0, and a variation of a dynamic friction coefficient of 1.0×10-2 to 5.0×10-2.　Provided are the multifilament, the woven / knit fabric, and a fiber product which are suitable for comfortable clothing, in which patches of unevenness can be formed on the fabric surface and patches of voids can be formed inside the fabric, which have a mild gloss with a squeaky and luxurious feeling peculiar to silk, and which also have functionality such as water absorbing and diffusing properties.

Provided is a composite semipermeable membrane including: a support membrane; a separation functional layer containing a crosslinked polyamide disposed on the support membrane; and a coating layer disposed on the separation functional layer, in which a developed area ratio Sdr of a coating layer-side surface of the composite semipermeable membrane is 60% to 200%, and a static friction coefficient us between the coating layer-side surface of the composite semipermeable membrane and a lapping film abrasive having a particle size of #2000 is 0.40 to 1.30.

The present application provides a laminate capable of achieving excellent slidability regardless of whether or not a user's finger is wetted with water, an optical member with the laminate, and an image display device. The laminate of the embodiment of the present application has a substrate and a functional layer disposed on one side in the thickness direction of the substrate, and the static friction coefficient and the kinetic friction coefficient of the functional layer surface measured using a contact wetted with water are both 0.13 or less in a specific friction test based on a Bowden method of surface contact.

To provide a cleaning device that can uniformly and efficiently remove dirt attached to a rotating body, and can prevent the occurrence of abnormal images including mainly vertical black streaks over a long period.SOLUTION: A cleaning device has cleaning means 22b that is in contact with a surface of a rotating body 22a to clean the surface of the rotating body 22a. The cleaning means 22b is a roller member and has a foam layer 224 in contact with the surface of the rotating body 22a, and the surface of the foam layer 224 has a coefficient of static friction of 0.5 or more, which is measured by the Euler belt method.SELECTED DRAWING: Figure 4