31 results about "Friction coefficient" patented technology

The invention provides a self-adaptive grabbing system and method based on photoelectric sensing and material recognition. The system comprises a manipulator, a mechanical arm, a front-end processor and an upper computer controller. The manipulator is driven by a torque-adjustable motor, and an optical sensor module based on a photoelectric sensing principle is mounted on a fingertip of the manipulator; the optical sensor module is used for acquiring a texture grayscale image and sliding micro-displacement information of the surface of a grabbed object; the front-end processor is used for collecting data of the optical sensor module and transmitting the data to the upper computer controller; the upper computer controller recognizes the material of the object and matches the friction coefficient, the optimal clamping force increment is calculated according to the sliding micro-displacement information and the friction coefficient, and the motor is controlled to achieve self-adaptive grabbing. According to the system, the manipulator can be controlled to increase the clamping force in an optimal clamping force increment mode according to the sliding amplitude and the friction characteristic of the object, and self-adaptive stable grabbing of the object is achieved.

This invention discloses a method for obtaining the strength of a pillar considering friction factors, comprising: preparing rock samples with different aspect ratios and configuring contact surface materials with different tribological properties; determining the cohesion and friction coefficient of each contact surface material through shear testing, conducting compressive strength tests on rock samples with different contact surface materials to obtain rock sample strength data under different friction levels and aspect ratios; selecting a pillar strength calculation formula corresponding to the actual contact conditions between the pillar and the surrounding rock, calculating the strength of the target pillar under design conditions, and calculating the load on the pillar itself based on the pillar area bearing theory; calculating the pillar safety factor based on the pillar strength and the load, and optimizing the pillar design accordingly.

A colorimetry device includes a support base having a support surface for supporting a measurement target and a carriage to which a colorimeter is detachably attached and that is configured to move in a first direction, which is a direction along the support surface, and in a second direction, which is a direction along the support surface and which intersects the first direction, the colorimeter being configured to measure color of the measurement target, wherein the carriage includes, on an inner wall of an accommodation section that accommodates the colorimeter, a contact surface that is in contact with a side surface of the colorimeter when the colorimeter is attached or detached and a friction coefficient μ1 between the contact surface and the side surface of the colorimeter is smaller than a friction coefficient μ2 between the housing of the carriage and the side surface of the colorimeter.

Disclosed are a friction and wear test system and a friction and wear test method. To reduce the error of measured friction coefficients, the friction and wear test system of the present disclosure includes a rotating shaft, a dynamic specimen mounting structure mounted on the rotating shaft, a first static specimen mounting structure, a first loading module for applying a preset loading force to the first static specimen during the test, and a second static specimen mounting structure arranged directly opposite to the first static specimen mounting structure in the axial direction of the rotating shaft. The second static specimen mounting structure is configured with a second loading module for applying a preset loading force pointing at the dynamic specimen to the second static specimen during the test, so as to at least partially counterbalance the force loaded on the dynamic specimen by the first static specimen during the test.

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 invention discloses a carrying system and photovoltaic preparation equipment. The carrying system comprises a manipulator, a detection module and a control module. The mechanical arm comprises a bearing part, the bearing part is provided with an open end, a closed end and a limiting piece, the open end and the closed end are oppositely arranged, and when a to-be-carried object is fed, the to-be-carried object enters the bearing part through the open end till making contact with the limiting piece; the first driving part drives the bearing part to move from the carrying starting point to the carrying ending point, so that the bearing part has displacement in the horizontal direction; the second driving part drives the bearing part to rotate around a rotating shaft, and the rotating shaft is perpendicular to the open end and / or the closed end; the detection device detects the acceleration of the to-be-carried object relative to the bearing part; the control module controls the first driving part and controls the second driving part according to the acceleration of the to-be-carried object relative to the bearing part, the mass of the to-be-carried object and the friction coefficient between the to-be-carried object and the contact face of the bearing part, so that the to-be-carried object slides reversely and returns to the position where the to-be-carried object makes contact with the limiting piece during feeding. The carrying efficiency is improved, and the position accuracy is improved.

The invention relates to the technical field of profile rolling, and particularly discloses a flat-rolling ultrathin aluminum alloy profile rolling device which comprises rolling racks, and a profile pretreatment unit is fixedly arranged between the front faces of the two rolling racks through bolts; sectional material rolling units are symmetrically arranged on the upper portion and the lower portion between the two rolling racks, and auxiliary supporting assemblies are arranged on the two sectional material rolling units. Through the composite structure design of the working roller, the rolling quality is improved from three aspects: the flat roller and the convexity roller are adapted to the thickness control requirements of profiles with different widths; the nano ceramic coating strengthens the wear resistance of the roller surface; by means of the micro-nano rib and pit structure, on one hand, the contact area of the roller and the profile is reduced, the friction coefficient is reduced, drawing marks or wrinkles of the profile are avoided, and on the other hand, the pits are used for storing lubricating oil and containing aluminum skimmings to protect the surface of the profile. And meanwhile, the servo electric cylinder is matched with the adjusting frame, so that the distance between the rollers can be accurately adjusted to adapt to rolling of profiles with different thicknesses, and the rolling precision is guaranteed.

The application discloses spliced self-lubricating polyether ether ketone three-layer composite plate and a preparation method thereof. The spliced self-lubricating polyether ether ketone three-layer composite plate comprises, from bottom to top, a metal base layer, a copper powder layer and a spliced self-lubricating layer connected in sequence. The spliced self-lubricating layer is composed of a plurality of wear-resistant PEEK pieces with good wear resistance and friction-reducing PEEK pieces with good friction-reducing performance arranged alternately. The friction-reducing PEEK pieces are designed to be arranged at an angle of 30-60 degrees with the horizontal direction, i.e. the friction-reducing PEEK pieces are arranged in an inclined strip shape between the wear-resistant PEEK pieces with good wear resistance. The structure design can form a complete self-lubricating friction-reducing layer during reciprocating movement of the composite plate, reduces the friction coefficient of the plate and a friction pair, and finally improves the wear resistance of the material.

The present application relates to the technical field of decompression products, and in particular to a decompression ring and a method for determining the thickness of self-lubricating material thereof. The method comprises the following steps: determining the surface material of the fixed inner ring or the movable outer ring made of non-self-lubricating material; determining the friction coefficient between the self-lubricating material and the surface material; determining the dialing pressure, the dialing frequency and the expected service life according to historical user data; determining the wear rate according to the friction coefficient and the dialing pressure; determining the number of rotations according to the dialing frequency and the expected service life, and then determining the calculated thickness according to the number of rotations and the wear rate; obtaining the expected thickness, and determining the reference thickness according to the expected thickness and the calculated thickness; adjusting the reference thickness according to the gap between the self-lubricating material and the fixed inner ring or the movable outer ring and the user experience threshold, and determining the final thickness. The present application can reduce the size of the decompression ring while ensuring its service life and improving user experience.

The application discloses a sliding vane, a compressor and a processing technology of the sliding vane. The sliding vane comprises a body; and a roller mounting groove is arranged on the body, wherein the roller mounting groove is provided with an inner concave curved surface which is adapted to the roller, the inner concave curved surface is an optimal arc curved surface, and the opening of the inner concave curved surface is outward and upward. The roller mounting groove is designed in a targeted manner, the optimal arc is greater than one-half of a circle, and the opening direction is inclined at a certain angle, so that the relative position of the roller is fixed, the roller does not deviate and does not fall out during the operation of the compressor, the roller can be better accommodated and fixed, the sealing performance of the compressor during the operation is improved, the friction coefficient between the sliding vane and the piston roller is reduced, and the energy efficiency ratio is improved.

The method for evaluating the fracture mechanics performance of the water-soaked brittle solid material of the present application comprises the following steps: 1. A group of cuboid brittle solid material samples are prepared, and the samples are immersed in water. After the immersion is completed, the samples with different immersion times are selected for weighing, and then the samples with different water contents are selected; 2. The samples with different water contents in step 1 are selected, and the relationship curve between the uniaxial compression stress and strain of the brittle solid material samples and the initial density of the micro-defects of the samples under different water contents are measured; 3. The samples with different water contents in step 1 are selected, and the sliding friction coefficients of the brittle solid material samples with different water contents are determined; 4. The brittle solid samples containing cracks are prepared, and the fracture toughness of the brittle solid material with different water contents is measured; and 5. Based on the above steps, the fracture strength of the brittle solid material samples under the action of different water contents after being soaked in water is determined.

1. The name of the design product: friction coefficient instrument. 2. The use of the design product: the design product is used for the surface slipperiness and friction performance quality control of materials such as packaging, paint, paper, textile, rubber, plastic and metal. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. Other circumstances that need to be explained: A part is transparent material.

To provide a carrying device capable of detecting a change in a surface state of a roller used for carrying a carrying object, even when the carrying object is long.SOLUTION: The platen roller 15 conveys the stencil sheet M while sandwiching the stencil sheet M between the platen roller 15 and the thermal head 13. The platen roller 15 can be brought into contact with and separated from the thermal head 13. The driven roller 17 is driven to rotate by the platen roller 15. The torque limiter 21 applies a predetermined load to the driven roller 17. The encoder 22 detects the rotation speed of the driven roller 17. The control unit drives the platen roller 15 in a state in which the platen roller 15 is separated from the thermal head 13, detects the friction coefficient of the platen roller 15 based on the rotation speed of the driven roller 17, to which the predetermined load is applied by the torque limiter 21, detected by the encoder 22, and determines the change in the state of the surface of the platen roller 15 based on the detected friction coefficient.SELECTED DRAWING: Figure 2

The application discloses a robot clamp grabbing optimization method and device, a terminal and a medium. The technical scheme provided by the application first determines the model and data of a workpiece to be grabbed through an image of the workpiece to be grabbed, utilizes a preset workpiece recognition model, wherein the workpiece data includes geometric structure parameters, surface material, weight and barycentric position, then determines the surface friction coefficient of the workpiece to be grabbed according to the surface material in the workpiece data, determines the target clamping force according to the surface friction coefficient and the weight, and combines a preset clamping force constraint relationship, determines the target clamping force according to the surface friction coefficient and the weight, combines a preset clamping force constraint relationship, determines the target clamping force, determines the target grabbing point in the workpiece to be grabbed according to the geometric structure parameters and the barycentric position, and finally generates a clamp control instruction according to the calculated optimal grabbing parameter, so that the target clamp grabs the workpiece to be grabbed according to the clamp control instruction, thereby improving the accuracy and stability of grabbing and improving the success rate of grabbing.

The invention relates to a surrounding rock and lining interface friction coefficient valuing method for engineering analysis, and belongs to the technical field of tunnel engineering. The method aims at solving the technical problems that an existing indoor direct shear test is limited in test object, poor in result practicability and time-consuming and labor-consuming in the process. According to the technical scheme, the method comprises the steps of drilling a rock sample from an engineering site, carrying out a concrete mix proportion test, quantifying the roughness of the rock sample through image processing and height measurement, carrying out a friction experiment to obtain a friction coefficient, and establishing a polynomial fitting equation of the roughness and the friction coefficient; and finally substituting the average roughness of the field surrounding rock into the equation to obtain the friction coefficient under the engineering scale. The method has the advantages that the pertinence is high, the operation is simple and convenient, the precision meets the engineering requirements, and the efficiency and the practicability of the friction coefficient value are effectively improved.

The invention provides a pile foundation side friction coefficient obtaining method combined with a lateral pressure test. The pile foundation side friction coefficient obtaining method comprises the following steps that S1, lateral soil pressure stress calibration based on the lateral pressure test is conducted; s2, pile pulling test and real-time monitoring of lateral soil pressure stress in a calibration position guide hole; s3, analyzing a lateral soil pressure stress continuous function in a calibration position guide hole in the pile pulling test process; s4, the pile foundation side pressure stress is mapped in real time in the pile pulling test process; and S5, solving a side friction coefficient. The pile side pressure stress is indirectly measured, the technical problem that the pile side pressure stress of irregular side wall pile types such as cast-in-place piles cannot be directly and accurately measured in the pile pulling process is successfully solved, and fine testing of the pile side friction coefficient of the pile foundations of the type becomes possible; according to the method, the pile side frictional resistance energy dissipation work is constructed by adopting the double integral of the product of the pile side pressure stress, the frictional resistance coefficient and the action area on the depth and the time for the first time, a pile side pressure stress continuous mapping function is fully utilized, and fine solving of the frictional resistance coefficient is guaranteed.

A method for forming a surface having anisotropic friction properties by numerically controlled milling is disclosed. [Solution] In this method, machining simulations of milling are performed for combinations of multiple tool orientation parameters, and a height matrix is ​​constructed from the obtained three-dimensional point cloud data. Then, the contact region is extracted, the surface gradient and gradient amplitude values ​​are calculated, and the sets of gradient amplitude values ​​at the contact leading edge during forward and reverse sliding are extracted. Furthermore, the coefficient of friction for forward and reverse sliding is calculated, and an anisotropy evaluation index is calculated based on these. In addition, an anisotropy evaluation index heat map is created, and a ridge line indicating the direction of sensitivity to changes in the anisotropy evaluation index is generated, thereby enabling quantitative prediction and evaluation of the surface friction behavior. This makes it possible to inversely calculate tool orientation parameters under predetermined cutting parameters based on the anisotropy requirements related to the surface micromorphology. By performing milling according to the parameter combination obtained by this method and predetermined cutting parameters, a viscoelastic material workpiece that satisfies the requirements for friction characteristics or sealing function according to the sliding direction can be obtained. The present invention is useful in satisfying the requirements for friction characteristics and sealing function according to the sliding direction in a seal pair.

The invention discloses a method for solving stamping cracking of a galvanized fingerprint-resistant plate, which is characterized in that the mean value of reciprocating dynamic friction coefficients for 30 times during coating is less than 0.10, and meanwhile, the film thickness is controlled to be 1.0-1.3 mu m. The invention aims to provide the method for solving the stamping cracking of the galvanized fingerprint-resistant plate, so as to ensure that the fingerprint-resistant passivation coating is not subjected to embrittlement and falling in the stamping deformation process.

This utility model belongs to the field of spray painting technology, specifically a spray painting platform for omnidirectional workpiece rotation. It includes a clamping block, a first cylinder fixedly connected to the bottom of the clamping block, and a push block fixedly connected to the output end of the first cylinder; a limit groove is formed on the top of the push block; a movable chuck is rotatably connected inside the clamping block; a roller is rotatably connected to the end of the movable chuck; a movable clamping plate is fixedly connected to the side wall of the movable chuck; a fixed clamping plate is fixedly connected to the side wall of the clamping block; a second cylinder is provided on the side wall of the clamping block; and a column is fixedly connected to the side wall of the second cylinder. This utility model uses a first cylinder to drive the push block, causing the movable clamping plate and the fixed clamping plate to clamp the workpiece to be painted. The limit groove and roller reduce the friction coefficient between components, and the second cylinder allows the position of the clamping block to be adjusted, enhancing the flexibility and practicality of the platform.

The application belongs to the technical field of glass manufacturing, and particularly relates to a glass original sheet storing and taking equipment and a storing and taking method, which solves the problems of low efficiency and easy damage in the prior art, and comprises a sheet arranging machine, one side of the sheet arranging machine is provided with an extraction machine for extracting the glass original sheet, the sheet arranging machine is composed of a base, the middle part of the base is provided with an extraction assembly for feeding out the glass original sheet, through the arrangement of the extraction assembly and a moving assembly, the first transmission gear driven by the servo motor in the extraction frame drives the friction conveying shaft to rotate, the high-friction coefficient material is used to realize the fast and stable feeding out of the original sheet; the transmission motor in the moving assembly drives the long shaft to rotate through the double-row heavy-load transmission chain, the storage assembly is accurately positioned through the closed-loop conveying chain, and the inclined guide structure of the extraction frame is matched, so that the single glass original sheet storing and taking cycle is shortened, and the continuous operation capacity of the equipment is enhanced.

A shaft shoulder bolt of an anti-loose structure comprises a first screw rod and a second screw rod which are coaxially arranged and a shaft shoulder arranged between the first screw rod and the second screw rod, the shaft shoulder comprises an anti-loose flange part and a polygonal driving part, and a plurality of radial anti-skid friction protrusions are arranged on the end face of the side, facing the first screw rod, of the anti-loose flange part in an equally-divided mode around the axis. The anti-skid friction protrusions are arranged to be a plurality of through grooves penetrating through the anti-loose flange part in the axial direction, a threaded shaft part is arranged between the anti-loose flange part and the polygonal driving part, and the diameter of the threaded shaft part is larger than the radial size of the polygonal driving part. By means of the improvement, the problem that the anti-skid friction protrusions are abraded and fail after being used for a long time is solved, the shaft shoulder bolt does not need to be disassembled and replaced, the pressing nut does not need to be further screwed during maintenance, the anti-loose rubber body can be driven to further move, gaps caused by abrasion are filled, and the friction coefficient between the anti-loose rubber body and the surface of a fixed object is recovered.

The utility model discloses a device for measuring the sliding friction coefficient of a wheel. The device comprises a bottom plate, a sliding seat, a sliding plate, a sliding block and a moving mechanism, the sliding seat is arranged at one end of the bottom plate, the moving mechanism is arranged at the other end of the bottom plate, one end of the sliding plate penetrates through the sliding seat in a sliding mode, the other end of the sliding plate is hinged to the sliding block, and the moving mechanism is sleeved with the sliding block. A friction base material is arranged on the surface of the sliding plate, and the sliding plate is in an inclined state. Compared with the prior art, the device provided by the utility model is simple, convenient and effective to operate.

A treadmill includes a walking board assembly, and a walking belt encircling the walking board assembly. The walking board assembly includes a support plate, a wear-resistant plate mounted on the support plate, and a wax layer mounted on the wear-resistant plate. The wear-resistant plate is made of wear-resistant material with a low friction coefficient. The wear-resistant plate has a bottom face abutting a top face of the support plate. The wear-resistant plate has a top face integrally formed with multiple grooves. The wear-resistant plate has a thickness less than that of the support plate. The wax layer is coated on and filled with the grooves of the wear-resistant plate. The wax layer has a coating height at least equal to a depth of each of the grooves.

A method for estimating a coefficient of friction for a surface relative to one or more tires in contact with the surface, the one or more tires mounted on a vehicle, is disclosed herein. One or more models may be selectively retrieved from data storage. At least one surface condition may be associated with each of the one or more models. Respective values corresponding to a coefficient of friction of the surface relative to the one or more tires in contact with the surface may be estimated based on at least the one or more models and at least one of the one or more operating events on, and a sensed motion of, at least one of the one or more tires. At least one output signal corresponding to the estimated coefficient of friction may be generated.

This invention discloses a CNC milling method for creating anisotropic frictional surfaces. Through milling simulation under various tool attitude parameters, the method involves meshing surface data, extracting contact areas, calculating surface gradients and gradient magnitudes, extracting gradient magnitude sets of forward and reverse sliding contact leading edges, calculating forward and reverse sliding friction coefficients, and calculating anisotropic evaluation indices. A heatmap of the anisotropic evaluation indices is then generated, and sensitive directional ridges are created, enabling quantitative prediction and characterization of surface friction behavior. This invention, starting from the anisotropic requirements of the surface microstructure, intelligently reverse-engineers tool attitude parameters based on set cutting parameters. Milling is then performed according to the recommended parameter combinations and set cutting parameters to obtain viscoelastic material workpieces that meet the requirements for directional friction or sealing functions. This invention is of great significance for meeting the requirements of directional friction and sealing functions in sealing pairs.

The application discloses a mountainous highway abandoned slag field instability risk zoning evaluation method, comprising the following steps: establishing a slope model, and dividing the instability process of the mountainous highway abandoned slag slope into stages; respectively establishing the force balance equation of each stage; obtaining the movement distance equation of the abandoned slag sliding body along the ground by using the kinetic energy friction dissipation balance equation; when the sliding friction coefficient of the sliding body and the sliding surface and the sliding friction coefficient of the sliding body and the ground are consistent, respectively taking the maximum value and the minimum value of the sliding friction coefficient to substitute into the movement distance equation of the abandoned slag sliding body along the ground, and obtaining the minimum movement distance and the maximum movement distance of the abandoned slag sliding body along the ground; according to the minimum movement distance and the maximum movement distance of the abandoned slag sliding body along the ground, the high, medium and low danger zoning of the instability risk threat of the abandoned slag slope is carried out; the application is based on the actual abandoned slag project, is carried out under the same force balance relationship, movement equation and energy equation, is simple and easy to implement from calculation to zoning, and has strong operability.

The application provides a casing running friction coefficient calculation method, application, device, equipment and medium, and the method comprises the following steps: acquiring data, including well trajectory parameters, through bottom hole assembly parameters, drilling fluid parameters, through well load data and well depth data; screening data, performing data interpolation on the through bottom hole assembly structure segmentation points, confirming the well depth, well inclination angle and azimuth angle at any position; calculating the dogleg and / or curvature corresponding to the segmentation of the bottom hole assembly structure and the standard drill pipe according to the well depth, well inclination angle and azimuth angle at the any position; confirming the axial load and friction coefficient of each segment, establishing a hook load model, and confirming the hook load; measuring the actual through well hook load data, inverting the optimal comprehensive friction coefficient according to the hook load and the actual through well hook load data; and confirming the casing running friction coefficient according to the optimal comprehensive friction coefficient. The prediction data of the application has high accuracy, and the safety of drilling operation can be improved, and the casing running construction operation can be quickly completed.

The utility model relates to a friction coefficient instrument capable of positioning a sliding block and quickly clamping a sample. The friction coefficient instrument comprises the sliding block arranged on a machine body of the friction coefficient instrument, a plurality of pressing blocks are hinged to the sliding block, magnetic materials A are arranged on the pressing blocks, and magnetic materials B attracted with the magnetic materials A are arranged on the sliding block; the magnetic material A and the magnetic material B attract each other, so that a sample on the sliding block is quickly clamped by the pressing block and the sliding block, and the device is simple, efficient, safe and reliable. The cross-shaped positioner is arranged on the machine body, the output end of the cross-shaped positioner faces the top of the machine body, and the placement position of the sliding block is positioned through the cross-shaped positioner, so that the placement position of the sliding block is prevented from influencing test data. According to the utility model, the accurate positioning of the sample on the slide block can be realized, and the rapid clamping of the sample can be realized.

The invention provides a method for acquiring a side friction coefficient of an uplift pile. The method comprises the following steps: S1, pile pulling test and real-time data monitoring; s2, analyzing a pile side pressure stress continuous function; s3, solving a side friction coefficient of the uplift pile foundation; and S4, researching a side friction coefficient size effect. According to the method, a precise pile side pressure stress function obtained by an in-situ test is fully utilized, and the pile side friction resistance energy dissipation work is constructed by adopting the double integral of the product of the pile side pressure stress, the friction resistance coefficient and the action area on the depth and time for the first time, so that the fine solution of the friction resistance coefficient can be ensured; according to the method, the influence of the pile foundation size on the pile side frictional resistance coefficient is considered, the pile foundations with different pile diameters are adopted to carry out uplift pile foundation side frictional resistance coefficient testing, and a way is provided for contrastively analyzing the influence rule of the pile diameter size on the pile side frictional resistance coefficient and establishing the quantitative relation between the pile side frictional resistance coefficient and the pile diameter size.