59results about How to "Moderate coefficient of friction" patented technology

The invention discloses a ceramic-based friction material and a method for preparing the same. The ceramic-based friction material consists of the following raw materials in part by weight: 6 to 8 parts of thermal plasticity phenolic resin or modifier thereof, 7 to 8 parts of potassium titanate whisker, 5 to 6 parts of attapulgite clay, 3 to 4 parts of expanded vermiculite, 4 to 5 parts of butyronitrile rubber powder, 4 to 5 parts of chromite powder, 12 to 13 parts of ceramic fiber, 3 to 4 parts of powdered coke, 14 to 15 parts of barium sulfate, 5 to 6 parts of artificial graphite, 9 to 10 parts of scale graphite, 7 to 8 parts of organic rubbing powder, 3 to 4 parts of sericite, 0.5 to 1 part of aluminum oxide, 3 to 4 parts of copper fiber, 3 to 4 parts of coloring agent and 0.5 to 1 part of organic fiber. The preparation method comprises the following steps of: material blending, cold press moulding, hot press moulding, polishing and curing treatment. The ceramic-based friction material has the advantages of high and stable frictional property, suitable frictional coefficient, low wear rate, low hardness, no damage to friction coupling materials, low braking noise, and extremelylow environmental pollution; and in use, the ceramic-based friction material has the advantages of smooth braking, gentleness, comfortability, safety and reliability.

There is disclosed a member for office machines which comprises a core body and an annular elastic body installed on the peripheral surface thereof, wherein the expansion rate of the annular elastic body E(%) falls within the range of 5 to 30%, when expressed by the formulawherein d1 in mm is the diameter of the core body, or a longest value in the cross-section of the core body in the shape of a roller or odd-shape; and d2 in mm is the inside diameter in mm of the annular elastic body before being installed on the peripheral surface of the core body. The member for office machines enables stable and steady paper sheet feeding, when used as a paper feeding member in electrophotographic equipment and electrostatic recording equipment, and equipment having a variety of paper feeding mechanisms such as ink-jet printers, automatic teller machines (ATM), money exchange machines, counting machines, automatic vending machines and cash dispensers (CD).

An environmental protection type friction material with less metal used for automobile brake block is prepared with the following raw materials in parts by weight: 8-18 parts of modified phenolic resin, 4-14 parts of rubber powder, 0.2-1 part of PPTA-pulp, 0.2-1 part of carbon fiber, 0-4 parts of steel fiber, 10-22 parts of mineral fiber, 16-24 parts of calcined kaolin, 0.1-4 parts of magnesium oxide, 1-9 parts of aluminum oxide, 12-18 parts of barite powder, 2-8 parts of graphite, and 8-16 parts of calcium carbonate, the invention adopts the above technology and has the following advantages:1, the environmental protection friction material with less metal used for the automobile brake block has no asbestos, no sulfide, no copper and no other harmful heavy metal components, which is environmentally friendly; 2. with the co-action of each component, the invention has appropriate friction coefficient, high heat-resistance, low wear rate, low noise, less damage to coupled parts, rust resistance and other performances; 3, the preparation technology provided by the invention is simple, which is applicable for industrial production and has significant economic and social benefits.

The present invention provides a vehicle braking composite material reinforced by confusion of natural fiber and crystal whisker and preparing method thereof. The raw materials of composite friction material is composed of bamboo fiber, phenolic resin, magnesium sulfate crystal whisker, steel fiber, copper powder, graphite dust, pyrophyllite powder, aluminum oxide, iron oxide, barium sulfate and zinc stearate. The preparing method comprises the following steps: preprocessing the raw materials, mixing the raw materials, hot pressing shaping and heat processing. The invention uses the bamboo fiber with low cost for reinforcing the phenolic resin. The proper amount of wear-increasing agent, anti-wear agent and filling agent for exerting the cooperative coupling function among the substrate, the fiber/crystal whisker and filling agent, thereby obtaining the novel vehicle braking composite material which has the advantages of stable friction coefficient under different temperatures, low wear rate, high heat fading resistance, excellent braking effect, shock absorbing, noise reduction and low cost.

A sheet feed roller, prolonging sustainability of sheet feeding capability in the presence of paper powders, comprises a hub, an elastic layer 2 provided on an outer peripheral surface of the hub and circumferentially-spaced axially-extending plural grooves 21 on the outer peripheral surface of the elastic layer. A textured surface comprising mountain and valley portions is formed on the outer peripheral surface of the elastic layer 2, this textured surface being on the wall and bottom surfaces of the grooves 21 as well as on the surface of the portions 22 between the grooves. A ratio of a total area of the bottom surfaces of the grooves to a total area of the outer peripheral surface of the elastic layer except for the grooves is 10 % to 20 %.

The invention discloses a composite brake pad with stable performance. A brake pad body consists of a pre-friction region, a main friction region and a heat dissipation region, wherein the pre-friction region has a proper friction coefficient, is high in braking performance and cannot scratch a brake flange; the pre-friction region is located at the forefront part of the brake pad body, can form an excellent friction layer and a transfer film through wear to a certain extent, and achieves a good pre-friction effect, so that a foundation is laid for efficient work of the main friction region; the main friction region is compounded by various new fiber materials; the multiple new fiber materials can complement the respective performance shortcomings and also carry out mutual traction action to generate high performance. In a braking process, the highest temperature can be up to 380 DEG C, the friction coefficient and the wear rate of the brake pad cannot be changed, and no cracks appear under sudden braking; the heat dissipation region carries out reasonable matching on various components to ensure that the advantages of all the materials can be fully developed in a friction material, is high in temperature resistance, high in thermal stability and relatively low in heat conductivity, and meets the technical requirements of high wear resistance, high speed and safety of the brake pad.

The invention provides a whisker composite material for reinforcing automobile brake friction and a method for producing the same, wherein the composite friction material consists of basic magneislum whisker, pyrophyllite power, phenol resin, copper powder, graphite powder, aluminium oxide and zine stearate, as raw materials; the producing method comprises raw material pretreatment, raw material mixing, hot press molding and cooling. The invention achieves the phenol resin reinforcement by the basic magneislum whisker [MgSO4.5MgO.8H2O] with excellent low cost, selects the pyrophyllite [Al4Si8O20OH4] as the filler for the assorted fiber brake friction material, the concerted coupling function of a substrate, the whister and the filler can be exerted according to the addition of a friction reinforcing agent, and an antiwear agent, thereby the novel automobile brake composite material has advantages of good heat resistance, moderate coefficient of friction, small wear rate, well heat fade resistance, good brake effect and low cost.

The present invention discloses a process for electrophoretic painting of a fastener, which comprises the following; firstly, a step of phosphatization of zinc series, in which the phosphatization is carried out in a phosphatization tank at a temperature of between 30 and 40 DEG C for 3 to 5 minutes, and the sample piece is subjected to ceaseless shaking, washing, drying for 20 minutes at a temperature between 80 and 100 DEG C; secondly, a step of cathodic electrophoresis, in which the cathodic electrophoresis is carried out in an electrophoresis tank, the tank liquid temperature is between 28 and 32 DEG C, the electrophoresis time is between 2 and 3 minutes and the painting voltage is between 140 and 180 volt, and water washing is adopted; thirdly, a step of drying, in which the surface is dried for 40 minutes at a temperature of between 170 and 180 DEG C. The process solves the problem of processing main Cr6+ pollution in the most universal fastener surface treatment (zinc plating+passivation process, Dacro coating process, darkening process, and the like). The cathodic electrophoretic painting process adopted by the fastener is a novel technology, which improves the corrosion resistance of the fastener and has capacity of protecting environment as well. The composite cost of the process is lower than that of the barrel plating.

The invention relates to a preparation method of a brake molybdenum disulfide-Cu-Fe radical friction material, which takes a Cu-Fe radical alloy as a substrate added with a lubricating component of MoS2, a friction component of SiC and alloy components of Mn and Cr to prepare the brake molybdenum disulfide-Cu-Fe radical friction material and comprises the technological steps of: 1. selecting the original auxiliary powder material; 2. proportioning according to the weight; 3. mechanically stirring and uniformly mixing; 4. pressing into a cylindrical pressed shape; 5. placing the pressed shape into a stainless steel container and filling protective gas of hydrogen into a stainless steel container; 6. placing the container into an intermediate-frequency induction heating coil to be heated, stopping heating after heating and preserving the temperature, and cooling to room temperature along a furnace; 7. taking out a sample to be dried after ultrasonic cleaning; and 8. detecting the property of the sample. The synthesis method of sampling induction heating sintering and burning reactions has the advantage that the prepared molybdenum disulfide-Cu-Fe radical friction material with good brake performance has the characteristics of self-lubrication, moderate frictional factor and less wear rate.

The invention discloses an automatic test device used for testing the uniformity of an antenna radiation field. The device comprises a regular geometric frame and a support bar separated from the geometric frame. The geometric frame is provided with a number of positioning bars capable of moving along the inner frame of the geometric frame. Each positioning bar is directed to the center of the geometric frame and is capable of telescoping. One end of the support bar is perpendicular to the cross section of the geometric frame and is directed to the center of the geometric frame. Probes are used for testing the antenna radiation field are arranged on one end of the support bar and the positioning bars. The automatic test device provided by the invention has the advantages of clever design, simple structure, easy operation, convenient use, low cost of making and maintaining, outstanding substantive characteristics and remarkable progress, and is suitable for large-scale application in the fields of antenna measurement and electromagnetic waves.

The invention provides a dry cleaning agent for cleaning kitchens and hand oil stains. The dry cleaning agent comprises the following components in parts by weight: 4-6 parts of expanded perlite, 1-3 parts of diatomite, 1-3 parts of bentonite, 1-3 parts of coral powder, 2-4 parts of anion active agent, 2-4 parts of nonionic active agent, 0.5-1 part of solvent, 1-3 parts of humectant, 0.5-1 part of foamer, 1-3 parts of disinfectant, 1-3 parts of emollient, 0.03-0.05 part of spice and the balance of purified water. The dry cleaning agent is prepared by the following steps: putting the expanded perlite, diatomite, bentonite and coral powder in a container; mixing and stirring the nonionic active agent, anion active agent, solvent, an addition agent, humectant, foamer, an anti-precipitation agent, disinfectant, emollient and spice in water through using a reaction kettle; pouring the solution into the container for soaking; and then until the solution is absorbed after 10-14 hours, forming water-containing semisolid particles, inspecting and then packaging. The dry cleaning agent has the advantages of no toxicity, no harm, no pollution and no residue, and meets environmentally-friendly and water-saving requirements.

The invention relates to an environment friendly mouse mat for a computer. The mouse mat is composed of a corn fiber shell fabric layer 1, a waterproof layer 2, a support layer 3 and a wrist support part 4. The corn fiber fabric layer 1 is a fabric material and is formed by interweaving warp and weft yarns; the warp yarns are formed by blending corn fibers and anion fibers; the weft yarns are formed by blending the corn fibers and bamboo carbon fibers; the mass percents of the fibers are as follows: 81%-91% of corn fibers, 3%-8% of anion fibers and 5%-12% of bamboo carbon fibers; the linear density of the warp yarns is 12-21 tex; and the linear density of the weft yarns is 12-21 tex. The mouse mat provided by the invention has the advantages that the mouse mat has various healthcare functions; the use performance of the mouse mat can be improved; the mouse mat is green and environment friendly and is low in cost; after the mouse mat is used for a long time, the mouse mat is still smooth without oil dirt and blocking feeling; the original hand feeling and performance are kept after the mouse mat is washed for many times; and the service life is long.

The invention relates to the technical field of brake materials, in particular to a friction material, an organic carbon ceramic brake pad prepared from the friction material and used for an abrasion-resistant coating braking disc, and a preparation method and application of the organic carbon ceramic brake pad. The friction material is prepared from the following raw materials in parts by weight:3-5 parts of carbon fibers, 10-15 parts of steel fibers, 5-10 parts of mineral fibers, 8-12 parts of modified phenolic resin, 5-10 parts of powdered nitrile rubber, 6-10 parts of cashew nut oil frictional powder, 10-20 parts of precipitated barium sulfate, 1-3 parts of acrylic fibers, 2-4 parts of silicon carbide, 5-10 parts of soft kaolin and 9-12 parts of zirconium silicate. The preparation method of the organic carbon ceramic brake pad comprises the steps of pressing, solidifying and forming. The organic carbon ceramic brake pad for the abrasion-resistant coating braking disc is stable instructure, good in heat resistance and friction performance, simple in preparation process and short in preparation period, the matching property between the organic carbon ceramic brake pad and the abrasion-resistant coating braking disc is good, an abrasion-resistant friction pair is made of the organic carbon ceramic brake pad and the abrasion-resistant coating braking disc, and the service life of the braking disc of an automobile, or a new energy vehicle or a bullet train can be effectively prolonged.

The invention relates to smelting mechanical equipment. A sliding mechanism controlling ladle molten steel casting flow rate comprises a main frame, a slide block and a support, wherein the slide block is matched with and slide-mounted in a slide block frame of the support on the lower end of the main frame; frame bodies on two sides of the splicing surface of the main frame and the support are respectively provided with positioning mechanism which are matched with each other; the main frame, the slide block and the support are connected into a whole through elastic tension elements; two sides inside the slide block frame of the support are symmetrically provided with two guide rails respectively; a pulley intermediate steel sheet is arranged in the middle of two guide rails on each side; one corresponding end of the guide rails on two sides is provided with a pulley stopper; after the pulley on the other end of the slide block pushed by a pushing rod of an external hydraulic cylinder drops on the position of the pulley stopper, the pulley on the end is just in the pulley intermediate steel sheet. The pin slide board can be changed and operated conveniently, is better matched with the requirement of ladle continuous casting, improves the safety use coefficient and service life of the sliding mechanism, and is beneficial to new technology of steel-making continuous casting.

The invention belongs to the field of polymer materials, and particularly relates to a preparation method for a polyetheretherketone composite ultrasonic motor alloy friction material. In order to achieve a friction material with high stalling torque and capability of stably operating, a matrix material formula is designed, the influences of different contents of polyetheretherketone, polybenzoate, polytetrafluoroethylene, nano silica and molybdenum disulfide on the stalling torque, no-load speed, motor efficiency, thermal conductivity, mechanical properties and frictional property of a motorare studied, ultimately, a wear-resistant material formula with excellent properties is obtained, and the high-property wear-resistant material is prepared.

The invention relates to the technical field of brake materials, in particular to a friction material, an organic carbon-ceramic brake pad for a light-weight carbon-ceramic plate prepared from the friction material, as well as a preparation method and application thereof. The organic carbon-ceramic brake pad for the light-weight carbon-ceramic plate is prepared from the following raw materials including, by weight, 2 to 4 parts of basalt fiber, 10 to 15 parts of steel fiber, 5 to 10 parts of mineral fiber, 8 to 12 parts of phenolic resin, 5 to 10 parts of elastic particles, 6 to 10 parts of cashew nut oil friction powder, 10 to 20 parts of precipitated barium sulphate, 1 to 3 parts of acrylic fiber, 2 to 4 parts of silicon carbide, 6 to 11 parts of kieselguhr and 9 to 12 parts of glass beads. The preparation method is pressing and thermosetting forming. The organic carbon-ceramic brake pad for the light-weight carbon-ceramic plate provided by the invention is stable in structure, goodin heat resistance and friction performance, simple in preparation process, and short in preparation period, and has good compatibility with the light-weight carbon-ceramic plate and good practicability so as to form a light-weight friction pair, so that the light weight of a vehicle can be effectively realized.

The invention discloses a preparation method of a titanium-containing antifouling wear-resistant bionic paint coating for mineral processing shakers. The bionic paint coating has excellent resistanceto fouling, wear and corrosion, has the basic characteristics of a raw lacquer, has no anaphylactic reaction effects on human bodies during construction, does not reduce the mineral processing efficiency under raw lacquer conditions, and prolong the repairing period. The bionic paint coating concretely comprises, by weight, 25-60 parts of resin, 5-20 parts of bionic paint resin, 5-20 parts of a titanium nano-polymer, 10-30 parts of a wear-resistant filler, 3-10 parts of a special nanometer metal oxide, a curing agent accounting for 15-30% of the weight of the resin, 1.5-3 parts of an assistant, 0.5-2 parts of an anti-settling agent and 15-40 parts of a mixed solvent. The bionic paint coating is suitable for protecting tin, copper and gold mineral processing shakers.

The invention discloses a tribological design and preparation method of an FeNiAlNb-based pin shaft multilayer composite structure material. A FeNiAlNb matrix, an antifriction agent, an anti-wear agent and a reinforcing agent are adopted as the components, a multi-element tabular crystal is prepared, by means of each layer material component design and computation, vibration mixing, hot press molding, multi-layer structure compounding and subsequent machining procedures, the FeNiAlNb-based pin shaft multilayer composite structure material can be prepared. Through reasonable design and optimalproportioning of the matrix alloy, the antifriction agent, the anti-wear agent and the reinforcing agent on a friction film, a bearing transition layer and a matrix bearing layer, the material utilization rate is improved, the production cost is reduced, and the FeNiAlNb-based pin shaft multilayer composite structure material can meet the friction and wear properties under high-low temperature andhigh-load working conditions while having excellent thermal stability and mechanical properties, and also significantly enhances the use precision and service life of the pin shaft on the premise ofobviously improving the connection strength and bearing capacity of the pin shaft.

The invention relates to the field of lubricating oil and especially relates to lubricating oil specially used for a hybrid electric vehicle transmission. The lubricating oil includes, by mass, 87.7-89.7 parts of base oil Yubase 4, 0.5 parts of an additive LK1-300, 1.0-3.0 parts of an additive LK12-095 and 8.8 parts of an additive LK4165B, wherein the total mass part of the base oil Yubase 4, theadditive LK1-300, the additive LK12-095 and the additive LK4165B is 100 parts. The lubricating oil has high insulation performance, excellent abrasion protective capability and excellent temperature increase character. The lubricating oil also can supply a proper friction coefficient to clutches.

The invention relates to a paper bag barrel pull-apart device of a barrel making machine. The paper bag barrel pull-apart device comprises a rack, and further comprises a front pull-apart mechanism and a rear pull-apart mechanism which are arranged on the rack; each of the front pull-apart mechanism and the rear pull-apart mechanism comprises a lower pull-apart part, an upper pull-apart part and amaterial breaking swing arm; the two ends of each lower pull-apart part are rotationally installed on the rack, two material breaking swing arms are arranged and one end of each material breaking swing arm is rotationally installed on the rack, and the upper pull-apart part is rotationally installed between the material breaking swing arms and located at the ends, opposite to the rack, of the material breaking swing arms; the rack is provided with a transmission assembly for driving the lower pull-apart parts and the upper pull-apart parts to rotate, and the conveying speed of the lower pull-apart part and the upper pull-apart part in the front pull-apart mechanism is smaller than that of the lower pull-apart part and the upper pull-apart part in the rear pull-apart mechanism; and the rack is further provided with a reciprocating mechanism for driving the front pull-apart mechanism and the rear pull-apart mechanism to synchronously press down and lift up, so that the influence on thetraction accuracy of the strip-shaped paper in the pull-apart process is reduced.