10 results about "Fatigue resistance" patented technology

The invention discloses a weather-resistant impact-resistant waterproof plugging material with stable quality. The material comprises the following raw materials by weight: 1-2 parts of a water reducing agent, 15-25 parts of polyvinyl alcohol, 10-20 parts of a tackifying promoter, 30-40 parts of a polyurethane prepolymer, 20-30 parts of a magnesium acrylate emulsion, 10-16 parts of ore filling, 3-5 parts of white carbon black, 2-4 parts of a nanometer additive, 5-9 parts of dispersible adhesive powder, 3-7 parts of a weather-resistant aid, 10-14 parts of reinforced fibers and 10-12 parts of water. The waterproof material provided by the invention has the characteristics of stable performance, resistance to cold and heat impact, aging resistance, no cracking, no deformation and superior waterproof performance and impermeability; the material has excellent impact fatigue resistance in outdoor usage and can effectively resist high-frequency repeated impact by heavy rain and hail; the raw materials of the material are safe, reliable, friendly to environment, easily available and cheap; the preparation method for the material is simple; so the material provided by the invention has high practical value and good application prospects.

The invention discloses a production process for rubber of a spherical hinge and belongs to the technical field of rubber production. The production process comprises six steps of compounding, shaping, first-section mixing, second-section mixing, vulcanization and after-treatment, wherein in the step S1, the weighing error of fines is required to be +/-2 g and the weighing error of coarse materials is required to be +/-10 g; in the step S2, the temperature of a roller of an open mill is 30-50 DEG C, and the roller spacing is less than 1 mm; after finish of the step S4, a glue stock needs to beplaced for 8 h or more, the surface of an iron piece needs to be subject to sand blasting before gluing and placed in a ventilated place for drying after gluing; in the step S5, the vulcanizing temperature is controlled to be 150-160 DEG C, the vulcanizing time is controlled to be 50-10 min, and the pressure is controlled to be 10-15 Mpa; and a product vulcanized in the step S6 is ground for edging before electroplating, and subject to extruding and reducing treatment. The production process provided by the invention can greatly improve the attractiveness, the vibration and noise reduction performance, the aging resistance and the fatigue resistance of rubber.

The invention discloses a structure design method of a strand compacted non-rotating steel wire rope with the diameter of 45mm. The method particularly includes the steps: firstly, taking a center fiber core as a center, externally wrapping the center fiber core with six twisted inner-layer strands, compacting the inner strands by a roller after the inner strands are twisted and formed, enabling the compaction rate of each strand to be 12-15%, and forming a first rope; secondly, taking the first rope as a center, externally wrapping the first rope with eleven twisted secondary outer strands, compacting the secondary outer strands by the roller after the secondary outer strands are twisted and formed, enabling the compaction rate of each strand to be 12-15%, and forming a second rope; thirdly, taking the second rope as a center, externally wrapping the second rope with seventeen twisted outer strands, compacting the outer strands by a roller after the outer strands are twisted and formed, and enabling the compaction rate of each strand to be 12-15%. According to the method, the inner strands, the secondary outer strands and the outer strands of the steel wire rope are compacted by the roller, surface contact of one steel wire and the other steel wire in the corresponding strand is achieved, partial linear contact between the strands is achieved, and the steel wire rope is compact in structure, good in fatigue resistance and rotation resistance, high in carrying capacity and long in service life.

The invention discloses an engine crankshaft inspection method, which comprises the following steps of: performing magnetic powder inspection on an engine crankshaft by using a continuous method, and judging that the engine crankshaft without magnetic traces on the surface is qualified; judging the magnetic mark position of the engine crankshaft with the magnetic marks on the surface; if the magnetic trace exists on the parting surface (i) or the parting surface and the non-parting surface (ii), judging the shape of the magnetic trace; if the magnetic traces are fibrous, removing magnetic powder, and then using a residual magnetism method for conducting magnetic powder inspection on the engine crankshaft; and if no magnetic trace is found by using the residual magnetism method, determining that the type of the magnetic trace is a streamline type magnetic trace, and determining that the engine crankshaft is qualified. After the engine crankshaft sorted by the inspection method is loaded and used, the fatigue resistance can be comparable with that of a qualified product judged by an existing method, the reliability is high, and no use risk exists in loading. For the same batch of engine crankshafts, the rejection rate in the prior art is more than 10%, and the rejection rate of the test method is only 0.05%, so that the misjudgment rate is greatly reduced.

The invention provides a carbon fiber composite operation skeleton of a display and control console. The carbon fiber composite operation skeleton comprises a skeleton upper half part, a skeleton lower half part, rivets and carrying plate nuts, wherein the skeleton upper half part and the skeleton lower half part are manufactured through a carbon fiber composite; the skeleton lower half part is provided with an edge groove used for clamping the skeleton upper half part; a structural adhesive is arranged at the edge groove part of the skeleton lower half part; the skeleton upper half part and the skeleton lower half part are bonded through the structural adhesive; and the skeleton upper half part and the skeleton lower half part are connected at the edge groove part through the rivets and the carrying plate nuts. According to the carbon fiber composite operation skeleton of the display and control console, the composite structure with high specific strength and good vibration resistance, shock resistance, fatigue resistance and corrosion resistance is obtained through assembly, and the weight of an operation module of the display and control console is greatly decreased.

The invention discloses an ion filling and depositing combined treatment method of rolling bearing ring raceways. The method comprises the following steps: putting a to-be-treated rolling bearing ring into an ethanol solution with purity of 99%, and ultrasonically washing for one or more times with each for 15-20 minutes; putting the ultrasonically washed rolling bearing ring into the worktable of a vacuum chamber, mounting an Mo cathode at the pulse cathode arc source of the vacuum chamber, rotating the worktable to be in front of the pulse cathode arc source, and releasing a pulse bias voltage; introducing high-purity N2 into a vacuum chamber main body and releasing the pulse bias voltage; recovering the pressure of the vacuum chamber to be normal and cooling. After the inner and outer raceways of a rolling bearing are processed by adopting the method, the working surface hardness, wear resistance, corrosion resistance and fatigue resistance of the bearing are remarkably improved, the friction coefficient is remarkably reduced, and the service life of the bearing can be very effectively prolonged.

The invention relates to an information collection device bracket applied to an information tracing system. The information collection device bracket comprises a bottom end fixing part, a main expanding rod and a secondary expanding device. Through improvement of the material of a first rotating shaft and a second rotating shaft, the material comprises the following components in percentage by weight: 0.016-0.038% of C, 0.3-0.5% of Si, 1.0-1.9% of Mn, 19-22% of Cr, 6.6-8.0% of Ni, 0.02-0.25% of Nb, 0.02-0.06% of RE, 0.02-0.11% of N, less than 0.01% of S, less than 0.05% of P and the balance of Fe and inevitable impurities. Through improvement of microstructure, an information collection head is capable of carrying out all-angle information collection on a production line; and an information collection device is durable and is high in fatigue resistance.

The invention discloses an efficient and material-saving metal processing fixture. The efficient and material-saving metal processing fixture is characterized by comprising a jack, a punch pin, a workpiece, a lower die and a lower die installation seat, wherein the fixture is mainly composed of an upper die and the lower die; the jack is arranged on the upper die in a sleeving manner; the lower die is installed in the lower die installation seat; the upper die is a concave die, and the lower die is a convex die; the upper die is the high-strength high-rigidity punch pin; the punch pin corresponds to a groove of the lower die in position; and the station of a workpiece is arranged between the punch pin and the lower die. The efficient and material-saving metal processing fixture disclosed by the invention has the following advantages: the workpiece with a flanged backward barrel body on the end part is machined in a manner of combining forward extrusion with backward extrusion, the materials are saved, the production cost is lowered, the production efficiency is increased, the crystal granularity level is high, and the metal flow line is smooth; and the product is higher in fatigue resistance and tensile strength.