145results about How to "Low heat generation" patented technology

The invention discloses a high-performance ozone-resistant air spring and a preparation method thereof. An inner-layer rubber material and an outer-layer rubber material of the air spring are mainly prepared from the following components: chloroprene rubber, natural rubber, butadiene rubber, an anti-aging agent AW-66, an anti-aging agent 4010NA, an anti-aging agent 4020, microcrystalline wax, N660 carbon black, naphthenic oil, zinc oxide, CZ and insoluble sulfur. The preparation method comprises the steps of first-stage mixing, rubber discharging, standing, second-stage mixing, rubber discharging, standing, rubber sheet calendering, blastocyst forming, wrapping the blastocyst on the surface of a capsule, and performing high-pressure nitrogen vulcanization to form the air spring. The chloroprene rubber, the natural rubber and the butadiene rubber are blended and modified, so that the rubber has the following characteristics that the ozone resistance and the weather aging resistance are remarkably improved; the properties such as tensile strength, stress at definite elongation and tear resistance are improved; the production process properties such as extrusion and calendaring properties are improved, the deflection resistance of the rubber material is improved, and the service life of the product is prolonged.

The utility model discloses an indexable wave-shaped edge turning blade which comprises a blade body with a center hole in the geometric center, a cutting unit is arranged on the upper surface of the blade body, and the cutting unit comprises an arc edge located at the vertex angle of the blade body and a main cutting edge connected with the two ends of the arc edge. Chip flutes are formed in the main cutting edge in the direction extending towards the center hole, and every two adjacent chip flutes located at the vertex angle are symmetrically separated through an isolation belt; the main cutting edge includes a wave-shaped cutting edge, the wave shape of which is shaped in an axial direction. Through the design of the wave-shaped cutting edges, the chip flutes and the isolation belts, the cutting force is effectively reduced, the chip treatment is improved, the quality of the machined surface is remarkably improved, and the service life of the cutter is remarkably prolonged.

The present invention provides a bio-based sustainable tire tread rubber composition and a preparation method thereof, and relates to the field of rubber tire manufacturing, the bio-based sustainable tire tread rubber composition is prepared from the following raw materials by weight: 10-50 phr of natural rubber, 30-90 phr of solution polymerized styrene butadiene rubber, 0-15 phr of eucommia ulmoides rubber, 30-60 phr of carbon black, 5-20 phr of a lignin reinforcing filler, 0-3 phr of a lignin-based anti-aging agent, and 1-6 phr of a conventional anti-aging agent, the formula comprises the following components in percentage by weight: 3-7 phr of zinc oxide, 0.2-2 phr of stearic acid, 1-3 phr of an accelerant and 1-4 phr of a vulcanizing agent. According to the prepared rubber material, the lignin reinforcing filler and the lignin-based anti-aging agent are used for replacing traditional carbon black filler and petroleum-based anti-aging agent products, the use amount of petroleum-based chemicals in a formula system is reduced, environmental pollution is reduced, and carbon emission is reduced; the adopted preparation process can effectively promote the dispersion of the lignin filler; in the prepared rubber composition, the eucommia ulmoides rubber is applied, so that the mechanical property and the fatigue property of vulcanized rubber can be effectively improved.

The invention belongs to the technical field of rubber, and particularly relates to a rubber composition, a preparation method thereof and a truck tire using the rubber composition. The rubber composition is prepared from the following components in parts by mass: 100 parts of diene rubber, 0.2 to 1.5 parts of hydrazide compound, 0.2 to 1.5 parts of pyrazolone compound, 0 to 30 parts of liquid rubber, 20 to 120 parts of reinforcing filler, 0 to 10 parts of silane coupling agent, 2 to 10 parts of vulcanization activator, vulcanization accelerator, vulcanizing agent, antioxidant, resin and plasticizer. The heat generation of the tire can be obviously reduced, and meanwhile, the cutting resistance and tear resistance of the tire are improved, so that the damage resistance of the truck tire is improved.

The invention provides high-strength wear-resistant ultralow-rolling-resistance conveyor belt cover rubber and a preparation method thereof, and relates to the technical field of conveyor belts, the cover rubber comprises the following components by weight: 40-80 parts of natural rubber, 20-60 parts of synthetic rubber, 40-80 parts of a hybrid reinforcing material, 1-2 parts of sulfur, 1-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-8 parts of an accelerator, and 1-5 parts of an anti-aging agent. According to the high-strength wear-resistant ultralow-rolling-resistance conveyor belt cover rubber and the preparation method thereof, the high-structure carbon black N339 and the nano silicon dioxide are hybridized, so that ion covalent bonds are formed between the high-structure carbon black N339 and the nano silicon dioxide, the N339 and the nano silicon dioxide are uniformly dispersed, the structure is stable, and the nano silicon dioxide can be uniformly dispersed without a traditional coupling agent; the N339 and the nano silicon dioxide are subjected to hybridization treatment, so that the structure is more stable, the RRF coefficient of the sizing material is reduced, and the reinforcing effect is improved.

The invention provides an air supply system of a gas turbine bearing sealing cavity. Comprising a low-pressure compressor, a high-pressure compressor, a combustion chamber, a high-pressure turbine, a low-pressure turbine, a power turbine, a low-pressure compressor front bearing cavity, a transition section bearing cavity, a high-pressure compressor rear bearing cavity, a low-pressure turbine supporting ring bearing cavity and a power turbine supporting ring bearing cavity. Sealing air cooled by the three gas-liquid air coolers flows through the four bearing cavity runners, the two cold air surrounding cavities and the inner hole of the output shaft and then flows into a bearing sealing cavity, heat generated in the bearing cavity of the gas turbine can be reduced, and due to the adoption of a reasonable air supply system, the heat generated in the bearing cavity of the gas turbine can be reduced. Therefore, heat convection between high-temperature air outside the bearing cavity and the wall surface of the cavity can be effectively isolated, and the temperature of the wall surface of the bearing cavity is effectively cooled, so that heat convection between the wall surface of the bearing cavity and lubricating oil and oil gas in the cavity is reduced.

The invention belongs to the technical field of tire manufacturing, and particularly discloses application of a SiO2 / C composite material in preparation of an upper apex. Specifically, the upper apex disclosed by the invention comprises 100 parts of natural rubber; 0-40 parts of a filler; 10 to 60 parts of a SiO2 / C composite material; 5-10 parts of an activator; 0.5 to 4 parts of tackifying resin; 3-6 parts of a vulcanizing agent; and 2-5 parts of an anti-aging agent. The SiO2 / C composite material can effectively replace white carbon black or carbon black when being used in the preparation process of apex on a tire, and the tire prepared based on the SiO2 / C composite material has low heat generation and excellent fatigue resistance.

The invention discloses a shoe material and a preparation method thereof. The shoe material is prepared from the following raw materials in parts by weight: 15 to 25 parts of natural rubber, 30 to 45 parts of butadiene rubber, 18 to 24 parts of solution polymerized styrene-butadiene rubber, 8 to 15 parts of modified inorganic filler, 5 to 8 parts of lubricant, 5 to 10 parts of antioxidant, 2 to 5 parts of plasticizer, 3.5 to 6 parts of vulcanization accelerator, 2 to 4 parts of anti-aging agent and 15 to 25 parts of modified carbon fiber. By modifying the filler white carbon black and the carbon fiber, the compatibility and bonding strength among the white carbon black, the carbon fiber and the rubber base material are improved, so that the mechanical property, the tear resistance, the wear resistance, the skid resistance, the aging resistance, the corrosion resistance and the elasticity of the shoe material are remarkably improved.

The invention relates to the technical field of grinding and polishing devices, and particularly discloses a carbon steel and stainless steel composite board solder grinding and polishing device which comprises a dust removal assembly, a grinding assembly, a cooling assembly and a main body frame, and the main body frame is located outside the grinding assembly and the cooling assembly; the dust removal assembly comprises a first recycling box, a dust removal pipe, a supporting rod and a dust remover, the first recycling box is fixedly connected above the main body frame, the dust removal pipe is communicated with the dust remover and the first recycling box, and the supporting rod is fixedly connected between the dust remover and the main body frame. Friction and heat generation between a workpiece and the grinding roller can be reduced, the surface of the workpiece is protected, deformation is avoided, and the production efficiency is improved; flying dust and welding slag are effectively reduced, the working environment quality of a workshop is improved, and influences on operators are avoided.

The invention belongs to the technical field of rubber, and particularly relates to a rubber composition, a preparation method thereof and an OTR engineering tire using the rubber composition. The rubber composition disclosed by the invention is prepared from the following components in parts by mass: 100 parts of diene rubber, 0 to 1.5 parts of tetrazine compound, 0.2 to 1.5 parts of pyrazolone compound, 0 to 30 parts of liquid rubber, 20 to 100 parts of reinforcing filler, 0 to 5 parts of silane coupling agent, 2 to 10 parts of vulcanization activator, vulcanization accelerator, vulcanizing agent, antioxidant, resin and plasticizer. The proportions of the tetrazine compound and the liquid rubber are not zero at the same time. The heat generated by the OTR engineering tire can be obviously reduced, and the damage resistance of the tire is improved.

The invention discloses a bio-based white carbon black dispersing agent as well as a preparation method and application thereof. The dispersing agent is prepared by heating and mixing a bio-based raw material and petroleum resin, the bio-based raw material is one or more of rhamnolipid, sophorolipid and trehalose lipid, and the petroleum resin is one or more of C5 aliphatic petroleum resin, C9 aromatic petroleum resin, DCPD cycloaliphatic diene petroleum resin and alpha-methylstyrene petroleum resin. The preparation method comprises the following steps: heating and stirring the bio-based raw materials until the raw materials are molten, adding the petroleum resin, continuously stirring and uniformly mixing in a heating state, and cooling to room temperature. The bio-based white carbon black dispersing agent has the characteristics of simple preparation process, mild conditions and good compatibility with raw rubber, and can significantly improve the dispersibility of white carbon black, reduce the heat generation of a rubber material and improve the quality of a rubber product.

Provided are a battery cell, a battery, an electrical apparatus, and a method and device for manufacturing a battery cell. The battery cell includes a case (110), an end cover (120), an electrode assembly (130) and a solder (140), the case (110) has an accommodating cavity (111) and an opening at one end; the end cover (120) is connected to the case (110); the electrode assembly (130) is provided in the accommodating cavity (111), the electrode assembly (130) has a first tab (131), and the first tab (131) faces the opening; the solder (140) is provided between the end cover (120) and the first tab (131) and connects the end cover (120) and the first tab (131); an insulating member (150) is also provided between the end cover (120) and the first tab (131), an insulating cavity (151) is provided on the insulating member (150), a feed port (152) is provided on one side of the insulating cavity (151), and the feed port (152) faces the solder (140).

The present invention relates to an electrode stack for a lithium secondary battery, in which one or more positive electrodes and one or more negative electrodes are alternatingly stacked with a separator therebetween, wherein an insulation layer having an average thickness of 1 um to 8 um is formed on the outermost positive electrode of the electrode stack, and the positive electrode includes a positive electrode collector; a positive electrode active material layer; and a protective layer including an inorganic compound which is disposed between the positive electrode collector and the positive electrode active material layer, and an electrode assembly and a lithium secondary battery which include the electrode stack.

Provided are a secondary battery and a preparation method thereof, and an electric device. The secondary battery includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative active material and a lithium supplement agent, and an insulating material is dissolved in the electrolyte. A mass ratio of the insulating material in the electrolyte ranges from 0.1% to 4%. The insulating material is derived from the negative electrode plate prior to injection the electrolyte, and the insulating material is arranged between the negative active material and the lithium supplement agent in the negative electrode plate prior to the injection the electrolyte.

The invention discloses a composite tire and a manufacturing method thereof. The method comprises surface pretreatment of a tire carcass, configuration of a tread treatment agent, and casting and molding the composite tire tread using a unique process. The method has the characteristics of simple manufacturing process and low cost. The manufactured composite tire has a series of outstanding advantages such as good elasticity, low rolling resistance, low fuel consumption, good tread wear resistance, etc., has high cost performance, and is easy to industrialize.

The utility model relates to a packing structure of a reciprocating compressor, in particular to a packing structure of a polyolefin reciprocating compressor. Comprising a water jacket shell, an end flange, a piston shaft, a packing box and sealing ring sets, the water jacket shell is arranged on the outer side of the piston shaft, the end flange is arranged at one end of the water jacket shell, the packing box is arranged between the water jacket shell and the piston shaft, the sealing ring sets comprise the first sealing ring set and the normally-sealed ring set, and the first sealing ring set is arranged on the side, away from the water jacket shell, of the end flange; the first sealing ring set comprises two tangential rings arranged in parallel. According to the first sealing ring set, the sealing effect of the packing structure can be greatly improved through two tangential rings arranged in parallel, when the inner diameter of packing is abraded, good self-compensation performance can be provided, and the reliability of the sealing effect is improved; the damage to the filler structure is smaller; the friction surface is almost not increased under the condition that an additional filler box is not added, the heat generation is reduced, the manufacturing is simpler, the cost is lower, and the effect is better.

The utility model relates to a quick charge adapter circuit, including transformation circuit and synchronous rectification circuit, transformation circuit includes transformer T1, transformer T1 includes first secondary side coil and second secondary side coil, the first end of second secondary side coil is used as the positive pole of direct current power supply VOUT2, synchronous rectification circuit includes NMOS transistor Q1 and rectification controller U4, the second end of second secondary side coil is used as the positive pole of direct current power supply VOUT2. The drain electrode of the NMOS tube Q1 is connected with the second end of the second secondary side coil, and the grid electrode of the NMOS tube Q1 is connected with the control end of the rectification controller U4; the power output end of the rectification controller U4 is connected with the first end of the first secondary side coil, the speed setting end of the rectification controller U4 is grounded through a resistor R75, and the monitoring end of the rectification controller U4 is connected with the drain electrode of the NMOS tube Q1 through a resistor R74. Compared with traditional diode rectification, the synchronous rectification circuit reduces conduction loss and improves rectification efficiency.

The invention discloses an off-the-road tire tread with a three-dimensional sipe pattern structure, which comprises a central pattern block I and a central pattern block II which are alternately arranged in the circumferential direction, and shoulder pattern blocks are respectively arranged on two sides of the central pattern block I and the central pattern block II; the first central pattern block is separated from the two adjacent second central pattern blocks through a first transverse three-dimensional sipe groove and a second transverse three-dimensional sipe groove respectively, the first central pattern block and the second central pattern block are separated from the shoulder pattern blocks through longitudinal sipe grooves, and the adjacent shoulder pattern blocks are separated through main pattern grooves. The transverse three-dimensional sipe pattern grooves I, the transverse three-dimensional sipe pattern grooves II, the longitudinal sipe pattern grooves and the main pattern grooves are communicated with one another; and the groove walls of the transverse three-dimensional sipe grooves I and the transverse three-dimensional sipe grooves II are zigzag. The overall saturation degree of the tread pattern is 75-85%, the tread rigidity is high, and the tire has good puncture resistance and abrasion volume and is suitable for scenes with severe working conditions.

The present invention relates to the technical field of preparation of air springs, and in particular to an anti-fatigue rubber composition, a mixing method and an application in the preparation of air springs. The chloroprene rubber used in the present invention has a lower storage modulus at 30°C. At the same time, liquid butadiene rubber is used to replace the environmentally friendly oil to reinforce the rubber composition, and the rubber composition has a lower Mooney viscosity (ML1+4)×100°C and a Young's modulus E' at ‑20°C. The lower the Mooney viscosity, the better the mixing performance and calendering performance of the rubber composition, and the better the anti-bending crack performance and low temperature resistance (characterized by the Young's modulus E' at ‑20°C) of the rubber composition. The present invention provides excellent mixing and calendering processes, and the air spring prepared using the rubber composition of the present invention has lower heat generation and better fatigue resistance.

The invention relates to the technical field of natural rubber preparation, and discloses an imitated smoke sheet rubber and a preparation method and application thereof.The impurity content of the imitated smoke sheet rubber is controlled to be 0.05% or below, the tensile strength is larger than or equal to 25 MPa, the elongation at break is larger than or equal to 750%, the initial plasticity value is larger than or equal to 35, the plasticity retention rate is larger than or equal to 80%, the Mooney viscosity is 83 + / -10 ML (1 + 4) 100 DEG C, and the vulcanization time T90 of a pure rubber formula is 10-25 min. The thermo-oxidative aging resistance retention rate is greater than or equal to 85%, and the ozone cracking resistance time is 9-10 h. The smoke-imitating sheet rubber prepared by the invention is good in mechanical property, proper in vulcanization time, good in thermo-oxidative aging resistance and long in ozone cracking resistance time.

The utility model discloses a semi-steel radial limo tire with a high-load and high-tire-bead durable structure, which relates to the technical field of tires and comprises a tire body, a tire bead is arranged on the outer side of the tire body, a tire side is arranged on one side, far away from the tire bead, of the tire body, a tire tread is arranged on one side of the tire side, a belted layer is arranged at the lower end of the tire tread, and a reinforcing layer is arranged between the tire body and the tire side. According to the semi-steel radial limo tire with the high-load and high-tire-bead durable structure, the tire side part adopts a multi-composite structure, so that the friction force between the tire bead part and the wear-resistant rubber and the friction force between the belted layer and the upper end of the tire side part under high load can be reduced, the heat generation is low, the premature wear and delamination of the shoulder part of the tire are reduced, and the service life of the tire is prolonged. The double-bead filler structure is arranged, the supporting effect of the ring part is provided, transmission of stress of the ring part to the tire side half part is borne, the nylon wrapping cloth is wound on the outer side of the steel wire, the adhesiveness is increased, the tire body and the tire side structure are fastened, dispersion of circumferential attaching force of the ring part is facilitated, and the durability of the tire bead is enhanced.

The utility model discloses a compact single-action rotary clamping air cylinder, and belongs to the technical field of air cylinders. Comprising a rotating cylinder which is provided with a rotating shaft capable of rotating around the axis of the rotating shaft; the linear air cylinder is provided with a piston rod, and the piston rod can do linear motion independently in the axial direction; the rotating cylinder is detachably connected with the linear cylinder through a fastener, the rotating shaft is matched with the piston rod through a key groove, and when the rotating shaft is static, the piston rod can independently execute linear motion; when the rotating shaft rotates, the piston rod is driven to rotate synchronously. Due to the fact that the rotating action and the clamping action can be independently controlled, an operator can flexibly adjust the operation sequence according to different working condition requirements, the operation flexibility and logicality of the device are greatly improved, the device can better adapt to complex working scenes, and the production efficiency and the product quality are improved.

The invention relates to the technical field of grinding disc manufacturing and sharpening, in particular to a manufacturing and sharpening method and sharpening device for a metallic bond grinding disc, in the manufacturing and sharpening method for the metallic bond grinding disc, the metallic bond grinding disc is divided into two ring widths, the outer ring width is coarse-grained diamond, and the inner ring width is fine-grained diamond; a low-melting-point substance is added in the reducing atmosphere process to guarantee sintering compactness, high-pressure low-temperature cooling is adopted after sintering, the cooled grinding disc is clamped through a rotatable clamp and then placed below a sharpening device, the grinding edge of the grinding disc is machined, so that the edge shape of the grinding disc is optimized, the grinding disc provides a smoother surface machining effect, and the grinding efficiency of the grinding disc is improved. The prepared metal bond millstone can improve the cutting efficiency during grinding to a certain extent through sharpening treatment, the sharp millstone can disperse heat generated in the grinding process, the abrasion speed of the millstone is reduced, and therefore the service life of the millstone is prolonged.

The utility model relates to a double-layer memory packaging structure, which comprises a carrier plate including an upper carrier plate and a lower carrier plate, the upper carrier plate is connected to the upper end of the lower carrier plate, and the upper carrier plate is electrically connected with the lower carrier plate; and the chip set is arranged at the upper end of the carrier plate and comprises a high-bit-element chip set and a low-bit-element chip set, the high-bit-element chip set is arranged at the upper end of the upper carrier plate, and the low-bit-element chip set is connected with the upper end of the lower carrier plate. By the adoption of the structure, stacking of multiple layers of chips is achieved, and the problem of heating in the storage process is solved.

The invention relates to the field of rubber, and discloses a rubber processing modified master batch and a preparation method and application thereof, a rubber composition and application thereof, and vulcanized rubber and a preparation method and application thereof, the rubber processing modified master batch comprises a mercapto acid monomer, an ethylene-vinyl acetate copolymer and white carbon black; wherein the content of the mercapto acid series monomer is 40-55 parts by weight, the content of the ethylene-vinyl acetate copolymer is 15-35 parts by weight, and the content of the white carbon black is 15-30 parts by weight. The rubber processing modified master batch provided by the invention can improve the compatibility and dispersity of a mercapto acid monomer in a high-viscosity rubber matrix, so that the strength of tire tread rubber can be better improved, the heat generation of the tire tread rubber is reduced, the wet skid resistance is improved, the rolling resistance is reduced, and the energy consumption in the mixing process is reduced.

The invention discloses an environment-friendly rubber nano composite material for tires, and relates to the technical field of rubber, the rubber nano composite material is prepared by mixing the following raw materials based on 100 parts by weight of raw rubber components: 100.0 parts of natural rubber, 10.0-90.0 parts of carbon black, 1.0-80.0 parts of white carbon black and 1.0-20.0 parts of nanocrystalline cellulose, and a proper amount of a vulcanizing agent, an accelerant, an active agent and an anti-aging agent. Precipitated silicon dioxide, carbon black and nano microcrystalline cellulose are used as reinforcing filler, high reinforcing property is achieved, the viscous modulus is gradually reduced along with increase of the amount of carbon black replaced by nano microcrystalline cellulose due to the fact that waste paper nano microcrystalline cellulose is polar while natural rubber is non-polar, and the viscosity modulus is gradually reduced along with increase of the amount of carbon black replaced by nano microcrystalline cellulose. Due to the addition of the waste paper nano microcrystalline cellulose, the networking of the filler is reduced, so that the energy consumed by irreversible deformation is reduced, and the service life of the waste paper nano microcrystalline cellulose is further prolonged.

The belt ply structure of the all-steel radial tire comprises a lining layer and a belt ply assembly which are arranged on a tire body, and the belt ply assembly comprises a first belt ply, a second belt ply, a third belt ply and a fourth belt ply which are sequentially arranged from bottom to top. A steel wire cord fabric layer is arranged between the second belted layer and the third belted layer and is of a steel wire structure wound in the circumferential direction of the tire body, so that crossed net structures are respectively formed between the steel wire cord fabric layer and the first belted layer, between the steel wire cord fabric layer and the second belted layer, between the steel wire cord fabric layer and the third belted layer and between the steel wire cord fabric layer and the fourth belted layer; the steel wire cord fabric layer is arranged between the second belted layer and the third belted layer, so that a crossed net-shaped structure is formed between the steel wire cord fabric layer and each belted layer, the hooping coefficient of a tire body is improved, the tire is effectively prevented from being excessively deformed in the high-bearing and high-speed running process of the tire, the effects of reducing heat generation and improving the impact resistance are achieved, and the service life of the tire is prolonged. The safety coefficient of the tire is greatly improved.

The application discloses a preparation method of modified white carbon black, modified white carbon black, and prepared masterbatch and vulcanized rubber. The preparation method of the modified white carbon black comprises the following steps: uniformly mixing silane coupling agent, sorbitan fatty acid ester surfactant, organic solvent and white carbon black to obtain the modified white carbon black. The application uses specific surfactant sorbitan fatty acid ester and silane coupling agent, modifies the white carbon black organic solvent dispersion liquid in a high-speed dispersion machine, and prepares the masterbatch filled with the white carbon black by liquid-phase compounding technology of the rubber solution, so as to prepare the rubber vulcanized rubber from the masterbatch. Compared with the traditional dry mixing technology or the wet mixing technology using the coupling agent alone, the dispersion of the white carbon black in the rubber matrix is better, the dynamic performance, heat generation and wear resistance of the rubber compound are improved, and the prepared vulcanized rubber can be used for preparing the tread rubber, so that the rolling resistance and heat generation of the tire are reduced.

The utility model belongs to the technical field of edging equipment, and particularly relates to a sponge knife edging machine which comprises a machine body, a rotating seat is arranged on the machine body, a rotating plate is rotatably connected to the rotating seat, the rotating plate is slidably connected to a sliding seat, the machine body and the rotating plate are rotatably connected with a driving air cylinder through the rotating seat, a servo motor is installed on the rotating plate, and the servo motor is connected with the rotating seat. The output end of the servo motor is connected with a lead screw, the lead screw is in threaded connection with a screw block, the screw block is connected with a movable seat, the movable seat is fixedly connected with a rotating motor, and the output end of the rotating motor is connected with a large wheel disc. According to the utility model, a grinding wheel grinding and tooth punching scheme is adopted, water flow is configured for cooling in the whole process, a product generates low heat and is not easy to deform in the machining process, damage to materials in the machining process is small, the production quality is obviously improved, a circulating filtered water scheme is safe and environment-friendly, the grinding amount is controlled by a servo mechanism, the precision and stability are realized, and the cutting edge quality is stable, and the quality is obviously improved.

The invention discloses a star-shaped functionalized branching agent, the branching agent is a star-shaped butadiene polymer, the structure of the branching agent is A-Y-(Bd) n, A is alkyl with functional groups such as an imino group, a phenyleneimino group or an epoxy group; y is Si or Sn; bd is a polybutadiene homopolymer; and n is the number of arms of the polymer and is 3-6. The invention also discloses a preparation method and application thereof. The star-shaped functionalized branching agent is used for modifying the rare earth butadiene rubber, branching not only can reduce the viscosity of a rubber solution in the polymerization process, but also can bring quantitative functional groups into a molecular chain, and the functional groups can enhance the dispersion of a reinforcing filler, especially white carbon black, in a rubber matrix, so that the mechanical properties of the rubber matrix are improved. The strength, the compression fatigue temperature rise performance, the heat generation performance and the like of the butadiene rubber are improved, and the synthesized butadiene rubber is suitable for being used as a high-performance tire sidewall and tread combined rubber.