93 results about "Grain crushing" patented technology

The invention relates to the technical field of grain crushing, in particular to a feed processing crusher which comprises a crushing box and a support for supporting the crushing box, rotor hammers for crushing are arranged in the crushing box, and the feed processing crusher further comprises a dust extraction shell arranged on one side of the crushing box and used for removing dust, one side of the dust suction shell communicates with a through pipe communicating with the interior of the crushing box, a plurality of blades for air suction are arranged in the dust suction shell, and a driving assembly for driving the rotor hammer pieces and the blades to rotate is arranged at the top of the support; and the material ejecting piece is arranged in the crushing box and used for supporting materials, a transmission assembly for driving the material ejecting piece to move is arranged in the crushing box, and a material pushing assembly matched with the transmission assembly is arranged in the crushing box. And through the arrangement of the dust suction shell and the blades in the dust suction shell, a through pipe, a middle through pipe and a plurality of auxiliary dust suction pipes diverging along the center, the dust suction efficiency is greatly improved, and it is ensured that dust generated in the crushing process of materials needed by livestock raising can be sucked away.

The present invention relates to the technical field of corn threshing, and in particular to a corn harvester threshing device capable of reducing the seed breakage rate. It comprises a mounting frame, etc.; the mounting frame is connected to an external feeding device, and the feeding device has a discharge port. The present invention threshes the corn kernels by cutting the corn kernels with a cutting rope, and the stalk of the corn kernels can be separated from the main body during cutting, so that the corn kernels after threshing do not contain the stalk part, thereby solving the problem that the corn kernels with stalks affect the taste when eaten. At the same time, it avoids the problem of high seed breakage rate caused by traditional threshing methods such as impact or rubbing; and when performing the threshing operation, the electric push rod 1 drives the connecting block 1 and the cutting rope to move back and forth through the electric push rod 2, so that the cutting rope cuts the corn kernels in a mobile cutting manner, accelerates the threshing speed, and effectively avoids the corn kernels squeezing the cutting rope, resulting in the situation that the cutting rope is affected.

The application discloses a processing method of low-cost high-performance tantalum alloy plate, which comprises the following steps: using a firm electrode obtained by uniformly mixing Ta powder, W powder and Nb powder and then welding as raw material, carrying out twice electron beam melting to obtain a large-size tantalum alloy ingot; through primary extrusion on the large-size ingot, repeated operations of turnover forging and shaping and secondary extrusion, a three-time extruded rod blank is obtained; finally, the extruded rod blank is subjected to blanking, intermediate annealing, cross-rolling and product annealing, and the preparation of the tantalum alloy plate is completed. The application uses Nb to replace part of the Ta matrix to prepare a new type of tantalum alloy, and the raw material cost can be reduced by about 1 / 4. Then, through multiple turnover forging and extrusion, cross-extrusion of the ingot is realized, the advantages of shear deformation and dislocation interlacing on grain crushing are fully utilized, the grain size of the prepared plate is above 8.0, and the mechanical properties are better than those of a traditional Ta2.5W alloy, so that the plate can be used as a preferred material for weapon equipment structural parts.

The utility model relates to grain crushing equipment technical field, concretely relates to a kind of intermittent grain grinder, including support, the middle part of support is fixed with box, the bottom of box keeps communication with crushing assembly, and interval discharging device is provided in box, interval discharging device includes discharge port, driving motor and release plate set in discharge port, the middle part of discharge port is provided with discharge port, the middle part of release plate is connected with connecting shaft and is set, the middle part of release plate is fixed with the spacer of L type, the output end of driving motor is fixedly connected with arc plate, exposed hole and connecting ring contact, so grain can be passed down from bottom, into crushing assembly, complete the function of intermittent crushing, intermittent feeding mechanism can accurately control material input and crushing rhythm, avoid equipment blockage due to too much material in short time, ensure that the crushing process is smooth and efficient, compared with traditional continuous type grinder, crushing efficiency can be improved by more than 30%.

The utility model relates to the technical field of silage maize harvesters, in particular to a crushing device gap adjusting system and a silage maize harvesters, the system comprises a hydraulic oil tank, an oil supplementing pump, an adjusting valve, a driving device, a plurality of adjusting oil cylinders, a first crushing roller device and a second crushing roller device, the adjusting valve comprises a valve sleeve and a valve rod, and a plurality of containing cavities are formed in the valve sleeve; the valve rod is installed on the valve sleeve, and the driving device can drive the valve rod to move in the multiple containing cavities at the same time. An oil inlet and a plurality of oil outlets are formed in the valve sleeve, the oil inlet communicates with the containing cavities, and the oil outlets correspond to the containing cavities one to one; oil inlets of the oil tank, the oil supplementing pump and the adjusting valve are communicated through pipelines; oil inlets of the plurality of adjusting oil cylinders are in one-to-one correspondence with the plurality of oil outlets and are communicated with the plurality of oil outlets through pipelines; a piston rod of the adjusting oil cylinder is used for driving the first crushing roller device to move relative to the second crushing roller device so as to change a gap therebetween. The system can be used for adjusting the gap of the grain crushing device.

The invention discloses a threshing device, a threshing method and a control system.The threshing device comprises a rack, a screen drum unit and a roller unit, the screen drum unit is connected with the rack, screen holes are formed in the screen drum unit, threshed grains are discharged out of the screen drum unit through the screen holes, the roller unit is connected with the rack, and the roller unit penetrates into the screen drum unit; the roller unit comprises a threshing roller and a plurality of threshing modules, the threshing modules are connected with the threshing roller, the threshing modules are arranged in the circumferential direction of the threshing roller at intervals, and the extension size of at least part of the threshing modules in the radial direction of the threshing roller is adjustable. And at least part of the threshing module with the adjustable extension size in the radial direction of the threshing cylinder can extend out of or retract into the threshing cylinder. According to the threshing device, the spacing distance between the threshing component and the sieve plate can be adjusted, the risk that grains are broken and blocked is reduced, and the quality and stability of continuous operation are improved.

1. Name of the designed product: grain grinder. 2. Use of the designed product: used for grinding, milling grains, beans and other food. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The utility model discloses a multistage grain crushing mechanism which comprises a crushing bin, the front face of the crushing bin is fixedly connected with a feeding pipe, one end of the feeding pipe penetrates through and extends to the inner side of the crushing bin, the lower end of the crushing bin is conical, and a discharging hole is formed in the conical end of the crushing bin; a crushing part for crushing grains is arranged on the crushing bin; the smashing part comprises a supporting bin fixedly connected to the inner wall of the smashing bin, the discharging end of the feeding pipe penetrates through and extends into the supporting bin, and the inner wall of the supporting bin is rotationally connected with a first rotating shaft and a second rotating shaft correspondingly. According to the utility model, the top crushing roller and the bottom crushing roller which are supported by a group of the first rotating shaft and the second rotating shaft in the supporting bin are used for performing multi-stage crushing on grains guided into the supporting bin, and meanwhile, the crushed grains can be rotationally screened by matching the rotating ring with the screen and the material guide frame; and the screened grains can be sent back into the supporting bin again to be smashed again, so that the grain smashing effect and smashing efficiency are improved.

The invention belongs to the technical field of agricultural machinery, and discloses a silage maize harvester material chopping, rubbing and grain crushing system which comprises a frame, a working mechanism comprises a working box arranged on the frame, a working block is arranged in the working box, a working disc is rotationally arranged in a working cavity in the working block, and a chopping assembly and a grinding and rubbing assembly are arranged on the working disc; the feeding mechanism comprises a feeding box communicated with the working box, a feeding assembly is arranged in the feeding box, and the feeding assembly is in transmission connection with the working disc; the discharging mechanism comprises a discharging box which is arranged on the frame and communicates with an outlet in the bottom end of the working box, and a discharging assembly used for discharging materials is arranged in the discharging box. The silage processing device is compact in structure and convenient to use, silage materials of a mobile phone can be cut up, ground, kneaded and crushed, the processed silage materials are fermented more evenly, the fermentation speed is higher, and the quality of the silage materials is improved; meanwhile, the feeding and discharging stability of the silage materials can be improved, feeding and discharging blockage of the silage materials is avoided, and the working efficiency of equipment is improved.

The invention discloses a Daqu fragrant multi-grain crushing short-time grain moistening micro-cooking fermented grain adding fermentation brewing process, and belongs to the technical field of white spirit brewing. According to the process, through multi-grain proportioning, two-time short-time high-temperature grain moistening, low-pressure micro-cooking and saccharification fermented grain adding for regulating and controlling fermentation, the problems of grain fragrance loss, high energy consumption, poor southern environment adaptability and the like caused by traditional single-grain long-time grain moistening and cooking are solved. Experimental data show that compared with a traditional process, the process has the advantages that the wine rate is increased by 8.5-18.8%, the ethyl acetate content is increased by 12-45%, and fusel oil is reduced by 10-40%. The raw liquor has the characteristics of strong grain fragrance, mellow, sweet and soft taste and harmonious ester fragrance, the comprehensive effects of ester extraction, impurity reduction, aroma enhancement, quality improvement, energy conservation and consumption reduction are achieved, and the method is suitable for high-quality production of the Daqu fen-flavor liquor.

The invention discloses granule crushing equipment for feed preparation, and particularly relates to the technical field of granule crushing equipment.The granule crushing equipment comprises a material crushing barrel, the rear portion of the upper end of the material crushing barrel is fixedly connected with a crushing structure communicating with an inner cavity of the material crushing barrel, and a primary screening structure is arranged in the middle of the inner cavity of the material crushing barrel; a secondary screening structure is arranged at the lower end of the primary screening structure and the lower portion of the inner cavity of the material crushing barrel, and the lower end of the material crushing barrel is fixedly connected with a discharging structure communicating with the inner cavity of the material crushing barrel. According to the grain crushing equipment for feed preparation, grain grains in the processing barrel are preliminarily crushed through cooperation of the first motor and the crushing assembly, the grains meeting the specified size are matched with a stirring scraper through an isolation net to be fed into the material crushing barrel, and the grain grains are processed into fine and dense grains through multiple screening and crushing; the fine degree is improved, the crushing time under the same precision is shortened, meanwhile, the production efficiency is improved, and the influence of uneven granularity on the subsequent processing process and the animal absorption effect is reduced.

The utility model discloses a grain pulverizer convenient to maintain, and relates to the technical field of grain processing, the grain pulverizer comprises a machine body and a lifting mechanism arranged outside the machine body, the lifting mechanism comprises a working assembly and a rotating assembly, the working assembly comprises a shell, the outer wall of the machine body is fixedly connected with the shell, and the rotating assembly is fixedly connected with the shell. The feeding pipe and the reflux pump are connected with the machine body and the shell, after grains are smashed, the smashed grains are conveyed into the shell from the feeding pipe through the reflux pump, then the motor operates to drive the rotating disc to rotate, and the belt and the hopper rotate synchronously to lift and convey grain powder into the discharging pipe and the discharging hopper. Wherein fragments which are not crushed completely cannot fall into the discharging pipe due to the overweight of the fragments, the fragments can flow back into the machine body from the feeding pipe to be crushed again, and the problems that the feeding pipe is blocked and discharging cannot be performed due to the situation that feeding cannot be performed and overstocking is excessive, and the efficiency is too low due to the too low discharging speed are solved.

The utility model relates to the field of harvesting machinery, and discloses a combined concave grid and a harvesting machine.The combined concave grid comprises a round steel concave grid body and a punching concave grid body which are connected front and back in the axial direction, and the round steel concave grid body comprises a plurality of round steel bars which are sequentially arranged at intervals in the circumferential direction; the punched concave grid includes a panel extending in a circumferential direction and a plurality of punched holes formed in the panel. The combined concave grid has the advantages that the threshing separation rate is high, the grain breakage rate is low, good balance can be achieved between the separation rate and the breakage rate, threshing performance is optimized, threshing loss is reduced, user requirements are better met, adaptability and universality are high, and the like.

Starch cereal grains such as sorghum or wheat, corn, rice, millet, highland barley, buckwheat and the like are used as raw materials, reinforced low-temperature yeast is used as a leavening agent, an underground microporous earthenware brick pit is used as a fermentation container, and the fermentation container is used for fermenting the raw materials to obtain the heap-free low-temperature fermented elegant Maotai-flavor liquor. The high-quality elegant Maotai-flavor liquor is brewed by the following procedures: crushing raw grains, adding water to moisten the grains, steaming the grains for gelatinization, adding fragrant grains, blowing for cooling, adding yeast, fermenting in a pool, distilling to take liquor and the like through a continuous cropping method and a one-time clean round-round fermentation process.

The utility model relates to the technical field of motors, and discloses a motor device applied to grain crushing, which comprises an output shaft, a mounting shell is sleeved at the right end of the output shaft, and a cooling device is arranged in the mounting shell. According to the motor device applied to grain crushing, by arranging a first fan, a protective shell, a first gear, a second fan, a rotating shaft, a second gear and a third fan, when an output shaft rotates, the output shaft drives the third fan and the first fan to rotate, meanwhile, the output shaft drives the first gear to rotate, and the first gear drives the second gear, the rotating shaft and the second fan to rotate; an air body flows into the mounting shell from the right side of the mounting shell and is discharged from a through hole in the top shell, so that the interior of the motor is conveniently cooled; by arranging the filter screen, the rollers, the support, the protrusions and the springs, the filter screen is used for filtering air, meanwhile, the output shaft drives the support and the rollers to rotate, the rollers impact the protrusions, and the filter screen swings left and right through the elastic force of the springs.

The invention relates to the technical field of sand blasting equipment control, in particular to a control system and a control method of a compressed air type sand blasting machine, which are used for solving the problems that the existing system cannot sense the coupling deviation among the blasting kinetic energy, the sand-gas mass ratio and the nozzle pressure difference in real time, the surface treatment quality fluctuation is easily caused, and the sand blasting efficiency is low. The problems of nozzle overload or abrasive material crushing are possibly caused; according to the method, the sand blasting pneumatic self-correction module is fused with a sand blasting pneumatic-impact physical mechanism, a combined state space is constructed, and based on actual spraying kinetic energy, the sand-gas mass ratio and the deviation between the front-back pressure difference of the nozzle and the expected state, accurate recognition of multi-dimensional working condition abnormity is achieved; in a safe action space limited by air source stability, nozzle tolerance limit and a sand grain breaking threshold value, pneumatic parameter set values are adaptively corrected through dynamic strategy learning, and risks such as nozzle overload or abrasive material breaking are effectively avoided while it is guaranteed that the sand blasting kinetic energy and the proportion are always in the optimal interval.

The invention discloses an experimental mouse grain crushing device with a multi-cavity structure, and relates to the technical field of mouse grain processing, the experimental mouse grain crushing device comprises a pre-crushing bin, a conveying bin and a crushing bin, the conveying bin is fixedly connected to the bottom of the pre-crushing bin, the crushing bin is fixedly connected to the bottom of the conveying bin, and two pre-crushing rollers are rotatably connected to the interior of the pre-crushing bin; the back face of the pre-crushing bin is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with the rear end of one of the pre-crushing rollers, the anti-blocking mechanism is arranged in the pre-crushing bin, and the anti-blocking mechanism comprises two transverse supporting beams fixedly connected to the two sides of the bottom end in the pre-crushing bin; and a vertical frame is fixedly connected to the bottom end of the interior of the pre-crushing bin, a reset spring is fixedly connected to the upper end of the vertical frame, and a connecting frame is fixedly connected to the front end of the reset spring, so that the problem that mouse food is prone to rolling when making contact with the roller surface, and mouse food pre-crushing treatment is affected is solved.

The present invention discloses a tubular reactor unit and system, which is particularly used for gas-liquid-solid multiphase reactions, accompanied by crystal particle products, and the reaction conditions involve high temperature and high pressure reactions. The reactor mainly includes a jet mixer, a tubular reactor, a gas-liquid separation buffer tank, a circulation pump, and a crystal crusher. Under the action of the circulation pump, the mother liquor circulates in the tubular reactor and the gas-liquid separation buffer tank to control the flow state and residence time. The tubular reactor is a coil-type jacketed reactor with a heat exchange function, and the jet mixer has the characteristics of multiple input ports and microbubble generation function. The crystal crusher can fully crush the crystal particles in the circulating mother liquor. The present invention adopts a combination of local single circulation and global multi-circulation, combined with microbubble generation technology, in-tube turbulence technology, and grain crushing technology, which greatly shortens the length of the traditional tubular reactor and can achieve fully enclosed, continuous, high conversion rate, and rapid production.

The utility model relates to the technical field of superfine grinders, and discloses a grain superfine grinder capable of completely refining, which comprises a superfine grinder main body and a discharge end, the discharge end is arranged on one side of the superfine grinder main body, a screening box is arranged on one side of the superfine grinder main body, the discharge end is connected into the screening box, and the discharge end is connected into the screening box. The discharging end is connected into the screening box, so that crushed grains enter the screening box, the qualified crushed grains are filtered by the filter plate and then discharged, the unqualified crushed grains are retained on the filter plate, the filter plate is driven by the servo motor to rotate, the unqualified grains are conveyed into the grinding box by the filter plate, and the crushing efficiency is improved. According to the grain crushing device, the two round rollers are arranged, unqualified grains are ground by the two round rollers for secondary crushing and then discharged after crushing, the problems that the grain granularity is not uniform, the crushing efficiency is low and the like are solved, and particularly the problem that when the grains are subjected to superfine crushing, secondary crushing is inconvenient when the crushed grains are not uniform is solved.

The vinasse smashing device and screening structure comprises a main box body, a feeding opening is formed in the upper portion of the main box body, a first smashing box body is fixedly connected to the upper side of the interior of the main box body, two smashing rollers are rotatably connected to the interior of the first smashing box body, annular blades are welded to the outer sides of the smashing rollers, and the annular blades are welded to the outer sides of the annular blades. And the rear side of the first crushing box body is fixedly connected with a motor for driving the crushing rollers to rotate. According to the utility model, the first crushing box body is fixedly connected to the upper side in the main box body, and the two crushing rollers with the annular blades are arranged in the first crushing box body, so that primary efficient crushing of vinasse is realized, and the contact area and the shearing force are greatly increased by utilizing high-speed rotation of the crushing rollers and sharp edges of the annular blades in the design; therefore, the crushing efficiency is improved. And due to the continuous action of the blades in the crushing process, uniform and fine crushing of the vinasse is ensured, large particle residues are avoided, and the uniformity and applicability of subsequent treatment are improved.

The invention belongs to the field of numerical analysis of plastic forming, and particularly discloses a large-size grain crushing and refining unified constitutive model and a construction method thereof.The construction method comprises the steps that a sample is subjected to a multi-pass thermal compression simulation experiment, and a true stress-strain curve and microstructure data, namely standard values, are obtained; establishing a large-size grain crushing and refining unified constitutive model which comprises a grain crushing critical condition, a grain crushing degree evolution model, an equivalent shear strain evolution model, a dislocation density evolution model and a grain size evolution model; the critical condition of grain crushing is as follows: when the accumulated shear strain exceeds the critical shear strain, the grains are crushed, and the accumulated shear strain is determined according to the direction change of the loading shaft; and constructing a target function based on the deviation between the standard value and the simulation value, and solving through a genetic algorithm to obtain unified constitutive model parameters. The invention provides a solution for microstructure prediction, mechanical property control and processing technology formulation of the large-size grain alloy hot working blank.

The invention discloses a forging method of a fine grain copper ingot, which combines different forging processes, carries out three times of upsetting forging and one time of radial precision forging on the copper ingot, controls the heating temperature and the heat preservation time, and carries out multiple times of forging at different temperatures, so that the obtained copper ingot blank has an excellent grain crushing effect; the internal structure is uniform; and grains are fine.

A method and device for monitoring the operating efficiency of a self-propelled silage harvester are disclosed. The method includes: real-time data collection from the field; continuous collection of field operation data via operating condition sensors and data acquisition devices; and real-time transmission of the monitoring data to an on-board processing terminal via an on-board communication device. The on-board processing terminal obtains the power consumption of the operating components based on the received monitoring data and filters the operating condition data. A data time lag analysis and correction model is established using a material flow sequence model of the header, feed roller, chopping roller, grain crushing roller, throwing fan, and throwing cylinder. Data anomalies are detected; missing data values ​​are filled; the correlation between various variables and operating efficiency is detected, and a univariate linear model is constructed; an operating efficiency model is constructed, establishing a data model of operating efficiency and the power of each component; the main factors affecting operating efficiency are identified, and a multiple linear regression operating efficiency detection model is established. This invention also discloses a device for monitoring the operating efficiency of a self-propelled silage harvester.

A silage harvester (1), comprising a header assembly (10), a feeding assembly (20), a chopping assembly (30), a grain crushing assembly (40), a throwing cylinder (60), a processor (70) and a controller (80), which are in sequential communication with one another, and further comprising a material conveying gap adjusting device and a gap adjusting device of the grain crushing assembly, wherein an image acquisition device (61) is provided in the throwing cylinder, and the image acquisition device, the crushing assembly and the controller are communicatively connected to the processor; and the material conveying gap adjusting device comprises a mounting rack (100), a movable blade assembly (200), an adjusting assembly (300), a fixed blade assembly (400), a bottom plate assembly (500), and a connecting rod assembly (600). The silage harvester can evaluate whether the crushing degree of grains reaches a specific purpose in real time, and can accordingly adjust a gap between a movable blade cutting edge and a fixed blade cutting edge and a gap between the movable blade cutting edge and an arc-shaped bottom plate, thereby reducing unnecessary energy consumption. Further disclosed is a control method for the silage harvester.

The invention discloses a preparation method of a raw material bar for a W-Nb alloy single crystal. The method comprises the following steps: 1, mixing W powder and FNb-1 powder, pressing, and carrying out vacuum high-temperature sintering to obtain a W-Nb alloy sintered bar; secondly, a W-Nb alloy cast ingot is obtained after electron beam smelting; thirdly, a W-Nb alloy extrusion bar is obtained through extrusion machining; fourthly, a W-Nb alloy electrode bar is manufactured after heating and forging; and 5, carrying out pre-purification and grain amplification by adopting an electron beam zone melting furnace to prepare the raw material bar for the W-Nb alloy single crystal. The method combining electron beam melting, extrusion and forging hot working and electron beam zone melting is provided for the first time, alloying of a material system and removal of impurity elements in the material are achieved, material grain breaking and uniform distribution of structures are promoted, deep purification is conducted again, grain inoculation and growth are promoted, subsequent growth is facilitated, and a single crystal structure is formed. The preparation process is simple, easy to implement and suitable for the fields of spaceflight, nuclear energy and the like.

The utility model belongs to the technical field of grain crushing, and particularly relates to a grain crusher for grain processing, which comprises a bottom plate, a square frame is fixedly mounted at the top of the bottom plate, an inner cavity of the square frame is connected with a barrel through a rotating component, and a crushing component for crushing grains in various modes is arranged in the inner cavity of the barrel. According to the grain smashing device, the smashing assembly is arranged, so that the effect of smashing grains in multiple modes is achieved, the grains are smashed in multiple modes, and then the grain smashing efficiency can be improved to a certain degree. And besides, by arranging the rotating assembly, the grains can be turned over in the barrel, then the grains can be comprehensively crushed, and the crushing efficiency of the grains is further improved.

The utility model discloses a coarse grain crushing device which comprises a crushing machine body, a plurality of locking universal wheels are arranged at the bottom of the crushing machine body, a feeding hopper and a material guiding frame are arranged on the crushing machine body, and two second connecting plates arranged front and back are fixedly installed on the side wall of the feeding hopper. A shielding mechanism is arranged between the two second connecting plates, a fixing mechanism is arranged on the side wall of the feeding hopper, the fixing mechanism extends into the shielding mechanism and abuts against the inner side wall of the shielding mechanism, a first connecting plate is fixedly installed at the top of the crusher body, and a rotating mechanism is arranged on the front side wall of the first connecting plate; and the rotating mechanism is in transmission connection with the shielding mechanism. According to the utility model, the structural design is reasonable, when the crusher is idle, the feed hopper and the guide frame can be shielded and blocked, external foreign matters are prevented from entering the crusher, and the situation that the foreign matters pollute coarse grains when the coarse grains are crushed and processed subsequently is avoided.

The invention relates to a preparation method of a TC4 titanium alloy cold-rolled coiled strip, and belongs to the technical field of titanium alloy production. Comprising the steps that S1, raw materials prepared from chemical components including 5%-7% of Al, 3%-5% of V, smaller than or equal to 0.25% of Fe, smaller than or equal to 0.08% of C, smaller than or equal to 0.01% of H, smaller than or equal to 0.2% of O, smaller than or equal to 0.05% of N and the balance Ti and inevitable impurities are smelted and then subjected to forging cogging, plate blank coating and hot continuous rolling to form a hot-rolled coil, and a cold-rolled raw material is obtained after acid pickling; and S2, the cold-rolled raw materials are rolled twice, 4-7 passes are rolled each time, and a finished product is obtained after vacuum annealing. According to the method, a multi-pass rolling and annealing process is combined, and the TC4 titanium alloy cold-rolled coil strip which is sufficient in microcosmic grain crushing, good in structure uniformity, excellent in surface quality and capable of meeting the national standard requirement in product performance is effectively obtained. The problems of plasticity reduction, non-uniform deformation, edge cracking and surface cracks caused by direct cold rolling of the TC4 titanium alloy in the prior art are solved.

The invention discloses a steel rail modification strengthening method based on friction stir processing, which comprises the following steps: removing oxides on the surface of a steel rail through polishing, and wiping the surface of the steel rail; a proper stirring head is selected, the rotating speed, the advancing speed, the downward pressure and the dip angle parameters of the stirring head during stirring friction machining are set in a controller, and a low-heat-input technological parameter combination is selected; rotating the stirring head at a high speed and moving downwards until the downward pressure between the stirring head and the surface of the steel rail reaches a preset value; after the stirring head rotating at a high speed and the surface of the steel rail are pressed tightly, in-situ rotating friction is conducted till the set time is reached; the stirring head horizontally moves in the set advancing direction while rotating, the surface of the key weak area of the steel rail is machined, and grain crushing and structure refining are achieved; after the machining process is completed, the stirring head is pulled back upwards and leaves the surface of the steel rail. According to the steel rail modifying and strengthening method based on stirring friction machining, the technological process is simplified, and operation is convenient and fast.

The utility model discloses a grain crushing mechanism for producing potassium sulfate, which relates to the technical field of potassium sulfate fertilizer production, and comprises a grain crushing machine main body, a feed chute and a discharge chute, the feed chute is arranged at the top end of the grain crushing machine main body, the discharge chute is welded on one side of the lower end of the grain crushing machine main body, a screening structure is arranged in the feed chute, and the discharge chute is welded on the other side of the lower end of the grain crushing machine main body. The screening structure comprises a first screening plate and a second screening plate, the two sides of the first screening plate are fixed to the inner wall of the feeding groove, and a gap exists between the first screening plate and the second screening plate. According to the utility model, cakes in a potassium sulfate fertilizer can be retained on the surface of the screening plate, or the screening plate can screen larger foreign matters, and the situation that the larger foreign matters enter the crusher main body to cause equipment damage, so that the damped and caked potassium sulfate is extruded by the screening plate, and the crushing efficiency is improved can be avoided. Therefore, less potassium sulfate fertilizer is retained between the screening plates, the screened fertilizer can be shaken, and falling of the fertilizer is better facilitated.