578results about How to "Improve rolling efficiency" patented technology

The invention provides a preparation method for a multilayer dissimilar metal composite ultra-thin strip. The preparation method includes the process steps that (1) different metal materials are synchronously cold-rolled for first thinning; (2) metal thin strips are polished and cleaned; (3) the upper surfaces and lower surfaces of two or more metal thin strips are closely attached; (4) two-roll synchronous cold rolling is conducted on dissimilar metal combined strips; (5) the upper surfaces and lower surfaces of 2-10 dissimilar metal thin strips subjected to preliminary combination are closely attached and then the procedures of the step (1) to the step (4) are repeated 2-10 times; (6) reversible four-roll synchronous cold rolling is conducted on a multilayer dissimilar metal composite thin strip; and (7) reversible four-roll asynchronous cold rolling is conducted on the multilayer dissimilar metal composite thin strip, and the multilayer dissimilar metal composite ultra-thin strip with the thickness being 0.01 mm-0.02 mm is obtained. According to the method, the selection range of the metal materials is wide, the requirement for equipment capacity is low, and the surface quality of the ultra-thin strip can be improved remarkably; besides, production resources are saved, production cost is reduced, and the method is suitable for large-scale industrial production.

A warm machining technology for making Ti or Ti-alloy pipe includes such steps as machining surface of pipe blank, preheating to a temp between ambient temp and recrystallizing temp, high-speed rolling at temp higher than recrystallizing temp, and fast cooling. Its advantages are simple process, high utilization rate of material, low cost and high quality.

The invention relates to a method for preparing oriented silicon steel with an asymmetrical rolling technique for a roughing mill or a finishing mill. The method is characterized in that an asymmetrical rolling mode is comprehensively introduced in the rough rolling and finish rolling process of hot rolling: 1, all passes or the first two passes of the rough rolling stage adopt asymmetrical rolling and all passes or the last pass of asymmetrical rolling of the finish rolling; and 2, all passes or the first two passes of the rough rolling stage adopt asymmetrical rolling and all passes or the first pass and the last pass of asymmetrical rolling of the finish rolling. The method is as follows: 1) when the rotation speeds of working rolls are same, the asymmetry is realized through the difference of the diameters of a top working roll and a bottom working roll; 2) when the diameters of the top working roll and the bottom working roll are same, the asymmetry is realized through the difference of the rotation speeds of the working rolls; 3) when the diameters of the top working roll and the bottom working roll are same and the rotation speeds are same, the asymmetry is realized by changing the friction coefficient of the top and bottom working roll surfaces and a rolling piece; the circumferential speed ratio of the top working roll and the bottom working roll of an asymmetrical mill is 1:1.01-1:1.30, the total reduction rate of the rough rolling is at least 85 percent, and the pass reduction rate is 20-40 percent; and the total reduction rate of the finish rolling is at least 90 percent, and the pass reduction rate is 20-40 percent. The oriented silicon steel comprises the following ingredients by weight percent: 0.03-0.08 percent of C, 2.8-6.5 percent of Si, 0.05-0.2 percent of Mn, 0.013-0.035 percent of S, 0.01-0.05 percent of Al, 0.045-0.01 percent of N, at most 0.03 percent of P, 0.05-0.5 percent of Cu and the balance of Fe and other impurity elements.

A warm machining technology for making Cu or Cu-alloy pipe includes such steps as machining surface of pipe blank, preheating to a temp between ambient temp and recrystallizing temp, high-speed rolling at temp higher than recrystallizing temp and fast cooling. Its advantages are simple process, high utilization rate of material, low cost and high quality.

A rolling bearing fixing device includes at least one bearing having mutually rotatable inner and outer rings, a housing having at least one fitting hole into which the bearing is fitted and a bolt insertion hole, a pair of fixing plates having at least one large-diameter hole and a bolt insertion hole; and a bolt inserted from one axial end into the bolt insertion hole of one fixing plate, the bolt insertion hole of the housing, and the bolt insertion hole of the other fixing plate, and connects the housing with the pair of fixing plates. Both axial end parts of the outer ring are held by the pair of fixing plates in the axial direction, the inner ring is positioned further inwardly of the large-diameter hole of the fixing plates in the radial direction and the inner ring is rotatable with respect to the fixing plates.

The invention belongs to the field of titanium-steel composite plate preparing and machining, and particularly relates to a preparation method for a titanium-steel composite plate with copper as a middle layer. The preparation method includes the following steps that a, assembly is conducted, wherein symmetrical assembly is conducted according to the sequence of a steel plate, a titanium plate, copper foil and a steel plate, and the steel plate, the titanium plate, the copper foil and the steel plate are welded together to form a combined blank; b, heating is conducted, wherein the combined blank is heated for 2 hours to 6 hours at the temperature of 760 DEG C to 860 DEG C; c, rolling is conducted, wherein at least two-pass rolling is conducted on the heated combined blank, the total rolling deformation is larger than or equal to 80%, and the rolling speed ranges from 0.1 m/s to 1 m/s; and d, finishing is conducted, wherein a titanium-steel interface is separated to obtain the titanium-steel composite plate. The method is simple in process, the situation that iron is dispersed into titanium to form Ti/Fe brittle phases can be blocked, the obtained titanium-steel composite plate is good in plate shape and good in combining effect, and the combining strength is larger than 190 MPa.

The invention provides a hot-rolled multiphase steel plate and a preparation method thereof. The invention has the advantages of the economical, reasonable, environmental-friendly design of steel component, being favorable for effective utilization and recycling of resources, being implemented and controlled easily, the simple and convenient process control, the high strength of steel plate and the good performance of cold bending and welding. The thickness of plate is 2.5 to 6 milimeter, the tensile strength of the hot-rolled steel plate is larger than 1000Megapascal, the yield strength is greater than or equal to 500Megapascal, the yield ratio is low, the minimum yield ratio is equal to 0.51 and the maximum is not higher than 0.80, the elongation A80 i.e. the sample of 80 milimeter of JIS13A standard distance is greater than or equal to 11 percent and the highest value reaches 20 percent, and the longitudinal direction and the transverse direction of cold bending meets the requirement of not cracking when d is equal to 4t. The microstructure is mainly Bainite and Martensite of higher than 90 percent and few ferrite of possible residual Austenite.

The invention discloses a process for manufacturing a spoke plate of a wheel type construction machinery vehicle and a special vertical winding machine therefor, and belongs to the technical field of construction machinery. The process comprises the following working procedures: heating, wherein strips are heated to be between 650 and 750 DEG C to form heating strips; winding, wherein the heating strips are fed into the vertical winding machine and the strips are wound into vertical spiral blanks; cutting, wherein the spiral blanks are cut into separate blanks according to the specification of a prefabricated spoke plate; pressing spots, wherein cuts of the separate blanks are aligned for spot welding; welding, wherein the separate blanks after the spot welding are welded to form a spoke plate blank; finishing, wherein the dimensional precision of the welded blank is finished to form the spoke plate blank; and machining, wherein the spoke plate blank is machined to manufacture a spoke plate finished product. The invention is suitable for manufacturing the spoke plate of the wheel type construction machinery vehicle.

The invention discloses a method for predicting strip surface coefficients of heat transfer in hot rolling procedures. The method includes predicting strip surface coefficients of heat transfer by the aid of a finite-element model and heat transfer modifier formulas; determining the strip surface coefficients of heat transfer according to comparison values of measured temperatures and computed temperatures of strips. The method has the advantages that the method is specially used for predicting the strip surface coefficients of heat transfer in the strip hot rolling procedures, change of the strip surface coefficients of heat transfer in the integral rolling procedures can be acquired, information is detailed and accurate, the strip surface coefficients of heat transfer are high in prediction precision, and setting and optimizing parameters can be provided for the rolling procedures; the method is high in applicability and computational efficiency and is applicable to roughing mills and finishing mills in hot continuous rolling procedures.

The invention belongs to the field of preparation and machining of a titanium-steel composite plate, and particularly relates to a preparation method of the titanium-steel composite plate with copper as a middle layer. The method comprises the following steps: a, assembling: symmetrically assembling according to the sequence of steel plate/titanium plate/copper foil/steel plate, and welding to obtain a combined blank; b, heating: heating the combined blank at 980-1,050 DEG C for 2-6 hours; c, rolling: rolling the heated combined blank for at least two times, wherein the total deformation of the rolling is greater than or equal to 80 percent, and the rolling speed is 0.1-1 m/s; d, refining: separating the titanium-steel interface to obtain the titanium-steel composite plate. The process of the method is simple, the problem of interface oxidation in the preparation process of the titanium-steel composite plate can be solved, the obtained titanium-steel composite plate has a good shape, the binding effect is good, and the binding strength is greater than 260 MPa.

The invention discloses a 900MPa-grade hot-rolled automobile beam steel and a production method thereof. The 900MPa-grade hot-rolled automobile beam steel comprises raw material chemical ingredients in percentage (%) by weight as follows: 0.06 to 0.08% of C, less than or equal to 0.10% of Si, 1.5 to 1.7% of Mn, greater than or equal to 0.005% of S, greater than or equal to 0.015% of P, 0.040 to 0.050% of Nb, 0.07 to 0.09% of Ti, greater than or equal to 40 ppm of N, 0.025 to 0.060% of Als, greater than or equal to 0.002% of H, and the balance of Fe. Yield strength of a hot-rolled steel plate produced by the method disclosed by the invention is greater than or equal to 650 MPa, tensile strength of the hot-rolled steel plate is greater than or equal to 900 MPa, and elongation percentage of the hot-rolled steel plate is greater than or equal to 12%, the steel plate has an excellent plate shape, unevenness of the steel plate is less than or equal to 0.6%, and carbon equivalent w is less than or equal to 0.35%, and the steel plate has excellent welding performance. The method adopts simple process flow, does not need to add any equipment, and has the advantages of mass production, economy, easiness and stable performance.

The invention belongs to the technical field of an unmanned aerial vehicle, and discloses a novel composite rolling attitude control system and method. The control method integrates a principle for adjusting a flight attitude by utilizing a rudder surface and a conventional helicopter tipping tray periodically-pitch-variable principle; by utilizing a redundant control concept, an aerocraft rolling passage is controlled by a rudder system, the auxiliary compensation for the rolling passage is carried out by virtue of a rotary wing system, an airflow direction is limited by virtue of a duct, and the rudder system is controlled; and the control system comprises a controller, a rudder system, a rotary wing system and a duct. The novel composite rolling attitude control system is high in air passing capacity, compact in structure, reasonable in design and capable of realizing automatic hovering and precise attitude control and has advantages of small space size, large effective load, high control response sensitivity, high system stability, high robustness and the like.

The invention relates to the field of preparing of alloy materials, in particular to a pulse current assisting titanium-TiAl composite plate non-sheath rolling method. The pulse current assisting titanium-TiAl composite plate non-sheath rolling method aims at solving the problems that a plate prepared through an existing foil metallurgy method for titanium-TiAl composite plates is small in size, not uniform in thickness, large in component deviation and low in strength and plasticity, and the problems that a sheath hot rolling method is high in cost, complex in technology and high in rolling temperature, and the quality and performance of composite plates need to be further improved are solved. The pulse current assisting titanium-TiAl composite plate non-sheath rolling method includes thespecific steps that firstly, a titanium alloy plate is prepared; secondly, a TiAl alloy plate is prepared; thirdly, non-sheath assembling is conducted; fourthly, pulse current auxiliary hot rolling is conducted; and fifthly, separating and subsequent treatment are conducted, and a titanium-TiAl composite plate can be obtained. The composite plate obtained in the pulse current assisting titanium-TiAl composite plate non-sheath rolling method is good in surface quality, free of oxide layer disengagement, free of edge portion and end portion cracking, uniform and small in plate organization, good in bonding interface and good in mechanical performance.

The invention belongs to the field of machining of metal materials, and particularly relates to an edge-controlling rolling method for a wide magnesium alloy plate. In order to solve the problems of serious edge cracking, anisotropic protrusions and the like of an existing rolling process for the magnesium alloy plate, widening rolling and Mizushima automatic plan view pattern control system (MAS) rolling are recombined and optimized, and a method for determining the prefabricated convexity is given definitely specific to magnesium alloy materials. The convexity of the edge of a rolled piece is prefabricated before cross rolling and axial rolling, so that the flow amount of metal at the edge is improved, and the flaws of the head and the tail of a common rolled piece are compensated. Coordinate deformation of the edge and the middle of the rolled piece with low fracture toughness is achieved during rolling and deformation, and therefore edge cracking is relieved or eliminated, the rolling yield of the wide magnesium alloy plate is improved, and the cost is reduced. Meanwhile, orthogonal rolling is achieved in the axial-cross-axial rolling process, the anisotropic defect in the common rolling process is effectively relieved, and the performance of the materials is improved. By means of the edge-controlling rolling method for the wide magnesium alloy plate, the edge cracking and anisotropic defects during rolling of the wide magnesium alloy plate are effectively relieved or controlled, the yield and the performance of the materials are further improved, and the cost is reduced.

The invention discloses sand grinding equipment. The sand grinding equipment comprises a support, a grinding box, a first rotating shaft, a driving device and at least one grinding roller, wherein the grinding box is mounted on the support; a feed port is formed in the upper part of the grinding box; a discharge port is formed in the lower part of the grinding box; a discharge door is detachably mounted in the position corresponding to the discharge port of the grinding box; the first rotating shaft is rotationally mounted in the grinding box; the driving device is connected with the first rotating shaft and drives the first rotating shaft to rotate; each grinding roller comprises a main grinding roller body and a second rotating shaft, the main grinding roller body is rotationally mounted on the second rotating shaft, the second rotating shaft is mounted on the first rotating shaft through an elastic piece, and the second rotating shaft and the first rotating shaft are perpendicular to each other in the axial direction. According to the sand grinding equipment, the grinding quantity of materials each time can be increased, and the grinding effect of the materials can be guaranteed effectively.

The invention discloses a method for rolling 410S ferrite stainless steel. The method includes the steps of 1, carrying out heating, wherein 410S ferrite stainless steel plate slabs are heated through multi-walking-beam type heating furnaces, the furnace staying time ranges from 180 minutes to 240 minutes, the tapping temperature ranges from 1140 DEG C to 1160 DEG C, and the amount of residual oxygen in the furnaces ranges from 3.0% to 5.0%; 2, carrying coarse rolling, wherein the heated plate slabs are descaled through a plate slab descaling machine to enter a four-roller coarse rolling machine to be rolled seven times to form intermediate slabs, and the reduction rate of each time of coarse rolling ranges from 18% to 30%; 3, rolling intermediate products, wherein after the heads and the tails of the intermediate slabs are cut off through a flying shear cutter, the intermediate slabs enter a steekle mill to be rolled three times to form the intermediate products, the each-time reduction rate of the steekle mill ranges from 32% to 49%, and the temperature of a reeling furnace ranges from 1110 DEG C to 1140 DEG C; 4, carrying out fine rolling, wherein the intermediate products sequentially enter a fine rolling unit to be continuously rolled to be at the finished-product thickness, and the reduction rate of each time of fine rolling ranges from 12% to 28%; 5, cooling finished products. The invention further discloses a system for rolling the 410S ferrite stainless steel. By means of the technological method, the production efficiency is high, the product quality is stable, and the difference between the heads and the tails of steel tape is small.

The invention relates to rapid extraction equipment for a plant coloring agent, in particular to the rapid extraction equipment for the plant coloring agent for the textile. The invention aims to provide the rapid extraction equipment for the plant coloring agent for the textile which is high in extraction efficiency, is sufficiently uniform in rolling compacting, and is capable of timely separating a liquid from plant residues during extraction. The rapid extraction equipment for the plant coloring agent for the textile comprises a bottom plate and the like; the top of the bottom plate is provided with an n-shaped frame, a driving mechanism is arranged on the right side in the n-shaped frame, a rolling compacting mechanism is arranged at the inner top of the n-shaped frame, a first supporting rod is arranged in the middle of the top of the bottom plate, and a box body is connected to the top end of the first supporting rod. According to the equipment, the effects that the extraction efficiency is high, rolling compacting is sufficiently uniform, and the liquid can be separated from the plant residues timely during extraction are achieved; and the driving mechanism works to drive the rolling compacting mechanism to roll and compact the plant to extrude out the juice, and a lifting mechanism enables the plant residues and the extraction liquid to be separated timely, so that theextraction speed is accelerated.