117results about How to "Improve rolling precision" patented technology

The invention discloses a device and method for rolling a laser stereo formed part layer by layer. The device comprises a numerical control system, a working table, a base plate, laser powder coaxialnozzles located above the base plate and a rolling device. By adopting the scheme that the numerical control system controls the rolling device to roll a metal deposition layer, the rolling frequencyand rolling deformation of a rolled area can be freely adjusted, the problems of high residual stress and severe warping deformation produced due to the high temperature gradient in the laser stereo forming process of the part are solved, and meanwhile by means of the rolling force of rollers, grains are refined, dislocation is increased, cracks are reduced, and part compactness is improved. The size precision and mechanical property of the laser stereo formed part can be improved, the metal part with the high quality is formed, and follow-up machining treatment for the part is reduced.

The invention discloses a hot rolling method for a wide and thin size high-strength cold-rolled base plate for an automobile. After continuous casting billets are assembled in a heating furnace in a hot state, the Cu accumulation amount of iron oxide scales and steel substrates is reduced by adopting high-temperature preheating and high-temperature rapid heating technologies; after rough rolling, the thickness of an intermediate billet is reduced, a heat holding cover is used for reducing temperature drop and temperature differences of all parts, so that the finish rolling entry temperature of the intermediate billet is increased; and loads of all racks for finish rolling are reduced, and the stability of finish rolling is improved. In the process from finish rolling to steel belt coiling, a controlled rolling and controlled cooling technology is adopted, so that the cold-rolled base plate has excellent uniformity between the shape and the structure property. According to the method, the cold-rolled base plate with the thickness of 1.5-2.5 mm and the width of 1650-2000 mm can be obtained; the convexity degree of a steel belt is controlled to be in a range between 45-15 mu m and 45+15 mu m; the straightness is controlled to be 30I; the thickness accuracy is in a range between -30 mu m and +30 mu m; the structure property of different edges of the head, the middle, the tail of the steel belt is uniform; and the yield and the production efficiency of the wide and thin size high-strength cold-rolled base plate can be increased and improved, so that the cold-rolled base plate meeting the requirements of the actual product quality and the performance is provided for steel plates with the grade of 450-590 MPa for automobile covering parts.

The invention discloses a three-roller inclined rolling forming method of rail vehicle axles. The method is characterized in that rods are heated and fed into a three-roller inclined rolling machine through an axial pushing device; three inclined rollers are engaged with the rods at the same time, and drive the rods to rotate; meanwhile, the axial pushing device pushes the rods to axially move ata constant speed; a radial driving mechanism controls radial movement of the inclined rollers according to diameter requirements of rail vehicle axles needing to be machined; when the rods axially move to contact with an axial guide device, the axial guide device tows the rods to continuously move axially at a constant speed; meanwhile, the rods are deviated from the axial pushing device; and after machining is finished, large-diameter long step shafts-rail vehicle axles are obtained. The method has the advantages of simple mold manufacturing, uniform distribution of force on the surfaces of rolled parts, capability of effectively reducing wear of the rollers in the inclined rolling process, capability of realizing light construction of the rolling machine and effective prolonging of the service life of the rolling machine.

The invention provides a novel parameter setting integrated system of a twenty-high rolling mill control technology. The novel parameter setting integrated system of the twenty-high rolling mill control technology comprises a rolling schedule optimization setting module, an elastic roll diameter roll-arranging module, an energetic parameter calculating module and a mill roll system. After the incoming material thickness, the finished product thickness, the strip material width, the maximal rolling force, a maximal rolling reduction ratio and the work roll diameter are input into the rolling schedule optimization setting module, the rolling pass, the total rolling reduction ratio, the rolling reduction ratio of each pass, the rolling force, the forward tension and the backward tension, the rolling speed, the rolling power and the rolling pass outlet thickness are output; and after the roller diameter compensation eccentric distance, the rolling reduction adjusting eccentric distance and the rolling pass outlet thickness are input into the elastic roll diameter roll-arranging module, the work roll diameter, a first middle roll diameter, a second middle roll diameter and the rolling reduction adjusting angle are output. According to the novel parameter setting integrated system of the twenty-high rolling mill control technology, setting of parameters of the rolling mill control technology can be conducted by adopting the incoming material thickness, the finished product thickness and the like without the need of accumulating long-term production data.

The invention discloses a deep-drawing production technique for stainless steel shuttle-shaped artware. The deep-drawing production technique for the stainless steel shuttle-shaped artware comprises the steps of material selection, solid solution treatment, polishing, deep drawing, cutting, cleaning, primer spraying, surface paint spraying and the like. First-time cold deep drawing is conducted on a polished blank, the step of solid solution treatment is conducted after first-time cold deep drawing, then second-time cold deep drawing is conducted, third-time hot deep-drawing correction is conducted on the blank subjected to second-time cold deep-drawing, pressure maintaining treatment is conducted during third-time hot deep drawing correction, and thus the production efficiency and attractiveness degree of the shuttle-shaped artware are effectively improved.

The invention provides a hot rolling mill rolling control system used for improving rolling accuracy, and relates to a hot rolling mill control system. The hot rolling mill rolling control system used for improving rolling accuracy solves the problems that an existing hot rolling mill control system can not realize constant roll bit rolling under manual control, so that control accuracy is low. The hot rolling mill rolling control system used for improving rolling accuracy can detect the displacement of a piston inside a hydraulic cylinder through a displacement sensor, and compares detected displacement signals with roll bit control signals to obtain a displacement difference, a servo valve carries out conversion between electrical signals and flow signals on the received displacement difference, oil feeding amount of an oil tank to the hydraulic cylinder is controlled, the displacement of the piston of the hydraulic cylinder is further accurately controlled, constant roll bit rolling is finally achieved, and the rolling accuracy of a hot rolling mill is improved by 40%.

The invention discloses a preparation method of a micro order niobium foil. According to the method, three rolling process reversible type rolling is performed on a niobium belt by utilizing a Sendzimir twenty-roller cold rolling machine, the obtained niobium foil is cleaned, and subjected to edge splitting and heat treatment after each rolling process reversible type rolling, and finally, the micro order niobium foil is obtained. According to the method, three rolling process rolling is performed on the niobium belt with the width being 100 mm to 120 mm and the thickness being 0.15 mm to 0.2mm by adopting the Sendzimir twenty-roller cold rolling machine. Due to the beneficial effects that the Sendzimir twenty-roller cold rolling machine is large in rolling force and high in rolling precision, by designing a reasonable rolling process, the thickness precision of the micro order niobium foil is greatly guaranteed; meanwhile, through a reasonable annealing process, the structure internal stress of the niobium foil is eliminated in time, influences on the niobium foil in the rolling process are reduced, and finally, the micro order niobium foil with the thickness being 0.007 mm to 0.009 mm is obtained.

The invention discloses a metal foil rolling device which comprises a base. Two support plates are symmetrically arranged on the base, a rolling space is formed between the two support plates, adjusting open holes are formed in the support plates, a large upper power roller, a small upper driving roller, a small lower driving roller and a large lower power roller are sequentially arranged in the rolling space from top to bottom, a first bearing seat is arranged at two ends of the large upper power roller and two ends of the large lower power roller respectively, a second bearing seat is arranged at two ends of the small upper driving roller and two ends of the small lower driving roller respectively, the first bearing seats and the second bearing seats are arranged in the adjusting open holes, inner threaded sleeves are further arranged on the support plates above the adjusting open holes, threaded rods are arranged in the inner threaded sleeves, one end of the threaded rod is in abut joint with the corresponding first bearing seat of the large upper power roller, the other end of the threaded rod is connected with a worm wheel, and the worm wheels are connected with a pushing motor through worms. The metal foil rolling device is compact in structure, convenient to adjust and high in production precision.

The invention discloses an asynchronous cold rolling forming process of an aluminum alloy stainless steel composite plate. The process comprises the following process steps: 1, rolling and compoundinga stainless steel plate and an aluminum alloy plate in an asynchronous rolling mode, and 2, after asynchronous rolling, diffusing and annealing the composite plate, specifically, in the step 1, online heating is carried out on the opposite surface of the composite plate surface of the stainless steel plate, online cooling is carried out on the opposite surface of the composite plate surface of the aluminum alloy plate online, and the heating temperature is 350 DEG C-850 DEG C; the temperature of the composite plate surface of the stainless steel plate from which the composite plate is rolledis lower than 650 DEG C, and the temperature of the composite plate surface of the aluminum alloy plate from which the composite plate is rolled is lower than 300 DEG C; the rolling reduction rate is20%-90%; the different speed ratio of a roller for asynchronous cold rolling is 1.05-1.50; the thickness ratio of the aluminum alloy plate to the stainless steel plate is 1.5-4.0; and in the step 2, the annealing temperature is 250 DEG C-500 DEG C and the annealing time is 15-120 min. The single-side online heating process for rolling the composite plate is creatively provided so as to improve theinterface bonding strength of the composite plate and realize rolling compounding in an interface semi-melting state.

The invention discloses a hot drawing technology for 410# steel cylinders. The hot drawing technology comprises the steps of material selection, die fixing, annealing, polishing, drawing, closing-in, cleaning and the like; a polished blank is subjected to primary hot drawing, annealing, secondary hot drawing and tertiary hot drawing sizing in sequence, and pressure is maintained in the third hot drawing sizing process. The overall quality of the steel cylinders is ensured through repeated drawing and annealing treatment.

The invention provides a machining technology of a seat ring for an engineering wheel. The machining technology comprises the steps of section steel rolling, double dimension shearing, edge coiling, aligning and spot welding, flash butt welding, welded joint milling, finishing, knurling, turning, packaging and the like. By means of the machining technology, the material utilization rate and welding quality can be improved, and the production cost can be reduced. In the process of the machining technology, a short stress rolling mill controlled by a microprocessor is adopted for rolling, and the rolling precision is high; high-pressure water is adopted for dephosphorization, and the surface quality is good; a punching machine is adopted for double dimension shearing, and the shearing efficiency is high; during turning, a robot and numerical control machine tool full-automatic assembly is adopted for machining, omni-directional machining of workpieces can be achieved, the equipment assembly is operated by only one person, manpower is saved, electricity consumption and the manual cost are reduced, and the machining efficiency can be improved by 3 times; and a dedicated knurling machine is adopted, and the knurling efficiency is 6-8 times that of a common lathe.

The invention discloses a universal rolling device and a rolling method for bulbous flat steel. The universal rolling device includes a universal rolling mill unit. The universal rolling mill unit is composed of 3-6 universal rolling mills, and any universal rolling mill has an upper level Roller (1), lower horizontal roller (2), operation side vertical roller (3) and transmission side vertical roller (4); the two ends of the lower horizontal roller (2) are chamfered so that the upper horizontal roller (1), lower The horizontal roll (2), the operation side vertical roll (3) and the transmission side vertical roll (4) are combined together to form a combined spherical flat steel rolling hole, and the shape of the combined spherical flat steel rolling hole is two spherical flat steel In the shape of steel combined, the webs of the two bulb flat steels are connected together to form a combined web (6), and the ball ends are respectively located on the same side of the connected web as the left leg (5) and the right leg (7). The invention can roll out the axisymmetric combined spherical flat steel, and has the characteristics of high rolling precision, significantly increased rolling batch size and less roll consumption.

The invention discloses a drawing process for a steel cylinder made of 410 stainless steel. The drawing process comprises steps of material selection, annealing, polishing, drawing, closing-up, washing and the like, wherein polished blank is subjected to first-time cold drawing, annealing is performed after first-time cold drawing, and then second-time cold drawing is performed; the blank subjected to second-time cold drawing is subjected to third-time hot drawing and shaping, and pressure-maintaining processing is performed during third-time hot drawing and shaping. The overall quality of the steel cylinder is guaranteed through multiple times of drawing and annealing processing.

The invention discloses a linkage adjusting mechanism for plate rolling machine working rollers. The linkage adjusting mechanism comprises a side roller linkage mechanism body. The side roller linkage mechanism body comprises a first linkage arm and a second linkage arm. The first linkage arm is clamped into the second linkage arm and is in rotating connection with the second linkage arm. The first linkage arm and the second linkage arm are provided with moving bases in an embedded mode correspondingly. Side roller bases are formed in the corresponding moving bases. The first side roller and the second side roller are installed in the corresponding side roller bases. A lower roller base is arranged at the coincided position of the first linkage arm and the second linkage arm, and the lower roller is installed in the lower roller base. The moving bases are connected with the first linkage arm or the second linkage arm through corresponding moving base drive mechanisms. The linkage adjusting mechanism for the plate rolling machine working rollers is compact in structure, stable and reliable. Meanwhile, the first side roller and the second side roller can be adjusted in the front-back direction and the up-down direction, and the flexibility, adaptability and universality of equipment are enhanced; and meanwhile, the adjusted first side roller and second side roller are positioned, and thus the rolling precision is further improved.