112results about How to "Reduced roll change time" patented technology

A method for a rolling mill to roll round steel with the diameter phi of 120mm and round steel with the diameter phi of 130mm by one roller set includes the ten-pass design of a 650mm rolling mill and a regulating method thereof. The two types of round steel share the first, second, third, fourth and fifth passes and the eighth pass of leader passes. When in rolling of the round steel with the diameter phi of 120mm, the roller gap of the upper rolling line is 6mm, feeding is carried out after 90-degree rotation from the seventh pass to the eighth pass. When in rolling of the round steel with the diameter phi of 130mm, the roller gap of the upper rolling line is regulated to be 11mm, feeding is carried out from the fifth pass to the eighth pass after the sixth pass and the seventh pass arecast off, the third pass and the fifth pass meet the requirement for the entry width of the previous pass in the processes of rolling the round steel with the diameter phi of 120mm and the round steel with the diameter phi of 130mm simultaneously, the eighth pass meets requirements of the round steel with the diameter phi of 120mm and the round steel with the diameter phi of 130mm simultaneously,the width B of the eighth pass meets requirements of the round steel with the diameter phi of 130mm, and the height H thereof meets requirements of the round steel with the diameter phi of 120mm. By the method, the rolling mill can roll the round steel in two specifications by the same roller set, and roller changing frequency and time due to alternating of the two specifications can be reduced.

The invention relates to a lower transmission sealing box used for producing float glass and a roller-changing method thereof. The low transmission sealing box is characterized in that a gear box (1) is connected with a annealing kiln roller-way transmission shaft (1a) and connected with a steering gear (5) in a ground pit through transmission shafts (2, 3), the steering gear (5) is coaxially connected with three steering gears (7) in a ground pit through a transmission shafts (6), a steering gear (7) is connected with a steering gear (14) through transmission shafts (9, 11), and a steering gear (14) is connected with a shaft head of a transition roller (15). The transition roller (15) and a support (13) thereof are made into an integrated unit, and the integrated unit is in cooperated connection with a track in the sealing box. The invention has advantages that a transmission system is arranged in a ground pit, thereby providing full operation space for replacing the transition roller; the transition roller is made into modularized integrated unit, and the integrated unit can be drawn out for on-line replacing, thereby shortening roller-changing time and saving production cost.

The invention provides a basic automation control system for a tandem cold rolling unit with five frames, which comprises a PLC (programmable logic controller ) cluster, an HPC (high performance computing ) controller cluster, a field rolling mill control console, a real-time data acquisition system, a developing and debugging system and a system communication network. By the basic automation control system, automatic roll changing can be realized, roll changing time is shortened, production and maintenance can be carried out easily, and building investment and maintenance cost are reduced greatly. Since a high-speed closed-loop control function is realized, continuously high-speed production on sites is guaranteed. Since a high-speed data acquisition function is realized, the basic automation control system is capable of running safely and efficiently and meeting the requirements to millisecond-level monitoring data during fault analysis of the high-speed closed-loop control system of the tandem cold rolling unit. Since functional units are debugged and controlled to run successfully, structural uniformity of the basic automation control system after modification of programs is guaranteed. The high-speed optical fiber memory map net serves as the communication network, high-speed data exchange is realized by data caching among functional units of the HPC controller cluster, and accordingly high-speed data acquisition of the real-time data acquisition system is realized.

The invention discloses a working roll replacing device for a heavy and medium plate mill. The device comprises two roll replacing trollies, a transverse guide rail arranged outside one side of a mill stander vertically to a central line of the mill, a pair of hydraulic cylinders arranged at the two ends of the transverse guide rail and two cross travelling trollies which can move along the transverse guide rail and are connected to the pair of hydraulic cylinders respectively, wherein the two cross travelling trollies are also provided with a longitudinal guide rail in parallel with the central line of the mill respectively; and the two roll replacing trollies are arranged on the pair of cross travelling trollies respectively and can move along the longitudinal guide rail. The invention also discloses a working roll replacing method for the heavy and medium plate mill, which is executed in the working roll replacing device for the heaving and medium plate mill. The technical scheme of the working roll replacing device and the working roll replacing method for the heavy and medium plate mill of the invention can shorten the roll replacing time of a working roll and achieve high automatic degree so as to fulfill the aim of indirectly improving the production capacity of a unit.

The invention provides a variable-stroke and variable-step-size roll motion alternating method. The method comprises the steps that the roll motion alternating stroke transformation proportion q is obtained; the alternating cycle number i is obtained; according to the alternating cycle number i and the roll motion alternating stroke transformation proportion q, the (i+1)th roll motion alternating stroke W(i+1) is obtained, wherein W(i+1) is equal to q*Wi, wherein Wi is the roll motion alternating stroke when the cycle number is i; the roll motion alternating step size transformation proportion p is obtained; the reverse alternating number j of a working roller is obtained; according to the reverse alternating number j and the roll motion alternating step size transformation proportion p, the (j+1)th roll motion alternating step size S(j+1) is obtained, wherein S(j+1) is equal to p*Sj, and Sj is the roll motion alternating step size when the reverse alternating number is j. According to the variable-stroke and variable-step-size roll motion alternating method, the abrasion uniformity of a roller can be significantly improved, the strip steel shape quality is improved, and the planned order length is increased.

The invention is a cold-bending molding technique of fixing roller arc and changing bend-point position, according to the minimum wall thickness in set product outline, determining angular bending arc of the roller, making all the top rollers in the curves adopt the bending arc, determining the bending molding angle of the raw material plate according to inner circular arcs of the finished products of different wall thicknesses, making the unbended raw material of each angle remained on the bottom pate, making each bending point gradually move toward the bottom plate during roll bending, and finally completing the whole bending process. The molding is natural and smooth, able to effectively resolve the angular microcrack. It saves roller-changing time.

The invention provides a four-roll roll-arranging type profile steel blooming mill, belongs to a metal rolling mill, and particularly relates to a three-roll type steel rolling mill. A rolling mill base is provided with an upper roll a and a lower roll b, the two rolls are the same in length and roll diameter, the roll faces are each provided with 5-7 rolling grooves, and the rolling grooves are the same in position and shape. A middle roll is at least configured with a middle roller body c and a middle roll body d, the middle roll body c and the middle roll body d are the same in structure and provided with rolling grooves, and the rolling grooves correspond to the rolling grooves in the upper roll and in the lower roll. The upper roll a, the middle roll c and the lower roll b are fixed to the rolling mill base from top to bottom according to the primary roll-arranging type of the upper roll a, the middle roll c and the lower roll b, or the upper roll a, the middle roll c and the lower roll b are fixed to the rolling mill base from top to bottom according to the roll-replacing roll-arranging type of the lower roll b, the middle roll c and the upper roll a. The four-roll roll-arranging type profile steel blooming mill has the advantages that the two rolling rolls of the same structure are adopted, the two middle roll bodies of the same structure are adopted, the two rolling rolls are dispatched in an up-down mode to be used in cooperation with the two middle roll bodies, all the rolling grooves of the rolling rolls are fully utilized, the utilization rate of the rolling rolls is increased, and 1/3 the rolling roll cost is saved; when roll-replacing and roll-arranging are conducted, the process of transporting new rolling rolls is omitted, the roll replacing time is saved, and smooth steel rolling production is guaranteed.

The invention discloses a system for producing a ribbed bar by hot rolling, in particular a system for producing the ribbed bar by a quartered hot rolling production line, belongs to the technical field of steel rolling equipment, and provides a production system with relatively low running cost, relatively low equipment investment cost and relatively low fund occupied rate during rolling production. The system comprises at least two rough rolling machine sets, at least two medium rolling machine sets and at least two fine rolling machine sets which are sequentially arranged, wherein rollers are arranged on rolling machines; the rollers arranged on each rolling machine of the rough rolling machine set are flat and straight rollers without rolling slots; and a rolling hole consists of a radial gap between two adjacent rollers on each rolling machine.

The invention provides a method for eliminating a zero error. The method comprises the steps that the zero position calibrated mechanically is recorded; the relative position between a magnetic ring and a magnetic ruler of each channeling roll cylinder is set to be zero; first moving blocks on an operation side are controlled by the channeling roll cylinders to move to the zero position; the first moving blocks are controlled by the channeling roll cylinders to move towards the operation side from the zero position by a preset distance; the first moving blocks are controlled to move towards a drive side to the zero position; and by means of the preset distance, it is ensured that the first moving blocks precisely move to the zero position. Thus, the zero error caused by accumulated gap values of all components can be eliminated, it is ensured that the first moving blocks and second moving blocks can precisely move to the zero position, it is ensured that clamping plate cylinders are in an opened state, a work roll can be replaced safely, rapidly and automatically, and then the roll replacement time is shortened, the work efficiency is improved, and manual operation accidents are avoided.

The invention relates to the technical field of metal plastic forming processes and equipment, and provides a double-rotating-shaft cantilever type skew rolling mill. The skew rolling mill is mainly composed of a base, a cantilever type roller system, a gear synchronizing mechanism, a radial reduction mechanism, machine frames, a material guiding unit and inclination angle adjusting mechanisms, wherein the cantilever type roller system is tensioned by bolts on the backs of the machine frames of the rolling mill, and the roller system inclination angle adjustment is realized through the inclination angle adjusting mechanism below bearing seats; the two machine frames which are supported by double rotating shafts of the rolling mill base; synchronous alignment and reduction are realized on the two machine frames through the gear synchronizing mechanism, and the center line of the vertical direction of the rolling mill is ensured to be fixed; the radial reduction mechanism is arranged above the machine frames, and the roller distance adjustment of two rollers is realized by rotating reduction nuts; and the inclination angle adjusting mechanisms are arranged at the corners of the machine frames so that the space can be saved, moreover, the action line is long, and the high-precision adjustment of the inclination angle of the roller system can be realized. The double-rotating-shaftcantilever type skew rolling mill is ingenious in design, has the advantages of convenience in roller replacement, fixation of the vertical center line of the rolling mill, convenience in installationand adjustment and the like, and is suitable for the production of large-scale small-diameter steel balls.

A roll changing carriage can be displaced transversely with respect to the strip rolling stand and a removal crossbar is provided for the removal of the set of backup rolls. In order to shorten the roll changing times and to automate the changing of the rolls, the removal crossbar can be positioned on the roll changing carriage and is provided with wheels on which the removal crossbar can be moved out of the roll changing carriage on guide rails running parallel to the rolls into the strip rolling stand on the intermediate roll rails, and can be pulled out of the strip rolling stand together with the set of backup rolls.

The invention discloses an automatic unhooking and hooking device for roll change of a horizontal mill. The automatic unhooking and hooking device comprises a roll change carriage, a carriage hook head, a positioning oscillating bar and a roll hook head, wherein the roll hook head is arranged on one end of a roll of the mill, one end of the carriage hook head is hinged with the front end of the roll change carriage, the other end of the carriage hook head is bent downwards and is provided with a carriage hook head part with a downward opening, a limiting mechanism which is used for limiting the carriage hook head part to rotate downwards to be lower than a horizontal plane is arranged between one end of the carriage hook head and the roll change carriage, the upper end of the positioning oscillating bar is hinged with the middle of one end, which is bent downwards, of the carriage hook head, a roll hook head part with an upward opening is arranged on the roll hook head, and a limitinginclined plane and a positioning groove are formed in the roll hook head part. According to the automatic unhooking and hooking device, the automatic hooking and unhooking can be realized, compared with a manual operating mode of the carriage hook head of an existing horizontal mill during roll change, the manual operation is reduced, human input is released, potential safety hazards are eliminated, and the roll change time is shortened. The invention further discloses an automatic unhooking and hooking method for roll change of the horizontal mill.

The invention relates to the technical field of composite plate rolling, in particular to a detachable roller special for composite plate rolling. The detachable roller comprises a core shaft, rollersleeve pieces, fastening screws, nuts and the like. The three or more completely-identical roller sleeve pieces are mounted outside the core shaft, and the roller sleeve pieces can be independently demounted. The roller sleeve pieces are divided into flat roller sleeve pieces and corrugated roller sleeve pieces, and the corrugated cross section on each corrugated roller sleeve piece is designed into a sine function curve or other function curves. The positions of the roller sleeve pieces can be aligned in the axial direction of the roller so as to meet mounting of the roller sleeve pieces of different widths. The connected parts of the corrugated roller sleeve pieces are trough positions, and the influence of the connecting parts on the rolling surface of a composite plate is reduced. Thedetachable roller is simple in mounting during use, the roller replacement time is saved, the rolling pass is reduced, and the production efficiency of composite plate rolling is improved.

The invention provides a vertical double-position wiping machine, aiming at overcoming the defects that the roller replacing time is long, the roller is easy to scratch and the wiping effect of a horizontal wiping machine is poor. The invention adopts the technical scheme that the wiping machine comprises a rack (1), the rack (1) is provided with a pair of upper wiping rollers and a pair of lower wiping rollers, the upper wiping roller is composed of an upper swing roller (2) and an upper fixed roller (4), the lower wiping roller is composed of a lower swing roller (6) and the lower fixed roller (7), one pair of wiping rollers or two pairs of wiping rollers are caused to operate according to the technological need of a production line to the wiping effect, thus a satisfied wiping effect is achieved and the application is flexible; when the rollers are abraded, one pair of the rollers operate while the other pair of the rollers are replaced, thus one pair of the rollers operate and the pair of the rollers are spare; and the strike direction of plate and strip is not contacted with the surface of the wiping rollers while the wiping rollers are not in operation, thus the plate and strip can not be scratched when the rollers are replaced and the problem that the plate and strip are easy to scratch is effectively solved.

The invention relates to a method for solving wave shapes among racks through proportional convexity variation coefficients. The method comprises the following steps of determining the ratio convexityvariation coefficient of each rack, determining the target convexity of a product, configuring the convexity of a middle blank, calculating the convexity value of each rack and the like. According tothe method for solving the wave shapes among the racks through the ratio convexity variation coefficients, it can be guaranteed that the head convexity of strip steel reaches the target value completely, that is to say, it is guaranteed that the outlet convexity of each rack is within the equipment capability range, and the precondition is established for the purpose of enabling the full-length convexity to reach the target value. In addition, it can be guaranteed that no wave shape exists among the racks and at an outlet of a finish-rolling group, especially the flatness of the strip steel between the finish-rolling rear-section racks such as F5, F6 racks and F6, F7 racks. Thus, the strip-threading stability in the thin-specification strip steel rolling process is guaranteed, the rollingplan is finally prolonged by at least 15% or above, the roll changing time is reduced, and the roller consumption is reduced.

Disclosed is a metal welded pipe forming device with a common roller and a production method thereof. The metal welded pipe forming device comprises a first small roller set, a second small roller setand a third small roller set. A pipe blank is conveyed by a clamping-conveying roller, a belt-drive fine-forming roller and a sizing roller in a metal welded pipe production line. Combined roller bending technology is adopted, a set of small rollers are used for replacing a set of existing large-diameter horizontal rollers and vertical rollers at the rough-forming stage, vertical rollers are notneeded, when specifications of welded pipes are changed, only the positions of the small rollers need to be adjusted, thus equipment investment is lowered substantially, and production efficiency is improved greatly.

The invention discloses a machining device for improving the roller surface clearness and a machining method thereof. The machining device is connected to a machine body of a grinding machine, and comprises a shell body, a compression mechanism, a hydraulic mechanism and a surface treatment mechanism; the hydraulic mechanism is arranged above the shell body, the shell body is connected to the machine body of the grinding machine through the hydraulic mechanism, and one end of the surface treatment mechanism is connected to one side edge of the shell body through the compression mechanism and is arranged below the shell body; and the surface treatment mechanism comprises a steel plate and abrasive paper, the upper surface of the steel plate is in contact with the shell body, the abrasive paper is connected to the lower surface of the steel plate, the abrasive paper and the steel plate form a whole, and the lower surface of the abrasive paper is used for machining the roller surface clearness. By means of the machining device and the machining method, generation of powder in the roller rolling process can be reduced, strip steel surface spot defect generation caused by reduction of the roller surface clearness is reduced, meanwhile, the roller roughness attenuation is reduced, and the roller abrasive resistance is improved.