7results about How to "Reduce roll consumption" patented technology

The invention discloses a multi-motor transmission straightener load distribution control method, which comprises the following steps of: correcting the speed of a rear motor on a straightener through a load balancer, and keeping the speed of the rear motor consistent with the speed of a front motor on the straightener; the load balancer takes the torque of the front motor as a reference value, the reference value is compared with an actual value of the torque of the rear motor, a speed correction value of the rear motor is obtained, and the speed correction value limits the speed of the rear motor in a speed window of the load balancer; and when the parameters of the front motor are the same as the parameters of the rear motor, the load distribution ratio of the load balancer is set to be 1. The problem of load distribution of straightening machine double-motor transmission is solved, and the speed stability of the straightening machine is guaranteed when abnormal conditions such as slipping occur.

The invention discloses a full roll surface immersion type cooling system for a hot rolling working roll, which comprises a working roll upper roll, a working roll lower roll, an upper water cutting plate and a lower water cutting plate, the upper water cutting plate and the lower water cutting plate correspond to the working roll upper roll and the working roll lower roll, and one side of the working roll upper roll is provided with an upper water collecting tank; an upper spraying system and an upper water collecting tank water cutting plate are arranged on the upper water collecting tank; an upper roll surface dynamic cooling water space is formed between the upper water collecting tank water cutting plate and the roll surface of the working roll upper roll; a lower water collecting tank is arranged on one side of the lower working roll, and a lower spraying system and a lower water collecting tank water cutting plate are arranged on the lower water collecting tank; and a lower roll surface dynamic cooling water space is formed between the water cutting plate of the lower water collecting tank and the roll surface of the lower roll of the working roll. According to the method, the purpose of the extreme use efficiency of the roller is achieved, the online loss of the working roller is reduced, the service life of the working roller is prolonged, the online use time is prolonged, and the roller replacement period is prolonged.

The invention provides a centrifugal bimetal composite graphite steel roll collar and a manufacturing method thereof.The centrifugal bimetal composite graphite steel roll collar comprises an outer ring and an inner ring, a plurality of spherical graphite points are evenly dispersed in the outer ring, the inner ring is arranged on the inner wall of the outer ring, and the outer ring and the inner ring are integrally formed in a composite casting mode. According to the centrifugal bimetal composite graphite steel roller ring, the multiple graphite points are arranged in the components of the outer ring, the outer ring is changed into graphite steel through the graphite points, the graphite points can restrain crack propagation generated by thermal fatigue in the rolling process of the steel roller ring, the single-time rolling steel passing amount of the steel roller ring is increased, few cracks are generated, the fatigue layer repairing amount of the rolled roller ring is reduced, and the service life of the roller ring is prolonged. Roll consumption can be reduced, and machining cost is saved.

The utility model relates to a hot-rolled slab oxide scale removing device which comprises an upper descaling device, a lower descaling device and side descaling devices, the side descaling devices comprise side descaling spray pipes oppositely arranged on the two sides of the lower descaling device, the side descaling spray pipes are communicated with a water inlet pipe of the lower descaling device, the side descaling spray pipes comprise a first side spray pipe and a second side spray pipe, and the first side spray pipe is communicated with the second side spray pipe. The first side spraying pipe and the second side spraying pipe are arranged in an angular symmetry mode, the first side spraying pipe is connected with a first side nozzle, the second side spraying pipe is connected with a second side nozzle, the end face of the first side nozzle and the end face of the second side nozzle are each provided with a spraying flat opening, and an included angle ranging from 30 degrees to 35 degrees is formed between the spraying flat opening of the first side nozzle and the horizontal direction. An included angle ranging from 15 degrees to 20 degrees is formed between a jet flat opening of the second side nozzle and the horizontal direction. The side descaling device further comprises a side jet pressure detecting device and a side jet pressure adjusting device. According to the utility model, the problem that the temperature drop of the corners is too large because the edge descaling water intensively strikes the corners of the plate blank can be avoided.

The application discloses a method for reducing the grinding amount of a supporting roller of a hot continuous rolling mill, and comprises the following steps: A, confirming the use condition of the supporting roller on the machine; B, checking and recording the roller surface of the supporting roller off the machine; C, grinding the supporting roller on a grinding machine, and detecting by using a grinding machine eddy current flaw detector; D, detecting the hardness of the roller surface after grinding; E, checking the roller body surface, and detecting by using coloring flaw detection if necessary; and F, performing ultrasonic flaw detection on the roller surface. The method solves the problems of crack expansion and peeling of the supporting roller on the machine due to the too small grinding amount of the supporting roller and the waste caused by the too large grinding amount, so that the grinding amount is optimized, and the cost of the rolling mill is reduced.

The invention relates to an HC series rolling mill intermediate roll reverse adjustment method, which comprises the following steps: 1) before dynamic specification change, according to the strip steel specification span before and after specification change, reducing the roll bending value of an intermediate roll and increasing the roll bending value of a working roll; (2) during dynamic specification changing, welding seams of strip steel of two specifications enter a roll gap, and a middle roll is subjected to UC-amp; automatic axial positioning is carried out according to the value, the middle roller has no convexity highest point, no obvious wave shape is generated in the whole axial positioning process of the middle roller, and only slight wave shapes caused by rolling force fluctuation after welding are generated; 3) finishing dynamic specification changing, and performing UC-amp; the value is reset, axial positioning of the middle roller is completed, the wave shape condition stably fluctuates within the range of 0-3I, and at the moment, the middle roller bending value and the working roller bending value are restored to preset values. The method has the advantages that double-side waves of the strip head during dynamic specification changing are effectively avoided, the strip shape quality is guaranteed, and the relative length difference is effectively reduced.

The invention provides a method for controlling roll consumption by using roll types of support rolls of a four-roll mill. The method comprises the following steps executed by a computer: collecting equipment, strips and rolling process parameters; determining iteration parameters of the calculation process; calculating a roll shape curve of the support roll through the roll shape parameters; dividing the length of a roller body and the width of a strip, and defining relevant parameters of a calculation process; calculating a load and deflection change influence function and a supporting force and deflection change influence function; calculating an inter-roller pressure value of each segment after segmentation; calculating an inter-roller pressure optimization function value; judging whether the roll shape is not the original roll shape or not and whether the optimization function value difference is smaller than a calculation error value or not; judging whether the height is not the initial shoulder cutting height and whether the difference value of the optimization function values is smaller than a calculation error value; outputting shoulder cutting height and shoulder cutting length results, and calculating the depth of the fatigue hardening layer of the roller. By optimizing the roller shape curve and calculating the depth of the fatigue hardening layer of the roller, the roller consumption of the supporting roller is reduced, and the economic benefit is improved.