462results about "Rolling safety devices" patented technology

A four-row cylindrical roller bearing is incorporated into between the inner peripheral surface of a housing and the outer peripheral surface of a backup roller. A sensor unit 7 is held in a portion of a collar disposed in the axial-direction end portion of the four-row cylindrical roller bearing. The sensor unit comprises a detect part for detecting temperatures and vibrations and a transmitter device for transmitting signals, which are obtained after output signals taken out from the detect part are processed, as radio signals. On a portion of a hold cover which is a separate member from the collar, there is disposed a receive antenna which is part of a receiver apparatus for receiving the radio signals transmitted by the transmitter device.

The invention relates to a light metal-based composite material and a preparation method thereof, comprising a layered light metal and graphene nanosheets distributed in the layered metal, the light metal-based composite material comprising at least two heterogeneous light metal substrate metal layers and At least one composite layer is alternately arranged, and the composite layer is located between two layers of heterogeneous light metal substrate metal layers; the light metal-based composite material is cold rolled, or warm rolled, or hot rolled, or electroplastically rolled, or It is prepared by the method of warm rolling + electroplastic rolling. The light metal base layer composite material prepared by the method of the invention has higher strength and toughness, and can realize large-scale production of layered composite boards, with simple process and relatively low cost.

A four-row tapered roller bearing is incorporated in the clearance between the inner surface of a housing and the outer surface of a rolling roller. A pair of supporting members supporting sensor devices are fitted in and supported by a part of the inner surface of the housing in such a manner that they are opposed to the ends of outer rings of the four-row tapered roller bearing disposed close to the both axial ends thereof. The sensor devices each comprise a distortion gauge as a detecting portion and a first coil for transmitting as a wireless signal a signal obtained by processing an output signal outputted from the distortion gauge. A second coil for receiving the wireless signal transmitted by the first coil is retained on a part of a member other than the supporting members.

Provided is a system for remote on-line monitoring and intelligent diagnosis of a high-speed wire rod mill. The system comprises a sensor network, a central node, an industrial control computer (on-site processor), and a monitoring and diagnosis center. The sensor network is a sub-network formed by data collection equipment in a mill train. Data collected by the data collection equipment is transmitted to the industrial control computer. The industrial control computer performs denoising and transformation processing while storing the data. The industrial control computer determines whether the high-speed wire rod mill has faults or not by the processed data, that is, performs pre-diagnosis, and outputs a result. If the result output by the industrial control computer determines the high-speed wire rod mill has faults, the data is transmitted to a monitoring and diagnosis center. Otherwise, the industrial control computer does not transmit the data to the monitoring and diagnosis center. After the monitoring and diagnosis center receives the data that the high-speed wire rod mill has faults, the monitoring and diagnosis center further analyzes the pre-diagnosis of the industrial control computer, and outputs a result. The system and the method can determine types of a current fault of a rolling mill and a fault position online in real time, and prolong service life of equipment.

The invention provides a method for identifying and monitoring the slippage of the engagement of a strip head into a frame during the finish rolling of a hot rolled strip. The method is implemented by a computer real-time monitoring system and includes determining the strip position by means of electrical tracking signals to make the strip head reach to a first finish rolling frame; determining the flying shear slippage; determining the slippage if the running speed of a pinch roll contacted with the strip is zero, and then stopping the strip; and determining based on the pinch roll speed change condition and continuous time: the strip normally runs if the running speed of the strip in the pinch roll is between an upper limit value and a lower limit value, slippage occurs if the strip running speed is lower than the normally set lower limit value, and the computer system performs alarm display when the slippage continuous time exceeds the tolerable threshold value. The computer system gives a determination on the slippage, calculates the slippage time in real time, outputs alarm information, automatically stops steel feeding when a condition is satisfied, and prevents the accident extension.

The invention discloses a hot rolling flat roller play control method which provides more specific roller play strategies for different tandem rolling plans. The play control method includes the steps of classifying all strip steels of a rolling plan into two categories, a wide plate and a narrow plate, based on a critical width; as to the narrow plate, calculating the roller play positions of all the strip steels in a recursion mode, and then extracting the roller play position of the narrow plate; as to the wide plate, determining a permitted variation range of each roller play position, building an objective function for evaluating the sectional shape of the strip steel based on the rolling plan, and then optimally calculating the roller play position of the wide plate by employing the genetic algorithm. The hot rolling flat roller play control method breaks through the conventional roller play mode by providing more specific roller play strategies for different tandem rolling plans. The strip steels are classified into the wide plate and the narrow plate, and the narrow plate is calculated in a recursion mode, while the wide plate is optimally calculated by the genetic algorithm. Thus, the hot rolling flat roller play control method plays an active role in improving the quality of the strip shape of the tandem rolling strip steel.

The invention discloses a steel pilling-up protective method for a serial type rolling mill, belongs to the technical field of an automatic control method for a rolling mill and aims to provide the steel pilling-up protective method for the serial type rolling mill by which steel pilling-up in the rolling process of a rolled piece can be accurately judged in time, an alarm is given in time, and the rolling mill stops operating. According to the steel pilling-up protective method for the serial type rolling mill, hot metal detection elements are installed at a rolled piece inlet side and a rolled piece outlet side of each rack of the serial type rolling mill respectively and used for detecting whether the end of the rolled piece reaches the current position. When the system judges that the end of the rolled piece enters from the rolled piece inlet side and does not reach the rolled piece outlet side within a preset time, an alarming module is started. The steel pilling-up protective method for the serial type rolling mill is suitable for the serial type rolling mill to roll various rolled pieces, and especially suitable for steel pilling-up protection control over heavy steel rails and other rolled pieces prone to having a steel pilling-up phenomenon in the same class.

The invention provides a measuring device for mechanical-electrical-hydraulic coupling vertical vibration of a screw-down system of a rolling mill, and belongs to the technical field of fault detection of rolling mills. The measuring device is characterized in that real-time detection on mechanical-electrical-hydraulic coupling vertical vibration is realized, signals are collected from mechanics, electrics and hydraulic pressure, and the mechanical-electric-hydraulic coupling vertical vibration of the rolling mill can be detected and warned in an online manner by processing and analyzing the signals. When the rolling mill is in a mechanical-electrical-hydraulic coupling vertical vibration state, the measuring device can give an alarm in time and reminds operators of taking necessary treatment measures, and safe running of the rolling mill is guaranteed. The measuring device has a quite high economic benefit and high application value for enterprises.

The invention belongs to the technical field of steel band cold rolling, and discloses a production technology of a high-elongation cold-rolled ribbed bar. The production technology comprises the feeding procedure, the bar processing procedure and the product collection procedure, wherein the bar processing procedure comprises the following steps of first-pass rolling procedure: carrying out reducing flattening on the bar through a first-pass rolling machine; second-pass rolling procedure: carrying out rounding and reducing on the bar treated in the first-pass rolling procedure through a second-pass rolling machine, wherein the reducing ratio is 0.6 to 0.8; and thermal treatment procedure: carrying out tempering treatment on the bar treated in the second-pass rolling procedure, carrying out thermal treatment for 0.8 s to 2 s at the temperature of 580 DEG C to 650 DEG C, and naturally cooling the treated bar in air. According to the production technology, reducing is not carried out onthe bar in the first-pass rolling procedure, the bar is only flattened in the first-pass rolling procedure, and strength of the bar is improved through bar flattening.

A method for filtering out occluding steel impact data based on working condition signal triggering includes the following steps of firstly, selecting real-time working condition data of a productionline; secondly, configuring a judgment logic of working condition judgment parameters; thirdly, determining an occluding steel event of a rolling mill at the current moment; fourthly, collecting vibration data and temperature data; and fifthly, displaying date and a device state. The filtering-out method based on a working condition signal is better targeted at the actual operating conditions of adevice, the source of abnormal data is avoided from the root of collecting, and therefore the interference caused by the occluding steel impact data in the production process to early warning of thedevice is eliminated, misinformation is effectively reduced, and early warning is more precise. Meanwhile, by filtering out the abnormal data, the effective data capable of being used for diagnosis isscreened out in the diagnosis process of device failures, and a data basis is provided for subsequent diagnosis.

The invention discloses a method for preventing steel clamping of a single-machine-frame rolling mill. The method comprises the steps that firstly, a slab arrives at the front of a rolling mill entrance, the speed of the rolling mill is increased from the first speed V1 to the second speed V2; secondly, the head of the slab is bitten into the rolling mill; thirdly, the speed of the rolling mill isincreased from the second speed V2 to the third speed V3; fourthly, whether the actual current value of a motor in the rolling mill is larger than or equal to the current amplitude limiting C2 or notis judged, when the actual current value of the motor is larger than or equal to the current amplitude limiting C2, the speed reducing function of a basic automatic computer L1 is started, the basicautomation computer L1 is used for reducing the speed given value of the rolling mill, when the actual current value of the motor is lower than the current amplitude limiting value C2, reducing of thespeed given value is stopped until the tail of the slab is discharged out of the rolling mill, if the actual current value of the motor is still larger than or equal to the current amplitude limitingC2, the actual speed value of the rolling mill is reduced to the lowest speed amplitude limiting V1 until rolling is finished; and fifthly, when the actual current value of the motor is smaller thanthe current amplitude limiting C2, the tail of the slab arrives at the front of the rolling mill, the speed of the rolling mill is reduced from the third speed V3 to the second speed V2.

A multi-row rolling mill has in one housing at least two groups of rolls including at least one pair of work rolls, and constructed so that when the workpiece to be rolled is passed one time, it can be rolled using said respective work rolls. The multi-row rolling mill is characterized in that it is provided with a means for removing the workpiece if the workpiece stops moving between said roll groups.

A system and method for monitoring clinched joints senses lateral displacement of die segments during formation of a joint, which depends on joint button diameter. The system determines whether a joint is acceptable by correlating acceptable button diameter with acceptable amount of punch advancement. A predetermined number of unacceptable joints indicates excessive punch and/or die wear.

The invention discloses a roll breakage protecting control method for a working roll of a heavy and medium plate mill, which comprises the following steps: additionally arranging two pressure sensors at a driving side and an operating side on an AGC control hydraulic valve stand; transmitting detected signals of pressure intensities to a mill control PLC; obtaining the pressures of an AGC cylinder by respectively multiplying the pressure intensities detected by the two pressure sensors by the area of the AGC hydraulic cylinder by the PLC, wherein the pressures of the AGC cylinder are respectively the pressures acting on two sides of the working roll; comparing the calculated two pressures of the two sides of the working roll respectively with force detected by a piezomagnetic head; and when the comparison result is larger than 800T, considering that the working roll of the mill is abnormal currently, immediately stopping the current action, and opening a roll gap quickly to protect the working roll. The invention takes the detected deviation value of actual forces of an upper roll and a lower roll as a controlled object, limits the actions of the upper roll and the lower roll, avoids breakage of the working roll, and can effectively protect the working roll when the mill has abnormal conditions, thereby preventing the roll breakage.

The invention relates to self-excited vibration monitoring in the strip steel production process and discloses a sudden frequency tripling self-excited vibration alarm device for a sheet rolling mill. The sudden frequency tripling self-excited vibration alarm device comprises a vibration sensor and a speed sensor, wherein the vibration sensor is provided with a constant current source circuit which is sequentially connected with an electrostatic discharge (ESD) protection circuit and a highly dynamic range conditioning circuit and is connected with an isolating circuit through an anti-aliasing filtering circuit and an analog/digital (A/D) conversion circuit; a speed analog signal transmitted by the speed sensor sequentially passes through the ESD protection circuit, a radio frequency interference (RFI) filtering circuit and a speed signal conditioning circuit and is transmitted to the isolating circuit through the anti-aliasing filtering circuit and the A/D conversion circuit; a speed pulse signal of the speed sensor is input into the isolating circuit through the protection circuit and a shaping circuit; the output of the isolating circuit is connected with a microprocessor; and the microprocessor is connected with an upper computer which has calculation and audible and visual alarm functions by utilizing a remote fiber test system (RFTS) protocol. According to the device, the self-excited vibration and sudden strong resonance in the sheet steel rolling production process can be alarmed.

The invention discloses a vibration diagnosis method for abnormal roller torsional vibration fault of a cold-rolling mill roller. The method comprises the steps that a roller torsional vibration faultcharacteristic index set is constructed according to the correlation degree displayed by historical data; according to historical data, rolling mill roller parameters, working parameters and the like, a roller torsional vibration fault abnormal feature library is established; vibration data of upper and lower supporting rollers of a mill roller and rotating speed data of upper and lower working rollers of the mill roller are acquired in real time, and edge calculation processing is performed; according to sample data collected in real time, working condition learning is carried out, and feature library parameters are updated; a diagnosis task is generated according to the monitoring data and the rolling mill equipment, the monitoring data are subjected to real-time diagnosis processing, the diagnosis result is synchronously sent to an on-site rolling mill operator, and red-yellow early warning and sound alarm functions for abnormal fault information are provided; and diagnosis errorsare periodically checked, and a fault abnormal feature library and a diagnosis program are optimized. The vibration diagnosis method is low in cost, high in efficiency and accurate in diagnosis result, and does not need people to be attended.

A progressive stamping die system and method of operation providing dimensionally accurate flat stamped parts. A biasing mechanism is provided in actual alignment with a coin punch member in order to accurately control the configuration and planar accuracy of the stamped parts being formed.

The invention discloses a screw down cylinder deviation control method of a hot continuous rolling mill. The method comprises the steps of (1) judging whether the state of a rack of the hot continuous rolling mill, implementing the step (2a) if the rack is in the 'with steel' state, and implementing the step (2b) if the rack is in the 'without steel' state; (2a) performing dynamic deviation control, specifically, working out the variance of position deviation of a screw down cylinder, judging whether the variance is larger than the variance threshold value or not and whether theta is larger than alpha or not, if yes, locking the screw down cylinder, and if not, implementing rolling normally; and (2b) performing static deviation control, specifically, working out the position deviation s1 of the screw down cylinder on the working side, the position deviation s2 of the screw down cylinder on the transmission side, and the position deviation S of the portions, on the two sides of the rack, of the screw down cylinder, if S is larger than or equal to beta1, forbidding the rack from feeding steel, if S is smaller than beta1, allowing the rack to feed steel and implementing the next step, if at least one of s1 and s2 is larger than or equal to beta2, locking the screw down cylinder, and if s1 and s2 are both smaller than beta2, implementing rolling normally.

A composite rolling mill clad-rolling large-lag AGC (automatic gain control) method includes the steps: 1) calculating a sampling period according to current line speed and the distance between a thickness meter and a roll gap; 2) averaging sampled signals in a plurality of periods to obtain a final sampled value; 3) dividing the final sampled value into different intervals according to a current strip plastic curve and performing staged integral control for deviation between an actual value and a set value of a strip steel thickness according to the intervals; 4) enabling integral controllers in the intervals to generate continuous roll gap modification values by a thickness deviation integral controller using corresponding integral control parameters in the divided sampled value interval; 5) smoothing the roll gap modification values by the aid of a constant rate slope at an interval switching position, and switching roll gap set values with low interference. According to the method, metal strip finished product quality can be improved, rolling mill roll gap movement range is narrowed, and the service lives of a roll and a servo valve are prolonged.