536results about "Profile control device" patented technology

The invention relates to the technical field of metal processing and digital control, and discloses a digital control method and system for copper strip rolling production, and the method comprises the steps: obtaining a technological parameter sequence and a surface image in a rolling process in real time; analyzing the dynamic change trend of the process parameter sequence to obtain parameter fluctuation characteristics; if the parameter fluctuation characteristic exceeds a preset fluctuation threshold value, identifying a microscopic adhesion position of the copper strip surface image and determining a complete distribution map of an adhesion range; analyzing by combining defect features extracted from the complete distribution map and the process parameter sequence to obtain a parameter interaction weight; and based on the parameter interaction weight, generating optimized process parameter configuration and adjusting an equipment operation state. According to the method, the problem that the control precision of the dynamic defects on the surface of the copper strip is insufficient in the prior art is solved by establishing the dynamic correlation between the process parameters and the surface defects and performing data-driven closed-loop control.

The invention relates to the technical field of metal plate rolling processing, and discloses a rolling strengthening method capable of reducing the rigidity of a metal plate, which comprises the following steps: applying an asymmetric rolling condition to an initial plate to enable the plate to generate a speed gradient in the thickness direction; the plate is subjected to one-pass large-rolling-reduction rolling, and a non-continuously-distributed shear band is formed; the rolled plate is heated to the dynamic recrystallization temperature interval of the plate, and multi-pass small-rolling-reduction warm rolling is conducted on the plate; and in the warm rolling process, dynamic recrystallization of a shear band is promoted to form a grain-refined continuous core layer, complete recrystallization of the surface structure of the plate is inhibited to keep the work hardening state of the plate, and therefore the metal plate with the rigidity lower than that of an initial plate is obtained. According to the invention, a soft core-hard shell heterostructure is constructed in the plate, high strength and low macroscopic rigidity are synergistically realized, the process controllability is strong, and the method is suitable for preparation of high-performance structural materials.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

To provide a warpage measurement method of a metal plate for detecting warpage of a metal plate with high accuracy, and to provide a warpage measurement device, a program, a warpage control method for reducing the warpage of the metal plate, and a manufacturing method of the metal plate with reduced warpage.SOLUTION: A warpage measurement method of a metal plate includes: an imaging step of capturing an image including at least one of a leading end portion and a trailing end portion of the metal plate; an extraction step of detecting a side surface region corresponding to a side surface portion of the metal plate from the image and extracting a coordinate group representing a boundary position of the side surface region; and a specification step of specifying warpage of the metal plate based on the extracted coordinate group.SELECTED DRAWING: Figure 5

The invention relates to a hot continuous rolling strip steel plate shape control method and device and electronic equipment. The method comprises the steps that plate blank PDI data, equipment parameters and model parameters are read; calculating speed, temperature and thickness parameters of each finish rolling rack based on a finish rolling model; the roll bending force set value of each rack is calculated, and the roll bending force reference value, the convexity self-learning distribution value, the straightness self-learning distribution value and the operator intervention value of the SAMP model table are superposed in response to the situation that the rolling specification is not replaced, so that the roll bending force set value is generated; in response to replacement of steel types, thickness or width specifications, on the basis of superposition of non-replaced specifications, a roll bending force difference value of the SAPP model table and the SAMP model table is introduced to be multiplied by a dynamic adjustment coefficient, and a roll bending force set value is generated; a roll bending force set value is issued to an execution system at the finish rolling inlet moment; and the actual convexity and straightness of the finish rolling outlet strip steel are collected, target values are compared, and the set value of the next plate blank is corrected through self-learning. The method improves the target convexity and straightness hit rate of the hot-rolled strip steel.

The application discloses a kind of suitable for high manganese non-magnetic steel's regrinding rolling process, belong to technical field.The regrinding rolling process includes the following steps: (1) using the regrinding process of ladder transition, the upper surface edge defect of high manganese non-magnetic steel blank is regrinded treatment;(2) using the regrinding process of ladder transition symmetric with upper surface to the lower surface of blank regrinding treatment;(3) the blank after regrinding treatment of upper surface and lower surface is heated treatment;(4) using two-stage controlled rolling process.The regrinding rolling process used in the application is regrinded by ladder transition in the place where blank edge has defect, without regrinding the entire lower surface, after using this regrinding method, the regrinding amount of blank is reduced, and the regrinding efficiency is improved, and the blank yield is improved.The application uses economic TMCP process, and the process is simple, the production cycle is short, and the production cost is low.

The invention discloses a control method and device for improving black marks on the surface of a thick plate in the technical field of controlled rolling and controlled cooling. The method comprises the steps that a pretreated plate blank is obtained; the pretreated plate blank is heated according to a preset heating system, and a heated plate blank is obtained; the heated plate blank is input into a descaling box to be descaled, and a plate blank subjected to primary descaling is obtained; the plate blank subjected to primary descaling is firstly input into a roughing mill to be subjected to cogging broadening and then input into a finishing mill to be subjected to thickness rolling treatment, and a semi-finished steel plate is obtained; and straightening and cooling the semi-finished steel plate to obtain a finished steel plate. The technical problem that in the prior art, due to existing controlled rolling and controlled cooling processes, black marks appear on the surface of the steel plate, and consequently the production cost is increased can be solved.

The invention discloses a roller grinding management method based on the surface quality of a copper plate strip, and aims to solve the problems that existing roller grinding depends on experience, positioning is inaccurate, and grinding is excessive or insufficient. The method comprises the following steps: collecting waveform data of copper print defects and flatness on the surface of a copper plate strip, and performing timestamp synchronous calibration with a rolling speed and a coil length counting signal of a rolling mill; constructing a roller damage reverse diagnosis mechanism, calculating a damage angle in combination with a copper printing coordinate, identifying a damage type, and calculating a wear depth; differentiated grinding work orders are generated according to different damage types, and high-precision positioning grinding is executed; and after returning to the production line, carrying out on-line real-time monitoring and off-line sample rechecking on the original damaged position, dynamically adjusting parameters and judging the grinding fit state. Precision, differentiation and closed-loop management of roller grinding are achieved, the grinding efficiency is effectively improved, the service life of the roller is effectively prolonged, the surface quality of a copper plate strip is remarkably improved, and the defect rate is reduced.

The present invention relates to a method (100) and a device (10) for determining a target value (S) for a selected production parameter (P) of a rolling mill (200) with at least one rolling stand group (230) for rolling a metal product (12) into a metal strip (14), as well as a rolling mill (200) with such a device (10), a computer program product, and a machine-learned model (40). A value (W) of a material parameter (M) for a predetermined reference material is provided (S1). A correction factor (c2) for the material parameter (M) is determined by a machine-learned model (40) based on a recurrent neural network (42) using previously known production parameters (P*) in the metal strip production process (S3).The target value (S) for the production parameter (P) of the rolling mill (200) can then be determined on the basis of a physical production parameter model (52) which incorporates the material parameter value (W) adjusted with the correction factor (c2) and target specifications (Z) for the rolling of the metal strip (14) (S4).

The invention discloses a single-line laser medium plate surface flatness measuring method and system, and belongs to the field of metallurgical equipment intellectualization, and the method comprises the steps: obtaining a laser line image of a to-be-measured medium plate, the laser line image being an image obtained by carrying out laser line projection on the medium plate through line lasers in the longitudinal direction and the transverse direction; collecting a cross point of the projected laser rays in two sequentially adjacent laser ray images, and correcting according to the cross point of the projected laser rays; performing image preprocessing on the laser line image, performing laser contour line extraction on the preprocessed laser line image, and obtaining an area surrounded by the extracted laser contour line; according to the area surrounded by the extracted laser contour line and the standard area, the surface straightness of the medium-thickness plate is obtained through calculation; the calculation precision and stability of the straightness of the medium-thickness plate are improved.

The invention discloses equipment and a method for customizing front and back morphology structures of an invar alloy ultra-thin strip, and belongs to the field of invar alloy ultra-thin strip processing. The equipment comprises a working roller with differentiated surface topography, a first middle roller with a polyurethane-based organic material coating layer, an ultrasonic clamping device, an integrated tension weighting control system and a central control unit. By configuring different surface roughness of the upper working roll and the lower working roll and combining stable transverse pressure stress and axial ultrasonic vibration provided by the first middle roll, asymmetric plastic flow and shape copying of metal on the front face and the back face of the strip are achieved. In the rolling process, plate shape defects caused by friction differences are dynamically compensated by cooperatively adjusting the roll shifting amount of the first intermediate roll and the convexity of the backing roll saddle, finally, customized production of the 4J36 invar alloy ultra-thin strip with the thickness of 15 microns is achieved, the A face and the B face of the strip have different surface roughness, and the surface roughness of the strip is greatly improved. And the specific requirement of a fine metal mask plate pore-forming process on the surface state of the base material is met.

The invention discloses a machining device and method for metal belt production, and relates to the technical field of metal belt machining, the machining device comprises an uncoiler, a cutting machine is arranged on one side of the uncoiler, and a pickling machine is arranged on one side of the cutting machine; a cold rolling mill is arranged on one side, far away from the cutting machine, of the pickling machine; the cold-rolling mill comprises a cold-rolling rack, and an upper cold-rolling roller assembly is installed in the cold-rolling rack in a matched mode. Lower cold roller assemblies are symmetrically arranged below the upper cold roller assembly. The bottom of the lower cold roller assembly is installed on an inverted trapezoidal table, and the inverted trapezoidal table is arranged on the adjusting mechanism and connected with the guide frames on the two sides in a matched mode. Compared with a traditional mode that only the middle roller moves upwards for adjustment, more adjustment freedom degrees are provided; the multi-dimensional adjusting mode can better meet the rolling requirements of steel plates of different materials and different specifications, and the plate shape and thickness precision of the metal belt can be effectively improved by reasonably adjusting the rolling force in the vertical direction and the rolling force in the horizontal direction.

The invention relates to the technical field of steel rolling production quality detection, in particular to a steel rail bending and torsion online monitoring control method based on a thermal-state 3D full-section contour scanner, which is applied to a finish rolling mill and comprises the following steps: acquiring data of a steel rail, including a bending angle, a torsion angle and temperature data; formulating a corresponding control strategy according to the data of the steel rail; dynamically optimizing a control strategy through a PID (Proportion Integration Differentiation) control algorithm in combination with the monitoring data and the state of the finish rolling mill; and a mapping relation between steel rail deformation and parameters is established, an anti-overregulation mechanism is set, and online monitoring and control of steel rail bending torsion are achieved. Three-dimensional point cloud and temperature data of a plurality of sheet layers of the steel rail are obtained in real time, bending and torsion parameters are calculated through an intelligent algorithm and then transmitted to a finish rolling mill control system in real time through the industrial Ethernet, parameters such as roller pressure and roller gaps are automatically adjusted based on a preset control model, a real-time closed loop of detection-calculation-adjustment is formed, and the real-time control of the steel rail is achieved. And ensuring that the steel rail geometric shape meets the standard in the tapping stage.

The invention provides a plate shape control and plate thickness precision collaborative optimization method in the rolling process of a cold-rolling mill, which relates to the technical field of cold-rolling mill control, and comprises the following steps: acquiring contact parameters between a rolling working roll and a supporting roll, determining a contact stress distribution state, and acquiring the bending deformation of the working roll; constructing a coupling mapping relation between plate shape moment distribution and stress distribution; a compensation coefficient is adaptively adjusted according to the rolling state, and a dynamic collaborative optimization objective function is established; and working roll bending force and supporting roll displacement meeting the target are obtained through calculation, and rolling parameters are adjusted in real time. According to the method, cooperative control over the plate shape and the plate thickness is achieved, and the quality of cold-rolled products is improved.

This invention discloses a wedge control method for finishing mills based on hot-rolled production data, belonging to the field of steel rolling automation technology. The method includes: determining whether the roughing mill exit shape of the current strip is the same as that of the previous strip; when the F7 exit multifunction meter does not detect strip, calculating a first roll gap adjustment amount based on the above determination result using the difference in rolling force between stands or according to the genetic relationship between strip shapes; when the F7 exit multifunction meter detects strip, calculating a second roll gap adjustment amount based on the wedge detected by the F7 exit multifunction meter; and weightedly combining the first and second roll gap adjustment amounts to obtain the final roll gap adjustment amount. This invention combines operator experience with a mechanistic model to establish a scientific and accurate wedge control model, which can effectively reduce operator intervention and improve the stability of the rolling process and the accuracy of wedge control.

The invention provides a method for improving the section profile of a cold rolling raw material, which comprises the optimization of a convexity target value of a finishing mill group, a CVC roll shifting amount and a rack roll bending force parameter, and specifically comprises the following steps: if a wave shape and / or a high point appears in the middle of strip steel, reducing the convexity target value; if the edge of the strip steel is warped and / or warped in a cat ear shape, the convexity target value is increased; if waves and / or high points appear in the middle of the strip steel, the CVC roll shifting amount is reduced; if the edge of the strip steel is warped and / or warped in a cat ear shape, the CVC roll shifting amount is increased; after the strip shape is straightened, the roll bending force of a floating rack in the finishing mill group is adjusted, and if a wave shape and / or a high point appears in the middle of the strip steel, the roll bending force is reduced; if the edge of the strip steel is warped and / or warped in a cat ear shape, the roll bending force is improved; and the roll gap deviation or the roll bending force of the midstream frame is adjusted according to the actual strip shape of the strip steel. Adjustment of the plate shape and the section wheel is considered, and control over the effective section contour of the strip steel is guaranteed.

The present application relates to the technical field of steel plate production, and particularly relates to a production method of an extremely thin Nb-containing 355MPa-grade pickling plate, which comprises the following steps: 1) slab blanking: the difference between the slab width and the target width is controlled to be within 50mm, and the slab single weight is controlled according to the single steel rolling distance within 1150m; 2) heating: the air-fuel ratio of the heating furnace is set to be 1.8-2.0, the furnace atmosphere is controlled to be weak oxidizing, the furnace outlet temperature is 1220-1240 DEG C, the second heating section + soaking time is greater than or equal to 65min, the total in-furnace time is greater than or equal to 170min, and the interval between the steel tapping is greater than or equal to 160s; 3) rough rolling: the slab outlet does not use the SP width press, the rough rolling adopts two rolling mills, and each rolling mill is rolled for three passes; the descaling water is fed in each pass; 4) finish rolling: the finish rolling inlet temperature is controlled to be 1050-1080 DEG C, and the finish rolling temperature is within the range of 860-900 DEG C; 5) when the flatness defect occurs during the coiling, the cooling setting time is increased in the coiling drum. The present application guarantees the stable rolling and improves the surface quality of the steel plate.

Spiral forming methods can be used to join edges of a rolled material along a spiral joint to form conical and / or cylindrical structures. Alignment of the edges of the rolled material can be controlled in a wrapping direction as the material is being joined along the spiral joint to form the structure. By controlling alignment of the edges of the material as the edges of the material are being joined, small corrections can be made over the course of forming the structure facilitating control over geometric tolerances of the resulting spiral formed structure.

The invention discloses a method for improving the same-plate difference of non-oriented silicon steel through multi-process coordinated regulation and control. The method comprises the following steps: cooperatively controlling the following key process parameters: 1) hot continuous rolling process control: plate shape target control; width control; configuring and grinding a roller; a roller changing period; (2) five-rack acid continuous rolling procedure control: roller configuration; grinding the roller; and roll bending force control is conducted, specifically, the roll bending force of working rolls of all the racks is set to be 320 + / -20 kN for the rack S1, 330 + / -20 kN for the rack S2, 330 + / -20 kN for the rack S3, 330 + / -20 kN for the rack S4 and 330 + / -20 kN for the rack S5, an automatic mode is adopted, and dynamic adjustment is conducted according to feedback of a real-time strip shape instrument. According to the method, key process parameters in the whole hot rolling and cold rolling process are accurately controlled, the synergistic effect is formed, the transverse thickness uniformity of the strip steel is fundamentally improved, and therefore the high-quality non-oriented silicon steel product with the extremely small same-plate difference is obtained.

To provide a shape measuring method of a plate-like object, a rolling method of the plate-like object, a manufacturing method of the plate-like object, a shape measuring device of the plate-like object, and a manufacturing facility of the plate-like object capable of easily measuring a shape of the whole width of the plate-like object during hot rolling or immediately after the hot rolling by using a simple device.SOLUTION: In the shape measurement method for a plate-shaped object, the inclination angle is estimated from the luminance distribution of the heat radiation light emitted from the surface of the plate-shaped object based on the relationship between the inclination angle of the surface of the plate-shaped object obtained from the image of the side surface of the plate-shaped object and the luminance distribution obtained from the image of the heat radiation light emitted from the surface of the plate-shaped object including the side surface, which are obtained in advance.SELECTED DRAWING: Figure 1

Control system for cold rolling mills to improve sheet metal thickness uniformity. Sensors monitor the state of the cold rolling mill by measuring (i) roll eccentricity, (ii) roll slips during mill operation, (iii) mill disturbances from roll speed or roll force manifestations, and (iv) unknown disturbances referred to as process noise. The controller analyzes data from sensors to compensate. Data collected during the mill operation by the sensors are delayed in reaching the controller. This communication delay is accounted for by using a filter. Since an objective of the controller software is dynamic identification of eccentricity of the back up rolls, which is non-linear by nature, an Extended Kalman Filter may be used.

The application relates to a battery foil and a preparation method thereof, a battery and a power utilization device. The preparation method of the battery foil comprises the following steps: rough rolling treatment, medium rolling treatment and fine rolling treatment of a battery foil blank by using rolling oil in sequence; the rolling oil comprises base oil and rolling additives, the oil film strength alpha of the rolling oil is greater than 280 N, and the friction coefficient mu of the oil film is less than 0.05; the temperature of the rough rolling treatment is T1, the temperature of the medium rolling treatment is T2, and the temperature of the fine rolling treatment is T3, T1 < T2 < T3; the processing rate of the rough rolling treatment is S1, the processing rate of the medium rolling treatment is S2, and the processing rate of the fine rolling treatment is S3, S1 > S2 > S3; the rolling speed of the rough rolling treatment is V1, the rolling speed of the medium rolling treatment is V2, and the rolling speed of the fine rolling treatment is V3, V1 > V2 > V3. The preparation method of the battery foil can effectively improve the adhesion of the battery foil.

The utility model relates to the field of plate processing, in particular to an electromagnetic heating device for plate shape regulation and control and a control system.The electromagnetic heating device comprises a rolling mill assembly, a driving assembly is arranged at one end of the rolling mill assembly, a heating assembly is fixedly installed on one side of the rolling mill assembly, and a temperature measuring assembly is fixedly installed at the other end of the rolling mill assembly; the heating assembly comprises a first mounting frame, one end of the first mounting frame is fixedly connected with the machine frame, a heating plate is fixedly mounted in the end, facing the machine frame, of the first mounting frame, a plurality of mounting grooves are formed in the top of the heating plate and arranged in a rectangular array, and shielding cylinders are fixedly mounted in the mounting grooves. And a heating coil is fixedly installed in the shielding cylinder, a cover plate is fixedly installed at the top of the shielding cylinder and made of copper, a heat preservation cover is fixedly installed at the top of the heating plate, and the effects that the temperature of the plate is kept uniform during rolling, and the machining quality of the plate is improved are achieved.

The present application belongs to the field of cold-rolled strip steel, and particularly relates to a method for dynamically setting bending roll force in a cold-rolled strip passing process, which comprises the number N of racks, upper and lower limits of the bending roll force of the i-th rack, dividing the strip passing process into n sections according to time, collecting the strip passing speed v of the i-th rack in the j-th section ij , dividing the bending roll force of each rack into m sections according to an adjustable area, collecting the shape value L calculated by a virtual shape meter on site ijk , calculating a shape evaluation function and a shape target function, setting an optimal bending roll force value S i0 , collecting the shape distribution value l calculated by the virtual shape meter on site ijk , calculating a shape evaluation function and a shape target function, setting an optimal bending roll force value S 0ij , establishing a function corresponding to the optimal bending roll force S 0ij and the strip passing speed v ij , and solving function coefficients a i1 , a i2 . The method for dynamically setting the bending roll force in the cold-rolled strip passing process can accurately control the dynamic setting of the bending roll force of the cold-rolled strip steel in the strip passing process, improve the strip passing shape, and reduce the rolling fluctuation caused by the shape defects.

The invention relates to a plate shape control method in the rolling process of steel 30MnB5 for hot stamping forming. The plate shape control method in the rolling process comprises the working procedures of plate blank heating, rolling, cooling and coiling. In the cooling process, laminar cooling is used for cooling the strip steel to the coiling temperature, the cooling process is set as follows: cooling is performed in a sparse cooling mode, the cooling speed of the front section of laminar cooling is controlled to be 20-30 DEG C / S, the cooling speed of the rear section of laminar cooling is controlled to be 30-40 DEG C / S, and the total water amount of laminar cooling water spraying is set according to the ratio of the water amount of the front section to the water amount of the rear section of 1: 1.2-1: 1.4. The method is easy to implement, and the good strip shape control quality of the steel strip can be obtained through reasonable process design. And additional equipment and investment are not needed. By means of the method, the strip shape of the 30 MnB5 steel strip of the hot stamping forming steel of 5-10 mm is well controlled, the unevenness of the strip steel is not larger than 10 mm / m after the strip steel is flattened, and the wave shape judgment reduction amount and strip shape objection complaints caused by the poor strip shape are completely eradicated.

A system for processing a rectangular material from a coil is provided. The system may include an unwinding unit configured to unwind a rectangular material from a coil wound on a bobbin, a flattening device configured to flatten the unwound rectangular material, a shaping device configured to transform the flattened rectangular material into a shaped hairpin configuration; a reader configured to recognize, based on scanning an identification code of the bobbin mounted on the unwinding unit, batch information, and a controller configured to store, based on the batch information, a reference graph of a pressing amount for each batch of the bobbin set through a test; calculate, based on the stored reference graph and a change in physical properties of a rectangular material, a pressing amount for a rectangular material; and selectively control, based on the calculated pressing amount, a pressing amount of an individual flattening roller of flattening rollers.

The invention belongs to the field of metallurgical rolling automation control, and discloses a hot continuous rolling-cold continuous rolling full-process silicon steel same-plate difference plate shape control method which comprises the specific steps that a mathematical formula used for obtaining hot-rolled silicon steel section contour parameters is established; constructing a hot continuous rolling-cold continuous rolling whole-process complete data set; constructing a silicon steel same plate difference prediction model of the hot continuous rolling-cold continuous rolling whole process; training the established cold rolling outlet same plate difference prediction model by using the sample data set; according to a prediction result of the cold rolling outlet same plate difference prediction model, comparing with a target plate shape, and dynamically adjusting hot rolling outlet section parameters and cold rolling rack process parameters, the method is suitable for the production process of high-end plate strips such as high-precision silicon steel, fusion control of upstream and downstream rolling procedures of a hot continuous rolling-cold continuous rolling whole process is achieved, and the production efficiency is improved. And the high-precision same-plate difference plate shape control quality of the cold-rolled silicon steel is guaranteed, and good industrial application prospects and popularization values are achieved.

The invention discloses a special-shaped copper strip finish rolling forming device, and relates to the technical field of copper strip production and processing. A special-shaped copper strip finish rolling forming device comprises a main body mechanism which comprises an input bin and an output bin. A finish rolling assembly is arranged between the input bin and the output bin; the finish rolling assembly is composed of four forming assemblies. The forming assembly comprises a shaping mechanism, the shaping mechanism comprises two bottoms, and a first bottom roller assembly is installed between the two bottoms; the upper surface of the bottom is fixedly connected with rail frames, and a molding assembly is installed between the two rail frames. Pressing mechanisms are arranged on the two sides of the shaping mechanism correspondingly, each pressing mechanism comprises two base plates, and a second bottom roller assembly is installed between the two base plates; second rail grooves are formed in the upper portion of the base plate in a penetrating mode, and a pressing assembly is arranged between the two second rail grooves. And the total deformation of the anisotropic copper strip is decomposed into four gradients, so that the stress concentration problem is remarkably reduced, and the forming stability is improved.

The invention discloses a titanium microalloying high-purity 50 # cold-rolled steel strip special for a precision measuring tape rack and a preparation technology of the titanium microalloying high-purity 50 # cold-rolled steel strip, and belongs to the technical field of metal pressure machining and special steel strip preparation. Through converter-LF-RH triple smelting and calcium treatment, the inclusion content is reduced, and the fatigue life is prolonged by about 67%; the precise control of the thickness tolerance of + / -0.01 mm is realized by adopting a six-roller CVC rolling mill and laser thickness measurement closed-loop control, and the problem of wire jumping is solved; through optimized gradient heat treatment, the hardness fluctuation is smaller than or equal to 5 HB, the tensile strength fluctuation is smaller than or equal to 10 MPa, and the performance uniformity is guaranteed; the friction coefficient of the tooth surface is reduced to 0.20-0.25 from 0.35-0.40 through the zinc-manganese phosphating film, so that the meshing reliability is effectively improved; the whole process is optimized, so that the cold rolling pass is reduced, the annealing time is shortened, the comprehensive cost is reduced by about 25%, and the unification of high quality and high benefit is realized.

The invention relates to a scraping device (100) for applying a coolant onto the surface of a working roll in a roll stand (200) and for partitioning the material being rolled by means of the working roll from the coolant flowing from the working roll. The scraping device (100) has a scraper tip (110) and a main part (120) as a support for the scraper tip. The main part is equipped with a cooling channel (120) which is designed to supply a coolant to a slot nozzle which is formed on the scraper tip (110). In order to prevent the geometry of the outlet opening of the slot nozzle from changing in an undesired manner when the scraping device (100) is engaged against the surface of a working roll (210), the upper and lower flow guide surfaces of the slot nozzle (140) are designed to run preferably parallel to each other in the depth direction (y) at least over a specified wear length.