13results about How to "Improve rolling precision" patented technology

The invention provides metal rolling equipment capable of adjusting the rolling thickness, and relates to the technical field of metal plate rolling. A rectangular plate is fixed to the upper end of the bottom frame, two supports are installed on the rectangular plate through bolts, two fixing bases are fixed to the two supports respectively, adjusting bolts are screwed to the fixing bases in a threaded mode, and a partition plate is installed at the upper ends of the four adjusting bolts. The spring on the vertical rod can upwards extrude the bottom roller, the spring and the top roller jointly apply rolling force to a metal plate, the position of the partition plate can be accurately adjusted by rotating the four sets of adjusting bolts, then the distance between the bottom roller and the top roller is adjusted, and accurate control over the rolling thickness is achieved; the height of the adjusting roller can be finely adjusted by controlling stretching and retracting of the first hydraulic rod, the right side of the metal plate can be effectively prevented from being pressed downwards through the adjusting roller, it is guaranteed that the metal plate is kept in a balanced state in the whole rolling process, and therefore warping or inclination caused by uneven stress is avoided.

The invention relates to metal plate rolling equipment which comprises a left fixed roller and a right fixed roller which are symmetrically arranged, a multi-layer rolling structure is adopted, through the synergistic effect of the left fixed roller, the right fixed roller and a middle adjusting roller and in combination with an upper left roller, a lower left roller, an upper right roller and a lower right roller which are arranged up and down, precise step-by-step rolling on a metal plate is achieved, and the rolling precision of the metal plate is improved. Through the dynamic pressure and curvature adjusting system, the pressure distribution and the contact state between the upper roller and the lower roller can be adjusted in real time according to the material, the thickness and the process requirements of a to-be-machined plate through the upper adjusting roller, the lower adjusting roller, the matched upper adjusting mechanism and the matched lower adjusting mechanism, and the problem of insufficient rolling caused by overpressure fracture or underpressure is effectively solved; the left detection heating mechanism and the right detection heating mechanism integrate an electromagnetic ultrasonic nondestructive testing technology and an induction heating technology, so that nondestructive testing of internal defects of a plate can be achieved in the rolling process, and local or overall efficient heating can be conducted according to needs.

The invention discloses a strip steel rolling method and related equipment, and relates to the technical field of metallurgy, the method comprises the following steps: before first-pass rolling, default gain parameters are input into a target single-stand rolling mill, and the target single-stand rolling mill is used for carrying out first-pass rolling on target strip steel; before rolling of the Nth pass, the current reduction rate of the target strip steel is obtained, and N is an integer larger than 1; model input parameters are substituted into the correction relation model, a current correction coefficient corresponding to rolling of the Nth pass is obtained, and the model input parameters comprise the current reduction rate; the corrected gain parameter is input into the target single-stand rolling mill, the target strip steel is subjected to Nth-pass rolling through the target single-stand rolling mill, and the corrected gain parameter is a gain parameter obtained through calculation according to the default gain parameter and the current correction coefficient. According to the method, the gain parameters are dynamically adjusted to adapt to the current states of the target strip steel in different rolling passes, and the rolling precision of the strip steel is improved.

The invention belongs to the technical field of metallurgical steel rolling, and particularly relates to a method for preventing loop fluctuation between saw back steel finishing mill racks, which comprises the following steps of: (1) determining different furnace staying time of a second heating section and a soaking section according to different Mo contents of various steel types of saw back steel, and increasing the furnace temperature of a high-temperature section as much as possible in a performance allowable range; the higher the Mo content is, the longer the furnace staying time is; (2) in order to effectively avoid precipitation of M7C3 short rod type alloy carbides in a finish rolling area, the target temperature of a rough rolling outlet and the target temperature of a finish rolling outlet of each steel grade are determined; and (3) according to the thickness of each steel type, determining the AGC compensation coefficient of each rack when each steel type has no loop fluctuation and the thickness precision completely meets the requirement. According to the method, the Mo content is distinguished, the furnace staying time and the target furnace temperature of the high-temperature section of the heating furnace are determined, the rough rolling outlet temperature and the finish rolling outlet temperature are determined again, the AGC compensation coefficient of each rack is adjusted and optimized, and the loop fluctuation problem occurring when the saw back steel is rolled on the finish rolling rack is essentially solved.

The invention discloses a multi-module combined plate-type cross wedge rolling die, relates to the technical field of cross wedge rolling, overcomes the defects that in the prior art, the inside and the outside of a machined corrugated shaft are stripped, and a roller type rolling machine is too large in size, and mainly adopts the technical scheme that the multi-module combined plate-type cross wedge rolling die is used for solving the problems. A forming space used for forming a corrugated shaft is formed between the two forming supporting assemblies. At least one of the two forming supporting assemblies is a first track assembly, a plurality of adjacent transverse rolling modules form a forming wedge, pre-extrusion stripes are further arranged on a plurality of track plates in front of the forming wedge, or the two forming supporting assemblies are a second track assembly and a third track assembly, the second track assembly is provided with pre-extrusion stripes, and the third track assembly is provided with pre-extrusion stripes. And the third track assembly is provided with a forming wedge consisting of a plurality of same adjacent transverse rolling modules, so that the corrugated shaft sequentially passes through the pre-extrusion stripes and the forming wedge during forming. The invention further discloses a rolling method for machining the corrugated shaft through the die.

The invention provides a pre-stress rolling mill and relates to the technical field of metallurgical equipment, the pre-stress rolling mill comprises a rack, a roller system, a rack pre-tightening mechanism and a hydraulic control system, the roller system is rotatably mounted on a housing through a bearing seat, and the rack pre-tightening mechanism comprises a pre-tightening hydraulic cylinder matched with the bearing seat in an aligned manner; the output end of the pre-tightening hydraulic cylinder vertically penetrates through the memorial archway and is in threaded connection with the bearing seat, and the pre-tightening hydraulic cylinder applies pre-tightening force in the vertical direction to the roller system. The hydraulic control system is provided with a hydraulic pipeline and a pressure adjusting switching valve, the hydraulic pipeline is connected with the pre-tightening hydraulic cylinder, the pressure adjusting switching valve is arranged on the hydraulic pipeline, the pressure adjusting switching valve is provided with a first working position and a second working position, when the pressure adjusting switching valve is located at the first working position, first pressure is provided for the pre-tightening hydraulic cylinder, and when the pressure adjusting switching valve is located at the second working position, second pressure is provided for the pre-tightening hydraulic cylinder. And providing second pressure for the pre-tightening hydraulic cylinder, wherein the second pressure is higher than the first pressure. The pre-stress rolling mill can keep proper pre-tightening force in a roll gap adjusting stage and a rolling stage.

The invention relates to the technical field of alloy treatment, and discloses a low-temperature forging and rolling process for a high-performance frog, which comprises the following specific steps: step 1, material heating: selecting high-strength alloy steel as a raw material of the frog, and heating the high-strength alloy steel to 650-800 DEG C to ensure that the plasticity and toughness of the material are suitable for forging; 2, preliminary forging is conducted, specifically, the heated material is subjected to preliminary forging, the material is forged into the preliminary shape of the frog through a die forging technology, and the basic size and shape are ensured; by gradually reducing the gap between the rollers, the frog obtains higher precision and uniform deformation in the rolling process, and the method is beneficial to ensuring the consistency and repeatability of each rolling stage, so that the consistency and quality of a final product are improved; by adopting the mode of gradually reducing the gap between the rollers, the internal stress generated by the frog in the rolling process can be effectively reduced, the mechanical property of a final product is optimized by uniformly applying pressure, and the possible stress concentration problem is reduced.

The utility model belongs to the field of rolling technology, specifically is a kind of export sliding guide adjustment structure, including guide box;The guide box top is rigidly connected with stepper motor;Stepper motor output end is rigidly connected with rotating rod;Rotating rod both ends are rotatably connected with connecting rod;Connecting rod end is rotatably connected with support;The support one side is rigidly connected with wheel carrier;Wheel carrier both ends are slidably connected with slide rail;Wheel carrier bottom is rotatably connected with a group of guide wheels;The guide wheel bottom is rotatably connected with sliding block;A group of sliding grooves are arranged in the guide box top;The spacing between multiple groups of guide wheels can be adjusted by the rotation of rotating rod and related components driven by stepper motor, to adapt to the rolling conveying needs of different diameters, and multiple groups of guide wheels form continuous guide channel, apply uniform constraint to rolling, reduce deviation or shaking of rolling in conveying process, and its along straight line enters next rolling process, improves rolling precision and product quality.

This invention discloses a rolling method for 0.1mm thick ultra-flat and ultra-hard precision stainless steel sheets, including: preset rolling parameters, production preparation, rolling, and post-rolling cooling. The preset rolling speeds are: 100-120 m / min for the first pass, 90-100 m / min for the final pass, and 110-120 m / min for intermediate passes; the preset rolling pressures are: 740-800 KN for the first pass, 950-1000 KN for the second pass, and [missing information - likely related to the final pass]. The rolling pressure is 700-760 kN, with intermediate passes at 700-800 kN; the rolling oil temperature throughout the rolling process is 35-40℃; the preset plate profile curve is set as follows: slope value -20-40, center waviness value 80, and edge waviness value 20; the rolls are M42 rolls with a diameter of 38-40 mm; the roughness of the rolls used in the finishing pass and the pass preceding the finishing pass is 0.4-0.5 μm, and the roughness of the rolls used in the first pass and the remaining intermediate passes is 0.5-0.6 μm. This invention can produce 0.1 mm ultra-flat and ultra-hard precision stainless steel sheets with qualified and uniform surface roughness and flatness, small thickness tolerance fluctuations, stable surface quality, and effectively improved rolling accuracy, product qualification rate, and production efficiency.

The utility model discloses a numerical control four-roller plate bending machine, which relates to the technical field of plate bending machines, and comprises a machine body, a four-roller rolling and pressing assembly is arranged on the machine body, the front side and the rear side of the four-roller rolling and pressing assembly are respectively provided with a group of auxiliary supporting mechanisms, and the auxiliary supporting mechanisms are arranged on the machine body; the auxiliary supporting mechanism comprises a conveying supporting piece installed on the machine body, a bracket supporting piece is installed on the conveying supporting piece, a first hydraulic cylinder is installed between the machine body and the conveying supporting piece, and an adjusting piece is installed between the conveying supporting piece and the bracket supporting piece. According to the numerical control four-roller plate rolling machine, the plate before rolling and pressing is conveyed through the conveying supporting piece and the bracket supporting piece, the side portion of the plate during rolling and pressing can be supported, the lateral force of the plate is borne, the problem that the plate is prone to deformation is solved, and the rolling precision is improved.

The utility model discloses a kind of anti-deviation steel strip rolling device, it is related to steel strip rolling technical field.The utility model includes bottom box, the bottom box top side is fixedly connected with rolling frame, the rolling frame inside is fixedly connected with bottom roll, the bottom roll rear side is fixedly connected with drive box, the rolling frame inside is threadedly connected with adjusting lever, the adjusting lever bottom is movably connected with top roll by bearing.The utility model is designed by anti-deviation roller of conical body shape, when steel strip deviates, its inclined plane is contacted with steel strip edge, because the linear velocity gradient of roll surface changes along axial direction and forms asymmetric lateral friction force, restoring force pointing to rolling center is generated, drive steel strip automatic return normality.Anti-deviation roller is driven by second driving motor, keeps same direction rotation, avoids shear stress caused by reverse rotation, reduces steel strip edge scratch, indentation and edge curl risk, significantly improves rolling precision and product quality.

This invention discloses a synchronous power unloading device and its working method for high-speed wire rod mills, belonging to the field of metallurgical rolling equipment. The device includes a frame housing, a main shaft, an unloading disc, a power drive mechanism, a damping braking mechanism, and a synchronous control system. The unloading disc is a conical tensioning detachable I-beam structure, suitable for rapid feeding of large-diameter, heavy wire rods. The power drive mechanism actively provides unloading power, reducing wire rod tension. The damping braking mechanism is a disc brake with energized release and de-energized braking, automatically providing emergency braking in case of sudden failure. The synchronous control system achieves dynamic synchronization between unloading and rolling speeds through a tension sensor and PLC closed-loop speed regulation. This invention completely solves the problems of looseness, tangling, and breakage in high-speed, large-diameter, and fine-gauge wire rod rolling. It offers safe braking, efficient feeding, and precise synchronization, and is suitable for high-speed continuous rolling production of fine-gauge wire rods of various materials, significantly improving production efficiency and product qualification rate.