34results about How to "Avoid stacking steel accidents" patented technology

The invention belongs to the field of metallurgy and relates to rolling process of lead-containing free-machining steel. A rolling mill is used for rolling, in the rough rolling process, the rolling temperature is controlled at 1030-1060 DEG C, the former three-pass material form is reduced 1-3mm based on the standard material form; in the intermediate rolling process, the roll material form is the standard material form, and the rolling temperature is controlled at 980-1030 DEG C; in the pre-finish rolling process, the roll material form is the standard material form, the rolling temperature is controlled at 1060-1030 DEG C, and the temperature of the rolled piece reaches 1005-1040 DEG C after the pre-finish rolling process; in the finish rolling process, the temperature of the rolled piece in a finishing mill is less than 980 DEG C, the roll material form is the standard material form, and the rolling temperature is controlled at 1020-1050 DEG C. The rolling process can prevent steel heaping caused by the cleavage crack of the cold, hot and frailty susceptible head of the rolled piece, prevent sliding accident caused by the high temperature of the steel, steadily increase the yield of the lead-containing free-machining steel, obviously reduce the waste, and greatly reduce the 100t steel fault time.

The invention discloses a rough rolling vertical roll shallow pass treatment method. The method comprises the steps that a to-be-rolled steel blank is determined from a rolling plan; whether width fixing needs to be conducted on the to-be-rolled steel blank through a width-fixed pressure machine or not is judged, and a judgment result is obtained; the width self-learning function of a rough rolling unit is closed; the first opening degree of a front guide board and the width of a first roll seam of a vertical roll are adjusted, and forward rolling is conducted; in the forward rolling process,the to-be-rolled steel blank is processed according to the judgment result and guided in through the front guide board, and the vertical roll serves as a transition roller way to conduct shallow passtreatment on the to-be-rolled steel blank; the second opening degree of the front guide board and the width of a second roll seam of the vertical roll are adjusted, and inverse rolling is conducted; and in the inverse rolling process, the vertical roll serves as a transition roller way to conduct shallow pass treatment on the to-be-rolled steel blank, and the to-be-rolled steel blank is guided outthrough the front guide board. The rough rolling vertical roll shallow pass treatment method provided by the invention can avoid capacity loss caused by halt production and ensure controllability ofthe width of finished products.

The invention provides a wire rod idling device and a steel rolling device. The wire rod idling device comprises a fixed base, a supporting frame and an idling guiding groove structure. The fixed base comprises a fixed plate, sliding plates, a wedge block, a stopping block, a guiding rail, a positioning frame and a piston cylinder. The two sides of the bottom of the fixed plate are fixedly provided with the sliding plates. The wedge block is fixed to one end of the fixed plate, and the stopping block is welded to the other end of the fixed plate. A piston rod of the piston cylinder is connected with the stopping block. The fixed plate is connected to the guiding rail in a sliding mode through the sliding plates. The positioning frame is arranged on one side of the guiding rail. A positioning slope used for being matched with the wedge block is arranged on the positioning frame. The idling guiding groove structure is fixed to the fixed plate through the supporting frame. The fixed base is firmly fixed through the mutual matching of the piston rod, the guiding rail and the positioning frame, so that wire rods smoothly pass through the idling guiding groove structure, the steel stacking accident caused when the idling guiding groove structure waggles is avoided, and product quality and production efficiency are improved.

The invention relates to the technical field of high-speed bar yield improvement, and discloses a high-speed bar yield improvement method. The method comprises the following steps that (1) the yield is improved by controlling a heating zone with the heating temperature controlled at 1,000-1,400 DEG C to be preserved for 4-7 hours, the start heating temperature in a heating furnace is 1,100 DEG C,and the temperature in the heating furnace is controlled higher than or equal to 850 DEG C after the heating is finished; a heating system is strictly executed, and the heating efficiency is improved,so that the billet heating temperature is promoted to be uniform, black marks do not appear, the oxidation burning loss is reduced, the furnace condition is kept normal, the maintenance difficulty ofthe bottom of the heating furnace is reduced, and the production is guaranteed to be smooth. According to the method, less finished scale is generated due to good guide groove air nozzles of water tanks, good water nozzle gaps, correct maintenance and water pressure increase of the water tanks, the yield of high-speed bars is integrally improved from multiple aspects, therefore, it is convenientfor an enterprise to implement the method effectively and efficiently, the implementation efficiency and the yield of the high-speed bars are improved, and the method is convenient to apply.

The invention discloses a roughing mill level value giving method, which comprises the following steps of: judging whether a plate blank from a heating furnace meets the last-pass steel throwing condition of a first rolling mill or not, and if so, judging whether steel exists in a second rolling mill or not; if no steel exists in the second rolling mill, controlling the horizontal value of the second rolling mill to be set to a target horizontal value; and the target horizontal value is a horizontal value, corresponding to the previous plate blank, of the second rolling mill in the same heat as the next plate blank. The method can solve the problems of intermediate plate blank waste pushing accidents and steel piling accidents caused by plate blank head deviation in a hot-rolled strip steel rolling process in the metallurgical industry.

The invention provides a hot-rolled strip steel laminar cooling device and a control method thereof. The hot-rolled strip steel laminar cooling device and the control method thereof are used for solving the problem of water accumulation of a steel strip in the prior art. The hot-rolled strip steel laminar cooling device is located between a finishing mill group and a coiling machine and comprisesa middle cooling section and a tail end side water spraying group, the middle cooling section is used for cooling the steel strip, and the tail end side water spraying group is also used for cooling the steel strip. The tail end side water spraying group comprises at least one water spraying nozzle arranged on the side face in the steel strip conveying direction, the purging angles of the water spraying nozzles are larger than or equal to the width of the steel strip, the water spraying directions of the water spraying nozzles deviate to the steel strip conveying direction or the direction opposite to the steel strip conveying direction, and an acute angle is formed between the water spraying directions of the water spraying nozzles and the left-right direction. Accumulated water of the steel strip can be swept away.

The invention relates to the technical field of strip sheet mill production line mechanical equipment, and discloses a guide switching device capable of automatically adjusting the clearance. The guide switching device comprises an upper pinch roll swing arm assembly, an upper guide switching device and a lower guide switching device. The upper guide switching device is composed of a supporting connecting arm, a first connecting cross beam, a second connecting cross beam, a hook, air cylinders, a water scraping wear-resisting plate and an upper guide plate. The lower guide switching device iscomposed of adjusting screws, a lower switching guide hydraulic cylinder, a lower chute plate and a lower switching guide frame. One end of the lower chute plate is connected to the lower switching guide frame through a connecting pin shaft, and the other end of the lower chute plate is connected to the lower switching guide frame through the two sets of adjusting screws. According to the guide switching device, the problem that the head of thin strip steel is thin and is upwarped to be wound into an upper pinch roll is avoided, meanwhile, the situation that the thick head is buckled downwardsto be drilled into the clearance of the lower chute plate and the steel stacking accident between the lower pinch roll and a coiler mandrel are avoided, and production stability is guaranteed.

The invention relates to a multi-wire slitting and rolling controlled cooling device for a bar . The multi-wire slitting and rolling controlled cooling device for the bar comprises a plurality of single-wire cooling devices which are arranged in parallel; the multiple single-wire cooling devices are arranged on a same fixed water beam; the accuracy of alignment of a running middle line of the baris remarkably improved; the steel stacking risk of the bar is reduced; each single-wire cooling device comprises a transition guide groove, a cooling structure and a collection guide groove which aresequentially arranged in the production direction of the bar; cooling structures comprise water cooling units, and water counterattacking units and empty passing units. According to the structure arrangement of the water cooling units and the empty passing units, the quick positioning installation of cooling nozzles and empty passing pipes can be realized, first assembling seats of the cooling nozzles and second assembling seats of the empty passing pipes are arranged to be of the same structure, the different distribution of the cooling nozzles and the empty passing pipes on the fixed water beam can be realized by adopting the same installation mode, and accordingly, the production process and the production error can be quickly adjusted, such as from continuous cooling to intermittent cooling process and temperature difference between wires.

The invention provides a method and device for tracking the head part of strip steel. The method comprises the steps: if it is determined that a current identity value corresponding to a shearing mark position of a flying shear is a valid identity value, acquiring first actual distance and first tracking distance of operation of the strip steel; if it is determined that a first difference value between the first actual distance and the first tracking distance meets a preset distance interval, generating a first strip steel head part tracking signal; when it is determined that a detection signal of a metal detector changes from an invalid identity value to the valid identity value, acquiring second actual distance and second tracking distance of the operation of the strip steel; if it is determined that a second difference value between the second actual distance and the second tracking distance does not meet the preset distance interval, giving up generation of a second strip steel head part tracking signal; and tracking the head part of the strip steel according to the first strip steel head part tracking signal. In such a manner, even if the head part of the strip steel cannot be tracked through the detection signal, the head part of the strip steel is triggered and tracked according to the second strip steel head part tracking signal, and the head part of the strip steel is accurately identified, so that a steel-heaping accident is avoided, and the production efficiency is guaranteed.

The invention discloses a horizontal loop guide roller device which comprises a loop table, a guide roller with a table and a lining arranged in the guide roller with the table. The guide roller device further comprises an eccentric shaft, a bearing set and locking devices used for locking the two ends of the bearing set. The eccentric shaft comprises a first shaft part and a second shaft part arranged in the lining. The guide roller with the table is connected with the loop table through the first shaft part. The bearing set is arranged between the second shaft part and the lining and bears axial loads in the axial directions of the two ends of the bearing set by means of the series-connection arrangement and back-to-back arrangement between bearings. According to the guide roller device, the loop bearings and clamping springs can be prevented from being damaged, the situation that because the guide roller plays, a rolled piece is scratched by an outlet guide groove is avoided, the steel piling accidents caused by falling-off of the guide roller are eradicated, abrasion to the loop outlet guide groove and an inlet guide of a rolling mill is reduced, the product quality is improved, and rolling cost is reduced.

The invention discloses a hot rolling process of non-oriented silicon steel. Aiming at the phenomenon that the width of the head of a plate strip within 100m in the finish rolling process is easily narrowed in the finish rolling process due to small deformation resistance in the hot rolling process of non-oriented silicon steel, an intermediate billet width compensation amount model is established according to main factors such as chemical components, rolling temperature and rack tension, and the intermediate billet width compensation amount is calculated according to the model. And meanwhile, a short-stroke control method of the vertical roller is combined, so that the purpose of reducing the width difference of the through roll is achieved. And the width difference of the whole roll is reduced from 30mm to below 15mm, and the edge cutting amount and the head and tail loss are reduced.

The invention discloses an effective method for solving the problem of hot rolling coiling indentations, and relates to a method special for a control technology of a metallurgical hot rolling strip steel coiling machine. The control precision of the head of strip steel is improved from the four aspects of correction tracking calculation, wrapper roller pressing force compensation, wrapper rollerbounce-off value compensation and position control-force control switch critical point delay compensation, and correction tracking comprises load correction and forward slip compensation correction within a protection range, so that the pressure control time sequence deviation borne by the head of the strip steel is greatly reduced, the pressure impact is obviously reduced, steel stacking accidents are effectively avoided, and the problem that head indentations cannot be thoroughly eliminated in an existing control scheme is solved.

The invention belongs to the field of anti-slip coating, and particularly relates to anti-slip coating as well as a preparation method and application thereof. The coating is prepared from the following raw materials in parts by weight: 20 to 100 weight parts of wear-resistant agents and 5 to 30 weight parts of attaching agents; preferably, the wear-resistant agents are any one kind of materials or a mixture of two kinds of materials or more from calcium carbonate, tricalcium silicate and silicon dioxide; more preferably, the wear-resistant agents are prepared from 20 to 50 weight parts of calcium carbonate, 5 to 30 weight parts of tricalcium silicate and 1 to 10 weight parts of silicon dioxide. The raw materials of the anti-slip coating comprise the wear-resistant agents and the attaching agents; the anti-slip effects are good; the rolling trial run pile steel punching accidents can be avoided; the production and the use are convenient.