42results about How to "Reduce cut loss" patented technology

The invention relates to a chipping control technique of head and rear thickened ends of a steel tube which is used in a stretch reducing process of a seamless steel tube. A control method of the thickened ends of the steel tube of a stretch reducing machine computes a control factor table of the thickened ends of the steel tube according to the thickness distribution rule of tube end walls of the stretch reducing machine, and by utilizing the factor table, the control method can adaptively increase and decrease the number of machine frames that participate in the CEC action according to the length change of the thickened ends in the rolling process, and realize the shortening of the head and rear thickened ends by coordinating with the adjustment of additive tension that acts on the head and rear thickened ends of the steel tube; the computation of the CEC factor table of the stretch reducing machine comprises the following steps: a basic speed governing level and a largest speed governing level are determined according to average tension; original CEC speed governing factors are computed according to the working diameter change of a roller; an original CEC speed governing factor table is constructed; the number of the machine frames that simultaneously participate in the CEC action in each machine frame position is determined according to the extensibility of the steel tube; the original CEC factor table is revised by combining with the number of the machine frames that simultaneously participate in the CEC action in each machine frame position. The chipping control technique of the head and rear thickened ends of the steel tube can effectively shorten the length of the thickened ends of the steel tube and improve the steel tube yield.

The invention discloses an aluminum alloy profile torque correction device which at least comprises a torsion transmission mechanism. The side edge of the torsion transmission mechanism is connected with a front end profile clamping device, a base of the torsion transmission mechanism is connected with a fixed torsion machine base through a bolt, the fixed torsion machine base is connected with a lathe bed through a bolt, the lathe bed is provided with a movable clamping machine base capable of sliding along a track on the lathe bed, the bottom of the movable clamping machine base is connected with a driving device, and the side edge of the upper portion of the movable clamping machine base is connected with a rear end profile clamping device. A low-energy-consumption and mechanical braking mode is utilized to be matched with a torsion angle precision measurement system, the torsion angle of the profile cross section of an incoming material is determined accurately, precise reversal angle values are given, and thus the cross section torsion form of a profile is corrected. By controlling the position of a profile clamping device through a displacement sensor, the damage to the clamped part of the profile can avoided, and the cut damage caused by torsion correction is reduced.

A method for controlling side turning of a hot rolling stainless steel band belongs to the metallurgy field. The method is characterized in that regarding a rough rolling vertical roll, the side pressure of a first pass is smaller than and equal to 200KN, the side pressure of a third pass is from 300KN to 800KN, and the side pressure of a fifth pass is from 100KN to 300KN. Regarding a rough rolling flat roll, the reduction rate of a first pass is 54.1%, the reduction rate of a second pass is 44.5%, the reduction rate of a third pass is 33.8%, the reduction rate of a fourth pass is 23%, and the reduction rate of a fifth pass is 14.1%. By means of reasonable control of flow deformation of metal in the process of stainless steel hot rolling, the method for controlling side turning of the hot rolling stainless steel band controls rough rolling and broadsiding in an appropriate range, effectively controls the side turning width of the stainless steel band, reduces trimming amount of cold rolling finished products, and improves yield of the cold rolling finished products.

The invention discloses a length detection method of an uncooled section of a head of a hot rolled strip steel. The detection method is characterized by comprising the following steps of: (1) arranging image acquisition equipment between a laminar flow cooler and a coiler of a hot rolling production line; (2) connecting the image acquisition equipment with an image processing and recognition system through a network; (3) connecting the image processing and recognition system with a production line process control system; (4) photographing and acquiring an image of the head of the strip steel by the image acquisition equipment when the head of the strip steel enters a working region of the image acquisition equipment; (5) transmitting the acquired image of the head of the strip steel to the image processing and recognition system; and (6) processing and analyzing, by the image processing and recognition system, the image of the head to obtain a length value of the uncooled section of the head of the strip steel. According to the detection method, the problem of length detection of the uncooled section of the head of the strip steel in a hot rolled strip steel production process is solved, and the yield of thick specification production of hot rolling plants is improved.

The invention provides a prediction method for the flaw length of a Cu-Al sandwich rolling-bonded band head. The prediction method comprises the following steps: obtaining the parameters of a prediction model for the flaw length of the Cu-Al sandwich rolling-bonded band head, and according to the parameters of the prediction model for the flaw length of the Cu-Al sandwich rolling-bonded band head, obtaining the thickness of a rolling-bonded initial band material, the half-thickness of the rolling-bonded initial band material, the thickness of an initial upper-layer band material, the half-thickness of an initial inner-layer band material and the half-thickness of a rolling-bonded final band material; obtaining a pass reduction rate according to the thicknesses of a rolling bonding outlet and a rolling bonding inlet; and obtaining the predicted flaw length of the band head through establishing the prediction model for the flaw length of the Cu-Al sandwich rolling-bonded band head and substituting the parameters of the prediction model for the flaw length of the Cu-Al sandwich rolling-bonded band head into the prediction model for the flaw length of the Cu-Al sandwich rolling-bonded band head. Therefore, the flaw length of the bonded band head can be predicted; as a result, the yield can be greatly increased, and unnecessary cutting losses are reduced.

The invention discloses a device for different steel grade continuous casting automatic iron plate insertion, and belongs to the technical field of metallurgy continuous casting. The device comprises a T-shaped base of a tundish, a nozzle quick-changing oil cylinder swing part, a movable swing part and an iron plate insertion body part. The invention also discloses a method for different steel grade continuous casting automatic iron plate insertion, which comprises the steps of during different steel grade continuous casting, inserting the movable swing part on the T-shaped base of the tundish so as to enable the movable swing part to be located at the middle of the bottom of the tundish, meanwhile putting down a swing rod of the nozzle quick-changing oil cylinder swing part, respectively connecting two long rods of the iron plate insertion body part into hollow swing rods at the lower parts of the nozzle quick-changing oil cylinder swing part and the movable swing part from the inner arc side of a crystallizer, and connecting firmly by using iron wires. By adopting the device and the method, the different steel grade same-tundish continuous casting iron plate insertion automation is realized, the continuous casting furnace number of a casting machine is increased, the cost of tundish refractories is reduced, the operability of the casting machine is indirectly improved, the production preparation time is saved, and the molten steel yield is also 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 relates to a drawing and rolling combined type multi-plate continuous forming method for variable-section plate springs. According to the drawing and rolling combined type multi-plate continuous forming method, the manner that one raw material is continuously rolled into multiple variable-section plate springs is adopted, a flat steel product raw material of n times of length is heated and fed into a variable-section rolling machine, a drawing machine clamps the flat steel product raw material and applies tension to the flat steel product raw material at the front end, under the combined action of the tension and the rolling force, variable-section rolling of the n-0.5 plate springs at the back end is completed firstly, and then the remaining 0.5 plate spring is rolled. By the adoption of the drawing and rolling combined type multi-plate continuous forming method for the variable-section plate springs, the production efficiency can be significantly improved, the end cut loss can be reduced, and the yield can be improved; and in this way, the production cost is reduced, and economic benefits are increased.

The invention belongs to the technical field of resin-based composite material forming, and relates to preparation equipment and method for a prefabricated body with a bent section. For the laying process of an undevelopable complex curved surface, the external force applied by a hand is uncontrollable and high in randomness, the actual orientation of fibers is difficult to predict, so that the mechanical property dispersity of the composite material is high, and the performance value deviates from an expected design value; and the preparation equipment of the prefabricated body with the bentsection is used for forming a planar strip into the prefabricated body with the n-shaped section, and comprises a feeding and flat strip double-roller guide area I, a geometric section rolling formingarea II and a bent rolling forming and guide output area III which are sequentially connected. Fibrosis is controllable, and reliability and repeatability are good; the operation is continuous, the process is continuously repeated to obtain the preform with unlimited length, and the production efficiency is high; and the cutting loss in the forming process is small, the material cost can be reduced, and forming of preforms with different sections is met.

The invention discloses a slab rolling method comprising the following phases: sizing rolling, broadside rolling and finishing rolling; before sizing rolling, whether the difference between a rolling mill barrel length and a blank length is bigger than 0.5m or not is determined; if the difference is <=0.5m, the broadside rolling is directly carried out; if the difference is bigger than 0.5m, the sizing rolling is carried out; when the sizing rolling is carried out, whether the blank broadside rolling ratio is smaller than 1.4 or not is determined; if the blank broadside rolling ratio is smaller than 1.4, a thin-side broadside rolling mode is carried out; if the blank broadside rolling ratio is not smaller than 1.4, a Mizushima Automatic Plan View Pattern Control System (MAS) mode is carried out; the slab rolling method can reduce cutting loss, thus improving rolling yield.

The invention provides a steel-coil-sampling fixing device, and belongs to the technical field of steel coil sampling. The device comprises a land-roll driving roll, a land-roll driven roll, a universal driving shaft arranged at the outer side of the land-roll driven roll, swing arms connected to two end of the universal driving shaft, an upper pinch roll arranged between terminal parts of the swing arms, a lower pinch roll located below the upper pinch roll, and a swing hydraulic cylinder which is connected with the swing arms, and can control lifting and falling of the upper pinch roll by driving the swing arms. The steel-coil-sampling fixing device can ensure that steel coils are cut according to required lengths, reduce the cutting loss caused by overlength lengths of unfolded steel coils, and the security in the process of steel sample cutting can be improved.

The embodiment of the invention provides an angle rolling process parameter determination method, device and equipment and a readable storage medium, and the method comprises the following steps: starting from an initial rolling pass, circulating the following steps to determine the rolling pass of angle rolling: calculating the maximum steel rotating angle under the current rolling pass; according to the maximum steel rotating angle, the width of the plate blank after rolling of the current rolling pass is calculated, and a first corner of the plate blank after rolling of the current rolling pass is calculated; when the number of the current rolling passes is an odd number, whether the rolling passes are increased or not is determined according to the relation between the width of the rolled plate blank and the target width; when the current rolling pass is an even number, whether the rolling pass is increased or not is determined according to the relation between the first corner and 90 degrees, when the first corner is equal to 90 degrees and the width of the rolled plate blank is smaller than the target width, the rolling pass is increased, and when the first corner is equal to 90 degrees and the width of the rolled plate blank is larger than or equal to the target width, circulation is ended; and determining that the current rolling pass is an angular rolling pass.

The invention discloses a production process for rolling an extreme thin gauge checkered plate through a thin slab, which belongs to the field of steel production. The production process comprises the steps of slab heating, rough rolling, finish rolling, laminar cooling and coiling, in the slab heating process, the thickness of the slab is selected to be 90-105 mm, the slab is placed in the middle of a furnace, and the cantilever amount of the two ends of the slab is controlled to be smaller than or equal to 700 mm; the overall time in the furnace is controlled to be 70-140 minutes; the furnace temperature of the first heating furnace is controlled to be 750-900 DEG C; the furnace temperature of the second heating is controlled to be 1050-1130 DEG C, and the total in-furnace time of the first heating and the second heating is controlled to be 35-70 min; and the temperature of the third heating furnace section and the soaking furnace section is controlled in combination with the in-furnace time. Compared with the prior art, the method can be used for continuously and stably producing the extreme thin checkered plates in batches by using the thin slabs.