38results about How to "Reduce broken belt rate" patented technology

The invention discloses a method for preventing strip breakage on startup. The method includes, before strip winding, processing sheets with broken strips at first after stopping of a cold rolling mill due to strip breakage, compressing roll gaps of various frames and regulating the minimum rolling force of the roll gaps of the different frames after finishing the strip winding, generating exit tension of the different frames prior to regulating roll bending force of working rolls and intermediate rolls after finishing compressing of the roll gaps, and then, starting the cold rolling mill. The method for preventing strip breakage on startup includes control of the roll gaps of the cold rolling mill, selection of rolling force and tension and generation of tension, regulation of actual inclination and tension deviation of different frames, control of bending conditions of the working rolls and the intermediate rolls after startup, thereby effectively controlling times of startup strip breakage of sheets with the thickness lower than 0.6mm and improving production efficiency.

The invention discloses a 5182 aluminum alloy. The aluminum alloy is composed of Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti, and remaining Al and some inevitable impurities. A preparing technology of a tank cover material strip through the 5182 aluminum alloy comprises the steps of firstly, taking of the 5182 aluminum alloy; secondly, hot rolling, cooling and obtaining a blank for cold rolling; thirdly, primary cold rolling, and obtaining a cold-rolled intermediate product, wherein the total deformation amount ranges from 66% to 78%; fourthly, air cushion furnace annealing; fifthly, secondary cold rolling, wherein the total deformation amount ranges from 71% to 76%; sixthly, stretch bending and correcting. According to the 5182 aluminum alloy and the preparing technology of the tank cover material strip through the 5182 aluminum alloy, through high alloying, the alloy strength is improved, meanwhile, the content of Fe and Si is reasonably controlled, and bank mark generation is restrained; continuous air cushion furnace annealing is adopted, through high-temperature short-time annealing, the grains are adjusted and controlled, uniformity of the strip performance is improved, and meanwhile the strip surface quality is ensured.

The dynamic thickening rolling process of controlling break of cold rolled thin strip steel has weld seam tracking system used in measuring the weld seam position accurately, and features that in the range of 50 m around the weld seam, the strip steel thickness is increased to 1.0-1.5 times the original target thickness. Two wedge rolling processes are used to increase the rolled thickness dynamically, so as to lower the break rate of the thin rolled material. The present invention has the advantages of reduced strip steel breaking rate, high production efficiency, etc. and is suitable for multi-frame continuous cold rolling machine with 4, 5 or 6 frames.

A welding wire filling laser welding method utilizing non-oriented silicon steel includes steps of (1), taking plain carton steel with the silicon content smaller than 1.0% or low-grade non-oriented silicon steel as a leading tape for laser splice welding, taking non-oriented silicon steel with the silicon content ranging from 1.0%-3.5% as a base material for laser splice welding, cutting the tail of the leading tape and the head of the base material and the splicing the two together; (2), performing laser welding by a laser welder with the laser power of 5.0-9.0KW, the welding speed of 2.0-5.8meter/minute and the welding wire filling speed of 3.0-5.8meter/minute; and (3), selecting the plain carton steel with the silicon content smaller than 1.0% or low-grade non-oriented silicon steel as a leading tape after finishing welding, and then repeating the above steps to realize continuous productions. The welding wire comprises, by weight, C</=0.10%, Si</=0.85%, Mn</=0.98%, P</=0.015%, S</=0.015%, Cr</=0.013%, Al</=0.010% and the balance being Fe; and helium gas is selected as a protective gas for protecting and cooling welded joints during laser welding.

The invention discloses an aluminum foil for a high performance 1100 alloy lithium ion battery and a preparation method thereof. The aluminum foil is prepared from the following raw materials in percent by mass: 0.4-0.6% of Fe, 0.1-0.2% of Si, 0.11-0.17% of Cu, less than or equal to 0.05% of Mn, less than or equal to 0.05% of Mg, less than or equal to 0.02% of Zn, 0.01-0.03% of Ti, greater than orequal to 99.00% of Al and the balance inevitable impurities. The components and a thermal treatment process of the alloy are adjusted, so that the mechanical property (over 260 MPa) of a product is improved greatly. The tensile strength and the ductility reach the top level. The rate of strip breakage in a downstream step (coating and roll extruding) of the alloy is reduced greatly, so that purposes of improving the efficiency and stabilizing the quality are achieved. By adopting the novel thermal treatment process, the inner structure of an aluminum alloy material is improved, and the mechanical property is optimized, so that the machinability of the aluminum foil in a follow-up production process is better. Pass distribution is optimized, so that the mechanical property of the materialis improved effectively. The shape of the panel is optimized, so that the production efficiency of the product is improved.

A composite cold rolling line includes a feed unit, a first rolling unit at downstream of the feeding unit, an annealing and descaling unit at downstream of the first rolling unit, and a pickling unitat downstream of the annealing and descaling unit, a second rolling unit at downstream of the pickling unit, and a back-feed unit at downstream of the second rolling unit. The first cold rolling millcan perform preliminary rolling before the annealing and pickling process. The product can reduce the thickness of the rolling required for the second rolling, produce a large amount of Cold-rolled thin hard-coated steel coils with continuous high productivity. Due to the initial rolling, the black-skin coils can reduce 30 to 70% of the amount of rust, reduce the number and length of rust removalequipment. In addition to equipment cost reduction, sand blast, usage of acid liquid and discharge of acid are reduced, and the environmental protection effects of energy saving and waste reduction are realized.

The invention discloses a method for lowering the laser welding joint tapebreak rate of a chill state phosphate-containing IF (interstitial free) steel plate with the thickness of 0.8-1.8 mm. The method comprises the following steps of 1) laser welding: connecting the head and tail of the steel plate by laser welding, wherein the power of a laser welding apparatus for laser welding is 2000-5000 W, and the welding speed is 3-20 m/min; high frequency induction heating equipment is not arranged at a welding head of the laser welding apparatus; 2) thermal treatment after welding: a high frequency induction coil is arranged at an outlet of the laser welding apparatus, and the length of the high frequency induction coil is greater than a welding joint by 0-100 mm; after welding, performing thermal treatment on the welding joint and the scope of at least 100mm on each side of the length direction of the welding joint. According to the method, thermal treatment is performed after laser welding, the strength and hardness of the welding joint and base metal are reduced simultaneously, the decrease amplitude of the strength and hardness of the welding joint is greater that that of the base metal, the strength and hardness of the base metal at the welding joint area is lower than the welding joint, and thus the welding joint tapebreak rate is lowered greatly.

The invention discloses high-grade non-oriented silicon steel and a production method thereof. The production method comprises the steps of smelting, continuous casting, hot rolling, acid pickling, trimming, normalizing and cold rolling. The molten steel finally obtained through smelting comprises the following chemical components in percentage by mass: less than or equal to 0.005% of C, more than or equal to 2.8% of Si, 0.5-1.2% of Als, 0.25-0.8% of Mn, less than or equal to 0.02% of P, less than or equal to 0.0040% of S, less than or equal to 0.0020% of N, less than or equal to 0.0020% of Nb, less than or equal to 0.0020% of V, less than or equal to 0.0020% of Ti and the balance of Fe and inevitable impurities. In the edge cutting procedure, the two sides of the hot-rolled coil plate are subjected to edge cutting, and the shearing width of the single side is 10-20 mm; normalizing is conducted in a cover type annealing furnace, the soaking temperature T is equal to (990-1010)-100 * [30 * (Si) + 20 * (Al)], the soaking time is 6 h, and then cooling is conducted; when the steel coil is cooled to a preset temperature T0 in the cover type annealing furnace, the steel coil is taken out and sent to a cold rolling line for cold rolling, the T0 is 120-180 DEG C, and the rolling force during first-pass rolling is constant and is 11000-12000 kN. According to the method, frequent strip breakage caused by high brittleness in the cold rolling process of the high-grade non-oriented silicon steel can be avoided.

The invention relates to an oxygen-free copper strip horizontal electromagnetic casting device and belongs to oxygen-free copper strip production and processing matched equipment. The oxygen-free copper strip horizontal electromagnetic casting device comprises a crystallizer shell, a medium-frequency power supply, an induction coil, an electromagnetic oscillator, a shielding cover, a cooling water tank, a bottom die and a pouring mechanism; the pouring mechanism consists of a tundish and a pouring gate plug; the tundish is arranged on the upper part of the crystallizer shell; the bottom of the crystallizer shell is provided with a pouring gate; the pouring gate plug is arranged in the pouring gate; the tundish is communicated with the upper part of the crystallizer shell through the pouring gate; the upper part of the crystallizer shell is provided with the induction coil; the electromagnetic oscillator is connected with the induction coil; the induction coil is connected with the medium-frequency power supply; the induction coil is formed by winding pure copper of which the section is rectangular; the circulating cooling water is filled in the hollow part of the induction coil for the primary cooling; a cooling water box and a shower pipe are arranged on the lower part of the crystallizer shell, and spray water to cool the crystallized stripped copper blank for the secondary cooling; and the bottom of the crystallizer shell is provided with the bottom die.

The invention discloses a method of reducing pickling continuous rolling strip breakage rate of chromium-containing high carbon steel. The method comprises the following steps of welding a strip tailof a previous coil of strip steel and a strip head of current strip steel together and achieving first time tempering during welding; and then carrying out second time tempering and third time tempering successively, and carrying out cold continuous rolling after tempering. By controlling process parameters of welding and carrying out tempering processes for three times after welding, the ductility of a weld joint is improved, so that the strip breakage rate of the chromium-containing high carbon steel rolled by a pickling continuous rolling unit is further reduced, and therefore, online highspeed batched production of the chromium-containing high carbon steel on the pickling continuous rolling unit is realized smoothly.

The invention belongs to the field of welding correlation technology, and discloses a multifunctional welding equipment and method for continuous rolling. The multifunctional welding equipment for continuous rolling comprises a vertical transmission mechanism, a laser welding connector, an electric arc welding gun, a connecting seat and a machine frame, the vertical transmission mechanism is arranged on the machine frame, and the laser welding connector is arranged on the vertical transmission mechanism; the connecting seat is arranged on the machine frame, and the electric arc welding gun isconnected to the connecting seat; and the laser welding connector comprises a second cavity body and two reflecting mirror modules, the second cavity body is connected with the vertical transmission mechanism, the two reflecting mirror modules are separately and detachably arranged on the second cavity body, the two reflecting mirror modules are used for changing the light path transmission direction of a laser beam entering the second cavity body, and the laser beam is reflected by the two reflecting mirror modules and incident perpendicularly on the surface of a piece to be welded. The multifunctional welding equipment for continuous rolling improves production rhythm, functions are complete, and the structure is compact.

The invention provides a method for reducing strip breakage of oriented silicon steel intermediate annealing. The method comprises the following steps of: in the intermediate annealing process of a continuous annealing furnace, ensuring the temperature of a steel plate to be 55-80 DEG C before furnace entrance by raising the alkali-washing-section cleaning and alkali-spray-washing-section alkali liquor temperature of the annealing furnace and air temperature of a hot-air dryer at the outlet of the alkali washing section; and ensuring the temperature of the steel plate after furnace discharge to be 85-100 DEG C by raising the air temperature of the hot-air dryer at the outlet of the annealing furnace and lowering the output power and cooling capacity of a fan at the protective gas cycle injection cooling section. During oriented silicon steel intermediate annealing according to the technical scheme, the strip breakage rate is greatly reduced, the time of causality is lowered, the unit operability is improved, and the consumption is lowered.

The invention relates to a longitudinal flat overlapping joint die of a cable Al-plastic composite tape, which is a closed die and provided with an Al-plastic composite tape guide groove and a coned overlapping cavity that are connected together, a cable core guide pipe is arranged in the Al-plastic composite tape guide groove, the coned overlapping cavity is provided with a circular outlet, and the wall of the coned overlapping cavity is provided with a plurality of holes. The invention has the advantages of less quantity of dies and simple structure, can reduce the die cost and the strip breakage rate of the Al-plastic composite tape because the Al-plastic composite tape is not embossed in advance when wrapping, improves the production speed and the longitudinal overlapping quality of the Al-plastic composite tape, and ensures that the cable has excellent waterproof and moisture-preventing properties.

The invention discloses a strip breakage prevention cold rolling mill line and a strip breakage prevention rolling method. The strip breakage prevention cold rolling mill line comprises a high-temperature uncoiler, a first turning roll, a rolling mill, a second turning roll and an outlet coiler which are arranged in sequence. The first turning roll and the second turning roll are configured in the mode that the part, between the first turning roll and the second turning roll, of a steel belt straightly penetrates through a roll gap of the rolling mill, and the high-temperature uncoiler comprises an uncoiler body, a heating device for heating the uncoiler body and a heat preservation cover arranged on the periphery of the uncoiler body. The high-temperature uncoiler is arranged on the cold rolling mill line, so that the hot rolled steel coil is preheated before cold rolling, the temperature of the steel coil before cold rolling is improved, the strip breakage rate during cold rolling is reduced, the length and occupied space of the cold rolling mill line are prevented from being increased, and the temperature drop of the outer layer of the steel coil when the steel coil is conveyed to the cold rolling mill line from preheating equipment is avoided; and the rolling of a previous steel coil and the preheating of the next steel coil can be achieved at the same time, and the rolling efficiency and the yield are greatly improved.

The invention discloses a method for avoiding belt breakage of a cold-rolled hot forming steel welding line rolling mill. The method specifically comprises the following procedures that firstly, to improve extensibility of a welding line, front and back heat parameters and welding speed of a laser welding machine are optimized; secondly, low-temperature tempering treatment is conducted on the welding line, and grains of a welding line heat-affected zone of the laser welding machine are refined; and thirdly, a pressure detection instrument is additionally arranged in a cup drawing test machinehydraulic jacking breakage system for detecting a welding line sample plate and is used for detecting the pressure during welding line jacking breakage, the welding line extension performance is judged according to the pressure during welding line jacking breakage, and the quality of the welding line is judged. By means of the method, the hot forming steel welding line ductility is improved by 10%, the rolling mill belt breakage rate of the cold-rolled hot forming steel welding line is reduced to 1.5% from 100%, and the cold-rolled hot forming steel ton-steel hourly output is increased.