31results about How to "Control surface quality" patented technology

The invention discloses a method for rolling a thin high-strength steel plate of a single-frame steckel mill. The method comprises the following steps: producing the finished product of a high-strength steel plate with a thickness less than 10 millimeters by using a blank with the thickness of 150 millimeters and the length more than 10 meters; and then acquiring the thin high-strength steel plate with qualified property and plate shape by controlling a tapping temperature, a coiler furnace temperature, a reduction in last pass, a roller force, a final rolling speed and a high pressure water de-scaling system. When the rolling method is used for producing the thin steel plate, the thin high-strength steel plate is rolled by utilizing the heat preservation function of front and back mill coiler furnaces and controlling the tapping temperature of the blank, the reduction in the last rolling pass, the roller force and the final rolling speed, and the acquired plate shape and property of the steel plate are both qualified, thereby increasing the rolling mill capacity and achieving high plate yield and high property yield.

The invention provides a preparation method of ultrathin Ta-W alloy foil, and belongs to the technical field of Ta-W alloy machining. The preparation method includes the steps that cyclic operation of alloy billet prepared through a powder metallurgy method, cold rolling cogging, and cold rolling and vacuum annealing, 3-5 micrometer foil annealing, and the like. The thickness of the prepared foil can reach 3-5 micrometers. The preparation method is simple in process, the prepared foil is high in precision, and compared with pure Ta foil and other Ta-W alloy foil, the ultrathin Ta-W alloy foil has the advantages of being high in strength, good in surface quality, and the like. The prepared Ta-(5.0-7.5 wt%)W alloy foil with the thickness of 3-5 micrometers is suitable for high-power microwave tubes, traveling wave tubes, and other vacuum devices of electronic components, aerospace, and other industries. The preparation method has great significance on achieving high-power high-performance microwave tube localization, improving microwave tube using performance, prolonging service life, and the like.

The invention provides a thin-walled vane nine-point control variable-allowance milling method based on Newton interpolation. Modeling is carried out by utilizing a three-dimensional modeling software, and an auxiliary surface and a boundary surface are formed, so that a driving surface is determined by utilizing a section line lofting process. Cutter machining paths are generated according to the driving surface, and the machining allowance of each cutter position point on each machining path is determined by adopting a Newton interpolation method. Finally, vanes are cyclically processed according to symmetrical milling rules. Compared with a traditional longitudinal fixed-allowance cutting and spiral milling method, the thin-walled vane nine-point control variable-allowance milling method has the advantages that technical problems, such as large torsional deformation, low contour precision, poor section position tolerance and difficult error control, in the machining process can be solved; and by adopting a Newton interpolation process allowance fine adjustment method, surface quality can be more comprehensively controlled, and problems, such as large bending deformation, poor section position tolerance and low surface contour precision, in the machining process can be effectively solved.

The invention discloses steel for an electric power tower, which comprises the following chemical components in percentage by weight: 0.04-0.10wt% of C, 0.01-0.10wt% of Si, 0.60-1.20wt% of Mn, less than 0.02wt% of P, less than 0.008wt% of S, 0.01-0.06wt% of V, 0.01-0.04wt% of Ti, more than 0.02wt% of Alt and the balance of Fe and inevitable impurity elements. The invention also discloses a method for producing the steel for the electric power tower. The invention has the characteristics that: on the basis of meeting the performance of the steel for the electric power tower, the surface quality of a hot-rolled steel coil is controlled through optimizing the chemical components, heating system, rolling process and the like of the steel for the electric power tower, thus the produced steel for the electric power tower has high strength, is easy to weld and is easy to coat, and the production cost can be lowered.

The invention provides a preparation method of an ultrathin Mo-Re alloy foil, and belongs to the technical field of Mo-Re alloy machining. The preparation method solves the problems that a Mo-Re alloy foil which is with the thickness smaller than 10 micrometers and good in surface quality is hard to prepare, and can be used for preparing the Mo-Re alloy foil which is with the thickness of 3-5 micrometers and good in surface quality. The preparation method comprises circulating operations of preparing an alloy billet with a powder metallurgy, cold rolling cogging, and cold rolling / vacuum annealing, and the method further comprises a step of annealing of a foil of 3-5 micrometers and other steps. The component range of a prepared alloy foil is, by weight, Re of 43.5-47.5%, and the balance is Mo. The thickness of the prepared alloy foil is 3-5 micrometers. The preparation method is simple in technology, the elastic coefficient of the prepared foil is 340-350 GPa, the tensile strength at 1200 DEG C is 220-260 Mpa, microhardness is 420-450 HV, the surface roughness (Rmax) is 0.02-0.05 micrometer, and the foil is suitable for platinotrons and travelling wave tubes and other vacuum components in aerospace equipment.

The invention discloses a soft mold auxiliary forming method for a variable section I-beam containing a corrugated flange plate. According to the soft mold auxiliary forming method for the variable section I-beam containing the corrugated flange plate, the non-closed form that a metal mold and a silicon rubber mold are combined is adopted; the silicon rubber soft mold is wrapped inside the metal mold; corrugated flange plate side pressurizing (internal pressure) is conducted through heat expansion of the silicon rubber soft mold, the hot pressing tank (external pressure) forming process is combined, and internal and external two-way pressurizing is conducted, so that the pressure applied to a complex section is uniform and controllable, integral curing forming of the composite variable section I-beam containing the corrugated flange plate is well achieved, and the problem that a corrugated structure is not easy to pressurize is solved.

The invention discloses a method for eliminating central looseness of a casting blank and improving density of the casting blank. The method includes arranging a plurality of sets of hold-down rollers in the rear of the exit of a fan-shaped section of a continuous casting machine and allowing the linear speed of the hold-down rollers to be synchronous with the casting speed of the continuous casting machine. The hold-down rollers are arranged in the rear of the fan-shaped section of the continuous casting machine, so that deformation on the middle portion of the casting blank is larger than that of the surface by changing set positions of the hold-down rollers, central gaps of the casting blank are eliminated, the problem about central looseness of the casting blank is solved, and the central density of the casting blank is improved; the forming process of the casting blank and the matching relation between the hold-down rollers and hold-down quantities are controlled, so that surface cracks of the casting blank can be effectively prevented, densification in central tissue can be improved, quality of the interior of the casting blank can be improved, and control over the quality of the surface of the casting blank can be realized.

The invention discloses a method for improving the surface quality of an LED copper belt and belongs to the field of control over the surface quality of the LED copper belt. The method includes the steps of rough rolling of a blank copper belt, primary annealing, primary cleaning, primary rolling, secondary annealing, secondary cleaning, secondary rolling, tertiary cleaning and the like. The surfaces of all rollers of a rolling mill are accurately ground through a high-precision numerical control roll grinder for primary rolling and secondary rolling, the surfaces of the rollers directly make contact with the copper belt, and the surface of the copper belt is ground. No brush roller grinding is adopted for secondary cleaning and tertiary cleaning, so that grinding non-uniformity and brush marks are avoided. When the blank copper belt is conveyed among all the procedures, a PET thin film is flatly laid on the surface of the blank copper belt, and therefore scrapes caused by direct contact of layers and the scrape problem which cannot be solved on equipment are avoided. By the adoption of the technical scheme, the scrapes in the production process can be greatly reduced, and the surface quality of the product can be improved.

The invention discloses a manufacturing method for a silicon-containing stainless steel seamless tube. The method comprises the following procedures: heating of a tube blank; perforating; cold rolling; heat treatment; straightening; and pickling. In the procedure of heat treatment, a short-time high-temperature heat treatment process is employed, heat treatment temperature is 1090 to 1110 DEG C, a heat preservation coefficient is 0.8 to 1.5 min/mm, and heat preservation time is determined according to steel tube thickness and is calculated by multiplying the heat preservation coefficient with the steel tube thickness; and in the procedure of straightening, a forward-backward bidirectional straightening method is employed, backward straightening is carried out after original unidirectional straightening, so the effect of integral fragmentation of a surface oxide skin is realized. According to the invention, the short-time high-temperature heat treatment process is employed, so the surface oxide skin becomes thinner and loose after heat treatment, which facilitates easy removal of the oxide skin during pickling; the forward-backward bidirectional straightening method is employed for integral fragmentation of the surface oxide skin, so the oxide skin left in pickling is eliminated, a better fragmentation effect is exerted on the loose oxide skin, and product surface quality after pickling is further guaranteed.

The invention discloses a method for controlling the acid washing quality of titanium tape rolls. An acid supply and drainage system for acid washing of the titanium tape rolls (19) comprises an acid preparation system and an acid washing process section. The method has the characteristics and effects that acid is supplied continuously and stably in the acid washing process section, and proper process rate and reaction temperature are matched, so that the stability of the acid washing concentration of the process section is ensured, the surface quality of the acid washed titanium tape rolls can be stably controlled, and excessive acid washing and under acid washing are prevented; the acid washing yield of the titanium rolls can be improved; the utilization rate of acid can be improved, the consumption of the acid can be reduced, the treatment quantity of waste acid is reduced, and environmental protection is facilitated; and the method is simple, easy to operate and strong in practicability.

The invention relates to a multifunctional lathe with tool rotation function, comprising a frame and a power distribution box; the frame is provided with a tool rotating shaft and a tool feeding device, a tool rotator is fitted to the tool rotating shaft, an end of the tool rotating shaft is provided with a grip disc type tool mounting disc, a tool is mounted in the tool mounting disc, a product carrier is fitted to the tool, the product carrier is disposed on a carrier feeding device on the frame, the carrier and the tool have perpendicular feeding directions, and the tool feeding device, the tool rotator and the carrier feeding device are connected to the power distribution box; the tool mounting disc is mounted on the tool rotating shaft and connected to the tool rotator, the tool feeding device is fitted to the carrier that can provide forward and backward feeding, processing a product in various shapes via various techniques can be achieved through changing the tool, tool feeding can be fitted to carrier feeding, a sidewall can be turned into a polygonal prism shape, and the surface quality of a workpiece can be controlled well.

The invention discloses a copper mould casting and ironing combined method for preparing corrosion-resistant Zr-based amorphous alloy. The method comprises the following steps: preparing a Zr-based amorphous alloy rod through a copper mould casting process; and carrying out surface treatment on the Zr-based amorphous alloy rod through an ironing process, so as to reduce roughness and obtain the corrosion-resistant Zr-based amorphous alloy.

The invention belongs to the field of metallurgic equipment, relates to a method for controlling pin positioning accuracy for pecker locking in an extruder, in particular to a method for controlling the pin positioning accuracy by a seamless tube extruding locking pin process. The method is characterized by comprising a perforation cylinder, a filling valve of a piston cavity, a drain valve of the piston cavity, a filling valve of a piston rod cavity and a drain valve of the piston rod cavity, wherein an oil path of the piston cavity of the perforation cylinder is connected with the filling valve of the piston cavity and the drain valve of the piston valve; an oil path of the piston rod cavity of the perforation cylinder is provided with the filling valve of the piston rod cavity and the drain valve of the piston rod cavity; and the filling valve of the piston cavity of the perforation cylinder, the drain valve of the piston cavity, the filling valve of the piston rod cavity and the drain valve of the piston rod cavity control the perforation cylinder to move forwards and backwards. The invention provides the method for controlling the pin positioning accuracy by the seamless tube extruding locking pin process capable of improving the response speed of the perforation cylinder and the pin positioning accuracy for pecker locking and the inner surface quality of tubes.

The invention relates to a selection method for determining test stress corresponding to a test load during spring prestressing treatment. The selection method comprises the following steps: S1, selecting materials including selecting spring steel made of three materials, namely 60Si2MnA, 60Si2CrA and 60Si2CrVA; S2, calculating a test load including setting a test load as Fs and spring steel teststresses of different materials as tau s, and calculating according to a calculation formula (1) or a calculation formula (2), wherein the calculation formula (1) is calculated and determined according to 70% of the lower limit value of the tensile strength required by the design: tau s = 0.7 sigma b (1), or the calculation formula (2) is as follows: tau s is equal to 0.8 sigma s (2) according to80% of the yield strength required by the spring steel design; taking a larger value of results obtained in the calculation formula (1) and the calculation formula (2); calculating the test load according to a calculation formula (3); S3, carrying out prestressing treatment under the condition that the test stresses corresponding to the three materials of 60Si2MnA, 60Si2CrA and 60Si2CrVA are addedwith 5% of test load or the deformation of 3mm of the spring. Product reliability is improved.