50results about How to "Ensure shape" patented technology

A method for correction of an optical proximity effect, comprising: parsing and dividing the periphery of a design pattern to obtain segments to process; for a segment having a corner comprising a segment side (101) and an adjacent side (102) forming a corner relation with the segment side, setting a target point according to the following principle: when the length of the adjacent side (102) is greater than a preset length, the target point is set at the location of the outer end point (104) of the segment side; when the length of the adjacent side (102) is less than or equal to the preset length, the target point is set between the vertex (103) of the corner and the outer end point (104) of the segment side, and the less the length of the adjacent side (102), the further the target point from the location of the outer end point (104); and adjusting, according to a simulation difference of the target point, the design pattern until it conforms to a design target.

The invention discloses a NM300 wear-resistant steel for a high-alumina high-silicon concrete mixer truck and a production method of the NM300 wear-resistant steel. Mass percentages of various elements in the steel and the carbon equivalent of the steel are controlled well. Molten iron subjected to desulfuration pretreatment enters a converter for smelting, and molten steel qualified after the smelting is continuously casted into a steel blank after LF+RH+calcium treatment; the steel blank is heated to be 1150-1300 DEG C in a soaking furnace or a heating furnace, and is rolled to be a middle blank through a roughing mill; the final rolling temperature of finish rolling is 820-920 DEG C, a steel plate with the thickness being 2.0-5.0 mm after the finish rolling is subjected to subsection cooling in a water cooling mode to be 100-300 DEG C, and the steel plate is rolled into a steel roll; the steel roll with the temperature being lower than 70 DEG C is subjected to cold rolling cover retreating tempering, wherein the cover retreating temperature is 150-300 DEG C, and the cover retreating heat-preservation time is 10-30 h; and the rolled steel plate is transversely cut and is straightened into a fixed length. According to the obtained abrasion-resisting steel plate, Rm is greater than or equal to 1000 MPa, A50 is greater than or equal to 8%, HBW is greater than or equal to 300 HBand the yield ratio is less than or equal to 0.75. The steel plate has good abrasion resistance and machinability, a production technology is simple, the steel plate can be used as a lightweight material of the concrete mixer truck, and the practical value is obvious.

The invention relates to a texturing roll rolling system and method of a UCMW tandem cold rolling mill. The texturing roll rolling system and method of the UCMW tandem cold rolling mill comprises a rolling mode identity module, a basic setting and calculation module, a texturing roll constant-rolling-force setting module, a No.5 rack reduction ratio setting module and a rolling control system, wherein the rolling mode identity module is used for judging a roll mode; the basic setting and calculation module is used for obtaining required rolling parameters from a reduction ratio constant table corresponding to the texturing roll mode; the texturing roll constant-rolling-force setting module is used for calculating rolling force in the texturing roll mode according to the type, the width and thickness specifications and the rolling speed of strip steel; the No.5 rack reduction ratio setting module is used for selecting No.5 rack reduction ratio from the reduction ratio constant table corresponding to the texturing roll mode according to the type and the width and thickness specifications of a set steel coil. The invention additionally relates to a method using the system. The rolling system and the method provided by the invention have the advantages that the rolling mill can realize stable rolling in the texturing roll mode, the shape and dimension accuracy of finished strip steel plates can be guaranteed and especially the surface quality of the strip steel can be guaranteed.

The invention discloses a lower spraying laminar flow cooling device. The device comprises a plurality of groups of lower spraying devices, wherein each group of lower spraying device comprises a collecting pipe, two plunger pipes, two plungers and two U-shaped covers; the collecting pipe is fixedly arranged along a direction vertical to the operation direction of strip steel; a plurality of goose neck spray pipes are uniformly distributed on the collecting pipe along the axial direction; the two plunger pipes are fixedly arranged above the two ends of the collecting pipe respectively, pass through the plurality of goose neck spray pipes which are uniformly distributed at the two ends of the collecting pipe respectively, divide the goose neck spray pipes into upper nozzles and lower spraypipes, and are communicated with the upper nozzles and the lower spray pipes of the goose neck spray pipes through a plurality of through holes; the two plungers are arranged in the two plunger pipesrespectively; the two U-shaped covers are covered outside the two plungers in a mode that openings are downward; and the plungers are connected with driving devices through the U-shaped covers, so that movement in the axial direction is realized, the through holes are blocked, and cooling water quantity is adjusted.

The invention relates to a laminar flow width-adjusting cooling device and a control method thereof. The laminar flow width-adjusting cooling device comprises a plurality of groups of spray pipe devices, and each group of spray pipe device comprises a collecting pipe, a screw rod and two pistons, wherein the middle part of the collecting pipe is provided with a water inlet pipe, and the collecting pipe is provided with a plurality of spray pipes which are evenly distributed; the screw rod is arranged in the center of the collecting pipe along the axial direction; and the two pistons are respectively arranged on the screw rod and can move in the collecting pipe along the length direction of the screw rod, and the external diameters of the pistons are matched with the internal diameter of the collecting pipe. According to the requirements of the cooling technique of the strip steel with different widths, the invention can be used for adjusting the area of cooling water along the width direction of a channel, thus reducing the temperature reduction of the side of the strip steel, and ensuring the uniformity of the profile shape, the mechanical performance, the temperature and the phase change of the strip steel along the width direction.

The invention relates to a laminar flow cooling upper spray blocking device which comprises a plurality of groups of lower spray devices, and each group of lower spray device comprises a collecting pipe, a plurality of spray pipes, at least one screw rod, two sliding blocks and two blocking plates, wherein the spray pipes are evenly distributed on the collecting pipes; the at least one screw rod is arranged at the upper part of the collecting pipe in a spanning way along the length direction of the collecting pipe; the two sliding blocks are provided with internal screw and are respectively connected with the screw rods by screw thread; the two blocking plates are respectively fixed with the sliding blocks, extend to an outlet of the collecting pipe; and the collecting pipe is movably shielded by a sliding mechanism. The laminar flow cooling upper spray blocking device can correspondingly build lower spray gap laminar flow corresponding to the width of a belt material channel according to the requirements of the cooling technique of the strip steel with different widths, and reduces the temperature reduction of the side of the strip steel by the corresponding change of a laminar flow cooling area along the width direction; and by adopting automatic lubrication, the device has the structure which is convenient for maintenance, and ensures the uniformity of the profile shape, the mechanical performance, the temperature and the phase change of the strip steel along the width direction.