51results about How to "Overcoming Process Defects" patented technology

The invention provides a production method of a microporous copper foil, a microporous copper foil and a production device thereof. The production method comprises the following steps: taking a solution containing copper ions as an electrolyte, taking a prefabricated microporous cathode roll as a cathode, taking an anode cell as an anode, continuously electrolyzing depositing metal copper on the surface of the microporous cathode roll to form a microporous copper foil, wherein the microporous cathode roll is a cathode roll with a plurality of nonmetal dotted articles on a surface, contacting the electrolyte, of the cathode roll. The production device comprises a stander, wherein the stander is provided with the anode cell, the anode cell is connected with an anode of a power source by virtue of a copper bar, a cathode roll connected with a cathode of the power source is arranged above the anode cell, and the cathode roll is a microporous cathode roll. The microporous copper foil produced by adopting the production method is suitable for the smearing of a smearing machine, so that a cathode material is unlikely to drop; the microporous copper foil has advantages of being appropriate in thickness and not prone to deform and damage.

The invention relates to the manufacturing technology of SiC devices, in particular to a SiC etching method for gentle and smooth side wall morphology. The method includes the steps of cleaning SiC materials, depositing a loose mask layer, photoetching, carrying out dry etching on the mask layer, carrying out wet etching on a smooth mask layer, removing photoresist and carrying out dry etching on the SiC materials. The key process improvement refers to that dry etching on the loose mask layer and wet etching on the smooth mask layer are combined. According to the method, the process of only adopting wet etching on the mask layer is changed, and therefore the problem that the mask bar width is decreased due to lateral erosion in the wet etching is solved. By means of the method, the SiC etching morphology of gentle and smooth side walls can be obtained effectively and conveniently.

The invention discloses a semiconductor process, which comprises the following steps: a plasma containing the fluorine free radicals is used for etching a characteristic pattern on a rigid mask and in a layer below the rigid mask, and a gas which can react with the fluorine free radicals is used for carrying out the treatment to ensure that the residual fluorine free radicals react with the gas so as to form the fluorine-contained compounds for the purpose of removal, thereby preventing the fluorine free radicals from reacting with the titanium compositions with forming the particles deposited on a substrate, which results in the process defect.

The invention discloses a bamboo composite pipe connecting structure and a preparation method thereof and belongs to the technical field of bamboo composite pipe connection. One end of each bamboo composite pipe is set as a pipeline socket with a blocking platform and a sealing groove, and the pipeline sockets on the two corresponding to-be-connected bamboo composite pipes are set as cylindrical bundle sections, so that the pipeline sockets of the two bamboo composite pipes are inserted at the two ends of the bundle sections and corresponding connection of the two bamboo composite pipes is realized. The bamboo composite pipe connecting structure provided by the invention is simple in structure and convenient and rapid in preparation process; the process defect in the existing bamboo composite pipe connecting structure forming process can be effectively overcome; waste products of forming parts are reduced; waste of materials are reduced; the preparation cost and the application cost ofthe bamboo composite connecting structure can be saved; and good application prospect and promotion value are achieved.

The invention provides a method for welding a pull rod for a production line of cold expansion pipes, which comprises the following steps: preparing before welding; preparing a short joint end of the pull rod; preparing of a long joint end of the pull rod; welding; detecting after the welding, namely, carrying out ultrasonic and dye penetration inspection for the welded joint after the pull rod is welded. The method has the advantages that by adopting an unconventional method to weld and repair the pull rod for the production line of the cold expansion pipes, the method solves the technical problems of integral preheating of the pull rod, heat treating after the welding and welding at low temperature, avoids multiple technical defects, shortens repair time, and reduces loss of oil fields. The pull rod is a key component of production line equipment for the cold expansion pipes in the oil fields, and directly influences production operation after the pull rod is damaged, then the downtime loss is 320, 000 Yuan per hour, and if spare parts are bought abroad, several months are needed. The method generates certain social benefit and larger economic benefit, and provides scientific repair method for guiding production practice for projects in the same field.

The invention discloses an automatic wafer centering method, which comprises the following steps of: acquiring a wafer edge signal by a sensor in the process of taking back a wafer by a manipulator, obtaining the current center position of the wafer through an algorithm, comparing the current center position of the wafer with the teaching center position of the wafer, and compensating in the process of sending out the wafer next time by the manipulator if a deviation exists; and when the wafer gap just falls in one sensor detection area, rejecting the measurement result of the sensor in the gap area through an algorithm. According to the method, a machine table does not need to additionally increase stations, a mechanical arm can measure and compensate the wafer offset in the wafer conveying process, the equipment productivity is not affected at all, and the cost is far lower than that of a traditional mechanical centering unit and an optical centering unit.

The invention provides a direct dry-film adhering process for a hollowed-out region of a hollowed-out flexible circuit board. The direct dry-film adhering process is characterized by comprising the steps of: A, acquiring a semi-finished copper-clad flexible board; B, selecting a dry film with the thickness of a photosensitive emulsion layer greater than that of a cover film; C, heating double sides of the semi-finished copper-clad flexible board separately, and then adhering dry films on the double sides; D, allowing the semi-finished copper-clad flexible board adhered with the dry films to standby, pushing the semi-finished copper-clad flexible board into an oven for baking, and allowing the semi-finished copper-clad flexible board to standby after baking; E, aligning the semi-finished copper-clad flexible board obtained in the step D by using a film, wherein the exposed part of photosensitive emulsion completes polymerization and film hardening after being exposed to ultraviolet light, the unexposed part is developed to expose copper foil, the exposed copper foil is etched away and then the dry films of the film hardening part is removed to obtain the flexible circuit board. Thedirect dry-film adhering process eliminates the process defect that the hollowed-out flexible circuit board needs to print printing oil in the hollowed-out region and then be adhered with the dry films, reduces the cost, improves the production efficiency, and reduces the printing ink pollution.

The invention belongs to the technical field of civil engineering, and relates to a drilling and grouting construction method for a sand gravel stratum. The drilling and grouting construction method for the sand gravel stratum comprises the following steps that firstly, hole drilling is carried out, and pipe following drilling is conducted for downward feeding of a wall protection casing pipe; secondly, a grout pipe line is downwards fed; thirdly, an orifice blocking device is installed; fourthly, according to grouting procedures, a proper water cement ratio is adopted for grouting and grout proportioning changing till grouting completion; and fifthly, grouting construction is carried out. The drilling and grouting construction method for the sand gravel stratum has the beneficial effectsthat the problems caused when a perforated pipe enters the sand gravel stratum are solved; the setting depth is controllable, and compared with an inserting and beating method, the drilling and grouting construction method is easy to conduct; the problem that in the process of pulling out the casing pipe, the sand gravel stratum collapses, and consequently the perforated pipe is blocked is prevented, and the problem that slip casting cannot be effectively conducted in the sand gravel stratum is solved; the installation and operation difficulty of a stop-grouting plug is lowered; the effect onthe grouting diffusion radius is relatively small; the process defects are overcome, and the grouting quality is reliable; and the drilling and grouting construction method is suitable for any sand gravel stratum, can be implemented without process tests and has very obvious beneficial effects for a region where the stratum is complex.

The invention provides a preparation method of an aluminum alloy for an aerosol bottle cap. The method comprises the steps of S1, preparing a cast ingot through alloy components based on the mixing ratio; S2, milling the cast ingot; S3, uniformly thermally processing the cast ingot; S4, performing hot rolling on the cast iron to obtain a blank; S5, performing cold rolling to the blank which is subjected to hot rolling until the intermediate annealing thickness is reached; S6, washing the surface with weak alkali; S7, completely recrystallizing and annealing the middle; S8, performing pass rolling on a finished product; S9, stably chemically processing the finished product; and S10, stretching and bending and correcting back roll. According to the method, the Na content is effectively decreased based on the component mixing ratio and the technical method; the range of Na element which easily causes Na embrittlement in a high-magnesium alloy is avoided, and thus the problem of Na embrittlement is solved; and meanwhile, the component fluctuation is well controlled, and the problem that the magnesium element easily results to slag inclusion is solved; and meanwhile, the problem of liquid leaking caused by impurities adhering to the surface can be solved by a special weak alkali washing technology in the middle process; and the produced aluminum alloy for the aerosol bottle cap is high in stability in batch.

The invention discloses a method of using ozone and trace calcium peroxide to remove low-concentration ammonia nitrogen in water. The method comprises: adding 0.001-0.01 g/L of calcium peroxide into water; using a pure oxygen generator to make pure oxygen, placing the pure oxygen generator in an ozone generator, and using the pure oxygen from the pure oxygen generator as an oxygen source to the ozone generator, thereby producing ozone; introducing the water into an aerating tank and through the ozone generated by the ozone generator. The trace calcium peroxide can cooperate with the ozone so as to degrade ammonia nitrogen in water within a short time, the removal rate is up to 99%, the treatment time may shorten to 15 min, no secondary pollution is caused to the water, and the concentration of calcium peroxide may decrease to 0.001 g/L. The method herein is good in safety and reliability and very low in cost; the method helps evidently reduce the stink of black and odorous water and evidently increase the content of dissolved oxygen in the water.

The invention relates to the field of metal heat treatment, in particular to a water-based inorganic quenching medium. According to the water-based inorganic quenching medium, the raw materials are simple; preparation and quenching operation technologies are simple and convenient; the quenching cooling characteristic is more close to an ideal quenching medium; on the basis that quenching structureand performance of a low-hardenability material such as ordinary carbon steel and the like are satisfied, quenching stress of a workpiece with a complex shape is effectively lowered; and deformationand cracking of the workpiece are avoided.

The invention discloses a spiral milling actuator. The spiral milling actuator is characterized by comprising a base, a cutter, a feeding mechanism arranged on the base and used for driving the cutter to do feeding motion, a swinging mechanism arranged on the feeding mechanism and used for driving the cutter to do arc swinging, an eccentric adjusting mechanism used for controlling the radial offset distance of the cutter and and a rotating shaft driving mechanism; the eccentric adjusting mechanism comprises an inner eccentric sleeve, an inner shaft barrel connected with the inner eccentric sleeve through a sliding connecting piece, an outer eccentric sleeve arranged outside the inner eccentric sleeve and an outer shaft barrel fixed to the outer eccentric sleeve; the axes of the inner contours and the outer contours of the inner eccentric sleeve and the outer eccentric sleeve are designed in an offset mode; and the rotating shaft driving mechanism is used for driving the cutter to rotate and comprises a main shaft sleeve, an electric main shaft, an outer eccentric driving assembly for driving the outer shaft barrel to rotate and an inner eccentric driving assembly for driving the inner shaft barrel to rotate.

The invention provides a universal three-electrode conductance cell integrated forming die. The universal three-electrode conductance cell integrated forming die comprises a die body, a positioning and sealing plugs, glue filling grooves, positioning pin holes, connecting holes and controllable sliding blocks. The die body comprises two symmetrical die parts. The controllable sliding blocks are connected with the two die parts in a sliding mode respectively through bolts. Grooves are formed in the upper portions of the controllable sliding blocks. The positioning and sealing plugs are used for fixing a conductance cell tube. The positioning and sealing plug at one end is in the shape that the upper portion of the positioning and sealing plug is round and the lower portion of the positioning and sealing plug is square, is assembled at the groove formed in the corresponding controllable sliding block and is connected with the corresponding controllable sliding block in a matched mode. The positioning and sealing plug at the other end is cylindrical. The glue filling grooves are formed in the die body. The positioning pin holes are formed in the corresponding positions of the die parts. The connecting holes are formed in the two ends of each die part. An insertion groove is formed below the die parts. According to the universal three-electrode conductance cell integrated forming die, a conductance cell is integrally packaged, human factors are reduced, the packaging process is simplified, the packaging dimension is guaranteed, the manufacturing cycle is greatly shortened, and production efficiency is improved.

The invention provides a processing device and a processing method for a heating body. The method comprises: when manufacturing a heating body, firstly, adding molten metal into a slurry box, until aprinting surface of a segment of a conveyor belt being immersed in the molten metal, the segment of the conveyor belt contacting with a compaction roller, coaxially fixing a cylindrical heating film carrier on a printing shaft, then starting a driving device to make a driving roll rotate, the driving roll rotating to make the printing surface which is soaked by the molten metal move to the heatingfilm carrier and abut against the heating film carrier, the molten metal in a banded printing structure being adhered to the surface of the heating film carrier, to form a heating film band. Thus, aprocess defect in the prior art of first printing and then rolling is prevented, the heating film band can be reliably attached on the heating film carrier. The processing device for a heating body ishigh in automation degree, and can improve processing efficiency.

The invention discloses a mounting device for laminated beams of a main girder, and solves the technical problem of clearance leakage in connection of upper and lower laminated beams, which possibly causes joint gaping on the upper and the lower laminated beams. The mounting device comprises an upper laminated beam (1) arranged on a lower laminated beam (2), two left connecting frames are fixedly arranged at the left end of the upper laminated beam (1), two right connecting frames are fixedly arranged at the right end of the upper laminated beam (1), the other end of a left front frame girder (5) and the other end of a right front frame girder (6) are hinged together through a top connecting pin (9), the upper end of a front suspender (10) is connected to the front end of the top connecting pin (9), the upper end of a rear suspender (17) is connected to the rear end of the top connecting pin (9), a horizontal supporting beam (11) is connected between the front suspender (10) and the rear suspender (17), a jack (18) is arranged on the horizontal supporting beam (11), and the upper end of the jack (18) is connected to the lower bottom surface of the lower laminated beam (2) in a propping manner. The mounting device provided by the invention ensures entire quality of boiler installation.