117results about How to "Uniform roughness" patented technology

The invention relates to a processing method of high-pressure exterior cylinder component of million grade super critical steam turbine, especially to a processing method of S2099*P50 giant nonstandard trapezoidal thread. A processing method of giant nonstandard trapezoidal thread uses a numerically controlled machine to execute processing, which is carried out according to the following sequences: executing mathematics modeling to the screw thread type wire; using coarse and fine processing methods, determining suitable radius lathe cutters respectively adopted by the coarse and fine processing methods according to required processing wire and required surface accuracy and roughness concentration, and determining suitable deepness allowance of the line face after the coarse processing; determining the coarse processing lathe cutter center track area and the fine processing lathe cutter center track area, and modeling for the cutter center track boundary; determining spacing of every layer during processing and spacing of every cutter in a same layer according to the material to be cut, the selected cutter, machine performance and cutting position; programming the coarse and fine processing lathe cutter walking procedure; and executing the process according to the programmed procedure. The inventive processing method has high process efficiency and high machine precision.

The invention relates to a variable track-ultrasonic elliptic vibration type auxiliary consolidation abrasive polishing machine. The polishing machine comprises a power part, a polishing part, a transmitting part and an ultrasonic generator. The power part drives the transmitting part and the polishing part to move. The polishing part comprises a polishing workbench and a rotary polishing tool. The power part comprises power sources in X-axis, Y-axis and Z-axis directions. According to the polishing machine, machining efficiency and precision are high, complicated track movement is realized through a polishing disc, and the polishing speed is roughly the same, thus roughness of points of a polishing surface is basically the same; and meanwhile, the machining surfaces are not easy to damage, so that the polishing machine is suitably used for polishing hard and brittle materials.

In a method of manufacturing a shaft for the fluid dynamic bearing device, the shaft is formed with a plurality of grooves arranged in and around the external circumference, the surface of the grooves and external circumference with uniform roughness, and machined marks on the surface aligned in the circumferential direction, by controlling the relative vibration of a rod-shaped blank to be machined as the shaft for a fluid dynamic bearing and a grinding wheel (a machining tool) to grind the external circumference of the blank.

The invention provides a method for growing carbon nano tubes in situ on the surface of fiber. The method comprises the following steps: (1) pretreating the fiber, namely, treating the surface of the fiber by using a mixed liquid of concentrated sulfuric acid and hydrogen peroxide; (2) growing a catalyst in situ on the surface of the fiber; and (3) growing the carbon nano tubes on the surface of the fiber. As the fiber is pretreated by using the mixed liquid of concentrated sulfuric acid and hydrogen peroxide, the fiber surface which is relatively rough is provided, and the adhesion of the catalyst for preparing the carbon nano tubes is facilitated. Moreover, as the catalyst is uniformly adhered to the surface of the fiber by using a dipping method or a sol-gel method, the growth of the carbon nano tubes is facilitated. The dipping method or the sol-gel method is simple and feasible, easy to control, low in cost and beneficial for on-scale and in-batch production.

The number of electric discharge pulses is detected every given period. A deviation between the detected number and a target number of electric discharge pulses is obtained. Based on the obtained deviation, a correction value for the correction of a machining path in a direction normal to the machining path is calculated, whereby a corrected path is obtained. A wire electrode is moved relatively to a workpiece along the corrected path.

There are provided a printed circuit board and a method of manufacturing the same. The printed circuit board includes a first circuit pattern formed on a core substrate; an insulating layer stacked on the core substrate to cover the first circuit pattern and having a uniform surface roughness on a nano scale; a second circuit pattern formed on the insulating layer; and a via pattern electrically connecting the first circuit pattern to the second circuit pattern and penetrating through the insulating layer.

The invention provides a galling and dust blowing and sucking device for a coating of the inner wall of a pipeline. The device comprises a main pipe body, a walking mechanism, a galling device, a dustblowing pipe, a dust sucking pipe, a cleaning device and a main controller. The walking mechanism drives the galling device, the dust blowing pipe and the dust sucking pipe to move on the inner wallof the pipeline along the axis, a main rotary motor drives the galling device, the dust blowing pipe and the dust sucking pipe to move on the inner wall of the pipeline along the circumference, the inner wall of the pipeline is stably galled through the galling device, intense blowing airflow is generated by the dust blowing pipe, abrasive dust left after galling is completed is blown up, the abrasive dust is sucked through the dust sucking pipe, cleaning liquid is sprayed on cotton cloth a wiping cloth single unit through a liquid sprayer, the cotton cloth makes contact with the inner wall ofthe pipeline for wiping, the abrasive dust left after galling is completed is effectively removed, the cleanliness of a grinding surface is greatly improved, the surface with the uniform and stable roughness is obtained on the inner wall of the pipeline, adhesive force between two coatings is improved, the spraying effect is improved, and the corrosion resistance of the inner wall of the pipelineis improved.

The invention relates to a manufacturing process of a grinding roller, in particular to a manufacturing process of a superfine grinding roller, which includes the following steps: firstly a blank roller is processed according to roller graphical dimensions, then fine processing is performed on the blank roller, polishing processing is performed on the surface of a roller body after the fine processing is performed on the roller body, partial repair is performed on the surface of the roller body with air holes or pinholes, chromium plating, fine grinding and polishing are performed on the surface of the roller body, the roller surface is rolled repeatedly in reciprocating mode by using a rubber wheel containing sand to be molded, a certain number of superfine grinding rollers are molded through grinding, finally detection about roughness and gloss is performed on the roller surfaces of the manufactured superfine grinding rollers according to requirements to form quality inspection results. The manufacturing process of the superfine grinding roller changes a traditional manufacturing process of a grinding roller completely, the superfine grinding roller manufactured by the process is good in accuracy, long in service life and consistent in roughness, gloss and uniformity, and the superfine grinding roller cannot be manufactured by an original manufacturing process.

The invention provides a double-sided surface treatment method for a rolled copper foil, and two long wide surfaces of the rolled copper foil are sequentially subjected to the following treatments: electrolytic degreasing, alkaline chemical degreasing, washing 1, acid pickling, washing 2, roughening 1, washing 3, curing 1, washing 4, roughening 2, washing 5, curing 2, washing 6, blackening, washing 7, zinc electroplating, washing 8, chromium electroplating, washing 9, washing 10, silicone coupling agent coating and drying. In a corresponding electroplating solution, two long wide surface sidesof the rolled copper foil are equipped with anode plates, and the two long wide surfaces of the rolled copper foil are subjected to roughening 1, curing 1, roughening 2, curing 2, blackening, zinc electroplating and chromium electroplating. Double sides of the rolled copper foil have relatively high peel strength and relatively high roughness, and have good oxidization resistance, so that the double sides of the rolled copper foil can be pressed with PI films, and therefore, the problem that the original light surface and a coating layer cannot be bonded firmly is solved, and a micro-etchingprocess can be saved for downstream production enterprises.

A roughening treatment method for copper foil comprises: a stage A where an acidic solution containing sulfuric acid comprising at least one roughening additional substance as a heterocyclic compound having a chemical structure represented by the formula in each molecule and also having two or more cyclic structures is prepared as a treatment liquid for roughening treatment; and a stage B where one side or both the sides of copper foil are subjected to cathode treatment at the critical current density or higher using the acidic solution containing sulfuric acid, and projection-shaped copper electrodeposited material is formed on the surface of the copper foil. The invention provides a roughening treatment method where uniform roughened particles having no danger of falling can be obtained in a short time, the obtained roughened particles have low roughness and high adhesion with resin or the like, and productive efficiency is high even to thin copper foil, and to provide a treatment liquid used in the roughening treatment method for the copper foil.

The invention relates to a method for building a super-hydrophobic coating on a metal surface. The method comprises the steps that metal base materials are cleaned in a lye solution at 50-70 DEG C andan acid solution at 50-70 DEG C to remove grease on the surface; chemical etching treatment is carried out on the metal surface by using an aqueous hydrochloric acid solution at room temperature for5-15 minutes; and hydrophobic substance with low-surface-energy is assembled onto the metal surface after the chemical etching treatment, and then solidification treatment is carried out. According tothe method for building the super-hydrophobic coating on the metal surface, the super-hydrophobic coating is built on the metal surface, the used preparation method has no special restrictions on theshape of metal, and coating can be carried out on the surface of a test piece with complicated shape. The method does not require special equipment, has simple process, easy operation and mild condition, is especially suitable for metal parts with irregular shape such as heat exchanger fins, and is easy for industrialized mass production. After the gained coating is placed for a long period, preferable super-hydrophobic performance is still maintained.

The invention provides a method for preparing a ceramic bond stacking abrasive material through a centrifugal drying granulation technology. The method is characterized in that an abrasive material and ceramic bond powder composed of silicon oxide powder, aluminum oxide powder, lithium carbonate powder, sodium carbonate powder, boric acid powder and zirconium oxide powder are adopted as the raw materials, mixed slurry is obtained by adding deionized water and dextrin liquid into the raw materials, stacking abrasive material fresh pellets are obtained through centrifugal drying, and the ceramic bond stacking abrasive material can be obtained through calcination. The abrasive material can be evenly wrapped and high bonding force can be generated through the liquid phase formed after the powder bond in the stacking abrasive material is fused. The spherical stacking abrasive material prepared through the method has the characteristics of the uniform particle granularity and the uniform organization structure, and can be used for preparing abrasive cloth, abrasive belts and resin bond grinding wheels. The abrasive belts prepared from the ceramic bond stacking abrasive material have the characteristics of being high in grinding efficiency, good in self-sharpening performance and grinding heat dissipation and long in service life; automatic production can be easily achieved through the technology.

The invention belongs to the technical field of glass chemical etching, and particularly relates to an etching solution for preparing filter glass and a preparation method of the filter glass. The etching solution for preparing the filter glass is prepared from the following raw materials in percentage by mass: 5 to 10% of ammonium bifluoride, 4 to 6% of ammonium fluoride, 12 to 18% of sulfuric acid, 15 to 28% of hydrofluoric acid, 3 to 8% of phosphoric acid, 4 to 8% of copper sulfate, 0.5 to 0.8% of borax, 10 to 25% of cane sugar and 5 to 20% of water. The etching solution is used for treating glass, so that the filter glass meeting the use requirements of medical instruments can be prepared.

The invention provides a method for making a ceramic selenium drum development magnetic roller aluminum sleeve. The method is used for preventing oxidation of an adsorption layer on the surface of the aluminum sleeve, improving the abrasion resistance of the aluminum sleeve and improving the conductivity of the aluminum sleeve at the same time. The method comprises the following processes of: directly blasting sand to the surface of the aluminum sleeve to perform roughening treatment; and coating a chemically plated nickel-phosphorus alloy protective layer with the total thickness of less than 5 microns and a chemically plated ceramic and nickel-phosphorus alloy protective layer on the aluminum sleeve with a frosting layer. On the basis of keeping high particle fineness and uniformity of the adsorption layer on the surface of the aluminum sleeve, the service life of the aluminum sleeve can be greatly prolonged by the coated nickel-phosphorus alloy protective layer and the ceramic and nickel-phosphorus alloy protective layer; and meanwhile, because the chemically plated nickel-phosphorus alloy protective layer, the chemically plated ceramic and nickel-phosphorus alloy protective layer, the sand blasting method and the secondary zinc galvanizing technology are combined, the conductivity and the abrasion resistance of the adsorption layer on the surface of the aluminum sleeve are improved, the oxidation property of the adsorption layer is reduced, and various properties of common development magnetic rollers are obviously improved.

The invention discloses micro-etching liquid for a 5G high-frequency line production process, a micro-etching method and application of the micro-etching liquid and the micro-etching method, and relates to the technical field of printed circuit board production. The micro-etching liquid for the 5G high-frequency line production process is based on a sulfuric acid and hydrogen peroxide system and comprises a corrosion inhibitor, a brightener, a wetting agent, a stabilizer and a cosolvent, the cleaning agent comprises the following components in percentage by mass: 60-100g/L of sulfuric acid; 20-40 g/L of hydrogen peroxide; 0.1 to 1.5 percent of corrosion inhibitor; 0.1 to 1.5 percent of a brightening agent; 0.5%-3.5% of a wetting agent; 0.1 to 2.0 percent of a stabilizer; 0.5%-3.5% of a cosolvent; and the balance water. The micro-etching liquid disclosed by the invention has the advantages of long service life, high etching rate, stable and uniform coarsening degree of the etched copper surface and the like, can solve the problem of poor transmission signal after microetching in 5G high-frequency circuit board production, and meets the requirements of high transmission speed, low signal loss, strong copper surface binding force and the like.

The invention discloses a multifunctional aerobics pedal. The pedal comprises a box body, a spring is connected to the bottom surface of the box body through a screw, a bottom plate is connected to the lower end of the spring through a screw, the box body is internally provided with a motor, an output shaft of the motor is connected with a first rotating shaft through a coupling, and the upper endof the first rotating shaft is fixed to the top surface inside the box body through a first bearing pedestal; a driving gear is arranged on the first rotating shaft and meshed with a driven gear, a second rotating shaft concentrically matched with the driven gear is installed on the driven gear, the second rotating shaft is fixed to the top surface inside the box body through a second bearing pedestal, the upper end of the second rotating shaft vertically penetrates through the box body, and the pedal is connected to the upper end of the second rotating shaft. According to the device, the height of the whole body can be adjusted conveniently through a telescopic support rod, the driving gear is driven by the motor to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the pedal to rotate through the driving gear, and then a user can stamp different parts on the pedal, and it is guaranteed that the roughness of the surface of the pedal is uniform.