41results about How to "Guaranteed Thickness Requirements" patented technology

The invention discloses a method for preparing a thin-type titanium or steel composite plate, and particularly relates to a method for preparing a composite plate manufactured by the titanium steel-based composite plate through explosion and pack rolling. The method is characterized in that in the preparation process of the thin-type titanium or steel composite plate, the titanium or steel composite plate is compounded and formed by the titanium plate and the steel plate through explosion, then two composite plates are folded and welded into a billet body, and then the thin-type titanium or steel composite plate is formed through rolling. The preparation method adopts the explosive composite process, the rolling billet body has high bonding strength after explosive compounding, the titanium or steel composite plate billet is folded and welded for rolling, and the deformation amount is in 4 to 7 times; therefore, the preparation method not only ensures higher bonding strength of the titanium or steel composite plate after rolling, but also ensures the respective thickness requirements, the prepared titanium or steel composite plate has good processing technological property, the explosive composite billets of the titanium plate and the steel plate after pack rolling have good bonding property, the bending test is performed without layering, the titanium plate surface is free from cracks and impurities, and the method has the advantages of higher bonding strength, corrosion resistance and fatigue resistance.

The invention discloses an electroplating manufacturing process, comprising the following steps of: A, utilizing a plasma degumming machine to carry out degumming treatment on residual resin in a back-drilled blind hole of a circuit board; B, carrying out primary copper deposition treatment on the back-drilled blind hole of the circuit board and then carrying out secondary copper deposition treatment to form a copper layer with the thickness of 0.3-0.5 microns in the back-drilled blind hole; and C, carrying out hole-filling electroplating on the circuit board to lead the thickness of the copper layer in the back-drilled blind hole to be more than 18 microns. According to the invention, by utilizing a plasma degumming way to treat the residual resin in the back-drilled blind hole of the circuit board, the problem that a chemical degumming speed is lower is solved, and the plasma degumming way has a good degumming effect and no residues; two times of copper deposition solve the problems that the thickness of deposited copper generated by the primary copper deposition is thin, and hollow copper depositing layers, broken copper or an open circuit is easy to generate in a process of storing or electrically pre-treating a board; and the thickness of the copper layer in the blind hole can reach to be more than 18 microns through the hole-filling electroplating, so that the thickness requirement of the back-drilled blind hole is met. Compared with the prior art, the electroplating manufacturing process provided by the invention effectively overcomes the quality defects that: the back-drilled blind hole cannot be completely degummed, the binding force is poor, and the copper in the hole is thinner and the like.

The present invention relates to a tea leaf tedding and processing system and a tea leaf tedding and processing method thereof. The tea leaf tedding and processing system comprises a bottom plate, four support columns, a supporting and fixing frame, a turning device, two positioning devices, a tedding device and two recycling devices; the upper end of the bottom plate is provided with the four support columns; the upper ends of the support columns are provided with the supporting and fixing frame; the middle part of the supporting and fixing frame is provided with the turning device; the two positioning devices are symmetrically arranged on the front and rear sides of the fixing and supporting frame; and the upper end of the turning device is provided with the tedding device. The tea leaftedding and processing system solves the following problems during tedding of tea leaves in the prior art: manual operations are usually used; the labor intensity of the manual tedding is high; the efficiency is low; the artificial tedding is uneven in thickness and cannot satisfy the thickness requirement of the tea leaves during the tedding of the tea leaves; besides, the tea leaves on the bottom layer are not easy to be turned over on the upper layer; the tea leaves on the bottom layer cannot be fully air-dried; the water loss rate of the tea leaves is affected; at the same time, the tea leaves are easy to fall during the tedding; the tea leaves cannot be collected automatically; the operation is complicated; the production efficiency is low; the stability is poor; and the tea leaves cannot be turned over automatically.

The invention discloses a machining method and device of a curved-surface workpiece. A shape follow-up tool and a fixing piece are utilized, one side of the shape follow-up tool is a horizontal plane,and the other side of the shape follow-up tool is a curved surface. The curved surface can be tightly attached to the first curved surface of the to-be-prepared curved-surface workpiece. The fixing piece comprises a bottom plate and a plurality of supporting parts arranged on the bottom plate. The bottom surface of the bottom plate is a horizontal plane. The arrangement positions and heights of all the supporting parts are different. The ends of the supporting parts are matched with the second curved surface to bear and fix the to-be-prepared curved-surface workpiece, and mutual matching of the curved-surface workpiece and the shape follow-up tool as well as the fixing piece is achieved. According to the machining method and device of the curved-surface workpiece, the machining difficultproblem of the curved-surface workpiece is solved through building of a datum plane and matching of the shape follow-up tool and the fixing piece.

The invention relates to a material distribution device, and belongs to the technical field of transportation devices. The material distribution device comprises a conveyor belt, wherein fixed bases are arranged on the two sides of a discharging end of the conveyor belt; a material distributing plate is arranged between the two fixed bases in a sliding manner; the material distributing plate comprises a first material distributing plate, a second material distributing plate, a third material distributing plate and a fourth material distributing plate sequentially arranged; a material distributing strip is also arranged between the two adjacent material distributing plates; the material distributing strip comprises a first material distributing strip, a second material distributing strip and a third material distributing strip; the first material distributing strip is arranged between the first material distributing plate and the second material distributing plate; the second material distributing strip is arranged between the second material distributing plate and the third material distributing plate; the third material distributing strip is arranged between the third material distributing plate and the fourth material distributing plate; a first groove in which the conveyor is put and a second groove in which the material distributing plate is put are formed in each of the material distributing plates; and an adjustment mechanism for adjusting a space between the adjacent material distributing plates is also arranged on the material distributing plates. According to the material distribution device disclosed by the invention, materials are distributed through the material distributing plates, so that the working efficiency can be improved.

The invention relates to a method for preparing a human body part model, in particular to a method for preparing a bionic hollow human body part model through 3D printing. The defects that a traditional casting and injection molding technology is long in model preparation time, high in cost and small in individual difference, and a medical model obtained through 3D printing cannot be applied to training such as surgical suture and repeated tearing are overcome. The method comprises the steps of data acquisition, data processing, model building, shell mold, hollow inner mold and assembly part mold preparation, mold treatment, mold assembly and retention, silica gel infusion, mold drawing and the like. The bionic hollow human body part model prepared through the method is real and is close to the real surface hardness of a target human body part, the surface is smooth and not sticky, the thickness and distribution of the model are consistent with those of the human body part, the tissuestructure is observed obviously, and repeated tearing is resisted. The method is suitable for surgical simulation, suture surgery training, clinical teaching and the like.

The invention discloses a preparation method of a titanium steel compound plate. The preparation method comprises the following steps of: firstly performing explosive welding on a titanium plate and asteel plate; and then hot-rolling the titanium plate and the steel plate to obtain the titanium steel compound plate. By performing explosive welding on the titanium plate and the steel plate, the bonding strength of a rolled blank after explosive compounding is high, and during hot rolling, the titanium/steel compound plate blank is heated and the rolling deformation is controlled at 4-7 times,so that the rolled titanium/steel compound plate has relatively high bonding strength and guarantees the thickness demands the titanium and steel.

The invention discloses a production method of a diffuser used in aerodynamic experiments and belongs to the technical field of design and production of high temperature and hypersonic velocity aerodynamic experiment equipment. The production method can effectively improve product quality and has fast assembly speed. The production method includes: processing flange parts with inner cylinder positioning steps and outer cylinder positioning steps on flange blanks, drilling positioning holes in outer cylinder blanks, making inner cylinder parts and outer cylinder parts through rolling, and assembling the inner cylinder parts and the outer cylinder parts on the basis of the inner cylinder positioning steps and the outer cylinder positioning steps. In addition, the thickness of cavities between the inner cylinder parts and the outer cylinder parts is controlled through a positioning short pipe so the purposes of improving product quality and assembling speed can be achieved.

The invention belongs to the field of design of inter-turbine casing support plates in axial-flow turbines, and relates to a design method of turbine support plate blades with supporting and flow guiding functions, the blade ring number and the blade height radius are given firstly, so that the positions and the pitch of the blades are determined, and then according to the supporting structure space needed by an engine, the flow guiding function is achieved. Determining centers and radiuses of small circles at the front and tail edges of the blade according to strength and processing technology requirements; an inlet upper wedge angle and an inlet lower wedge angle of the blade are arranged to ensure that the interior of the front half part of the blade has enough space, an effective air outlet angle and an outlet deflection angle are arranged to realize a flow guide effect on airflow, and an outlet wedge angle is arranged to ensure the thickness requirement of the rear half part of the blade; and then a suction surface control curve and a pressure surface control curve are respectively set to complete the design of the outer envelope line of the blade. According to the design, the blade profile integrates the design of the supporting plate and the guide blade, the front stage flow condition is better adapted, the pneumatic loss is lower, the total efficiency of turbine parts is improved, the axial size of the turbine stage is smaller, the number of components is smaller, the weight is light, and the cost is low.

The invention discloses a ceramic chip antenna. Metal circuits are attached to the outer surface of a ceramic base and a via hole formed in the ceramic base, the metal circuit positioned on the outersurface serves as a ceramic antenna body, the metal circuit positioned at the via hole serves as a circuit functioning in conduction, the metal circuits comprise a first metal circuit, a second metalcircuit, a third metal circuit, a fourth metal circuit and a fifth metal circuit, the first metal circuit is selected from high-temperature-resistant tungsten, molybdenum and platinum, the third metalcircuit is selected from copper, silver, chromium, iron and cobalt with high conductivity, the second metal circuit is arranged between the first metal circuit and the third metal circuit and used for transition, and the fourth metal circuit and the fifth metal circuit are arranged on an outer layer and used for protection and welding. As a plurality of metal circuits are designed, the ceramic base and the metal circuits can be subjected to a co-firing process to form the ceramic chip antenna, cost is controlled, metal materials with excellent conductivity can be adopted, and antenna performances are ensured.

The invention relates to a precision and performance control method for superplastic forming sudden-change wall thickness thin-wall hemisphere, and belongs to the technical field of titanium alloy superplastic forming. The method comprises the steps that 1, the size of a thin-wall hemisphere after a thin-wall blank is formed into the thin-wall hemisphere is determined; 2, a lower mold for forming the thin-wall hemisphere is designed; 3, an upper mold for forming the thin-wall hemisphere is designed; 4, polishing treatment is carried out on the inner molded surface of the lower mold and the inner molded surface of the upper mold; 5, the inner molded surface of the lower mold and the inner molded surface of the upper mold are evenly coated with welding stopping agents, and heating treatment is carried out; 6, the thin plate blank is placed on the top of the lower mold, and the upper mold covers the thin plate blank, and heating treatment is carried out; 7, reverse expansion treatment and forward expansion treatment are sequentially carried out on the thin plate blank, and the thin-wall hemisphere is formed; and 8, cooling is carried out, and the formed thin-wall hemisphere is taken out. The method can be used for forming titanium alloy hemispherical shell bodies with various sizes and large wall thickness distribution difference, and has good thickness distribution control and performance maintaining effects.

The invention discloses a structure and process for realizing WLCSP six-side plastic sealing of a TVS chip and is same as the routine WLCSP process. The process comprises steps that firstly, metal convex points are prepared at a front surface of a wafer; the wafer is cut to prepare a gap according to a final TVS product structure, depth of the gap is controlled during cutting, and the wafer can not be cut through; first plastic sealing is carried out from the front surface of the wafer, and the gap acquired through cutting is covered; wafer thinning is carried out from the front surface of the wafer, and an electrode is guaranteed to expose; if the electrode need be higher than a plastic sealing surface, the primary planting or coating process is carried out at the metal convex point portion; wafer thinning is carried out at a back surface of the wafer till size requirements of the final TVS product are satisfied; plastic sealing is carried out for the back surface of the wafer, and protection of the back surface of the wafer is accomplished; cutting is carried out along the center of the gap, through cutting is realized, and chip separation is accomplished. The method is advantaged in that the process flow is simple, process control requirements are not high, and thickness of finished products can be controlled for being quite thin.

The invention discloses a galvanized sinking roller, which is installed and arranged in a zinc pot and lower than the zinc liquid surface, and is used for coating a metal strip; the feature is that the extending direction of the metal strip above the sinking roller is also provided with roller shafts parallel to each other The stabilizing roll and the positioning roll; the metal strip extends from the zinc pot below the zinc liquid level and is at the lowest point at the sinking roll. After the metal strip contacts the sinking roll, it goes around the sinking roll and turns upward to extend and is placed on the stabilizing roll. Between the stabilizing roller and the positioning roller, there is no contact between the stabilizing roller and the positioning roller up and down, so that the metal belt can smoothly move between the stabilizing roller and the positioning roller without swinging; the surface of the sinking roller is covered with The circumferential single helix or double helix slag discharge groove. The invention has reasonable structure and stable operation, so that the surface of the obtained galvanized layer is uniform without marks and the quality is stable.