117results about How to "Guaranteed wall thickness" patented technology

The invention discloses a wax injection mold for investment casting of hollow turbine blades and a method for rapidly and accurately manufacturing the wax injection mold. The mold consists of a cavity mold, a mold core and an accessory structure, wherein the cavity mold comprises an upper mold and a lower mold of a combined structure; each mold block forming the cavity mold consists of an external aluminum mold frame, an internal cast zinc alloy inlay and a conformal cooling copper pipe embedded into the inlay; a mold core positioning piece which can be decomposed at a high temperature is arranged on a longitudinal rib of the mold core; and water-soluble core blocks used for forming exhaust openings in the rear edges of the turbine blades are arranged on rear edge ribs of the mold core. The matching precision of the mold core positioning piece and the cavity mold is guaranteed by adopting a cavity mold interior running-in method, and the matching precision of the water-soluble core blocks and the cavity mold is guaranteed by adopting a cavity mold interior adhesion method. The wax injection mold disclosed by the invention is low in manufacturing cost and short in period, and the high wax pattern precision and core positioning precision can be obtained.

The invention relates to a casting method for casting the three-way ventilate branch tube of thin-wall iron element, which comprises: (1), using the curvature formed by the central line of C exhaust open and the central line of A exhaust tube, to make the C and A exhaust opens above the parting surface, to be shaped via upper and lower outer moulds; the tube core and sand core are put via the serial number, and it uses pour system that combines side pour and bottom pour with contract cap and cold iron; (2), preparing outer mould, core box, section sheet, pour cap, and the wood mould that checking sample plate; (3), preparing the casting element and sand core; (4), drying the casting element and the sand core, and closing the tank after arranging the sand core; (5), smelting and pouring; (6), cooling and molding; (7), cleaning the casting element; (8), thermally treating; (9), testing the water pressure. The invention can improve the quality of casting element, and improve the producing efficiency.

The invention discloses the rolling technology of a double-stander oblique hot rolling small diameter seamless steel tube, and the rolling technology of the invention is that a mandrel trolley pushes a mandrel into a pierced billet and is pushed to move forward, the mandrel is heated to 950 DEG C to 1150 DEG C by an intermediate frequency induction heating electric furnace, the mandrel trolley continues to pushes the heating pierced billet into a rolling mill to carry out wall increasing and diameter reducing rolling, only the mandrel and a roller are cooled during rolling process; the pierced billet that breaks away from the mandrel is placed into a reheating electric furnace for heating to 950 DEG C to 1150 DEG C and is sent into a stretch reducing and wall increasing rolling mill to carries out the diameter reducing rolling, the heating while rolling can be realized, and only the roller is cooled during the rolling process; the invention is finished by cooling, straightening, cutting and online detecting after rolling. The invention realizes the technology of heating the mandrel and the roller while rolling and cooling by improving the heating method of a heating furnace, structure and the cooling method of the mandrel and the roller. The rolling technology of a double-stander oblique hot rolling small diameter seamless steel tub improves efficiency, simplifies the technology, reduces cost, saves energy and reduces pollution, thus the rolled steel tube is high in precision.

The invention discloses a plunger type motor pump, and belongs to a plunger pump. The problems of weak strength and low overall power density of a cylinder of the conventional plunger motor pump are solved. According to the plunger type motor pump, a motor stator is assembled in a housing. The two ends of the cylinder are supported in the centers of a left end cover and a right end cover respectively. A motor rotor is sleeved on and fixedly connected with a lug boss on the middle part of the cylinder. N plunger cavities are reserved in each of the left and right end faces of the lug boss of the cylinder. A plunger piston shoe component is arranged in each plunger cavity. Suction and forcing valve components are arranged in correspondence to each plunger piston shoe component on the lug boss of the cylinder. A left swash plate is fixed on the inner side of the left end cover, and a right swash plate is fixed on the inner side of the right end cover. The plate surfaces of the left and right swash plates are parallel. Every two coaxial plunger piston shoe components are pressed against each other through a support rod, and piston shoe heads at the two ends are pressed on the plate surfaces of the left and right swash plates respectively. Reverse thrust generated between the plunger piston shoe components at the two ends and the swash plates and hydraulic acting force in the cylinder are transmitted through the support rods, and internal reacting force is fully utilized, so that the number of the parts is decreased, the overall strength of the pump is strengthened, and the internal space utilization rate of the cylinder is increased.

The invention relates to a U-shaped precast concrete shell with inner ribs, which is mainly used for manufacturing a reinforced concrete beam. A hoping and a protective layer of the reinforced concrete beam are manufactured into a precast U-shaped shell which is not only used as a construction plank of the reinforced concrete beam, but also used as part of the structure to participate the joint work so as to be beneficial to saving a great amount of construction templates and workload thereof, improving the construction efficiency, lightening the labor force, realizing the cross operation, decreasing the construction cost, ensuring the building quality, saving resources and energy sources, protecting the environment and promoting the industrialized building development. The manufacture method of the U-shaped precast concrete shell adopts a rapid molding method, not only has simple manufacture and thin wall, but also can ensure the precast shell can be reliably bond and jointly work with post-cast core concrete by the inner ribs of the shell. In addition, the manufacture method of the U-shaped precast concrete shell can satisfy the thin-wall requirements and ensures that the protective layer thickness of the reinforced concrete beam main rib is the protective layer thickness of standard specifications.

The invention discloses a mold for inflating, filling and forming of a full-dry optical-cable loose tube. The mold comprises a plastic extruding mold, a fiber guide tube, an inflating support and an air source mechanism, wherein the inflating support sleeves the fiber guide tube so as to form a sealed cavity, and air guide holes and an air inlet are dissymmetrically formed in the fiber guide tube and the inflating support; filtration and graded depressurization are performed twice on compressed air when the compressed air sequentially passes through a filter device and a pressure regulating device, the depressurized air enters the fiber guide tube through the air guide holes, the air, water blocking yarn and optical fibers are uniformly and stably injected in a formed loose tube through the fiber guide tube so as to form a full-dry optical-fiber loose tube through plastic extruding. The mold disclosed by the invention is simple in structure, the after shrinkage of the loose tube is small, and the fiber excess length is stable and controllable.

The present invention provides a suspension arm made of an aluminum alloy extruded profile having a portion forming a bottom portion (43), portions forming at least two vertical walls (41, 42), and a horizontal rib (44) which connects the two vertical walls, wherein a suspension part lower end support portion is formed between the two vertical walls or at the bottom portion by removing a part of the horizontal rib. It is preferable to gradually change the interval between the two vertical walls in the portion in which the horizontal rib is removed.

The invention relates to a casting technique, in particular to a casting technique for bracket casting of a marine pod-type electric propulsion system, characterized by comprising the following steps of: designing a three-dimensional technique, performing analog simulation conformation on the casting technique, manufacturing a mould and a sand box tool set, horizontally configuring, manufacturinga core, assembling the core and closing the box, pouring, cooling and opening the box. The casting technique provided by the invention has the advantages of improving the casting cleanness, reducing the shrinkage defects, meeting a wall thickness demand, satisfying UT and MT flaw detection demands, reducing the production cost, and realizing safe production and excellent batch production of bracket casting.

The feed forward control method for wall thickness of tension reducing machine includes the following steps: 1. reading out the ideal correlated technological parameter data of the steel pipe to be rolled and on-line measuring its practical correlated technological parameter data; 2. real-time on-line calculating the wall thickness of continuously rolled pipe and calculating the error; 3. regulating the roller rotation speed based on the expression I for reaching ideal thickness in the case of the error within the required range; and 4. calculating the roller rotation speed correcting amount based on expression II before returning to the step 3 in the case of the error beyond the required range. The present invention utilizes the on-line data of hot rolling process in regulating the rolling rotation speed distribution of rollers adaptively to raise the rolled pipe product wall thickness precision.

The invention discloses a mould for building a spherical or cylindrical cellar and a method for building the cellar by the adoption of the mould. The mould comprises an air bag and an inflation and deflation device fixed on the air bag, wherein the air bag (1) is designed to be spherical or cylindrical and is made of one layer of soft material, a bag cap (1.4) is connected with the top end of the air bag (1), and the inflation and deflation device (2) is arranged on the bag cap (1.4) and is composed of an inflation and deflation pipe (3), an intercalated disc (4) fixed to the lower section of the inflation and deflation pipe (3) and a valve (5) arranged on the inflation and deflation pipe (3). The mould is simple in structure, low in production cost and stable and reliable in construction, and the construction method is simple, easy to operate, and high in construction efficiency.

The invention discloses a method for packing an alkali metal simple substance, which is applied to the technical field of alkali metal atom steam reaction chambers. The method is characterized by comprising the following steps of: making a paraffin seal molding die; coating a paraffin layer on a bottom die; processing a micro blind hole array on the paraffin layer by using a male die or laser light; injecting a liquid-state alkali metal simple substance into the micro blind hole array on the paraffin layer by using a micro sample injection device; coating a layer of paraffin on a step layer of a top die; aligning the top die to the bottom die along a step groove and laminating; uniformly heating the laminated top die and bottom die till the paraffin layer at the joint of the top die and the bottom die is in molten or critical molten state; removing silicon from the buckled top die and bottom die by corroding with a potassium hydroxide solution to obtain a paraffin bag array; and separating to obtain a paraffin bag coated with micro alkali metal simple substances. Alkali metal is rubidium (Rb) or caesium (Cs). The invention has the advantages of capabilities of preventing the alkali metal simple substance from being deteriorated and reducing impurities in an atom steam chamber, convenience for batch manufacturing, simple process, easiness for integration with a next stage system, and the like.

The invention discloses a tool holder for grooving a cutting blade. The tool holder comprises a tool holder body and a fastener, a clamping portion of the tool holder body consists of an upper clamping portion and a lower supporting portion, an upper positioning surface of the upper clamping portion and a lower positioning surface of the lower supporting portion enclose a blade clamping groove, a rear supporting surface and an elastic extending section are arranged at the rear end of the blade clamping groove, the elastic extending section extends backwards to the neck of the tool holder body, the fastener penetrates through the upper portion and the lower portion of the elastic extending section, M discontinuous upper positioning tables are arranged on the upper positioning surface, and N discontinuous lower positioning tables are arranged on the lower positioning surface, wherein 2<=M<=6, and 2<=N<=6. The tool holder for grooving the cutting blade has the advantages that positioning positions and angles can be automatically adjusted, plastic deformation of the tool body can be effectively suppressed, and the tool holder is stable in structure and long in service life.

The invention relates to an adjusting device for the wall thickness of cold drawn precision steel pipes, comprising an external mold and a core mold, wherein, the external mold provided with the core mold is arranged on an intermediate stand post of a drawbench. The invention is characterized in that: a working tape of the external mold is provided with a small cone angle of 2-4 DEG C; the core mold is connected with one end of a tie, the other end of which is connected with a screw; a leptospira is sleeved on the outside of the screw; the external surface of the leptospira is provided with a tooth and connected with an AC servo motor through a gear and a speed reducer. The invention can drive the tie which is connected with the core mold and a spiral breadth on the tail of the tie through the AC servo motor according to DEG C of wear of moulds; the influence of the wear of a compensation mould on the deviation of the wall thickness of the steel pipes is achieved by adjusting the relative positions of the external mold and the core mold on the axle wire, thereby the problem that the wall thickness of the steel pipes is made to be changed due to the wear of the moulds when the cold drawn precision steel pipes are used.

The invention relates to a knuckle bearing structure. The knuckle bearing structure comprises an outer ring with a pulling rod, wherein the outer ring is internally provided with an inner ring. The knuckle bearing structure is characterized in that the inner sides of the two ends of the outer ring are respectively provided with a gap; the length of the gap corresponds to the outer diameter of the inner ring; the width of the gap corresponds to the thickness of the inner ring; the inner ring is placed in the outer ring by the gaps; and the outer ring and the inner ring form matched spherical-surface contact. The knuckle bearing structure has the advantages that the inner sides of the two ends of the outer ring are respectively provided with the gap, the length of the gap corresponds to the outer diameter of the inner ring, the width of the gap corresponds to the thickness of the inner ring, the inner ring is horizontally placed in the gaps and is placed into the outer ring by rotation, and the outer ring and the inner ring form matched spherical-surface contact, and since the inner ring is placed into the outer ring by rotation, the separation of the inner ring and the outer ring is conveniently realized, the convenient replacement of the inner ring or the outer ring is realized and the production cost is effectively reduced.

The invention relates to a combined pump barrel small-diameter oil well pump. The combined pump barrel small-diameter oil well pump comprises a pump barrel assembly, a plunger assembly and an oil inlet valve assembly, an upper cover, a closed oil outlet valve cover, a traveling valve ball, a traveling valve seat and a plunger centering device are arranged in an oil pipe nipple, the upper cover is in threaded connection with the closed oil outlet valve cover, the traveling valve ball and the traveling valve seat are arranged in the closed oil outlet valve cover, the closed oil outlet valve cover is a quincuncial oil outlet hole structure with guide ribs, the upper end portion of the oil pipe nipple is connected with an oil pipe coupling, the lower end of the oil pipe nipple is connected with an upper pump barrel coupling, a hollow plunger is connected to the lower end of a traveling valve assembly, and a rectangular balance groove is formed in the lower portion of the hollow plunger; the upper end of the upper pump barrel is connected with the upper pump barrel coupling, the lower end is in threaded connection with a lower pump barrel, and the inner diameter of the lower pump barrel is 1mm larger than the diameter of the upper pump barrel; the lower pump barrel is connected with a lower pump barrel coupling. The combined pump barrel small-diameter oil well pump has the advantages that the interstitial leakage of the oil well pump can be reduced and the degree of wear between the pump barrel and the plunger is reduced.

The invention provides a spinning method for a bottle neck part of an electrically conductive contact finger. The spinning method is characterized in that while radial force is applied to a cylinder-shaped blank of the electrically conductive contact finger in the spinning process, axial pressure is applied to the cylinder-shaped blank of the electrically conductive contact finger in the axial direction of a core mold by utilizing a pressure loading mechanism, so that once the bottle neck part of the electrically conductive contact finger is stretched to be thinned under the action of the radial pressure of a spinning wheel, the axial pressure applied to the cylinder-shaped blank of the electrically conductive contact finger can push material to flow towards the thinned part of the bottle neck part in real time to timely supplement the stretched part, thereby preventing the bottle neck part of the electrically conductive contact finger from being stretched to be thinned. The spinning technology is simple to operate, is very convenient to implement and effectively guarantees the wall thickness of the bottle neck part of the electrically conductive contact finger in the spinning process, thereby guaranteeing that the electrically conductive contact finger manufactured by adopting the spinning technology has high flow capacity and satisfies the requirement of a megavolt power transmission and transformation line for an effective area of a through-flow cross section of the electrically conductive contact finger of a bypass isolating switch, and laying a solid foundation for smooth passing of 6300A of current.

The invention discloses an abnormal wall integral anchor-pouring anchor rod, which comprises a steel pipe body drilled with eyelets, wherein an exposed section of the steel pipe body is processed with screw threads, and the wall thickness of the end of the exposed section of the steel pipe body is enlarged so that the steel pipe body becomes an abnormal wall steel pipe; the front end of the steel pipe is processed into a braided shape and is used as the anchoring end; and a reducing part of the steel pipe body is in a convex ring shape. The anchor rod has the advantages that the front end of the steel pipe is provided with the anchoring end to play a role of the anchor rod and prevent the abnormal wall steel pipe from rushing out of a bore hole in the process of slip casting; the exposed section of the steel pipe is processed with the screw threads after the wall thickness thereof is enlarged so as to ensure the effective wall thickness of the exposed section of a slip-casting anchor rod and enhance the tensile strength thereof so that the abnormal wall steel pipe plays the role of the anchor rod and plays the role of the slip casting; the wall thickness of the externally exposed end, and the tensile strength is enhanced, thus the anchoring force is improved; and because a convex ring at the reducing part plays a role of a check ring, a stop-grouting plug has good leak tightness, and slurry is not thrown up in the slip casting.

The invention relates to the field of steel pipe production, in particular to a plug for punching of large-hole series medium- and thick-wall capillaries. The outline of the plug consists of a punching section, an expanding section, a rolling section, a circling section and a reverse cone section. The front end surface of the plug adopts a flat head design, and a bar inserting hole is formed on the tail end of the plug; connection between the front end surface of the plug and the punching section is realized through arc transition, wherein the arc radius is R2, and the arc radius of the outline of the punching section is R3; the expanding section and the rolling section are cones, wherein the taper of the expanding section is a2, and the taper of the rolling section is a1; the outline of the reverse cone section is an arc of which the arc radius is R1; and the circling section is a cylinder.