95results about How to "Reduce grinding workload" patented technology

The invention relates to a lower alloy steel laser-electric arc hybrid welding method in the technical field of metallurgy, machinery, ships, automobiles, pipelines, petrochemical industry, marine equipment, pressure vessels, war industry and the like. In order to solve the problems existing in a traditional welding method, on the basis of the effect law of laser-electric arc coupling characteristics and laser-electric arc hybrid welding parameters, the welding parameters and the groove sizes of all welding joints of multilayer welding are optimized with the orthogonal design test method, and the researched and developed lower alloy steel laser-electric arc hybrid welding method has the advantages of being small in heat input amount, large in fusion depth, small in deformation and high in welding speed, capable of reducing the area of the welding joints, the width of the heat affected zone and the exhaust amount of harmful gas and smoke and favorable for improving welding quality and welding efficiency, lowering production cost, improving the quality of products and relieving environmental pollution. The method includes the processing steps that welding grooves are machined, the optimized welding parameters are adopted for all the welding joints of the multilayer welding, and lower alloy steel laser-electric arc hybrid welding is performed.

The invention provides a mineral separation process and system for an ultra-lean magnetite ore. The mineral separation process for the ultra-lean magnetite ore comprises the following steps of sequentially carrying out coarse crushing, intermediate crushing and fine crushing on a raw magnetite ore to obtain a fine-particle ore; carrying out dry magnetic separation on the fine-particle ore, and throwing tailings to obtain a dry concentrate; and carrying out wet grinding and separation on the dry concentrate. The dry pre-separation step is additionally arranged in the mineral separation process, so that the technical problems of high ore grinding and magnetic separation energy consumption, high cost, high mineral separation water consumption, tailing pond construction and the like are solved.

The invention discloses a casting technology of a wear-resistant and low-porosity steel casting. The casting technology takes silica sand, bentonite, an additive and water as molding materials, and comprises the steps of preparing a casting mould by mixing the molding materials; drying the prepared casting mould with hot air at the temperature of 130-140 DEG C; injecting the dissolved metallic solution into the casting mould, and pouring a semi-finished product; carrying out heat treatment on the semi-finished product, polishing and machining to obtain the finished product; checking and putting into a storage. After the casting technology is adopted, the wear resistance and the toughness of the casting are greatly improved, the pores in the casting are reduced, and the service life of the casting is prolonged; furthermore, the casting technology is simple in operation and low in cost.

The invention discloses a motor train unit aramid fiber honeycomb in-built part forming process. A panel is prepared from phenolic resin or cyanic acid prepreg; a middle core material is prepared from aramid fiber honeycomb; phenolic resin glass fiber foam felt is placed between the honeycomb and prepreg at corners; two layers of the prepreg are respectively paved on the upper and lower surfaces of the honeycomb; phenolic resin glass fibre foam felt is placed between the honeycomb and prepreg; blank combined by the materials is wrapped by an isolating membrane and then the wrapped blank is put onto a mould for press forming. The in-built part is light in quality, small in density and convenient to dismount, exchange and repair; the fireproofing and smoke prevention performance can reach the M1F1 grade of France NF16101, and accords with UIC564-2 standard; the production efficiency is improved greatly and the part size is accurate.

The invention discloses a cargo hold structure which comprises a bottom side tank inclined bottom plate (1), an inner bottom plate (2) and an inner bottom side stringer (3), wherein the lower portion of the inner bottom side stringer (3) is vertically supported. The inclined bottom plate (1) and the inner bottom plate (2) are connected through a board and by utilizing of a bent arc transition mode. The inner bottom side stringer (3) is supported below a knuckle line (7) formed by intersecting of extension planes of the inclined bottom plate (1) and the inner bottom plate (2). The cargo hold structure is especially suitable for an oil tanker cargo hold. A three-line centering and arc transition type connection structure of the bottom side tank inclined bottom plate and the inner bottom plate is mainly designed. According to the cargo hold structure, welding and polishing work load is effectively reduced. Fatigue resistance is effectively improved, at the same time, constructing and machining processes are simplified, work efficiency is improved, and the cargo hold structure has the advantages of being low in cost and high in strength.

The invention discloses a balance beam intelligent welding method based on a robot welding production line. An MES issues a production line production scheduling instruction; a balance beam is manually hung and conveyed to a feeding and blanking station; manual code scanning confirmation is performed; an RGV automatically conveys the balance beam to an MES specified welding station; a welding robot performs welding seam welding in the balance beam according to offline program; after the welding is completed, the balance beam is conveyed to the feeding and blanking station by the RGV; the balance beam is manually hung and conveyed to a repair welding station for repair welding; a support pipe and an upper wing plate are installed; the balance beam is manually hung and conveyed to the feeding and blanking station again; the manual code scanning confirmation is performed again; the RGV automatically conveys the balance beam to the MES specified welding station; the robot performs weldingseam welding outside the balance beam according to the offline program; after the welding is completed, the RGV conveys the balance beam to the feeding and blanking station; the balance beam is manually hung and conveyed to the repair welding station; sealing plates at two sides of the box body, an electric pipe and an anti-shearing block are installed; the balance beam is conveyed off the line; and the manual inspection is completed. The method has the advantages that the work intensity of workers is reduced; the welding quality of the balance beam and the management level in the production process are improved; and the construction environment is improved.

The invention discloses a connecting member for mounting of spring supports and hangers. The connecting member comprises a base and supporting frames, the supporting frames are symmetrically arranged on the base, the supporting frames and the base form a U-shaped groove, a threaded hole is formed in each supporting frame, the base is of a cuboid structure, a fixing hole is formed in each of four corners of the base, a zinc layer is plated on the surface of each supporting frame, the base and the supporting frames are made by a same material, and the material is composed of Cr, Mo, C, Co, Mn, P, S, Ni, Ti, W, V, Cu, Si, Nb, Ta, N, Mg, rare earth element and the rest Fe and unavoidable impurities. The invention further discloses a manufacturing method of the connecting member. The manufacturing method is simple and easy to implement, pollution-free in manufacturing process and low in manufacturing cost, and the connecting member manufactured by the method is resistant to corrosion and wear, high in strength and tenacity and long in service life.

The invention discloses a device and method for controlling a suspension welding seam root gap and welding deformation in a self-supporting mode. The device comprises a positioning block, upper rigid press blocks, a lower rigid press block and a forming groove. The positioning block comprises a positioning block body and a positioning part, wherein the positioning part penetrates through the seam root gap and is embedded in the forming groove. The upper rigid press blocks are symmetrically installed on the two sides of the positioning block body, the lower rigid press block is provided with provided with an inward-concave part matched with the forming groove, and the forming groove is formed in the inward-concave part. Magnets are installed in the upper rigid press blocks and the lower rigid press block. The invention further discloses the method with the device for controlling the suspension welding seam root gap and the welding deformation in the self-supporting mode used. The device for controlling the suspension welding seam root gap and the welding deformation in the self-supporting mode is convenient to use, low in cost and high in adaptation, the transverse retraction and staggered edges of a welding seam can be controlled, the welding deformation can be reduced, and it can be ensured that the back face of the welding seam is good in formation.

The invention relates to the steel casting industry, in particular to an optimized technology for manufacturing a water glass shell. The Be' of water glass ranges from 39 to 41, the modulus M of the water glass ranges from 3.1 to 3.4, and the density rho of the water glass ranges from 1.33 g/cm<3> to 1.368 g/cm<3>. A first face layer is formed by a mixture comprising 85% to 92% of 200-mesh quartz powder and 8% to 15% of 70-mesh-to-140-mesh quartz sand, the powder-liquid ratio n is 1.25 to 1.40:1, the viscosity measured through a phi6 flow cup ranges from 20 S to 60 S, the thickness of a coating ranges from 0.28 mm to 0.42 mm, and 40/70-mesh quartz sand is scattered. A second face layer is formed by 200-mesh quartz powder, the powder-liquid ratio n is 0.8 to 1.15:1, the viscosity measured through a phi6 flow cup ranges from 20 S to 60 S, the thickness of a coating ranges from 0.22 mm to 0.26 mm, 20/40-mesh quartz sand is scattered, and hardening is carried out through ammonium chloride. A transition layer is formed by mullite powder, the viscosity measured through a phi8 flow cup ranges from 8 S to 25 S, and 16/30-mesh mullite sand is scattered. Reinforcing layers are formed by 200-mesh mullite powder, the powder-liquid ratio n is 1.10 to 1.75:1, the viscosity, measured through a phi8 flow cup, of the first layer ranges from 30 S to 40 S, the viscosity, measured through the phi8 flow cup, of the second layer ranges from 50 S to 65 S, the viscosity, measured through the phi8 flow cup, of the third layer ranges from 70 S to 85 S, the viscosity, measured through the phi8 flow cup, of the fourth layer and the other layers ranges from 90 S to 120 S, 10/20-mesh mullite sand is scattered, and hardening is carried out through aluminum chloride. The manufactured shell can meet the requirements for cast fine steel castings.

The invention provides a cast-iron evaporative pattern coating and a preparation method thereof. The cast-iron evaporative pattern coating comprises 84 to 88 parts of high aluminum powder, 8 to 12 parts of perlite, 8 to 12 parts of sepiolite, 6 to 10 parts of styrene-acrylic emulsion, 2 to 3 parts of sodium bentonite, 2 to 5 parts of white latex, 0.1 to 0.4 part of carboxymethylcellulose, 0.2 to 0.6 part of additive, and 105 to 120 parts of water. The coating of the invention has the advantages of uniformity and smoothness and good air permeability, and is easy to overcome the problems that the casting is easy to spray back and the local carbon is deficient, and the strength is high under the high temperature condition, which can eliminate the sticky sand and the collapse of the casting surface.

The invention discloses an inlaying structure for a telecommunication base station filter cavity and a production method thereof. The inlaying structure comprises a mold body and an insert. A groove is formed in the middle of the mold body; a cooling water channel and at least one vertical cooling groove are formed in the mold body; the vertical cooling grooves are both located in the bottom of the groove; the shape and size of the groove are the same as those of the insert; the depth of the groove is equal to or smaller than the height of the insert; and vertical cooling grooves are formed in the insert. When the insert is mounted in the groove of the mold body, the vertical cooling grooves of the mold body and the vertical cooling grooves of the insert are matched and in correspondence in the vertical direction. During using of the inlaying device, when products are remodeled or improved or when casting points on the surface of the filter cavity are worsened and influence the grinding process to be not capable of bearing any more, the surface quality can be improved quickly only by changing an insert prepared in advance, and the grinding workload is reduced. The inlaying structure can effectively save the production cost while guaranteeing the forming quality.

The invention relates to a technology for thickening the pipe end of a drill pipe, an oil pipe and a sleeve used for oil and natural gas drilling, in particular to a method for thickening the pipe end of the drill pipe. The conicity and the length of a pipe end external thickening transitional section and an external thickening section are molded by mould control. The conicity and the length of an internal thickening transitional section are molded freely by the upset forging of a punching head. The technology is characterized in that each pass Meu during the process is shortened gradually, and the conicity is increased gradually. The invention mainly solves the technical problem in the multi-pass thickening technology by a drill pipe internal-external thickening method that the start point of the internal thickening transitional section of a first thickening pass always has concave pits and embossments. The invention improves the smooth transitional shape of an internal thickening transitional zone and ensures that the round angle diameter at the position of a thickening zone disappearing point is more than 300mm, and the invention reduces the workload for grinding and improves the thickening quality.

The invention discloses a centrifugal casting method of coated sand shell type cast steel. The centrifugal casting method of the coated sand shell type cast steel comprises the following steps that high-strength coated sand is manufactured, coated sand raw sand is refined, silicon content of the raw sand is required to be more than or equal to 99.6%, and the raw sand is scrubbed and dried by tertiary water; shell-type is fixed to a centrifugal rotating table, and the coated sand shell type is fixed to the centrifugal rotating table; molten steel is smelted; rotating is started, molten steel pouring is carried out; the rotating is stopped, and parts are taken out. According to the centrifugal casting method of the coated sand shell type cast steel, the production rate can reach 95%, and thequalified rate of product leakage detection can reach more than 98%. Compared with an original coated sand shell type process, smelting power consumption of 52.6% can be saved, smelting alloy consumption is reduced by 30%, two welt risers can be omitted in per product, the cutting is reduced, and polishing workload can reach 80%.

The invention relates to the technical field of casting forming and casting, in particular to an evaporative pattern casting burned shell type casting process. The process comprises the primary process flows of molding, riser and pouring gate adhering, coating, drying, burning, box burying, pouring, cleaning, polishing and machining. A casting produced by the casting process has the advantages ofbeing high in surface smoothness, high dimensional precision and the like, and the evaporative pattern casting burned shell type casting process not only can meet the demand on precision of the casting, but also can lower the production cost and reduce the production pollution greatly, can meet the demand on top-grade precise casting of complex structure, and is green and environment-friendly in shell manufacturing process.

The invention discloses a method for coating retention around door and window open holes of a large ship superstructure. The method comprises the steps that after ship block structures are completed,positions and areas needing to be subjected to coating retention are determined at the door and window open holes of the ship superstructure; adhesive tape paper is pasted to the positions and areas needing to be subjected to coating retention; ship blocks are coated; and the adhesive tape paper is torn off, and the positions and areas needing to be subjected to coating retention are protected byworkshop primer. The labor cost is effectively lowered, and the construction period is shortened.

The invention relates to the technical field of grinding and polishing, and particularly discloses a laser scanning grinding system. The laser scanning grinding system comprises a laser scanning grinding device, a rotary workbench device and a control device. The laser scanning grinding device and the rotary workbench device are both connected with the control device. The laser scanning grinding device comprises a robot rotary base and a grinding mechanism arranged on the robot rotary base. A first laser scanning transmitting device, a second laser scanning transmitting device and a laser receiving device are arranged on the side, facing the rotary workbench device, of the robot rotary base. The laser receiving device is located between the first laser scanning transmitting device and thesecond laser scanning transmitting device. The rotary workbench device comprises a rotary workbench. The rotary workbench is used for fixing multiple to-be-ground parts and is provided with a third laser scanning transmitting device. The invention further discloses a laser scanning grinding method. The laser scanning grinding system has the advantage of precise grinding.

The invention discloses anti-sulfurizing coating and belongs to the technical field of coating design. The anti-sulfurizing coating is composed of following components of, by mass, 100% of zircon powder, 0.2% of vegetable glue, 1% of modified clay, 1.6% of bakelite, 26% of water, 0.1% of a dispersing agent, 0.03% of a surface active agent, 0.3% of a thickening agent, 0.3% of a penetrant, 0.08% of a defoaming agent, 0.2% of a preservative and an anti-sulfurizing agent. The anti-sulfurizing coating disclosed by the invention is low in production cost, high in operability, reliable in performance and remarkable in anti-sulfurizing effect and crack prevention effect, and the workloads of cleaning, soldering and polishing are greatly lowered.