75 results about "Roughcast" patented technology

The invention relates to a large-scale high-temperature alloy blank casting method capable of controlling the casting size, and belongs to the technical field of high-temperature alloy casting. Measuring a temperature curve of the sand mold after the high-temperature alloy is poured; a process model is created, simulation software is used for carrying out stress deformation simulation, a part model of the casting is created, the simulation result of the part model and the simulation result of the process model are compared, the reduced scale, correction and the machining amount are adjusted in real time, and the process model is obtained; manufacturing a process pattern according to the process model, and producing a sand mold by utilizing the process pattern; creating a sand core model, inputting sand mold temperature curve parameters into simulation software, carrying out sand core deformation stress simulation, measuring sand core deformation stress, and manufacturing a core box according to the sand core model; a core bar is manufactured according to the design, the manufactured core bar is placed in a core box, and a sand core is manufactured; demolding the sand core; combining the sand core with the sand mold to obtain a casting cavity; and molten steel is poured into a casting cavity, and a casting blank is formed after cooling and solidification.

The invention relates to a natural building material panel consisting of individual blanks made of clay and loam, which are arranged seamlessly and offset and are connected by force. Since the individual components (blanks) are already dry, the panel production process is not subject to drying shrinkage, and the final panel can be as large as an entire wall. The overlaps and the fully bonded paper reinforcements on the top and bottom surfaces, as well as between the layers, provide sufficient reinforcement to withstand flexural loads. The internal reinforcements are temporarily protected by the resting blanks in case of fire or water, thus keeping the plate dimensionally stable for longer.

The invention provides a high-pressure casting process of a bearing retainer, which comprises the following steps of: 1, carrying out high-pressure casting by adopting a cold chamber die casting machine to prepare a retainer blank, spraying a release agent on a mold cavity in advance, closing a mold, and applying high-pressure mold locking through a mold locking mechanism; 2, pushing the injection punch in two stages: pushing the molten metal at a low speed, switching to high-speed filling when approaching a cavity, and then instantaneously pressurizing to compensate shrinkage; thirdly, after the casting is rapidly solidified in the mold, mold opening and ejection are conducted, and the fixed mold face and the movable mold face of the mold are designed in a non-inclination mode; fourthly, the blank is subjected to sand blasting treatment so as to improve the surface quality; fifthly, pollutants on the surface of the blank are removed through a cleaning machine; and sixthly, machining and quality detection are conducted on the blank piece. Two-stage injection control is combined with instantaneous pressurization and pressure maintaining, so that the problem that local part of molten metal is not filled or the surface quality is poor in the traditional casting process is solved, and the defects of incomplete mold filling and air holes caused by air holes or oxide inclusions are overcome.

A method includes: forming a blank by cutting a plated steel sheet having a plating layer formed on at least one surface of a base material; and heating the blank in a heating furnace, wherein the heating of the blank includes: a multistage heating operation of heating the blank in stages; and a soaking operation of soaking the blank, in a temperature of Ac1 to 910° C., and a temperature an in the soaking operation and a total heating time bn in the heating of the blank satisfy6⁢2≤91.81+K-0.0⁢22×an-0.23×bn(K: a material correction coefficient.)

The invention relates to the field of fracture prevention of 3D printing sand cores, in particular to a method for preventing a superfine 3D printing sand core from being fractured. In order to solve the problems that in the prior art, the strength is increased in the mode that a core bar penetrates through a sand core, but a gap between the core bar and the sand core cannot be effectively eliminated, and the fracture trend of the 3D printing sand core is increased, the invention provides the anti-fracture method for the superfine 3D printing sand core. The special core bar has the following beneficial effects in the aspect of solving the problem of breakage of a sand core with a superfine structure: after a casting is knocked out, the core bar is naturally separated and can be recycled and reused; the core bar blank is convenient to obtain and simple to process, and the cost is effectively saved. The special core bar is high in practicability, and sand cores with similar structures can be flexibly adjusted and used; bonding agents are filled inside and outside the special core bar to be seamlessly connected with the sand core, and the strength of the sand core is improved through overall hardening.

A kind of mining bimetallic sprocket and manufacturing method, including the following steps, using three fire forging forming mode to the bimetallic profile blank is forged treatment;The sprocket of forging forming is normalized;After the sprocket blank of normalizing is sprocket rough machining tooth groove, inner hole, outer circle, end face;The base body of sprocket is quenched and tempered heat treatment;Outer circle of sprocket base body, tooth type semi-finishing;Finish machining gear.The sprocket piece material of the application can satisfy that sprocket appearance hardness is lower, wear resistance is higher, not easy to wear during use.Connection sleeve material can satisfy that sprocket appearance hardness is lower inner hole hardness is softer, easy to gear.Adopt blank 3 fire forging process, can make blank internal grain refinement.

The application discloses a high-precision metal plate manufacturing belt wheel pattern forming method and equipment, S1. The embossed blank is prepared through a front stamping process, the center hole diameter of the embossed blank is controlled to be 0.39 times the diameter of the pattern petal contour edge, and the embossed surface material thickness of the embossed blank is 0.9-1.1 times the thickness of the raw material; S2. Stretching oil is applied to the outer diameter surface of the embossed blank, and the embossed surface of the embossed blank is cleaned by the surface treatment unit; the application realizes a systematic treatment scheme through a process-equipment collaborative mechanism, solves the cause-and-effect chain of flow instability-forming rebound-contour out-of-tolerance through center hole diameter, material thickness, surface treatment, positioning accuracy and giving-up design, so that the high-precision pattern forming meets the 0.015mm contour degree and R angle tolerance requirements, and the product qualification rate is improved.

Installation systems and methods for fenestration units configured to be set into a rough opening from an exterior side of a building structure or wall. The fenestration units may include a retention system coupled to the frame and operable to exert a retention force on the fenestration unit to maintain positive engagement of the fenestration unit with the rough opening framing and resist extraction of the fenestration unit from the rough opening upon insertion of the fenestration unit in the rough opening from the exterior side of the rough opening.

The invention discloses a complex structure casting resin sand gravity casting liquid weight calculation method, and relates to the technical field of equipment manufacturing, and the method comprises the following steps: building a casting part finished product three-dimensional model; the machining allowance grade is determined according to the nominal size of the part finished product three-dimensional model, and the part finished product three-dimensional model is adjusted based on the machining allowance grade to obtain a process blank model; designing a pouring pipeline model and a riser model; obtaining the volume of each model based on three-dimensional design software; selecting a reasonable volume shrinkage rate epsilon v according to the element content in the raw material molten steel; obtaining a resin sand box expansion rate fv based on measured data; correcting the volume of the process blank model based on the volume shrinkage rate epsilon v and the resin sand box expansion rate fv; and the mass of molten iron needed for pouring is calculated based on the volume of each model. According to the method, the residual molten steel is smaller than or equal to 4%, the yield is 50% or above, the material utilization rate is synchronously increased by 3-10%, cost reduction, energy conservation and zero test are achieved, and the problem that molten steel raw materials are wasted during gravity casting of complex-structure casting resin sand is solved.

The utility model relates to the technical field of casting, and discloses a cylinder sleeve air inlet starting line position core finishing tool structure which comprises a clamp, a seventh core and an eighth core are arranged in the clamp, air inlets are formed in the outer side of the seventh core and the outer side of the eighth core, a third core is arranged in the seventh core and the eighth core, and the seventh core and the eighth core are arranged in the third core. A first core, a second core, a fifth core and a sixth core are sequentially and fixedly connected to the third core from top to bottom, a fourth core is fixedly connected to the outer side of the fifth core, a core repairing positioning body is inserted into the seventh core and the eighth core, a rotating body is rotationally connected to the top of the core repairing positioning body, and a sample plate is fixedly connected to one end of the rotating body. According to the utility model, the core finishing positioning body is matched with the scraper in a rotating manner, so that interference is eliminated, automatic centering is realized, and the concentricity and dimensional accuracy of the sand core are improved. And putty smearing and drying are optimally matched, so that excessive gaps or poor finishing is avoided. And finally, the sand core is compact in structure and accurate in size, the blank qualification rate is greatly increased, and a guarantee is provided for subsequent production.

The utility model discloses a water pump cover casting mold capable of preventing core breakage during molding, which relates to the technical field of casting molds and comprises a mold plate, two upper molds arranged on the top surface of the mold plate, two lower molds arranged on the bottom surface of the mold plate, a first straight pouring column arranged on the top surface of the mold plate, a second straight pouring column arranged on the bottom surface of the mold plate, and a third straight pouring column arranged on the bottom surface of the mold plate. The second straight pouring column is arranged on the bottom surface of the template and is coaxially arranged with the second straight pouring column, the lower cross gate is connected with the second straight pouring column, the ingate is vertically arranged on the lower mold, and the shunting piece is arranged on the top surface of the template and is connected with the ingate and the lower cross gate at intervals; according to the water pump cover casting mold capable of preventing core breakage during molding, smooth demolding of molding sand in a deep hole can be achieved, the situation that a water outlet through hole in the middle of a casting blank after molding and pouring is blocked and a casting is scrapped due to core breakage in the molding sand is avoided, and the percent of pass and the production efficiency of products are improved.

The present application relates to a kind of gasification slag coupling biochar preparation ceramsite adsorption material method, belong to solid waste resource technology field, comprising the following steps: step S1, prepare the following weight parts raw materials: 68-72 parts coal gasification slag, 9-12 parts cement, 8-10 parts sodium silicate water glass, 6-8 parts expanded perlite, 14-20 parts functionalized biochar, 130-150 parts modified liquid and 0.1-0.2 parts initiator;Step S2, preparation forming ceramsite roughcast;Step S3, modifier modification;The present application adds functionalized biochar and modifier, functionalized biochar contains hydroxyl, ester group, amide group, benzene ring and epoxy group biochar structure, not only can occur chelation with heavy metal cation, and can occur chemical crosslinking with modified liquid, form three-dimensional intercommunication network structure, through their common effect, improve the adsorption capacity of ceramsite adsorption material and chelating performance to metal ion.

According to the material-saving cutting method for the simple special-shaped stone through the diamond wire saw, the robot wire saw is used for cutting and separating the stone into small modules, and then the small modules are combined into a new product, so that the stone is saved, and stone waste is reduced; the cutting method comprises the following steps: step 1, selecting a blank of a to-be-cut piece; 2, on the basis of the selected to-be-cut piece blank, proper modeling and cutting track design are carried out according to requirements; step 3, programming the planned track by using robot offline programming software, constructing a straight line cylindrical surface, and exporting a cutting program; 4, the robot rope saw is started, a cutting program is imported, and the to-be-cut piece blank is cut; 5, after cutting is completed, the to-be-cut piece blank is cut and separated into four separation modules through cutting; step 6, cutting n to-be-cut piece blanks with the same size to form 4n separation modules; and step 7, selecting four small separation modules, and gluing through gluing surfaces to form the special-shaped stone product.

The invention belongs to the field of metal materials, and relates to a long-life temperature-resistant anti-crack composite plug and a preparation method thereof. According to the invention, through elaborate design of components of the metal layer, excellent hardness and wear resistance are provided, the material is suitable for high-temperature and high-wear working conditions, and by adding a proper amount of RE and Ni, the plasticity and toughness are improved while the material strength is improved, the service reliability is remarkably improved, and the service life is remarkably prolonged; an asymmetric thermal field which is fast in internal cooling and slow in external cooling is constructed, high-quality interface bonding and a compact structure are achieved in the composite casting process, a surface pressure stress field beneficial to crack resistance is formed in the service process, thermal stress concentration is effectively relieved, generation and extension of thermal fatigue cracks are restrained, and the service life of the composite casting is prolonged. And the service life, temperature resistance and crack resistance of the composite plug are improved.

The utility model provides a special vehicle fluted disc blank extrusion forming device which is characterized in that a plurality of sand cores are stacked in multiple layers in the vertical direction, and a fluted disc blank is formed in a cavity of each sand core; the cavity of each layer of sand core is provided with a plurality of flow gates; the ingates are communicated and connected with the inner sprues of the sand cores, and the cavities of the sand cores are communicated into a whole through the inner sprues; a dead head is arranged at the uppermost part of the device, is connected to a cavity sprue of the sand core at the topmost layer, and is interconnected and communicated with the ingate; a sprue is designed in the device, the ingates of the sand cores on the bottommost layer converge at the lowest position of the sprue through the bottom runner, and the sprue is higher than the sand cores on the topmost layer and is flush with the dead head. According to the utility model, a plurality of blanks share one upper and lower combined cavity device, and are formed through one-time casting, so that the simultaneous mold filling process of a plurality of products can be ensured, the production efficiency is improved, the defects of sand holes, air holes and the like can be effectively reduced, and the quality of the product blanks is ensured.

The invention relates to the field of seven-stringed plucked instrument designing and manufacturing techniques, in particular to a chopping technique for a seven-stringed plucked instrument embedded with a sound beam, which comprises the following steps: S1, narrow groove digging: presetting the size of a narrow groove, cutting red sandalwood into preliminary blank battens by using a sawing tool, and planing the blank battens by using a planing tool to enable the surfaces of the battens to be flat and smooth, respectively determining the positions of two narrow grooves in treble and bass areas of the groove belly of the guqin panel; and S2, sound beam finishing and polishing are conducted, specifically, the machined red sandalwood battens are further finished, whether the edges of the red sandalwood battens are neat or not is checked, abrasive paper is used for polishing the red sandalwood battens, and polishing is started from raw abrasive paper. According to the guqin, the treble and bass beams are additionally arranged, so that the panel of the guqin has the acoustic characteristics of different wood materials, the ideal treble and bass effect can be achieved, the coexistence of the drum sound and the golden stone sound required by the guqin is achieved, and the guqin is more stable and not prone to deformation due to the fact that the sound beams are additionally arranged.

The present invention belongs to the technical field of refractory materials, and specifically relates to a composite thermal insulation tin bath bottom brick and a preparation method thereof. A lightweight mixture is poured into a steel mold and mechanically vibrated for 10 to 20 minutes. A heavy mixture is then poured into the mold containing the vibrated lightweight mixture. After vibrating for 5 to 10 minutes, the mixture is allowed to stand and cure for 12 to 24 hours. The mixture is then demolded and cured for 12 to 15 hours to obtain a rough composite brick. The rough composite brick is then dried for 24 to 36 hours, sintered at high temperature, and then cooled to obtain the composite thermal insulation tin bath bottom brick. The present invention can improve the porosity and thermal insulation effect of the tin bath bottom brick while ensuring the mechanical strength and alkali corrosion resistance of the tin bath bottom brick.

This invention discloses a method for machining thin-walled, porous, irregularly shaped single-sided frame parts, belonging to the field of machining technology. The method includes the following steps: pretreatment, placing the part blank in a constant-temperature furnace to release stress; milling the reference surface, milling a reference surface on the surface of the part blank to complete the machining of bolt holes on the edge of the part blank; rough and finish milling the smooth surface, using a two-step progressive feed method to complete the milling of the smooth surface of the part; rough and finish milling the frame surface, cutting the frame surface layer by layer from the outside to the inside according to the frame surface contour; drilling and blanking, machining the remaining positioning holes and weight-reducing holes, and then blanking the part using wire cutting; and fitter finishing, removing burrs and flash from the surface of the part and the holes, and using a coordinate measuring machine to inspect and finish any out-of-tolerance areas. The beneficial effects of this invention are: it reconstructs the machining sequence and process logic, reverses the existing machining sequence, and structurally avoids the problem of insufficient support caused by cavities, making it suitable for machining thin-walled, porous, irregularly shaped single-sided frame parts.

The invention belongs to the technical field of refractory materials, and particularly relates to a composite heat preservation tin bath bottom brick and a preparation method thereof.The preparation method comprises the steps that a light mixture is poured into a steel mold, mechanical vibration is conducted for 10-20 min, then a heavy mixture is poured into the mold of the vibrated light mixture, vibration is conducted for 5-10 min, standing and curing are conducted for 12-24 h, then demolding and curing are conducted for 12-15 h, and a blank composite brick is obtained; and drying the blank composite brick for 24-36 hours, sintering at high temperature, and cooling to obtain the composite heat-preservation tin bath bottom brick. According to the invention, the mechanical strength and alkali corrosion resistance of the tin bath bottom brick can be ensured while the porosity of the tin bath bottom brick is improved and the heat preservation effect is improved.

The present invention relates to an irregular casting processing method based on vector projection deviation compensation, which belongs to the field of mechanical processing and manufacturing. The method comprises the following steps: selecting two mutually perpendicular surfaces A and B from the non-machined surfaces of a part blank; aligning Z and Y direction lines according to surfaces A and B, generating an X direction, and determining the initial position of the part blank in the X direction of the part coordinate system; clamping the part blank according to the lines in the X, Y, and Z directions, and performing rough processing; selecting a non-machined surface C, the normal of which is at an angle β with the X direction; measuring the actual wall thickness of the non-machined surface C of the part after rough processing, and simultaneously determining the theoretical wall thickness of the non-machined surface C on the part model; calculating the positional deviation of the non-machined surface C on the part relative to the non-machined surface C on the model in the X direction, and determining the position of the part blank in the X direction; processing the part after deviation compensation to complete the part processing. The present invention can achieve accurate fitting of the part blank with the three-dimensional model, providing a basic guarantee for qualified processing of the part.

The utility model belongs to the technical field of space planning measurement, and particularly relates to a pay-off device for space planning, which comprises an outer shell, a plurality of inner cavities are arranged in the outer shell, inner cavities of the inner cavities are rotatably connected with a winding roller, a measuring rope is wound on the winding roller, a base is arranged at the bottom of the outer shell, and the measuring rope is wound on the base. A universal ball assembly is arranged between the outer shell and the base; according to the invention, wire drawing measurement can be simultaneously carried out towards four sides without mutual interference, the pay-off mechanism is adjusted to a horizontal position before measurement, and the wire drawing is kept horizontal in a building blank state and when the ground and the like are uneven, so that the accuracy of a measurement effect is ensured, impurities, soil and the like on the surface of a measurement wire rope can be cleaned during wire winding, and the measurement efficiency is improved. And when the measuring rope is reset and wound on the winding roller, other positions cannot be polluted, so that the problem that the service life is affected due to the fact that dust, soil and the like are attached to the surface of the measuring rope for a long time is solved.

The utility model discloses a processing and positioning device and a processing system for an inspection block. The processing and positioning device for the inspection block comprises a clamp body, a workpiece mounting groove is formed in the clamp body; a to-be-processed inspection block blank is placed in the workpiece mounting groove; the front end of the clamp body is provided with a first compression screw which is longitudinally distributed; the inspection block blank piece is located right behind the first compression screw; the right end of the clamp body is provided with a screw sleeve; the thread sleeve is in threaded connection with a second compression screw which is vertically distributed; the inspection block blank is located right below the second compression screw; two first positioning pins are vertically arranged at the rear end of the clamp body in a penetrating manner; a second positioning pin is vertically arranged on the front side of the clamp body in a penetrating manner; and the front side and the rear side of the inspection block blank are respectively contacted with the second positioning pin and the first positioning pin. The positioning device can conveniently and reliably position the blank of the inspection block, ensures the positioning accuracy, is favorable for further processing the vertical through hole of the workpiece, and ensures the processing accuracy.

The present invention discloses a tooling for reducing the cracking probability of a shell during casting and a casting production process, which relates to the field of investment casting and includes the following steps: Step S1, group the workpieces with flanges according to various parameters and processes, press the wax patterns and wax pattern combinations to complete the combined system; Step S2, coat, sand hang, and dry the shell after grouping; Step S3, roast the shell, with a roasting time of 1.5 h and a roasting temperature of 900-1000 °C, and cool the shell; Step S4, install the casting tooling, and apply pressure through the close contact of the casting tooling to the flange surface; Step S5, cast the shell along the casting port; Step S6, take out the casting after shaping, perform stacking cooling, and perform rough machining. Apply pressure through the tooling to conduct to the two flange surfaces of the workpiece, and then transfer to the weak part of the inner cavity cavity shell. Finally, ensure that after the molten steel is poured into the shell, the self-pressure and weight of the molten steel do not exceed the bearing limit of the shell, and ensure that there is no problem of molten steel running out during the production of the workpiece.

The invention discloses a blank sand removing device for high-pressure oil pump body machining. The blank sand removing device comprises a conveying structure and a clamping sand removing structure. The conveying structure comprises a b-shaped conveyor body, a mounting groove is formed in the surface of a conveying belt of the conveyor body, toothed plates with fillets are arranged on the two sides of a vertical downward section, and hydraulic jacks are arranged on the same side. The clamping sand cleaning structures are distributed along the conveying belt in an array mode, connected with the mounting grooves through bolts and provided with mounting bodies. A worm in the mounting main body is connected with a gear through a bevel gear set; the gear is meshed with a driving gear ball moving along with the toothed plate; the worm drives the worm gear to drive the reciprocating screw rod to enable the transmission seat to reciprocate, and the injection pipe sprays water to clean sand; the reciprocating screw rod is connected with a cam through a universal shaft to drive a frequency vibration rod to knock the pump body; the device is provided with a self-adaptive clamping structure, an attached disc and a folding sealing layer form a sealed space, sand water is recycled through a liquid recycling hole, sand can be efficiently cleaned, the inner wall of the pump body is prevented from being abraded by molding sand, and continuous operation is achieved.

The application discloses a surface treatment method suitable for high-voltage large-size copper-chromium contact materials, and the surface treatment method comprises the following steps: blank mechanical machining and oil removal treatment, wet sand blasting on an arc surface, magnetic grinding, vacuum cleaning and drying, and product packaging and warehousing. The surface treatment method has the advantages of simple and controllable process, good product surface consistency, effective tool cost saving, high machining efficiency, and the significance of batch production and machining popularization.

The application discloses a heat treatment method for improving the depth of a hardened layer on the surface of 40CrNi2Mo, and comprises the following steps: selecting a blank casting of 40CrNi2Mo, quenching and tempering the blank casting, heating the blank casting at 850 DEG C, keeping the temperature for 6 hours, and water cooling after discharging; heating the blank casting at 580 DEG C, keeping the temperature for 10 hours, and air cooling after discharging; rough milling the blank casting, and then stress relieving annealing, wherein the annealing temperature is 500-530 DEG C, the keeping time is 10 hours, and the blank casting is air cooled after being cooled to 200 DEG C in the furnace. The method can deepen the quenching layer depth and reduce the occurrence of quenching cracking of the part.

The method includes the steps of providing a semi-finished product (11), hot forging the semi-finished product (11) by upsetting to form a blank (13) with a developed surface that is larger than the developed surface of the semi-finished product (11) and smaller than the developed surface of the wall (3) of the dome, hot forming the blank (13) to create a preform (15) with a developed surface that is equal to or smaller than the developed surface of the wall (3), the preform (15) including at least two successive portions (19, 21) extending radially next to each other away from a central axis (AA), the average thickness and / or convexity of the two successive portions (19, 21) being different for all portions (19, 21), and hot deforming the preform (15) under pressure between a die and a punch to form the wall (3).