257 results about "Investment casting" patented technology

The invention relates to the technical field of titanium alloy investment precision casting, and particularly provides a titanium alloy multistage deep blind hole investment casting method which comprises the following steps: designing an exhaust hole and a slag removal hole; establishing a model; assembling and welding; soaking the surface layer in a vacuum negative pressure environment, continuously vacuumizing, deflating after soaking, taking out the module, and rotating to uniformly control the slurry; preparing a surface layer; performing segmented grouting on the deep blind hole; making a shell from a back layer; roasting and molding; washing and drying; pouring is conducted; shell cleaning and sand blasting; sealing and welding the process holes; and performing stress relief annealing. And a dynamic vacuumizing means is adopted, and a vacuumizing device is always kept in an open state, so that the compactness of a surface layer is improved, and burrs of a casting are reduced. Through vacuum dynamic slurry immersion, segmented grouting and collaborative design of the exhaust hole and the slag removal hole, investment precision casting forming of the high-precision oil pump shell can be supported, the shell manufacturing efficiency of the multi-stage deep blind hole is improved, and the filling defect rate is reduced.

The invention relates to the technical field of precision investment casting, in particular to an optical lens motor base precision forming die which comprises a fixing plate, a forming mechanism is arranged at the top of the fixing plate, and an upper die plate is arranged at the top of the forming mechanism; the forming mechanism comprises a butt joint unit arranged in the center of the top of the fixing plate, the butt joint unit comprises a main body fixedly connected with the fixing plate, a first ejector block is slidably connected to the position, close to the bottom, in the main body, and lifting blocks are arranged at the positions, located on the periphery of the first ejector block, in the main body; a butt joint rod is slidably connected to the center position in the first ejector block, and a pressing block is slidably connected to the position, below the butt joint rod, in the main body. Through linkage of the module assembly and the butt joint unit, the problems of wax mold demolding deformation cracking and parting surface steps are solved, and the integrity of the wax mold is guaranteed; by means of linkage of the cutter and the exhaust groove, residual wax is automatically cleaned, manual operation is not needed, shrinkage porosity is avoided, and the structural stability of the base is guaranteed.

The invention relates to the technical field of investment casting, in particular to an investment casting shell making method of an air inlet casing casting and a shell. The method comprises early-stage preparation (high-precision wax mold manufacturing and module assembling), a shell manufacturing process (shell manufacturing of a surface layer, a transition layer and a back layer) and subsequent procedures (dewaxing, roasting, pouring, cleaning and detecting). The surface layer and the transition layer are dried by silica sol-based paint (zircon powder / mullite powder) in cooperation with strong wind power, so that the surface quality and the initial strength are ensured; the back layer is hardened by adopting a water glass-based coating (coal gangue powder) matched with ammonium chloride, so that the supporting strength and air permeability of the main body are provided. By optimizing a composite shell-making material system and process parameters, the problem that in the prior art, the strength, the air permeability, the quality and the efficiency of a shell are difficult to consider at the same time is solved, and the method is particularly suitable for production of complex thin-wall castings such as aero-engine air inlet casings with extremely high requirements for the surface quality, the size precision and the internal structure; the defects of air holes, slag inclusion and the like can be effectively reduced.

The invention discloses a preparation method of a ceramic core plasticizer for high-temperature alloy investment casting, and relates to the technical field of plasticizers, and the preparation method comprises the following preparation steps: step 1, adding microcrystalline wax into modified chlorinated paraffin, heating, stirring and melting, adding a heat stabilizer, mixing, continuously stirring, heating for reaction, adding polyethylene wax, and continuously stirring; 2, after cooling, adding stearic acid, and continuously stirring; and 3, granulating and packaging to obtain the special plasticizer for the ceramic core. According to the preparation method of the ceramic core plasticizer for high-temperature alloy investment casting, polar groups such as hydroxyl groups and ester groups are introduced to a chlorinated paraffin molecular chain, strong interaction is formed between the polar groups and hydroxyl groups on the surface of ceramic powder, and a uniform wax coating layer is formed on the surface of powder particles.

The present application relates to wax mold technology field, disclose a kind of large thin-walled wax mold and for wet wax precision casting production process, including fixing frame, the fixing frame is provided with electric push rod, movable mould and fixed mould, the movable mould, fixed mould is provided with heat dissipation mechanism, the movable mould is provided with stripping mechanism, the fixed mould is provided with top pressure mechanism and wax injection port, the movable mould is also provided with rotating mechanism, the rotating mechanism includes motor and locking piece.The present application can demould the workpiece, while avoiding the workpiece from being stuck in the fixed mould, thereby greatly improving the practical convenience, and after demoulding the workpiece, water-based release agent can be sprayed in the fixed mould and movable mould, thereby avoiding the need for manual spraying of water-based release agent, and the forming effect and forming quality of the workpiece can also be improved, finally the locking piece can be automatically driven to contact and lock the fixed mould, thereby greatly improving the practicality and convenience of use.

The invention discloses a multi-stage composite sand cleaning method and system for investment casting of a narrow inner cavity casting, and relates to the technical field of investment casting, the method comprises the following steps: S1, primary shot blasting cleaning is carried out to remove floating sand on the outer surface of the casting and a shallow inner cavity, and a deep sand inlet is exposed; s2, inner cavity impact sand loosening is conducted, specifically, a sand body blocked in the deep portion of the inner cavity of the casting cracks and loosens through pneumatic impact; s3, ultrasonic vibration sand removal is conducted, specifically, the casting is installed on a special tool, loose sand grains are stripped from the inner cavity wall through ultrasonic vibration output by an ultrasonic generation unit, and a tuning control module is arranged to conduct real-time scanning on the casting and adjust the frequency of the ultrasonic vibration so as to be matched with the local resonance frequency of the inner cavity of the casting; s4, secondary shot blasting finishing is conducted, falling residual sand in the casting is removed, and surface finishing is achieved; and efficient, thorough and damage-free sand removal of sand grains in narrow, bent and deep inner cavities of the casting is realized through the multi-stage sand removal step.

The invention relates to a jeweler's rubber mold pressing device that ensures the alignment and placement of a two-part (upper and lower) rubber mold used in the injection of wax into rubber molds for jewelry investment casting technology. This is achieved by pressing the mold and aligning it with the injection nozzle of the injection machine in both vertical and horizontal directions, and then pushing it onto the nozzle.

The utility model discloses a sand spraying machine for investment casting, which is characterized in that the upper end of a base is provided with a sand spraying barrel body, the side wall of the upper end of the sand spraying barrel body is provided with a fixing bracket for fixing a wax mold, the upper end of the sand spraying barrel body is provided with a sand screening mechanism, the sand screening mechanism comprises an annular sand screening plate, and the sand screening plate is inclined downwards from the outer end to the inner end; the sand spraying barrel body comprises a coarse material collecting cavity formed in the middle and a fine material collecting cavity formed in the outer end, a bottom plate of the coarse material collecting cavity is higher than a bottom plate of the fine material collecting cavity, the sand spraying machine further comprises a sand pumping mechanism used for conveying sand in the fine material collecting cavity to the position above the outer end of the sand screening plate, and the inner end of the sand screening plate extends to the upper end of the coarse material collecting cavity. According to the sand spraying machine, the sand spraying barrel body is divided into the coarse material collecting cavity and the fine material collecting cavity, fine materials fall onto a wax mold from screen holes of the sand screening plate to be subjected to sand spraying operation, coarse sand directly falls into the coarse material collecting cavity through the sand screening plate to be recycled, efficient screening, conveying and recycling of the sand are achieved, and the utilization efficiency of the sand is improved.

The application relates to the technical field of investment casting and discloses an exhaust manifold investment casting equipment based on a hierarchical cooling shaping structure, which comprises a mold group, a main pipe core-pulling module and a branch pipe core-pulling module, the inside of the mold group is provided with a mold cavity, and the inside of the mold group is provided with a cooling pipeline; wherein the main pipe core-pulling module comprises a sliding block one, and the side close to the mold group of the sliding block one is fixedly installed with a core-pulling block. The exhaust manifold investment casting equipment based on the hierarchical cooling shaping structure can effectively solve the problem that, in the prior art, the conventional investment casting wax injection mold usually adopts an integral fixed core-pulling structure, and when the core-pulling is performed on the main pipe end of the exhaust manifold, due to the complex inner cavity curved surface at the intersection of the main pipe and the branch pipe of the exhaust manifold, the diameter of the arc connection at the intersection is greater than the diameter of the outer end of the main pipe, the contact area between the core body of the existing core-pulling structure and the inner wall of the wax mold is large, the friction force is strong, and the inner wall of the wax mold is prone to scratching, pilling and even tearing.

The invention relates to the technical field of investment casting, in particular to a method for reducing microporosity of a secondary aluminum alloy and an investment casting method. The method for reducing microporosity of the secondary aluminum alloy comprises the following steps that secondary aluminum alloy molten metal is poured into a mold shell, cooling and solidification are conducted after pouring is completed, and a casting is obtained; pressurizing a pouring chamber where the mold shell is located at the beginning of pouring, and stopping pressurizing until the molten metal is cooled to 400 DEG C; during pressurization, pressure is applied, so that the initial pressure P0 of the pouring chamber is 1.2-4 times of the standard atmospheric pressure. According to the method, in the pouring process of the secondary aluminum alloy molten metal, certain pressure is applied, so that microporosity of the surface and the interior of the secondary aluminum alloy casting can be greatly reduced, and the yield of the casting is greatly improved.

The invention discloses a method for controlling deformation of a margin plate of a turbine guide blade. The method comprises the steps that the easily-deformed part of the margin plate of the turbine guide blade and the corresponding structure size are determined; based on the structure size of the easy-to-deform part of the margin plate, the structure sizes of the target structural member, the first open slot and the second open slot are determined; based on the structural size of the target structural part, a corresponding special mold is determined, and the target structural part is prepared through the special mold; based on the structural size of the second open groove, the second open groove is designed in the blade mold core; based on the structural size of the first open groove, the first open groove is designed in the blade wax mold; the blade mold core and the target structural part are installed in a blade wax mold; and the blade wax mold is used for wax mold preparation, a target wax mold is obtained, and the target wax mold participates in the investment casting process, so that the turbine guide blade with the controllable margin plate deformation is obtained. By means of the method, deformation of the turbine guide blade margin plate can be controlled, and the production qualification rate of turbine guide blades is increased.

The utility model relates to the field of investment casting, and discloses a wax mould forming device for precision castings, which comprises a machine table, a hydraulic rod is mounted at the top end of the inner wall of the machine table, a fixing mechanism is arranged at the bottom end of the inner wall of the machine table, the fixing mechanism comprises a positioning assembly and a fine adjustment assembly, the positioning assembly comprises a lower supporting plate, and the fine adjustment assembly comprises a lower supporting plate. The bottom end of the lower supporting plate is fixedly connected to the bottom end of the inner wall of the machine table, a fixing hole is formed in the top end of the lower supporting plate, a lower mold is placed at the top end of the lower supporting plate, an upper mold is connected to the top end of the lower mold in an inserted mode, and multiple sets of positioning rods are connected to the inner wall of the fixing hole in an inserted mode. According to the utility model, by arranging the adjustable fixing mechanism and the wax conveying assembly, the positions of the fixing mechanism and the wax conveying assembly can be freely adjusted during processing, the processing point position can be freely changed by adjusting the positions of the fixing mechanism and the wax conveying assembly, and meanwhile, the fixing mechanism can assist an operator in aligning a mold with a wax injection head.

The utility model relates to the field of investment casting, in particular to an investment casting shell cleaning device which comprises a bottom plate, a supporting frame is arranged above the bottom plate, a placing frame is fixedly connected to the upper surface of the supporting frame, two supporting frames are slidably connected to the upper surface of the placing frame, and a clamping block is fixedly connected to the top end of each supporting frame. Each supporting frame is fixedly connected with a first driving piece, and a first driving rod is arranged below the containing frame. Through the arrangement of the supporting frame, the first driving piece and other components, the first driving piece can drive the clamping blocks to move through the supporting frame through the mutual matching relation between the supporting frame and the first driving piece, and therefore the clamping blocks can clamp the two ends of the module; therefore, the effect of fixing the modules of different sizes through the arrangement of the supporting frame and the first driving piece is achieved, and the defects that an existing technical scheme is lack of a clamping mechanism, and the modules are prone to falling off are overcome.

The invention discloses a liquid cooling drive pump body investment casting wax mold production wax injection mold, which comprises an upper mold, a lower mold, a slide block, a mold cavity and a loose piece, the bottom of the upper mold is provided with a first mold cavity groove, the lower mold is arranged right below the upper mold, the top of the lower mold is provided with a second mold cavity groove, and the slide block is arranged in the second mold cavity groove. A plurality of sliding block mounting grooves are formed in the surface of the top of the lower mold around the outer side of the second mold cavity groove, the sliding blocks are arranged in the sliding block mounting grooves in a one-to-one correspondence mode, the mold cavity is used for forming the wax mold and jointly formed by the upper mold, the lower mold and the sliding blocks, and the multiple movable blocks jointly form an inner cavity complex structure of the wax mold. The cavity is formed by the upper mold, the lower mold and the multiple sliding blocks, the wax mold in the cavity adopts a one-time mold splitting forming process, and the wax piece is taken out by mutually positioning and combining the movable blocks and splitting the mold in the complicated structure of the inner cavity, so that water-soluble wax does not need to be used as an inner cavity core-pulling core, water-soluble wax does not need to be dissolved in water in the subsequent process, and split welding is not needed; the mold splitting efficiency is improved; and the cost is reduced.

This application provides a method, apparatus, and equipment for detecting shell occupancy, relating to the field of casting process and quality inspection technology. It addresses the technical problems in related technologies where, during the investment casting production process, the detection of abnormal occupancy of the loading pallet and the mold chamber pallet via an automatic transfer system for transferring cold and hot shells is inaccurate, and abnormal shell posture cannot be identified in a timely manner. The method includes: acquiring pallet image information; determining the pallet occupancy status and shell posture status based on the pallet image information; acquiring a transfer command signal; generating an abnormal status signal based on the pallet occupancy status, the transfer command signal, and the shell posture status; adjusting the transfer command signal based on the abnormal status signal and the pallet image information to generate a real-time control signal; and controlling the transfer system to perform corresponding operations based on the real-time control signal.

This utility model relates to the technical field of investment casting drying equipment, specifically a sand shell drying device for investment casting. The drying chamber contains two symmetrically arranged limiting frames, each with a guide groove. A support plate is also provided inside the drying chamber, with both sides of the support plate inserted into the guide groove and slidably connected to the limiting frames. A tray is rotatably mounted on the support plate. A first motor is fixedly mounted below the support plate, and the output end of the first motor has a first rotating shaft connecting to the tray. A second motor drives the support plate to extend out of the drying chamber, allowing workers to directly place sand shells outside the chamber. This avoids the difficulty of loading materials due to the limited space inside traditional equipment, making it particularly suitable for mass production scenarios and significantly improving sand shell manufacturing efficiency.

The utility model relates to the field of lost wax investment casting technology, especially a kind of lost wax investment casting sand shell removal knocking tool.Its technical scheme includes: handle and knock head, the handle includes handle and connecting rod, the outer ring of handle is equipped with antiskid sleeve, the inner ring between the antiskid sleeve and handle is provided with rubber sleeve, the connecting rod is provided with positioning assembly.The utility model is set up four groups of different shapes of knocking surface on knock head, can adapt to sand shell of different angles and shapes, improves the efficiency and pertinence of knocking, reduces the damage to casting surface, improves the comfort and stability of operator holding by the setting handle setting antiskid sleeve and rubber sleeve of handle outer ring, guarantees the stability of knock head and handle when being in assembly state by the setting positioning assembly, it is convenient for operator to quickly dismount and replace knock head, can select appropriate knock head according to different sand shell conditions, improves the versatility and practicality of tool.

The utility model provides a turnover type slurry preparation barrel, and belongs to the technical field of investment casting equipment. The turnover type slurry preparation barrel comprises a barrel body, a fixing frame and a turnover device, a movable frame of the can body is fixedly connected with a can body, a bottom plate in a fixed frame is located at the bottom of the frame, and trundles are located on the bottom plate. The turnover device comprises a rotating wheel, an input shaft, a first mounted bearing, a second mounted bearing, a coupler, a speed reducer, an output shaft, a third mounted bearing and a turnover position fixing mechanism; the rotating wheel, the first mounted bearing, the coupler and the input end of the speed reducer are coaxially connected in sequence, and the first mounted bearing and the second mounted bearing are located on the input shaft and fixedly connected with the frame. The bottom of the speed reducer is fixedly connected with the frame; the input shaft is vertical to the output shaft; the output end of the speed reducer penetrates through the third mounted bearing through an output shaft, the output shaft is a flange type solid shaft, a flange at one end is fixed to the movable frame, and the turnover position fixing mechanism is located on the input shaft. The device has the advantages of being simple in overall structure and convenient to operate manually, the labor intensity of workers can be reduced, waste is reduced, and cost is reduced.

The invention provides an investment casting cooling device and a cooling method thereof, and relates to the technical field of investment casting cooling, the investment casting cooling device comprises a corrugated pipe, the corrugated pipe can be arranged according to a hot spot area or a key cooling area of a casting, the flow direction of a cooling medium can be well controlled through the corrugated pipe, so that the area needing to be cooled is controlled, and the cooling efficiency is improved. And the air outlet in the corrugated pipe deviates from the pouring gate, so that the pouring gate is effectively prevented from being cooled, feeding can be more effectively carried out, and the technical problems that in the prior art, the action range of liquid nitrogen airflow flowing at a high speed is difficult to accurately control, and a feeding pouring gate system is inevitably affected while a casting body is cooled are solved.

This invention belongs to the field of numerical simulation of investment casting, and relates to a high-precision numerical simulation method, system, and product for the wax pattern filling process of investment casting. The method includes updating boundary conditions and determining the time step Δt; solving for the flow field, temperature field, and updating the viscosity based on the known field quantities of the current time step; the known field quantities include the flow field and temperature field obtained in the previous time step; performing interface tracking based on the flow field to obtain the free surface between the wax and air, thereby distinguishing between filled and unfilled areas; determining whether to continue time progression according to a preset filling ratio; if time progression is stopped, outputting the results of the flow field, temperature field, viscosity field, and the change of the free surface over time during the entire wax pattern filling process.

The invention relates to the technical field of investment casting, in particular to a casting liquid fluidity experiment device and method. The casting liquid fluidity experiment device comprises a pouring cup, a main pouring gate, a bent pouring gate, a bottom pouring transverse pouring gate and a bottom pouring test plate. The first end part of the main pouring gate is communicated with the pouring cup; one end of the bent pouring gate is communicated with the bypass position of the main pouring gate; one end of the bottom pouring cross gate is communicated with the second end part of the main pouring gate; the interior of the bottom pouring test plate is hollow; one end, far away from the main pouring gate, of the bottom pouring cross gate is communicated with the bottom pouring test plate; the extension direction of the bottom pouring test plate is intersected with the extension direction of the bottom pouring cross gate; the bottom pouring test plate and the bent pouring gate are positioned on the same side of the bottom pouring cross gate; the cross section of the bottom pouring test plate is rectangular; the extension length of the bent pouring gate is greater than that of the bottom pouring test plate; in this way, the problems that in the prior art, casting liquid fluidity testing is single, and evaluation is not comprehensive enough are solved.

The utility model provides a shaping device and hydraulic shaping equipment for a double-layer round-mouth product, and relates to the technical field of precision investment casting, a casting product inserted with an arc-shaped shaping strip leans into a lower semicircular cavity of a lower pressing plate main body, an upper pressing plate main body is pressed downwards, the upper pressing plate main body and the lower pressing plate main body are subjected to mold pressing, and after mold pressing is performed once, the arc-shaped shaping strip is pressed downwards. After the casting product is rotated by 180 degrees, shaping is finished, the casting is taken out, and the arc-shaped shaping strip is taken out, so that the shaping effect is good, the consistency is high, the shaping cost is low, and the shaping efficiency is high; and the limiting replacement block protrudes out of the top face of the lower pressing plate body, the shaping pre-pressing amount is adjusted according to the characteristics of different casting products, and therefore the effect that the shaping size is adjustable is achieved.

The present application belongs to the technical field of investment casting, and particularly relates to a manufacturing process of a impeller shell. The manufacturing process of the impeller shell comprises the following steps: 1) preparing a wax mold; 2) preparing a surface layer shell; 3) preparing a back layer shell; 4) sealing the shell with slurry; 5) dewaxing; and 6) baking. The manufacturing process of the impeller shell has the characteristics of short production cycle, low production cost, good shell removal, high finished product rate and the like, and improves the casting quality of the castings containing the impeller with a runner width less than 4 mm in the production of the casting industry.

The invention relates to the manufacturing technology of fluid conveying equipment, in particular to a manufacturing method of a connecting pipe and the connecting pipe for a pressure-equalizing water mixing tank, and aims to solve the problems that a traditional connecting pipe is insufficient in structural strength and poor in corrosion resistance under the high-pressure working condition of a heating system. By using the alloy steel material with specific chemical components and combining the optimization process steps of hot forging and pressing preforming, precise investment casting, deburring and polishing, inert gas shielded welding, passivating treatment and the like, high strength and high corrosion resistance of the connecting pipe are combined, and the connecting pipe has excellent mechanical strength and corrosion resistance.

The invention relates to a finite element simulation grid-based reversible deformation design method and system for an investment casting. According to the method, a coordinate ID matching algorithm is utilized, a mapping relation is established between displacement data in an analyzed grid node displacement data file and corresponding nodes in an initial grid file, and an intermediate grid file containing casting deformation data is generated; by using a data mapping algorithm, reversely assigning the intermediate grid file to the initial grid file, and reconstructing to obtain a corrected grid file containing a reversible deformation feature; and finally, converting the corrected grid file into a three-dimensional geometric model as a reversible deformation design model for investment casting mold manufacturing. Compared with the prior art, the method has the advantages of simple process, high design precision and the like.

The application provides a precision investment casting smelting centrifugal solidification device, which comprises a fixing frame, a rotating barrel, a placing frame, a first clamping arm and a second clamping arm. The precision investment casting smelting centrifugal solidification device is used in the following manner: first, the position of the moving frame is adjusted to move upwards and be located above the rotating barrel, so that an operator can conveniently place a mold shell between the first clamping arm and the second clamping arm and clamp the mold shell outside a sprue cup through a first guide wheel on the first clamping arm and a second guide wheel on the second clamping arm, and finally, the placing frame is driven to move downwards, so that the mold shell is placed inside the rotating barrel. The positions of the first guide wheel and the second guide wheel can position the sprue cup, and when the mold shell is rotated and condensed later, the multiple mold shells in the circumferential direction can be ensured to be subjected to stable centrifugal force. After the condensation is completed, the mold shell can be taken out through the placing frame, and the operation is convenient and the use is convenient.

The invention discloses a silica sol-yttrium oxide composite mold shell surface layer for TiAl alloy investment casting and a preparation method of the silica sol-yttrium oxide composite mold shell surface layer, and relates to the technical field of metal smelting. The mold shell surface layer slurry is prepared from double-granularity zirconium oxide stabilized electric smelting yttrium oxide powder, calcium carbonate, tetramethylammonium hydroxide, silica sol, water, a wetting agent and a defoaming agent. The preparation method comprises the following steps: preparing slurry, soaking the mold shell in the slurry, spraying sand, drying, and soaking and drying yttrium sol. According to the invention, through raw material grain size distribution optimization, mineralizer addition and pH regulation, the problems of poor hydration resistance and insufficient mold shell sintering of traditional yttrium oxide slurry are solved; the interface reaction is inhibited by means of yttrium sol dipping, the mechanical property and chemical inertness of the mold shell are improved, the obtained mold shell is good in surface layer stability and excellent in thermal shock resistance and anti-stripping performance, the requirements of high-end aviation equipment are met, and the technical bottleneck of TiAl alloy investment casting is broken through.

The utility model provides a wax mould surface slurry coating device, which belongs to the technical field of investment casting, and aims to solve the problems that the thickness of a shell is not uniform due to the fact that a part of the position of a wax mould is possibly thinner during coating, and sand blasting needs to be matched in the slurry coating process, and the movement of the wax mould is time-consuming and troublesome due to back-and-forth control. The transverse moving mechanism is fixedly connected with the slurry dip dyeing pool and the quartz sand spraying box; the top of the rotary supporting mechanism is fixedly connected with the transverse moving mechanism. The swing angle control mechanism is mounted in the rotary supporting mechanism; the wax mold can be fixed at any angle, slurry coating of the wax mold is facilitated, and time is saved; and the slurry coating effect and the slurry coating uniformity can be improved through rotation of the wax mold, and sand blasting is facilitated.

The utility model relates to the technical field of casting part transportation, and discloses a transfer tool for investment casting of complex structural parts, which comprises a base, a supporting column is fixedly mounted in the middle of the upper end of the base, a supporting plate is rotatably mounted at the upper end of the supporting column, sliding grooves are formed in the two sides, the front part and the rear part of the upper end of the supporting plate, and moving rods are slidably connected in the sliding grooves; a mounting frame is mounted on one side of the upper end of the movable rod, a pressing plate used for clamping a casting part is fixedly connected to the middle of one side of the mounting frame, the casting parts of different specifications can be clamped by arranging the adjustable movable rod, the mounting frame, an auxiliary pressing block, a spring, the pressing plate and other structures, the pressing plate is driven by the adjustable movable rod to move, and therefore the casting parts can be clamped. According to the casting part transfer tool, the pressing plate can make contact with the side of a casting part and clamp the casting part, elastic force is provided through the spring and applied to the auxiliary pressing block, the auxiliary pressing block is attached to the casting part for auxiliary clamping, and therefore the casting parts of different specifications can be conveniently clamped and fixed, transfer of the casting parts is facilitated, and the application range of the transfer tool is widened.

The invention belongs to the technical field of casting, and provides an investment casting process of a martensitic stainless steel material part, according to the investment casting process of the martensitic stainless steel material part, through introduction of silicon carbide and metamorphism of a rare earth ferrosilicon alloy, the thermal expansion coefficient of steel is reduced, and the performance of the martensitic stainless steel part is improved. And meanwhile, structure grains in the martensitic stainless steel solidification process are remarkably refined, formation of thick and large matrix structures is reduced, and therefore internal stress generated in the casting solidification stage is reduced. And meanwhile, the plasticity and toughness of the material can be improved through the refined crystal grains, the adaptive capacity of the casting to martensite transformation volume change in the subsequent heat treatment process is enhanced, accumulation of internal stress is relieved, and finally cracks are effectively restrained. Compared with existing schemes such as casting temperature optimization and shell deformability adjustment, the process improves the material performance from the structure level through modification treatment, the anti-cracking capacity of the casting can be fundamentally improved, meanwhile, the size precision and the mechanical property of the casting are considered, and the bottleneck of the prior art is broken through.