An engine cylinder block lost foam mold molding device and casting method

Abstract

The application discloses an engine cylinder body lost foam mold modeling device and a casting method. A plurality of modeling units are arranged in the form of an annular array, and each adjacent modeling unit has a spacing a. The modeling unit comprises a lifting linear degree of freedom, a feeding linear degree of freedom and a universal linear degree of freedom, and a seismic source for modeling. For each cell i, the following steps are performed: calculating the temperature gradient of the cell i using the temperature value difference calculation in the Moore neighborhood Ni. The technology provided by the application uses a temperature sensor to monitor the temperature distribution inside the mold in real time, calculates the rate prediction value through a cellular automaton, and thus realizes accurate control of fluid flow. Based on the prediction ability of the temperature distribution, the fluid flow situation can be predicted in advance, and corresponding control can be performed to ensure the casting quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine mold, in particular to a lost foam mold modeling device for engine cylinder block and a casting method. BACKGROUND

[0002] The lost foam mold for engine cylinder block is a high-efficiency manufacturing process for casting complex-shaped parts such as engine cylinder blocks. This method uses polystyrene (EPS) or other similar materials to make molds, and then pours molten metal inside the mold to form the desired parts. The lost foam mold is named because the mold itself is melted by high-temperature metal during the casting process, so it does not exist at the end, leaving only the cast metal parts.

[0003] Specifically, this mold is made of polystyrene (EPS) or other meltable materials, and according to the design of the part, a model that is a mirror image of the part is made. The surface of the model is usually coated with a special adhesive or paint to enhance the heat resistance and adhesion of the surface. This helps to ensure that the model does not deform or damage during the casting process. The model is placed in a casting box and then wrapped with sand or other filler material. The purpose of the filler material is to provide support and positioning for the model, and also to withstand the pressure of the metal during the casting process. The metal is usually poured into the mold in liquid form to fill the entire space inside the mold. The high-temperature metal melts the EPS model, replacing it as the internal structure of the final part. The EPS material inside the mold melts and vaporizes under the action of high-temperature metal, eventually disappearing, leaving only the cast metal parts.

[0004] The vibration molding operation of the lost foam mold is a process for assisting the flow of fluid to ensure the quality of casting. During the casting process of the engine cylinder block, by applying a vibration force outside the mold, it can help to remove gas from the molten metal of the cylinder block, reduce the formation of bubbles and pores, and improve the density and quality of the cylinder block casting. It can also help the metal to fill the inside of the mold more evenly, ensuring that all parts of the complex-shaped part are fully filled, avoiding incomplete cylinder block castings. Vibration can help remove bubbles and residues on the surface of the mold, thereby improving the surface quality and smoothness of the cylinder block casting. It can also help reduce the formation of solidification shrinkage, a common defect that can reduce the strength of the part.

[0005] However, through long-term work and research by the inventor, it has been found that the lost foam mold modeling in the traditional technology has the following technical problems that need to be solved:

[0006] (1) Lack of precision and adaptability: Traditional techniques usually only manually apply fixed or irregular dynamic excitation on the periphery of the casting box, lacking accurate control and adjustment capabilities for internal fluid flow conditions. This makes it difficult to meet the needs of different casting conditions and material properties, resulting in unstable casting quality.

[0007] (2) Lack of uniformity: Traditional techniques often struggle to achieve uniform vibration throughout the lost foam mold, with specific areas potentially being affected by excessive or insufficient vibration, leading to unevenness and defects in the castings.

[0008] (3) Unable to adjust in real time: Traditional techniques usually cannot monitor and adjust fluid flow conditions in real time during the casting process, making it difficult to respond to sudden changes or material properties, resulting in rigidity and inadaptability in the production process.

[0009] (4) Limited to the manufacture of complex structures: Traditional techniques struggle to meet the casting needs of complex structures, as they often lack sufficient control precision and adaptability to handle molds with multiple changes.

[0010] (5) Low energy efficiency: Fixed or irregular dynamic excitation can result in unnecessary energy waste, as they do not dynamically adjust energy consumption according to actual needs.

[0011] To this end, a lost foam mold modeling device and casting method for an engine cylinder block are proposed. SUMMARY

[0012] Therefore, the embodiments of the present application aim to provide a lost foam mold modeling device and casting method for an engine cylinder block to solve or alleviate the technical problems existing in the prior art, i.e., lack of precision and adaptability, lack of uniformity, inability to adjust in real time, limitation of complex structure manufacturing, and low energy efficiency, and at least provide a beneficial choice;

[0013] The technical solution of the embodiments of the present application is as follows:

[0014] First aspect

[0015] A lost foam mold modeling device for an engine cylinder block, comprising: a cylindrical shell and a lost foam placing rack arranged in the middle of the shell, a casting box (hereinafter referred to as "mold") of a lost foam mold is clamped on the lost foam placing rack; a plurality of modeling units are arranged in a ring array around the outside of the lost foam placing rack and the lost foam mold carried thereon, and each adjacent modeling unit has a spacing a;

[0016] The molding unit comprises a lifting linear degree of freedom, a feeding linear degree of freedom, and a universal linear degree of freedom, and a vibration source for molding, the lifting linear degree of freedom, the feeding linear degree of freedom, and the universal linear degree of freedom are respectively used to adjust the lifting, feeding, and universal orientation adjustment of the vibration source to the external orientation of the lost foam mold; the vibration source applies a vibration force to the outside of the lost foam mold on this basis, assisting the molding of the mold.

[0017] Further comprising a topological measurement mechanism arranged outside the lost foam placing frame and the lost foam mold carried thereby, the topological measurement mechanism is provided with a plurality of measurement units in the form of a ring array around the outside of the lost foam placing frame and the lost foam mold carried thereby; the measurement unit is carried with a temperature sensor array group;

[0018] The topological circular base formed by all the measurement units is adjusted in diameter by the topological measurement mechanism; the central axis of the "topological circular base" overlaps with the central axis of the lost foam placing frame, and the "topological circular base" can be adjusted in diameter, that is, each measurement unit can synchronously adjust the spacing between itself and the lost foam placing frame, on the one hand, it can adapt to lost foam molds of different sizes, on the other hand, it can adjust the outside of the lost foam mold in different orientations through the form of cyclic diameter adjustment, adjust the detection orientation of the temperature sensor array group to achieve more uniform and comprehensive detection effect;

[0019] Each adjacent molding unit has a spacing b; the spacing a and the spacing b are matched. That is, in use, one molding unit can be inserted into the spacing a between two measurement units to realize the application of vibration force and perform vibration molding work. This design avoids mechanism interference.

[0020] In the above embodiment: the lost foam mold molding device of the engine cylinder body comprises a cylindrical shell and a lost foam placing frame located in the middle of the shell. The lost foam placing frame clamps the casting box of the lost foam mold. A plurality of molding units are arranged in a peripheral ring array, and each adjacent molding unit has a spacing a. Each molding unit has a lifting linear degree of freedom, a feeding linear degree of freedom, and a universal linear degree of freedom, and a vibration source for molding. The lifting linear degree of freedom, the feeding linear degree of freedom, and the universal linear degree of freedom are respectively used to adjust the lifting, feeding, and universal orientation adjustment of the vibration source to the external orientation of the lost foam mold. Through these degrees of freedom, the vibration source applies a vibration force to the outside of the lost foam mold, assisting the molding of the mold.

[0021] In an embodiment, the basic use method of the lost foam mold modeling device of the engine cylinder is to detect the temperature of different positions of the mold by the temperature sensor array group, determine the temperature of different regions, predict the temperature distribution of the mold in the next time step based on the algorithm, and determine the flow of the fluid in the mold. Based on this, the modeling unit is used in advance to adjust the angle and position flexibly, guide the seismic source to output the excitation force to the specified position of the lost foam mold, and realize the modeling operation.

[0022] In an embodiment, the topological measurement mechanism includes a first cylinder and a second cylinder that are slidably connected, the second cylinder is fixed in the shell, and the second cylinder carries a lifting servo cylinder for lifting adjustment of the first cylinder; the first cylinder is uniformly arrayed with the measurement units in a ring array, and when the first cylinder is lifted in the second cylinder, all the measurement units jointly move away from or approach the central axis of the first cylinder.

[0023] In the above embodiment, the topological measurement mechanism is composed of two parts, i.e., the first cylinder and the second cylinder. The second cylinder is fixed in the shell and carries a lifting servo cylinder for lifting adjustment of the first cylinder. The first cylinder is uniformly arrayed with multiple measurement units, which can jointly move away from or approach the central axis of the first cylinder when the first cylinder is lifted.

[0024] In an embodiment, the measurement unit includes a first plate and a second plate that are hingedly connected to each other by a hinge, the first plate is located above, and the second plate is located below, the lower end of the second plate is hingedly connected to the second cylinder, and the hinge frame is hingedly connected to the outside of the first plate and the first cylinder at one end and the other end, respectively; the second plate carries the temperature sensor array group. When the lifting servo cylinder adjusts the lifting of the first cylinder in the second cylinder, the hinge frame hingedly pulls the first plate, the first plate is stressed, and the second plate is hingedly connected to the second plate and kept perpendicular to the central axis of the first cylinder, and the bottom of the second plate is hingedly connected to the second cylinder, eliminating the excess mechanism degrees of freedom. In this way, when the second cylinder is lifted, the topological circle formed by the first plates of all the measurement units realizes the "topological circle".

[0025] In the above embodiment: the measuring unit is composed of two plate bodies, namely the first plate body and the second plate body, which are hinged to each other by a hinge. The first plate body is located above, and the second plate body is located below. The lower end of the second plate body is hinged to the second cylinder body, and one end and the other end of the hinged bracket are hinged to the outside of the first plate body and the first cylinder body, respectively. The second plate body is loaded with an array of temperature sensor groups. When the lifting servo cylinder adjusts the lifting movement of the first cylinder body, the hinged bracket plays a traction role, so that the first plate body is stressed and kept perpendicular to the central axis of the first cylinder body, while the bottom of the second plate body is hinged to the second cylinder body to eliminate the redundant mechanism degrees of freedom. Through this design, when the second cylinder body is lifted, all the first plate bodies of the measuring units form a "topological circle".

[0026] In one embodiment: an electric rotary table module is arranged above the casing, and a plurality of modeling units are arranged in a ring array around the outside of the lost foam placing rack and the lost foam mold carried thereby. The electric rotary table module is used to further adjust the spatial position of each modeling unit, specifically to adjust the overlapping area of the interval b and the interval a, so as to further control the spatial orientation of the vibration source and further adjust and adapt the vibration modeling of the mold.

[0027] In the above embodiment: an electric rotary table module is arranged above the casing, and a plurality of modeling units are arranged in a ring array around the outside of the lost foam placing rack and the lost foam mold carried thereby. The electric rotary table module is used to further adjust the spatial position of each modeling unit. Specifically, it can adjust the overlapping area of the interval b and the interval a to further control the spatial orientation of the vibration source and further adjust and adapt the vibration modeling of the mold.

[0028] In one embodiment: the modeling unit comprises a lifting module for outputting the lifting linear degree of freedom, a macro adjustment module for outputting the feeding linear degree of freedom, and a micro adjustment module for outputting the universal linear degree of freedom; the lifting module is used to adjust the height orientation of the macro adjustment module, the macro adjustment module is used to adjust the feeding distance of the micro adjustment module, and the micro adjustment module is loaded with the vibration source, which is preferably a vibration motor.

[0029] In the above-mentioned embodiments: the modeling unit includes three key components: a lifting module, a macro-motion adjustment module, and a micro-motion adjustment module. These components are respectively used to realize the adjustment of the lifting linear degree of freedom, the feeding linear degree of freedom, and the universal linear degree of freedom. The lifting module is responsible for adjusting the height orientation of the macro-motion adjustment module, the macro-motion adjustment module is responsible for adjusting the feeding distance of the micro-motion adjustment module, and the micro-motion adjustment module is mounted with a vibration source, preferably a vibration motor as the vibration source.

[0030] In one embodiment: the micro-motion adjustment module includes two mutually opposite disc bodies, and at least three linear actuators for collectively outputting the universal linear degree of freedom are arranged in a ring array between the two disc bodies, and the linear actuators are connected to one side opposite to the two disc bodies; the vibration motor is mounted on one of the disc bodies.

[0031] In the above-mentioned embodiments: the micro-motion adjustment module includes two opposite disc bodies, and at least three linear actuators for collectively outputting the universal linear degree of freedom are arranged in a ring array between the two disc bodies.

[0032] In one embodiment: the linear actuator is preferably a second servo cylinder, and the cylinder body and piston rod of the second servo cylinder are respectively hinged to the respective side of the two disc bodies opposite to each other through a universal joint coupling.

[0033] In the above-mentioned embodiments: the selection of the linear actuator gives priority to the second servo cylinder as the linear actuator. The cylinder body and piston rod of the second servo cylinder are respectively hinged to the respective side of the two opposite disc bodies through a universal joint coupling.

[0034] In one embodiment: the macro-motion adjustment module includes a first frame body, a second frame body hinged to the first frame body, and a first servo cylinder with a cylinder body and a piston rod respectively hinged to the first frame body and the second frame body. The second frame body is fixed with the disc body in the micro-motion adjustment module that does not carry the vibration motor.

[0035] In the above-mentioned embodiments: the macro-motion adjustment module is composed of several main parts, including a first frame body, a second frame body hinged to the first frame body, and a first servo cylinder with a cylinder body and a piston rod respectively hinged to the first frame body and the second frame body. The second frame body is mounted with the disc body in the micro-motion adjustment module that does not carry the vibration motor.

[0036] In one embodiment, the lifting module includes a truss, a lifting platform vertically slidingly fitted to the truss, a transmission belt assembly arranged on a sliding surface between the lifting platform and the truss, and a servo motor for driving the transmission belt assembly to perform lifting adjustment operation. The transmission belt of the transmission belt assembly is fixed to the lifting platform, and when the servo motor drives the driving wheel of the transmission belt assembly to rotate, the transmission belt drives the lifting platform to perform lifting adjustment operation along the truss. The first frame body of the macro adjustment module is installed on the truss.

[0037] In the above embodiment, the lifting module is composed of several main components, including a truss, a lifting platform vertically slidingly fitted to the truss, a transmission belt assembly installed on a sliding surface between the lifting platform and the truss, and a servo motor for driving the transmission belt assembly to perform lifting adjustment operation. The transmission belt of the transmission belt assembly is fixed to the lifting platform, and when the servo motor drives the driving wheel of the transmission belt assembly to rotate, the transmission belt drives the lifting platform to perform lifting adjustment operation along the truss. The first frame body of the macro adjustment module is installed on the truss.

[0038] Second aspect

[0039] A lost foam mold molding casting method of an engine cylinder block is executed by using the lost foam mold molding device as described above, and the following steps are performed:

[0040] S1, execute cellular automata: each temperature sensor in the temperature sensor array group of each measurement unit corresponds to detect a specific region of the lost foam mold, and each temperature sensor in all temperature sensor array groups comprehensively detects the temperature distribution of the lost foam mold, and the region is regarded as a cell i;

[0041] S2, cell i definition: each cell i has a temperature Ti attribute, defines a Moore neighborhood Ni, defines a transition function to execute the transition of each cell i in the Moore neighborhood at the next time step, and the transition function follows the three-dimensional Fourier law; each cell i outputs a rate prediction value at the next time step ;

[0042] S3, predict fluid flow conditions: define a rate threshold RV (watt / ㎡), which is an actual rate parameter of the metal fluid used for casting; when the rate prediction value is lower than the rate threshold RV, execute S4;

[0043] S4, pre-shock molding: the molding unit 4 carries the shock source to the rate prediction value below the rate threshold RV, the corresponding cell i, i.e. the specific area of the corresponding lost foam mold, performs the vibration force Fi output to carry out the vibration molding operation; during which the corresponding temperature sensor in the temperature sensor array group feeds back the conversion of the cell i in real time, and when the rate prediction value of the cell i is below the rate threshold RV above the rate threshold RV, the molding unit resets;

[0044] S5, cyclically executing S1-S4.

[0045] In the above implementation: based on the concept of cellular automata, where each cell represents a specific area of the lost foam mold and has a temperature attribute Ti. The temperature distribution of the lost foam mold is monitored through a temperature sensor array group. The cells are connected to each other through the Moore neighborhood Ni, and the rate prediction value of each cell at the next time step is predicted through the transition function according to the three-dimensional Fourier law .

[0046] Wherein in an embodiment: in the S2:

[0047] 1) Assign the initial state of the temperature Ti of each cell as Ti0, the Moore neighborhood Ni as a cube, the cube including the cell i itself and all adjacent cells around it, the Moore neighborhood Ni including:

[0048] ;

[0049] Where ic, jc, kc are the coordinates of cell i;

[0050] Each cell i has an initial temperature Ti0 and a Moore neighborhood Ni associated with it, which can be used for subsequent temperature gradient calculation and rate prediction.

[0051] 2) The transition function includes:

[0052] 2.1) For each cell i, the following steps are performed:

[0053] Calculate the temperature gradient of the cell i , using the temperature value difference calculation within the Moore neighborhood Ni:

[0054] ;

[0055] j represents a neighboring cell in the Moore neighborhood Ni of cell i, Tj represents the temperature of the neighboring cell j, (Tj - Ti) represents the temperature difference between the neighboring cell j and the cell i, which is used to calculate the temperature gradient;

[0056] 2.2) Calculate the rate prediction value for the next time step using Fourier's law

[0057]

[0058] k is the thermal conductivity, representing the material's heat conduction performance;

[0059] is the density, representing the fluid's density;

[0060] q is the heat conduction vector, representing the direction and rate of heat transfer.

[0061] In the above implementation: In S2.1, each cell i is initialized. Each cell has an initial temperature Tio, and its associated Moore neighborhood Ni is a cube that includes the cell i itself and all adjacent cells around it. The boundary of the Moore neighborhood is defined by the coordinates ic, jc and kc, which represent the position of cell i. The initial temperature and neighborhood information will be used in subsequent calculations.

[0062] In the above implementation: Temperature gradient calculation, for each cell i, the temperature gradient is calculated. This is calculated by using the difference of temperature values within the Moore neighborhood Ni. represents the sum, j represents a neighboring cell in the Moore neighborhood Ni of cell i, Tj represents the temperature of neighboring cell j, (Tj - Ti) represents the temperature difference between neighboring cell j and cell i, and |Ni| represents the number of elements in the Moore neighborhood. The calculated temperature gradient will be used in subsequent rate prediction calculations.

[0063] where in one implementation: In said S4: the magnitude of said shaking force Fi is calculated as:

[0064]

[0065] A is the material property parameter, representing the degree of response of the material to the shaking force. Different materials have different A values, and the value of A can be obtained from existing mechanical manuals or standardized manuals of fluid mechanics of materials to describe their vibration characteristics.

[0066] In the above implementation: This shaking force helps to improve the fluid flow inside the lost foam mold, thereby improving the uniformity and quality of the casting process. This implementation allows the size of the shaking force to be automatically adjusted according to the material property parameter and the rate prediction, to adapt to different casting conditions and requirements. This precise control helps to reduce defects in casting and improve the quality of the final casting.

[0067] ​​​Compared with the prior art, the present application has the following advantages:

[0068] (1) Precision improvement: The technology provided by the present application uses temperature sensors to monitor the temperature distribution inside the mold in real time, and predicts the flow rate value through cellular automata calculation, thereby achieving precise control of fluid flow. This ensures high precision in the casting process, helping to reduce defects in the castings. Based on the prediction ability of temperature distribution, the fluid flow situation can be predicted in advance, and appropriate control can be made to ensure the casting quality.

[0069] (2) Uniformity improvement: By applying precise vibration force in specific areas, the technology provided by the present application improves the uniformity of the castings. The fluid flow in different areas is homogenized, reducing the unevenness and defects in the castings, thereby improving the quality. The temperature sensor array monitors the temperature distribution in real time and feeds back to the system, so that adjustments can be made in time during the casting process, reducing the uncertainty in production.

[0070] (3) Strong adaptability: The technology provided by the present application can adjust the size and position of the vibration force in real time to adapt to the changes of the fluid inside the mold. This adaptability makes the casting process better cope with sudden situations and changes in material properties, improving stability. Through flexible angle and orientation adjustment, the technology provided by the present application is suitable for different sizes and complex structure of the lost foam mold. This enhances the versatility and adaptability of the technology.

[0071] (4) Energy efficiency improvement: The technology provided by the present application adjusts the size of the vibration force dynamically to adapt to different flow situations, reducing energy waste and improving energy efficiency. At the same time, the automation degree of the present application is high, reducing the demand for human operation and reducing the error caused by human intervention. BRIEF DESCRIPTION OF DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0073] Figure 1 is a perspective view of the present application.

[0074] Figure 2 is another perspective view of the present application.

[0075] Figure 3 is a perspective view of the cooperation of the topological measurement mechanism in the casing.

[0076] Figure 4 Top view schematic diagram of the topography measuring mechanism in the casing of the present application.

[0077] Figure 5 Perspective view schematic diagram of the position cooperation of the molding unit and the topography measuring mechanism of the present application.

[0078] Figure 6 Perspective view schematic diagram of the topography measuring mechanism of the present application.

[0079] Figure 7 Front view schematic diagram of the position cooperation of the molding unit and the topography measuring mechanism of the present application.

[0080] Figure 8 Perspective view schematic diagram of the molding unit of the present application.

[0081] Figure 9 Perspective view schematic diagram of the micro-motion adjusting module in the A area of the present application. Figure 8

[0082] Figure 10 Schematic diagram of the cell distribution detected by the temperature sensor array group outside the casting box of the present application.

[0083] Figure 11 Control program schematic diagram of the third embodiment of the present application.

[0084] Figure 12 Control program schematic diagram of the third embodiment of the present application.

[0085] Figure 13 Control program schematic diagram of the third embodiment of the present application.

[0086] Figure 14 Control program schematic diagram of the third embodiment of the present application.

[0087] Reference signs: 1, casing; 2, lost foam placing rack; 3, electric rotary table module; 4, molding unit; 401, lifting module; 4011, truss; 4012, servo motor; 4013, transmission belt assembly; 4014, lifting table; 402, macro-motion adjusting module; 4021, first rack body; 4022, second rack body; 4023, first servo cylinder; 403, micro-motion adjusting module; 4031, disc body; 4032, linear actuator; 4033, seismic source; 5, topography measuring mechanism; 501, first cylinder body; 502, second cylinder body; 503, lifting servo cylinder; 504, measuring unit; 5041, hinged rack; 5042, first plate body; 5043, second plate body; 505, temperature sensor array group; DETAILED DESCRIPTION

[0088] ​In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that similar improvements can be made by those skilled in the art in light of the foregoing description. Therefore, the present application is not limited to the following disclosed specific embodiments;

[0089] It should be noted that the terms "first", "second", "symmetrical", "array" and the like are only used to distinguish the description and the position description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "symmetrical" and the like can be explicitly or implicitly included one or more features; similarly, for some features which are not limited in number by the words "two", "three" and the like, it should be noted that the features also belong to explicitly or implicitly include one or more feature numbers.

[0090] It should be noted that the terms "freedom" refer to the connection relationship of at least one component and the relationship of the applied force, for example, "linear freedom" refers to the connection of a component to another component or more components through the linear freedom and the application of force to the component, so that it can be slidably connected or applied in a straight line direction; "rotational freedom" refers to the ability of a component to rotate freely around at least one rotation axis, and can apply torque or withstand torque.

[0091] In the present application, unless otherwise specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature; at the same time, all axial descriptions such as X axial, Y axial, Z axial, one end of X axial, the other end of Y axial or the other end of Z axial, etc. are based on the Cartesian coordinate system.

[0092] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense; for example, it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected, it can be directly connected, it can be welded, it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specification and drawings in combination with specific circumstances.

[0093] Embodiment one

[0094] In the prior art, the vibration molding operation of the lost foam mold is a process for assisting the flow of fluid to ensure the quality of casting; and the traditional manual vibration molding technology has the technical defects of lack of precision and self-adaptability, insufficient uniformity, inability to adjust in real time, limitation of manufacturing of complex structures and low energy consumption efficiency; therefore, please refer to Figures 1-9 , the present embodiment will provide relevant technical solutions to solve the above technical problems: a lost foam mold molding device for engine cylinder body, comprising: a cylindrical shell 1 and a lost foam placing rack 2 arranged in the middle of the shell 1, the casting box (hereinafter referred to as "mold") of the lost foam mold is clamped on the lost foam placing rack 2; a plurality of molding units 4 are arranged in the form of annular array around the outside of the lost foam placing rack 2 and the lost foam mold carried thereon, and each adjacent molding unit 4 has a spacing a; the molding unit 4 includes a lifting linear degree of freedom, a feeding linear degree of freedom and a universal linear degree of freedom, and a seismic source 4033 for molding, the lifting linear degree of freedom, the feeding linear degree of freedom and the universal linear degree of freedom are respectively used to adjust the lifting, feeding and universal orientation adjustment of the seismic source 4033 to the external orientation of the lost foam mold; based on this, the seismic source 4033 applies a vibration force to the outside of the lost foam mold to assist the casting molding of the mold.

[0095] Further comprising a topological measurement mechanism 5 arranged outside the lost foam placing rack 2 and the lost foam mold carried thereby, the topological measurement mechanism 5 is provided with a plurality of measurement units 504 in the form of a ring array around the outside of the lost foam placing rack 2 and the lost foam mold carried thereby; the measurement units 504 are carried with a temperature sensor array group 505; the topological circular base formed by all the measurement units 504 is adjusted in diameter by the topological measurement mechanism 5; the central axis of this "topological circle" overlaps with the central axis of the lost foam placing rack 2, and this "topological circle" can be adjusted in diameter, that is, each measurement unit 504 can synchronously adjust the spacing between itself and the lost foam placing rack 2, which can adapt to lost foam molds of different sizes on the one hand, and can adjust the outside of the lost foam mold in different directions through cyclic diameter adjustment, so as to adjust the detection direction of the temperature sensor array group 505 to achieve more uniform and comprehensive detection effect;

[0096] In the present scheme, please refer to Figure 7 , each adjacent modeling unit 4 has a spacing b; the spacing a and the spacing b are matched. That is, in use, one modeling unit 4 can be inserted into the spacing a between two measurement units 504 (see the frame line indicated by the B area in the figure), to realize the application of vibration force and perform vibration modeling work, which avoids mechanism interference.

[0097] In the present scheme, all electrical elements of the device as a whole rely on commercial power for energy supply; specifically, the electrical elements of the device as a whole are connected to the commercial power output port through relays, transformers, button panels and other devices for conventional electrical connection, to meet the energy supply needs of all electrical elements of the device.

[0098] Specifically, the device is further provided with a controller for connecting and controlling all electrical elements of the device as a whole to be driven according to the pre-set program as a pre-set value and driving mode; it should be noted that the above driving mode corresponds to the corresponding start-stop time interval, rotation speed, power and other output parameters between the related electrical elements in the following, that is, it meets the needs of the related electrical elements driving the related mechanical devices to operate according to the functions described in the following.

[0099] Specifically: the principle of this device is based on multiple modeling units 4, each having multiple degrees of freedom, to accurately control the position and movement of the vibration source 4033. These degrees of freedom include lifting, feeding and universal orientation adjustment. The vibration source 4033 can apply vibration force to the lost foam mold in multiple directions through these adjustments. Such vibration force helps to reduce bubbles and pores in the casting, promotes uniform filling of the metal, and improves the density and surface quality of the casting. In addition, the vibration force also helps to reduce the formation of solidification shrinkage holes, further improving the quality of the parts.

[0100] It can be understood that in the scheme provided by the embodiment: the functionality of this device is to provide high control and adaptability for the casting of the lost mold. By adjusting the lifting, feeding and universal freedom degrees in the modeling unit 4, the operator can accurately control the position and movement of the seismic source 4033 to meet the requirements of lost molds of different shapes and sizes. This helps to improve production efficiency and part quality. In addition, equipped with topological measurement mechanism 5 and temperature sensor array, the temperature distribution of the mold can be monitored and adjusted in real time, ensuring more uniform and comprehensive detection effect. Through adaptive design, this device can provide high-quality casting molding under different production needs, while avoiding the problem of mechanism interference.

[0101] In some embodiments of the application, please refer to Example II: The basic use method of the lost mold modeling device of the engine cylinder body is based on the infrared detection of the temperature sensor array group 505 on the different directions of the mold outside, to determine the temperature situation of different areas, and predict the temperature distribution of the mold in the next time step based on the algorithm, that is, to determine the flow situation of the fluid inside the mold. Based on this, the modeling unit 4 is used in advance to make flexible angle and position adjustment, guiding the seismic source 4033 to output excitation force to the specified direction of the lost mold outside, realizing the modeling operation.

[0102] Specifically: based on the ability of the temperature sensor array group 505, it can detect the temperature change of the mold outside in different directions. Temperature is an indicator closely related to fluid flow, so through temperature data, the distribution of fluid in the mold can be inferred. Algorithm analyzes these temperature data and considers the time change trend, which can predict the future temperature distribution of the mold. This information provides insight into the behavior of the fluid, such as flow rate, liquid phase distribution, etc., which helps to determine appropriate modeling unit 4 adjustments.

[0103] It can be understood that in the scheme provided by the embodiment: the functionality of this method is to realize intelligent mold control, through real-time monitoring and analysis of temperature data, the device can predict the temperature distribution and fluid flow inside the mold, thereby realizing more accurate modeling operation. This accuracy means that defects such as uneven flow, bubbles, pores and solidification shrinkage can be avoided, improving the quality of the casting. By using the angle and position adjustment of the modeling unit 4, the seismic source 4033 can be guided to act on the specified external direction of the lost mold in the form of excitation force, ensuring the required casting effect. This method not only improves production efficiency, but also reduces waste, providing key support for high-quality engine cylinder body production.

[0104] In some embodiments of the application, please refer to Figure 6The topological measurement mechanism 5 includes a first cylinder 501 and a second cylinder 502 that slide up and down. The second cylinder 502 is fixed in the casing 1 and carries a lifting servo cylinder 503 for lifting and adjusting the first cylinder 501. The first cylinder 501 is uniformly arrayed with measurement units 504 in a ring array. When the first cylinder 501 is lifted or lowered in the second cylinder 502, all the measurement units 504 jointly move away from or approach the central axis of the first cylinder 501.

[0105] In the scheme provided in this embodiment, the topological measurement mechanism 5 is composed of two parts, namely the first cylinder 501 and the second cylinder 502. The second cylinder 502 is fixed in the casing 1 and carries a lifting servo cylinder 503 for lifting and adjusting the first cylinder 501. The first cylinder 501 is uniformly arrayed with measurement units 504. When the first cylinder 501 is lifted or lowered, all the measurement units 504 jointly move away from or approach the central axis of the first cylinder 501.

[0106] Specifically, the height adjustment of the measurement units 504 is achieved by using the lifting servo cylinder 503 between the first cylinder 501 and the second cylinder 502. When the cylinder 503 is operated, the first cylinder 501 can be lifted or lowered, thereby changing the distance between the measurement units 504 and the mold. This height adjustment is crucial because it allows the measurement units 504 to maintain an appropriate distance from the different sizes and shapes of the lost foam mold, ensuring that the temperature sensor array group 505 accurately detects the temperature changes outside the mold.

[0107] It can be understood that in the scheme provided in this embodiment, an adjustable topological measurement mechanism 5 is provided, which can adapt to different sizes and shapes of the lost foam mold. Through the operation of the lifting servo cylinder 503, the device can adjust the height of the measurement units 504 under different production requirements, ensuring that the temperature sensor array group 505 can always correctly detect the temperature changes outside the mold. The adjustability and accuracy of this mechanism help to improve the accuracy of temperature data, and thus improve the monitoring and control of the mold state. This is crucial for ensuring the quality and production efficiency of castings, especially when producing cast parts of different specifications and shapes. By automatically adjusting the height of the measurement units, interference of the mechanism can be avoided, and comprehensive and uniform temperature detection can be achieved.

[0108] In some specific embodiments of the present application, please refer to Figure 5 and 6The measurement unit 504 includes a first plate body 5042 and a second plate body 5043 hingedly connected to each other by a hinge, with the first plate body 5042 located above and the second plate body 5043 located below. The lower end of the second plate body 5043 is hingedly connected to the second cylinder body 502, and one end and the other end of the hinge bracket 5041 are hingedly connected to the outside of the first plate body 5042 and the first cylinder body 501, respectively. The second plate body 5043 carries a temperature sensor array group 505. When the lifting servo cylinder 503 adjusts the first cylinder body 501 to rise and fall in the second cylinder body 502, the hinge bracket 5041 is hingedly connected to pull the first plate body 5042, and the first plate body 5042 is forced to be hingedly connected to the second plate body 5043 and remain perpendicular to the central axis of the first cylinder body 501. The bottom of the second plate body 5043 is hingedly connected to the second cylinder body 502, eliminating the excess degree of freedom of the mechanism. In this way, when the second cylinder body 502 rises and falls, the topological circle formed by the first plate body 5042 of all measurement units 504 realizes "topological circle".

[0109] In the scheme provided in this embodiment: the hinged structure and the lifting servo cylinder 503 are used to realize the height adjustment of the measurement unit 504. When the cylinder 503 operates, the hinge bracket 5041 transmits force to the first plate body 5042, making it remain perpendicular to the central axis of the first cylinder body 501. At the same time, the bottom of the second plate body 5043 is hingedly connected to the second cylinder body 502, ensuring that the overall height of the measurement unit 504 changes with the rise and fall of the first cylinder body 501. The linkage of this hinged and lifting mechanism helps to eliminate the excess degree of freedom, so that the measurement unit 504 remains in the correct position relative to the mold when adjusting the height, thereby ensuring that the temperature sensor array group 505 can accurately detect the temperature changes outside the mold.

[0110] Further, the arrangement of topological circles ensures that the entire outside of the lost foam mold is covered by the measurement unit 504. This means that the temperature sensor array group 505 can comprehensively monitor the temperature conditions outside the mold and will not miss any area. Therefore, for the cellular automaton, it can calculate the rate prediction value based on complete temperature data, realizing comprehensive simulation and control. At the same time, the construction of topological circles allows the measurement unit 504 to adjust its own spacing relative to the lost foam holder 2 only by relying on the input of the single linear degree of freedom of the lifting servo cylinder 503. This feature makes it possible for this technology to adapt to lost foam molds of different sizes. In addition, through the way of circulating variable diameter, different directions of the outside of the lost foam mold can be adjusted to adapt to molds of different shapes and structures.

[0111] Further, the topological circular arrangement of the measurement units 504 establishes a close connection with the cellular automaton in Embodiment Two. Each measurement unit 504 provides real-time feedback on the temperature conditions in its respective area, and these data are used for rate prediction and control by the cellular automaton. Therefore, regardless of how the temperature distribution changes, the system can quickly respond and adjust the corresponding vibration force, achieving adaptive control of fluid flow. At the same time, the topological circular arrangement of the measurement units 504 increases the density of the temperature sensor array group 505, providing high-resolution temperature data. This helps the cellular automaton to more accurately simulate the temperature distribution inside the mold, thereby improving the precision control of fluid flow.

[0112] Specifically, the temperature distribution during the casting process can change rapidly, especially during the process of fluid flow in the lost foam mold. In order to ensure real-time control and accurate control of fluid flow, timely acquisition of temperature data is required. Real-time feedback on temperature conditions allows the system to continuously monitor and respond to changes to meet the requirements of casting quality. The cellular automaton of Embodiment Two relies on temperature data to calculate rate prediction values, which are used to determine whether to apply a vibration force to adjust fluid flow. Temperature is one of the key factors in controlling fluid flow, as the temperature distribution directly affects the viscosity, density, and thermal conductivity of the fluid. By monitoring the temperature conditions in real time, the cellular automaton can accurately predict the fluid velocity in different areas for corresponding control. Changes in temperature distribution can cause unevenness in fluid flow rate, resulting in defects or quality problems. Through real-time feedback, the system can quickly identify changes in temperature distribution and adjust the corresponding vibration force. This adaptive adjustment ensures the stability and consistency of the casting process, reducing the risk of waste. Temperature is one of the important factors affecting the casting process, and it is crucial for maintaining the accuracy and uniformity of fluid flow. Real-time feedback on temperature conditions helps to provide high-precision control to avoid the occurrence of overheated or undercooled areas, thereby reducing defects and waste.

[0113] It can be understood that in the scheme provided in the present embodiment: through the cooperation of the hinged design and the electric cylinder, the device can ensure that the temperature sensor array group 505 always remains in the correct position to accurately detect the temperature changes outside the mold. This helps to achieve comprehensive and uniform temperature detection, improving the accuracy of mold condition monitoring. Through adaptive design, this mechanism can be applied to lost foam molds of different sizes and shapes, thereby supporting the production of casting parts of different specifications. By eliminating redundant degrees of freedom, it can also avoid mechanical interference and ensure the stable operation of the measurement units 504. This helps to improve the quality and production efficiency of the castings.

[0114] It is important to note that in the scheme provided by the present embodiment: the lost foam mold is essentially treated as a three-dimensional Fourier fluid model, which means that the fluid behavior during casting can be described through mathematical modeling, similar to the three-dimensional Fourier equation used to analyze the heat conduction, velocity distribution, etc. of the fluid. Through the ring array arrangement of the measurement units 504 of the topological measurement mechanism 5 and the synchronous adjustment mode, multiple dimensions of mutual support can be provided for the process of coupling the cellular automaton model to the three-dimensional Fourier fluid model; Specifically:

[0115] (1) The lost foam mold as a three-dimensional Fourier fluid model: the fluid behavior inside the lost foam mold is consistent with the basic principles of the three-dimensional Fourier fluid model. The Fourier equation describes how heat transfer and velocity distribution are affected by temperature gradients and material properties. In this technology, by monitoring the temperature distribution in real time and calculating based on these data, the fluid behavior inside the lost foam mold is actually modeled as a three-dimensional Fourier fluid model.

[0116] (2) The ring array arrangement of the topological measurement mechanism 5: one of the key roles of the topological measurement mechanism 5 is to arrange the measurement units 504 in a ring array. The advantage of this layout is that it can provide multi-dimensional support. The ring array arrangement of multiple measurement units 504 can simultaneously monitor different parts of the lost foam mold to obtain comprehensive temperature data. This multi-dimensional support enables the cellular automaton model to more accurately reflect the temperature distribution and fluid behavior inside the lost foam mold.

[0117] (3) The importance of the synchronous adjustment mode: the first beneficial effect of the synchronous adjustment mode is that it allows the spacing and position between the measurement units 504 to be adjusted in real time to adapt to lost foam molds of different sizes and shapes. This is very important because different molds may have different geometric structures and sizes that require individualized control. Through the synchronous adjustment mode, it is ensured that the measurement units 504 can provide accurate temperature data in different situations to support the simulation and control of the cellular automaton.

[0118] (4) Clear cellular relationship: the second beneficial effect of the synchronous adjustment mode is that it helps to clearly define the Moore neighborhood relationship of the cellular automaton. The Moore neighborhood is a set of adjacent cells in the cellular automaton model used to calculate the state of the cell. Through the ring array arrangement, it is clear to define which cells are adjacent, the three-dimensional distribution relationship of adjacent cells on other surfaces, etc., so that it is easier to establish the relationship between cells, calculate the temperature gradient and predict the velocity.

[0119] In some specific embodiments of the present application, please refer to Figure 2 , 5And 7: An electric rotating table module 3 is provided above the housing 1. The electric rotating table module 3 is arranged in a ring array around the lost foam placing rack 2 and the lost foam mold carried thereon, and is provided with a plurality of modeling units 4. The function of the electric rotating table module 3 is to further adjust the spatial position of each modeling unit 4. Specifically, it adjusts the overlapping area of the interval b and the interval a, which can further control the spatial orientation of the vibration source 4033, and further adjust and adapt the vibration modeling of the mold.

[0120] In the scheme provided in the embodiment, the main function of the electric rotating table module 3 is to adjust the spatial position of each modeling unit 4. Specifically, it can adjust the overlapping area of the interval b and the interval a to further control the spatial orientation of the vibration source 4033, thereby further adjusting and adapting the vibration modeling of the mold.

[0121] Specifically, the electric rotating table module 3 can change the spatial position of the modeling unit 4 by rotating. By adjusting the angle of the rotating table module, the relative position of the vibration source outside the mold can be changed, thereby affecting the direction and strength of the vibration force. This rotation adjustment helps to further accurately control the vibration modeling of the mold to adapt to different production needs and mold shapes.

[0122] Further, the electric rotating table module 3 includes a ring-shaped frame and a circular ring that rotates in cooperation with it. The circular ring is driven to rotate by a motor, and the bottom of the circular ring is uniformly provided with modeling units 4 in a ring array.

[0123] It can be understood that in the scheme provided in the embodiment, additional spatial position adjustment is provided. Through the electric rotating table module 3, the position and angle of the modeling unit 4 can be further changed, thereby adjusting the spatial orientation of the vibration source. This adjustment can achieve more accurate vibration modeling of the mold, which helps to further improve the quality and production efficiency of the castings. By controlling the direction of the vibration force, problems that may cause casting defects such as bubble, blowhole or solidification shrinkage can be avoided. This high adjustability and adaptability enables the device to cope with various lost foam molds of different shapes and sizes, ensuring the accuracy and consistency of the casting process. At the same time, this adjustment also helps to avoid mechanism interference and maintain the stability of the mold.

[0124] In some specific embodiments of the present application, please refer to Figure 5 , 7, 8 and 9: the modeling unit 4 includes a lifting module 401 for outputting the lifting linear degree of freedom, a macro-adjustment module 402 for outputting the feeding linear degree of freedom, and a micro-adjustment module 403 for outputting the universal linear degree of freedom; the lifting module 401 is used for adjusting the height orientation of the macro-adjustment module 402, the macro-adjustment module 402 is used for adjusting the feeding distance of the micro-adjustment module 403, and the micro-adjustment module 403 is loaded with a vibration source 4033, which is preferably a vibration motor.

[0125] In the scheme provided in the embodiment: the modeling unit 4 includes three key components: the lifting module 401, the macro-adjustment module 402, and the micro-adjustment module 403. These components are respectively used for realizing the adjustment of the lifting linear degree of freedom, the feeding linear degree of freedom, and the universal linear degree of freedom. The lifting module 401 is responsible for adjusting the height orientation of the macro-adjustment module 402, the macro-adjustment module 402 is responsible for adjusting the feeding distance of the micro-adjustment module 403, and the micro-adjustment module 403 is loaded with a vibration source 4033, which is preferably a vibration motor.

[0126] Specifically: the principle lies in the hierarchical adjustment mechanism, in which each module is responsible for a different linear degree of freedom. The lifting module 401 controls the height orientation of the macro-adjustment module 402, and by changing the position of the macro-adjustment module 402, the lifting adjustment of the mold can be realized. The macro-adjustment module 402 is responsible for adjusting the feeding distance of the micro-adjustment module 403, and through this adjustment, the distance between the vibration source 4033 and the mold can be changed, thereby controlling the strength of the vibration force. The micro-adjustment module 403 is loaded with a vibration source 4033, which is usually a vibration motor, to generate a vibration force, which is transmitted to the expendable mold for realizing the modeling operation.

[0127] Further, hierarchical control allows precise adjustment of movement in different directions. The lifting module 401 is responsible for vertical movement, the macro-adjustment module 402 is used for horizontal adjustment, and the micro-adjustment module 403 provides more subtle movement control. This hierarchical structure enables the modeling unit 4 to control the vibration molding of the expendable mold with different levels of precision to adapt to different casting requirements and mold shapes.

[0128] Further, the macro-motion adjustment module 402 is responsible for adjusting the position of the molding unit 4 in the horizontal direction. The main role of this mode is to fine-tune the overall position, ensuring that the vibration force can be accurately applied to the target area. The macro-motion mode is achieved by controlling the movement of the macro-motion module, which can be used for large-scale position adjustment. The micro-motion adjustment module 403 is located above the macro-motion adjustment module 402 and is responsible for more precise motion control. The micro-motion mode is achieved through linear actuators 4032 and vibration motors, which can provide small movements for fine adjustment of the vibration force. The role of this mode is to make small corrections based on the macro-motion mode to ensure that the final vibration molding is very accurate and uniform.

[0129] Further, since the casting mold and the workpiece may have different sizes and shapes, flexible adjustment of the molding unit 4 is required. The combination of hierarchical control and macro-motion mode and micro-motion mode enables the molding unit 4 to adapt to different size and shape of the expendable pattern mold without major mechanical changes. This improves the versatility and applicability of the device. Through hierarchical control and combination of different modes, it can be ensured that the vibration force is accurately and uniformly applied to the mold during casting. This helps to reduce defects and unevenness in the casting process, improving the casting quality and consistency of the finished workpiece.

[0130] It can be understood that in the scheme provided in the embodiment: a multi-level control is provided to adapt to different molding requirements. Through the cooperation of the lifting module 401, the macro-motion adjustment module 402 and the micro-motion adjustment module 403, the height, position and vibration force of the expendable pattern mold can be accurately controlled. This accuracy is very important for the casting process, as it can ensure that the metal material uniformly fills the mold, reduces the generation of bubbles and pores, and improves the density of the casting. In addition, by using a vibration motor as a vibration source 4033, high-frequency vibration force can be generated, which better adapts to different materials and mold shapes. Therefore, this device can improve production efficiency, reduce waste rate and ensure the quality of the cast parts.

[0131] In some specific embodiments of the present application, please refer to Figure 9 : The micro-motion adjustment module 403 includes two mutually opposed disc bodies 4031, and at least three linear actuators 4032 for collectively outputting universal linear degrees of freedom are arranged in an annular array between the two disc bodies 4031, and the linear actuators 4032 are connected to one side opposite to the two disc bodies 4031; a vibration motor is installed on one of the disc bodies 4031.

[0132] Specifically, the combination of two opposing disc bodies 4031 and linear actuators 4032 is used. Through the ring array arrangement of linear actuators 4032, the precise control of the feeding direction of the micro-adjustment module 403 can be achieved. The linear actuators 4032 are connected to one side of the two disc bodies 4031, and through their coordinated movement, the position and angle of the vibration motor can be changed, thereby adjusting the direction of the vibration force.

[0133] It can be understood that in the scheme provided in the embodiment, by using multiple linear actuators 4032, the micro-adjustment module 403 can adjust the position of the vibration motor in different directions to adapt to different shapes and sizes of the lost foam mold. This precision and multi-directional adjustment helps to ensure uniform filling of the mold during casting, reducing the generation of bubbles and pores, and improving the density and quality of the castings. In addition, by using the vibration motor, high-frequency vibration force can be generated, which helps to better adapt to different materials and mold shapes. Therefore, this device can improve production efficiency, reduce waste, and ensure high quality of cast parts.

[0134] Further, the micro-adjustment module 403 can achieve precise directional control of the vibration force by adjusting the angle of the vibration motor. This means that during molding, the vibration force can be accurately applied to specific areas of the mold to achieve fine molding and higher casting quality. The form of universal angle adjustment allows the micro-adjustment module 403 to adapt to different molding needs. According to the specific shape and requirements of the workpiece, the angle of the vibration motor can be adjusted to ensure the best molding effect. Through precise angle adjustment, energy waste and defective rates can be minimized. Traditional fixed or irregular dynamic excitation may result in energy waste and uneven molding, thereby increasing the defective rate. The micro-adjustment module 403 can reduce such waste, improving resource utilization and production efficiency.

[0135] Further, by adjusting the angle of the vibration motor in a cyclic manner, more uniform vibration distribution can be achieved. This is because different parts of the mold may require different vibration directions and intensities, and the micro-adjustment module 403 can make small adjustments in different directions to ensure that the vibration is evenly transmitted to the entire mold surface. Since the micro-adjustment module 403 can adjust the angle of the vibration motor in real time, it is self-adapting. This means that during the casting process, if the shape or requirements of the mold change, the system can immediately make adjustments without the need for downtime or major mechanical changes.

[0136] In some specific embodiments of the present application, please refer to Figure 9The linear actuator 4032 is preferably a second servo cylinder, with its cylinder body and piston rod respectively hinged to the mutually opposite respective faces of the two disc bodies 4031 through universal joint couplings.

[0137] Specifically, based on the use of the second servo cylinder, it is designed as a linear actuator 4032 to control the feeding direction of the micro-adjustment module 403. The cylinder body and piston rod are connected to the two opposite disc bodies 4031 through universal joint couplings, and this hinged mechanism allows the movement of the electric cylinder to be effectively transmitted to the micro-adjustment module 403. By adjusting the position of the piston rod of the second servo cylinder, the position and direction of the vibration motor can be changed, thereby controlling the direction and intensity of the vibration force.

[0138] It can be understood that in the scheme provided in the embodiment, the use of the second servo cylinder as the linear actuator 4032 realizes the precise control of the direction of the vibration force. Through the movement of the electric cylinder, the position of the piston rod can be changed, so as to adjust the position and angle of the vibration motor to adapt to different lost foam mold shapes and sizes. This precision and controllability helps to ensure that the molten metal uniformly fills the mold during casting, reducing the generation of bubbles and pores, and improving the compactness and quality of the castings. At the same time, the use of the second servo cylinder as the linear actuator 4032 also realizes highly programmable control to meet different casting needs. The design of this device helps to improve production efficiency, reduce waste rate, and ensure high-quality cast parts.

[0139] In some specific embodiments of the present application, please refer to Figure 8 The macro-adjustment module 402 includes a first frame body 4021, a second frame body 4022 hinged to the first frame body 4021, and a first servo cylinder 4023 with its cylinder body and piston rod respectively hinged to the first frame body 4021 and the second frame body 4022. The second frame body 4022 is fixed with the disc body 4031 in the micro-adjustment module 403 that does not carry the vibration motor.

[0140] Specifically, based on the design of the macro-adjustment module 402, it controls the height and orientation of the module through the first servo cylinder 4023. The cylinder body and piston rod of the first servo cylinder 4023 are hinged to the first frame body 4021 and the second frame body 4022, allowing the height of the module to be adjusted. The second frame body 4022 is fixed with the disc body 4031 in the micro-adjustment module 403 that does not carry the vibration motor. This structure allows the height of the micro-adjustment module 403 to be precisely adjusted with the help of the macro-adjustment module 402, and ensures that the part related to the vibration motor remains in the appropriate position.

[0141] It can be understood that in the scheme provided in the embodiment: the precise control of the height of the mold module is provided, while the relative position of the micro-adjustment module 403 and the vibration motor is maintained. Through the movement of the first servo cylinder 4023, the height and orientation of the mold module can be adjusted, so as to ensure that the direction and intensity of the vibration force can be precisely controlled. In addition, the disc body 4031 of the micro-adjustment module 403 without carrying the vibration motor is located on the second frame body 4022, so as to ensure that the part related to the vibration motor maintains a stable position during the adjustment process. Such precision and stability help to improve the controllability and consistency of the casting process, thereby improving the quality of the castings. At the same time, this design can also adapt to different lost foam molds, thereby supporting the production of different casting requirements.

[0142] In some embodiments of the present application, please refer to Figure 8 : The lifting module 401 includes a truss 4011, a lifting platform 4014 vertically slidingly fitted to the truss 4011, a transmission belt assembly 4013 provided on the sliding surface between the lifting platform 4014 and the truss 4011, and a servo motor 4012 for driving the transmission belt assembly 4013 to perform. The transmission belt of the transmission belt assembly 4013 is fixedly provided on the lifting platform 4014, and when the servo motor 4012 drives the driving wheel of the transmission belt assembly 4013 to rotate, the transmission belt drives the lifting platform 4014 to perform lifting adjustment operation along the truss 4011. The first frame body 4021 of the macro-adjustment module 402 is installed on the truss 4011.

[0143] Specifically: the principle is to use the transmission belt assembly 4013 and the servo motor 4012 to realize the operation of the lifting module 401. The transmission belt is installed between the lifting platform 4014 and the truss 4011 and is driven by the rotation of the servo motor 4012. When the servo motor 4012 starts, the driving wheel of the transmission belt assembly 4013 begins to rotate, thereby driving the transmission belt to perform lifting movement. The lifting platform 4014 performs lifting adjustment operation along the truss 4011 with the movement of the transmission belt, which can be used to adjust the height of the entire device.

[0144] It can be understood that in the scheme provided by the embodiment: programmable adjustment of the height of the device is provided to meet different casting needs. Through the servo motor 4012 and the transmission belt assembly 4013, the height and orientation of the lifting mold module 401 can be accurately controlled. This height adjustability helps to ensure the adaptation to different shapes and sizes of the lost foam mold, thereby supporting the production of different specifications of castings. In addition, the design of the lifting mold module 401 can also ensure the stability of the relative position of the first frame body 4021 of the macro-motion adjustment module 402 on the truss 4011 and the lifting mold module 401 by integrating them together, thereby improving the consistency and controllability of the casting process. The design of this device helps to improve production efficiency, reduce waste, and ensure high quality of cast parts.

[0145] Further, the lifting mold module 401, the macro-motion adjustment module 402, and the micro-motion adjustment module 403 constitute independent molding units 4, each of which has independent movement capability. This independence provides great flexibility and accuracy for the three-dimensional positional relationship of the cellular automaton. Specifically:

[0146] (1) Independent motion control: Each molding unit 4 has its own lifting mold module 401, macro-motion adjustment module 402, and micro-motion adjustment module 403. This means that each molding unit 4 can independently control its position and angle. When the Moore neighborhood of the cellular automaton feeds back the three-dimensional positional relationship of the cells, each molding unit 4 can autonomously adjust its position and angle according to the required excitation force output to adapt to different areas of casting needs.

[0147] (2) Independent excitation force output in three-dimensional space: Since each molding unit 4 can move independently, it can achieve independent excitation force output in three-dimensional space. This means that different vibration forces can be applied in different directions according to the shape of the mold and the requirements of the workpiece to achieve precise molding and casting. This is particularly important for handling molds and workpieces of complex shapes.

[0148] (3) Adaptability and flexibility: Independent motion control gives the system adaptability and flexibility. Regardless of the shape changes of the mold during the casting process, each molding unit 4 can quickly adjust according to the feedback information of the cellular automaton to ensure accurate application of excitation force. This means that manual intervention or mechanical adjustment is not required, improving the degree of automation of the system.

[0149] (4) Improved consistency and quality of casting: Independent excitation force output makes the casting process more consistent, reducing unevenness in molding. Each molding unit 4 can make small adjustments as needed to ensure uniform excitation force distribution on the entire mold surface. This helps to improve casting quality and reduce defects.

[0150] To summarize, in view of the problems in the prior art, the present embodiment is based on the above-mentioned lost foam mold modeling device and casting method for an engine cylinder block, and uses the following technical means or features to achieve the solution:

[0151] (1) Accuracy and adaptability: The technology of the present embodiment uses temperature sensors to monitor the temperature distribution inside the lost foam mold in real time. These temperature data are used to calculate the rate prediction value, so as to accurately predict the fluid flow inside the mold. In addition, the technology of the present embodiment adaptively adjusts the size and position of the vibration force according to the temperature distribution. This adaptability ensures accurate control during the casting process, solving the problem of insufficient accuracy in the prior art.

[0152] (2) Uniformity improvement: By applying vibration force in specific areas inside the mold, the technology of the present embodiment can achieve more accurate and uniform fluid flow. The temperature sensor array group 505 feeds back the temperature distribution in real time, ensuring the uniformity of flow in different areas. This feature helps to reduce the non-uniformity and defects in the casting, thereby improving the casting uniformity.

[0153] (3) Real-time adjustment and adaptability: In combination with Embodiment Two, the technology of the present embodiment uses cellular automata and rate prediction to adjust the size and position of the vibration force in real time at each time step to adapt to the changes of the fluid inside the mold. This real-time adjustment and adaptability enable the technology of the present embodiment to better cope with sudden situations and changes in material properties, solving the problem of the prior art that cannot be adjusted in real time.

[0154] (4) Suitable for complex structures: The technology of the present embodiment can adapt to the casting needs of complex structures by controlling the vibration force of the modeling unit 4. Through flexible angle and orientation adjustment, it can handle lost foam molds of different sizes, thereby overcoming the manufacturing limitations of complex structures in the prior art.

[0155] (5) Energy efficiency improvement: The technology of the present embodiment dynamically adjusts the size of the vibration force according to the rate prediction value to adapt to different flow conditions. This precise control can reduce energy waste and improve energy efficiency.

[0156] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0157] Embodiment Two

[0158] In order to make the above specific embodiments of the present application more apparent and easy to understand, the following will use the form of examples to make a detailed and applicable description of the present application. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the following disclosed examples.

[0159] The present embodiment further provides a lost foam mold modeling and casting method of an engine block, which uses the lost foam mold modeling device as described in Embodiment One to perform the following steps:

[0160] S1, execute cellular automata: each temperature sensor in each temperature sensor array group 505 of each measurement unit 504 corresponds to detect a specific region of the lost foam mold, and each temperature sensor in all temperature sensor array groups 505 comprehensively detects the temperature distribution of the lost foam mold, regarding the region as a cell i;

[0161] S2, cell i definition: each cell i has a temperature Ti attribute, defines a Moore neighborhood Ni, defines a transition function to execute the transition of each cell i in the Moore neighborhood at the next time step, and the transition function follows the three-dimensional Fourier law; each cell i outputs a rate prediction value at the next time step ;

[0162] S3, predict fluid flow conditions: define a rate threshold RV (watt / ㎡), which is an actual rate parameter of the metal fluid used for casting; when the rate prediction value is lower than the rate threshold RV, execute S4;

[0163] S4, pre-vibration modeling: the modeling unit 4 carries the vibration source 4033 to the cell i where the rate prediction value is lower than the rate threshold RV, i.e., the specific region of the corresponding lost foam mold, executes a vibration force Fi output, and performs vibration modeling work; during this period, the corresponding temperature sensor in the temperature sensor array group 505 real-time feedbacks the transition of the cell i at this position, and when the rate prediction value of this cell i is higher than the rate threshold RV, the modeling unit 4 resets;

[0164] S5, cyclically execute S1-S4.

[0165] In the present embodiment: based on the concept of cellular automata, where each cell represents a specific region of the lost foam mold and has a temperature attribute Ti. Through the temperature sensor array group 505, the temperature distribution of the lost foam mold is monitored. The cells are connected to each other through the Moore neighborhood Ni, and the rate prediction value of each cell at the next time step is predicted through the transition function according to the three-dimensional Fourier law.

[0166] It can be understood that in the present embodiment: the functionality of this method lies in achieving accurate temperature monitoring and fluid flow prediction for the lost mold. First, in S1, the temperature sensor array group 505 comprehensively detects the temperature distribution of the lost mold, dividing it into multiple cells. In S2, each cell predicts the rate prediction value of the next time step according to the three-dimensional Fourier law through the conversion function , which helps to understand the temperature changes and flow conditions in the lost mold. In S3, a rate threshold RV is defined to judge the actual rate parameter of the metal fluid. If the rate prediction value is lower than RV, S4, i.e., pre-vibration molding, will be executed. In S4, the molding unit 4 brings the vibration source 4033 to the cell i corresponding to the rate prediction value lower than RV, and performs vibration molding operation by outputting the vibration force Fi. At the same time, the temperature sensor array group 505 feeds back the conversion of cell i in real time. When the rate prediction value is higher than RV, the molding unit 4 will reset.

[0167] Specifically, this method continuously monitors and adjusts the temperature and flow conditions of the lost mold by repeatedly executing S1 to S4, to ensure uniform fluid flow during casting, reduce defects, and improve the quality of castings. Through the use of cellular automata and real-time feedback of temperature sensors, this method can achieve highly accurate casting control.

[0168] In S2 of the present embodiment, specifically includes:

[0169] 1) Assignment: initial state assignment and Moore neighborhood definition:

[0170] 1.1) Initial state assignment: In the cellular automaton, the initial state of the temperature Ti of each cell i is assigned as Ti0. This initial state is based on the starting point of the actual problem, which can usually be determined according to the starting state of the casting simulation.

[0171] 1.2) Moore neighborhood definition: Moore neighborhood is a common neighborhood definition method for cellular automata. It takes cell i itself as the center, including cell i itself and all neighboring cells around it. Specifically, Moore neighborhood Ni is a cube that includes cells whose coordinates (i, j, k) satisfy the condition that the difference between their coordinates and the coordinates of cell i in each dimension does not exceed 1.

[0172] ;

[0173] where ic, jc, kc are the coordinates of cell i;

[0174] Each cell i has an initial temperature Tio and a Moore neighborhood Ni associated with it, which can be used for subsequent temperature gradient calculation and rate prediction.

[0175] 2) The conversion function includes temperature gradient calculation and rate prediction:

[0176] 2.1) For each cell i, the following steps are performed:

[0177] Calculate the temperature gradient of cell i For each cell i, the temperature gradient is calculated as the differential mean of temperature values within its Moore neighborhood Ni. This gradient represents the change in temperature around cell i and is based on a gradient calculation of local temperature differences. The temperature values within the Moore neighborhood Ni are used to calculate the differential:

[0178] ;

[0179] j represents a neighboring cell in the Moore neighborhood Ni of cell i, Tj represents the temperature of neighboring cell j, and (Tj - Ti) represents the temperature difference between neighboring cell j and cell i, which is used to calculate the temperature gradient;

[0180] 2.2) Fourier's law describes the relationship between temperature gradient and heat conduction rate. Here, is the rate prediction value for the next time step, which is calculated using Fourier's law to predict the rate for the next time step :

[0181] ;

[0182] k is the thermal conductivity, which represents the heat conducting property of the material;

[0183] is the density, which represents the density of the fluid;

[0184] q is the heat conduction vector, which represents the direction and rate of heat transfer.

[0185] Specifically, the temperature gradient is calculated by using the temperature value difference within the Moore neighborhood Ni of cell i. This gradient represents the change in temperature around cell i and is expressed in the form of the mean of temperature differences. When the temperature gradient of cell i is obtained, the Moore neighborhood Ni of cell i can be used to predict the state space for the next time step, and then Fourier's law is used to evaluate the heat conduction process. Therefore, it includes:

[0186] P1, temperature gradient calculation:

[0187] First, the temperature gradient of cell i is calculated by using the difference in temperature values within the Moore neighborhood of i This gradient represents the change in temperature around cell i.

[0188] P2, Predict the state space of the next time step: Using the obtained temperature gradient , the state space of the next time step can be predicted:

[0189] P2.1, Use the temperature gradient to predict the amount of temperature change of cell i in the next time step. Specifically, if the temperature gradient is positive, it indicates that the temperature will rise, and vice versa:

[0190] ;

[0191] where:

[0192] : amount of temperature change, representing the change in temperature of cell i in the next time step.

[0193] : rate prediction value, representing the rate of heat conduction, calculated by Fourier's law.

[0194] : time step length, representing the time interval in the simulation.

[0195] P2.2, Update the temperature state of cell i based on the amount of temperature change. This update takes into account the rate of heat conduction and the time step length:

[0196] ;

[0197] where Ti new: the new temperature state of cell i in the next time step.

[0198] These formulas convert the temperature gradient and the rate prediction value into the amount of temperature change of cell i in the next time step and are used to update the temperature state of cell i, Ti new. In this way, the evolution of the temperature distribution can be simulated in the cellular automaton model, taking into account factors such as the rate of heat conduction and the time step length.

[0199] P3, For the Moore neighborhood: If the temperature state of cell i rises ( > 0), its heat will be conducted to the surrounding neighboring cells, causing the surrounding cells' temperatures to also rise. If the temperature state of cell i decreases ( If the temperature of cell i is lower than the average temperature of its Moore neighborhood (i.e., Ti < 0), then cell i will absorb heat from its surrounding neighboring cells, causing the temperature of the surrounding cells to also possibly decrease. In this step, it means that the temperature change will spread and propagate within the Moore neighborhood, affecting other cells neighboring cell i. This temperature conduction effect can be reflected by the temperature state update of other cells in the Moore neighborhood, thus forming the temperature interaction between neighboring cells in the cellular automaton.

[0200] An imaginable scenario is as follows: please refer to Figure 10 The C area (large square in the figure) is a schematic of the mold box, and the small square array shown in the D area is a cell (i.e., the area detected by each temperature sensor of the temperature sensor array group 505 in Embodiment 1), and the several three-dimensional Moore neighborhoods include several cells (three-dimensional areas), each of which is discrete; under the premise of heat change, each area (cell) will be converted, and a discrete three-dimensional grid structure composed of all areas can be regarded as the temperature change caused by the flow of fluid in the mold; based on the foregoing steps, the temperature change at the next moment can be predicted, and then the specified area is output with vibration force in combination with the technology of the foregoing Embodiment 1, to realize the vibration molding operation; this further illustrates the correlation between neighboring cells in the cellular automaton and how the temperature change propagates and affects the fluid flow in the entire system.

[0201] P4, evaluate heat conduction using Fourier's law.

[0202] In S2.1 of the present embodiment, each cell i needs to be initialized. Each cell has an initial temperature Ti0, and its associated Moore neighborhood Ni is a cube including cell i itself and all neighboring cells around it. The boundary of the Moore neighborhood is defined by the coordinates ic, jc, and kc, which represent the position of cell i. The initial temperature and neighborhood information will be used in subsequent calculations.

[0203] In the temperature gradient calculation of the present embodiment, for each cell i, the temperature gradient ∇Ti is calculated. This is calculated by using the difference of temperature values within the Moore neighborhood Ni. represents summation, j represents a neighboring cell in the Moore neighborhood Ni of cell i, Tj represents the temperature of neighboring cell j, (Tj - Ti) represents the temperature difference between neighboring cell j and cell i, and |Ni| represents the number of elements of the Moore neighborhood. The calculated temperature gradient will be used in the subsequent rate prediction calculation.

[0204] In this embodiment: The purpose of this conversion function is to predict the velocity change of the cell in the next time step based on the temperature gradient, which in turn affects the fluid flow situation of the lost foam mold. This simulation method allows real-time prediction and adjustment of fluid flow during the casting process to improve the quality and uniformity of the casting.

[0205] Further, in the simulation of the cellular automaton in this embodiment, the temperature gradient is a key parameter for describing the change of temperature in space. By calculating the difference of temperature values of adjacent cells in the Moore neighborhood, the temperature gradient of cell i can be obtained. This temperature gradient is necessary information for subsequent calculation of the velocity prediction value . The Moore neighborhood also determines the information exchange path between cell i and its adjacent cells. In the casting method, these information exchange paths are used to transfer temperature gradients and other necessary information between cells in order to make state predictions and fluid flow control in the next time step. The definition of Moore neighborhood enables each cell to obtain information from its surrounding cells, which provides support for the adaptability of the cellular automaton. According to the state and temperature distribution of the surrounding cells, the cell can adjust its own state and output to adapt to different conditions and requirements.

[0206] Further, the triggering of the vibratory molding in this embodiment is based on the comparison of the velocity prediction value and the velocity threshold RV. When the velocity prediction value of a certain cell i is lower than the velocity threshold RV, it indicates that the fluid flow in this region is relatively slow, which may need to be promoted by vibratory molding to ensure the uniformity and quality of the casting. At this time, the molding unit 4 is activated and ready to perform the vibratory molding operation. Once the triggering condition is met, the molding unit 4 carries the seismic source 4033 to the cell i corresponding to the velocity prediction value lower than the velocity threshold RV. This means that the vibration force Fi will be output and act on the specific cell i, i.e. the specific region of the lost foam mold. During the vibratory molding operation, the temperature sensors in the temperature sensor array group 505 monitor the temperature changes of the cell i in real time. These data feedback back to the system for control and adjustment of the output of the vibration force. If the velocity prediction value of the cell i rises and exceeds the velocity threshold RV during the vibratory molding process, it indicates that the fluid flow is already fast enough and no additional vibration is needed. At this time, the molding unit 4 will reset and stop the output of the vibration force to avoid excessive interference with the fluid flow.

[0207] It can be understood that through this mechanism, the system can achieve adaptive control of fluid flow in advance. The output of the vibration force will be adjusted according to the changes in the flow of the fluid at the next time step, thereby ensuring uniform flow of the fluid inside the mold and improving the quality and consistency of the casting. At the same time, the real-time responsiveness of the system enables it to adapt to different casting requirements, improving production efficiency and energy efficiency.

[0208] In this embodiment, the calculation method of the size of the vibration force Fi in S4 is:

[0209] ;

[0210] A is a material property parameter, representing the degree of response of the material to the vibration force. Different materials have different A values, and the value of A can be obtained from existing mechanical manuals or standardized manuals of fluid mechanics of materials to describe their vibration characteristics.

[0211] It can be understood that in S4, the size of the vibration force Fi is calculated, which will be applied to a specific area of the lost foam mold. is the rate prediction value calculated in S2, which describes the change in velocity of cell i at the next time step. By multiplying the rate prediction value with the material property parameter A, the size of the vibration force applied to the specific area can be determined. This vibration force helps to improve the fluid flow inside the lost foam mold, thereby improving the uniformity and quality of the casting process. This embodiment allows automatic adjustment of the size of the vibration force according to the material property parameter and the rate prediction to adapt to different casting conditions and requirements. This precise control helps to reduce defects in casting and improve the quality of the final casting.

[0212] Further, the material property parameter A is a parameter representing the degree of response of the material to the vibration force. This parameter is usually dependent on the specific material and manufacturing process, as well as the desired vibration effect. It can be:

[0213] (1) Elastic Modulus: Elastic modulus measures the degree of deformation of a material under external force. For different materials, their elastic modulus may differ significantly, so it can be used as the material property parameter A or part of it.

[0214] (2) Material Damping: Material damping refers to the ability of a material to absorb vibration energy. Different materials have different vibration damping properties, and some materials may lose more energy in vibration, so vibration damping can also be used as parameter A or part of it.

[0215] (3) Temperature Sensitivity: The mechanical properties of a material can change at different temperatures. If a material is very sensitive to temperature changes, then temperature changes can also be a factor in parameter A or a part of it.

[0216] (4) Viscosity of the material: The viscous properties of a material affect its response to vibrations. A more viscous material can generate more energy loss under the action of vibrations, so viscosity can be a parameter A or a part of it.

[0217] It should be noted that the calculation method of the vibration force Fi is a sufficient condition for implementing the present technology, not a necessary condition. Based on the numerical value of A, a more accurate vibration force Fi output can be obtained, but if the form of adjusting the vibration force Fi is not used, the mold can still be vibrated to shape.

[0218] The above-described embodiments only express the implementation of the related practical application of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the scope of protection of the present application patent should be subject to the appended claims.

[0219] Example Three

[0220] In order to make the above specific embodiments of the present application more obvious and easy to understand, the following will use the form of examples to make a detailed application of the present application. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, therefore the present application is not limited by the following disclosed examples.

[0221] This embodiment will provide a storage medium, which stores a control program for executing the steps S1-S5 in Example Two, please refer to Figures 11-12 , which uses C++ pseudo code to show the logic, its principle includes:

[0222] (1) Define the cell structure (struct Cell): Create a cell structure containing temperature (temperature) and temperature gradient (gradient) attributes, which will form a three-dimensional grid.

[0223] (2) Initialize the three-dimensional grid: Create a three-dimensional grid (grid) to represent the space during the casting process. The initial temperature and gradient of each cell are set to the initial value.

[0224] (3) CalculateGradient: A function is defined to calculate the temperature gradient of each cell by iterating through the Moore neighborhood of the cell and calculating the difference in temperature of adjacent cells, which is used for the rate prediction in the following step. This is part of the implementation of S2.

[0225] (4) Loop through the 3D grid for S1-S4: Use nested loops to iterate through each cell in the 3D grid and perform the steps of S1-S4 for each cell:

[0226] S1: Calculate the temperature gradient on each cell.

[0227] S2: Estimate the rate prediction value (alpha) using Fourier's law based on the calculated temperature gradient.

[0228] S3: Determine if the rate prediction value is below the rate threshold (rateThreshold), if so, continue to S4.

[0229] S4: If the rate prediction value is below the rate threshold, perform the tremor molding operation.

[0230] This part of the embodiment provides a cellular automaton in a 3D space, where each cell has a temperature and temperature gradient attribute. By calculating the temperature gradient and applying Fourier's law to estimate the rate prediction value, the system can decide whether to perform the tremor molding operation based on whether the rate is below the threshold.

[0231] In this embodiment, the storage medium has stored therein a control program for executing the apparatus provided in Embodiment One, please refer to Figures 13-14 , which shows the logic in the form of C++ pseudo code, and its principles include:

[0232] (1) RotaryTable::rotate(double angle): This function defines the operation of controlling the motorized rotary table module 3 to rotate to a specified angle. In actual applications, it will call the underlying hardware control interface to control the movement of the rotary table.

[0233] (2) MoldingUnit::adjustHeight(double height), MoldingUnit::adjustPosition(double position), MoldingUnit::adjustOrientation(double orientation): These functions define the height, position, and orientation adjustment of a single molding unit 4. They are used to adjust the movement of the module to achieve the output of the excitation force in the 3D space. In actual applications, these functions will also involve underlying hardware control.

[0234] (3) TopologicalMeasurement::moveUpAndDown(double distance): This function defines the up-and-down operation of the topological measurement mechanism 5, which controls the up-and-down movement of the up-and-down servo cylinder 503.

[0235] (4) TopologicalMeasurement::performMeasurement(): This function defines the operation of temperature measurement. In actual application, it communicates with the sensor, obtains temperature data, and performs the corresponding cellular automaton algorithm.

[0236] The above-described embodiments only express the relevant actual application implementation of the present application, which is described in detail and specifically, but should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the scope of protection of the present application patent should be subject to the appended claims.

Claims

1. An apparatus for building an engine block lost foam mold, characterized by, Comprise: A plurality of modeling units (4) are arranged in the form of a ring array, and each adjacent modeling unit (4) has a spacing a; The modeling unit (4) comprises a lifting linear degree of freedom, a feeding linear degree of freedom and a universal linear degree of freedom, and a seismic source (4033) for modeling, the lifting linear degree of freedom, the feeding linear degree of freedom and the universal linear degree of freedom are respectively used to adjust the lifting, feeding and universal azimuth adjustment of the seismic source (4033); It also includes a topological measurement mechanism (5), which is arranged in the form of a ring array with a plurality of measurement units (504); The measurement unit (504) is loaded with a temperature sensor array group (505); The topological circular base formed by all the measurement units (504) is adjusted in diameter by the topological measurement mechanism (5); Each adjacent modeling unit (4) has a spacing b; The spacing a and the spacing b are matched; The topological measurement mechanism (5) comprises a first cylinder (501) and a second cylinder (502) that slide up and down, and the second cylinder (502) is loaded with a lifting servo cylinder (503) for lifting adjustment of the first cylinder (501); The first cylinder (501) is uniformly arrayed with the measurement units (504) in the form of a ring array, and when the first cylinder (501) is lifted in the second cylinder (502), all the measurement units (504) are collectively away from or close to the central axis of the first cylinder (501); The measurement unit (504) comprises a first plate body (5042) and a second plate body (5043) hinged to each other, the lower end of the second plate body (5043) is hinged to the second cylinder (502), one end and the other end of the hinged bracket (5041) are respectively hinged to the outside of the first plate body (5042) and the first cylinder (501); The second plate body (5043) is loaded with the temperature sensor array group (505).

2. The lost foam molding apparatus of claim 1, wherein: The electric rotary table module (3) is arranged in the form of a ring array with a plurality of modeling units (4).

3. The lost foam molding apparatus of claim 1 or 2, wherein: The modeling unit (4) comprises a lifting module (401) for outputting the lifting linear degree of freedom, a macro adjustment module (402) for outputting the feeding linear degree of freedom and a micro adjustment module (403) for outputting the universal linear degree of freedom; The lifting module (401) is used to adjust the height direction of the macro adjustment module (402), the macro adjustment module (402) is used to adjust the feeding distance of the micro adjustment module (403), and the micro adjustment module (403) is loaded with the seismic source (4033), and the seismic source (4033) is a vibration motor.

4. The lost foam molding apparatus of claim 3, wherein: The micro-motion adjustment module (403) comprises two mutually opposite disc bodies (4031), and at least three linear actuators (4032) for collectively outputting the linear freedom of the universal direction are arranged in an annular array between the two disc bodies (4031), and the linear actuators (4032) are connected to one side opposite to the two disc bodies (4031); The vibration motor is mounted on one of the disc bodies (4031).

5. The lost foam molding apparatus of claim 3, wherein: The macro-motion adjustment module (402) comprises a first frame body (4021), a second frame body (4022) hinged to the first frame body (4021), and a first servo cylinder (4023) with a cylinder body and a piston rod hinged to the first frame body (4021) and the second frame body (4022) respectively.

6. A method of lost foam mold molding of an engine block, characterized by: The following steps are performed by using the lost mold molding device according to any one of claims 1-5: S1, performing cellular automata: each temperature sensor in the temperature sensor array group (505) of each measurement unit (504) corresponds to detecting a region of the lost mold, and the region is regarded as a cell i; S2, Cell i definition: each of said cells i has the attribute of temperature Ti, defines a Moore neighborhood Ni, defines a transition function that performs the transition of each cell i in said Moore neighborhood in the next time step, said transition function follows the three-dimensional Fourier's law; each cell i outputs a rate prediction value in the next time step ; S3, predicting the fluid flow condition: defining a rate threshold value RV, in watts / m2, which is an actual rate parameter of the metal fluid used for casting; when the rate prediction value is lower than the rate threshold value RV, performing S4; S4, pre-vibration modeling: the modeling unit (4) carries the vibration source (4033) to the speed prediction value At the cell i corresponding to the speed threshold value RV, the output of the vibration force Fi is performed to carry out the vibration modeling operation. S5, cyclically performing S1-S4.

7. The lost foam mold casting method of claim 6, wherein: In the S2: 1) the initial state of the temperature Ti of each cell is allocated as Ti0, the Moore neighborhood Ni is a cube, the cube includes the cell i itself and all adjacent cells around it, and the Moore neighborhood Ni includes: ； Wherein, ic, jc, kc are the coordinates of cell i; 2) the conversion function includes: 2.1) for each cell i, the following steps are performed: calculating a temperature gradient for the cell i using a difference of temperature values within the Moore neighborhood Ni ； j represents a neighboring cell in the Moore neighborhood Ni of cell i, Tj represents the temperature of the neighboring cell j, and (Tj - Ti) represents the temperature difference between the neighboring cell j and the cell i, which is used to calculate the temperature gradient; 2.2) Calculate the rate prediction value for the next time step using Fourier's law : ； k is the thermal conductivity, which represents the heat conduction performance of the material; is the density, representing the density of the fluid; q is the heat conduction vector, which represents the direction and rate of heat transfer.

8. The lost foam mold molding process of claim 7, wherein: In the S4: the calculation method of the size of the vibration force Fi is: ； A is a material property parameter, which represents the response degree of the material to the vibration force.

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