A mechanical pressing and forming method for a ventilation cover sound insulation pad

Abstract

The present invention discloses a mechanical pressing and molding method for a ventilation cover sound insulation pad, which relates to the field of mechanical manufacturing and thermal control technology. The method comprises S1, adjusting the layout of a heating and cooling system in a molding area to control the temperature based on the thermal deformation characteristics of the material, S2, placing the pretreated sound insulation material in a mold and performing preliminary positioning, S3, starting a pressing device to apply a predetermined pressure and compact the material, and S4, automatically cooling and taking out the molded ventilation cover sound insulation pad after the pressing is completed; the mechanical pressing and molding method for the ventilation cover sound insulation pad effectively reduces internal defects caused by thermal stress, improves the density uniformity and sound insulation performance of the sound insulation pad, meets higher performance requirements, is compatible with different materials and molding requirements, has strong versatility, is suitable for the production processes of a variety of sound insulation pad products, and adjusts the layout of the heating and cooling system in the molding area to control the temperature deformation of the material during the pressing process.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing and thermal control, and in particular to a mechanical pressing and molding method for a ventilation cover plate sound insulation pad. Background Art

[0002] In the prior art, ventilation cover sound insulation pads are usually manufactured by mechanical pressing and molding. In the molding process, the layout of the heating and cooling system is one of the key factors, which directly affects the temperature distribution and molding quality of the material. Traditional heating and cooling systems usually adopt a fixed distribution mode to achieve material pressing through uniform heating or cooling. However, due to the thermal expansion and temperature sensitivity of the sound insulation pad material, during the pressing process, the material is prone to warping, cracking or local uneven thickness due to uneven temperature.

[0003] The limitations of the existing heating and cooling system layout are mainly reflected in the following aspects: First, the system layout cannot be dynamically adjusted according to the different physical properties and shape requirements of the material, resulting in uneven temperature distribution in the molding area; second, the switching process of heating and cooling has a slow response speed and is difficult to adapt to the complex pressing molding process requirements; third, the lack of precise regional temperature control can easily cause problems such as local overheating or insufficient cooling of the material. These technical defects directly affect the dimensional accuracy, surface quality and sound insulation performance of the finished product. Therefore, how to improve the layout of the heating and cooling system in the molding area so that it can be dynamically adjusted and achieve precise temperature control is an urgent problem that needs to be solved in the existing technology. Summary of the invention

[0004] The object of the present invention is to provide a mechanical pressing and molding method for a ventilation cover plate sound insulation pad, and to adjust the layout of the heating and cooling system in the molding area to control the temperature deformation of the material during the pressing process.

[0005] To achieve the above object, the present invention provides the following technical solution: a mechanical pressing and molding method for a ventilation cover sound insulation pad, the method comprising:

[0006] S1. Adjust the heating and cooling system layout of the molding area based on the thermal deformation characteristics of the material to control the temperature, including simulating the temperature change behavior in the heating and cooling system layout. The specific formula is:

[0007] ; ; ;

[0008] Among them, x represents the difference in local temperature distribution inside the ventilation cover sound insulation pad material, t represents time, σ represents the heat transfer rate inside the material or in the heating and cooling system, y represents the distribution of heat flow in the molding area, ρ represents the energy difference of heat flow in the heating and cooling system, z represents the comprehensive influence of the external environment on the internal temperature of the material, and β represents the ability of the material or the heating and cooling system to dissipate heat;

[0009] Adjust the parameters σ, ρ, and β to optimize the heat flow layout, monitor and adjust the output of the heating or cooling element in real time to avoid thermal deformation. S1 also includes monitoring and recording the shrinkage and expansion coefficients of the material in different temperature ranges, determining the location and range of the heating and cooling areas based on the monitored shrinkage and expansion coefficients, and dividing the heating and cooling system layout into multiple independent controllable temperature zones. When λ≥k1, increase the cooling rate of the corresponding temperature zone to c+Δc, where h represents the material thickness, λ represents the thermal conductivity, k1 represents the set thermal conductivity threshold, and Δc represents the cooling rate increment;

[0010] S2, placing the pretreated sound insulation material in the mold and performing preliminary positioning;

[0011] S3, starting the pressing device to apply a predetermined pressure and compact the material;

[0012] S4. After the pressing is completed, the formed ventilation cover sound insulation pad is automatically cooled and taken out.

[0013] Preferably, S2 includes:

[0014] Model the material pretreatment position and mold area, describe the material transfer process from the starting position to the final positioning state, calculate the transfer probability, and select the optimal path to place the material in the mold. The specific formula is:

[0015] = ;

[0016] Among them, X n represents the position or state of the material at the nth time step, X n+1 represents the target position or state of the material at the n+1th time step, x represents the position parameter of the material,

[0017] Indicates that the material is from the current state Transfer to next state The probability of X0 represents the starting position of the material, n represents the number of time steps of the positioning process, and x n Represents the specific state value of the material at time step n;

[0018] Combining visual sensors with robotic arm control, the material position is dynamically adjusted according to the transfer path to complete the initial positioning.

[0019] Preferably, S3 includes:

[0020] The pressing pressure, material density and equipment performance are modeled as follows: ;

[0021] Among them, F represents the pressing pressure, A represents the comprehensive technical efficiency of the pressing equipment, L represents the material density, K represents the equipment performance, α represents the influence weight of the material attribute, and γ represents the influence weight of the equipment performance;

[0022] Adjust the values ​​of A, α, and γ to optimize the working parameters of the pressing equipment to ensure maximum pressing efficiency while preventing material damage.

[0023] Preferably, S4 includes:

[0024] Simulate the flow characteristics of cooling gas on the mold surface. The specific formula is: H = avG / μ;

[0025] Wherein, H represents the characteristic value of the cooling airflow flowing on the mold surface, a represents the density of the cooling gas, v represents the speed of the cooling airflow flowing on the mold surface, G represents the size of the mold cooling area, and μ represents the dynamic viscosity coefficient of the cooling gas;

[0026] Optimize the cooling air flow speed and direction, monitor the cooling effect in real time through the mold temperature sensor, and when the temperature reaches the specified range, the robot automatically removes the sound insulation pad.

[0027] Preferably, S1 also includes monitoring and recording the shrinkage and expansion coefficients of the material in different temperature ranges, determining the position and range of the heating and cooling areas based on the monitored shrinkage and expansion coefficients, dividing the heating and cooling system layout into multiple independent controllable temperature zones, and when λ≥k1, increasing the cooling rate of the corresponding temperature zone to c+Δc, wherein h represents the material thickness, λ represents the thermal conductivity coefficient, k1 represents the set thermal conductivity coefficient threshold, and Δc represents the cooling rate increment.

[0028] Preferably, the preliminary positioning of the sound insulation material in S2 is completed by a robotic arm.

[0029] Preferably, the pressing device in S3 comprises a multi-point pressure distribution unit, and the multi-point pressure distribution unit adjusts the size and distribution of the applied pressure in real time according to the change of material thickness.

[0030] Preferably, the preliminary positioning in S2 is combined with a multi-point laser sensor to detect the surface morphological characteristics of the material, so as to correct the initial placement position of the material.

[0031] Preferably, the initial values ​​of α and γ in S3 are calibrated through experiments.

[0032] Preferably, the speed v of the cooling airflow flowing on the mold surface in S4 is controlled by a variable frequency fan to achieve zoned regulation of the airflow speed.

[0033] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0034] The mechanical pressing and forming method of the ventilation cover sound insulation pad controls the temperature by adjusting the layout of the heating and cooling system of the molding area based on the thermal deformation characteristics of the material, placing the pretreated sound insulation material in the mold and performing preliminary positioning, starting the pressing device to apply a predetermined pressure and compact the material, automatically cooling and taking out the formed ventilation cover sound insulation pad after the pressing is completed, and being able to adjust the temperature distribution in real time according to the different physical properties and shape requirements of the sound insulation pad material, avoiding material warping, cracking or local thickness unevenness caused by uneven temperature, achieving a significant improvement in response speed, being able to adapt to complex pressing and forming process requirements, effectively improving production efficiency and product quality, avoiding local overheating or insufficient cooling of the material, thereby ensuring the dimensional accuracy and surface quality of the finished product, effectively reducing internal defects caused by thermal stress, improving the density uniformity and sound insulation performance of the sound insulation pad, meeting higher performance requirements, being compatible with different materials and molding requirements, having strong versatility, and being suitable for the production processes of a variety of sound insulation pad products, and adjusting the layout of the heating and cooling system of the molding area to control the temperature deformation of the material during the pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1 As shown, the present invention provides a technical solution: a mechanical pressing and molding method for a ventilation cover sound insulation pad, the method comprising:

[0038] S1. Adjust the heating and cooling system layout of the molding area based on the thermal deformation characteristics of the material to control the temperature, including simulating the temperature change behavior in the heating and cooling system layout. The specific formula is:

[0039] ; ; ;

[0040] Among them, x represents the difference in local temperature distribution inside the ventilation cover sound insulation pad material, t represents time, σ represents the heat transfer rate inside the material or in the heating and cooling system, y represents the distribution of heat flow in the molding area, ρ represents the energy difference of heat flow in the heating and cooling system, z represents the comprehensive influence of the external environment on the internal temperature of the material, and β represents the ability of the material or the heating and cooling system to dissipate heat;

[0041] Adjust parameters to optimize heat flow layout, monitor and adjust heating or cooling element output in real time to avoid thermal deformation;

[0042] S2, placing the pretreated sound insulation material in the mold and performing preliminary positioning;

[0043] S3, starting the pressing device to apply a predetermined pressure and compact the material;

[0044] S4. After the pressing is completed, the formed ventilation cover sound insulation pad is automatically cooled and taken out.

[0045] This embodiment optimizes the temperature distribution in the molding area by utilizing the thermal deformation characteristics of the material, thereby solving the problem of deformation or performance degradation caused by uneven heating of the material in the traditional molding process. In step S1, the heat transfer behavior of the material in the heating and cooling system is simulated, and the heat flow layout is optimized by adjusting the parameters σ, ρ, β to ensure that the temperature gradient of the material in the molding area is controlled within a reasonable range. This method can effectively prevent material defects caused by heat concentration or excessive heat loss. In steps S2-S4, the shape and performance stability of the product are ensured by pre-positioning, mechanical pressing and cooling the sound insulation material. The present invention improves the molding quality of the sound insulation pad material by accurately controlling the temperature distribution, avoids defects caused by uneven heat distribution, and significantly reduces the pressing and cooling time by optimizing the heat flow layout and automated operation process, thereby improving production efficiency. By reducing heat waste and energy consumption, the requirements of energy conservation and environmental protection are met, and the thermal deformation control of the product during the production process is more precise, making it more reliable and durable.

[0046] S2 includes modeling the material pre-processing position and mold area, describing the material transfer process from the starting position to the final positioning state, calculating the transfer probability, and selecting the optimal path to place the material in the mold. The specific formula is:

[0047] = ;

[0048] Among them, X n represents the position or state of the material at the nth time step, X n+1 represents the target position or state of the material at the n+1th time step, x represents the position parameter of the material,

[0049] Indicates that the material is from the current state Transfer to next state The probability of X0 represents the starting position of the material, n represents the number of time steps of the positioning process, and x n Represents the specific state value of the material at time step n;

[0050] Combining visual sensors with robotic arm control, the material position is dynamically adjusted according to the transfer path to complete the initial positioning.

[0051] This implementation method mathematically models the material transfer process between the pre-treatment position and the mold area to ensure that the material can be accurately positioned in the mold. The Markov chain model is used to describe the material transfer process from the starting position to the final target position and calculate the probability of each step of the transfer. , achieving dynamic optimization. Combined with visual sensors to obtain real-time position data of materials, the robotic arm adjusts the position of the material according to the optimal transfer path, so that the material can be positioned within the shortest path, ensuring the smooth progress of subsequent pressing and molding steps. The material positioning process is optimized through mathematical models, reducing the errors that may be caused by traditional manual adjustments. The use of automated path planning and adjustment improves positioning efficiency and shortens the production cycle. Combining visual sensors with robotic arms to achieve dynamic adjustment makes the entire process smarter and more reliable, reduces material waste caused by positioning errors, and reduces production costs.

[0052] S3 includes modeling of pressing pressure, material density and equipment performance. The specific formula is: ;

[0053] Among them, F represents the pressing pressure, A represents the comprehensive technical efficiency of the pressing equipment, L represents the material density, K represents the equipment performance, α represents the influence weight of the material attribute, and γ represents the influence weight of the equipment performance;

[0054] Adjust the values ​​of A, α, and γ to optimize the working parameters of the pressing equipment to ensure maximum pressing efficiency while preventing material damage.

[0055] This implementation solves the problems of uneven pressure distribution, unstable material density, and insufficient equipment energy efficiency in the traditional pressing process by modeling and optimizing the key influencing factors in the pressing process. The relationship between the pressing pressure F and the material density L, the equipment comprehensive efficiency A, and the equipment performance K is accurately quantified and modeled. The core of this model is to fully consider the synergy between material properties and equipment capabilities. By adjusting α and γ, the influence weights of material properties and equipment performance in the overall pressing process can be controlled, thereby achieving adaptability to different materials or equipment. Dynamic adjustment of pressing pressure: The molding characteristics of the material are highly dependent on density distribution and force uniformity. The present invention uses a feedback control system to dynamically adjust the pressing pressure F by real-time monitoring of the changes in material density L and the influence of the equipment operating status on the performance parameter K, ensuring that the pressure is evenly distributed in the mold and avoiding material damage or indentation caused by local overpressure. Equipment efficiency optimization: By optimizing the equipment comprehensive efficiency parameter A, the energy utilization rate in the pressing process can be significantly improved. The adjustment of parameter A is completed by the equipment control system, and can be automatically optimized in combination with factors such as the equipment's operating load, mold temperature, and pressing time, thereby avoiding unnecessary energy consumption. Improved damage resistance: By adjusting the combination of material property weight α and equipment performance weight γ, material cracks, deformation, or equipment failures caused by excessive pressure or insufficient equipment performance can be effectively prevented. For example, for more brittle sound insulation materials, the value of γ can be appropriately increased to enhance the role of equipment performance in pressure control. Closed-loop control mechanism: Combined with advanced sensors and data acquisition systems, this embodiment can realize real-time collection and feedback adjustment of key parameters, such as pressing pressure and density changes, to form a closed-loop control. This mechanism not only ensures the stability of the pressing process, but also reduces the necessity of human intervention. Through the above-mentioned optimization and modeling design, the present invention ensures the uniformity and high efficiency of the pressing process, while avoiding problems such as material damage and equipment overload, and provides a guarantee for the high-quality molding of sound insulation pads. Through precise modeling and parameter optimization, the efficiency and molding quality of the equipment pressing process are improved, and the waste of resources caused by material damage or low equipment efficiency is reduced, thereby reducing production costs. By adjusting the pressing parameters, the wear rate of the equipment during operation is reduced and the service life of the equipment is extended. The model is suitable for the pressing process of different materials and equipment and has strong adaptability.

[0056] S4 includes simulating the flow characteristics of the cooling gas flow on the mold surface, and the specific formula is: H = avG / μ; wherein H represents the characteristic value of the cooling gas flow on the mold surface, a represents the density of the cooling gas, v represents the speed of the cooling gas flow on the mold surface, G represents the size of the mold cooling area, and μ represents the dynamic viscosity coefficient of the cooling gas;

[0057] Optimize the cooling air flow speed and direction, monitor the cooling effect in real time through the mold temperature sensor, and when the temperature reaches the specified range, the robot automatically removes the sound insulation pad.

[0058] This embodiment ensures that the sound insulation pad is cooled quickly and reaches the ideal temperature range after pressing and molding by modeling and optimizing the characteristics of the cooling airflow, while avoiding the degradation of material performance caused by uneven cooling or overcooling. The following is a specific description of the working principle: The efficiency of the cooling process is highly dependent on the flow characteristics of the airflow on the mold surface. The formula H=avG / μ quantifies the key parameters of the cooling airflow, such as density a, velocity v, area size G and viscosity coefficient μ, and provides a mathematical model that accurately describes the cooling effect. By adjusting the airflow speed and direction, the uniformity of airflow coverage on the mold surface can be effectively enhanced. Combining the geometric characteristics of the mold with the distribution of the cooling area, the airflow speed v and direction are dynamically adjusted to ensure that the airflow can cover the entire mold surface in the optimal path. Specifically, for a larger mold cooling area G, increasing the airflow speed v helps to accelerate cooling; while in local high temperature areas, focusing cooling is achieved by changing the airflow direction to prevent local heat retention. The mold temperature sensor is responsible for collecting real-time temperature data and adjusting the cooling parameters through a feedback control system. When the mold surface temperature is detected to enter the preset range, the control system will automatically instruct the robot to perform the removal operation of the sound insulation pad, thereby avoiding material performance problems caused by insufficient cooling or overcooling. By combining cooling airflow modeling with sensor feedback control, this implementation method achieves a high degree of automation and intelligence in the cooling process. The entire process does not require human intervention, which not only improves production efficiency, but also ensures the molding quality and physical properties of the sound insulation pad. By optimizing the airflow speed and direction, the cooling time is greatly shortened. Real-time monitoring and feedback control ensure a uniform cooling process and prevent the material from being damaged by overcooling or uneven cooling. Combined with sensors and robotics technology, the entire process is automated, reducing the risk of human intervention and misoperation. The cooling model is suitable for different mold sizes and material properties, and has strong flexibility and scalability.

[0059] S1 also includes monitoring and recording the shrinkage and expansion coefficients of the material in different temperature ranges, determining the location and range of the heating and cooling areas based on the monitored shrinkage and expansion coefficients, dividing the heating and cooling system layout into multiple independent controllable temperature zones, and when λ≥k1, increasing the cooling rate of the corresponding temperature zone to c+Δc, where h represents the material thickness, λ represents the thermal conductivity, k1 represents the set thermal conductivity threshold, and Δc represents the cooling rate increment.

[0060] This embodiment realizes the precise layout and control of the heating and cooling system by monitoring the thermal physical properties of the material, such as the shrinkage coefficient and the expansion coefficient, combined with the dynamic change law of the thermal conductivity coefficient. The following is the specific principle of the method: the shrinkage and expansion coefficients of the material have significant differences in different temperature ranges. These physical parameters are monitored by high-precision sensors to establish a functional relationship with temperature changes. Combined with the material thickness h and the thermal conductivity coefficient λ, its thermal response behavior during the molding process is calculated to provide data support for the layout optimization of the heating and cooling system. According to the shrinkage and expansion characteristics of the material, the entire molding area is divided into multiple independent controllable temperature zones. A heating and cooling system is arranged in each temperature zone. By accurately controlling the temperature of each temperature zone, the gradual heating and uniform cooling of the material can be achieved to avoid local overheating or insufficient cooling. When the thermal conductivity coefficient λ of the material is monitored to exceed the set threshold k1, the cooling rate of the corresponding temperature zone is automatically increased to c+Δc. This dynamic adjustment is achieved by changing the flow rate of the cooling medium or enhancing the heat transfer capacity of the cooling medium, thereby quickly dissipating heat and avoiding stress concentration or deformation of the material due to excessive temperature gradients. Combined with the monitoring data, the control system adjusts the operating status of the heating and cooling system in real time. Through the closed-loop control mechanism, the temperature change in the temperature zone can be accurately matched with the thermal response behavior of the material, reducing manual intervention and improving the stability of the molding process. Through zone temperature control and dynamic cooling speed adjustment, the temperature control accuracy during heating and cooling is significantly improved to ensure that the material is heated evenly during the molding process. Accurately control the temperature distribution and heat conduction behavior to reduce the internal stress and deformation caused by uneven expansion or contraction of the material, thereby improving the quality and performance of the molded product. Dynamically adjusting the cooling speed can speed up the heat dissipation rate, shorten the cooling time, and improve production efficiency. Optimize the layout of the heating and cooling system based on the thermal response characteristics of the material to reduce energy waste and reduce energy consumption in the production process.

[0061] The preliminary positioning of the sound insulation material in S2 is completed by the robotic arm. This embodiment realizes the preliminary positioning of the sound insulation material by the robotic arm, which effectively improves the positioning accuracy and operation efficiency of the material in the mold. The following is a specific description of its working principle: The robotic arm works with the visual sensor to collect information such as the shape, position and direction of the sound insulation material in real time. The visual sensor transmits the captured data to the robotic arm control system to generate accurate position information. The control system plans the optimal movement path of the robotic arm based on the position data of the material and the specific size and shape of the mold. The path planning adopts the inverse kinematics algorithm to ensure that the robotic arm can complete the movement and positioning of the material in the shortest time with the minimum energy consumption. The end of the robotic arm is equipped with a flexible clamping device for grasping and releasing the sound insulation material. The flexible clamping device adjusts the clamping force in real time through the pressure sensor to avoid damage to the surface of the material and ensure the stability of the grasping. After the robotic arm moves the material to the mold area, it completes the preliminary positioning of the material by slowly adjusting the position and angle. During the positioning process, the visual sensor continuously monitors the actual position of the material and compares it with the preset target position. If an error is found, the control system will adjust the movement path and clamping angle of the robot arm in real time to ensure that the material is accurately placed in the specified position in the mold. Through the above steps, the robot arm achieves high-precision positioning of the sound insulation material, laying the foundation for the subsequent pressing and molding steps. The robot arm combines with visual sensors to achieve dynamic adjustment to ensure that the initial positioning error of the sound insulation material is minimized. Compared with manual operation, the robot arm has a faster positioning speed and can significantly shorten the production cycle. The robot arm can flexibly adjust the gripping and positioning methods according to the material size, shape and mold requirements to adapt to various production needs. Through flexible clamping devices and pressure control, scratches or deformation of the surface of the sound insulation material are avoided, improving product quality. Combined with intelligent control and sensor feedback, the entire positioning process does not require human intervention and is highly automated.

[0062] The pressing device in S3 includes a multi-point pressure distribution unit, which adjusts the size and distribution of the applied pressure in real time according to the change of material thickness. This embodiment solves the problem of material forming defects caused by uneven pressure in the traditional pressing method by dynamically adjusting the size and distribution of the applied pressure by the multi-point pressure distribution unit. The following is a description of the specific working principle: The multi-point pressure distribution unit of the pressing device is composed of multiple independent pressure execution units, each of which is equipped with a pressure sensor and a servo controller. The pressure sensor is used to detect the force of the material in real time, and the servo controller adjusts the size and direction of the applied pressure according to the sensor feedback signal. During the pressing process, the thickness sensor monitors the thickness change of the sound insulation material in real time and generates accurate thickness distribution data. The control system calculates the pressure requirement of each position based on the data to ensure that the material can obtain appropriate pressure in different thickness areas. The control system dynamically adjusts the pressure mode of the multi-point pressure distribution unit by analyzing the thickness data and forming requirements. For example, for thicker areas, the system will increase the applied pressure to ensure sufficient forming; while for thinner areas, the pressure is reduced to avoid material damage or indentation. The multi-point pressure distribution unit forms a distributed pressure mechanism by independently controlling each pressure point. This mechanism ensures that the pressure is evenly distributed over the entire mold surface, effectively reducing the problem of excessive or insufficient local pressure that is common in traditional centralized pressure methods. This implementation method is combined with a closed-loop control system to dynamically adjust the parameters during the pressure application process by real-time monitoring of pressure and thickness changes to ensure that the material molding quality and equipment operating efficiency are optimal. Dynamic adjustment of pressure distribution effectively reduces the problem of stress concentration inside the material and ensures the thickness uniformity and surface finish of the sound insulation pad. The device is suitable for sound insulation materials of different thicknesses and densities, and the pressure parameters can be flexibly adjusted according to specific needs. The distributed pressure mechanism reduces the rework or scrap rate of materials caused by uneven pressure and improves production efficiency. The multi-point pressure distribution unit can avoid excessive wear on the mold or equipment caused by concentrated pressure, thereby extending the service life of the equipment. Combined with thickness monitoring and real-time feedback systems, the entire pressing process is highly intelligent and automated.

[0063] The preliminary positioning in S2 is combined with the multi-point laser sensor to detect the surface morphological characteristics of the material, which is used to correct the initial placement position of the material. In this embodiment, the surface morphological characteristics of the sound insulation material are detected by a multi-point laser sensor, and the initial placement position of the material is corrected in combination with an intelligent control system to improve the accuracy of the preliminary positioning. The following is a description of the specific working principle: The multi-point laser sensor is arranged above the working area of ​​the robot arm to scan the surface morphological characteristics of the material, including thickness distribution, surface concave and convex and edge shape. The sensor collects geometric data on the surface of the material through multi-point laser reflection and generates a three-dimensional morphological map. The control system compares the surface morphological data collected by the sensor with the preset standard morphological model. Through morphological feature analysis, the actual placement state of the material is determined, including position, angle and surface flatness deviation. According to the surface morphological analysis results, the control system corrects the initial placement position of the material by adjusting the gripping position and motion path of the robot arm. Specifically, if there is a deviation between the edge of the material and the reference position of the mold, the robot arm will ensure that the placement position of the material and the mold are aligned by moving the angle of the material or re-adjusting the gripping point. The multi-point laser sensor continuously monitors the surface feature data during the movement of the material and updates the positioning parameters of the control system in real time. If the material undergoes secondary offset during the correction process, the system will dynamically adjust the movement path of the robot arm until the material is completely aligned with the mold. This implementation method combines closed-loop control technology and continuously optimizes the operating accuracy of the robot arm through real-time data feedback from the laser sensor to ensure that the initial placement of the material fully meets the molding requirements. The multi-point laser sensor can accurately detect the surface morphology characteristics of the material, and combined with the intelligent correction function, the initial positioning error of the material is minimized. This method is suitable for sound insulation materials with complex surface morphology, such as multi-layer composite materials or materials with concave and convex structures, to ensure that they are accurately placed in the mold. The automated positioning correction process does not require human intervention, which greatly shortens the time for initial positioning of the material and improves production efficiency. The non-contact detection of the laser sensor avoids scratches or damage caused by direct contact of the sensor or robot arm with the material surface. Accurate initial positioning provides reliable protection for subsequent pressing and molding processes, avoiding molding defects caused by material placement deviations.

[0064] The initial values ​​of α and γ in S3 are calibrated by experiments. This embodiment determines the initial values ​​of parameters α and γ during the pressing process by an experimental calibration method, ensures the accuracy of the pressing pressure model, and provides basic data support for optimizing the working parameters of the equipment. The following is a description of the specific working principle: α: represents the weight of the influence of material properties on pressure distribution. It mainly reflects the properties of the material, such as density and elastic modulus, and the degree of effect on pressure during the pressing process. Γ: represents the weight of the influence of equipment performance on pressure distribution. It mainly involves the technical parameters of the equipment, such as the strength of the pressure head and the accuracy of servo control, on the pressure. The initial values ​​of α and γ are calibrated by experiments to ensure that the parameters in the model are consistent with the actual production conditions. The specific steps are as follows. Material property test: Experiments are conducted on sound insulation materials to measure key characteristic data such as density, elastic modulus and thermal deformation coefficient, and calculate the degree of influence on pressure distribution, so as to preliminarily determine the value range of α. Equipment performance test: Test the pressing equipment, record data such as pressure head strength, pressure accuracy and distribution stability, analyze the influence of equipment performance on pressure, and determine the initial value range of γ. Experimental calibration: Under actual pressing conditions, multiple sets of experimental data are used for fitting, combined with the pressing pressure formula , the initial values ​​of α and γ are determined by regression analysis or optimization algorithm. After calibration, the deviation between the model-calculated pressure and the actual pressing effect is verified by substituting the initial values ​​into the pressure model. If the deviation is within the allowable range, the calibrated initial value can be directly applied to production; otherwise, the calibration experimental parameters are further adjusted until the requirements are met. In the production process, according to the differences in material batches or changes in equipment performance, α and γ are dynamically adjusted in combination with online monitoring data to ensure the real-time adaptability of the model parameters. By experimentally calibrating the initial values ​​of α and γ, the pressure model is more in line with the actual production conditions and the accuracy of the model calculation results is improved. By calibrating the weights of material properties and equipment performance respectively, the pressure distribution optimization under different material and equipment conditions is ensured to be more accurate. The calibrated initial values ​​can be used as the basis for optimizing parameters, greatly reducing quality problems caused by improper parameter settings during the pressing process and improving the stability of the production process. The experimental calibration method provides accurate reference data for subsequent production, reduces the trial and error time caused by parameter adjustment, and improves production efficiency.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical pressing and molding method for a ventilation cover sound insulation pad, characterized in that: The method comprises: S1. Adjust the heating and cooling system layout of the molding area based on the thermal deformation characteristics of the material to control the temperature, including simulating the temperature change behavior in the heating and cooling system layout. The specific formula is: ； ； ； Among them, x represents the difference in local temperature distribution inside the ventilation cover sound insulation pad material, t represents time, σ represents the heat transfer rate inside the material or in the heating and cooling system, y represents the distribution of heat flow in the molding area, ρ represents the energy difference of heat flow in the heating and cooling system, z represents the comprehensive influence of the external environment on the internal temperature of the material, and β represents the ability of the material or the heating and cooling system to dissipate heat; Adjust the parameters σ, ρ, and β to optimize the heat flow layout, monitor and adjust the output of the heating or cooling element in real time to avoid thermal deformation. S1 also includes monitoring and recording the shrinkage and expansion coefficients of the material in different temperature ranges, determining the location and range of the heating and cooling areas based on the monitored shrinkage and expansion coefficients, and dividing the heating and cooling system layout into multiple independent controllable temperature zones. When λ≥k1, increase the cooling rate of the corresponding temperature zone to c+Δc, where h represents the material thickness, λ represents the thermal conductivity, k1 represents the set thermal conductivity threshold, and Δc represents the cooling rate increment; S2, placing the pretreated sound insulation material in the mold and performing preliminary positioning; S3, starting the pressing device to apply a predetermined pressure and compact the material; S4. After the pressing is completed, the formed ventilation cover sound insulation pad is automatically cooled and taken out.

2. The mechanical pressing and molding method of the ventilation cover sound insulation pad according to claim 1 is characterized in that: The S2 includes: Model the material pretreatment position and mold area, describe the material transfer process from the starting position to the final positioning state, calculate the transfer probability, and select the optimal path to place the material in the mold. The specific formula is: ＝ ； Among them, X n represents the position or state of the material at the nth time step, X n+1 represents the target position or state of the material at the n+1th time step, x represents the position parameter of the material, Indicates that the material is from the current state Transfer to next state The probability of X0 represents the starting position of the material, n represents the number of time steps of the positioning process, and x n Represents the specific state value of the material at time step n; Combining visual sensors with robotic arm control, the material position is dynamically adjusted according to the transfer path to complete the initial positioning.

3. The mechanical pressing and molding method of the ventilation cover sound insulation pad according to claim 1 is characterized in that: The S3 includes: The pressing pressure, material density and equipment performance are modeled as follows: ; Among them, F represents the pressing pressure, A represents the comprehensive technical efficiency of the pressing equipment, L represents the material density, K represents the equipment performance, α represents the influence weight of the material attribute, and γ represents the influence weight of the equipment performance; Adjust the values ​​of A, α, and γ to optimize the working parameters of the pressing equipment to ensure maximum pressing efficiency while preventing material damage.

4. The mechanical pressing and forming method of the ventilated cover sound insulation pad according to claim 1, characterized in that: The S4 includes: Simulate the flow characteristics of cooling gas on the mold surface. The specific formula is: H = avG / μ; Wherein, H represents the characteristic value of the cooling airflow flowing on the mold surface, a represents the density of the cooling gas, v represents the speed of the cooling airflow flowing on the mold surface, G represents the size of the mold cooling area, and μ represents the dynamic viscosity coefficient of the cooling gas; Optimize the cooling air flow speed and direction, monitor the cooling effect in real time through the mold temperature sensor, and when the temperature reaches the specified range, the robot automatically removes the sound insulation pad.

5. The mechanical pressing and forming method of the ventilation cover sound insulation pad according to claim 1, characterized in that: The preliminary positioning of the sound insulation material in S2 is completed by a robotic arm.

6. The mechanical pressing and forming method of the ventilation cover sound insulation pad according to claim 1, characterized in that: The pressing device in S3 includes a multi-point pressure distribution unit, and the multi-point pressure distribution unit adjusts the size and distribution of the applied pressure in real time according to the change of material thickness.

7. The mechanical pressing and forming method of the ventilation cover sound insulation pad according to claim 2, characterized in that: The preliminary positioning in S2 is combined with a multi-point laser sensor to detect the surface morphological characteristics of the material, which is used to correct the initial placement position of the material.

8. The mechanical pressing and forming method of the ventilation cover sound insulation pad according to claim 3, characterized in that: The initial values ​​of α and γ in S3 are calibrated through experiments.

9. The mechanical pressing and forming method of the ventilation cover sound insulation pad according to claim 1, characterized in that: The speed v of the cooling airflow flowing on the mold surface in S4 is controlled by a variable frequency fan to achieve zoned regulation of the airflow speed.

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