Control system of powder pressing machine

Abstract

The invention relates to the field of powder pressing, and discloses a powder pressing machine control system which comprises a powder characteristic detection module, a temperature monitoring module, a pressure monitoring module and a self-adaptive control module which are in communication connection. The powder characteristic detection module is used for detecting the characteristics such as granularity, shape and hardness of metal powder before the metal powder enters the laminating machine, the temperature monitoring module is used for collecting temperature in real time through a temperature sensor in a mold, and the pressure monitoring module is used for monitoring pressure through a pressure sensor of the pressure part; the self-adaptive control module adjusts the pressing parameters based on the obtained information, comprehensive monitoring and parameter adjustment of the powder pressing machine are achieved, basic data support is provided for subsequent accurate control, acquisition of basic working information and adjustability of the parameters of the powder pressing machine under different metal powder characteristics and different working conditions are ensured, and the working efficiency of the powder pressing machine is improved. The sensing ability of the system to various factors is improved, the adaptability and control scientificity of the system are enhanced, and the optimization of the overall performance of the powder pressing machine is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of powder pressing, and in particular to a control system of a powder pressing machine. Background Art

[0002] In the powder metallurgy industry, powder press is a key equipment, and the performance of its control system plays a decisive role in product quality and production efficiency. With the continuous expansion of the application field of metal products, more stringent requirements are put forward for the control system of powder press, but there are many problems in the existing technology that need to be solved.

[0003] In terms of metal dust treatment, metal powder is very likely to generate a large amount of dust during the pressing process. These dusts will not only permeate the working environment, causing serious damage to the respiratory system of operators, but long-term exposure may cause occupational diseases such as pneumoconiosis, and the accumulation of dust will seriously affect the normal operation of the equipment. For example, dust entering the transmission parts of the equipment will accelerate the wear of the parts and reduce the service life of the equipment; entering the electrical system may cause faults such as short circuits, affecting the continuity of production. What is more serious is that some metal dusts are flammable and explosive. Once a certain concentration is reached, it may cause an explosion when encountering open flames or static electricity, which brings huge safety hazards to enterprises, and the existing control systems generally lack effective metal dust treatment mechanisms. Specifically, Chinese patent number CN202211182576.5 discloses a method for calling and synchronously controlling the working mode of a powder forming servo press, but when it is applied to a powder pressing machine for metal powder, due to the unique characteristics of metal powders and the working requirements of the pressing machine, there are deficiencies in temperature control, pressure accuracy, and metal dust treatment.

[0004] In terms of adapting to powder characteristics, different types of metal powders have very different characteristics such as particle size distribution, shape, and hardness. Taking particle size as an example, fine-grained powder has poor fluidity and is difficult to evenly fill the mold during pressing, which can easily lead to uneven product density; coarse-grained powder may have problems such as large gaps during the pressing process. The existing control system cannot automatically and accurately adjust the pressing parameters such as pressure, speed, and time according to changes in powder characteristics, resulting in unstable product quality, high scrap rate, and difficulty in meeting diverse production needs.

[0005] In summary, a new technical solution for controlling a powder press for metal powder is urgently needed to solve the above technical problems. Summary of the invention

[0006] The purpose of this application is to provide a powder pressing machine control system to solve the technical problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present application discloses the following technical solutions: a powder pressing machine control system, the system comprising a powder property detection module, a temperature monitoring module, a pressure monitoring module and an adaptive control module connected in communication;

[0008] The powder property detection module is used to detect the properties of metal powder before the powder enters the press; wherein the metal powder properties include particle size, shape and hardness;

[0009] The temperature monitoring module is used to monitor the temperature in real time; wherein the temperature is collected by a temperature sensor installed in the mold of the powder pressing machine;

[0010] The pressure monitoring module is used to monitor the pressure of the powder press in real time; wherein the pressure is collected by a pressure sensor installed in the pressure part of the powder press;

[0011] The adaptive control module is used to adjust the pressing parameters of the powder pressing machine using the metal powder characteristics, temperature monitoring data and pressure monitoring data; wherein the pressing parameters include pressing pressure, pressing speed and pressing time.

[0012] Preferably, the adjustment of the closing pressure parameters is as follows:

[0013] Obtain a preset database storing different metal powder properties and their corresponding pressing parameters, compare the powder property test results with the database information to determine the adjustment strategy, and dynamically adjust the pressing parameters in real time in combination with the temperature monitoring data and the pressure monitoring data. The real-time dynamic adjustment of the pressing parameters is:

[0014] The pressing pressure is adjusted dynamically in real time using the pressing pressure adjustment formula, which is:

[0015]

[0016] Where P is the pressure monitoring data, ΔP is the pressing pressure adjustment parameter obtained based on the error value of the last pressure adjustment, n is the number of adjustments determined based on the powder characteristics, T is the temperature monitoring data, T tar is the target temperature, P tar is the target pressure, P adj The calculated real-time dynamically adjusted pressing pressure value;

[0017] The pressing speed adjustment formula is used to perform real-time dynamic adjustment of the pressing speed, and the pressing speed adjustment formula is:

[0018]

[0019] Where V is the current pressing speed, ΔV is the speed adjustment parameter obtained based on the error value of the last speed adjustment, m is the number of adjustments determined based on the powder characteristics, and V adj The pressing speed value is calculated and adjusted dynamically in real time;

[0020] The pressing time adjustment formula is used to perform real-time dynamic adjustment of the pressing time, and the pressing time adjustment formula is:

[0021]

[0022] Where t is the current pressing time, Δt is the time adjustment parameter obtained based on the error value of the last time adjustment, k is the number of adjustments determined based on the powder characteristics, and t adj It is the calculated real-time dynamically adjusted suppression time value.

[0023] Preferably, the metal powder properties are detected using a preset particle size analyzer, scanning electron microscope and hardness tester.

[0024] Preferably, the adaptive control module controls the temperature based on adjusting the power of the heating or cooling system; wherein the adjustment of the power of the heating or cooling system is:

[0025] The adjustment of the heating or cooling system power is calculated using the temperature control power adjustment formula, which is:

[0026]

[0027] Where Q is the current power, ΔQ is the power adjustment parameter obtained based on the error value of the last power adjustment, h is the number of adjustments determined based on the powder characteristics, ΔT is the change value of the temperature monitoring data itself, and ΔT τ is the change in the difference between the temperature monitoring data and the target temperature, Q adj It is the temperature control power adjustment value of the calculated heating or cooling system power.

[0028] Preferably, when the temperature monitoring module detects that the temperature fluctuation is greater than a preset temperature fluctuation threshold, a similarity analysis is performed on the change of the temperature control power adjustment value and the change of the historical temperature control power adjustment value. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that there is a powder pressing anomaly, and the powder pressing anomaly includes at least equipment failure and powder distribution abnormality.

[0029] Preferably, when the pressure monitoring module detects that the pressing pressure fluctuation is greater than a preset pressing pressure fluctuation threshold, the frequency of collecting pressure monitoring data is increased, and the pressing pressure is fine-tuned using a pressing pressure step formula, where the pressing pressure step formula is:

[0030]

[0031] Where step_A is a step set consisting of step step_a, and A = [1, 2, ..., a], ∑ A ΔP step_A It means to sum the error values ​​generated when adjusting step_a in the step set, P τ is the preset step-by-step pressing pressure adjustment base value, g is the number of adjustments determined based on powder characteristics, T is the temperature monitoring data, T tar is the target temperature, P is the pressure monitoring data, P tar is the target pressure, ΔP adj_step_a It is the calculated pressing pressure fine-tuning value.

[0032] Preferably, when the particle size change detected by the powder property detection module is greater than a preset particle size change threshold, the adaptive control module performs a similarity analysis on the changes in ΔP, ΔV and Δt and their respective corresponding historical adjustment values, and when the obtained similarity is less than or equal to the preset similarity threshold, it is determined that the powder press needs to be adjusted.

[0033] Preferably, when the hardness change detected by the powder property detection module is greater than a preset hardness change threshold, the adaptive control module performs a similarity analysis on the changes in ΔP, ΔV and Δt and their respective corresponding historical adjustment values, and when the obtained similarity is less than or equal to the preset similarity threshold, it is determined that the powder press needs to be adjusted.

[0034] Preferably, the system also includes a metal dust processing module, which is used to collect and purify metal dust, and the metal dust processing module includes at least a dust hood installed at a dust-prone part of the powder press, a sealed pipe connecting the dust hood, a dust pre-processor, a pulse bag dust collector and an automatic pulse cleaning device.

[0035] Preferably, the metal dust processing module is also used for air monitoring in the powder press workshop, and the metal dust processing module also includes air monitoring equipment distributed in the powder press workshop. When it is determined that there is an abnormality in powder pressing or it is determined that the powder press needs to be adjusted, the air monitoring strategy is updated, and the update of the strategy at least includes increasing the monitoring range and lowering the threshold of the monitoring indicator used for monitoring.

[0036] Beneficial effect: The powder press control system of the present application utilizes a powder property detection module, a temperature monitoring module, a pressure monitoring module and an adaptive control module that are communicatively connected to construct a powder press control system. The powder property detection module detects the particle size, shape, hardness and other properties of the metal powder before it enters the press. The temperature monitoring module collects the temperature in real time through the temperature sensor in the mold. The pressure monitoring module monitors the pressure by the pressure sensor in the pressure part. The adaptive control module adjusts the pressing parameters based on the obtained information, thereby realizing comprehensive monitoring and parameter adjustment of the powder press, providing basic data support for subsequent precise control, ensuring the acquisition of basic working information and parameter adjustability of the powder press under different metal powder properties and different working conditions, improving the system's perception of various factors, enhancing the system's adaptability and scientific control, and helping to optimize the overall performance of the powder press. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is a structural block diagram of the powder press control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0040] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0041] This embodiment discloses Figure 1 A powder pressing machine control system is shown, the system includes a powder property detection module, a temperature monitoring module, a pressure monitoring module and an adaptive control module which are communicatively connected;

[0042] The powder property detection module is used to detect the properties of metal powder before the powder enters the press; the metal powder properties include particle size, shape and hardness;

[0043] The temperature monitoring module is used to monitor the temperature in real time; the temperature is collected by a temperature sensor installed in the mold of the powder pressing machine;

[0044] The pressure monitoring module is used to monitor the pressure of the powder press in real time; wherein the pressure is collected by a pressure sensor installed in the pressure part of the powder press;

[0045] The adaptive control module is used to adjust the pressing parameters of the powder pressing machine using metal powder characteristics, temperature monitoring data and pressure monitoring data; wherein the pressing parameters include pressing pressure, pressing speed and pressing time.

[0046] Based on the above, this embodiment utilizes the powder property detection module, temperature monitoring module, pressure monitoring module and adaptive control module that are communicatively connected to construct a powder press control system, which detects the particle size, shape, hardness and other properties of the metal powder before entering the press through the powder property detection module, the temperature monitoring module collects the temperature in real time through the temperature sensor in the mold, the pressure monitoring module relies on the pressure sensor of the pressure part to monitor the pressure, and the adaptive control module adjusts the pressing parameters based on the obtained information, thereby realizing comprehensive monitoring and parameter adjustment of the powder press, providing basic data support for subsequent precise control, ensuring the acquisition of basic working information and parameter adjustability of the powder press under different metal powder properties and different working conditions, improving the system's perception of various factors, enhancing the system's adaptability and scientific control, and helping to optimize the overall performance of the powder press.

[0047] Specifically, the adjustment of the closing pressure parameters is:

[0048] Obtain a preset database storing different metal powder properties and their corresponding pressing parameters, compare the powder property test results with the database information to determine the adjustment strategy, and dynamically adjust the pressing parameters in real time in combination with the temperature monitoring data and the pressure monitoring data. The real-time dynamic adjustment of the pressing parameters is:

[0049] The pressing pressure adjustment formula is used to perform real-time dynamic adjustment of the pressing pressure. The pressing pressure adjustment formula is:

[0050]

[0051] Where P is the pressure monitoring data, ΔP is the pressing pressure adjustment parameter obtained based on the error value of the last pressure adjustment, n is the number of adjustments determined based on the powder characteristics, T is the temperature monitoring data, T tar is the target temperature, P taris the target pressure, P adj The calculated real-time dynamically adjusted pressing pressure value;

[0052] The pressing speed adjustment formula is used to perform real-time dynamic adjustment of the pressing speed. The pressing speed adjustment formula is:

[0053]

[0054] Where V is the current pressing speed, ΔV is the speed adjustment parameter obtained based on the error value of the last speed adjustment, m is the number of adjustments determined based on the powder characteristics, and V adj The pressing speed value is calculated and adjusted dynamically in real time;

[0055] The pressing time adjustment formula is used to adjust the pressing time in real time and dynamically. The pressing time adjustment formula is:

[0056]

[0057] Where t is the current pressing time, Δt is the time adjustment parameter obtained based on the error value of the last time adjustment, k is the number of adjustments determined based on the powder characteristics, and t adj It is the calculated real-time dynamically adjusted suppression time value.

[0058] In the actual application of the powder press, periodic quality inspection or failure is often used as an indicator for maintaining the powder press. However, it is understandable that, for metal powder, the wear of the powder press on the powder press is not only reflected in periodic quality inspection or failure. Therefore, when adjusting the pressing parameters, this embodiment is designed to calculate ΔP, ΔV and Δt, so as to continuously update the execution of the instructions by the powder press, and combine with the judgment of the particle size change and hardness change in the following text, to provide a basis for the maintenance of the powder press in addition to periodic quality inspection or failure, thereby improving the maintenance quality of the powder press while improving the control quality of the powder press.

[0059] Based on the above, this embodiment uses a preset database to store different metal powder characteristics and their corresponding pressing parameters, compares the powder characteristic detection results with the database information, and combines the temperature and pressure monitoring data to perform real-time dynamic adjustments through specific pressing pressure, speed and time adjustment formulas. Dynamic optimization of pressing parameters based on powder characteristics, real-time temperature and pressure monitoring conditions is achieved, so that the pressing pressure, speed and time of the pressing machine can be automatically adjusted according to actual working conditions, avoiding unstable pressing quality caused by fixed parameters, improving product quality, and reducing errors and uncertainties caused by manual intervention. The automation and adaptability of the powder pressing machine control system are enhanced to better meet production requirements under different metal powders and different processing requirements.

[0060] Specifically, the metal powder characteristics are tested using a preset particle size analyzer, a scanning electron microscope, and a hardness tester.

[0061] Based on the above, this embodiment uses the existing particle size analyzer, scanning electron microscope and hardness tester to detect the metal powder characteristics. It realizes the accurate detection of the metal powder particle size, shape and hardness, ensures that the powder characteristic detection module can accurately obtain the key information of the metal powder, provides an accurate basis for the subsequent adjustment of the pressing parameters, helps to improve the adaptability of the powder pressing machine control system to different metal powders, enables the system to make reasonable adjustments according to the actual situation of the powder, ensures that the subsequent control links are operated based on accurate information, and improves the reliability of the system and the stability of product quality.

[0062] Specifically, the adaptive control module controls the temperature based on the adjustment of the power of the heating or cooling system; wherein the adjustment of the power of the heating or cooling system is:

[0063] The adjustment of the heating or cooling system power is calculated using the temperature control power adjustment formula. The temperature control power adjustment formula is:

[0064]

[0065] Where Q is the current power, ΔQ is the power adjustment parameter obtained based on the error value of the last power adjustment, h is the number of adjustments determined based on the powder characteristics, ΔT is the change value of the temperature monitoring data itself, and ΔT τ is the change in the difference between the temperature monitoring data and the target temperature, Q adj It is the temperature control power adjustment value of the calculated heating or cooling system power.

[0066] It is understandable that temperature has a direct impact on the quality of powder pressing, so it is necessary to accurately adjust the temperature control power adjustment value. The existing temperature control power adjustment is mostly controlled by PID control technology to accurately reach the target value. However, in actual applications, it is found that in addition to controlling the temperature control power to accurately reach the target value, how to find the accurate target value is a problem that has not been effectively solved in the prior art. This embodiment designs a method based on ΔQ, ΔT and ΔT τ The multi-dimensional temperature control power adjustment calculation is designed to achieve the calculation of the temperature control power adjustment target taking into account the aging of the temperature control equipment, the actual temperature change, and the difference between the actual temperature and the target temperature, so as to optimize the temperature control and provide a basis for improving the quality of powder pressing.

[0067] Based on the above, this embodiment uses the temperature control power adjustment formula to adjust the power of the heating or cooling system. By combining the current power, the number of adjustments based on the powder characteristics, the temperature monitoring data and its change amount, etc., the power of the heating or cooling system is accurately adjusted, and then the temperature of the powder pressing machine mold is effectively controlled, ensuring that the mold temperature is within a reasonable range during the powder pressing process, which helps to improve the formability of the metal powder, reduce product quality problems caused by temperature fluctuations, and improve the temperature stability of the powder pressing machine under different working conditions and the consistency of product quality.

[0068] Specifically, when the temperature monitoring module detects that the temperature fluctuation is greater than the preset temperature fluctuation threshold, a similarity analysis is performed on the change of the temperature control power adjustment value and the change of the historical adjustment value of the temperature control power. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that there is a powder pressing anomaly, and the powder pressing anomaly includes at least equipment failure and powder distribution abnormality.

[0069] Based on the above, when the temperature monitoring module detects that the temperature fluctuation is greater than the preset threshold, this embodiment performs similarity analysis on the changes in the temperature control power adjustment value and the historical adjustment value. The determination of powder pressing abnormality is realized. By comparing the similarity and the preset threshold, possible equipment failures and powder distribution abnormalities can be discovered in time, which improves the fault detection capability of the system, ensures the safe and stable operation of the powder pressing machine, avoids product quality degradation and equipment damage caused by abnormal conditions, and reduces production risks and economic losses caused by failure to discover abnormalities in time.

[0070] Specifically, when the pressure monitoring module detects that the pressing pressure fluctuation is greater than the preset pressing pressure fluctuation threshold, the collection frequency of the pressure monitoring data is increased, and the pressing pressure is fine-tuned using the pressing pressure step formula, and the pressing pressure step formula is:

[0071]

[0072] Where step_A is a step set consisting of step step_a, and A = [1, 2, ..., a], ∑ A ΔP step_A It means to sum the error values ​​generated when adjusting step_a in the step set, P τ is the preset step-by-step pressing pressure adjustment base value, g is the number of adjustments determined based on powder characteristics, T is the temperature monitoring data, T tar is the target temperature, P is the pressure monitoring data, P tar is the target pressure, ΔP adj_step_a It is the calculated pressing pressure fine-tuning value.

[0073] It should be noted that the pressing pressure is the variable that most directly affects the quality of powder pressing, and pressure fluctuations will directly lead to a decrease in the pressing quality. In the extensive pressing pressure, the pressing pressure is only regulated once, which cannot actually meet more complex pressing requirements. Therefore, this embodiment designs a pressing pressure step formula to achieve more detailed pressing control by adjusting the pressing pressure adjustment base value formulated using powder characteristics and the experience known to those skilled in the art.

[0074] Based on the above, when the pressure monitoring module detects that the pressing pressure fluctuation is greater than the preset threshold, this embodiment increases the frequency of pressure monitoring data acquisition and uses the pressing pressure step formula to fine-tune the pressing pressure. Accurate adjustment of the pressing pressure is achieved. By considering factors such as step set, error value, adjustment times, temperature and pressure monitoring data, it can respond quickly when the pressure fluctuates, ensure the stability of the pressing pressure, improve the system's ability to respond to pressing pressure fluctuations, and ensure the pressure stability of the pressing process, thereby ensuring the stability and consistency of product quality.

[0075] Specifically, when the particle size change detected by the powder property detection module is greater than the preset particle size change threshold, the adaptive control module performs a similarity analysis on the changes in ΔP, ΔV and Δt and their corresponding historical adjustment values. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that the powder press needs to be adjusted.

[0076] Based on the above, when the powder characteristic detection module detects that the change in particle size is greater than a preset threshold, this embodiment performs similarity analysis on the changes in the relevant parameters and their historical adjustment values. This enables the determination of whether the powder press needs to be adjusted, and can detect the adaptability of the system in a timely manner according to the change in powder particle size, thereby improving the system's sensitivity to changes in powder particle size, avoiding loss of control of the pressing process due to changes in particle size, and ensuring that the system can adjust the working state in a timely manner according to changes in particle size, thereby ensuring product quality and production continuity.

[0077] Specifically, when the hardness change detected by the powder property detection module is greater than the preset hardness change threshold, the adaptive control module performs a similarity analysis on the changes in ΔP, ΔV and Δt and their corresponding historical adjustment values. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that the powder press needs to be adjusted.

[0078] Based on the above, when the powder characteristic detection module detects that the hardness change is greater than the preset threshold, this embodiment performs similarity analysis on the changes in the relevant parameters and their historical adjustment values. This enables the determination of whether the powder press needs to be adjusted. By timely monitoring the hardness change, the system's ability to respond to the change in the hardness of the metal powder is improved, ensuring that the system can make corresponding adjustments based on the change in hardness, avoiding product quality problems caused by hardness changes, and improving the system's adaptability to metal powders of different hardness and the stability of product quality.

[0079] Specifically, the system also includes a metal dust processing module, which is used to collect and purify metal dust, and the metal dust processing module includes a dust hood installed at least at a dust-prone part of the powder press, a sealed pipe connecting the dust hood, a dust preprocessor, a pulse bag dust collector and an automatic pulse cleaning device.

[0080] Based on the above, this embodiment uses the metal dust treatment module and the dust hood, sealed duct, dust pre-processor, pulse bag dust collector and automatic pulse dust cleaning device included therein to collect and purify the metal dust. It realizes the effective treatment of the metal dust generated during the operation of the powder press, reduces the pollution of the metal dust to the environment and the harm to the health of the operators, and avoids the adverse effects of the metal dust on the equipment, ensures the safety of the working environment and the normal operation of the equipment, and improves the cleanliness of the production environment and the service life of the equipment.

[0081] Specifically, the metal dust processing module is also used to perform air monitoring in the powder press workshop, and the metal dust processing module also includes air monitoring equipment distributed in the powder press workshop. When it is determined that there is an abnormality in powder pressing or it is determined that the powder press needs to be adjusted, the air monitoring strategy is updated. The update of the strategy at least includes increasing the monitoring range and lowering the threshold of the monitoring indicator used for monitoring.

[0082] Based on the above, this embodiment uses the air monitoring equipment of the metal dust processing module to monitor the workshop air, and updates the monitoring strategy when it is determined that there is an abnormal powder pressing or the powder pressing machine needs to be adjusted. Dynamic adjustment of workshop air monitoring is achieved, and the monitoring capability of the workshop environment is enhanced by increasing the monitoring range and lowering the threshold of the monitoring index, which helps to timely discover potential environmental risks when the system is abnormal, further ensuring the safety and stability of the production process. At the same time, it can be used as an auxiliary means to judge system abnormalities, improving the comprehensive performance of the powder pressing machine control system.

[0083] In summary, the powder press control system of the present embodiment constructs a powder press control system by utilizing a powder property detection module, a temperature monitoring module, a pressure monitoring module and an adaptive control module that are communicatively connected. The powder property detection module detects the particle size, shape, hardness and other properties of the metal powder before it enters the press. The temperature monitoring module collects the temperature in real time through the temperature sensor in the mold. The pressure monitoring module monitors the pressure by the pressure sensor in the pressure part. The adaptive control module adjusts the pressing parameters based on the obtained information, thereby realizing comprehensive monitoring and parameter adjustment of the powder press, providing basic data support for subsequent precise control, ensuring the acquisition of basic working information and the adjustability of parameters of the powder press under different metal powder properties and different working conditions, improving the system's perception of various factors, enhancing the system's adaptability and scientific control, and helping to optimize the overall performance of the powder press.

[0084] In the embodiments provided in the present application, it should be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For hardware implementation, the processor can be implemented in one or more of the following units: application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other electronic units designed to implement the functions described herein or their combination. For software implementation, part or all of the flow of the embodiment can be completed by instructing the relevant hardware through a computer program. When implemented, the above program can be stored in a computer-readable storage medium or transmitted as one or more instructions or codes on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein the communication medium includes any medium that is convenient for transmitting a computer program from one place to another. The storage medium can be any available medium that a computer can access. The computer-readable storage medium can include but is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer.

[0085] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A powder press control system, characterized in that: The system includes a powder property detection module, a temperature monitoring module, a pressure monitoring module and an adaptive control module connected in communication; The powder property detection module is used to detect the properties of metal powder before the powder enters the press; wherein the metal powder properties include particle size, shape and hardness; The temperature monitoring module is used to monitor the temperature in real time; wherein the temperature is collected by a temperature sensor installed in the mold of the powder pressing machine; The pressure monitoring module is used to monitor the pressure of the powder press in real time; wherein the pressure is collected by a pressure sensor installed in the pressure part of the powder press; The adaptive control module is used to adjust the pressing parameters of the powder pressing machine using the metal powder characteristics, temperature monitoring data and pressure monitoring data; wherein the pressing parameters include pressing pressure, pressing speed and pressing time.

2. The powder compacting machine control system according to claim 1, characterized in that: The adjustment of the closing pressure parameters is: Obtain a preset database storing different metal powder properties and their corresponding pressing parameters, compare the powder property test results with the database information to determine the adjustment strategy, and dynamically adjust the pressing parameters in real time in combination with the temperature monitoring data and the pressure monitoring data. The real-time dynamic adjustment of the pressing parameters is: The pressing pressure is adjusted dynamically in real time using the pressing pressure adjustment formula, which is: Where P is the pressure monitoring data, ΔP is the pressing pressure adjustment parameter obtained based on the error value of the last pressure adjustment, n is the number of adjustments determined based on the powder characteristics, T is the temperature monitoring data, T tar is the target temperature, P tar is the target pressure, P adj The calculated real-time dynamically adjusted pressing pressure value; The pressing speed adjustment formula is used to perform real-time dynamic adjustment of the pressing speed, and the pressing speed adjustment formula is: Where V is the current pressing speed, ΔV is the speed adjustment parameter based on the error value of the last speed adjustment, m is the number of adjustments determined based on the powder characteristics, and V adj The pressing speed value is calculated and adjusted dynamically in real time; The pressing time adjustment formula is used to perform real-time dynamic adjustment of the pressing time, and the pressing time adjustment formula is: Where t is the current pressing time, Δt is the time adjustment parameter obtained based on the error value of the last time adjustment, k is the number of adjustments determined based on the powder characteristics, and t adj It is the calculated real-time dynamically adjusted suppression time value.

3. The powder compacting machine control system according to claim 1, characterized in that: The metal powder characteristics are tested using a preset particle size analyzer, a scanning electron microscope and a hardness tester.

4. The powder compacting machine control system according to claim 1, characterized in that: The adaptive control module controls the temperature based on the adjustment of the power of the heating or cooling system; wherein the adjustment of the power of the heating or cooling system is: The adjustment of the heating or cooling system power is calculated using the temperature control power adjustment formula, which is: Where Q is the current power, ΔQ is the power adjustment parameter obtained based on the error value of the last power adjustment, h is the number of adjustments determined based on the powder characteristics, ΔT is the change value of the temperature monitoring data itself, and ΔT τ is the change in the difference between the temperature monitoring data and the target temperature, Q adj It is the temperature control power adjustment value of the calculated heating or cooling system power.

5. The powder compacting machine control system according to claim 4, characterized in that: When the temperature monitoring module detects that the temperature fluctuation is greater than the preset temperature fluctuation threshold, a similarity analysis is performed on the change of the temperature control power adjustment value and the change of the historical temperature control power adjustment value. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that there is a powder pressing anomaly, and the powder pressing anomaly includes at least equipment failure and powder distribution abnormality.

6. The powder compacting machine control system according to claim 1, characterized in that: When the pressure monitoring module detects that the pressing pressure fluctuation is greater than the preset pressing pressure fluctuation threshold, the collection frequency of the pressure monitoring data is increased, and the pressing pressure is fine-tuned using the pressing pressure step formula, and the pressing pressure step formula is: Where step_A is a step set consisting of step step_a, and A = [1, 2, ..., a], ∑ A ΔP step_A It means to sum the error values ​​generated when adjusting step_a in the step set, P τ is the preset step-by-step pressing pressure adjustment base value, g is the number of adjustments determined based on powder characteristics, T is the temperature monitoring data, T tar is the target temperature, P is the pressure monitoring data, P tar is the target pressure, ΔP adj_step_a It is the calculated pressing pressure fine-tuning value.

7. The powder compacting machine control system according to claim 2, characterized in that: When the particle size change detected by the powder property detection module is greater than a preset particle size change threshold, the adaptive control module performs a similarity analysis on the changes in ΔP, ΔV and Δt and their corresponding historical adjustment values. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that the powder press needs to be adjusted.

8. The powder compacting machine control system according to claim 2, characterized in that: When the hardness change detected by the powder property detection module is greater than the preset hardness change threshold, the adaptive control module performs a similarity analysis on the changes in ΔP, ΔV and Δt and their corresponding historical adjustment values. When the obtained similarity is less than or equal to the preset similarity threshold, it is determined that the powder press needs to be adjusted.

9. The powder compacting machine control system according to claim 1, characterized in that: The system also includes a metal dust processing module, which is used to collect and purify metal dust, and the metal dust processing module includes a dust hood installed at least at a dust-prone part of the powder press, a sealed pipe connecting the dust hood, a dust preprocessor, a pulse bag dust collector and an automatic pulse cleaning device.

10. The powder compacting machine control system according to claim 5, 7 or 8, characterized in that: The metal dust processing module is also used for air monitoring in the powder press workshop, and the metal dust processing module also includes air monitoring equipment distributed in the powder press workshop. When it is determined that there is an abnormality in powder pressing or it is determined that the powder press needs to be adjusted, the air monitoring strategy is updated. The update of the strategy at least includes increasing the monitoring range and lowering the threshold of the monitoring indicator used for monitoring.

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