A method and system for monitoring a shot

Abstract

The embodiment of the application discloses a kind of injection monitoring methods, the method comprises: the first change condition of the temperature of the feeding cylinder on pressure casting machine is monitored;The second change condition of the temperature of hammer head on pressure casting machine is monitored;Based on the first change condition and / or the second change condition, it is determined whether the abnormality occurs in the injection process of the pressure casting machine.The embodiment of the application also discloses a kind of injection monitoring system.

Description

TECHNICAL FIELD

[0001] The present application relates to the monitoring technology in the monitoring field, and particularly relates to a pressure injection monitoring method and system. BACKGROUND

[0002] A die casting machine is used to inject liquid metal into a mold cavity of a mold through a pressure injection cylinder, so as to form a die casting; in order to ensure stable and efficient production of the die casting machine, the shape of the die casting obtained after the die casting machine performs a pressure injection action is observed according to human experience, so as to determine whether an abnormality occurs in the pressure injection process of the die casting machine; however, the above-mentioned method for determining whether an abnormality occurs in the pressure injection process of the die casting machine has the problems of low efficiency and low accuracy. SUMMARY

[0003] To solve the above technical problems, the embodiments of the present application expect to provide a pressure injection monitoring method and system, which solve the problem of low efficiency and low accuracy of the related art scheme for detecting whether an abnormality occurs in the pressure injection process of a die casting machine, improve the fault troubleshooting efficiency, and reduce the loss caused by the fault.

[0004] The technical scheme of the present application is implemented as follows:

[0005] A pressure injection monitoring method, the method comprising:

[0006] monitoring a first change condition of a temperature of a charging cylinder on a die casting machine;

[0007] monitoring a second change condition of a temperature of a hammer head on the die casting machine;

[0008] determining whether an abnormality occurs in a pressure injection process of the die casting machine based on the first change condition and / or the second change condition.

[0009] In the above scheme, the monitoring of the first change condition of the temperature of the charging cylinder on the die casting machine comprises:

[0010] detecting a first temperature of the charging cylinder by an infrared temperature sensor; wherein a distance between the infrared temperature sensor and the charging cylinder satisfies a target distance threshold;

[0011] determining the first change condition based on the first temperature.

[0012] In the above scheme, the determination of whether an abnormality occurs in the pressure injection process of the die casting machine based on the first change condition and / or the second change condition comprises:

[0013] In a case where the first change condition meets a first temperature change condition and the die casting machine does not receive a first injection instruction, it is determined that the die casting machine has a first abnormality in the injection process; wherein the first injection instruction is used to instruct the die casting machine to perform a first injection operation.

[0014] In a case where the first change condition meets a second temperature change condition and the die casting machine receives the first injection instruction, it is determined that the die casting machine has a second abnormality in the injection process.

[0015] In the above scheme, the determination of whether the die casting machine has an abnormality in the injection process based on the first change condition and / or the second change condition comprises:

[0016] In a case where the first change condition meets a second temperature change condition, the second change condition meets a third temperature change condition, and the first injection instruction is received, it is determined that the die casting machine has a second abnormality in the injection process; wherein the first injection instruction is used to instruct the die casting machine to perform a first injection operation.

[0017] In the above scheme, the method further comprises:

[0018] In a case where the die casting machine has a first abnormality or a second abnormality in the injection process, a second injection instruction is sent to the die casting machine; wherein the second injection instruction is used to instruct the die casting machine to perform a second injection operation; wherein the first injection operation and the second injection operation are different.

[0019] In the above scheme, the monitoring of the second change condition of the temperature of the hammer head of the die casting machine comprises:

[0020] The second temperature of the liquid at the hammer head cooling liquid inlet and the third temperature of the liquid at the hammer head cooling liquid outlet of the die casting machine are obtained;

[0021] Based on the second temperature and the third temperature, the second change condition is determined.

[0022] In the above scheme, the determination of whether the die casting machine has an abnormality in the injection process based on the first change condition and / or the second change condition comprises:

[0023] In a case where the second change condition meets a fourth temperature change condition, it is determined that the die casting machine has a third abnormality in the injection process; or,

[0024] The first oil pressure value of the hydraulic oil inlet of the die casting machine and the second oil pressure value of the hydraulic oil outlet of the die casting machine are obtained, and a third change condition between the first oil pressure value and the second oil pressure value is determined;

[0025] In a case where the second change condition is met and the third change condition is met, it is determined that the third abnormality occurs in the injection process of the die casting machine.

[0026] In the above solution, the method further comprises:

[0027] obtaining a first flow value of the liquid at the hammer head cooling liquid inlet of the die casting machine and a second flow value of the liquid at the hammer head cooling liquid outlet of the die casting machine;

[0028] determining a fourth change condition between the first flow value and the second flow value;

[0029] In a case where the fourth change condition is met, it is determined that the fourth abnormality occurs in the injection process of the die casting machine.

[0030] In the above solution, the determining whether the abnormality occurs in the injection process of the die casting machine based on the first change condition and / or the second change condition comprises:

[0031] determining a corresponding relationship between an injection parameter in the injection process of the die casting machine, a reference temperature threshold of the liquid at the hammer head cooling liquid inlet and a reference temperature threshold of the liquid at the hammer head cooling liquid outlet;

[0032] obtaining a current injection parameter in a current injection process of the die casting machine;

[0033] determining, based on the current injection parameter and the corresponding relationship, a first reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to the current injection parameter and a second reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to the current injection parameter;

[0034] determining whether the abnormality occurs in the injection process of the die casting machine based on the second change condition, the first reference temperature threshold and the second reference temperature threshold.

[0035] A die casting machine injection monitoring system, the system comprising:

[0036] a die casting machine configured to inject a metal liquid into a mold cavity of a mold through a hydraulic cylinder to obtain a die casting;

[0037] a controller connected to the die casting machine, configured to monitor a first change condition of a temperature of a charging cylinder on the die casting machine, monitor a second change condition of a temperature of a hammer head on the die casting machine, and determine whether an abnormality occurs in an injection process of the die casting machine based on the first change condition and / or the second change condition.

[0038] The injection monitoring method and system provided in the embodiments of this application monitor a first change in the temperature of the feed cylinder on the die-casting machine; monitor a second change in the temperature of the hammer on the die-casting machine; and determine whether an abnormality has occurred in the die-casting machine during the injection process based on the first and / or second changes in the temperature of the feed cylinder on the die-casting machine. Thus, by monitoring the first change in the temperature of the feed cylinder on the die-casting machine and / or the second change in the temperature of the hammer on the die-casting machine, it is possible to automatically determine whether an abnormality has occurred in the die-casting machine during the injection process, rather than relying on human experience to observe the shape of the die-casting part obtained after the die-casting machine performs the injection action to determine whether an abnormality has occurred in the injection process. This improves the efficiency and accuracy of determining whether an abnormality has occurred in the die-casting machine during the injection process, and solves the problems of low efficiency and low accuracy in related technologies for determining whether an abnormality has occurred in the die-casting machine during the injection process. Attached Figure Description

[0039] Figure 1 A schematic flowchart of a pressure injection monitoring method provided in an embodiment of this application;

[0040] Figure 2 A schematic flowchart of another injection monitoring method provided in this application embodiment;

[0041] Figure 3 A schematic flowchart illustrating another injection monitoring method provided in this application embodiment;

[0042] Figure 4 A schematic flowchart of a pressure injection monitoring method provided in another embodiment of this application;

[0043] Figure 5 A schematic flowchart illustrating another injection monitoring method provided in another embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the structure of a pressure injection monitoring system provided in one embodiment of this application;

[0045] Figure 7 A side view of the mounting position of an infrared temperature sensor in a pressure injection monitoring system according to an embodiment of this application;

[0046] Figure 8 An infrared temperature sensor in a pressure injection monitoring system provided in one embodiment of this application

[0047] Front view of the installation location. Detailed Implementation

[0048] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0049] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the application.

[0050] The embodiment of the application provides a shooting monitoring method, which can be applied to a shooting monitoring device, as shown in the figure, the method comprises the following steps: Figure 1

[0051] Step 101, monitoring the first change condition of the temperature of the feeding cylinder of the die casting machine.

[0052] The shooting monitoring device can be a device with data processing and control functions; in a feasible implementation manner, the shooting monitoring device can be a controller in a shooting monitoring system.

[0053] In the embodiment of the application, the first change condition of the temperature of the feeding cylinder of the die casting machine can be monitored in real time or periodically by the temperature sensor; in this way, the timeliness and effectiveness of monitoring the first change condition of the temperature of the feeding cylinder of the die casting machine can be ensured.

[0054] The temperature sensor can be a contact temperature sensor in contact with the feeding cylinder, or a non-contact temperature sensor not in contact with the feeding cylinder; when the temperature sensor is a contact temperature sensor in contact with the feeding cylinder, the maximum temperature measurement value in the range of the temperature sensor is greater than the temperature of the feeding cylinder after the metal liquid is injected; in this way, different temperature sensors can be flexibly selected to monitor the first change condition of the temperature of the feeding cylinder of the die casting machine.

[0055] In a feasible implementation manner, the temperature sensor can be an infrared temperature sensor not in contact with the feeding cylinder; the controller can be a programmable logic controller (PLC).

[0056] Step 102, monitoring the second change condition of the temperature of the hammer head of the die casting machine.

[0057] In the embodiment of the application, the temperature change between the inlet and outlet of the hammer head cooling liquid can be monitored in real time or periodically by the temperature sensor to obtain the second change condition. The temperature sensor can be a contact temperature sensor in contact with the hammer head, or a non-contact temperature sensor not in contact with the hammer head.

[0058] The die casting machine pressurizes the metal liquid in the feeding cylinder to be shot into a mold for cooling and forming, the hammer head in the die casting machine is an important component for high-speed shooting action in the pressure casting process; the hammer head is connected with the shooting rod of the die casting machine.

[0059] ​It should be noted that steps 101 and 102 can be executed simultaneously, or step 101 can be executed before step 102, or step 102 can be executed before step 101. In the embodiment of the present application, the execution order between steps 101 and 102 is not limited.

[0060] Step 103, determining whether the die casting machine has an abnormality in the injection process based on the first change condition and / or the second change condition.

[0061] The injection process is divided into two stages, specifically, an injection preparation stage before the execution of the injection action and an injection action execution stage.

[0062] In the embodiment of the present application, it can be determined whether the first change condition meets the first temperature change condition or the second temperature change condition to obtain a determination result, and the determination result and the state of the die casting machine are used to determine whether the die casting machine has an abnormality in the injection preparation stage. It can also be determined whether the first change condition meets the second temperature change condition and whether the second change condition meets the third temperature change condition to determine whether the die casting machine has an abnormality in the injection preparation stage. It can also be determined whether the second change condition meets the fourth temperature change condition to determine whether the die casting machine has an abnormality in the injection action execution stage. In this way, the temperature changes of different components of the die casting machine in the injection process are considered to determine whether the die casting machine has an abnormality in the injection preparation stage and / or the injection action execution stage based on the first change condition and / or the second change condition, improving the flexibility and accuracy of determining whether the die casting machine has an abnormality in the injection process.

[0063] The state of the die casting machine includes a state of receiving the first injection instruction or a state of not receiving the first injection instruction, and the first injection instruction is used to instruct the die casting machine to execute the first injection operation.

[0064] It should be noted that in the embodiment of the present application, the injection process is divided into two stages, and whether an abnormality occurs is determined when the die casting machine is in different stages, rather than determining whether an abnormality occurs in the injection process based on the obtained shape of the die casting part after the die casting machine has executed the injection action. The time for detecting whether an abnormality exists in the die casting machine during the injection process is advanced, that is, whether an abnormality occurs in the injection process can be determined during the injection process, rather than determining whether an abnormality exists in the injection process based on the obtained shape of the die casting part after the execution of the injection action as in the related art. The timeliness of detecting whether an abnormality occurs is ensured, timely troubleshooting is achieved, the troubleshooting efficiency is improved, and the loss caused by the fault is reduced.

[0065] The injection monitoring method provided by the embodiments of the present application monitors the first change condition of the temperature of the inlet cylinder on the die casting machine, monitors the second change condition of the temperature of the hammer head on the die casting machine, and determines whether an abnormality occurs in the die casting machine during the injection process based on the first change condition and / or the second change condition. In this way, whether an abnormality occurs in the die casting machine during the injection process can be automatically determined through the monitored first change condition of the temperature of the inlet cylinder on the die casting machine and / or the second change condition of the temperature of the hammer head on the die casting machine, instead of being determined according to the shape of the die casting part obtained after the die casting machine performs the injection action according to human experience, thereby improving the efficiency and accuracy of determining whether an abnormality occurs in the die casting machine during the injection process and solving the problems of time lag, low efficiency, and low accuracy of the scheme for detecting whether an abnormality occurs in the die casting machine during the injection process in the related art.

[0066] Based on the foregoing embodiments, the embodiments of the present application provide an injection monitoring method applied to an injection monitoring device, referring to FIG. 1, the method comprises the following steps: Figure 2

[0067] In step 201, the first temperature of the inlet cylinder is detected by an infrared temperature sensor.

[0068] The distance between the infrared temperature sensor and the inlet cylinder satisfies a target distance threshold value; the target distance threshold value is pre-set.

[0069] In the embodiments of the present application, the first temperature of the inlet cylinder can be periodically or real-time detected by the infrared temperature sensor. The infrared temperature sensor can be installed at a position that is spaced apart from the bottom of the inlet cylinder by a target distance threshold value. In this way, the infrared temperature sensor can detect the first temperature of the inlet cylinder as soon as the molten metal is injected into the inlet cylinder, thereby improving the accuracy and timeliness of detection.

[0070] In a feasible implementation manner, the first temperature of the inlet cylinder at a first time and the first temperature of the inlet cylinder at a second time can be obtained by the infrared temperature sensor; the infrared temperature sensor is installed at a parallel position on the side of the inlet cylinder, and the distance between the infrared temperature sensor and the bottom of the inlet cylinder satisfies a target distance threshold value; the first time is earlier than the second time.

[0071] In step 202, the first change condition is determined based on the first temperature.

[0072] In the embodiments of the present application, the first change condition can be obtained based on the change between the first temperatures of the inlet cylinder collected at adjacent times.

[0073] In a feasible implementation manner, the difference between the first temperature of the inlet cylinder at the first time and the first temperature of the inlet cylinder at the second time can be calculated to obtain the first change condition.​

[0074] It should be noted that steps 203 to 204 or steps 205 to 206 can be executed after step 202.

[0075] Step 203: If the first change condition meets the first temperature change condition and the die-casting machine does not receive the first injection command, it is determined that the die-casting machine has experienced a first abnormality during the injection process.

[0076] The first injection command is used to instruct the die-casting machine to perform the first injection operation; the first temperature change condition can be that the temperature change range is within the first temperature change threshold range.

[0077] In this embodiment of the application, during the injection preparation stage, when the temperature change range of the feed cylinder characterized by the first change condition between adjacent times meets the first temperature change threshold range, it is determined that the first change condition meets the first temperature change condition. At this time, it indicates that molten metal has been injected into the feed cylinder. If it is detected that the die casting machine has not received the first injection command sent by the molten metal feeder or the quantitative furnace, it is determined that the die casting machine has experienced a first abnormality during the injection preparation stage.

[0078] In one feasible implementation, the first anomaly may be caused by a malfunction in the feeder or metering furnace during the injection preparation stage, or by a malfunction in the first transceiver on the die-casting machine used to receive the feeder or metering furnace.

[0079] It should be noted that if the first abnormality occurs during the injection preparation stage of the die-casting machine and is not dealt with in time, the molten metal will drop to the solidification point, the feed cylinder will be scrapped, and other components such as the mold will need to be disassembled, resulting in increased maintenance time and costs.

[0080] Step 204: If the first abnormality occurs during the injection process of the die casting machine, send a second injection command to the die casting machine.

[0081] The second injection command is used to instruct the die-casting machine to perform a second injection operation; the first injection operation and the second injection operation are different.

[0082] In this embodiment, the injection speed of the die-casting machine performing the first injection operation is greater than the injection speed of the die-casting machine performing the second injection operation; the first injection operation can be referred to as a fast injection operation, and the second injection operation can be referred to as a slow injection operation; if a first abnormality occurs during the injection preparation stage of the die-casting machine, a second injection command is sent to the die-casting machine, enabling the die-casting machine to respond to the second injection command and execute the second injection operation. The injection monitoring device can be connected to the second transceiver of the die-casting machine.

[0083] It should be noted that the infrared temperature sensor is used to monitor whether there is molten metal in the feeding cylinder, and in the case that there is molten metal in the feeding cylinder and no first injection instruction is received, the second injection instruction can be sent by the injection monitoring device to the die casting machine to control the die casting machine to perform the slow injection action, so as to avoid damage to the feeding cylinder and the mold, thereby improving the safety and stability of the die casting machine during the injection process.

[0084] In step 205, in the case that the first change condition satisfies the second temperature change condition and the die casting machine receives the first injection instruction, it is determined that the second abnormality occurs in the injection process of the die casting machine.

[0085] The second temperature change condition can be that the temperature change range of the feeding cylinder is in the second temperature change threshold range or that the temperature does not change.

[0086] In the embodiment of the present application, in the injection preparation stage, in the case that the temperature change range of the feeding cylinder between adjacent times represented by the first change condition satisfies the second temperature change threshold range or that the temperature of the feeding cylinder between adjacent times does not change, it is determined that the first change condition satisfies the second temperature change condition, which indicates that the feeding cylinder is not filled with molten metal. If the first injection instruction is received at this time, it indicates that the second abnormality occurs in the injection preparation stage of the die casting machine.

[0087] In a feasible implementation, the second abnormality can be caused by a failure of the die casting machine or the quantitative furnace in the injection preparation stage, or caused by human error.

[0088] In step 206, in the case that the second abnormality occurs in the injection process of the die casting machine, the second injection instruction is sent to the die casting machine.

[0089] The second injection instruction is used to instruct the die casting machine to perform the second injection operation.

[0090] In the embodiment of the present application, the injection speed of the die casting machine in the injection action under the first injection operation is greater than the injection speed of the die casting machine in the injection action under the second injection operation. The first injection operation can be referred to as a fast injection operation, and the second injection operation can be referred to as a slow injection operation. In the case that the second abnormality occurs in the injection preparation stage of the die casting machine, the second injection instruction is sent to the die casting machine, so that the die casting machine can respond to the second injection instruction and perform the second injection operation. The injection monitoring device can be connected with the second transceiver of the die casting machine.

[0091] It should be noted that, by monitoring whether there is molten metal in the feeding cylinder through the infrared temperature sensor, and in the case that there is no molten metal in the feeding cylinder and the first injection instruction is received, the second injection instruction can be sent to the die casting machine by the injection monitoring device to control the die casting machine to perform the slow injection action, so as to avoid damage to the feeding cylinder and the mold, and thus the safety and stability of the die casting machine in the injection process are improved.

[0092] Of course, in the case that there is no molten metal in the feeding cylinder and the first injection instruction is received, a control instruction for controlling the die casting machine to be in a non-working state can also be sent to the die casting machine to control the die casting machine to be in a non-working state, so as to avoid the die casting machine hitting the mold at high speed and causing damage to the mold and the hammer head.

[0093] It should be noted that the descriptions of the same steps and contents in the embodiments of the present application and other embodiments can refer to the descriptions in other embodiments, which will not be described here.

[0094] The injection monitoring method provided by the embodiments of the present application can automatically determine whether an abnormality occurs in the die casting machine during the injection process by monitoring the first change of the temperature of the feeding cylinder on the die casting machine or the second change of the temperature of the hammer head on the die casting machine during the injection preparation stage, instead of determining whether an abnormality occurs in the die casting machine during the injection process according to the shape of the die casting part obtained after the die casting machine performs the injection action according to human experience, so as to improve the efficiency and accuracy of determining whether an abnormality occurs in the die casting machine during the injection process, and solve the problems of time lag, low efficiency and low accuracy of the scheme for detecting whether an abnormality occurs in the die casting machine during the injection process in the related art.

[0095] Based on the foregoing embodiments, the embodiments of the present application provide an injection monitoring method applied to an injection monitoring device, which refers to FIG. 1, and the method comprises the following steps: Figure 3

[0096] Step 301: Obtain the second temperature of the liquid at the hammer cooling liquid inlet and the third temperature of the liquid at the hammer cooling liquid outlet in the die casting machine.

[0097] In the embodiments of the present application, temperature sensors can be arranged at the hammer cooling liquid inlet and outlet in the die casting machine, so as to obtain the second temperature of the liquid at the hammer cooling liquid inlet and the third temperature of the liquid at the hammer cooling liquid outlet in real time or periodically through the temperature sensors.

[0098] ​It should be noted that the temperature of the hammer head of the die casting machine does not increase obviously in the normal injection action execution stage, and thus the difference between the temperature of the liquid at the hammer head cooling liquid inlet and the temperature of the liquid at the hammer head cooling liquid outlet is not large. If the die casting machine is stuck in the injection action execution stage, the surface temperature of the hammer head increases sharply due to the friction between the hammer head and the feeding cylinder, and thus the difference between the temperature of the liquid at the hammer head cooling liquid inlet and the temperature of the liquid at the hammer head cooling liquid outlet is obviously increased. Therefore, the second temperature of the liquid at the hammer head cooling liquid inlet and the third temperature of the liquid at the hammer head cooling liquid outlet can be obtained as the basis for judging the temperature change of the hammer head, so as to judge whether the die casting machine is stuck in the injection action execution stage.

[0099] In step 302, the second change condition is determined based on the second temperature and the third temperature.

[0100] In the embodiment of the present application, the second change condition can be obtained based on the difference between the first temperature of the liquid at the hammer head cooling liquid inlet and the second temperature of the liquid at the hammer head cooling liquid outlet. In this way, the second change condition of the temperature of the hammer head is determined by acquiring the difference between the cooling liquid temperatures at the hammer head cooling liquid inlet and outlet, so as to perform abnormal diagnosis according to the second change condition.

[0101] It should be noted that step 303 or steps 304-305 can be performed after step 302.

[0102] In step 303, if the second change condition meets a fourth temperature change condition, it is determined that the third abnormality occurs in the die casting machine in the injection process.

[0103] The fourth temperature change condition can be that the change range of the cooling liquid temperature at the hammer head cooling liquid inlet and outlet is in a third temperature change threshold range.

[0104] In the embodiment of the present application, in the injection action execution stage, if the temperature difference between the second temperature and the third temperature represented by the second change condition is in the third temperature change threshold range, it is determined that the second change condition meets the fourth temperature change condition. At this time, it is indicated that the difference between the cooling liquid temperatures at the hammer head cooling liquid inlet and outlet is large, and thus it can be determined that the die casting machine is stuck in the injection action execution stage. The third abnormality refers to the sticking of the hammer.

[0105] In step 304, the first oil pressure value of the hydraulic oil inlet of the die casting machine and the second oil pressure value of the hydraulic oil outlet of the die casting machine are obtained, and a third change condition between the first oil pressure value and the second oil pressure value is determined.

[0106] In the embodiment of the present application, the first oil pressure value of the hydraulic oil inlet and the second oil pressure value of the hydraulic oil outlet can be obtained by installing a hydraulic oil inlet pressure sensor in the hydraulic oil circuit of the die casting machine, and the third change condition can be obtained by calculating the difference between the first oil pressure value and the second oil pressure value.

[0107] In step 305, if the second change condition meets the fourth temperature change condition and the third change condition meets the oil pressure change condition, it is determined that the third abnormality occurs in the injection process of the die casting machine.

[0108] The oil pressure change condition can be that the oil pressure change range is within a target oil pressure change threshold range.

[0109] In the embodiment of the present application, in the injection action execution phase, if the second change condition meets the fourth temperature change condition and the third change condition represents that the oil pressure change range is within the target oil pressure change threshold range, it is determined that the die casting machine has a hammer sticking in the injection action execution phase. In this way, whether the hammer sticking occurs in the die casting machine in the injection action execution phase can be determined according to the change between the cooling liquid temperatures of the hammer head cooling liquid inlet and outlet and the change between the hydraulic oil pressures of the hydraulic oil inlet and outlet, thereby improving the accuracy of determining whether the hammer sticking occurs.

[0110] It should be noted that the same steps and the same content in the embodiments of the present application as in other embodiments can refer to the description in other embodiments, and will not be described here.

[0111] The injection monitoring method provided by the embodiments of the present application can automatically determine whether an abnormality occurs in the die casting machine in the injection process in the injection action execution phase by monitoring the second change condition of the cooling liquid temperature between the hammer head cooling liquid inlet and outlet, instead of determining whether an abnormality occurs in the die casting machine in the injection process according to the shape of the die casting part obtained by observing the die casting machine performing the injection action according to human experience in the related art. The efficiency and accuracy of detecting whether an abnormality occurs in the die casting machine in the injection process are improved, and the problem that the scheme for detecting whether an abnormality occurs in the die casting machine in the injection process in the related art has time lag, low efficiency, and low accuracy is solved.

[0112] Based on the foregoing embodiments, the embodiments of the present application provide an injection monitoring method applied to an injection monitoring device, which refers to Figure 4 as shown, and the method comprises the following steps:

[0113] In step 401, a first temperature of the feeding cylinder is detected by an infrared temperature sensor.

[0114] The distance between the infrared temperature sensor and the feeding cylinder meets a target distance threshold.

[0115] Step 402, determining a first change condition based on the first temperature.

[0116] Step 403, obtaining a second temperature of the liquid at the hammer head cooling liquid inlet and a third temperature of the liquid at the hammer head cooling liquid outlet.

[0117] Step 404, determining a second change condition based on the second temperature and the third temperature.

[0118] Step 405, determining that the die casting machine has a second abnormality in the injection process in a case that the first change condition meets a second temperature change condition, the second change condition meets a third temperature change condition, and a first injection instruction is received.

[0119] The first injection instruction is used to instruct the die casting machine to perform a first injection operation.

[0120] In the embodiment of the present application, the second temperature change condition is that the temperature change range of the material cylinder is in a second temperature change threshold range, and the third temperature change condition is that the cooling liquid temperature change range of the hammer head cooling liquid inlet and outlet is in a fourth temperature change threshold range; in the injection preparation stage, in a case that the temperature change range of the material cylinder represented by the first change condition is in the second temperature change threshold range, and the cooling liquid temperature change range of the hammer head cooling liquid inlet and outlet represented by the second change condition is in the fourth temperature change threshold range, it is indicated that the temperature of the material cylinder has no change or small change, and the temperatures of the liquids at the cooling liquid inlet and outlet are the same or have small difference, and thus if the first injection instruction is received, it is indicated that the die casting machine has a second abnormality in the injection preparation stage. In this way, the temperature change of the material cylinder and the temperature change between the liquids at the inlet and outlet of the hammer head cooling liquid are considered in the injection preparation stage to determine whether the die casting machine has a second abnormality in the injection preparation stage, and the accuracy of determining whether a second abnormality occurs is improved.

[0121] It should be noted that the same steps and the same content in the embodiments of the present application and other embodiments can refer to the description in other embodiments, and will not be described here.

[0122] The injection monitoring method provided by the embodiments of the present application can automatically determine whether the die casting machine has an abnormality in the injection preparation stage by monitoring the first change condition of the temperature of the material cylinder of the die casting machine and the second change condition between the monitored cooling liquid temperatures of the hammer head cooling liquid inlet and outlet, instead of observing the shape of the die casting part obtained after the die casting machine performs the injection action according to human experience to detect whether the die casting machine has an abnormality in the injection process, thereby improving the efficiency and accuracy of detecting whether the die casting machine has an abnormality in the injection process, and solving the problems of time lag, low efficiency, and low accuracy of the scheme for detecting whether the die casting machine has an abnormality in the injection process in the related art.

[0123] Based on the foregoing embodiments, the embodiments of the present application provide a shot monitoring method applied to a shot monitoring device, referring to FIG. 6, the method comprises the following steps: Figure 5

[0124] Step 501, detecting a first temperature of the charging barrel by an infrared temperature sensor.

[0125] Wherein, a distance between the infrared temperature sensor and the charging barrel satisfies a target distance threshold.

[0126] Step 502, determining a first change condition based on the first temperature.

[0127] Step 503, determining a corresponding relationship between a shot parameter of the die casting machine in a shot process, a reference temperature threshold of the liquid of the hammer head cooling liquid inlet and a reference temperature threshold of the liquid of the hammer head cooling liquid outlet.

[0128] In the embodiments of the present application, the historical shot parameter of the die casting machine in the historical shot process, the first historical temperature of the liquid of the hammer head cooling liquid inlet corresponding to the historical shot parameter and the second historical temperature of the liquid of the hammer head cooling liquid outlet can be obtained, and the corresponding relationship between the shot parameter, the reference temperature threshold of the liquid of the hammer head cooling liquid inlet and the reference temperature threshold of the liquid of the hammer head cooling liquid outlet is established based on the historical shot parameter, the first historical temperature and the second historical temperature. Wherein, the historical shot parameter can be a historical shot speed of the die casting machine in the historical shot process; wherein, the historical shot speed can be divided into a historical fast shot speed, a historical slow shot speed and a historical maximum empty shot speed.

[0129] Wherein, the historical fast shot speed can be an average speed of the shot punch in the historical fast shot process; the historical slow shot speed can be an average speed of the shot punch in the historical slow shot process; and the historical maximum empty shot speed can be a maximum fast shot speed in the historical empty shot condition.

[0130] ​Specifically, a plurality of first historical temperatures corresponding to historical fast injection speeds and a plurality of second historical temperatures corresponding to the historical fast injection speeds can be obtained, and then the plurality of first historical temperatures corresponding to the historical fast injection speeds are operated to obtain a reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to the fast injection speed, and the plurality of second historical temperatures corresponding to the historical fast injection speeds are operated to obtain a reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to the fast injection speed; a plurality of first historical temperatures corresponding to historical slow injection speeds and a plurality of second historical temperatures corresponding to the historical slow injection speeds can be obtained, and then the plurality of first historical temperatures corresponding to the historical slow injection speeds are operated to obtain a reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to the slow injection speed, and the plurality of second historical temperatures corresponding to the historical slow injection speeds are operated to obtain a reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to the slow injection speed; a plurality of first historical temperatures corresponding to historical maximum air injection speeds and a plurality of second historical temperatures corresponding to the historical maximum air injection speeds can be obtained, and then the plurality of first historical temperatures corresponding to the historical maximum air injection speeds are operated to obtain a reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to the maximum air injection speed, and the plurality of second historical temperatures corresponding to the historical maximum air injection speeds are operated to obtain a reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to the maximum air injection speed; in this way, the reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to different injection speeds and the reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to different injection speeds can be obtained, and a corresponding relationship is established based on this.

[0131] Step 504, obtaining a current injection parameter of the die casting machine in a current injection process.

[0132] In the embodiments of the present application, the current injection process of the die casting machine can be monitored to obtain the current injection parameter; wherein the current injection parameter includes the current injection speed.

[0133] Step 505, determining a first reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to the current injection parameter and a second reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to the current injection parameter based on the current injection parameter and the corresponding relationship.

[0134] In the embodiments of the present application, the target injection parameter matched with the current injection parameter can be determined from the corresponding relationship, and the reference temperature threshold of the liquid at the hammer head cooling liquid inlet corresponding to the target injection parameter is determined based on the corresponding relationship to obtain the first reference temperature threshold, and the reference temperature threshold of the liquid at the hammer head cooling liquid outlet corresponding to the target injection parameter is determined to obtain the second reference temperature threshold.

[0135] In a possible implementation, the current injection parameter is a current injection speed, when the current injection speed matches the fast injection speed in the correspondence relationship, the reference temperature threshold of the liquid of the hammer head cooling liquid inlet corresponding to the fast injection speed can be determined based on the correspondence relationship to obtain a first reference temperature threshold, and the reference temperature threshold of the liquid of the hammer head cooling liquid outlet corresponding to the fast injection speed can be determined based on the correspondence relationship to obtain a second reference temperature threshold.

[0136] In step 506, based on the second change condition, the first reference temperature threshold and the second reference temperature threshold, it is determined whether an abnormality occurs in the injection process of the die casting machine.

[0137] In the embodiment of the present application, in the execution phase of the injection action, a fifth temperature change condition can be determined based on the first reference temperature threshold and the second reference temperature threshold, so as to determine whether an abnormality occurs in the execution phase of the injection action of the die casting machine according to the fifth temperature change condition and the second change condition.

[0138] The fifth temperature change condition and the fourth temperature change condition can be the same or different.

[0139] In a possible implementation, the fifth temperature change condition is the fourth temperature change condition, and a third temperature change threshold range can be set based on the first reference temperature threshold and the second reference temperature threshold, and the fourth temperature change condition can be that the temperature change range of the cooling liquid of the hammer head cooling liquid inlet and outlet is in the third temperature change threshold range. In this way, the fourth temperature change condition can be determined in real time according to the current injection parameter of the die casting machine in the execution phase of the injection action and the correspondence relationship, that is, the fourth temperature change condition is dynamically determined and changes according to the injection speed. The fourth temperature change condition determined based on the change of the injection parameter in the injection process is considered, so as to determine whether the die casting machine has a third abnormality in the execution phase of the injection action based on the fourth temperature change condition and the second change condition.

[0140] In another possible implementation, the fifth temperature change condition is different from the fourth temperature change condition, and then in the execution phase of the injection action, it is determined whether the second change condition satisfies the fifth temperature change condition to obtain a determination result. When the determination result indicates that the second change condition satisfies the fifth temperature change condition, it is determined that an abnormality occurs in the execution phase of the injection action of the die casting machine. When the determination result indicates that the second change condition does not satisfy the fifth temperature change condition, it is determined that no abnormality occurs in the execution phase of the injection action of the die casting machine.

[0141] In this way, the injection parameters can be bound to the coolant temperature of the hammer head coolant inlet and outlet, so as to determine whether the die casting machine has an abnormality in the injection action execution stage based on the difference (change) between the coolant temperature of the hammer head coolant inlet and outlet determined in real time in the subsequent injection action execution stage and the reference coolant temperature threshold of the hammer head coolant inlet and outlet corresponding to the injection parameters, thereby improving the accuracy of determining whether the die casting machine has an abnormality in the injection action execution stage.

[0142] In other embodiments of the present application based on the foregoing embodiments, the injection monitoring method comprises the following steps:

[0143] Step 507: acquiring a first flow value of the liquid in the hammer head coolant inlet of the die casting machine and a second flow value of the liquid in the hammer head coolant outlet of the die casting machine.

[0144] In the embodiments of the present application, the first flow value of the liquid in the hammer head coolant inlet of the die casting machine and the second flow value of the liquid in the hammer head coolant outlet of the die casting machine can be acquired in real time or periodically by the flow meters arranged at the hammer head coolant inlet and outlet.

[0145] Step 508: determining a fourth change between the first flow value and the second flow value.

[0146] In the embodiments of the present application, the fourth change is determined based on the difference between the first flow value and the second flow value.

[0147] Step 509: determining that the die casting machine has a fourth abnormality in the injection process when the fourth change satisfies a flow change condition.

[0148] The flow change condition refers to that the flow change satisfies a target flow change threshold.

[0149] In the embodiments of the present application, when the flow change of the liquid in the hammer head coolant inlet and outlet represented by the fourth change satisfies the target flow change threshold in the injection preparation stage, it is determined that the die casting machine has a fourth abnormality in the injection preparation stage; when the flow change of the liquid in the hammer head coolant inlet and outlet represented by the fourth change satisfies the target flow change threshold in the injection action execution stage, it is determined that the die casting machine has a fourth abnormality in the injection action execution stage. The fourth abnormality refers to that the hammer head coolant pipeline has a water leakage. When it is detected that the die casting machine has the fourth abnormality, the die casting machine is controlled to be in a non-working state.

[0150] It should be noted that the same steps and the same content in the embodiments of the present application and other embodiments are described with reference to the descriptions in other embodiments, which will not be described here.

[0151] The injection monitoring method provided by the embodiments of the present application can monitor the second change condition between the cooling liquid temperatures of the hammer head cooling liquid inlet and outlet, the current injection parameter and the corresponding relationship in the injection action execution stage, and automatically determine whether the die casting machine has an abnormality in the injection process, instead of determining whether the die casting machine has an abnormality in the injection process according to the shape of the die casting part obtained after the die casting machine performs the injection action according to human experience, thereby improving the efficiency and accuracy of detecting whether the die casting machine has an abnormality in the injection process, and solving the problems of time lag, low efficiency and low accuracy of the scheme for detecting whether the die casting machine has an abnormality in the injection process in the related art.

[0152] Based on the foregoing embodiments, the embodiments of the present application provide an injection monitoring system, as shown in Figure 6 The method comprises the following steps:

[0153] The die casting machine 601 is used for injecting the metal liquid into the mold cavity of the mold through the hydraulic oil cylinder to obtain the die casting part.

[0154] The controller 602 is connected with the die casting machine 601, and is used for monitoring the first change condition of the temperature of the charging barrel on the die casting machine 601, monitoring the second change condition of the temperature of the hammer head on the die casting machine 601, and determining whether the die casting machine 601 has an abnormality in the injection process based on the first change condition and / or the second change condition.

[0155] The controller can be a micro control unit (MCU) with small volume, also known as a single chip microcomputer or a single chip microprocessor. Of course, the controller can also be a PLC controller.

[0156] The infrared temperature sensor is arranged within the target distance threshold range of the charging barrel, the first temperature of the charging barrel is collected in real time or periodically by the infrared temperature sensor, and the first change condition is determined based on the first temperatures of the charging barrel collected at adjacent two times.

[0157] In a feasible implementation manner, as shown in Figure 7 and as shown in Figure 8 The infrared temperature sensor is non-contact with the charging barrel, and is arranged at a position below the bottom horizontal plane of the charging barrel with a distance of 500mm-1000mm from the charging barrel.

[0158] The temperature sensors are arranged at the hammer head cooling liquid inlet and outlet of the die casting machine respectively, the second temperature of the liquid at the hammer head cooling liquid inlet and the third temperature of the liquid at the hammer head cooling liquid outlet are detected by the temperature sensors, and the second change condition is determined based on the second temperature and the third temperature.

[0159] In a possible implementation, the controller can determine whether the first abnormality or the second abnormality occurs in the injection process of the die casting machine according to the first change condition and a state of the die casting machine; wherein the first abnormality is determined to occur in the injection process of the die casting machine in a case where the first change condition satisfies a first temperature condition and the state of the die casting machine is a state where the first injection instruction is not received; and the second abnormality is determined to occur in the injection process of the die casting machine in a case where the first change condition satisfies a second temperature change condition and the state of the die casting machine is a state where the first injection instruction is received.

[0160] In another possible implementation, the third abnormality is determined to occur in the injection process of the die casting machine in a case where the second change condition satisfies a fourth temperature change condition; or, a first oil pressure value of the hydraulic oil inlet of the die casting machine and a second oil pressure value of the hydraulic oil outlet of the die casting machine are obtained, and a third change condition between the first oil pressure value and the second oil pressure value is determined. The third abnormality is determined to occur in the injection process of the die casting machine in a case where the second change condition satisfies the fourth temperature change condition and the third change condition satisfies an oil pressure change condition.

[0161] In another possible implementation, the second abnormality is determined to occur in the injection process of the die casting machine in a case where the first change condition satisfies the second temperature change condition, the second change condition satisfies a third temperature change condition, and the first injection instruction is received.

[0162] In another possible implementation, a corresponding relationship between the injection parameter, the reference temperature threshold of the liquid of the hammer head cooling liquid inlet, and the reference temperature threshold of the liquid of the hammer head cooling liquid outlet is determined, and whether the abnormality occurs in the injection process of the die casting machine is determined based on the obtained current injection parameter, the corresponding relationship, and the second change condition.

[0163] It should be noted that the same content in the embodiments of the present application as in other embodiments is described with reference to the description of other embodiments, and will not be described here.

[0164] The injection monitoring system provided by the embodiments of the present application, the die casting machine, is used for injecting metal liquid into a cavity of a mold through a hydraulic cylinder to obtain a die casting; the controller is connected with the die casting machine and is used for monitoring a first change condition of a temperature of a feeding cylinder on the die casting machine and monitoring a second change condition of a temperature of a hammer head on the die casting machine; based on the first change condition and / or the second change condition, it is determined whether an abnormality occurs in the die casting machine during the injection process; in this way, the controller can automatically determine whether an abnormality occurs in the die casting machine during the injection process by monitoring the first change condition of the temperature of the feeding cylinder on the die casting machine and / or the second change condition of the temperature of the hammer head on the die casting machine, instead of determining whether an abnormality occurs in the die casting machine during the injection process according to the shape of the die casting obtained after the die casting machine performs the injection action according to human experience, so that the efficiency and the accuracy of determining whether an abnormality occurs in the die casting machine during the injection process are improved, and the problem that the scheme for detecting whether an abnormality occurs in the die casting machine during the injection process in the related art has time lag, low efficiency, and low accuracy is solved.

[0165] Based on the foregoing embodiments, the embodiments of the present application provide a computer-readable storage medium storing one or more programs, which can be executed by one or more processors to implement Figures 1 to 5 The steps of the injection monitoring method provided by the corresponding embodiments.

[0166] It should be noted that the computer-readable storage medium described above can be a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Ferromagnetic Random Access Memory (FRAM), a Flash Memory, a magnetic surface memory, an optical disc, or a Compact Disc Read-Only Memory (CD-ROM) memory, etc. The computer-readable storage medium can also be various electronic devices including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0167] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "comprises" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0168] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent advantages or disadvantages of the embodiments.

[0169] Those skilled in the art can clearly understand the above-mentioned embodiment method by means of software and necessary general hardware platform, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device) to execute the methods described in various embodiments of the present application.

[0170] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0171] These computer program instructions can also be stored in a computer-readable storage medium that can guide the computer or other programmable data processing devices to work in a specific manner, so that the instructions stored in the computer-readable storage medium produce a manufactured product including instruction devices that implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0172] These computer program instructions can also be loaded into a computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable data processing devices to generate a computer-implemented process, so that the instructions executed on the computer or other programmable data processing devices provide a process for implementing the functions specified in the flowchart Figure 1 one flow or multiple flows and / or the functions specified in the block Figure 1 one flow or multiple flows and / or the functions specified in the block

[0173] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for monitoring injection pressure, characterized in that, The method includes: Monitor the first change in temperature of the feed cylinder on the die-casting machine; The second temperature of the liquid at the inlet of the hammer coolant and the third temperature of the liquid at the outlet of the hammer coolant in the die casting machine are obtained. Based on the second temperature and the third temperature, a second temperature change of the hammer head on the die-casting machine is determined; If the first change condition satisfies the second temperature change condition, and the second change condition satisfies the third temperature change condition, and the die-casting machine receives the first injection command, it is determined that the die-casting machine has experienced a second abnormality during the injection process; wherein, the first injection command is used to instruct the die-casting machine to perform a first injection operation, the second temperature change condition is that the temperature change range of the feed cylinder is within the second temperature change threshold range or the temperature does not change, the third temperature change condition is that the temperature change range of the coolant at the inlet and outlet of the hammer head is within the fourth temperature change threshold range, and the second abnormality is an abnormality caused by a malfunction of the feeder or the metering furnace during the injection preparation stage or an abnormality caused by human error.

2. The method according to claim 1, characterized in that, The first change in the temperature of the feed cylinder on the die-casting machine is monitored, including: The first temperature of the feed cylinder is detected by an infrared temperature sensor; wherein the distance between the infrared temperature sensor and the feed cylinder meets a target distance threshold. Based on the first temperature, the first change is determined.

3. The method according to claim 1 or 2, characterized in that, The method further includes: In the event that the second abnormality occurs during the injection process, the die casting machine sends a second injection command to the die casting machine; wherein the second injection command is used to instruct the die casting machine to perform a second injection operation; wherein the first injection operation and the second injection operation are different.

4. The method according to claim 1 or 2, characterized in that, The method further includes: Obtain the first flow rate value of the liquid at the inlet of the hammer coolant in the die casting machine and the second flow rate value of the liquid at the outlet of the hammer coolant in the die casting machine; Determine a fourth change between the first flow rate value and the second flow rate value; If the fourth change condition satisfies the flow rate change condition, it is determined that the die-casting machine has experienced a fourth anomaly during the injection process. The flow rate change condition is that the flow rate change meets the target flow rate change threshold, and the fourth anomaly is that the coolant pipe of the hammer head leaks.

5. A method for monitoring injection pressure, characterized in that, The method includes: Monitor the first change in temperature of the feed cylinder on the die-casting machine; If the first change condition satisfies the first temperature change condition and the die casting machine does not receive the first injection command, it is determined that the die casting machine has encountered a first abnormality during the injection process. The first abnormality is that the feeder or the metering furnace malfunctions during the injection preparation stage or the first transceiver on the die casting machine used to receive the feeder or the metering furnace malfunctions. The first injection command is used to instruct the die casting machine to perform the first injection operation, and the first temperature change condition is that the temperature change range is within the first temperature change threshold range. The second change in the temperature of the hammerhead on the die-casting machine was monitored. Determine the correspondence between the injection parameters of the die casting machine during the injection process, the reference temperature threshold of the liquid at the inlet of the hammer coolant in the die casting machine, and the reference temperature threshold of the liquid at the outlet of the hammer coolant; Obtain the current injection parameters of the die-casting machine during the current injection process; Based on the current injection parameters and the corresponding relationship, a first reference temperature threshold for the liquid at the inlet of the hammerhead coolant corresponding to the current injection parameters and a second reference temperature threshold for the liquid at the outlet of the hammerhead coolant corresponding to the current injection parameters are determined. Based on the second change, the first reference temperature threshold, and the second reference temperature threshold, it is determined whether the die-casting machine has experienced an abnormality during the injection process.

6. A pressure injection monitoring system, characterized in that, The system includes: A die casting machine is used to inject metal into the mold cavity via a hydraulic cylinder to obtain die castings. A controller, connected to the die-casting machine, is used to monitor the first temperature change of the feed cylinder on the die-casting machine; and to obtain the second temperature of the liquid at the inlet of the hammer coolant and the third temperature of the liquid at the outlet of the hammer coolant in the die-casting machine. Based on the second temperature and the third temperature, a second temperature change of the hammer head on the die-casting machine is determined; If the first change condition satisfies the second temperature change condition, and the second change condition satisfies the third temperature change condition, and the die-casting machine receives the first injection command, it is determined that the die-casting machine has experienced a second abnormality during the injection process; wherein, the first injection command is used to instruct the die-casting machine to perform a first injection operation, the second temperature change condition is that the temperature change range of the feed cylinder is within the second temperature change threshold range or the temperature does not change, the third temperature change condition is that the temperature change range of the coolant at the inlet and outlet of the hammer head is within the fourth temperature change threshold range, and the second abnormality is an abnormality caused by a malfunction of the feeder or the metering furnace during the injection preparation stage or an abnormality caused by human error.

7. A pressure injection monitoring system, characterized in that, The system includes: A die casting machine is used to inject metal into the mold cavity via a hydraulic cylinder to obtain die castings. A controller, connected to the die-casting machine, is used for: Monitor the first change in temperature of the feed cylinder on the die-casting machine; If the first change condition satisfies the first temperature change condition and the die casting machine does not receive the first injection command, it is determined that the die casting machine has encountered a first abnormality during the injection process. The first abnormality is that the feeder or the metering furnace malfunctions during the injection preparation stage or the first transceiver on the die casting machine used to receive the feeder or the metering furnace malfunctions. The first injection command is used to instruct the die casting machine to perform the first injection operation, and the first temperature change condition is that the temperature change range is within the first temperature change threshold range. The second change in the temperature of the hammerhead on the die-casting machine was monitored. Determine the correspondence between the injection parameters of the die casting machine during the injection process, the reference temperature threshold of the liquid at the inlet of the hammer coolant in the die casting machine, and the reference temperature threshold of the liquid at the outlet of the hammer coolant; Obtain the current injection parameters of the die-casting machine during the current injection process; Based on the current injection parameters and the corresponding relationship, a first reference temperature threshold for the liquid at the inlet of the hammerhead coolant corresponding to the current injection parameters and a second reference temperature threshold for the liquid at the outlet of the hammerhead coolant corresponding to the current injection parameters are determined. Based on the second change, the first reference temperature threshold, and the second reference temperature threshold, it is determined whether the die-casting machine has experienced an abnormality during the injection process.

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