Fault judgment method, device and equipment of hydraulic injection molding machine and storage medium

Abstract

The application discloses a hydraulic injection molding machine fault judgment method, device, equipment and storage medium, belongs to the injection molding technical field, and the method comprises the steps that a screw rotation speed standard range G1 is matched with a motor rotation speed standard range M1; a glue injection speed standard range s2 is matched with a motor rotation speed standard range m2; if it is judged that the current screw rotation speed is less than the preset screw rotation speed standard range G1, and the current glue melting pressure is less than the preset glue melting pressure standard range P1, whether the current motor rotation speed is in the preset motor rotation speed standard range M1 is judged; if the current motor rotation speed is in the motor rotation speed standard range M1, a glue melting motor fault is prompted; if the current motor rotation speed is out of the motor rotation speed standard range M1, whether the motor rotation speed during glue injection of the injection molding machine is in the preset motor rotation speed standard range m2 is judged, and fault information is prompted. In the application, the hydraulic injection molding machine fault is found in time, and the injection molding machine is prevented from being damaged.

Description

Technical Field

[0001] This application relates to the field of injection molding technology, and in particular to a fault diagnosis method, device, equipment and storage medium for a hydraulic injection molding machine. Background Technology

[0002] Currently, hydraulic plastic injection molding machines (hereinafter referred to as hydraulic injection molding machines) are equipment that relies on compression molding. Generally, hydraulic injection molding machines use an oil pump as the power source (both injection and melting use an oil pump as the power source), an oil motor as the drive mechanism for rotating the melting screw, and an injection cylinder as the injection drive. During the production process, the oil pump, oil motor, and injection cylinder, which are the core of the injection molding machine's hydraulic system, usually operate in a state of high torque, high pressure, continuous high-speed reciprocating motion. Prolonged continuous operation will cause changes in the physical properties of the main mechanical structural components of the oil pump and oil motor, as well as the piston components of the cylinder, such as overheating, wear, or internal leakage, thus affecting the stability of the machine. In severe cases, iron filings generated by wear can enter the machine's hydraulic lines, damaging the machine's hydraulic system, making the machine unable to work properly, and leading to machine damage.

[0003] In the existing technology, the fault condition is only checked manually when the hydraulic injection molding machine stops running. At this time, the hydraulic injection molding machine can no longer work normally. That is to say, in the existing technology, the fault of the hydraulic injection molding machine is not detected in time, which makes the machine easy to be damaged.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a fault diagnosis method for hydraulic injection molding machines, aiming to solve the problem in the prior art that faults in hydraulic injection molding machines are not detected in a timely manner, leading to easy damage to the machine.

[0006] To achieve the above objectives, this application provides a fault diagnosis method for a hydraulic injection molding machine. The hydraulic injection molding machine uses an oil pump to drive both the melting motor and the injection cylinder to move the screw. The oil pump is driven by an electric motor. During the melting process in the injection molding machine...

[0007] Match the screw speed standard range G1 with the motor speed standard range M1; match the injection speed standard range s2 with the motor speed standard range m2;

[0008] If it is determined that the current screw speed is less than the preset screw speed standard range G1 and the current melt pressure is less than the preset melt pressure standard range P1, then determine whether the current motor speed is within the preset motor speed standard range M1.

[0009] If the current motor speed is within the standard range M1, a melt motor fault is indicated; if the current motor speed is outside the standard range M1, a fault message is indicated based on whether the motor speed during injection molding is within the preset standard range m2.

[0010] In one possible implementation of this application, the fault information is indicated based on whether the motor speed during injection molding is within a preset standard range of motor speed m2.

[0011] If the motor speed during injection molding is within the preset standard range of motor speed (m2), a melt motor malfunction is indicated.

[0012] If the motor speed during injection molding is outside the preset standard range of motor speed (m2), it indicates a fault in the oil pump drive system.

[0013] In one possible implementation of this application, when the current melt pressure is greater than or equal to the preset melt pressure standard range P1, a fault message indicating that the melt pressure setting value is too low is displayed.

[0014] In one possible embodiment of this application, the fault diagnosis method for the hydraulic injection molding machine further includes: during the injection molding machine's injection process,

[0015] If it is determined that the current injection speed is less than the preset injection speed standard range s2 and the current injection pressure is less than the preset injection pressure standard range p2, then determine whether the current motor speed is within the preset motor speed standard range m2.

[0016] If the current motor speed is within the standard range m2, a fault is indicated in the injection cylinder; if the current motor speed is outside the standard range m2, a fault message is indicated based on whether the motor speed during injection molding is within the preset standard range M1.

[0017] In one possible implementation of this application, the fault message prompting based on whether the motor speed during injection molding is within a preset motor speed standard range M1 includes:

[0018] If the motor speed of the injection molding machine is within the preset standard range M1 when the glue is melting, it indicates a problem with the injection cylinder.

[0019] If the motor speed of the injection molding machine during melting is outside the preset standard range M1, a fault in the oil pump drive system will be indicated.

[0020] In one possible implementation of this application, when the current injection pressure is greater than or equal to the preset injection pressure standard range p2, a fault message indicating that the injection pressure setting value is too low is displayed.

[0021] In one possible implementation of this application, when a fault is indicated, the injection molding machine is controlled to stop after the injection cycle ends and the current automatic mode is switched to manual mode.

[0022] Furthermore, to achieve the above objectives, this application also provides a fault diagnosis device for a hydraulic injection molding machine. The hydraulic injection molding machine uses an oil pump to drive both the melt motor-driven screw rotation and the injection cylinder-driven screw movement. The oil pump is driven by an electric motor. The fault diagnosis device for the hydraulic injection molding machine includes:

[0023] The matching module is used to match the standard range of screw speed G1 with the standard range of motor speed M1 during the melting process of the injection molding machine; and to match the standard range of injection speed s2 with the standard range of motor speed m2.

[0024] The first judgment module is used to determine whether the current motor speed is within the preset motor speed standard range M1 if the current screw speed is less than the preset screw speed standard range G1 and the current melt pressure is less than the preset melt pressure standard range P1.

[0025] The prompting module is used to prompt a melt motor malfunction if the current motor speed is within the standard range M1 of the motor speed; and to prompt a fault message based on whether the motor speed during injection molding is within the preset standard range m2 of the motor speed if the current motor speed is outside the standard range M1 of the motor speed.

[0026] In addition, to achieve the above objectives, this application also provides a fault diagnosis device for a hydraulic injection molding machine. The fault diagnosis device for the hydraulic injection molding machine is a physical node device. The fault diagnosis device for the hydraulic injection molding machine includes: a memory, a processor, and a fault diagnosis program for the hydraulic injection molding machine stored in the memory and executable on the processor. The processor executes the fault diagnosis program for the hydraulic injection molding machine to implement the steps of the fault diagnosis method for the hydraulic injection molding machine.

[0027] In addition, to achieve the above objectives, this application also provides a storage medium storing a program for implementing a fault diagnosis method for a hydraulic injection molding machine. When the fault diagnosis program for the hydraulic injection molding machine is executed by a processor, it implements the steps of the fault diagnosis method for the hydraulic injection molding machine described above.

[0028] This application provides a fault diagnosis method, device, equipment, and storage medium for a hydraulic injection molding machine. Compared with the prior art, where faults in hydraulic injection molding machines are not detected in a timely manner, leading to easy machine damage, it is understandable that in this application, when the current melt pressure is less than the preset melt pressure standard range P1, it is obvious that the melt pressure setting is not problematic. At this time, if it is determined that the current screw speed is less than the preset screw speed standard range G1, and if the current motor speed is within the motor speed standard range M1, it is obvious that the motor speed (motor) is not problematic. At this time, a melt motor fault is indicated. If the current motor speed is outside the motor speed standard range M1... If there is a problem with the motor speed, the system will determine whether the motor speed during injection molding is within the preset standard range m2 (obviously, the motor speed during injection molding is used to determine whether the problem is caused by a motor malfunction or other reasons such as a malfunction in the oil pump drive system). Corresponding fault information will then be displayed. In this application, real-time monitoring of this data allows for calculation and logical judgment to determine whether each component, such as the motor and melt motor, is within its normal operating range. In this embodiment, various faults in the hydraulic injection molding machine can be identified promptly, thus preventing prolonged lack of maintenance and potential damage to the hydraulic injection molding machine. Attached Figure Description

[0029] Figure 1 This is a flowchart illustrating the first embodiment of the fault diagnosis method for hydraulic injection molding machines according to this application;

[0030] Figure 2 This is a flowchart illustrating the second embodiment of the fault diagnosis method for hydraulic injection molding machines according to this application;

[0031] Figure 3 This is a flowchart illustrating the third embodiment of the fault diagnosis method for hydraulic injection molding machines according to this application;

[0032] Figure 4 This is a schematic diagram of the fault diagnosis device for the hydraulic injection molding machine of this application;

[0033] Figure 5 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the embodiment of the fault diagnosis method for hydraulic injection molding machine of this application;

[0034] Figure 6 This is a schematic diagram showing the connection relationship of various components of the hydraulic injection molding machine in the embodiment of the fault diagnosis method for the hydraulic injection molding machine of this application;

[0035] Figure 7 This is a schematic diagram of the overall process involved in the embodiment of the fault diagnosis method for hydraulic injection molding machines in this application. Detailed Implementation

[0036] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0037] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0038] It should be understood that although the terms first, second, third, etc., may be used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, may be interpreted as "when," "when," or "in response to determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising," "including," indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used in this application, may be interpreted as inclusive, or mean any one or any combination thereof. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Similarly, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0039] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0040] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0041] It should be noted that step designations such as S10 and S20 are used in this document for the purpose of more clearly and concisely describing the corresponding content, and do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute S20 first and then S10, etc., but these should all be within the protection scope of this application.

[0042] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0043] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0044] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] This application provides a fault diagnosis method for a hydraulic injection molding machine. In the first embodiment of this fault diagnosis method, the hydraulic injection molding machine uses an oil pump to drive the screw rotation via a melt motor and the screw movement via an injection cylinder. The oil pump is driven by a motor. (Refer to...) Figure 1 The method includes:

[0047] Step S10: When the injection molding machine is melting the glue, match the screw speed standard range G1 with the motor speed standard range M1; match the injection speed standard range s2 with the motor speed standard range m2;

[0048] In this embodiment, the entity executing the fault diagnosis method for the hydraulic injection molding machine is the fault diagnosis device for the hydraulic injection molding machine, which belongs to the category of hydraulic injection molding machines.

[0049] It is understandable that a hydraulic injection molding machine contains many hydraulic components, among which the core hydraulic components include the motor, oil pump, hydraulic cylinder, and injection cylinder. The oil pump drives the screw rotation via the melt motor and the screw movement via the injection cylinder. The oil pump is driven by the motor. Specifically, as shown... Figure 6 As shown.

[0050] It is understood that in this embodiment, the oil pump provides power for the melting stage (oil circuit) and the injection stage (oil circuit). Specifically, the oil motor serves as the driving mechanism for the rotation of the melting screw, and the injection cylinder serves as the injection drive.

[0051] In this embodiment, during the melting and injection processes, such as Figure 6 As shown, all use the same motor, which is the driving source for the oil pump.

[0052] In this embodiment, the screw is the connecting rod between the aforementioned core hydraulic components, and plays the role of power transmission. During the melting stage, the motor drives the screw to rotate, and during the injection stage, the hydraulic cylinder drives the screw to move.

[0053] In this embodiment, during the process of melting or injecting plastic workpieces into the injection molding machine, fault diagnosis can be performed in real time, rather than requiring the melting or injection to be stopped.

[0054] It is understandable that the plastic workpieces to be processed vary in model and shape.

[0055] In this embodiment, the plastic workpiece is formed by injection through a plastic workpiece gate. As an example, if the hydraulic injection molding machine can process a horn-shaped plastic workpiece, then the plastic workpiece gate is a horn-shaped gate. As another example, the shape of the plastic workpiece gate can be various, such as fan-shaped or semi-circular. No specific limitation is made.

[0056] In this embodiment, the raw material for plastic processing, such as solid plastic material, is first heated to melt it into a liquid state (molten plastic). Then, the liquid plastic is pressurized to propel it forward. As the liquid plastic flows, the injection molding process is nearing completion. Finally, the liquid plastic flows into the cavity corresponding to the workpiece. The cavity is essentially a physical model of the plastic workpiece, and different plastic workpieces have corresponding cavities.

[0057] In this embodiment, different types of plastic components have different effects on the hardness of plastic workpieces, and the content of different plastic components also has different effects on the hardness of plastic workpieces.

[0058] In this embodiment, the stronger the hardening performance of the plastic component that increases hardness, or the higher the content of the plastic component that increases hardness, the more significant the hardening effect on the plastic workpiece.

[0059] In this embodiment, after the fluid plastic is successfully injected into the mold cavity, it needs to solidify since it is currently in a fluid state. This can be done by waiting for it to cool down or by using a cooling device to cool the high-temperature plastic. Once the temperature has decreased and the plastic has solidified, it is demolded from the mold cavity to obtain the plastic workpiece.

[0060] When melting glue in a hydraulic injection molding machine, the standard range of the corresponding motor speed is set as M1, and the standard range of the corresponding screw speed is set as G1. However, due to various reasons (due to malfunction or other reasons, etc.), the set motor speed M1 and the actual motor speed may be different, and the actual screw speed may not be within the standard range of screw speed.

[0061] Similarly, hydraulic injection molding machines can also obtain the standard range of injection speed s2 and the standard range of motor speed m2. That is, the standard range of motor speed is set to m2 and the standard range of injection speed is set to s2. However, due to various reasons such as malfunctions, the set motor speed m2 and the actual motor speed may be different, and the corresponding injection speed may not be within the standard range s2.

[0062] Therefore, in this embodiment, the screw speed standard range G1 is matched with the motor speed standard range M1; the injection speed standard range s2 is matched with the motor speed standard range m2.

[0063] It is understandable that, under normal circumstances or without any malfunctions, when the standard range of motor speed is M1, the corresponding standard range of screw speed is G1; when the standard range of motor speed is m2, the corresponding standard range of injection speed is s2. This has been verified or obtained by the debugging personnel through actual measurement.

[0064] It is understandable that the standard range of motor speed M1 can be from 0.95V1 to 1.05V1, where V1 is the rated speed of the motor when the glue is melted.

[0065] It is understandable that the standard range of screw speed is G1, which can be 0-0.95n1, where n1 is the rated speed of the screw when melting the adhesive.

[0066] Step S20: If it is determined that the current screw speed is less than the preset screw speed standard range G1 and the current melt pressure is less than the preset melt pressure standard range P1, then determine whether the current motor speed is within the preset motor speed standard range M1.

[0067] It is understood that in this application, when the current melt pressure is greater than or equal to the preset melt pressure standard range P1, a fault message indicating that the melt pressure setting value is too low is displayed. At this time, it is necessary to reset the melt pressure. For example, the melt pressure value can be set to be greater than P1 to meet the pressure requirements during the melting process, and then subsequent judgments can be made.

[0068] Understandable, such as Figure 7 As shown, when the current melt pressure is less than the preset melt pressure standard range P1 (for example, when the melted plastic raw material has good fluidity), the melt pressure meets the requirements. However, if it is determined that the current screw speed is less than the preset screw speed standard range G1, it may be a melt motor failure or an oil pump drive system failure (an oil pump drive system failure causes a problem with the motor speed, which in turn causes a problem with the screw speed). In this case, it is necessary to further determine whether the current motor speed is within the preset motor speed standard range M1, and then finally determine which component is malfunctioning.

[0069] Step S30: If the current motor speed is within the standard range M1 of the motor speed, a fault is indicated for the melt motor; if the current motor speed is outside the standard range M1 of the motor speed, a fault message is indicated based on whether the motor speed during injection molding is within the preset standard range m2 of the motor speed.

[0070] It is understandable that if the current motor speed is within the standard range M1 of the motor speed, it obviously indicates a fault in the melt glue motor. That is, the motor speed is not the problem. At this time, the oil pump drive system of the drive motor is not the problem. Only the fault in the melt glue motor will cause the screw speed to be abnormal.

[0071] It is understandable that if the current motor speed is outside the standard range M1 of the motor speed, then there is obviously a problem with the motor speed. At this time, a fault message will be displayed. Of course, it is possible to further determine which component is malfunctioning.

[0072] That is, the fault information provided based on whether the motor speed during injection molding is within the preset standard range of motor speed m2 includes:

[0073] If the motor speed during injection molding is within the preset standard range of motor speed (m2), a melt motor malfunction is indicated.

[0074] If the motor speed during injection molding is outside the preset standard range of motor speed (m2), it indicates a fault in the oil pump drive system.

[0075] It is understandable that if the motor speed during injection molding is within the preset standard range of motor speed m2, the motor is obviously working normally in the injection scenario (the motor speed is normal in the injection scenario). In this case, only a failure of the melt motor will cause the screw speed to be abnormal.

[0076] Understandable, such as Figure 7 As shown, if the motor speed during injection molding is outside the preset standard range of motor speed m2, that is, the same problem occurs in both injection and melting scenarios, namely abnormal motor speed. Obviously, the abnormal motor speed is caused by a fault in the oil pump drive system (servo drive system).

[0077] As an example, once it is determined that the melt motor is faulty, it needs to be replaced manually after the injection molding machine is stopped.

[0078] In this embodiment, after the oil pump drive system fails, it needs to be replaced manually after the injection molding machine is stopped.

[0079] This application provides a fault diagnosis method, device, equipment, and storage medium for a hydraulic injection molding machine. Compared with the prior art, where faults in hydraulic injection molding machines are not detected in a timely manner, leading to easy machine damage, it is understandable that in this application, when the current melt pressure is less than the preset melt pressure standard range P1, it is obvious that the melt pressure setting is not problematic. At this time, if it is determined that the current screw speed is less than the preset screw speed standard range G1, and if the current motor speed is within the motor speed standard range M1, it is obvious that the motor speed (motor) is not problematic. At this time, a melt motor fault is indicated. If the current motor speed is outside the motor speed standard range M1... If there is a problem with the motor speed, the system will determine whether the motor speed during injection molding is within the preset standard range m2 (obviously, the motor speed during injection molding is used to determine whether the problem is caused by a motor malfunction or other reasons such as a malfunction in the oil pump drive system). Corresponding fault information will then be displayed. In this application, real-time monitoring of this data allows for calculation and logical judgment to determine whether each component, such as the motor and melt motor, is within its normal operating range. In this embodiment, various faults in the hydraulic injection molding machine can be identified promptly, thus preventing prolonged lack of maintenance and potential damage to the hydraulic injection molding machine.

[0080] Example 2

[0081] Furthermore, based on Embodiment 1 of this application, another embodiment of this application is provided, in which reference is made to... Figure 2 The fault diagnosis method for the hydraulic injection molding machine further includes:

[0082] Step S40: When the injection molding machine is injecting glue, if it is determined that the current injection speed is less than the preset injection speed standard range s2 and the current injection pressure is less than the preset injection pressure standard range p2, then it is determined whether the current motor speed is within the preset motor speed standard range m2.

[0083] When a hydraulic injection molding machine is injecting material, the standard range of the corresponding motor speed is set to m2, and the standard range of the corresponding injection speed is s2. However, due to various reasons such as malfunctions, the set motor speed m2 and the actual motor speed may be different, and the corresponding injection speed may not be within the standard range s2.

[0084] Therefore, in this embodiment, when the injection molding machine is injecting the material, the current injection speed is matched with the preset injection speed standard range s2.

[0085] It is understandable that under normal circumstances, or when no fault occurs, when the standard range of motor speed is m2, the corresponding standard range of melt speed is s2. This has been verified or obtained by the debugging personnel through actual measurement.

[0086] It is understandable that the standard range of motor speed m2 can be from 0.95V2 to 1.05V2, where V2 is the rated speed of the motor during injection.

[0087] Understandable, such as Figure 7 As shown in this application, when the current injection pressure is greater than or equal to the preset injection pressure standard range p2, a fault message indicating that the injection pressure setting value is too low is displayed. At this time, the injection pressure needs to be reset. For example, the injection pressure value can be set to be greater than p2 to meet the pressure requirements during the injection process, and then subsequent judgments can be made.

[0088] It is understandable that when the current injection pressure is less than the preset injection pressure standard range p2, the injection pressure meets the requirements. However, if the current injection speed is less than the preset injection speed standard range s2, it may be due to a fault in the injection cylinder or a fault in the oil pump drive system (a fault in the oil pump drive system causes problems with the motor speed), etc., which requires further investigation.

[0089] Step S50: If the current motor speed is within the standard range m2 of the motor speed, a fault is indicated in the injection cylinder; if the current motor speed is outside the standard range m2 of the motor speed, a fault message is indicated based on whether the motor speed during the injection molding machine's melting process is within the preset standard range M1 of the motor speed.

[0090] Understandable, such as Figure 7 As shown, if the current motor speed is within the standard range of the motor speed m2, it is obvious that the injection cylinder is faulty. That is, the motor speed is not the problem. At this time, the oil pump drive system of the drive motor is not the problem. Only the injection cylinder fault will cause the screw speed to be abnormal.

[0091] It is understandable that if the current motor speed is outside the standard range of the motor speed m2, then there is obviously a problem with the motor speed. In this case, a fault message will be displayed. Of course, it is possible to further determine which component is malfunctioning.

[0092] That is, the fault information provided based on whether the motor speed during injection molding is within the preset standard range M1 includes:

[0093] If the motor speed of the injection molding machine is within the preset standard range M1 when the glue is melting, it indicates a problem with the injection cylinder.

[0094] If the motor speed of the injection molding machine during melting is outside the preset standard range M1, a fault in the oil pump drive system will be indicated.

[0095] It is understandable that if the motor speed of the injection molding machine during melting is within the preset standard range M1, the motor is obviously working normally in the melting scenario (the motor speed is normal in the melting scenario). At this time, only a malfunction of the injection cylinder will cause the corresponding abnormal situation (the current motor speed during injection is outside the standard range m2, while the motor speed during melting is within the preset standard range M1).

[0096] It is understandable that if the motor speed of the injection molding machine is outside the preset standard range M1 when melting the glue, it indicates a fault in the oil pump drive system. That is, the same problem occurs in both the melting and injection scenarios, namely abnormal motor speed. Obviously, the abnormal motor speed is caused by a fault in the oil pump drive system (servo drive system).

[0097] As an example, once a malfunction is identified in the injection cylinder, it needs to be replaced manually after the injection molding machine is stopped.

[0098] In this embodiment, after the oil pump drive system fails, it needs to be replaced manually after the injection molding machine is stopped.

[0099] This application provides a fault diagnosis method, device, equipment, and storage medium for a hydraulic injection molding machine. Compared with the prior art, where injection faults in hydraulic injection molding machines are not detected in a timely manner, leading to easy machine damage, this application addresses the issue that if the current injection speed is less than a preset injection speed standard range s2 and the current injection pressure is less than a preset injection pressure standard range p2, it determines whether the current motor speed is within a preset motor speed standard range m2. If the current motor speed is within the motor speed standard range m2, a fault in the injection cylinder is indicated. If the current motor speed is outside the motor speed standard range m2, a fault message is indicated based on whether the motor speed during injection molding is within a preset motor speed standard range M1. In other words, in this application, real-time monitoring of this corresponding data allows for calculation and logical judgment to determine whether each component, such as the motor and injection cylinder, is within its normal operating range. Thus, in this embodiment, various faults in the hydraulic injection molding machine can be identified in a timely manner, thereby preventing damage to the hydraulic injection molding machine due to prolonged lack of maintenance for corresponding faults.

[0100] Example 3

[0101] Furthermore, based on Embodiments 1 and 2 of this application, another embodiment of this application is provided, in which reference is made to... Figure 3 It also includes:

[0102] Step S60: When a fault is indicated, control the injection molding machine to stop after the injection cycle ends and switch the current automatic mode to manual mode.

[0103] In this embodiment, when a fault is indicated, the injection molding machine is controlled to stop after the injection cycle ends and the current automatic mode is switched to manual mode. Specifically, if the current stage is the melting stage, the injection molding machine is controlled to stop after the injection cycle ends and the current automatic melting mode is switched to manual melting mode. Specifically, if the current stage is the injection stage, the injection molding machine is controlled to stop after the injection cycle ends and the current automatic injection mode is switched to manual injection mode.

[0104] It is understood that in this embodiment, when a fault is indicated, the injection molding machine is stopped after the injection cycle ends and the current automatic mode is switched to manual mode. Therefore, the fault can be eliminated or cleared in a timely manner in manual mode, so as to avoid affecting the stability of the machine or causing damage to the machine.

[0105] Example 4

[0106] Furthermore, based on all the above embodiments, another embodiment of this application is provided, in which, as... Figure 4 This application provides a fault diagnosis device for a hydraulic injection molding machine. The hydraulic injection molding machine uses an oil pump to drive both a melt motor-driven screw rotation and an injection cylinder-driven screw movement. The oil pump is driven by an electric motor. The fault diagnosis device for the hydraulic injection molding machine includes:

[0107] The matching module is used to match the standard range of screw speed G1 with the standard range of motor speed M1 during the melting process of the injection molding machine; and to match the standard range of injection speed s2 with the standard range of motor speed m2.

[0108] The first judgment module is used to determine whether the current motor speed is within the preset motor speed standard range M1 if the current screw speed is less than the preset screw speed standard range G1 and the current melt pressure is less than the preset melt pressure standard range P1.

[0109] The first prompting module is used to prompt a melt motor malfunction if the current motor speed is within the standard range M1 of the motor speed; and to prompt a fault message based on whether the motor speed during injection molding is within the preset standard range m2 if the current motor speed is outside the standard range M1 of the motor speed.

[0110] In one possible implementation of this application, the prompting module includes:

[0111] The first prompting unit is used to indicate a malfunction of the melt motor if the motor speed during injection molding is within the preset standard range of motor speed m2.

[0112] The second prompting unit is used to indicate a fault in the oil pump drive system if the motor speed during injection molding is outside the preset standard range of motor speed m2.

[0113] In one possible embodiment of this application, the fault diagnosis device for the hydraulic injection molding machine includes:

[0114] The second prompt module is used to prompt a fault that the melt pressure setting value is too low when the current melt pressure is greater than or equal to the preset melt pressure standard range P1.

[0115] In one possible embodiment of this application, the fault diagnosis device for the hydraulic injection molding machine further includes:

[0116] The second judgment module is used to determine whether the current motor speed is within the preset motor speed standard range m2 when the injection speed is less than the preset injection speed standard range s2 and the current injection pressure is less than the preset injection pressure standard range p2 during injection of the injection molding machine.

[0117] The third prompt module is used to prompt a fault in the injection cylinder if the current motor speed is within the standard range m2 of the motor speed; and to prompt a fault message based on whether the motor speed during the injection molding machine melting is within the preset standard range M1 if the current motor speed is outside the standard range m2 of the motor speed.

[0118] In one possible implementation of this application, the third prompting module includes:

[0119] The third prompting unit is used to indicate a fault in the injection cylinder if the motor speed during the injection molding machine's melting process is within the preset standard range M1.

[0120] The fourth prompting unit is used to indicate a fault in the oil pump drive system if the motor speed during the melting of the injection molding machine is outside the preset standard range M1.

[0121] In one possible embodiment of this application, the fault diagnosis device for the hydraulic injection molding machine includes:

[0122] The fourth prompt module is used to prompt a fault that the injection pressure setting is too low when the current injection pressure is greater than or equal to the preset injection pressure standard range p2.

[0123] In one possible embodiment of this application, the fault diagnosis device for the hydraulic injection molding machine includes:

[0124] The switching module is used to control the injection molding machine to stop after the injection cycle ends when a fault is indicated, and to switch the current automatic mode to manual mode.

[0125] The specific implementation of the fault diagnosis device for the hydraulic injection molding machine in this application is basically the same as the various embodiments of the fault diagnosis method for the hydraulic injection molding machine described above, and will not be repeated here.

[0126] Example 5

[0127] Furthermore, based on all the above embodiments, another embodiment of this application is provided. In this embodiment, a fault diagnosis device for a hydraulic injection molding machine is provided. The fault diagnosis device for the hydraulic injection molding machine is a physical node device. The fault diagnosis device for the hydraulic injection molding machine includes: a memory, a processor, and a program stored in the memory for implementing the fault diagnosis method of the hydraulic injection molding machine. The memory is used to store the program for implementing the fault diagnosis method of the hydraulic injection molding machine; the processor is used to execute the program for implementing the fault diagnosis method of the hydraulic injection molding machine to implement the steps of the fault diagnosis method of the hydraulic injection molding machine in the above embodiments.

[0128] Reference Figure 5 , Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.

[0129] like Figure 5 As shown, the fault diagnosis device for this hydraulic injection molding machine may include: a processor 1001, such as a CPU, a memory 1005, and a communication bus 1002. The communication bus 1002 is used to establish communication between the processor 1001 and the memory 1005. The memory 1005 may be a high-speed RAM or a stable, non-volatile memory, such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0130] In one possible embodiment of this application, the fault diagnosis device for the hydraulic injection molding machine may further include a network interface, audio circuit, display, connecting cable, sensor, input module, etc. The network interface may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface or a Bluetooth interface), and the input module may optionally include a keyboard, a system soft keyboard, voice input, wireless receiver input, etc.

[0131] Those skilled in the art will understand that the structure of the fault diagnosis device for a hydraulic injection molding machine does not constitute a limitation on the fault diagnosis device for a hydraulic injection molding machine, and may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0132] The memory, as a computer storage medium, may include an operating system, an information exchange module, and a fault diagnosis program for the hydraulic injection molding machine. The operating system is a program that manages and controls the hardware and software resources of the fault diagnosis equipment for the hydraulic injection molding machine, supporting the operation of the fault diagnosis program and other software and / or programs. The information exchange module is used to enable communication between the various components within the memory, as well as communication with other hardware and software in the management system.

[0133] In the fault diagnosis device for hydraulic injection molding machines, the processor is used to execute the fault diagnosis program for hydraulic injection molding machines stored in the memory, and to implement the above-mentioned fault diagnosis steps for hydraulic injection molding machines.

[0134] The specific implementation method of the fault diagnosis device for hydraulic injection molding machines in this application is basically the same as the various embodiments of the fault diagnosis method for hydraulic injection molding machines described above, and will not be repeated here.

[0135] Example 6

[0136] This application provides a storage medium that stores one or more programs, which can be executed by one or more processors to implement the steps of the fault diagnosis method for hydraulic injection molding machines described in the above embodiments.

[0137] The specific implementation of the storage medium in this application is basically the same as the various embodiments of the fault diagnosis method for hydraulic injection molding machines described above, and will not be repeated here.

[0138] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0139] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0140] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM or RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0141] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A fault diagnosis method for a hydraulic injection molding machine, wherein the hydraulic injection molding machine uses an oil pump to drive a screw rotation via a melt motor and a screw movement via an injection cylinder, the oil pump being driven by an electric motor, characterized in that... When melting the plastic in the injection molding machine, match the screw speed standard range G1 with the motor speed standard range M1; match the injection speed standard range s2 with the motor speed standard range m2; If it is determined that the current screw speed is less than the preset screw speed standard range G1 and the current melt pressure is less than the preset melt pressure standard range P1, then determine whether the current motor speed is within the preset motor speed standard range M1. If the current motor speed is within the standard range M1, a melt motor fault is indicated; if the current motor speed is outside the standard range M1, a fault message is indicated based on whether the motor speed during injection molding is within the preset standard range m2. The fault message provided, based on whether the motor speed during injection molding is within the preset standard range (m²) of the motor speed, includes: If the motor speed during injection molding is within the preset standard range of motor speed (m2), a melt motor malfunction is indicated. If the motor speed during injection molding is outside the preset standard range of motor speed (m2), it indicates a fault in the oil pump drive system.

2. The fault diagnosis method for a hydraulic injection molding machine according to claim 1, characterized in that, When the current melt pressure is greater than or equal to the preset melt pressure standard range P1, a fault message indicating that the melt pressure setting value is too low will be displayed.

3. The hydraulic injection molding machine failure determination method according to claim 1, characterized by, The fault diagnosis method for the hydraulic injection molding machine also includes: during the injection molding process, If it is determined that the current injection speed is less than the preset injection speed standard range s2 and the current injection pressure is less than the preset injection pressure standard range p2, then determine whether the current motor speed is within the preset motor speed standard range m2. If the current motor speed is within the standard range m2, a fault is indicated in the injection cylinder; if the current motor speed is outside the standard range m2, a fault message is indicated based on whether the motor speed during injection molding is within the preset standard range M1.

4. The hydraulic injection molding machine failure determination method according to claim 3, characterized by The fault message provided, based on whether the motor speed during injection molding is within the preset standard range M1, includes: If the motor speed of the injection molding machine is within the preset standard range M1 when the glue is melting, it indicates a problem with the injection cylinder. If the motor speed of the injection molding machine during melting is outside the preset standard range M1, it indicates a fault in the oil pump drive system.

5. The fault diagnosis method for a hydraulic injection molding machine according to claim 3, characterized in that, When the current injection pressure is greater than or equal to the preset injection pressure standard range p2, an error message will be displayed indicating that the injection pressure setting value is too low.

6. The hydraulic injection molding machine failure determination method according to any one of claims 1 to 5, characterized by, Also includes: When a fault is detected, the injection molding machine will stop after the injection cycle ends and the current automatic mode will be switched to manual mode.

7. A fault judging device for a hydraulic injection molding machine, the hydraulic injection molding machine achieving rotation of a glue melting motor driving screw and movement of a glue injection cylinder driving screw by an oil pump respectively, the oil pump being driven by a motor, characterized in that, The fault diagnosis device for the hydraulic injection molding machine includes: The matching module is used to match the standard range of screw speed G1 with the standard range of motor speed M1 during the melting process of the injection molding machine; and to match the standard range of injection speed s2 with the standard range of motor speed m2. The first judgment module is used to determine whether the current motor speed is within the preset motor speed standard range M1 if the current screw speed is less than the preset screw speed standard range G1 and the current melt pressure is less than the preset melt pressure standard range P1. The prompting module is used to prompt a melt motor malfunction if the current motor speed is within the standard range M1 of the motor speed; and to prompt a fault message based on whether the motor speed during injection molding is within the preset standard range m2 of the motor speed if the current motor speed is outside the standard range M1 of the motor speed. The prompt module includes: The first prompting unit is used to indicate a malfunction of the melt motor if the motor speed during injection molding is within the preset standard range of motor speed m2. The second prompting unit is used to indicate a fault in the oil pump drive system if the motor speed during injection molding is outside the preset standard range of motor speed m2.

8. A fault diagnosis device for a hydraulic injection molding machine, characterized in that, The system includes a memory, a processor, and a fault diagnosis program for a hydraulic injection molding machine stored in the memory and executable on the processor. The processor executes the fault diagnosis program for the hydraulic injection molding machine to implement the steps of the fault diagnosis method for the hydraulic injection molding machine according to any one of claims 1 to 6.

9. A storage medium, characterized by The storage medium stores a program for implementing a fault diagnosis method for a hydraulic injection molding machine. The program for implementing the fault diagnosis method for a hydraulic injection molding machine is executed by a processor to implement the steps of the fault diagnosis method for a hydraulic injection molding machine as described in any one of claims 1 to 6.

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