Fault determination method, apparatus and device for hydraulic injection molding machine, and storage medium

Abstract

The present application belongs to the technical field of injection molding, and relates to a fault determination method, apparatus and device for a hydraulic injection molding machine, and a storage medium. The method comprises: when a hydraulic injection molding machine performs plastic melting, performing matching on a standard range G1 of the rotation speed of a screw, a standard range M1 of the rotation speed of an electric motor and a standard range m2 of the rotation speed of the electric motor; when the current rotation speed of the screw is less than the range G1, and the current plastic melting pressure is less than a standard range P1 of plastic melting pressure, determining whether the current rotation speed of the electric motor is within the range M1; when the current rotation speed of the electric motor is within the range M1, prompting a fault in a plastic melting motor; and when the current rotation speed of the electric motor is outside the range M1, prompting fault information on the basis of whether the rotation speed of the electric motor when the injection molding machine performs plastic injection is within the range m2.

Description

Fault diagnosis method, device, equipment and storage medium for hydraulic injection molding machine

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202311260677.4, filed on September 26, 2023, entitled “Fault Judgment Method, Device, Equipment and Storage Medium for Hydraulic Injection Molding Machine,” the entire text of which is hereby incorporated by reference. Technical Field

[0003] The present 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 Art

[0004] Currently, hydraulic plastic injection molding machines (hereafter referred to as hydraulic injection molding machines) rely on compression molding to form parts. They typically use an oil pump as their power source (both for injection and melt molding), an oil motor as the drive mechanism for the melt screw, and an injection cylinder as the injection drive. During the production process, the oil pump, oil motor, and injection cylinder, the hydraulic core of the injection molding machine, typically operate in a state of continuous, high-speed reciprocating motion under high torque and high pressure. Prolonged, continuous operation can cause physical changes in the key mechanical components of the oil pump and oil motor, as well as the piston of the oil cylinder. These changes can lead to heat generation, wear, and internal leakage, which can affect machine stability. In severe cases, iron filings generated by wear can enter the machine's hydraulic lines, damaging the hydraulic system and causing the machine to malfunction and potentially damage.

[0005] In the related art, 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, in the related art, the fault of the hydraulic injection molding machine is not discovered in time, which makes the machine easy to be damaged.

[0006] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art.

[0007] Summary of the Invention

[0008] According to various embodiments disclosed in the present application, a fault diagnosis method, device, equipment, and storage medium for a hydraulic injection molding machine are provided.

[0009] A fault diagnosis method for a hydraulic injection molding machine, wherein the hydraulic injection molding machine uses an oil pump to realize a melt motor driving a screw to rotate, and the oil pump is driven by an electric motor, the method comprising:

[0010] When the hydraulic injection molding machine melts glue, the screw speed standard range G1, the motor speed standard range M1 and the motor speed standard range m2 are matched;

[0011] 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, determine whether the current motor speed is within the preset motor speed standard range M1; and

[0012] When the current motor speed is within the motor speed standard range M1, the melt motor fault is prompted; when the current motor speed is outside the motor speed standard range M1, fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2.

[0013] In one embodiment, the fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within a preset motor speed standard range m2, including:

[0014] When the motor speed of the hydraulic injection molding machine during injection molding is within a preset motor speed standard range m2, a prompt is given that the melt motor is faulty; and

[0015] When the motor speed of the hydraulic injection molding machine during injection molding is outside the preset motor speed standard range m2, it indicates that the oil pump drive system is faulty.

[0016] In one embodiment, the further embodiment includes: when the current melt pressure is greater than or equal to the preset melt pressure standard range P1, prompting a melt pressure setting value too low fault.

[0017] In one embodiment, the method further includes: when a fault is prompted, controlling the hydraulic injection molding machine to stop after the injection cycle is completed, and switching the current automatic mode to the manual mode.

[0018] A fault diagnosis method for a hydraulic injection molding machine, wherein the hydraulic injection molding machine realizes movement of a screw driven by an injection cylinder through an oil pump, wherein the oil pump is driven by a motor, and the method comprises:

[0019] When the hydraulic injection molding machine is injecting glue, the injection speed standard range s2, the motor speed standard range M1 and the motor speed standard range m2 are matched;

[0020] When 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, it is determined whether the current motor speed is within the preset motor speed standard range m2; and

[0021] When the current motor speed is within the motor speed standard range m2, the injection cylinder fault is prompted; when the current motor speed is outside the motor speed standard range m2, fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1.

[0022] In one embodiment, the fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during melt molding is within a preset motor speed standard range M1, including:

[0023] When the motor speed of the hydraulic injection molding machine during glue melting is within a preset motor speed standard range M1, a prompt is given that the injection cylinder is faulty; and

[0024] When the motor speed of the hydraulic injection molding machine during melting is outside the preset motor speed standard range M1, it indicates that the oil pump drive system is faulty.

[0025] In one embodiment, the further embodiment includes: when the current injection pressure is greater than or equal to the preset injection pressure standard range p2, prompting a fault of the injection pressure setting value being too low.

[0026] In one embodiment, the method further includes: when a fault is prompted, controlling the hydraulic injection molding machine to stop after the injection cycle is completed, and switching the current automatic mode to the manual mode.

[0027] A fault diagnosis device for a hydraulic injection molding machine, wherein the hydraulic injection molding machine uses an oil pump to realize a melt motor driving a screw to rotate, and the oil pump is driven by an electric motor. The fault diagnosis device for the hydraulic injection molding machine comprises:

[0028] A matching module, used for matching the screw speed standard range G1, the motor speed standard range M1 and the motor speed standard range m2 when the hydraulic injection molding machine melts glue;

[0029] A first judgment module is used to judge whether the current motor speed is within a preset motor speed standard range M1 when it is judged that the current screw speed is less than a preset screw speed standard range G1 and the current melt pressure is less than a preset melt pressure standard range P1; and

[0030] The first prompt module is used to prompt that the melt motor has failed when the current motor speed is within the motor speed standard range M1; and to prompt fault information based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2 when the current motor speed is outside the motor speed standard range M1.

[0031] A fault diagnosis device for a hydraulic injection molding machine, wherein the hydraulic injection molding machine realizes the movement of a screw driven by an injection cylinder through an oil pump, wherein the oil pump is driven by a motor, and the fault diagnosis device for the hydraulic injection molding machine comprises:

[0032] A matching module, used for matching the injection speed standard range s2, the motor speed standard range M1 and the motor speed standard range m2 when the hydraulic injection molding machine is injecting glue;

[0033] The second judgment module is used to judge whether the current motor speed is within the preset motor speed standard range m2 when it is judged 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; and

[0034] The third prompt module is used to prompt the injection cylinder failure when the current motor speed is within the motor speed standard range m2; when the current motor speed is outside the motor speed standard range m2, prompt fault information based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1.

[0035] 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 and includes: a memory, one or more processors, and computer-readable instructions for fault diagnosis of the hydraulic injection molding machine stored in the memory and executable on the one or more processors. When the one or more processors execute the computer-readable instructions for fault diagnosis of the hydraulic injection molding machine, the following steps are implemented:

[0036] When the hydraulic injection molding machine melts glue, the screw speed standard range G1, the motor speed standard range M1 and the motor speed standard range m2 are matched;

[0037] 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, determine whether the current motor speed is within the preset motor speed standard range M1; and

[0038] When the current motor speed is within the motor speed standard range M1, a melt motor fault is prompted; when the current motor speed is outside the motor speed standard range M1, a fault message is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2.

[0039] One or more computer storage media, wherein the computer storage media stores computer-readable instructions for implementing a fault diagnosis method for a hydraulic injection molding machine, wherein when the computer-readable instructions for implementing a fault diagnosis method for a hydraulic injection molding machine are executed by one or more processors, the one or more processors perform the following steps:

[0040] When the hydraulic injection molding machine melts glue, the screw speed standard range G1, the motor speed standard range M1 and the motor speed standard range m2 are matched;

[0041] 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, determine whether the current motor speed is within the preset motor speed standard range M1; and

[0042] When the current motor speed is within the motor speed standard range M1, a melt motor fault is prompted; when the current motor speed is outside the motor speed standard range M1, a fault message is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2.

[0043] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] FIG1 is a schematic diagram of a flow chart of a method for determining a fault of a hydraulic injection molding machine according to one or more embodiments;

[0046] FIG2 is a schematic diagram showing the connection relationship between various components of a hydraulic injection molding machine in a fault diagnosis method for a hydraulic injection molding machine according to one or more embodiments;

[0047] FIG3 is a schematic diagram of the overall process involved in the fault judgment method of the hydraulic injection molding machine according to one or more embodiments.

[0048] FIG4 is a second flow chart of a method for determining a fault of a hydraulic injection molding machine according to one or more embodiments;

[0049] FIG5 is a third flow chart of a method for determining a fault of a hydraulic injection molding machine according to one or more embodiments;

[0050] FIG6 is a schematic diagram of a fault determination device for a hydraulic injection molding machine according to one or more embodiments;

[0051] FIG7 is a second schematic diagram of a fault determination device for a hydraulic injection molding machine according to one or more embodiments;

[0052] FIG8 is a schematic diagram of the device structure of the hardware operating environment involved in the fault judgment method of the hydraulic injection molding machine according to one or more embodiments. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0054] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0055] 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 solely to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, 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 term "if," as used herein, may be interpreted as "upon," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the recited features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used herein, may be interpreted as inclusive, meaning any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”; and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0056] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0057] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0058] It should be noted that in this article, step codes such as S10 and S20 are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial limitation on the order. When implementing the step, those skilled in the art may execute S20 first and then S10, etc., but these should all be within the scope of protection of this application.

[0059] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0060] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0061] To make the above-mentioned purposes, features, and advantages of the present application more clearly understood, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0062] The present application provides a fault diagnosis method for a hydraulic injection molding machine. In some embodiments, the hydraulic injection molding machine uses an oil pump to respectively realize that a melt motor drives a screw to rotate and an injection cylinder drives a screw to move. The oil pump is driven by a motor. Referring to FIG. 1 , the method includes:

[0063] Step S10 , when the hydraulic injection molding machine melts glue, matching the screw speed standard range G1 , the motor speed standard range M1 and the motor speed standard range m2 .

[0064] In this embodiment, the execution subject of the fault judgment method of the hydraulic injection molding machine is a fault judgment device of the hydraulic injection molding machine, and the fault judgment device of the hydraulic injection molding machine belongs to the hydraulic injection molding machine.

[0065] It can be understood that there are many hydraulic components in a hydraulic injection molding machine, among which the core hydraulic components are motors, oil pumps, oil motors and injection cylinders. The oil pumps are used to drive the screw to rotate and the injection cylinder to move, respectively. The oil pumps are driven by motors, as shown in Figure 2.

[0066] It can be understood that in this embodiment, the oil pump provides power for the melting stage (oil circuit) and the injection stage (oil circuit), wherein the oil motor serves as the driving mechanism for the rotation of the melting screw, and the injection cylinder serves as the injection drive.

[0067] In this embodiment, during the melt and injection processes, as shown in FIG2 , the same motor is used, and the motor is the driving source of the oil pump.

[0068] In this embodiment, the screw is a connecting rod between the above-mentioned core hydraulic components, which plays the role of power transmission. In the melting stage, the motor drives the screw to rotate, and in the injection stage, the cylinder drives the screw to move.

[0069] In this embodiment, during the process of melting or injecting the plastic workpiece to be processed by the hydraulic injection molding machine, fault diagnosis can be performed in real time without having to stop the melting or injecting process.

[0070] It is understandable that the plastic workpieces to be processed have different models and shapes.

[0071] In this embodiment, the plastic workpiece is formed by injection molding through a plastic workpiece gate. For example, if the hydraulic injection molding machine can process a plastic workpiece of a bull horn shape, the plastic workpiece gate is a bull horn gate. For example, the plastic workpiece gate can have a variety of shapes, such as a fan-shaped or semicircular shape. This is not limited to specific shapes.

[0072] In this embodiment, the raw material to be processed, such as solid plastic material, is first heated to melt it into a liquid state (melt). The liquid plastic is then pressurized to force it to flow, completing the injection molding process (shot). Finally, the plastic flows into the corresponding mold cavity of the workpiece. The mold cavity is equivalent to a physical model for the plastic workpiece, and different plastic workpieces have corresponding mold cavities.

[0073] In this embodiment, different types of plastic components have different effects on the hardness of the plastic workpiece, and different contents of plastic components also have different effects on the hardness of the plastic workpiece.

[0074] 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.

[0075] In this embodiment, after the fluid plastic is successfully injected into the mold cavity, it is still in a fluid state and needs to be allowed to solidify. This can be done by waiting for the plastic to cool down or by using a cooling device to cool the hot plastic. Once the plastic solidifies, the solidified plastic is removed from the mold cavity to obtain a plastic workpiece.

[0076] When a hydraulic injection molding machine is melting glue, the standard range of the corresponding motor speed is set to M1, and the standard range of the corresponding screw speed is set to G1. However, due to various reasons (due to failure or other reasons, etc.), the set motor speed M1 may be different from the actual motor speed, and the actual screw speed may not be within the standard range of the screw speed.

[0077] Similarly, the hydraulic injection molding machine can also obtain the injection speed standard range s2 and the motor speed standard range m2, that is, the corresponding motor speed standard range is set to m2, and the corresponding injection speed standard range is s2. However, due to various reasons such as failures, 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.

[0078] 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.

[0079] It can be understood that under normal circumstances, or when no fault occurs, 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 through actual measurement by the debugging personnel.

[0080] It can be understood that the standard range M1 of the motor speed can be 0.95V1 to 1.05V1, wherein V1 is the rated speed of the motor during melting.

[0081] It can be understood that the standard range of screw speed is G1, and G1 can be 0-0.95n1, where n1 is the rated speed of the screw during melting.

[0082] Step S20 , when 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 , it is determined whether the current motor speed is within the preset motor speed standard range M1 .

[0083] 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 melt pressure setting value too low fault is prompted. In this case, the melt pressure needs to be reset. For example, the melt pressure can be set to a value greater than P1 so that it meets the pressure requirements during the melt process, and then subsequent judgments can be made.

[0084] It can be understood that as shown in Figure 3, it is a schematic diagram of the overall process involved in the fault judgment method of the hydraulic injection molding machine according to one or more embodiments; referring to Figure 3, when the current melt pressure is less than the preset melt pressure standard range P1 (for example, the plastic raw material melted into liquid has good fluidity), at this time, the melt pressure meets the requirements, and then, if it is judged 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 (the oil pump drive system failure causes problems with the motor speed, and the motor speed has problems, resulting in problems with the screw speed), etc. At this time, 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 has failed.

[0085] Step S30, when the current motor speed is within the motor speed standard range M1, prompting a melt motor fault; when the current motor speed is outside the motor speed standard range M1, prompting a fault message based on whether the motor speed during injection of the hydraulic injection molding machine is within the preset motor speed standard range m2.

[0086] It can be understood that if the current motor speed is within the standard motor speed range M1, it is obvious that the melt motor is faulty, that is, there is no problem with the motor speed. At this time, there is no problem with the oil pump drive system that drives the motor. Only the melt motor failure will cause abnormal screw speed.

[0087] It can be understood that if the current motor speed is outside the motor speed standard range M1, it is obvious that there is a problem with the motor speed. At this time, a fault message is prompted. Of course, it can be further specifically determined which component has an abnormality.

[0088] That is, based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2, fault information is prompted, including:

[0089] When the motor speed of the hydraulic injection molding machine during injection molding is within the preset motor speed standard range m2, it prompts that the melt motor is faulty.

[0090] When the motor speed of the hydraulic injection molding machine is outside the preset motor speed standard range m2 during injection, it indicates that the oil pump drive system is faulty.

[0091] It can be understood that if the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2, it is obvious that the motor is working normally in the injection scenario (the motor speed is normal in the injection scenario). At this time, only the failure of the melt motor will cause abnormal screw speed.

[0092] It can be understood that, as shown in Figure 3, if the motor speed of the hydraulic injection molding machine during injection is outside the preset motor speed standard range m2, that is, the same problem of abnormal motor speed occurs in both the injection and melting scenarios. Obviously, the abnormal motor speed is caused by a failure of the oil pump drive system (servo drive system).

[0093] As an example, after determining that the melt motor is faulty, it needs to be replaced manually after the hydraulic injection molding machine is shut down.

[0094] In this embodiment, after the oil pump drive system fails, it needs to be replaced manually after the hydraulic injection molding machine is shut down.

[0095] The present application provides a fault judgment method, device, equipment and storage medium for a hydraulic injection molding machine. Compared with the related art, in which the fault of the hydraulic injection molding machine is not discovered in time, resulting in easy damage to the machine, it can be understood that in the present application, when the current melt pressure is less than the preset melt pressure standard range P1, it is obvious that there is no problem with the melt pressure setting. At this time, if it is judged 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 there is no problem with the motor speed (motor). At this time, it is prompted that the melt motor has a fault. If the current motor speed is outside the motor speed standard range M1 (the motor speed has Problem), based on whether the motor speed of the hydraulic injection molding machine during injection molding is within the preset motor speed standard range m2 (obviously, the motor speed of the hydraulic injection molding machine during injection molding is used to judge whether it is caused by motor failure or other reasons such as oil pump drive system failure), and then the corresponding fault information is prompted. That is, in the present application, in actual work, such corresponding data is monitored in real time, and it can be determined through calculation and logical judgment whether each component such as the motor, melt motor, etc. is in the normal working range. That is, in this embodiment, various faults of the hydraulic injection molding machine can be determined in time, thereby avoiding the corresponding faults from being repaired for a long time and causing damage to the hydraulic injection molding machine.

[0096] Furthermore, the present application also provides a fault diagnosis method for a hydraulic injection molding machine. It can be understood that the specific limitations in one or more embodiments provided below can refer to the limitations above and will not be repeated here.

[0097] In some embodiments, the hydraulic injection molding machine realizes the movement of the injection cylinder and the screw respectively through an oil pump, and the oil pump is driven by a motor. Referring to FIG. 4 , the method includes:

[0098] Step S40 , when the hydraulic injection molding machine is injecting glue, matching the injection speed standard range s2 , the motor speed standard range M1 and the motor speed standard range m2 .

[0099] Step S50: When 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, it is determined whether the current motor speed is within the preset motor speed standard range m2.

[0100] When a hydraulic injection molding machine is injecting glue, 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 failures, the set motor speed m2 may be different from the actual motor speed, and the corresponding injection speed may not be within the standard range s2.

[0101] Therefore, in this embodiment, when the hydraulic injection molding machine is injecting glue, the current injection speed is matched with the preset injection speed standard range s2.

[0102] It can be understood that under normal circumstances, or when no fault occurs, when the standard range of motor speed is m2, the corresponding standard range of melting speed is s2. This is verified or obtained through actual measurement by the debugging personnel.

[0103] It can be understood that the standard range of motor speed m2 can be 0.95V2 to 1.05V2, where V2 is the rated speed of the motor during injection molding.

[0104] It is understood that, as shown in FIG3 , in this application, when the current injection pressure is greater than or equal to the preset injection pressure standard range p2, a fault indicating that the injection pressure setting value is too low is prompted. In this case, the injection pressure needs to be reset. For example, the injection pressure can be set to a value greater than p2 so that it meets the pressure requirement during the injection process, and then subsequent judgments can be made.

[0105] It can be understood that when the current injection pressure is less than the preset injection pressure standard range p2, the injection pressure meets the requirements. Furthermore, if it is judged that the current injection speed is less than the preset injection speed standard range s2, it may be a failure of the injection cylinder or a failure of the oil pump drive system (a failure of the oil pump drive system causes a problem with the motor speed), etc., and further determination is required at this time.

[0106] Step S60: When the current motor speed is within the motor speed standard range m2, prompting a fault in the injection cylinder; when the current motor speed is outside the motor speed standard range m2, prompting a fault message based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1.

[0107] It can be understood that, as shown in Figure 3, if the current motor speed is within the standard range of motor speed m2, it is obvious that the injection cylinder is faulty, that is, there is no problem with the motor speed. At this time, there is no problem with the oil pump drive system that drives the motor. Only the injection cylinder fault will cause the screw speed to be abnormal.

[0108] It can be understood that if the current motor speed is outside the motor speed standard range m2, it is obvious that there is a problem with the motor speed. At this time, a fault message is prompted. Of course, it can be further specifically determined which component has an abnormality.

[0109] That is, based on whether the motor speed of the hydraulic injection molding machine during melt molding is within the preset motor speed standard range M1, fault information is prompted, including:

[0110] When the motor speed of the hydraulic injection molding machine during glue melting is within the preset motor speed standard range M1, it prompts that the glue injection cylinder is faulty.

[0111] When the motor speed of the hydraulic injection molding machine is outside the preset motor speed standard range M1 during melting, it indicates that the oil pump drive system is faulty.

[0112] It can be understood that if the motor speed of the hydraulic injection molding machine during glue melting is within the preset motor speed standard range M1, it is obvious that the motor is working normally in the glue melting scenario (the motor speed is normal in the glue melting scenario). At this time, only a failure of the injection cylinder will cause the corresponding abnormal situation (the current motor speed during glue injection is outside the motor speed standard range m2, and the motor speed during glue melting is within the preset motor speed standard range M1).

[0113] It can be understood that, as shown in Figure 3, if the motor speed of the hydraulic injection molding machine during melting is outside the preset motor speed standard range M1, it indicates that the oil pump drive system is faulty. That is, the same problem, that is, abnormal motor speed, occurs in both the melting and injection scenarios. Obviously, the abnormal motor speed is caused by a fault in the oil pump drive system (servo drive system).

[0114] As an example, after determining that the injection cylinder is faulty, it needs to be replaced manually after the hydraulic injection molding machine is shut down.

[0115] In this embodiment, after the oil pump drive system fails, it needs to be replaced manually after the hydraulic injection molding machine is shut down.

[0116] The present application provides a fault judgment method, device, equipment and storage medium for a hydraulic injection molding machine. Compared with the related art, in which the injection fault of the hydraulic injection molding machine is not discovered in time, resulting in easy damage to the machine, it can be understood that in the present application, if it is judged 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, it is judged whether the current motor speed is within the preset motor speed standard range m2; if the current motor speed is within the motor speed standard range m2, then an injection cylinder fault is prompted; if the current motor speed is outside the motor speed standard range m2, based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1, a fault message is prompted. That is, in the present application, in actual work, such corresponding data is monitored in real time, and it can be determined through calculation and logical judgment whether each component such as the motor, injection cylinder, etc. is in the normal working range. That is, in this embodiment, various faults of the hydraulic injection molding machine can be determined in time, thereby avoiding the corresponding fault from being repaired for a long time and causing damage to the hydraulic injection molding machine.

[0117] Furthermore, based on the above embodiments of the present application, other embodiments of the present application are provided. In some embodiments, referring to FIG. 5 , the following further aspects are included:

[0118] Step S70: When a fault is prompted, the hydraulic injection molding machine is controlled to stop after the injection cycle is completed, and the current automatic mode is switched to the manual mode.

[0119] In this embodiment, when a fault is prompted, the hydraulic injection molding machine is controlled to stop after the injection cycle ends, and the current automatic mode is switched to the manual mode. If it is currently in the melting stage, the hydraulic injection molding machine is controlled to stop after the injection cycle ends, and the current automatic melting mode is switched to the manual melting mode. If it is currently in the injection stage, the hydraulic injection molding machine is controlled to stop after the injection cycle ends, and the current automatic injection mode is switched to the manual injection mode.

[0120] It can be understood that in this embodiment, when a fault is prompted, the hydraulic injection molding machine is controlled to stop after the injection cycle is completed, and the current automatic mode is switched to manual mode. Therefore, the fault can be eliminated or cleared in time in manual mode to avoid affecting the stability of the machine or causing damage to the machine.

[0121] Further, based on all the above embodiments, other embodiments of the present application are provided. In some embodiments of the present application, as shown in FIG6 , the present application provides a fault diagnosis device for a hydraulic injection molding machine. The hydraulic injection molding machine uses an oil pump to respectively realize the melt motor driving the screw to rotate. The oil pump is driven by an electric motor. The fault diagnosis device for the hydraulic injection molding machine includes:

[0122] Matching module, used to match the screw speed standard range G1, motor speed standard range M1 and motor speed standard range m2 when melting glue in a hydraulic injection molding machine;

[0123] The first judgment module is used to prompt a melt motor fault when the current motor speed is within the motor speed standard range M1; when the current motor speed is outside the motor speed standard range M1, prompt a fault message based on whether the motor speed during injection of the hydraulic injection molding machine is within a preset motor speed standard range m2;

[0124] The first prompt module is used to prompt a melt motor fault when the current motor speed is within the motor speed standard range M1; when the current motor speed is outside the motor speed standard range M1, the fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2.

[0125] In some embodiments of the present application, the first prompt module further includes:

[0126] The first prompting unit is used to prompt a melt motor failure when the motor speed of the hydraulic injection molding machine during injection is within a preset motor speed standard range m2;

[0127] The second prompting unit is used to prompt that the oil pump drive system is faulty when the motor speed of the hydraulic injection molding machine is outside the preset motor speed standard range m2 during injection.

[0128] In some embodiments of the present application, the fault judgment device of the hydraulic injection molding machine also includes a second prompt module, which is used to prompt a fault of the melt pressure setting value being too low when the current melt pressure is greater than or equal to the preset melt pressure standard range P1.

[0129] In some embodiments of the present application, the fault judgment device of the hydraulic injection molding machine further includes: a switching module for controlling the injection molding machine to stop after the injection cycle when a fault is prompted, and switching the current automatic mode to the manual mode.

[0130] Furthermore, based on all the above embodiments, other embodiments of the present application are provided. In some embodiments of the present application, as shown in FIG7 , the present application further provides a fault diagnosis device for a hydraulic injection molding machine. The hydraulic injection molding machine uses an oil pump to realize the movement of the injection cylinder driving the screw, and the oil pump is driven by a motor:

[0131] The fault judgment device of the hydraulic injection molding machine includes:

[0132] The matching module is used to match the injection speed standard range s2, the motor speed standard range M1 and the motor speed standard range m2 when the hydraulic injection molding machine injects glue.

[0133] The second judgment module is used to judge whether the current motor speed is within the preset motor speed standard range m2 when it is judged 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.

[0134] The third prompt module is used to prompt an injection cylinder fault when the current motor speed is within the motor speed standard range m2; when the current motor speed is outside the motor speed standard range m2, it prompts fault information based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1.

[0135] In some embodiments of the present application, the third prompt module further includes:

[0136] The third prompting unit is used to prompt that the injection cylinder is faulty when the motor speed of the hydraulic injection molding machine is within a preset motor speed standard range M1 during the melting process;

[0137] The fourth prompt unit is used to prompt an oil pump drive system failure when the motor speed of the hydraulic injection molding machine during melting is outside the preset motor speed standard range M1.

[0138] In some embodiments of the present application, the fault judgment device of the hydraulic injection molding machine further includes a fourth prompt module, which is used to prompt a fault of the injection pressure setting value being too low when the current injection pressure is greater than or equal to the preset injection pressure standard range p2.

[0139] In some embodiments of the present application, the fault judgment device of the hydraulic injection molding machine further includes: a switching module for controlling the hydraulic injection molding machine to stop after the injection cycle when a fault is prompted, and switching the current automatic mode to manual mode.

[0140] The specific implementation of the fault diagnosis device for a hydraulic injection molding machine of the present application is substantially the same as the various embodiments of the fault diagnosis method for a hydraulic injection molding machine described above and will not be further described here. The various modules in the fault diagnosis device for a hydraulic injection molding machine described above can be implemented in whole or in part through software, hardware, or a combination thereof. The aforementioned modules can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a memory in a computer device in software form, so that the processor can call and execute the operations corresponding to the aforementioned modules.

[0141] Furthermore, based on all the above embodiments, other embodiments of the present application are provided. In some embodiments, a fault judgment device for a hydraulic injection molding machine is provided. The fault judgment device for a hydraulic injection molding machine is a physical node device. The fault judgment device for a hydraulic injection molding machine includes: a memory, one or more processors, and computer-readable instructions for implementing a fault judgment method for a hydraulic injection molding machine stored on the memory. The memory is used to store computer-readable instructions for implementing the fault judgment method for a hydraulic injection molding machine; one or more processors are used to execute computer-readable instructions for implementing the fault judgment method for a hydraulic injection molding machine, so as to implement the steps of the fault judgment method for a hydraulic injection molding machine in the above embodiments.

[0142] Refer to Figure 8, which is a schematic diagram of the device structure of the hardware operating environment involved in some embodiments of the present application.

[0143] As shown in FIG8 , the fault diagnosis device for the hydraulic injection molding machine may include: a processor 1001, such as a CPU, a memory 1005, and a communication bus 1002. Communication bus 1002 is used to connect and communicate between processor 1001 and memory 1005. Memory 1005 may be a high-speed RAM memory or a non-volatile memory, such as a disk drive. Memory 1005 may also optionally be a storage device independent of processor 1001.

[0144] In some embodiments of the present application, the fault judgment device of the hydraulic injection molding machine may also include a network interface, an audio circuit, a display, a connecting line, a sensor, an input module, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface, a Bluetooth interface), and the input module may optionally include a keyboard, a system soft keyboard, voice input, wireless receiving input, etc.

[0145] Those skilled in the art will understand that the structure of the fault diagnosis device of the hydraulic injection molding machine does not constitute a limitation on the fault diagnosis device of the hydraulic injection molding machine, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0146] The memory, a computer storage medium, may include an operating system, an information exchange module, and computer-readable instructions for fault diagnosis of the hydraulic injection molding machine. The operating system is a computer-readable instruction set that manages and controls the hardware and software resources of the hydraulic injection molding machine's fault diagnosis equipment, supporting the execution of the computer-readable instructions for fault diagnosis of the hydraulic injection molding machine and other software and / or computer-readable instructions. The information exchange module is used to enable communication between components within the memory and with other hardware and software in the management system.

[0147] In the fault judgment device for the hydraulic injection molding machine, one or more processors are used to execute the computer-readable instructions for fault judgment of the hydraulic injection molding machine stored in the memory to implement the above-mentioned steps of fault judgment of the hydraulic injection molding machine.

[0148] The specific implementation of the fault judgment device of the hydraulic injection molding machine of the present application is basically the same as the various embodiments of the fault judgment method of the hydraulic injection molding machine mentioned above, and will not be repeated here.

[0149] An embodiment of the present application provides one or more computer storage media, and the computer storage medium stores one or more computer-readable instructions, and the one or more computer-readable instructions can also be executed by one or more processors to implement the steps of the fault judgment method of the hydraulic injection molding machine in the above embodiment.

[0150] The computer storage medium is a readable storage medium, which may be non-volatile or volatile.

[0151] The specific implementation of the storage medium of the present application is basically the same as the various embodiments of the fault judgment method of the hydraulic injection molding machine mentioned above, and will not be repeated here.

[0152] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0153] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0154] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course 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 the present application, or the part that contributes to the relevant technology, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM or RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0155] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A fault diagnosis method for a hydraulic injection molding machine, wherein the hydraulic injection molding machine realizes the rotation of the screw driven by the melt motor through an oil pump, and the oil pump is driven by a motor, wherein: The method comprises: When the hydraulic injection molding machine melts glue, the screw speed standard range G1, the motor speed standard range M1 and the motor speed standard range m2 are matched; When 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, it is determined whether the current motor speed is within the preset motor speed standard range M1; and When the current motor speed is within the motor speed standard range M1, the melt motor fault is prompted; when the current motor speed is outside the motor speed standard range M1, fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2.

2. The fault diagnosis method of the hydraulic injection molding machine according to claim 1, wherein: The fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2, including: When the motor speed of the hydraulic injection molding machine during injection molding is within a preset motor speed standard range m2, a prompt is given that the melt motor is faulty; and When the motor speed of the hydraulic injection molding machine during injection molding is outside the preset motor speed standard range m2, it indicates that the oil pump drive system is faulty.

3. The fault diagnosis method of the hydraulic injection molding machine according to claim 1, wherein: Also includes: When the current melt pressure is greater than or equal to the preset melt pressure standard range P1, a fault indicating that the melt pressure setting value is too low is prompted.

4. The fault diagnosis method of a hydraulic injection molding machine according to any one of claims 1 to 3, wherein: Also includes: When a fault is prompted, the hydraulic injection molding machine is controlled to stop after the injection molding cycle is completed, and the current automatic mode is switched to the manual mode.

5. A fault diagnosis method for a hydraulic injection molding machine, wherein the hydraulic injection molding machine realizes the movement of the injection cylinder driving the screw by an oil pump, and the oil pump is driven by a motor, wherein: The method comprises: When the hydraulic injection molding machine is injecting glue, the injection speed standard range s2, the motor speed standard range M1 and the motor speed standard range m2 are matched; When 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, it is determined whether the current motor speed is within the preset motor speed standard range m2; and When the current motor speed is within the motor speed standard range m2, the injection cylinder fault is prompted; when the current motor speed is outside the motor speed standard range m2, fault information is prompted based on whether the motor speed of the hydraulic injection molding machine when melting glue is within the preset motor speed standard range M1.

6. The fault diagnosis method of the hydraulic injection molding machine according to claim 5, wherein: The fault information is prompted based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1, including: When the motor speed of the hydraulic injection molding machine during melting is within a preset motor speed standard range M1, a prompt is given that the injection cylinder is faulty; and When the motor speed of the hydraulic injection molding machine during melting is outside the preset motor speed standard range M1, it indicates that the oil pump drive system is faulty.

7. The fault diagnosis method of a hydraulic injection molding machine according to claim 5, wherein: Also includes: When the current injection pressure is greater than or equal to the preset injection pressure standard range p2, it prompts that the injection pressure setting value is too low.

8. The fault diagnosis method of a hydraulic injection molding machine according to any one of claims 5 to 7, wherein: Also includes: When a fault is prompted, the hydraulic injection molding machine is controlled to stop after the injection molding cycle is completed, and the current automatic mode is switched to the manual mode.

9. A fault diagnosis device for a hydraulic injection molding machine, wherein the hydraulic injection molding machine realizes the rotation of the screw driven by the melt motor through an oil pump, and the oil pump is driven by an electric motor, wherein: The fault judgment device of the hydraulic injection molding machine comprises: A matching module, used for matching the screw speed standard range G1, the motor speed standard range M1 and the motor speed standard range m2 when the hydraulic injection molding machine is melting glue; A first judgment module is used to judge whether the current motor speed is within a preset motor speed standard range M1 when it is judged that the current screw speed is less than a preset screw speed standard range G1 and the current melt pressure is less than a preset melt pressure standard range P1; and The first prompt module is used to prompt the failure of the melt motor when the current motor speed is within the motor speed standard range M1; when the current motor speed is outside the motor speed standard range M1, based on whether the motor speed of the hydraulic injection molding machine during injection is within the preset motor speed standard range m2, prompt fault information.

10. A fault diagnosis device for a hydraulic injection molding machine, wherein the hydraulic injection molding machine realizes the movement of the injection cylinder driving the screw by an oil pump, and the oil pump is driven by a motor, wherein: The fault judgment device of the hydraulic injection molding machine comprises: A matching module, used for matching the injection speed standard range s2, the motor speed standard range M1 and the motor speed standard range m2 when the hydraulic injection molding machine is injecting glue; The second judgment module is used to judge whether the current motor speed is within the preset motor speed standard range m2 when judging 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; and The third prompt module is used to prompt the injection cylinder failure when the current motor speed is within the motor speed standard range m2; when the current motor speed is outside the motor speed standard range m2, prompt fault information based on whether the motor speed of the hydraulic injection molding machine during melting is within the preset motor speed standard range M1.

11. A fault diagnosis device for a hydraulic injection molding machine, wherein: The method comprises a memory, one or more processors and computer-readable instructions for fault judgment of a hydraulic injection molding machine stored in the memory and executable on the one or more processors, wherein the one or more processors execute the computer-readable instructions for fault judgment of the hydraulic injection molding machine to implement the steps of the method for fault judgment of a hydraulic injection molding machine described in any one of claims 1 to 8.

12. One or more computer storage media, wherein: The computer storage medium stores computer-readable instructions for implementing a fault judgment method for a hydraulic injection molding machine, and the computer-readable instructions for implementing a fault judgment method for a hydraulic injection molding machine are executed by one or more processors to implement the steps of the fault judgment method for a hydraulic injection molding machine as described in any one of claims 1 to 8.

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