Abnormality self-diagnosis method of injection molding machine

Abstract

The invention discloses an abnormity self-diagnosis method for an injection molding machine. The abnormity self-diagnosis method is characterized by comprising the following steps that a controller of the injection molding machine outputs a power instruction and a valve control instruction; acquiring at least one performance parameter of the injection molding machine in real time through the controller; judging whether the obtained performance parameters meet a preset standard or not; and obtaining a diagnosis result. The method has the advantages that by acquiring the relevant performance parameters of the injection molding machine in real time and judging whether the corresponding performance parameters are within the preset standard, the abnormity self-diagnosis of the injection molding machine is realized, an operator can be helped to quickly and accurately diagnose the abnormity reason of the injection molding machine, the error caused by manual judgment is reduced, the fault processing efficiency is improved, and the maintenance cost is reduced; meanwhile, the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, and in particular to an abnormality self-diagnosis method for an injection molding machine. Background Art

[0002] During the specific production and use of the injection molding machine, the main controller of the injection molding machine outputs action instructions. The action instructions are usually output in two parts. One is the output power instruction, which sends the pressure and flow instructions to the driver. The driver drives the motor to control the oil pump to provide power for the corresponding action; the other is the output valve control instruction, which transmits the opening and closing signals of the valve corresponding to the action through the controller output point and the line to the corresponding solenoid valve.

[0003] Injection molding machines often have various abnormal actions during use, such as the controller outputs action instructions but the machine does not act, or the controller outputs action instruction A, but the machine performs action B. There are many reasons for these abnormalities, including whether the motor and oil pump are working normally, whether the corresponding action control valve is abnormal, whether the corresponding action control circuit is abnormal, etc., which causes the machine user or the equipment manufacturer's maintenance personnel to consider various factors when troubleshooting abnormal problems, which requires high professionalism of the maintenance personnel, and makes it difficult, time-consuming and labor-intensive to solve machine abnormalities. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an abnormality self-diagnosis method for an injection molding machine. Through the self-diagnosis of the injection molding machine, the specific cause of the abnormality of the injection molding machine is made obvious, thereby greatly reducing the difficulty of troubleshooting the abnormal problem and saving time for abnormality handling.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: An abnormality self-diagnosis method for an injection molding machine comprises the following steps: The controller of the injection molding machine outputs power instructions and valve control instructions; Acquire at least one performance parameter of the injection molding machine in real time through the controller; Determining whether the obtained performance parameters meet preset standards; Get a diagnosis.

[0006] The performance parameters include signal feedback from the position sensor corresponding to the action setting, and pressure and flow data feedback from the driver; The specific diagnosis is as follows: The position sensor has no signal feedback to the controller, indicating that the corresponding action is not executed. According to the pressure and flow data feedback of the driver, the following abnormal diagnosis is performed: Diagnosis 1: The controller did not obtain the pressure and flow data of the driver, and diagnosed it as abnormal power output, that is, the motor did not work normally; Diagnosis 2: The controller detected that the flow data of the driver was normal, but did not obtain the pressure data of the driver. The diagnosis was that the power output was normal, but the overflow valve on the oil circuit used to control the corresponding action was abnormal; Diagnosis 3: The controller detects that the pressure data of the driver is normal, but does not obtain the flow data of the driver. The diagnosis is that the power output is normal, but the solenoid control valve on the oil circuit used to control the corresponding action is abnormal.

[0007] The performance parameters also include output current data feedback of the output point corresponding to the valve control instruction; For the above diagnosis 3, further abnormal diagnosis is made as follows: Diagnosis 3-1: The controller detects that there is no output current at the corresponding output point, and diagnoses that the corresponding solenoid control valve is not powered, that is, the relevant control circuit is open; Diagnosis 3-2: The controller detects that the corresponding output point has output current, and the output current is too large, exceeding the preset standard value, and diagnoses that the relevant control circuit is short-circuited; Diagnosis 3-3: The controller detects that the corresponding output point has output current and the output current is normal. The diagnosis is that the corresponding solenoid control valve is stuck.

[0008] The performance parameters include signal feedback from a position sensor corresponding to the action setting and output current data feedback from an output point corresponding to the valve control instruction; Define the action corresponding to the action instruction output by the controller as the correct action, and other actions as wrong actions; When the controller detects that the position sensor corresponding to the correct action has no signal feedback, but the position sensor related to the wrong action has signal feedback to the controller, the following abnormal diagnosis is performed based on the data feedback of the output current of the output point corresponding to the correct action: Diagnosis 4: The controller detects that the output point of the correct action has normal output current, and diagnoses that the circuit connection corresponding to the correct action and the incorrect action is abnormal; Diagnosis 5: The controller detects that the output point of the correct action has no normal output current, and diagnoses that the relevant control circuit corresponding to the correct action is open circuit, and the solenoid control valve on the oil circuit corresponding to the incorrect action is stuck; When the controller detects that both the position sensor corresponding to the correct action and the position sensor related to the incorrect action have signal feedback, the controller performs the following abnormal diagnosis based on the data feedback of the output current of the output point corresponding to the correct action: Diagnosis 6: The controller detects that the output point of the correct action has output current, and the output current is too large and exceeds the preset standard, and diagnoses that the circuit connection corresponding to the correct action and the incorrect action is abnormal; Diagnosis 7: The controller detects that the output point of the correct action has normal output current and diagnoses that the solenoid control valve on the oil circuit corresponding to the incorrect action is stuck.

[0009] Compared with the prior art, the advantages of the present invention are: by acquiring the relevant performance parameters of the injection molding machine in real time, it is determined whether the corresponding performance parameters are within the preset standards, thereby realizing abnormal self-diagnosis of the injection molding machine, and the diagnosis results can be presented on the controller, helping the operator to quickly and accurately diagnose the abnormal cause of the injection molding machine, reduce the error of human judgment, improve the efficiency of fault handling, reduce maintenance costs, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a flowchart of abnormality diagnosis of the present invention. DETAILED DESCRIPTION

[0011] The present invention is further described in detail below with reference to the accompanying drawings.

[0012] An abnormality self-diagnosis method for an injection molding machine comprises the following steps: The controller of the injection molding machine outputs power instructions and valve control instructions; Acquire at least one performance parameter of the injection molding machine in real time through the controller; Determining whether the obtained performance parameters meet preset standards; Get a diagnosis.

[0013] In this specific embodiment, the performance parameters include signal feedback from a position sensor corresponding to the action setting, and pressure and flow data feedback from the actuator; The specific diagnosis is as follows: The position sensor has no signal feedback to the controller, indicating that the corresponding action is not executed. According to the pressure and flow data feedback of the driver, the following abnormal diagnosis is performed: Diagnosis 1: The controller did not obtain the pressure and flow data of the driver, and diagnosed it as abnormal power output, that is, the motor did not work normally; Diagnosis 2: The controller detected that the flow data of the driver was normal, but did not obtain the pressure data of the driver. The diagnosis was that the power output was normal, but the overflow valve on the oil circuit used to control the corresponding action was abnormal; Diagnosis 3: The controller detects that the pressure data of the driver is normal, but does not obtain the flow data of the driver. The diagnosis is that the power output is normal, but the solenoid control valve on the oil circuit used to control the corresponding action is abnormal.

[0014] Based on the above abnormal diagnosis, the performance parameters also include the output current data feedback of the output point corresponding to the valve control instruction; For the above diagnosis 3, further abnormal diagnosis is made as follows: Diagnosis 3-1: The controller detects that there is no output current at the corresponding output point, and diagnoses that the corresponding solenoid control valve is not powered, that is, the relevant control circuit is open; Diagnosis 3-2: The controller detects that the corresponding output point has output current, and the output current is too large, exceeding the preset standard value, and diagnoses that the relevant control circuit is short-circuited; Diagnosis 3-3: The controller detects that the corresponding output point has output current and the output current is normal. The diagnosis is that the corresponding solenoid control valve is stuck.

[0015] Based on the above abnormal diagnosis, the performance parameters include the signal feedback of the position sensor corresponding to the action setting and the output current data feedback of the output point position corresponding to the valve control instruction; Define the action corresponding to the action instruction output by the controller as the correct action, and other actions as wrong actions; When the controller detects that the position sensor corresponding to the correct action has no signal feedback, but the position sensor related to the wrong action has signal feedback to the controller, the following abnormal diagnosis is performed based on the data feedback of the output current of the output point corresponding to the correct action: Diagnosis 4: The controller detects that the output point of the correct action has normal output current, and diagnoses that the circuit connection corresponding to the correct action and the incorrect action is abnormal; Diagnosis 5: The controller detects that the output point of the correct action has no normal output current, and diagnoses that the relevant control circuit corresponding to the correct action is open circuit, and the solenoid control valve on the oil circuit corresponding to the incorrect action is stuck; When the controller detects that both the position sensor corresponding to the correct action and the position sensor related to the incorrect action have signal feedback, the controller performs the following abnormal diagnosis based on the data feedback of the output current of the output point corresponding to the correct action: Diagnosis 6: The controller detects that the output point of the correct action has output current, and the output current is too large and exceeds the preset standard, and diagnoses that the circuit connection corresponding to the correct action and the incorrect action is abnormal; Diagnosis 7: The controller detects that the output point of the correct action has normal output current and diagnoses that the solenoid control valve on the oil circuit corresponding to the incorrect action is stuck.

Claims

1. A method for self-diagnosis of abnormality of an injection molding machine, characterized in that The following steps are involved: The controller of the injection molding machine outputs power instructions and valve control instructions; Acquire at least one performance parameter of the injection molding machine in real time through the controller; Determining whether the obtained performance parameters meet preset standards; Get a diagnosis.

2. The abnormality self-diagnosis method of an injection molding machine as claimed in claim 1, characterized in that The performance parameters include signal feedback from the position sensor corresponding to the action setting, and pressure and flow data feedback from the driver; The specific diagnosis is as follows: The position sensor has no signal feedback to the controller, indicating that the corresponding action is not executed. According to the pressure and flow data feedback of the driver, the following abnormal diagnosis is performed: Diagnosis 1: The controller did not obtain the pressure and flow data of the driver, and diagnosed it as abnormal power output, that is, the motor did not work normally; Diagnosis 2: The controller detected that the flow data of the driver was normal, but did not obtain the pressure data of the driver. The diagnosis was that the power output was normal, but the overflow valve on the oil circuit used to control the corresponding action was abnormal; Diagnosis 3: The controller detects that the pressure data of the driver is normal, but does not obtain the flow data of the driver. The diagnosis is that the power output is normal, but the solenoid control valve on the oil circuit used to control the corresponding action is abnormal.

3. The abnormality self-diagnosis method of an injection molding machine as claimed in claim 2, characterized in that The performance parameters also include output current data feedback of the output point corresponding to the valve control instruction; For the above diagnosis 3, further abnormal diagnosis is made as follows: Diagnosis 3-1: The controller detects that there is no output current at the corresponding output point, and diagnoses that the corresponding solenoid control valve is not powered, that is, the relevant control circuit is open; Diagnosis 3-2: The controller detects that the corresponding output point has output current, and the output current is too large, exceeding the preset standard value, and diagnoses that the relevant control circuit is short-circuited; Diagnosis 3-3: The controller detects that the corresponding output point has output current and the output current is normal. The diagnosis is that the corresponding solenoid control valve is stuck.

4. The abnormality self-diagnosis method of an injection molding machine as claimed in claim 1, characterized in that The performance parameters include signal feedback from a position sensor corresponding to the action setting and output current data feedback from an output point corresponding to the valve control instruction; Define the action corresponding to the action instruction output by the controller as the correct action, and other actions as wrong actions; When the controller detects that the position sensor corresponding to the correct action has no signal feedback, but the position sensor related to the wrong action has signal feedback to the controller, the following abnormal diagnosis is performed based on the data feedback of the output current of the output point corresponding to the correct action: Diagnosis 4: The controller detects that the output point of the correct action has normal output current, and diagnoses that the circuit connection corresponding to the correct action and the incorrect action is abnormal; Diagnosis 5: The controller detects that the output point of the correct action has no normal output current, and diagnoses that the relevant control circuit corresponding to the correct action is open circuit, and the solenoid control valve on the oil circuit corresponding to the incorrect action is stuck; When the controller detects that both the position sensor corresponding to the correct action and the position sensor related to the incorrect action have signal feedback, the controller performs the following abnormal diagnosis based on the data feedback of the output current of the output point corresponding to the correct action: Diagnosis 6: The controller detects that the output point of the correct action has output current, and the output current is too large and exceeds the preset standard, and diagnoses that the circuit connection corresponding to the correct action and the incorrect action is abnormal; Diagnosis 7: The controller detects that the output point of the correct action has normal output current and diagnoses that the solenoid control valve on the oil circuit corresponding to the incorrect action is stuck.

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