CN118082142A

CN118082142A - Toggle rod type injection molding machine mold locking force detection method and system

Info

Publication number: CN118082142A
Application number: CN202410487371.0A
Authority: CN
Inventors: 陈致远; 许恒晖; 王嘉迪; 李冬阳; 凌锋; 徐杰; 吴昊; 童佰努; 王蔚; 张明; 周文杰
Original assignee: Haitian Plastics Machinery Group
Current assignee: Haitian Plastics Machinery Group
Priority date: 2024-04-23
Filing date: 2024-04-23
Publication date: 2024-05-28

Abstract

The application relates to a method and a system for detecting the mold locking force of a toggle rod type injection molding machine, which relate to the technical field of toggle rod type injection molding machines, and comprise the following steps: acquiring high-voltage mode locking action condition information; a mode locking flow interval value is called; analyzing and processing the mode locking flow interval value according to a preset system pressure peak value analysis method to form an effective system pressure peak value; taking the first effective system pressure peak value from small to large as a mode locking reference pressure value; acquiring a flow channel pressure loss meter based on the mode locking flow interval value, the effective system pressure peak value and the mode locking reference pressure value; and analyzing and processing the pressure loss meter of the flow channel and the pressure peak value of the effective system according to a preset actual mode locking force analysis method to form an actual mode locking force and outputting the actual mode locking force. The application can effectively improve the die locking force adjusting efficiency, improve the die locking force detecting precision, and has high automation degree and low cost.

Description

Toggle rod type injection molding machine mold locking force detection method and system

Technical Field

The application relates to the technical field of toggle rod type injection molding machines, in particular to a method and a system for detecting the mold locking force of a toggle rod type injection molding machine.

Background

Injection molding machines are the primary molding equipment for molding thermoplastic or thermosetting plastics into plastic articles of various shapes using plastic molding dies. The toggle type injection molding machine is a common injection molding machine type, and the opening and closing and locking of the mold are realized by driving a toggle connecting rod mechanism through a hydraulic system. In the high-pressure mold locking process, the smaller mold locking cylinder thrust can output larger mold locking force through the force amplification effect of the toggle rod mechanism, so that the mold locking mechanism is widely applied to various production industries.

In the related art, the mold locking force is an important parameter of the injection molding process, and unreasonable mold locking force setting can seriously affect the quality of plastic products and the service life of the mold. The existing mode locking force detection method establishes a mathematical model of the relation between the system pressure output by the hydraulic power unit and the actual mode locking force based on a large amount of test data, and directly converts the system pressure into the actual mode locking force through the mathematical model in actual application.

With respect to the related art in the above, the applicant found the following drawbacks: in the process of detecting the system pressure and converting the mold locking force through the power unit pressure sensor, the hydraulic oil and the wall surface of the flow channel have flow resistance, namely the hydraulic circuit has pressure loss, so that the detected mold locking force result has larger error.

Disclosure of Invention

In order to improve the detection precision of the mold locking force, the application provides a method and a system for detecting the mold locking force of a toggle rod type injection molding machine.

In a first aspect, the application provides a method for detecting a clamping force of a toggle injection molding machine, which adopts the following technical scheme:

a method for detecting the clamping force of a toggle rod type injection molding machine comprises the following steps:

Acquiring high-voltage mode locking action condition information;

the mode locking flow interval value is called based on the high-voltage mode locking action condition information;

Analyzing and processing the mode locking flow interval value according to a preset system pressure peak value analysis method to form an effective system pressure peak value;

sorting from small to large based on the effective system pressure peak value, taking the effective system pressure peak value with the first sorting as a mode locking reference pressure value, and taking a mode locking flow interval value corresponding to the mode locking reference pressure value as a mode locking reference flow value;

Acquiring a flow channel pressure loss meter based on the mode locking flow interval value, the effective system pressure peak value and the mode locking reference pressure value;

According to a preset actual mode locking force analysis method, analyzing and processing the pressure loss meter of the flow channel and the pressure peak value of the effective system to form actual mode locking force, and outputting the actual mode locking force.

Optionally, analyzing the mode locking flow interval value according to a preset system pressure peak value analysis method to form an effective system pressure peak value includes:

acquiring a system pressure acquisition value in real time based on the mode locking flow interval value;

analyzing and processing the system pressure acquisition value according to a preset pressure acquisition comprehensive analysis method to form system pressure acquisition comprehensive information;

Comparing the system pressure acquisition values in the system pressure acquisition comprehensive information with two adjacent systems in sequence, taking the system pressure acquisition values which are larger than the two adjacent systems as system pressure wave peaks, and taking the system pressure acquisition values which are smaller than the two adjacent systems as system pressure trough values;

Sorting from large to small based on the system pressure wave peak values, taking the system pressure wave peak value with the first sorting as a first system pressure wave peak value, and taking the system pressure wave peak value with the second sorting as a second system pressure wave peak value;

Judging whether a first crest value of the system pressure and a second crest value of the system pressure are continuous points or not;

If not, taking the first peak value of the system pressure as an effective system pressure peak value;

If yes, analyzing and calculating the average value of all the pressure wave peaks of the system and taking the average value as the average value of the pressure wave peaks of the system;

When the first system pressure peak value and the second system pressure peak value are larger than the average value of the system pressure peaks, respectively acquiring a time length value between two adjacent system pressure trough values of the first system pressure peak value and the second system pressure peak value, and taking the first system pressure peak value or the second system pressure peak value corresponding to the larger time length value as an effective system pressure peak value;

And when only the first peak value of the system pressure is larger than the average value of the peaks of the system pressure, taking the first peak value of the system pressure as an effective system pressure peak value.

Optionally, the analyzing the system pressure acquisition value according to the preset pressure acquisition comprehensive analysis method to form the system pressure acquisition comprehensive information includes:

the method comprises the steps of calling a high-voltage mode locking starting position point based on high-voltage mode locking action condition information;

acquiring a real-time position point of a movable template;

When the real-time position point of the movable mould plate is consistent with the high-pressure mould locking starting position point, starting to acquire a system pressure value and storing the system pressure value into a data temporary storage area, wherein the data temporary storage area is used for storing temporary data;

And carrying out linear normalization processing based on the acquired value of the data temporary storage area, and carrying out filtering processing by adopting a weighted moving average method to form the comprehensive information of system pressure acquisition.

Optionally, analyzing the flow pressure loss meter and the effective system pressure peak value according to the preset actual mode locking force analysis method to form an actual mode locking force includes:

adjusting the position of the movable template based on the mode locking reference flow value and acquiring an actual mode locking force detection value and an effective system pressure peak value;

establishing a mode locking force model based on the actual mode locking force detection value and an effective system pressure peak value;

And determining a mode locking pressure value based on the flow channel pressure loss meter and an effective system pressure peak value, and analyzing and calculating the actual mode locking force according to the mode locking pressure value and the mode locking force model.

Optionally, the method further comprises the step of outputting the actual mold clamping force, wherein the method specifically comprises the following steps:

acquiring a working oil temperature detection value and a current production cycle number value;

Outputting preset production pause control information when the working oil temperature detection value is not located in a preset test oil temperature reference interval or the current production cycle number value exceeds a production cycle number reference value;

judging whether the actual mold locking force is positioned in a preset mold locking force reference interval or not;

If yes, jumping and executing to acquire high-voltage mode locking action condition information;

If not, analyzing the actual mold locking force according to a preset moving mold plate position adjustment analysis method to form moving mold plate position adjustment information, and outputting the moving mold plate position adjustment information;

and skipping and re-executing to acquire the high-voltage mode locking action condition information.

Optionally, the analyzing the actual clamping force according to the preset moving die plate position adjustment analysis method to form moving die plate position adjustment information includes:

analyzing and calculating the difference between the actual mold locking force and a mold locking force reference interval and taking the difference as an actual mold locking force deviation value;

According to the corresponding relation between the actual mold locking force deviation value and the preset initial adjustment value of the movable mold plate position, analyzing and obtaining the initial adjustment value of the movable mold plate position corresponding to the actual mold locking force deviation value;

acquiring moving template distance detection information based on the moving template real-time position points;

According to a preset moving template distance error influence analysis method, analyzing and processing moving template distance detection information to form a moving template distance error influence value;

and analyzing and calculating a product value between the initial adjustment value of the moving template position and the influence value of the moving template distance error, taking the product value as a final adjustment value of the moving template position, and taking the final adjustment value of the moving template position as moving template position adjustment information.

Optionally, the analyzing the moving template distance detection information according to the preset moving template distance error influence analysis method to form a moving template distance error influence value includes:

The moving template side surface distance detection information and the moving template moving direction detection information are called based on the moving template distance detection information;

the movable template moving direction locking area detection value is called based on the movable template moving direction detection information;

Analyzing and calculating the difference between the movable template movable locking area detection value and a preset movable template movable locking area reference value, and taking the difference as a movable template movable locking area deviation value;

According to the corresponding relation between the movable template moving direction locking area deviation value and a preset movable template moving direction locking area deviation influence value, analyzing and obtaining the movable template moving direction locking area deviation influence value corresponding to the movable template moving direction locking area deviation value;

According to a preset moving template side surface distance influence analysis method, analyzing and processing moving template side surface distance detection information to form a moving template side surface distance influence value;

and analyzing and calculating the sum of the influence value of the side distance of the movable template and the influence value of the deviation of the movable locking area of the movable template, and taking the sum as the influence value of the distance error of the movable template.

Optionally, the analyzing the moving-template side-face distance detection information according to the preset moving-template side-face distance influence analysis method to form the moving-template side-face distance influence value includes:

The method comprises the steps of calling a moving template side surface distance detection value and a moving template angle detection value based on moving template side surface distance detection information;

Calling a moving template position distance reference value and a moving template position angle reference value based on the moving template real-time position point;

analyzing and calculating a difference value between a movable template position distance reference value and a movable template side surface distance detection value and taking the difference value as a movable template distance deviation value;

According to the corresponding relation between the movable template distance deviation value and a preset movable template distance deviation influence value, analyzing and obtaining a movable template distance deviation influence value corresponding to the movable template distance deviation value;

Analyzing and calculating a difference value between the angle detection value of the movable template and the angle reference value of the movable template position and taking the difference value as an angle deviation value of the movable template;

according to the corresponding relation between the angle deviation value of the movable template and the preset angle deviation influence value of the movable template, analyzing and obtaining the angle deviation influence value of the movable template corresponding to the angle deviation value of the movable template;

And analyzing and calculating a sum value between the moving template distance deviation influence value and the moving template angle deviation influence value, and taking the sum value as a moving template distance error influence value.

Optionally, the method further comprises the step of performing jump re-execution to acquire the high-voltage mode locking action condition information, and specifically comprises the following steps:

judging whether an effective system pressure peak value is positioned in a preset system pressure reference interval;

If yes, continuing to analyze and acquire the actual mold locking force;

if not, jumping to execute the analysis method according to the preset movable template position adjustment so as to analyze and process the actual clamping force to form movable template position adjustment information.

In a second aspect, the application provides a toggle injection molding machine mold locking force detection system, which adopts the following technical scheme:

a toggle-type injection molding machine mold locking force detection system, comprising:

The acquisition module is used for acquiring the high-voltage mode locking action condition information;

the characteristic recognition module is used for receiving the high-voltage mode locking action condition information and outputting an effective system pressure peak value;

the logic operation module is used for receiving the pressure peak value of the effective system to obtain a mode locking reference pressure value, acquiring a flow channel pressure loss meter and analyzing to form actual mode locking force;

And the digital display terminal is used for inputting parameter conditions and displaying actual mode locking force output.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The mode locking pressure value is analyzed and calculated through the flow channel pressure loss corresponding to the effective system pressure peak value and the mode locking flow interval value, and the actual mode locking force is output through the mode locking force model, so that the accuracy of mode locking detection is ensured, a pressure sensor is not required to be arranged on a mode locking oil cylinder to detect the mode locking pressure, the detection cost is greatly reduced, and the mode locking force model can be shared on injection molding machines with the same specification and model and has strong universality;

2. Analyzing and processing a system pressure acquisition value obtained in real time to form system pressure acquisition comprehensive information, processing the system pressure acquisition comprehensive information to obtain a first system pressure peak value and a second system pressure peak value, and analyzing an effective system pressure peak value according to whether the first system pressure peak value and the second system pressure peak value are continuous points or not and whether the first system pressure peak value and the second system pressure peak value are larger than the average value of the system pressure peak value or not, so that the accuracy of detection of the mode locking force is improved;

3. the automatic calibration process does not need human intervention, calibration can be directly finished according to preset parameters, and operation is simplified.

Drawings

Fig. 1 is a flowchart of a method for detecting a clamping force of a toggle injection molding machine according to an embodiment of the present application.

FIG. 2 is a graph of an example of effective system pressure peak selection in accordance with an embodiment of the present application.

FIG. 3 is a graph comparing system pressure acquisition integrated information according to an embodiment of the present application.

FIG. 4 is a flow chart of a method of an embodiment of the present application following the step of outputting the actual clamping force.

Fig. 5 is a flowchart of a method of an embodiment of the present application after skipping to re-execute the steps of acquiring the high voltage mode locking action condition information.

Fig. 6 is a system diagram of a toggle injection molding machine mold locking force detection according to an embodiment of the present application.

Reference numerals illustrate: 1. an acquisition module; 2. a feature recognition module; 3. a logic operation module; 4. and a digital display terminal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings 1 to 6 and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The embodiment of the application discloses a method for detecting the mold locking force of a toggle rod type injection molding machine.

Referring to fig. 1, a method for detecting a clamping force of a toggle injection molding machine includes:

Step S100: and obtaining high-voltage mode locking action condition information.

The high-pressure mode locking operation condition information is condition information for controlling the brake template to move when high-pressure mode locking is performed, and comprises a mode locking flow preset command value, a movable template initial position point and a high-pressure mode locking starting position point. The mode locking flow preset command value is command information for indicating to control the flow of the mode locking oil cylinder, and is obtained after being pre-input by an operator. The movable template initial position point is used for indicating position information before the movable template acts, and the movable template initial position point is detected and obtained through a position detection device preset on the injection molding machine. The high-pressure die locking starting position point is used for indicating the position point of the movable die plate when the high-pressure die locking is started, and the high-pressure die locking starting position point is detected and acquired through a position detection device preset on the injection molding machine.

Step S200: and calling a mode locking flow interval value based on the high-voltage mode locking action condition information.

The mode locking flow interval value is a set of preset command values of mode locking flow, and the mode locking flow interval value refers to a specific value of the mode locking flow interval. For example, the mode locking flow interval value may be a specific value of the mode locking flow interval corresponding to the mode locking flow preset command value set according to 5%,10%,15%,20% and the like of the rated mode locking flow in sequence.

Step S300: and analyzing and processing the mode locking flow interval value according to a preset system pressure peak value analysis method to form an effective system pressure peak value.

The system pressure is used for indicating the hydraulic system pressure output by the hydraulic power unit when the high-pressure mode locking action is performed, the effective system pressure peak value is used for indicating the maximum value meeting the requirement in the system pressure curve, and the system pressure peak value analysis method is used for analyzing the effective system pressure peak value. And the mode locking flow interval value is analyzed and processed through a system pressure peak value analysis method so as to form an effective system pressure peak value, and the subsequent use is convenient.

Step S400: and sorting from small to large based on the effective system pressure peak value, taking the effective system pressure peak value with the first sorting as a mode locking reference pressure value, and taking a mode locking flow interval value corresponding to the mode locking reference pressure value as a mode locking reference flow value.

The mode locking reference pressure value refers to a reference value for indicating the system pressure under the condition that the same actual mode locking force is currently output, and the mode locking reference flow value refers to a flow instruction value corresponding to the mode locking reference pressure value.

Step S500: and acquiring a flow channel pressure loss meter based on the mode locking flow interval value, the effective system pressure peak value and the mode locking reference pressure value.

The mode locking pressure value is used for indicating the pressure peak value of an oil inlet of the mode locking cylinder in the high-pressure mode locking action process, the flow channel pressure loss is the difference value between the mode locking pressure and the pressure peak value of an effective system in the high-pressure mode locking action process, and the flow channel pressure loss meter is a mapping relation table of the mode locking flow and the flow channel pressure loss. The flow channel pressure loss is obtained by analyzing and calculating the pressure peak value of the effective system and the mode locking reference pressure value, and the flow channel pressure loss is related to the mode locking flow interval value to obtain a flow channel pressure loss meter, and the mode locking pressure value is obtained by analyzing and calculating the difference value between the flow channel pressure loss corresponding to the flow channel pressure loss meter and the effective system pressure peak value, so that the follow-up use is convenient.

Step S600: according to a preset actual mode locking force analysis method, analyzing and processing the pressure loss meter of the flow channel and the pressure peak value of the effective system to form actual mode locking force, and outputting the actual mode locking force.

The actual mold locking force refers to an actual maximum mold locking force value when high-pressure mold locking is carried out, the actual mold locking force analysis method refers to an analysis method for analyzing the actual mold locking force, and the actual mold locking force analysis method is obtained by inquiring a database storing the actual mold locking force analysis method.

The flow channel pressure loss meter is analyzed and processed through the actual mold locking force analysis method, so that the actual mold locking force is formed, the actual mold locking force is output, namely, the actual mold locking force is analyzed through an effective system pressure peak value and flow channel pressure loss, the obtained actual mold locking force is not easily influenced by the flow channel pressure loss, the mold locking force detection error is further reduced, the mold locking force adjusting efficiency is effectively improved, the automation degree is high, the existing sensor on the injection molding machine is only required to be adopted for detection, additional installation of the sensor is not required, and the cost is low.

In step S300 shown in fig. 1, in order to further ensure the rationality of the effective system pressure peak, further individual analysis calculation of the effective system pressure peak is required, specifically, the following steps are described in detail.

Analyzing the mode locking flow interval value according to a preset system pressure peak value analysis method to form an effective system pressure peak value, wherein the method comprises the following steps of:

step S310: and acquiring a system pressure acquisition value in real time based on the mode locking flow interval value.

The system pressure acquisition value is acquired after detection through a pressure detection device preset on the injection molding machine, and the pressure detection device is used for detecting output pressure of a servo motor pump group of the injection molding machine.

Step S320: and analyzing and processing the system pressure acquisition value according to a preset pressure acquisition comprehensive analysis method to form system pressure acquisition comprehensive information.

The system pressure acquisition comprehensive information refers to comprehensive information obtained by preprocessing the acquired system pressure, the pressure acquisition comprehensive analysis method refers to an analysis method for analyzing the system pressure acquisition comprehensive information, and the pressure acquisition comprehensive analysis method is obtained by inquiring a database storing the pressure acquisition comprehensive analysis method.

And the system pressure acquisition value is analyzed and processed by a pressure acquisition comprehensive analysis method, so that comprehensive system pressure acquisition information is formed, and the subsequent use is convenient.

Step S330: and comparing the system pressure acquisition values in the system pressure acquisition comprehensive information with two adjacent systems in sequence, taking the system pressure acquisition values which are larger than the two adjacent systems as system pressure wave peaks, and taking the system pressure acquisition values which are smaller than the two adjacent systems as system pressure trough values.

The system pressure wave peak value is used for indicating a pressure value which is larger than the system pressure at the adjacent moment, and the system pressure trough value is smaller than the pressure value of the system pressure at the adjacent moment. The system pressure acquisition values in the system pressure acquisition comprehensive information are compared with the adjacent two systems in sequence, the system pressure acquisition values which are larger than the adjacent two systems are used as system pressure wave peaks, and the system pressure acquisition values which are smaller than the adjacent two systems are used as system pressure trough values, so that the subsequent use is convenient.

Step S340: and sorting from large to small based on the system pressure wave peak values, taking the system pressure wave peak value with the first sorting as a first system pressure wave peak value, and taking the system pressure wave peak value with the second sorting as a second system pressure wave peak value.

The system pressure first peak value is a pressure value for indicating the maximum system pressure, and the system pressure second peak value is a pressure value for indicating the second maximum system pressure. The system pressure wave peaks are ordered from large to small, the system pressure wave peak value with the first ordering is used as the first system pressure wave peak value, and the system pressure wave peak value with the second ordering is used as the second system pressure wave peak value, so that the subsequent use is convenient.

Step S350: judging whether the first peak value of the system pressure and the second peak value of the system pressure are continuous points or not. If not, executing step S360; if yes, step S370 is performed.

And judging whether the first peak value of the system pressure is directly used as an effective system pressure peak value or not by judging whether the first peak value of the system pressure and the second peak value of the system pressure are continuous points or not.

Step S360: the first peak value of the system pressure is taken as an effective system pressure peak value.

When the first peak value of the system pressure and the second peak value of the system pressure are discontinuous points, the first peak value of the system pressure can be directly used as an effective system pressure peak value.

Step S370: the analysis calculates the average value of all pressure wave peaks of the system and takes the average value as the peak value of the pressure wave of the system.

The system pressure peak mean value is used for indicating the mean value of all system pressure wave peaks, and when the first system pressure peak value and the second system pressure peak value are continuous points, the first system pressure peak value cannot be directly used as an effective system pressure peak value at the moment, so that the system pressure peak mean value is analyzed and calculated, and the subsequent use is convenient.

Step S380: when the first system pressure peak value and the second system pressure peak value are larger than the average value of the system pressure peaks, respectively obtaining time length values between two adjacent system pressure trough values of the first system pressure peak value and the second system pressure peak value, and taking the first system pressure peak value or the second system pressure peak value corresponding to the larger time length values as an effective system pressure peak value.

When the first system pressure peak value and the second system pressure peak value are both larger than the average value of the system pressure peaks, the first system pressure peak value and the second system pressure peak value can be used as effective system pressure peak values, so that time length values between two adjacent system pressure trough values of the first system pressure peak value and the second system pressure peak value are analyzed and obtained, the first system pressure peak value or the second system pressure peak value corresponding to the larger time length values are used as effective system pressure peak values, the effective system pressure peak values are determined through waveform characteristics, the accuracy of the obtained effective system pressure peak values is improved, and the qualification rate of plastic products is further improved.

Step S390: and when only the first peak value of the system pressure is larger than the average value of the peaks of the system pressure, taking the first peak value of the system pressure as an effective system pressure peak value.

Referring to fig. 2, for example, if the peak values of the acquired system pressure waves are K1, K2, K3, K4, K5, K6, K7, respectively, the valley values of the system pressure are K1, K2, K3, K4, K5, K6, K7, respectively. When K3 and K4 are greater than the mean value, and the length of time between K3 and K4 corresponding to K3 is greater than the length of time between K4 and K5 corresponding to K4, K3 is selected as the effective system pressure peak.

In step S320, in order to further ensure the rationality of the system pressure acquisition integrated information, further individual analysis calculation of the system pressure acquisition integrated information is required, specifically, the following steps are described in detail.

The method for analyzing and processing the system pressure acquisition value according to the preset pressure acquisition comprehensive analysis method to form the system pressure acquisition comprehensive information comprises the following steps:

step S321: and calling a high-voltage mode locking starting position point based on the high-voltage mode locking action condition information.

The high-voltage mode locking starting position point is adjusted through the high-voltage mode locking action condition information, so that the subsequent use is convenient.

Step S322: and acquiring a real-time position point of the movable template.

The real-time position point of the movable template is used for indicating the position point of the movable template in real time, and the real-time position point of the movable template is obtained after detection through a position detection device preset on the injection molding machine.

Step S323: when the real-time position point of the movable mould plate is consistent with the high-pressure mould locking starting position point, the system pressure value is started to be collected and stored in the data temporary storage area.

When the real-time position point of the movable mould plate is consistent with the high-pressure mould locking starting position point, the high-pressure mould locking is started, so that the system pressure value is started to be acquired and stored in a data temporary storage area, and the data temporary storage area is used for storing temporary data, so that the subsequent use is convenient.

Step S324: and carrying out linear normalization processing based on the acquired value of the data temporary storage area, and carrying out filtering processing by adopting a weighted moving average method to form the comprehensive information of system pressure acquisition.

The linear normalization process is used for linearly changing the acquired system pressure value and the maximum value and the minimum value thereof, so as to convert the acquired system pressure value into an array of [0,1] ranges. The specific formula is as follows: . Wherein P (t) is an initial system pressure value acquired in the t moment,/> And (2) for the system pressure value obtained after conversion in the time t, min [ P (t) ] is the minimum value in the acquired system pressure value, and max [ P (t) ] is the maximum value in the acquired system pressure value.

The weighted moving average method is a method of giving different weights to the predicted values according to the influence degree of the data at different times in the same moving segment, and then performing average movement to predict future values. The system pressure value after the linear normalization processing is subjected to filtering processing by adopting a weighted moving average method to form system pressure acquisition comprehensive information, so that abnormal values in the system pressure value after the linear normalization processing are removed, the obtained data are further optimized, and the accuracy of the acquired system pressure acquisition comprehensive information is improved.

Referring to fig. 3, the upper half of fig. 3 is an unprocessed data image, the lower half of fig. 3 is a data comparison image between processed and unprocessed, red lines are unprocessed data, and black lines are processed data. The system pressure acquisition value is processed to form system pressure acquisition comprehensive information, so that the accuracy of the acquired system pressure acquisition comprehensive information is improved.

In step S600 shown in fig. 1, in order to further secure the rationality of the actual clamping force, further individual analysis calculation of the actual clamping force is required, specifically, the following steps are described in detail.

According to the preset actual mode locking force analysis method, the analysis processing of the pressure peak value of the flow pressure loss meter and the effective system to form the actual mode locking force comprises the following steps:

step S610: and adjusting the position of the movable template based on the mode locking reference flow value, and acquiring an actual mode locking force detection value and an effective system pressure peak value.

The actual mold locking force detection value is the maximum mold locking force value acquired after the position of the movable mold plate is adjusted, and the actual mold locking force detection value is detected and acquired through a preset mold locking force detector.

Step S620: and establishing a mode locking force model based on the actual mode locking force detection value and the effective system pressure peak value.

The mode locking force model is used for indicating the relation between an effective system pressure peak value and a mode locking force detection value under the mode locking reference flow, and a mode locking force model of the actual mode locking force and the effective system pressure peak value is established by adjusting the position of the movable template for multiple times and collecting multiple groups of actual mode locking force detection values and the effective system pressure peak value, so that the follow-up use is convenient.

Step S630: and determining a mode locking pressure value based on the flow channel pressure loss meter and an effective system pressure peak value, and analyzing and calculating the actual mode locking force according to the mode locking pressure value and the mode locking force model.

And analyzing and acquiring a flow channel pressure loss value corresponding to the mode locking flow preset command value based on the mode locking flow interval value and the flow channel pressure loss meter. And analyzing and calculating the mode locking flow interval value and the mode locking pressure loss interval value by a channel pressure loss value corresponding to the mode locking flow preset command through a preset linear interpolation formula. The specific formula of the linear interpolation method is as follows: . Wherein/> Presetting a flow channel pressure loss value corresponding to a command for mode locking flow rate,/>Mode locking pressure loss interval value corresponding to nth mode locking flow interval value,/>Mode locking pressure loss interval value corresponding to the nth-1 mode locking flow interval value,/>For the nth mode-locked flow interval value,/>And the value is the n-1 mode locking flow interval value, and Q is the mode locking flow interval value. The mode locking flow interval value and the mode locking pressure loss interval value are obtained by inquiring a database storing the corresponding relation between the mode locking flow interval value and the mode locking pressure loss interval value. The pressure of the oil inlet of the mold locking oil cylinder is analyzed and calculated through the pressure loss value of the runner and the pressure peak value of the effective system, namely the pressure value of the mold locking oil cylinder, and the pressure value of the mold locking is substituted into the mold locking model, so that the actual mold locking force is obtained, and the accuracy of the obtained actual mold locking force is improved.

After step S600 shown in fig. 1, in order to further ensure accuracy of the detection result of the method, the production state and the operation condition of the injection molding machine need to be monitored in real time, which is specifically described in detail through steps shown in fig. 4.

Referring to fig. 4, the steps after outputting the actual mold locking force, that is, the steps after the method is applied to the actual production of the injection molding machine, include the following steps:

Step S710: and acquiring a working oil temperature detection value and a current production cycle number value.

The working oil temperature detection value is used for indicating the hydraulic oil temperature of the injection molding machine, and is obtained through detection of the injection molding machine oil temperature detection device. The current production cycle number value refers to the number of production plans which are finished in a cumulative way at the current time, namely the total number of times of opening and closing cycle actions at the production stage, and is obtained by detecting the production counting device of the injection molding machine.

Step S720: and outputting preset production pause control information when the working oil temperature detection value is not located in a preset test oil temperature reference interval or the current production cycle number value exceeds the production cycle number reference value.

The test oil temperature reference interval is used for indicating a reference interval where the oil temperature is located during test, and is obtained by inquiring from a database storing the test oil temperature reference interval, or by manual input. The production cycle number reference value refers to an early warning value of the total cycle number of the mold opening and closing in the production stage, and is obtained by inquiring from a database storing the production cycle number reference value, or can be obtained by manual input. The production suspension control information refers to control information for suspending the current production job, and is obtained by querying from a database in which the production suspension control information is stored.

When the working oil temperature detection value is not located in a preset test oil temperature reference interval or the current production cycle number value exceeds the production cycle number reference value, the flow pressure loss meter needs to be calibrated again, and therefore preset production pause control information is output.

Step S730: and judging whether the actual mold locking force is positioned in a preset mold locking force reference interval. If yes, go to step S740; if not, step S750 is performed.

The mode locking force reference interval is used for indicating a reference interval in which the mode locking force needs to be in the working process, and the mode locking force reference interval is inquired and obtained from a database storing the mode locking force reference interval.

And judging whether the actual mold locking force is in a preset mold locking force reference interval or not, so as to judge whether the movable mold plate needs to be calibrated or not.

Step S740: the jump proceeds to steps S100 to S500.

When the actual mold locking force is within the preset mold locking force reference interval, it is indicated that the movable mold plate does not need to be calibrated at this time, so step S100 to step S500 are skipped.

Step S750: and analyzing the actual mold locking force according to a preset moving mold plate position adjustment analysis method to form moving mold plate position adjustment information, and outputting the moving mold plate position adjustment information.

The movable template position adjustment information refers to control information for adjusting the position of the movable template, the movable template position adjustment analysis method refers to an analysis method for analyzing the movable template position adjustment information, and the movable template position adjustment analysis method is obtained by inquiring a database storing the movable template position adjustment analysis method.

When the actual mold locking force is not located in the preset mold locking force reference interval, the fact that the movable mold plate needs to be calibrated at the moment is indicated, so that the actual mold locking force is analyzed and processed through a movable mold plate position adjustment analysis method to form movable mold plate position adjustment information, and the movable mold plate position adjustment information is output to calibrate the movable mold plate.

Step S760: the jump re-executes step S100.

Step S100 is executed again through jumping, so that the actual mold locking force is analyzed and obtained again, and the accuracy of the obtained actual mold locking force is improved.

In step S750 shown in fig. 4, in order to further secure the rationality of the movable platen position adjustment information, further individual analysis calculation of the movable platen position adjustment information is required, and specifically, the following steps are described in detail.

The method for analyzing the actual clamping force according to the preset moving die plate position adjustment analysis method to form moving die plate position adjustment information comprises the following steps:

Step S751: and analyzing and calculating the difference between the actual mold locking force and the reference interval of the mold locking force and taking the difference as an actual mold locking force deviation value.

The actual mold locking force deviation value is used for indicating the deviation of the actual mold locking force, and the deviation value between the actual mold locking force and the mold locking force reference interval is analyzed and calculated and used as the actual mold locking force deviation value, so that the subsequent use is convenient.

Step S752: and analyzing and obtaining the initial adjustment value of the movable die plate position corresponding to the actual die locking force deviation value according to the corresponding relation between the actual die locking force deviation value and the initial adjustment value of the preset movable die plate position.

The initial adjustment value of the position of the movable template refers to an initial adjustment value for adjusting the position of the movable template according to the mold locking force, and the initial adjustment value of the position of the movable template is obtained by inquiring a database storing the initial adjustment value of the position of the movable template. And the initial adjustment value of the movable template position is obtained through analysis of the actual clamping force deviation value, so that the subsequent use is convenient.

Step S753: and acquiring the distance detection information of the movable template based on the real-time position point of the movable template.

The moving template distance detection information is detection information for detecting the distance of the moving template, and the moving template distance detection information is obtained by inquiring a database storing the moving template distance detection information. In this embodiment, the real-time position point of the moving template is detected and obtained by an apparatus for detecting a distance, such as infrared, laser, or the like.

Step S754: according to a preset moving template distance error influence analysis method, analyzing and processing the moving template distance detection information to form a moving template distance error influence value.

The moving template distance error influence value refers to an influence degree value for influencing the distance error of the moving template, the moving template distance error influence analysis method refers to an analysis method for analyzing the moving template distance error influence value, and the moving template distance error influence analysis method is obtained by inquiring a database storing the moving template distance error influence analysis method.

And analyzing and processing the moving template distance detection information by using a moving template distance error influence analysis method, so that a moving template distance error influence value is formed, and the subsequent use is convenient.

Step S755: and analyzing and calculating a product value between the initial adjustment value of the moving template position and the influence value of the moving template distance error, taking the product value as a final adjustment value of the moving template position, and taking the final adjustment value of the moving template position as moving template position adjustment information.

The final adjustment value of the moving template position is a final adjustment value for indicating adjustment of the moving template position, and the product value between the initial adjustment value of the moving template position and the error influence value of the moving template distance is analyzed and calculated to be used as the final adjustment value of the moving template position, and the final adjustment value of the moving template position is used as moving template position adjustment information, so that the accuracy of obtaining the obtained moving template position adjustment information is improved.

In step S754, in order to further secure the rationality of the movable die plate distance error influence value, further individual analysis calculation of the movable die plate distance error influence value is required, specifically, the following steps are described in detail.

The method for analyzing the moving template distance detection information according to the preset moving template distance error influence analysis method to form a moving template distance error influence value comprises the following steps:

step S7541: and calling the side surface distance detection information of the movable template and the moving direction detection information of the movable template based on the moving template distance detection information.

The movable template side surface distance detection information is detection information for detecting the distance of the peripheral side surfaces of the movable template, and the movable template side surface distance detection information is obtained by inquiring a database storing the movable template side surface distance detection information. The moving direction detection information of the moving template is detection information for detecting the distance of the moving template in the moving direction, and the moving direction detection information of the moving template is obtained by inquiring a database storing the moving direction detection information of the moving template.

And the side surface distance detection information of the movable template and the moving direction detection information of the movable template are acquired through the movable template distance detection information, so that the subsequent use is convenient.

Step S7542: and calling a movable template movable locking area detection value based on the movable template movable locking detection information.

The movable template moving direction locking area detection value is a detection value used for indicating that the corresponding locking area of the movable template can be detected by irradiation of infrared rays, laser and the like when the movable template moves in the moving direction, and the movable template moving direction locking area detection value is obtained by inquiring a database storing the movable template moving direction locking area detection value.

The movable template moving direction locking area detection value is adjusted through the movable template moving direction detection information, so that the movable template moving direction locking area detection value is convenient to use subsequently.

Step S7543: and analyzing and calculating the difference between the movable template movable locking area detection value and a preset movable template movable locking area reference value, and taking the difference as a movable template movable locking area deviation value.

The movable template moving direction locking area reference value is a reference value for indicating the corresponding locking area of the movable template during locking, and is obtained by inquiring a database storing the movable template moving direction locking area reference value.

The difference value between the movable template movable locking area detection value and the preset movable template movable locking area reference value is analyzed and calculated and used as the movable template movable locking area deviation value, so that the follow-up use is convenient.

Step S7544: and analyzing and obtaining the moving-direction locking area deviation influence value of the moving-direction locking area corresponding to the moving-direction locking area deviation value of the moving-direction template according to the corresponding relation between the moving-direction locking area deviation value of the moving-direction template and the preset moving-direction locking area deviation influence value of the moving-direction locking area of the moving-direction template.

The movable template moving direction locking area deviation influence value is an influence degree value used for indicating that the corresponding locking area of the movable template in the moving direction has deviation to influence, and the movable template moving direction locking area deviation influence value is obtained by inquiring a database storing the movable template moving direction locking area deviation influence value.

And the moving direction locking area deviation influence value of the moving template is obtained through analysis of the moving direction locking area deviation value of the moving template, so that the follow-up use is convenient.

Step S7545: according to a preset moving template side surface distance influence analysis method, analyzing and processing moving template side surface distance detection information to form a moving template side surface distance influence value.

The movable template side surface distance influence value is an influence degree value for indicating influence of the movable template side surface distance, the movable template side surface distance influence analysis method is an analysis method for analyzing the movable template side surface distance influence value, and the movable template side surface distance influence analysis method is obtained by inquiring a database storing the movable template side surface distance influence analysis method.

And analyzing and processing the side distance detection information of the movable template by using a side distance influence analysis method of the movable template, so that a side distance influence value of the movable template is formed, and the subsequent use is convenient.

Step S7546: and analyzing and calculating the sum of the influence value of the side distance of the movable template and the influence value of the deviation of the movable locking area of the movable template, and taking the sum as the influence value of the distance error of the movable template.

The sum value between the side surface distance influence value of the movable template and the movable locking area deviation influence value of the movable template is analyzed and calculated and used as a movable template distance error influence value, so that the accuracy of the obtained movable template distance error influence value is improved.

In step S7545, in order to further secure the rationality of the movable die plate side surface distance influence value, further individual analysis and calculation of the movable die plate side surface distance influence value are required, and specifically, the following steps are described in detail.

The method for analyzing the side distance detection information of the movable template according to the preset side distance influence analysis method of the movable template to form a side distance influence value of the movable template comprises the following steps:

step S75451: and calling a movable template side surface distance detection value and a movable template angle detection value based on the movable template side surface distance detection information.

The moving template side surface distance detection value is a detection value for detecting each side surface distance of the moving template, and the moving template side surface distance detection value is obtained by inquiring a database storing the moving template side surface distance detection value. The movable template angle detection value is a detection value for indicating detection of each side angle of the movable template, and the movable template angle detection value is obtained by inquiring from a database storing the movable template angle detection values. And the detection value of the side surface distance of the movable template and the detection value of the angle of the movable template are obtained through the detection information of the side surface distance of the movable template, so that the subsequent use is convenient.

Step S75452: and calling the moving template position distance reference value and the moving template position angle reference value based on the moving template real-time position point.

The moving template position distance reference value refers to a distance reference value corresponding to the current position of the moving template, and the moving template position distance reference value is obtained by inquiring a database storing the moving template position distance reference value. The movable template position angle reference value is an angle reference value corresponding to the current position of the movable template, and the movable template position angle reference value is obtained by inquiring a database storing the movable template position angle reference value. And the movable template position distance reference value and the movable template position angle reference value are adjusted through the movable template real-time position points, so that the subsequent use is convenient.

Step S75453: and analyzing and calculating a difference value between the movable template position distance reference value and the movable template side surface distance detection value to serve as a movable template distance deviation value.

The movable template distance deviation value is used for indicating deviation of the movable template distance, and the difference between the movable template position distance reference value and the movable template side surface distance detection value is analyzed and calculated and used as the movable template distance deviation value, so that the movable template distance deviation value is convenient to use subsequently.

Step S75454: and analyzing and acquiring the moving template distance deviation influence value corresponding to the moving template distance deviation value according to the corresponding relation between the moving template distance deviation value and the preset moving template distance deviation influence value.

The moving template distance deviation influence value is an influence degree value for indicating that the moving template distance has deviation to influence, and the moving template distance deviation influence value is obtained by inquiring a database storing the moving template distance deviation influence value. And the influence value of the distance deviation of the movable template is obtained through analysis of the distance deviation value of the movable template, so that the subsequent use is convenient.

Step S75455: and analyzing and calculating a difference value between the angle detection value of the movable template and the angle reference value of the movable template position and taking the difference value as the angle deviation value of the movable template.

The movable template angle deviation value is used for indicating deviation of the movable template angle, and the difference between the movable template angle detection value and the movable template position angle reference value is analyzed and calculated and used as the movable template angle deviation value, so that the subsequent use is convenient.

Step S75456: and analyzing and acquiring the movable template angle deviation influence value corresponding to the movable template angle deviation value according to the corresponding relation between the movable template angle deviation value and the preset movable template angle deviation influence value.

The movable template angle deviation influence value is an influence degree value for indicating that the movable template angle deviation exists to influence, and the movable template angle deviation influence value is obtained by inquiring a database storing the movable template angle deviation influence value. And the angle deviation influence value of the movable template is obtained through analysis of the angle deviation value of the movable template, so that the subsequent use is convenient.

Step S75457: and analyzing and calculating a sum value between the moving template distance deviation influence value and the moving template angle deviation influence value, and taking the sum value as a moving template distance error influence value.

The sum value between the moving template distance deviation influence value and the moving template angle deviation influence value is analyzed and calculated and used as a moving template distance error influence value, so that the accuracy of the acquired moving template distance error influence value is improved.

In step S760 shown in fig. 4, in order to further secure the rationality of the movable platen position adjustment information, further individual analysis calculation of the movable platen position adjustment information is required, and specifically, the steps shown in fig. 5 will be described in detail.

Referring to fig. 5, the steps after the jump re-execution to acquire the high-voltage mode locking operation condition information include the steps of:

step S771: and judging whether the effective system pressure peak value is positioned in a preset system pressure reference interval. If yes, go to step S772; if not, step S773 is performed.

The system pressure reference interval is a reference interval used for indicating the tolerance of the system pressure, and the system pressure reference interval is obtained by inquiring a database storing the system pressure reference interval.

And judging whether the effective system pressure peak value is positioned in a preset system pressure reference interval or not, so as to judge whether the movable template needs to be calibrated or not.

Step S772: and continuing to analyze and acquire the actual mold locking force.

When the effective system pressure peak value is located in a preset system pressure reference interval, the movable template is not required to be calibrated at the moment, so that the actual mode locking force is continuously analyzed and obtained.

Step S773: the jump proceeds to step S750.

When the effective system pressure peak value is not located in the preset system pressure reference interval, it is indicated that the movable template needs to be calibrated at this time, so step S750 is performed in a jump mode, so that the mold locking force is detected in real time and calibrated in time in the working process, thereby improving the quality of the processed product and prolonging the service lives of the movable template and the mold.

Referring to fig. 6, based on the same inventive concept, an embodiment of the present invention provides a toggle injection molding machine mold locking force detection system, including:

The acquisition module 1 is used for acquiring high-voltage mode locking action condition information;

the characteristic recognition module 2 is used for receiving the high-voltage mode locking action condition information and outputting an effective system pressure peak value;

The logic operation module 3 is used for receiving the pressure peak value of the effective system to obtain a mode locking reference pressure value, acquiring a flow channel pressure loss meter and analyzing to form actual mode locking force;

And the digital display terminal 4 is used for inputting parameter conditions and displaying actual mode locking force output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.

The foregoing description of the preferred embodiments of the application is not intended to limit the scope of the application in any way, including the abstract and drawings, in which case any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

Claims

1. The method for detecting the clamping force of the toggle rod type injection molding machine is characterized by comprising the following steps of:

Acquiring high-voltage mode locking action condition information;

2. The method of claim 1, wherein analyzing the mode locking flow interval value according to a preset system pressure peak analysis method to form an effective system pressure peak value comprises:

3. The method of claim 2, wherein analyzing the system pressure collection value according to a preset pressure collection analysis-by-synthesis method to form system pressure collection information comprises:

acquiring a real-time position point of a movable template;

4. The method of claim 1, wherein analyzing the flow pressure loss meter and the peak effective system pressure to form the actual mold clamping force according to the predetermined actual mold clamping force analysis method comprises:

5. The method for detecting the mold clamping force of the toggle type injection molding machine according to claim 1, further comprising the step of, after outputting the actual mold clamping force, concretely comprising the steps of:

6. The method of claim 5, wherein the analyzing the actual mold clamping force according to the preset moving platen position adjustment analysis method to form moving platen position adjustment information comprises:

7. The method of claim 6, wherein analyzing the moving platen distance detection information to form a moving platen distance error impact value according to a predetermined moving platen distance error impact analysis method comprises:

8. The method of claim 7, wherein analyzing the moving platen side distance detection information to form the moving platen side distance influence value according to a preset moving platen side distance influence analysis method comprises:

9. The method for detecting the clamping force of the toggle type injection molding machine according to claim 5, further comprising the step of, after the step of skipping to re-execute the acquisition of the high-pressure clamping action condition information, specifically:

If yes, continuing to analyze and acquire the actual mold locking force;

10. A toggle-type injection molding machine mold locking force detection system, comprising:

the acquisition module (1) is used for acquiring high-voltage mode locking action condition information;

the characteristic recognition module (2) is used for receiving the high-voltage mode locking action condition information and outputting an effective system pressure peak value;

The logic operation module (3) is used for receiving an effective system pressure peak value to obtain a mode locking reference pressure value, acquiring a flow channel pressure loss meter and analyzing to form an actual mode locking force;

and the digital display terminal (4) is used for inputting parameter conditions and outputting and displaying actual mode locking force.