CN115213063A - Point gum machine weighing method based on point number control - Google Patents
Point gum machine weighing method based on point number control Download PDFInfo
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- CN115213063A CN115213063A CN202210774929.4A CN202210774929A CN115213063A CN 115213063 A CN115213063 A CN 115213063A CN 202210774929 A CN202210774929 A CN 202210774929A CN 115213063 A CN115213063 A CN 115213063A
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- dispensing
- data
- control
- air pressure
- weighing method
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005303 weighing Methods 0.000 title claims abstract description 18
- 239000003292 glue Substances 0.000 claims abstract description 32
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
- B05C11/101—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to weight of a container for liquid or other fluent material; responsive to level of liquid or other fluent material in a container
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Making Paper Articles (AREA)
- Package Closures (AREA)
Abstract
The invention relates to the technical field of dispensing equipment, in particular to a dispensing machine weighing method based on point control. The invention obtains the control parameters influencing the dispensing quality and establishes the double closed-loop PID feedback control model based on the control parameters, thereby keeping the consistency of dispensing data output in unit time in real time. Through establishing a double closed-loop PID feedback control model based on control parameters, the dispensing data is used as an input value for adjusting air pressure control data in the dispensing machine, so that the dispensing quality data can reach a data standard value, accurate control of unit dispensing data through a closed-loop feedback algorithm is realized, and the problems of uncontrollable dispensing quantity and uneven dispensing of the dispensing machine due to the air pressure data, the glue characteristic and the like in various aspects during dispensing and the like in the actual production process are better solved, so that the uniformity of unit glue sprayed by a glue spraying valve is ensured, and the dispensing quality of the device is improved.
Description
Technical Field
The invention relates to the technical field of dispensing equipment, wherein IPC classification numbers are as follows: B05C5/02, in particular to a point gum machine weighing method based on point number control.
Background
The glue dispenser is a device for spraying glue on the surface or inside of the device so as to realize the assembly and processing of the device. And in the operation process of the dispensing machine, compressed gas is transmitted into the glue spraying valve, and dispensing quality data are controlled by controlling the air pressure of the glue spraying valve. However, in the actual process, due to the influence of various factors such as the temperature of the dispensing environment, the dispensing speed, the dispensing time, the specification of the workpiece, the mechanical error of the dispenser and the like, the dispensing quality data is inaccurate, and the number of dispensing points in unit time is not uniform, so that the packaging quality of the device parts is unstable, even the packaging fails, and the production and processing reliability of enterprises are influenced to a certain extent.
Patent CN201610644133 provides a dispensing machine needle, a dispensing machine and a dispensing method, in this patent, an elastic element with a deformation function is installed at a dispensing head of the dispensing machine to avoid damage caused by collision of the dispensing head in the dispensing process, but deformation of the elastic element in this patent will affect the dispensing quality and dispensing shape in a unit, thereby causing the problem of uneven distribution of dispensing points.
Patent CN201610592992 provides a method for controlling a dispensing machine to perform dispensing, in which the variation of pressure value in a dispensing needle cylinder of the dispensing machine is detected to compensate the dispensing pressure value, thereby improving the uniformity of dispensing quality data. However, the dispensing air pressure compensation method described in this patent already introduces a monitoring error by an additional sensor, and does not further calculate the relationship between the dispensing pressure and the dispensing quality, only ensures the uniformity of air pressure output in the dispensing process, but does not further prove the uniformity of the dispensing quality.
Therefore, a dispensing machine weighing method based on point control is urgently needed to be quitted for solving the problems in the existing dispensing technology.
Disclosure of Invention
Aiming at the existing problems, the invention provides a dispensing machine weighing method based on point number control, which specifically comprises the steps of obtaining control parameters influencing dispensing quality, and establishing a double closed-loop PID feedback control model based on the control parameters, so as to keep consistency of dispensing data output in unit time in real time.
Preferably, the dispensing data includes dispensing point number and dispensing quality data.
Specifically, the number of dispensing points is unit time, the quantity of glue sprayed by a glue spraying valve at a specified speed is determined, the dispensing quality data is the quality data of the number of single dispensing points, the quality data is influenced by air pressure control data in the dispensing machine, and the air pressure control data has certain control deviation in the actual control process, so that the spraying precision of the quality data can be influenced.
Preferably, the control parameters include static control parameters and dynamic control parameters.
Preferably, the static control parameter is air pressure control data, and the dynamic control parameter is dispensing speed control data.
Specifically, the dispensing speed control data includes uniform motion, uniform velocity motion and edge motion, and in an actual processing process, due to errors of a processing path, a certain nonlinear speed deviation may exist between a processing speed and a set speed standard value, and due to existence of the speed deviation, nonlinear change of dispensing quality data in unit time may be caused, so that non-uniformity of dispensing of the component device is caused, and quality of assembly of the component device is affected.
Preferably, the dispensing speed control data includes uniform motion control data and variable motion control data; the variable speed motion control data comprises variable linear motion data and variable curvilinear motion data.
Preferably, the double closed-loop PID feedback control model includes an air pressure PID feedback control model and a speed PID feedback control model.
Preferably, the air pressure PID feedback control model firstly sets a standard value of single dispensing quality data in unit time in the dispenser controller; and calculating the difference between the standard value of the dispensing quality data and the quality data of the dispenser actually sprayed out by the glue spraying valve under the specified output air pressure data.
Preferably, the glue spraying valve sprays glue on a balance, and the balance automatically collects glue dispensing quality data and transmits the glue dispensing quality data to the air pressure PID feedback control model.
Preferably, the difference value is used as an input value and is transmitted to an air pressure PID feedback control model, whether the difference value is within an allowable threshold range or not is judged, and when the difference value is within the allowable threshold range, current air pressure data are output; and when the difference value is not within the range of the allowable threshold value, performing parameter correction on the difference value, feeding the corrected difference value back to the input end of the air pressure PID feedback control model, and repeatedly judging until the difference value is within the range of the allowable threshold value.
Preferably, the current air pressure data directly acts on the dispenser controller to control the dispensing quality data sprayed by the dispensing valve to be consistent.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the double closed-loop PID feedback control model based on the control parameters is established, the dispensing data is used as an input value to adjust the air pressure control data in the dispensing machine, so that the dispensing quality data can reach a data standard value, and the unit dispensing data can be accurately controlled through a closed-loop feedback algorithm, so that the problems of uncontrollable dispensing amount and uneven dispensing caused by air pressure data, glue characteristics and the like in the dispensing process of the dispensing machine in the actual production process are better solved, thereby ensuring that the unit glue sprayed by the glue spraying valve is even, and improving the dispensing quality of the device.
(2) On the basis of (1), in the double closed-loop PID feedback control model, a control method based on dynamic parameters is adopted, the dynamic parameters are dispensing machine speed control data, dispensing quality data corresponding to different dispensing speeds are different in unit dispensing time, the phenomenon of too little dispensing or glue overflow is easy to occur, and the control data based on the dispensing speeds is established to perform real-time feedback regulation on nonlinear variable-speed motion involved in the motion process when the dispensing machine actually operates, so that the consistency of the dispensing quality data is better ensured.
Drawings
FIG. 1 is a flow chart of an air pressure PID feedback control model in a dispenser weighing method based on point control;
fig. 2 is a control diagram of a double closed-loop PID feedback control model in a point gum machine weighing method based on point control.
Detailed Description
Example 1:
in the embodiment of the invention, as shown in fig. 1, in an actual dispensing production link, because of uncontrollable and unstable air pressure at a supply end, air pressure in a glue spraying valve is often unstable, so that deviation exists between actual dispensing quality data and a standard value of the dispensing quality data, and meanwhile, glue used in a dispenser is used as a chemical substance and is greatly influenced by environmental temperature, pressure and dispensing speed, so that actual output data of the dispensing quality is further influenced.
The double closed-loop PID feedback control model is characterized in that the input value is the real-time dispensing speed of the dispenser, the output value is air pressure control data, and the air pressure control data is input into a dispenser controller to adjust the output dispensing quality data in real time.
The double closed-loop PID feedback control model comprises an air pressure PID feedback control model and a speed PID feedback control model.
The air pressure PID feedback control model comprises calibration of air pressure data and dynamic adjustment of the air pressure data, wherein the calibration of the air pressure data is set before part machining, glue is sprayed to a balance through a glue spraying valve by setting a glue dispensing quality data standard value, actual glue dispenser quality data is read in real time, the actual glue dispenser quality data is adjusted through the quality data of the actual glue dispenser, so that control errors in the air pressure data of the glue dispenser are corrected, and the air pressure data of the glue dispenser is dynamically adjusted after the correction of the air pressure data of the glue dispenser is completed.
The dynamic adjustment of the air pressure data comprises acquiring motor operation data, acquiring the dispensing speed of a dispenser in real time, calculating the difference between the dispensing speed and the preset dispensing speed, feeding the obtained difference back to a speed PID feedback control model, firstly correcting the dispensing speed, controlling and outputting the dispensing quality data of the air pressure PID feedback control model again if the corrected dispensing speed is within a specified threshold, performing parameter correction on the difference if the corrected dispensing speed is within the specified threshold, feeding the corrected difference back to the input end of the speed PID feedback control model, and repeatedly judging until the difference is within an allowable threshold.
Claims (10)
1. A dispensing machine weighing method based on point control is characterized by specifically comprising the steps of obtaining control parameters influencing dispensing quality and establishing a double closed-loop PID feedback control model based on the control parameters, so that consistency of dispensing data output in unit time is maintained in real time.
2. The weighing method for a dispensing machine based on point control as claimed in claim 1, wherein the dispensing data comprises dispensing point number and dispensing quality data.
3. The weighing method for a dispenser based on point control as claimed in claim 1, wherein the control parameters include static control parameters and dynamic control parameters.
4. The weighing method for a dispenser based on point control as claimed in claim 3, wherein the static control parameter is air pressure control data, and the dynamic control parameter is dispensing speed control data.
5. The weighing method of claim 4, wherein the dispensing speed control data comprises constant speed motion control data and variable speed motion control data; the variable speed motion control data comprises variable linear motion data and variable curvilinear motion data.
6. The weighing method for the dispenser based on the point control as claimed in claim 1, wherein the double closed-loop PID feedback control model comprises an air pressure PID feedback control model and a speed PID feedback control model.
7. The weighing method for the dispenser based on the point control as claimed in claim 6, wherein the air pressure PID feedback control model firstly sets a standard value of single dispensing quality data in unit time in the dispenser controller; and calculating the difference between the standard value of the dispensing quality data and the quality data of the dispenser actually sprayed out by the glue spraying valve under the specified output air pressure data.
8. The weighing method for the dispensing machine based on the point control as claimed in claim 7, wherein the glue spraying valve sprays the glue on a balance, and the balance automatically collects the dispensing quality data and transmits the dispensing quality data to the air pressure PID feedback control model.
9. The weighing method of the dispenser based on the point control as claimed in claim 7, wherein the difference value is used as an input value and is transmitted to the air pressure PID feedback control model, whether the difference value is within an allowable threshold range is judged, and when the difference value is within the allowable threshold range, current air pressure data is output; and when the difference value is not within the allowable threshold range, performing parameter correction on the difference value, feeding the corrected difference value back to the input end of the air pressure PID feedback control model, and repeatedly judging until the difference value is within the allowable threshold range.
10. The weighing method for a dispenser based on point control as claimed in claim 9, wherein the current air pressure data is directly applied to the dispenser controller to control the dispensing quality data of the dispensing from the dispensing valve to be consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774929.4A CN115213063A (en) | 2022-07-01 | 2022-07-01 | Point gum machine weighing method based on point number control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774929.4A CN115213063A (en) | 2022-07-01 | 2022-07-01 | Point gum machine weighing method based on point number control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115213063A true CN115213063A (en) | 2022-10-21 |
Family
ID=83608949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210774929.4A Withdrawn CN115213063A (en) | 2022-07-01 | 2022-07-01 | Point gum machine weighing method based on point number control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115213063A (en) |
-
2022
- 2022-07-01 CN CN202210774929.4A patent/CN115213063A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20221021 |