CN107498386B - Cooling unit control method and device, cooling unit and cooling system - Google Patents
Cooling unit control method and device, cooling unit and cooling system Download PDFInfo
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- CN107498386B CN107498386B CN201710690546.8A CN201710690546A CN107498386B CN 107498386 B CN107498386 B CN 107498386B CN 201710690546 A CN201710690546 A CN 201710690546A CN 107498386 B CN107498386 B CN 107498386B
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- 238000001816 cooling Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000020169 heat generation Effects 0.000 claims abstract description 41
- 238000003860 storage Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
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Abstract
The invention discloses a cooling unit control method and device, a cooling unit and a cooling system, and relates to the field of control. The cooling unit control device obtains current working parameters of the machine tool, predicts the current heat generation value of the machine tool by using the working parameters, determines the operation compensation value of the cooling unit according to the current heat generation value of the machine tool, and correspondingly adjusts the power of the cooling unit by using the operation compensation value. Therefore, the power of the cooling unit can be adjusted in advance by utilizing the time difference between the change of the machine tool running state and the change of the temperature, so that the temperature fluctuation caused by the change of the cooling unit running state requiring time is offset, and the stable cooling temperature is provided for the machine tool.
Description
Technical Field
The invention relates to the field of control, in particular to a cooling unit control method and device, a cooling unit and a cooling system.
Background
With the progress of a new industrial revolution, industrial intelligence becomes an important technical development direction in the industrial field. The manufacture of machine tools therein provides an important basis for the industry, and as a means of providing cooling for machine tools, the stability and intelligence of cooling units is also of increasing importance. This is because ensuring a constant temperature can play a crucial role in the quality of the process.
The existing cooling unit control method is to detect the inlet temperature, the outlet temperature or the temperature of the machine tool and then perform corresponding control. The control mode is easy to cause the problems that the temperature of the machine tool changes, but the running state of the cooling unit is not changed, so that the defects of large temperature fluctuation range and untimely cooling are easily caused.
Disclosure of Invention
The embodiment of the invention provides a cooling unit control method and device, a cooling unit and a cooling system.
According to one aspect of the invention, a cooling unit control method is provided, which comprises the following steps:
acquiring current working parameters of a machine tool;
predicting the current heat value of the machine tool by using the working parameters;
determining an operation compensation value of the cooling unit according to the current heat generation value of the machine tool;
and correspondingly adjusting the power of the cooling unit by using the operation compensation value so as to provide stable cooling temperature for the machine tool.
In one embodiment, the adjusting the power of the chiller train accordingly using the operational compensation value comprises:
if the operation compensation value is a positive value, increasing the power of the cooling unit;
and if the operation compensation value is a negative value, reducing the power of the cooling unit.
In one embodiment, the magnitude of the power adjustment of the chiller train is related to the magnitude of the absolute value of the operational offset.
In one embodiment, determining the operation compensation value of the cooling unit according to the current heat generation value of the machine tool comprises:
determining a predicted fluctuation value according to the difference between the current heat generation value of the machine tool and the heat generation value before a preset time interval;
and determining an operation compensation value of the cooling unit by using the predicted fluctuation value and a preset fluctuation compensation value.
In one embodiment, predicting the current heating value of the machine tool using the operating parameters comprises:
and predicting the current heat generation value of the machine tool according to the ratio of the weighted sum of the working parameters to the sum of the maximum values of the working parameters.
In one embodiment, the sum of the weights of the operating parameters is 1.
In one embodiment, the operating parameter is a parameter associated with the heating value of the machine tool.
According to another aspect of the present invention, there is provided a cooling unit control apparatus including:
the parameter acquisition module is used for acquiring the current working parameters of the machine tool;
the heating value prediction module is used for predicting the current heating value of the machine tool by using the working parameters;
the operation compensation determining module is used for determining an operation compensation value of the cooling unit according to the current heat generation value of the machine tool;
and the power adjusting module is used for correspondingly adjusting the power of the cooling unit by utilizing the operation compensation value so as to provide stable cooling temperature for the machine tool.
In one embodiment, the power adjustment module is configured to increase the power of the cooling unit when the operation compensation value is a positive value; and the power of the cooling unit is reduced under the condition that the operation compensation value is a negative value.
In one embodiment, the magnitude of the power adjustment of the chiller train is related to the magnitude of the absolute value of the operational offset.
In one embodiment, the operation compensation determining module further comprises:
the prediction fluctuation determining unit is used for determining a prediction fluctuation value according to the difference between the current heat generation value of the machine tool and the heat generation value before the preset time interval;
and the operation compensation determining unit is used for determining the operation compensation value of the cooling unit according to the predicted fluctuation value and the preset fluctuation compensation value.
In one embodiment, the heating value prediction module is used for predicting the current heating value of the machine tool according to the ratio of the weighted sum of the working parameters to the sum of the maximum values of the working parameters.
In one embodiment, the sum of the weights of the operating parameters is 1.
In one embodiment, the operating parameter is a parameter associated with the heating value of the machine tool.
According to another aspect of the present invention, there is provided a cooling unit control apparatus including:
a memory to store instructions;
a processor coupled to the memory, the processor configured to perform a method according to any of the embodiments described above based on instructions stored in the memory.
According to another aspect of the present invention, there is provided a cooling unit comprising a cooling unit control apparatus according to any one of the embodiments described above.
According to another aspect of the present invention, there is provided a cooling system comprising:
a cooling unit as in any of the embodiments above;
and the machine tool is used for providing current working parameters to the cooling unit at a preset period.
According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, which when executed by a processor, implement a method as described in any of the above embodiments.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of a cooling unit control method according to the present invention.
Fig. 2 is a schematic diagram of an embodiment of a cooling unit control device according to the present invention.
Fig. 3 is a schematic diagram of another embodiment of the cooling unit control device according to the present invention.
Fig. 4 is a schematic diagram of a cooling unit control device according to another embodiment of the present invention.
FIG. 5 is a schematic view of one embodiment of the cooling assembly of the present invention.
FIG. 6 is a schematic view of one embodiment of the cooling system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of an embodiment of a cooling unit control method according to the present invention. Alternatively, the method steps of the present embodiment may be performed by a chiller unit control device. Wherein:
and 101, acquiring the current working parameters of the machine tool.
Alternatively, the operating parameter may be a parameter associated with the heat generation amount of the machine tool. For example, the operating parameters may include bit rotational speed (Rev), cutting speed (Sp), cut material hardness (H), and the like.
And step 102, predicting the current heat generation value of the machine tool by using the working parameters.
Alternatively, the current heat generation amount of the machine tool can be predicted according to the ratio of the weighted sum of the operating parameters to the sum of the maximum values of the operating parameters. Wherein, the sum of the weights of the working parameters is 1.
For example, three operating parameters are set, namely the bit rotational speed (Rev), the cutting speed (Sp), the cutting material hardness (H), x, y and z, respectively, and x + y + z is equal to 1. The corresponding heat generation value Qd can be calculated according to the following formula (1).
Wherein Revmax is the maximum value of the rotating speed range of the drill bit, Spmax is the maximum value of the cutting speed range, and Hmax is the maximum value of the hardness of the cutting material.
It should be noted that formula (1) is only an example. The user can increase or decrease corresponding parameters according to needs, and still predicts the current heat generation value of the machine tool by adopting the ratio of the weighted sum of each working parameter to the sum of the maximum values of each working parameter when calculating the heat generation value Qd.
And 103, determining an operation compensation value of the cooling unit according to the current heat generation value of the machine tool.
Optionally, the above steps may include:
and determining a predicted fluctuation value according to the difference between the current heat generation value of the machine tool and the heat generation value before the preset time interval, and determining an operation compensation value of the cooling unit by using the predicted fluctuation value and a preset fluctuation compensation value.
For example, let the current heat generation value of the machine tool be QdT1Before a predetermined time interval TThe heating value is QdT0Then, the predicted fluctuation value Qr is as shown in equation (2).
Qr＝＝QdT1-QdT0(2)
Next, the predicted fluctuation value Qr and the preset fluctuation compensation value Qe are used to determine the operation compensation value of the cooling unit. For example, the operation compensation value of the cooling unit may be determined based on the sum or difference of the predicted fluctuation value Qr and the fluctuation compensation value Qe set in advance.
And 104, correspondingly adjusting the power of the cooling unit by using the operation compensation value so as to provide stable cooling temperature for the machine tool.
Optionally, if the operation compensation value is a positive value, the power of the cooling unit is increased, and if the operation compensation value is a negative value, the power of the cooling unit is decreased.
In addition, the power adjustment amplitude of the cooling unit is related to the absolute value of the operation compensation value.
For example, if the operation compensation value is 50, the power of the cooling unit is increased. If the operation compensation value is 60, the power increase of the cooling unit is larger than that of the case of 50. Correspondingly, if the operating offset is-20, the power of the cooling unit is reduced. If the operation compensation value is-30, the power reduction of the cooling unit is increased more than that of the case of the operation compensation value of-20.
Based on the cooling unit control method provided by the above embodiment of the present invention, the current heat generation amount of the machine tool is predicted by using the current working parameters of the machine tool, the operation compensation value of the cooling unit is determined according to the current heat generation amount of the machine tool, and the power of the cooling unit is correspondingly adjusted by using the operation compensation value, so as to provide a stable cooling temperature for the machine tool.
Fig. 2 is a schematic diagram of an embodiment of a cooling unit control device according to the present invention. As shown in fig. 2, the control apparatus may include a parameter acquisition module 21, a heating value prediction module 22, an operation compensation determination module 23, and a power adjustment module 24. Wherein:
the parameter obtaining module 21 is used for obtaining the current working parameters of the machine tool.
Wherein the working parameter is a parameter associated with the heat generation amount of the machine tool.
For example, the operating parameters may include bit rotational speed (Rev), cutting speed (Sp), cut material hardness (H), and the like.
The heating value prediction module 22 is used for predicting the current heating value of the machine tool by using the working parameters.
Optionally, the heating value prediction module 22 is configured to predict a current heating value of the machine tool according to a ratio of the weighted sum of the operating parameters to the sum of the maximum values of the operating parameters. Wherein, the sum of the weights of the working parameters is 1.
For example, the heat generation amount value may be calculated according to the above formula (1).
The operation compensation determining module 23 is used for determining an operation compensation value of the cooling unit according to the current heat generation value of the machine tool;
as shown in fig. 3, the operation compensation determining module 23 may include a prediction fluctuation determining unit 231 and an operation compensation determining unit 232. Wherein:
the predicted fluctuation determining unit 231 is configured to determine a predicted fluctuation value based on a difference between a current heat generation amount value of the machine tool and a heat generation amount value before a predetermined time interval.
For example, the predicted fluctuation value may be determined using the above equation (2).
The operation compensation determining unit 232 is configured to determine an operation compensation value of the cooling unit according to the predicted fluctuation value and a preset fluctuation compensation value.
For example, the operational compensation value of the cooling unit may be determined from the sum or difference of the predicted fluctuation value and a preset fluctuation compensation value.
Returning to fig. 2, the power adjustment module 24 is configured to adjust the power of the cooling unit accordingly using the operational compensation value to provide a stable cooling temperature for the machine tool.
Optionally, the power adjusting module is configured to increase the power of the cooling unit when the operation compensation value is a positive value, and is further configured to decrease the power of the cooling unit when the operation compensation value is a negative value.
Wherein, the power adjustment amplitude of the cooling unit is related to the absolute value of the operation compensation value.
Fig. 4 is a schematic diagram of a cooling unit control device according to another embodiment of the present invention. As shown in fig. 4, the robot control device includes a memory 41 and a processor 42. Wherein:
the memory 41 is used for storing instructions, the processor 42 is coupled to the memory 41, and the processor 42 is configured to execute the method according to any embodiment in fig. 1 based on the instructions stored in the memory.
As shown in fig. 4, the cooling unit control device further includes a communication interface 43 for information interaction with other devices. Meanwhile, the device also comprises a bus 44, and the processor 42, the communication interface 43 and the memory 41 are communicated with each other through the bus 44.
The memory 41 may comprise a high-speed RAM memory, and may further comprise a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 41 may also be a memory array. The storage 41 may also be partitioned, and the blocks may be combined into virtual volumes according to certain rules.
Further, the processor 42 may be a central processing unit CPU, or may be an application Specific Integrated circuit ASIC (application Specific Integrated Circuit), or one or more Integrated circuits configured to implement embodiments of the present invention.
The invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, which when executed by a processor implement the method according to any one of the embodiments in fig. 1.
FIG. 5 is a schematic view of one embodiment of the cooling assembly of the present invention. As shown in fig. 5, the cooling unit 51 is provided with a cooling unit control device 52. The cooling unit control device 52 is a cooling unit control device according to any one of the embodiments shown in fig. 2 to 4.
FIG. 6 is a schematic view of one embodiment of the cooling system of the present invention. As shown in fig. 6, the system includes a cooling unit 61 and a machine tool 62. The cooling unit 61 is a cooling unit according to any one of the embodiments shown in fig. 5.
The machine tool 62 is used to provide the cooling unit 61 with the current operating parameters at a predetermined period, so that the cooling unit control device provided in the cooling unit 61 adjusts the power of the cooling unit accordingly according to the current operating parameters of the machine tool 62, so as to provide the machine tool 62 with a stable cooling temperature.
In fig. 6, a solid line indicates a line through which the cooling unit supplies the coolant to the machine tool, and a broken line indicates a communication line through which the machine tool transmits the operating parameter to the cooling unit.
By implementing the method, the current heat generation value of the machine tool is predicted by utilizing the current working parameters of the machine tool, the operation compensation value of the cooling unit is determined according to the current heat generation value of the machine tool, and the power of the cooling unit is correspondingly adjusted by utilizing the operation compensation value. Therefore, the power of the cooling unit can be adjusted in advance by utilizing the time difference between the change of the machine tool running state and the change of the temperature, so that the temperature fluctuation caused by the change of the cooling unit running state requiring time is offset, and the stable cooling temperature is provided for the machine tool.
In addition, in order to further simplify the control flow and reduce the communication data volume, the parameters of the machine tool under the operating condition can be divided, for example, the parameters are divided by three gears of high, medium and low, so that the communication data volume of the machine tool and the cooling unit can be greatly reduced. Accordingly, the cooling unit does not need to calculate a plurality of parameters, and whether the operation heating value of the machine tool is increased or reduced is predicted only through the gear value change. The magnitude of the change is also indicated using the "high, medium, low" third gear. The corresponding compensation value is set to increase the running power of the cooler.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (14)
1. A cooling unit control method, comprising:
acquiring current working parameters of a machine tool;
predicting the current heat generation value of the machine tool by using the working parameters;
determining an operation compensation value of the cooling unit according to the current heat generation value of the machine tool;
correspondingly adjusting the power of the cooling unit by using the operation compensation value so as to provide stable cooling temperature for the machine tool, wherein the power adjustment amplitude of the cooling unit is related to the absolute value of the operation compensation value;
the method for predicting the current heat generation value of the machine tool by using the working parameters comprises the following steps:
and predicting the current heat generation value of the machine tool according to the ratio of the weighted sum of the working parameters to the sum of the maximum values of the working parameters.
2. The method of claim 1,
correspondingly adjusting the power of the cooling unit by using the operation compensation value comprises the following steps:
if the operation compensation value is a positive value, increasing the power of the cooling unit;
and if the operation compensation value is a negative value, reducing the power of the cooling unit.
3. The method according to any one of claims 1-2,
determining the operation compensation value of the cooling unit according to the current heat generation value of the machine tool comprises the following steps:
determining a predicted fluctuation value according to the difference between the current heat generation value of the machine tool and the heat generation value before a preset time interval;
and determining an operation compensation value of the cooling unit by using the predicted fluctuation value and a preset fluctuation compensation value.
4. The method according to any one of claims 1-2,
and the sum of the weights of the working parameters is 1.
5. The method according to any one of claims 1-2,
the working parameter is a parameter associated with a heat generation amount of the machine tool.
6. A cooling unit control apparatus, comprising:
the parameter acquisition module is used for acquiring the current working parameters of the machine tool;
the heat value prediction module is used for predicting the current heat value of the machine tool by using the working parameters, wherein the current heat value of the machine tool is predicted according to the ratio of the weighted sum of the working parameters to the sum of the maximum values of the working parameters;
the operation compensation determining module is used for determining an operation compensation value of the cooling unit according to the current heat generation value of the machine tool;
and the power adjusting module is used for correspondingly adjusting the power of the cooling unit by using the operation compensation value so as to provide stable cooling temperature for the machine tool, wherein the power adjusting amplitude of the cooling unit is related to the absolute value of the operation compensation value.
7. The apparatus of claim 6,
the power adjusting module is used for increasing the power of the cooling unit under the condition that the operation compensation value is a positive value; and the controller is also used for reducing the power of the cooling unit under the condition that the operation compensation value is a negative value.
8. The apparatus of any of claims 6-7, wherein the operational compensation determination module further comprises:
the prediction fluctuation determining unit is used for determining a prediction fluctuation value according to the difference between the current heat generation value of the machine tool and the heat generation value before a preset time interval;
and the operation compensation determining unit is used for determining the operation compensation value of the cooling unit according to the predicted fluctuation value and a preset fluctuation compensation value.
9. The apparatus according to any one of claims 6-7,
and the sum of the weights of the working parameters is 1.
10. The apparatus according to any one of claims 6-7,
the working parameter is a parameter associated with a heat generation amount of the machine tool.
11. A cooling unit control apparatus, comprising:
a memory to store instructions;
a processor coupled to the memory, the processor configured to perform implementing the method of any of claims 1-5 based on instructions stored by the memory.
12. A cooling unit comprising a cooling unit control device according to any one of claims 6-11.
13. A cooling system, comprising:
the cooling assembly of claim 12;
and the machine tool is used for providing current working parameters to the cooling unit at a preset period.
14. A computer-readable storage medium storing computer instructions which, when executed by a processor, implement the method of any one of claims 1-5.
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| CN101473709A (en) * | 2006-06-22 | 2009-07-01 | Abb技术有限公司 | Equipment and method for cooling |
| JP2010052030A (en) * | 2008-08-29 | 2010-03-11 | Fanuc Ltd | Numerical control apparatus for controlling laser beam machine |
| CN104764113A (en) * | 2015-03-10 | 2015-07-08 | 广东美的制冷设备有限公司 | Air conditioning and cooling control method and device of power device in same |
| CN106255392A (en) * | 2016-09-21 | 2016-12-21 | 珠海格力电器股份有限公司 | Heat dissipation control method, device and system for electrical cabinet |
| CN106970591A (en) * | 2016-01-14 | 2017-07-21 | 发那科株式会社 | The cooling body of machinery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050136821A1 (en) * | 2003-11-19 | 2005-06-23 | Ex-Cell-O Gmbh | Method of controlling the temperature of the work area of a processing machine and machine tool |
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- 2017-08-14 CN CN201710690546.8A patent/CN107498386B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101473709A (en) * | 2006-06-22 | 2009-07-01 | Abb技术有限公司 | Equipment and method for cooling |
| JP2010052030A (en) * | 2008-08-29 | 2010-03-11 | Fanuc Ltd | Numerical control apparatus for controlling laser beam machine |
| CN104764113A (en) * | 2015-03-10 | 2015-07-08 | 广东美的制冷设备有限公司 | Air conditioning and cooling control method and device of power device in same |
| CN106970591A (en) * | 2016-01-14 | 2017-07-21 | 发那科株式会社 | The cooling body of machinery |
| CN106255392A (en) * | 2016-09-21 | 2016-12-21 | 珠海格力电器股份有限公司 | Heat dissipation control method, device and system for electrical cabinet |
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