CN107338354A - The control method of air-flow velocity - Google Patents
The control method of air-flow velocity Download PDFInfo
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- CN107338354A CN107338354A CN201710381731.9A CN201710381731A CN107338354A CN 107338354 A CN107338354 A CN 107338354A CN 201710381731 A CN201710381731 A CN 201710381731A CN 107338354 A CN107338354 A CN 107338354A
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- temperature value
- flow velocity
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention provides a kind of control method of air-flow velocity.The control method of the air-flow velocity provided comprises the following steps：11) temperature value of cooled region is gathered；12) judge the temperature value whether in preset temperature value section；If it is, into step 13)；13) corresponding relation of the temperature value section and air-flow velocity is obtained；14) according to the corresponding relation, the air-flow velocity is determined；15) the output gas flow flow velocity for controlling blower fan is the air-flow velocity.The control method of air-flow velocity provided by the invention can solve the problem that current workpiece described in background technology is after heat treatment influenceed in cooling procedure by temperature change, the problem of causing its degradation.
Description
Technical field
The present invention relates to technical field of metal heat treatment, more particularly to a kind of control method of air-flow velocity.
Background technology
It is known that metal heat treatmet is a kind of extremely common intermetallic composite coating mode, metal heat treatmet includes normalizing, returned
Fire, annealing etc..Such as in the process of railway vehicle axle, generally require to include secondary normalizing and drawing process, and
In cooling procedure of the axletree after normalizing is heat-treated, the performance of its cooling velocity and axletree has direct relation.And in actual life
During production, axletree is usually to have what blower fan air blast was cooled down after normalizing is heat-treated, it is clear that, this air-cooled technique is by season
Section has a great influence with temperature.Particularly in sweltering heat time summer, through it is this it is air-cooled after axletree its yield strength be extremely difficult to
Standard requirement.Drawn according to the years of work experience of staff, only when being used for the air-flow velocity of cooling down workpiece according to temperature
Degree changes and changed, and workpiece performance after heat treatment is not deteriorated, even more superior.
So, there is provided it is a kind of the method for cooling air-flow flow velocity to be changed according to the change of environment temperature in cooled region
It is urgent problem to be solved.
The content of the invention
The present invention provides a kind of control method of air-flow velocity, thermally treated to solve current workpiece described in background technology
Because cooled region temperature is different in cooling procedure afterwards, the problem of causing workpiece degradation.
In order to solve the above-mentioned technical problem, the invention discloses following technical scheme：
The control method of air-flow velocity；Including
11) temperature value of cooled region is gathered；
12) judge the temperature value whether in preset temperature value section；If it is, into step 13)；
13) corresponding relation of the temperature value section and air-flow velocity is obtained；
14) according to the corresponding relation, the air-flow velocity is determined；
15) the output gas flow flow velocity for controlling blower fan is the air-flow velocity.
Preferably, in the control method of said flow flow velocity：Step 11) includes：
21) in the multiple cooled regions of continuous acquisition diverse location temperature value；
22) maximum and a minimum value in multiple temperature values are removed；
23) the remaining temperature value for carrying out step 22) is averaged；
24) temperature value using the result of step 23) as the cooled region.
Preferably, in the control method of said flow flow velocity：Step 12) includes：
31) temperature value and the minimum value in all preset temperature value sections；
32) judge whether all preset temperature value sections include particular temperature value section, and the particular temperature value section
Minimum value be less than or equal to the temperature value, if it is, into step 33)；
33) judge whether all particular temperature value sections include target temperature value section, and the target temperature value
The maximum in section is more than the temperature value, if it is, the temperature value is located in the target temperature value section.
Preferably, in the control method of said flow flow velocity：
The different preset temperature value sections correspond to the different air-flow velocities.
Preferably, in the control method of said flow flow velocity：
The preset temperature value section is that the corresponding air-flow velocity is 15m/s-30m/s less than 0 degree Celsius；
The preset temperature value section is that the corresponding air-flow velocity is 30m/s-60m/ more than or equal to 0 degree Celsius
s。
Preferably, in the control method of said flow flow velocity：
The preset temperature value section be more than or equal to 0 degree Celsius, and less than 15 degrees Celsius, the corresponding air-flow stream
Speed is 30m/s-45m/s；
The preset temperature value section be more than or equal to 15 degrees Celsius, and less than 25 degrees Celsius, the corresponding air-flow
Flow velocity is 45m/s-60m/s；
The preset temperature value section is that the corresponding air-flow velocity is 60m/s more than or equal to 25 degrees Celsius.
Preferably, in the control method of said flow flow velocity：Also include：Step
16) the output gas flow flow velocity of the blower fan is controlled to be more than 15 minutes for the time of the air-flow velocity.
The control method course of work of air-flow velocity provided by the invention is as follows：
In the control method of this air-flow velocity provided by the invention, the temperature value in cooled region is first gathered, is then sentenced
Whether disconnected temperature value is in preset temperature value section, if it is, can obtain, the temperature range is corresponding with air-flow velocity to close
System, further according to the corresponding relation of the two, determines air-flow velocity, finally controls the output gas flow flow velocity of blower fan corresponding to temperature value
Air-flow velocity.This air-flow velocity control method provided by the invention can be different according to the temperature value in cooled region, accordingly
Change blower fan output gas flow air-flow velocity, it is achieved thereby that alloing the cooling procedure of workpiece after heat treatment according to temperature
Change and change the purpose of air-flow velocity, avoid because temperature change cause its hydraulic performance decline the problem of.By staff
Multiple authentication, by taking rail car axle as an example, using air-flow velocity provided by the invention control method cooling after axletree its
Tensile yield strength is from original 335Mpa~400Mpa liftings to 370Mpa~420Mpa at the radius of axle journal 1/2；Tensile strength
From original 640Mpa~700Mpa liftings to 690Mpa~740Mpa；And toughness index elongation percentage A (%) and contraction percentage of area Z
(%) remains to keep, and does not reduce.
By above-mentioned data, the control method of air-flow velocity provided by the invention can solve the problem that described in background technology
After heat treatment its cooling procedure is easily influenced by ambient temperature for axletree at present, the problem of causing workpiece hydraulic performance decline.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly or in background technology, below will be to embodiment or the back of the body
The required accompanying drawing used is briefly described in the description of scape technology, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the control method flow chart of air-flow velocity disclosed in the embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example is only the part of the embodiment of the present invention, rather than whole embodiments.It is general based on the embodiment in the present invention, this area
The every other embodiment that logical technical staff is obtained under the premise of creative work is not made, should all belong to guarantor of the present invention
The scope of shield.
Fig. 1 is refer to, Fig. 1 is the control method flow chart of air-flow velocity disclosed in the embodiment of the present invention.Disclosed side
Method is used to solving some current workpiece after heat treatment easily to be influenceed in cooling procedure by cooling regional temperature change, causes its performance
The problem of decline.
Method shown in Fig. 1, comprises the following steps：
S100, the temperature value for gathering cooled region.
It is known that generally workpiece is after heat treatment directly cooled down in atmosphere, but in order to accelerate workpiece cooling speed
Degree, improves production efficiency, and some enterprises carry out aeration operation often through blower fan, air replaced using uniform speed airflow, to workpiece
Cooled down.In this step, the region that workpiece is placed can be cooled region, can gather cooled region by temperature sensor
Interior temperature value, naturally it is also possible to which the temperature value in cooled region is gathered by other equipment.Can be with multi collect cooled region
Temperature value, and the temperature value as cooled region of averaging.
S200, judge temperature value whether in preset temperature value section.
In this step, PLC control system can be the device of judgement and computing effect, and temperature sensor can pass through electricity
Road is connected with PLC control system, and whether PLC control system can be used for judging temperature value in preset temperature value section.This
Art personnel can pre-set multiple temperature value sections according to the location temperature Change situation of 1 year, as default
Temperature value section.PLC control system can judge the temperature value position gathered in cooled region according to pre-set programs and given data
In in which default temperature value section, when step S200 judged result is is, then it can consider that temperature value is located at some
In preset temperature value section, therefore step S300 can be entered.
When step S200 judged result is no, then illustrate the temperature value of cooled region of collection not default multiple
In temperature value section, then staff can determine the temperature value of current cooled region by the method for manual measurement, and judge
Whether the maximum in all preset temperature value sections is more than by the temperature value of manual measurement, or whether is less than all default temperature
The minimum value in angle value section.If it is, the output gas flow flow velocity of blower fan with manual control blower fan, can be adjusted to proper flow rates model
Enclose；If it is not, then being the system failure, those skilled in the art can be overhauled with hard stop.
S300, the corresponding relation for obtaining temperature value section and air-flow velocity.
In this step, after judging that temperature value is located at preset temperature value section, it can be obtained and set by PLC control system
Data.Those skilled in the art can set different temperatures value section according to influence of the temperature to workpiece cooldown rate and correspond to respectively
Different air-flow velocities, and be input in PLC control system.Obvious, temperature is higher, and air-flow velocity gets over great talent and can guarantee that workpiece
Cooldown rate.
S400, according to corresponding relation, determine air-flow velocity.
In this step, PLC control system can according to the temperature value of known cooled region, multiple preset temperature value sections and
The corresponding relation of air-flow velocity, obtain the air-flow velocity corresponding to known temperature value.Those skilled in the art can be according to experiment
And calculating, air-flow velocity corresponding to multiple preset temperature value sections difference is set respectively.
S500, control air-flow velocity of the blower fan output gas flow flow velocity corresponding to known temperature value.
In this step, blower fan can be the equipment for providing cooling air-flow, and PLC control system can be connected by circuit and blower fan
Connect, PLC control system can control blower fan to start or change current output gas by way of inputting different electrical signals to blower fan
Flow velocity is flowed, until the output gas flow flow velocity of blower fan reaches the air-flow velocity corresponding to known temperature value.Those skilled in the art can
With regulation when the current output gas flow flow velocity of blower fan appearance differs larger situation with target airflow flow velocity, control blower fan can be fast
Speed changes output gas flow flow velocity to target airflow flow velocity.
The control method of air-flow velocity disclosed in the embodiment of the present invention has the advantages that：
In the control method of air-flow velocity disclosed in the embodiment of the present invention, the temperature value in cooled region, PLC controls are first gathered
System processed may determine that temperature value whether in preset temperature value section, if it is, PLC control system can obtain temperature value
Corresponding relation between section and air-flow velocity, and target airflow flow velocity can be obtained according to corresponding relation, finally, PLC controls
System can control the output gas flow flow velocity of blower fan to reach target airflow flow velocity.
By multiple authentication, by taking rail car axle as an example, cooled down using air-flow velocity control method provided by the present invention
At its radius of axle journal 1/2 of axletree afterwards tensile yield strength from original 335Mpa~400Mpa liftings to 370Mpa~
420Mpa；Tensile strength is from original 640Mpa~700Mpa liftings to 690Mpa~740Mpa；And toughness index elongation percentage A
(%) and contraction percentage of area Z (%) remain to keep, and do not reduce.
Control method disclosed in the embodiment of the present invention corresponding according to the change of cooled region environment temperature can change gas
Flow flow velocity.Obvious, different air-flow velocities can change the cooldown rate of workpiece, and above-mentioned data illustrate, using the present invention
The air-flow velocity control method of offer can solve to cause its degradation because environment temperature changes in workpiece cooling procedure
Problem.
Further, step S100 can include S110, can be with the temperature of diverse location in the multiple cooled regions of continuous acquisition
Angle value；S120, a maximum and a minimum value in multiple temperature values of collection can be removed；S130, can to carry out
Step S120 residuals temperatures value is averaged；S140, the temperature value using step S130 result as cooled region.
Specifically, mounting temperature sensor can be distinguished in the diverse location of cooled region, and multiple temperature sensors are equal
It is connected by circuit with PLC control system, multiple temperature sensors can detect the temperature of diverse location in cooled region respectively
Value, and be input in PLC control system.Then PLC control system may determine that the magnitude relationship between multiple temperature values, and
The maximum and a minimum value in multiple temperature values can be removed.Last PLC control system can be to remaining multiple
Temperature value is taken the mean, and the average of multiple temperature values can be as the temperature value of cooled region, and this is advantageous to temperature value number
Prevented according to the accuracy of collection because accidentalia causes to cannot function as sample data the temperature value of collection is higher or relatively low.
Step S200 can include S210, the temperature value that can compare cooled region and all preset temperature value sections most
Small value；S220, it may determine that whether all preset temperature value sections include specified temp section, and the minimum in specified temp section
Value less than or equal to cooled region temperature value, if it is, into step S230；S230, it may determine that all particular temperature values
Whether section includes target temperature value section, and the maximum in target temperature value section is more than the temperature value of cooled region, if
It is that the temperature value that then can be determined that cooled region is located in target temperature value section.
Specifically, those skilled in the art can preset multiple temperature value sections according to the temperature Change of locality, and
The boundary value non-overlapping copies in multiple temperature value sections.PLC control system can be by the temperature of the cooled region gathered through step S100
Angle value is compared with the minimum value in all temperature value sections, it is possible to determine that the temperature value of cooled region is at least greater than or equal to one
The minimum value in temperature value section, it is clear that, at least one temperature value section is particular temperature value section.Then, PLC controls system
System at least one particular temperature value section can be judged, judge at least one particular temperature value section maximum whether
More than the temperature value of cooled region, it is clear that, have and the maximum in only one particular temperature value section is more than cooled region
Temperature value, then the particular temperature value section is target temperature value section, it is possible to determine that the temperature value of cooled region is located at target
In temperature value section.
A kind of specific preferred scheme is that different preset temperature value sections can correspond to different air-flow velocities respectively,
It can so make this control method be controlled air-flow velocity to change according to temperature change more accurate, be advantageous to workpiece cooling procedure
Preferably carry out.
More specifically, when preset temperature value section is less than 0 degree Celsius, corresponding air-flow velocity can be 15m/s-30m/
s；When preset temperature value section is more than or equal to 0 degree Celsius, corresponding air-flow velocity can be 30m/s-60m/s.
Further, preset temperature value section be more than or equal to 0 degree Celsius, and less than 15 degrees Celsius when, it is corresponding
Air-flow velocity can be 30m/s-45m/s；Preset temperature value section is more than or equal to 15 degrees Celsius, and less than 25 degrees Celsius
When, corresponding, air-flow velocity can be 45m/s-60m/s；It is right when preset temperature value section is more than or equal to 25 degrees Celsius
The air-flow velocity answered can be 60m/s.
The output gas flow flow velocity that control method provided by the invention can also include step S600, control blower fan is target gas
The time for flowing flow velocity is more than 15 minutes.
In this step, those skilled in the art with setting program, can make the output gas flow stream of PLC control system control blower fan
The time that speed is persistently dried with target airflow flow velocity is more than 15 minutes, by checking, workpiece is carried out using this control method cold
But, blower fan is with the continuously work cooling that can be completed to workpiece in 15 minutes of target airflow flow velocity.
Herein, only emphasis describes difference with other schemes to each preferred scheme, as long as each preferred scheme
Do not conflict, can be combined, the embodiment formed after combination is also within category disclosed in this specification, it is contemplated that
Text is succinct, herein with regard to no longer individually being described to combining formed embodiment.
Described above is only the embodiment of the present invention, is made skilled artisans appreciate that or realizing this hair
It is bright.A variety of modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Described above is only the embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. the control method of air-flow velocity, it is characterised in that comprise the following steps：
11) temperature value of cooled region is gathered；
12) judge the temperature value whether in preset temperature value section；If it is, into step 13)；
13) corresponding relation of the temperature value section and air-flow velocity is obtained；
14) according to the corresponding relation, the air-flow velocity is determined；
15) the output gas flow flow velocity for controlling blower fan is the air-flow velocity.
2. control method according to claim 1, it is characterised in that step 11) includes：
21) in the multiple cooled regions of continuous acquisition diverse location temperature value；
22) maximum and a minimum value in multiple temperature values are removed；
23) the remaining temperature value for carrying out step 22) is averaged；
24) temperature value using the result of step 23) as the cooled region.
3. control method according to claim 1, it is characterised in that step 12) includes：
31) temperature value and the minimum value in all preset temperature value sections；
32) judge whether all preset temperature value sections include particular temperature value section, and the particular temperature value section is most
Small value is less than or equal to the temperature value, if it is, into step 33)；
33) judge whether all particular temperature value sections include target temperature value section, and the target temperature value section
Maximum be more than the temperature value, if it is, the temperature value is located in the target temperature value section.
4. control method according to claim 3, it is characterised in that the different preset temperature value sections is corresponding different
The air-flow velocity.
5. control method according to claim 4, it is characterised in that
The preset temperature value section is that the corresponding air-flow velocity is 15m/s-30m/s less than 0 degree Celsius；
The preset temperature value section is that the corresponding air-flow velocity is 30m/s-60m/s more than or equal to 0 degree Celsius.
6. control method according to claim 5, it is characterised in that
The preset temperature value section is more than or equal to 0 degree Celsius, and less than 15 degrees Celsius, the corresponding air-flow velocity is
30m/s-45m/s；
The preset temperature value section be more than or equal to 15 degrees Celsius, and less than 25 degrees Celsius, the corresponding air-flow velocity
For 45m/s-60m/s；
The preset temperature value section is that the corresponding air-flow velocity is 60m/s more than or equal to 25 degrees Celsius.
7. control method according to claim 1, it is characterised in that also including step
16) the output gas flow flow velocity of the blower fan is controlled to be more than 15 minutes for the time of the air-flow velocity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710381731.9A CN107338354A (en) | 2017-05-26 | 2017-05-26 | The control method of air-flow velocity |
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| CN201710381731.9A CN107338354A (en) | 2017-05-26 | 2017-05-26 | The control method of air-flow velocity |
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| CN107338354A true CN107338354A (en) | 2017-11-10 |
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ID=60220456
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116179839A (en) * | 2022-11-07 | 2023-05-30 | 江苏新恒基特种装备股份有限公司 | Cooling rate control method, device and system for heat treatment |
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| CN1672107A (en) * | 2002-07-31 | 2005-09-21 | 松下电器产业株式会社 | Method, apparatus and program of thermal analysis, heat controller and heating furnace using the method |
| CN101755069A (en) * | 2006-10-12 | 2010-06-23 | 气体产品与化学公司 | Thermal deposition surface treatment method, system and product |
| CN103658657A (en) * | 2013-11-25 | 2014-03-26 | 宁波恒普真空技术有限公司 | Controllable cooling method for metal powder injection forming vacuum degreasing sintering furnace |
| CN105861787A (en) * | 2016-05-04 | 2016-08-17 | 上海大学 | High-throughout preparing method for heat treatment samples |
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2017
- 2017-05-26 CN CN201710381731.9A patent/CN107338354A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672107A (en) * | 2002-07-31 | 2005-09-21 | 松下电器产业株式会社 | Method, apparatus and program of thermal analysis, heat controller and heating furnace using the method |
| CN101755069A (en) * | 2006-10-12 | 2010-06-23 | 气体产品与化学公司 | Thermal deposition surface treatment method, system and product |
| CN103658657A (en) * | 2013-11-25 | 2014-03-26 | 宁波恒普真空技术有限公司 | Controllable cooling method for metal powder injection forming vacuum degreasing sintering furnace |
| CN105861787A (en) * | 2016-05-04 | 2016-08-17 | 上海大学 | High-throughout preparing method for heat treatment samples |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116179839A (en) * | 2022-11-07 | 2023-05-30 | 江苏新恒基特种装备股份有限公司 | Cooling rate control method, device and system for heat treatment |
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Effective date of registration: 20171225 Address after: 030032 No. 17, electronic street, Taiyuan economic and Technological Development Zone, Shanxi, Taiyuan Applicant after: TAIYUAN HEAVY INDUSTRY RAILWAY TRAFFIC EQUIPMENT CO., LTD. Address before: 030024 Berlin Yuhe street, Taiyuan, Taiyuan, Shanxi Applicant before: Taiyuan Heavy Industry Co., Ltd. |
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Application publication date: 20171110 |