CN102637014B - Method for obtaining energy efficiency of main electromechanical driving system in machining process of numerically-controlled machine tool - Google Patents

Method for obtaining energy efficiency of main electromechanical driving system in machining process of numerically-controlled machine tool Download PDF

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CN102637014B
CN102637014B CN2012101278265A CN201210127826A CN102637014B CN 102637014 B CN102637014 B CN 102637014B CN 2012101278265 A CN2012101278265 A CN 2012101278265A CN 201210127826 A CN201210127826 A CN 201210127826A CN 102637014 B CN102637014 B CN 102637014B
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rotating speed
main transmission
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interval
energy efficiency
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CN102637014A (en
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刘霜
刘飞
王秋莲
谢俊
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Chongqing University
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Abstract

The invention discloses a new method for obtaining energy efficiency of a main electromechanical driving system in a machining process of a numerically-controlled machine tool. In the method, according to an energy efficiency mathematical model of the main electromechanical driving system in the machining process of a machine tool, a relation function of no-load power of the machine tool which is prepared in advance stage at one time and the rotating speed and a table function of an additional load loss factor of the machine tool with single-interval or multi-interval rotation speed, as long as input power process data or process curve of a motor of the main driving system of the machine tool in the machining process is recorded, the energy efficiency of the main electromechanical driving system in the machining process of the machine tool can be calculated out from the mathematical model. The method can be used for research and application of solution to a series of problems, such as research on energy consumption and energy efficiency and evaluation on energy efficiency in the machining process of the machine tool, and energy-saving optimization of cutting technology parameters, thereby having extensive application prospect.

Description

The method that the dynamo-electric main transmission energy efficiency of numerically-controlled machine process is obtained
Technical field
The invention belongs to the Machine-Tool Control technical field, relate in particular to the new method that the dynamo-electric main transmission energy efficiency of a kind of numerically-controlled machine process is obtained.
Background technology
It is the basis that manufacturing system reduces energy consumption, improves energy efficiency that the analysis of manufacturing system power consumption state and efficiency thereof assess.The research of manufacturing system efficiency evaluation problem is risen rapidly just in the world for this reason.CN102179727A invention disclosed name is called the patent of invention of " main transmission system of machine tool process consumption information online test method ", its disclosed scheme provides a kind of main transmission system of machine tool process consumption information online test method, seeks out the real time data of the main transmission system of machine tool consumption information such as spindle motor loss power, spindle motor output power, machine driven system loss power, cutting power.CN2066162 invention disclosed name is called the utility model of " machine tool energy-saving power monitoring device ", discloses a kind of machine tool energy-saving power monitoring device, uses stator current as detection signal, by shunt current, realizes the energy-conservation and power monitoring of step-down.In September, 2009, international production engineering association (CIRP) has held the 26th international meeting (the International Manufacturing Conference that makes in Ireland, IMC ' 26), with " energy efficiency and low-carbon (LC) manufacturing " as Session Topic, " in order to ensure manufacturing industry innovation and development, the energy consumption status of necessary accurate evaluation manufacture process and system " proposed.And for example USDOE has set up specially to use and has improved " industrial assessment center (the Industrial Assessment Centers) " of the energy efficiency of manufacturing enterprise's production run as primary goal.This center relies on 29 colleges and universities of the U.S., and the energy consumption status of industrial enterprise production scene is assessed and studied.During assessment, comprise each energy consumption links such as production equipment, also comprise number of motors, rated power, working time etc.But also do not relate to energy consumption and the energy efficiency assessment of machine processing system inside; Its main cause is that energy consumption and the energy efficiency data of production scene Real-time Obtaining lathe military service process are very difficult.
Lathe is the equipment basis of manufacturing system, and its efficiency evaluation is the importance that the manufacturing system efficiency is estimated.Although existing document has been done many researchs to lathe energy efficiency problem,, the not yet fine solution of the problem of obtaining of the lathe military service Process Energy efficiency of production scene, there is no convenient and practical effective ways.Its reason mainly contains 2 points: the one, and some the test data laboratory that needs obtains easily, and production scene obtains just very difficult; The 2nd, main transmission system of machine tool energy flow process is complicated, and on-the-spot model parameter is difficult to determine, thereby on-the-spot energy efficiency is difficult to obtain by model solution.
Summary of the invention
For the above-mentioned problems in the prior art, the purpose of this invention is to provide the new method that the dynamo-electric main transmission energy efficiency of a kind of numerically-controlled machine process is obtained,, by recording power input process data or the conditional curve of main transmission system of machine tool in process, can ask for online the energy efficiency of main transmission system of machine tool.
For achieving the above object, the present invention has adopted following technological means:
The method that the dynamo-electric main transmission energy efficiency of a kind of numerically-controlled machine process is obtained, is characterized in that, comprises following content:
1) set up the dynamo-electric main transmission energy efficiency Model I of numerically-controlled machine process and II:
Figure 2012101278265100002DEST_PATH_IMAGE001
=
Figure 913100DEST_PATH_IMAGE002
（I）
Figure 129318DEST_PATH_IMAGE001
=
Figure 2012101278265100002DEST_PATH_IMAGE003
（II）
Wherein, Model I is applicable to single interval rotating speed numerically-controlled machine, and modelⅱ is applicable to rotating speed numerically-controlled machine between multi-region.Refer to that there are a plurality of speed stages in some segmentation speed governing numerically-controlled machine between so-called multi-region, as high regime and low speed segment, each speed stage is a rotating speed interval, and the interval corresponding fixing driving-chain of rotating speed.In addition, above-mentioned energy efficiency model can also be reduced to respectively model III and IV:
Figure 74140DEST_PATH_IMAGE001
=
Figure 488941DEST_PATH_IMAGE004
（Ⅲ）
Figure 228227DEST_PATH_IMAGE001
= （Ⅳ）
2) the disposable early-stage preparations of the basic function of model and basic coefficients, specifically comprise
A. the dynamo-electric main transmission no-load power of numerically-controlled machine process
Figure 728478DEST_PATH_IMAGE006
With rotating speed
Figure 2012101278265100002DEST_PATH_IMAGE007
Relation function, comprise single interval rotating speed main transmission system of machine tool no-load power
Figure 476991DEST_PATH_IMAGE006
With rotating speed
Figure 746299DEST_PATH_IMAGE007
The single-relation curve, rotating speed main transmission system of machine tool no-load power between multi-region
Figure 859748DEST_PATH_IMAGE008
With rotating speed
Figure 2012101278265100002DEST_PATH_IMAGE009
About interval number
Figure 847296DEST_PATH_IMAGE010
Relation curve;
B. the additional load loss factor of single interval rotating speed main transmission system of machine tool
Figure 2012101278265100002DEST_PATH_IMAGE011
,
Figure 133921DEST_PATH_IMAGE012
,
Figure 2012101278265100002DEST_PATH_IMAGE013
, and the additional load loss factor of rotating speed main transmission system of machine tool under each interval driving-chain between multi-region
Figure 585631DEST_PATH_IMAGE014
,
Figure 2012101278265100002DEST_PATH_IMAGE015
,
Figure 932298DEST_PATH_IMAGE016
Table function;
3) only need in-site measurement numerically-controlled machine main transmission real-time power input process data or conditional curve in process during practical application
Figure 2012101278265100002DEST_PATH_IMAGE017
, then according to above-mentioned energy efficiency model, model basic function and basic coefficients, can calculate the dynamo-electric main transmission energy efficiency of machine tooling process
Figure 159141DEST_PATH_IMAGE018
.
Further, the acquisition methods of the no-load power of the dynamo-electric main transmission of numerically-controlled machine process and the relation function of rotating speed is: for single interval rotating speed lathe, choose some rotating speed points, do not cut at lathe under the prerequisite of object and start lathe and process rotating speed to this, measure the corresponding power input of lathe, record each rotating speed point
Figure 249457DEST_PATH_IMAGE007
The stationary value of lower power input is as the no-load power of lathe under this processing rotating speed
Figure 431039DEST_PATH_IMAGE006
, then simulate the relation function of no-load power and rotating speed; To rotating speed lathe between multi-region, repeat the no-load power surveying work of single interval rotating speed lathe under each rotating speed interval, then simulate no-load power
Figure 948608DEST_PATH_IMAGE008
With rotating speed
Figure 848431DEST_PATH_IMAGE009
About interval number
Figure 476859DEST_PATH_IMAGE010
Relation function.
Further, the acquisition methods of the additional load loss factor table function of main transmission system of machine tool under machining state is:, for single interval rotating speed lathe, by freely selecting rotating speed, carry out multiple different cutting experiment, measure corresponding
Figure 575265DEST_PATH_IMAGE017
With
Figure 2012101278265100002DEST_PATH_IMAGE019
Value is carried out regretional analysis, obtains one group of fixing load loss factor
Figure 263735DEST_PATH_IMAGE011
,
Figure 385275DEST_PATH_IMAGE012
,
Figure 817393DEST_PATH_IMAGE013
For rotating speed lathe between multi-region, carry out multiple different cutting experiment by freely select rotating speed under each rotating speed interval, measure corresponding
Figure 973568DEST_PATH_IMAGE017
With
Figure 832940DEST_PATH_IMAGE019
Value is carried out regretional analysis, obtains about rotating speed interval
Figure 504092DEST_PATH_IMAGE010
The load loss factor
Figure 412005DEST_PATH_IMAGE014
,
Figure 485004DEST_PATH_IMAGE015
,
Figure 452960DEST_PATH_IMAGE016
Table function.
Than prior art, the present invention has following beneficial effect:
1, only need record power input process data or the conditional curve of production scene main transmission system of machine tool in process, just can seek out the real time data of main transmission energy efficiency, its online testing process is simple to operation, and generally applicable to existing lathe.
2, calculating the basic data that lathe process main transmission energy efficiency need to obtain in advance can obtain by zero load provided by the invention and cut experiment, and its obtain manner is all very simple, has improved the operability of the inventive method; And, can continue use for its basic data of lathe of same model once obtaining, put things right once and for all, need not to carry out again obtaining before the online detection of its consumption information in the later stage.
3, the machine tooling process main transmission energy effective information that has the inventive method to detect, and the error between the machine tooling process main transmission energy effective information of reality is no more than 20%, and this error mostly is stochastic error, error amount within the engineering range of application, has guidance, reference value preferably.
4, the inventive method can be applicable to have more wide application prospect in the researchs such as the lathe energy efficiency is obtained, the efficiency assessment of mechanical processing process.
Description of drawings
Fig. 1 turning processing work figure;
The relation function schematic diagram of Fig. 2 embodiment no-load power and rotating speed;
Main transmission power input curve synoptic diagram in Fig. 3 engine lathe turning manuscript 1 part process;
Fig. 4 is the FB(flow block) of the inventive method.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is further described.
The present invention has announced the new method that the dynamo-electric main transmission energy efficiency of a kind of numerically-controlled machine process is obtained.The method is according to the dynamo-electric main transmission energy efficiency of machine tooling process mathematical model, with the relation function of disposable cut-and-dried main transmission system of machine tool no-load power and rotating speed, and the table function of rotating speed lathe additional load loss factor between the additional load loss factor of single interval rotating speed lathe or multi-region; Only need record main transmission system of machine tool power input to a machine process data or conditional curve in process, just can calculate the energy efficiency of the dynamo-electric main transmission of machine tooling process from mathematical model.
1. numerically-controlled machine main transmission energy efficiency model
Figure 611409DEST_PATH_IMAGE001
= （I）
=
Figure 717271DEST_PATH_IMAGE003
（II）
Wherein, Model I is applicable to single interval rotating speed numerically-controlled machine, and modelⅱ is applicable to rotating speed numerically-controlled machine between multi-region.Refer to that there are a plurality of speed stages in some segmentation speed governing numerically-controlled machine between so-called multi-region, as high regime and low speed segment, each speed stage is a rotating speed interval, and the interval corresponding fixing driving-chain of rotating speed.In addition, above-mentioned energy efficiency model can also be reduced to respectively model III and IV:
Figure 35120DEST_PATH_IMAGE001
=
Figure 612731DEST_PATH_IMAGE004
（Ⅲ）
Figure 660322DEST_PATH_IMAGE001
=
Figure 970080DEST_PATH_IMAGE005
（Ⅳ）
2. the acquisition methods of basic function and basic coefficients in the energy efficiency model
Basic function and the basic coefficients of four kinds of energy efficiency model needs are different, and they are respectively:
Model (I)---no-load power function
Figure 837542DEST_PATH_IMAGE020
, the load loss factor
Figure 2012101278265100002DEST_PATH_IMAGE021
With
Figure 959125DEST_PATH_IMAGE022
Model (II)---no-load power function
Figure 2012101278265100002DEST_PATH_IMAGE023
, load loss factor table function
Figure 861222DEST_PATH_IMAGE024
With
Figure 2012101278265100002DEST_PATH_IMAGE025
Model (III)---no-load power function
Figure 404199DEST_PATH_IMAGE020
, the load loss factor
Figure 24536DEST_PATH_IMAGE011
Model (IV)---no-load power function
Figure 616055DEST_PATH_IMAGE023
, load loss factor table function
Figure 638237DEST_PATH_IMAGE026
Therefore the basic function and the basic coefficients that need come to 7 kinds: i.e. no-load power function
Figure 352115DEST_PATH_IMAGE020
, the load loss factor
Figure 131852DEST_PATH_IMAGE021
With
Figure 589379DEST_PATH_IMAGE022
, the load loss factor
Figure 403751DEST_PATH_IMAGE011
, the no-load power function
Figure 288530DEST_PATH_IMAGE023
, load loss factor table function
Figure 617880DEST_PATH_IMAGE024
With , load loss factor table function
Figure 547976DEST_PATH_IMAGE026
.
1) the no-load power function obtains
The acquisition methods of the no-load power function of numerically-controlled machine is: to the lathe of production scene, set several different rotating speeds under every interval rotating speed, carry out the disposable no-load power that measures under each different rotating speeds, set up the no-load power table function as shown in table 1, then the data in his-and-hers watches 1 carry out curve fitting and can obtain the fitting function of the no-load power of this lathe about rotating speed :
Figure 603657DEST_PATH_IMAGE028
（1）
Table 1 lathe rotating speed is interval
Figure 357986DEST_PATH_IMAGE010
The no-load power table function of lower revolutions at different levels
Figure 422894DEST_PATH_IMAGE027
Figure DEST_PATH_IMAGE029
, for the lathe of single interval rotating speed, there do not is interval difference, so the relation function of the no-load power that simulates and rotating speed is
Figure 8596DEST_PATH_IMAGE030
.
2) the load loss factor obtains
2.1)
Figure DEST_PATH_IMAGE031
With
Figure 235178DEST_PATH_IMAGE032
Acquisition methods
Freely choose rotating speed in the every interval rotating speed of numerically-controlled machine, carry out
Figure DEST_PATH_IMAGE033
Group ( ) different cutting experiments, measure corresponding
Figure 142140DEST_PATH_IMAGE017
With
Figure 576490DEST_PATH_IMAGE019
Value, substitution formula (2) is contained
Figure DEST_PATH_IMAGE035
The system of equations of individual equation (
Figure 239552DEST_PATH_IMAGE036
), as the formula (3).
Figure DEST_PATH_IMAGE037
（2）
Figure 765211DEST_PATH_IMAGE038
（3）
Set up its equation of linear regression according to formula (3):
Figure DEST_PATH_IMAGE039
（4）
In formula,
Figure 234239DEST_PATH_IMAGE040
,
Figure DEST_PATH_IMAGE041
, ,
Figure DEST_PATH_IMAGE043
,
Figure 362918DEST_PATH_IMAGE044
.Matrix form by formula (4)
Figure DEST_PATH_IMAGE045
Solve this regression equation, can obtain:
Figure 375873DEST_PATH_IMAGE046
（5）
In following formula:
Figure DEST_PATH_IMAGE047
Figure 320695DEST_PATH_IMAGE048
So obtain the rotating speed interval
Figure 735496DEST_PATH_IMAGE010
The load loss factor
Figure 740361DEST_PATH_IMAGE024
,
Figure 178296DEST_PATH_IMAGE025
.
2.2)
Figure DEST_PATH_IMAGE049
Obtain
Freely choose rotating speed in the every interval rotating speed of numerically-controlled machine, carry out
Figure 926809DEST_PATH_IMAGE033
Group (
Figure 196116DEST_PATH_IMAGE050
) different cutting experiments, measure corresponding
Figure 371883DEST_PATH_IMAGE017
With
Figure 297113DEST_PATH_IMAGE019
Value, substitution formula (6) is contained
Figure 583738DEST_PATH_IMAGE035
(
Figure DEST_PATH_IMAGE051
) system of equations of individual equation, as the formula (7).
Figure 973131DEST_PATH_IMAGE052
（6）
（7）
Set up its equation of linear regression according to formula (7):
Figure 60079DEST_PATH_IMAGE054
（8）
In formula,
Figure 534923DEST_PATH_IMAGE040
,
Figure DEST_PATH_IMAGE055
,
Figure 625239DEST_PATH_IMAGE056
.Press matrix form Solve this regression equation, can obtain:
（9）
In following formula:
So obtain the rotating speed interval
Figure 75680DEST_PATH_IMAGE010
The load loss factor
Figure 701834DEST_PATH_IMAGE026
.
2.3)
Figure 885691DEST_PATH_IMAGE021
,
Figure 255492DEST_PATH_IMAGE022
,
Figure 473984DEST_PATH_IMAGE011
Acquisition methods
Load loss factor and the driving-chain of same lathe is that the energy transfer chain is relevant.For the interval rotating speed lathe of the list of fixed conveyor chain, the load loss factor is constant, namely =
Figure 333355DEST_PATH_IMAGE059
2.4) foundation of load loss factor table function
For variable transmission chain lathes such as speed governing lathes between multi-region;
Figure DEST_PATH_IMAGE060
The driving-chain corresponding with each interval rotating speed is that the energy transfer chain is relevant, that is,
Figure 4508DEST_PATH_IMAGE058
=
Figure 974738DEST_PATH_IMAGE061
.
Figure 47736DEST_PATH_IMAGE061
Can set up by table function:
Table 2 load loss factor table function
Figure 15692DEST_PATH_IMAGE061
Figure DEST_PATH_IMAGE062
During actual use above table function, according to actual running speed
Figure 174141DEST_PATH_IMAGE063
The load loss factor is determined in corresponding rotating speed interval.
Embodiment:
Employing measures and calculates based on the model (II) of the power input process main transmission energy efficiency to C2-6136HK/1 lathe in machining axial workpiece (part shape and size are as shown in Figure 1) with two grades of rotating speeds (table 3).The power sensor EDA9033A that is used for the measurement power input is arranged on main motor porch, and the data sampling cycle is 20ms.Also by the torque sensor TQ201 that is arranged on cutting zone and the watt-hour meter that is arranged on the main transmission porch, obtained actual energy efficiency so that accuracy validation to be provided simultaneously.
Table 3 C2-6136HK/1 numerically controlled lathe parameter
Figure DEST_PATH_IMAGE064
1-1) basic function and basic coefficients obtains
As mentioned before, application model (II) is obtained the lathe energy efficiency, and the basic function and the basic coefficients that need to prepare comprise the no-load power function
Figure 27957DEST_PATH_IMAGE023
With load loss factor table function
Figure 893145DEST_PATH_IMAGE065
.
According to method mentioned above, choose some rotating speed points under each interval rotating speed, measure no-load power as shown in Figure 2, and simulate low or first gear no-load power function
Figure DEST_PATH_IMAGE066
With top gear no-load power function
Figure 94319DEST_PATH_IMAGE067
:
（10）
Figure 740064DEST_PATH_IMAGE069
（11）
, because the rotating speed of this numerically-controlled machine divides at a high speed and two grades of low speed, namely have two mechanical drive trains, so this lathe there are two groups of underlying parameter values: low or first gear (
Figure DEST_PATH_IMAGE070
) underlying parameter
Figure 379993DEST_PATH_IMAGE071
,
Figure DEST_PATH_IMAGE072
And top gear (
Figure 162004DEST_PATH_IMAGE073
) underlying parameter
Figure 471763DEST_PATH_IMAGE071
,
Figure 604804DEST_PATH_IMAGE072
.As stated above, measure respectively many groups at low or first gear and top gear With
Figure 720527DEST_PATH_IMAGE075
Value also measures in conjunction with above-mentioned
Figure DEST_PATH_IMAGE076
Value, the table function that simulates the additional load coefficient is as follows:
The additional load coefficient table function of table 4 embodiment
Figure 622624DEST_PATH_IMAGE077
1-2) on-site data monitoring and energy efficiency are calculated
On the basis that obtains above-mentioned basic function and basic coefficients, start the energy efficiency of the actual process of this workpiece is obtained.This process is used low or first gear work always, and procedure of processing and the technological parameter of this process are as shown in table 5.
Table 5 process process parameter table
Figure DEST_PATH_IMAGE078
Main transmission total power input in this military service process of Real-Time Monitoring
Figure 227918DEST_PATH_IMAGE017
, obtain whole military service process
Figure 785938DEST_PATH_IMAGE017
Curve synoptic diagram as shown in Figure 3.
As seen from Figure 3, have 4 processing periods in 12 periods of this military service process: (3), (5), (8), (11), namely
Figure 439774DEST_PATH_IMAGE079
.Calculate these 4 processing total available energy dissipations of period
Figure DEST_PATH_IMAGE080
Related data as shown in table 6.
Certain Machining of Shaft-type Parts sub-period efficiency data table related of table 6
Figure 196377DEST_PATH_IMAGE081
With data in table 6,
Figure DEST_PATH_IMAGE082
And whole process
Figure 175834DEST_PATH_IMAGE017
Value is substitution model (II) respectively, and the energy efficiency that obtains this process main transmission system of machine tool is
Figure 17888DEST_PATH_IMAGE083
.Obtain actual cut power and then obtain the actual total cutting energy consumption of this military service process by actual cut power and actual speed calculating that torque sensor records, directly measure this military service process actual total energy loss by watt-hour meter, thereby obtain the actual energy efficiency of this process
Figure DEST_PATH_IMAGE084
.With efficiency measuring and calculating value
Figure 475415DEST_PATH_IMAGE085
With the efficiency actual value
Figure 357963DEST_PATH_IMAGE001
Contrast, Error be
Figure DEST_PATH_IMAGE086
.
In addition, also can calculate arbitrary processing period by above-mentioned experimental data
Figure DEST_PATH_IMAGE088
The cutting energy consumption and the ratio of this period total energy consumption, namely process the period
Figure 572093DEST_PATH_IMAGE089
Energy efficiency.To use
Figure 833310DEST_PATH_IMAGE024
,
Figure 502188DEST_PATH_IMAGE025
The processing period of obtaining as design factor
Figure DEST_PATH_IMAGE090
Energy efficiency is designated as
Figure 557869DEST_PATH_IMAGE091
, will be designated as by the actual energy efficiency that corresponding measured value obtains .The actual efficiency of 4 processing periods in this military service process
Figure 436832DEST_PATH_IMAGE092
, the measuring and calculating efficiency
Figure 173844DEST_PATH_IMAGE091
And the measuring and calculating error is as shown in table 7.The actual efficiency that has also comprised whole process in table 7, measuring and calculating efficiency and measuring and calculating error.
Table 7 measuring and calculating efficiency and errors table thereof
Figure 759546DEST_PATH_IMAGE093
By as seen from Table 7, when a certain concrete processing period energy efficiency of measuring and calculating, there is certain error in model (II); But when the whole process energy efficiency of measuring and calculating, model (II) has degree of precision.Its reason has 2 points: the one, and the precision of prediction that the various stochastic errors in actual processing cause specifically processing the period descends, but all stochastic errors of all processing periods are cancelled out each other in whole military service process, make the efficiency estimation precision of whole military service process return to some extent; The 2nd, the ratio that the total energy consumption of all processing periods accounts for whole process total energy consumption is less, makes the measuring and calculating error of power consumption of polymer processing limited on the impact of efficiency measuring and calculating error.
Explanation is finally, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims (4)

1. the method obtained of the dynamo-electric main transmission energy efficiency of numerically-controlled machine process, is characterized in that, comprises the following steps:
Set up the dynamo-electric main transmission energy efficiency Model I of numerically-controlled machine process and II:
Figure 2012101278265100001DEST_PATH_IMAGE001
=
Figure 442492DEST_PATH_IMAGE002
（I）
=
Figure 2012101278265100001DEST_PATH_IMAGE003
（II）
Wherein, Model I is applicable to single interval rotating speed numerically-controlled machine, and modelⅱ is applicable to rotating speed numerically-controlled machine between multi-region; Refer to that there are a plurality of speed stages in some segmentation speed governing numerically-controlled machine between so-called multi-region, as high regime and low speed segment, each speed stage is a rotating speed interval, and the interval corresponding fixing driving-chain of rotating speed;
In formula, ,
Figure DEST_PATH_IMAGE005
For the load loss factor;
Figure 13915DEST_PATH_IMAGE006
For no-load power;
Figure DEST_PATH_IMAGE007
,
Figure 979597DEST_PATH_IMAGE008
,
Figure DEST_PATH_IMAGE009
For the rotating speed interval
Figure 348131DEST_PATH_IMAGE010
The load loss factor;
Figure DEST_PATH_IMAGE011
For no-load power;
Figure 475487DEST_PATH_IMAGE012
For processing period number;
Figure DEST_PATH_IMAGE013
Be
Figure DEST_PATH_IMAGE015
The time loss of individual processing period;
Time loss for the whole process of lathe;
Figure DEST_PATH_IMAGE017
Sequence number for the period;
M is the interval number of lathe rotating speed;
The disposable early-stage preparations of the basic function of model and basic coefficients specifically comprise:
A. the dynamo-electric main transmission no-load power of numerically-controlled machine process
Figure 751540DEST_PATH_IMAGE006
With rotating speed
Figure 53208DEST_PATH_IMAGE018
Relation function, comprise single interval rotating speed main transmission system of machine tool no-load power With rotating speed
Figure 738584DEST_PATH_IMAGE018
The single-relation curve, rotating speed main transmission system of machine tool no-load power between multi-region
Figure 796801DEST_PATH_IMAGE011
With rotating speed
Figure DEST_PATH_IMAGE019
About interval number Relation curve;
B. the additional load loss factor of single interval rotating speed main transmission system of machine tool ,
Figure 217921DEST_PATH_IMAGE004
,
Figure 329097DEST_PATH_IMAGE005
, and the additional load loss factor of rotating speed main transmission system of machine tool under each interval driving-chain between multi-region ,
Figure 993220DEST_PATH_IMAGE008
,
Figure 89352DEST_PATH_IMAGE009
Table function;
Only need in-site measurement numerically-controlled machine main transmission real-time power input process data or conditional curve in process during practical application
Figure DEST_PATH_IMAGE021
, then according to above-mentioned energy efficiency model, model basic function and basic coefficients, can calculate the dynamo-electric main transmission energy efficiency of machine tooling process .
2. the method obtained of the dynamo-electric main transmission energy efficiency of numerically-controlled machine process as claimed in claim 1, it is characterized in that, the acquisition methods of the no-load power of the dynamo-electric main transmission of numerically-controlled machine process and the relation function of rotating speed is: for single interval rotating speed lathe, choose some rotating speed points, do not cut at lathe under the prerequisite of object and start lathe and process rotating speed to this, measure the corresponding power input of lathe, record each rotating speed point
Figure 790778DEST_PATH_IMAGE018
The stationary value of lower power input is as the no-load power of lathe under this processing rotating speed
Figure 929635DEST_PATH_IMAGE006
, then simulate the relation function of no-load power and rotating speed; To rotating speed lathe between multi-region, repeat the no-load power surveying work of single interval rotating speed lathe under each rotating speed interval, then simulate no-load power
Figure 450746DEST_PATH_IMAGE011
With rotating speed
Figure 388877DEST_PATH_IMAGE019
About interval number
Figure 374151DEST_PATH_IMAGE010
Relation function.
3. the method obtained of the dynamo-electric main transmission energy efficiency of numerically-controlled machine process as claimed in claim 1, it is characterized in that, main transmission system of machine tool under machining state the additional load loss factor and the acquisition methods of table function be: for single interval rotating speed lathe,, by freely selecting rotating speed to carry out multiple different cutting experiment, measure corresponding
Figure 621593DEST_PATH_IMAGE021
With
Figure DEST_PATH_IMAGE023
Value is carried out regretional analysis, obtains one group of fixing load loss factor
Figure 879268DEST_PATH_IMAGE020
,
Figure 932674DEST_PATH_IMAGE004
,
Figure 710137DEST_PATH_IMAGE005
For rotating speed lathe between multi-region, carry out multiple different cutting experiment by freely select rotating speed under each rotating speed interval, measure corresponding
Figure 190797DEST_PATH_IMAGE021
With
Figure 192162DEST_PATH_IMAGE023
Value is carried out regretional analysis, obtains about rotating speed interval
Figure 49259DEST_PATH_IMAGE010
The load loss factor
Figure 681229DEST_PATH_IMAGE007
, ,
Figure 565057DEST_PATH_IMAGE009
Table function;
Figure 960266DEST_PATH_IMAGE021
With
Figure 446742DEST_PATH_IMAGE023
Be respectively numerically-controlled machine main transmission process any time
Figure DEST_PATH_IMAGE025
Power input and output power.
4. the dynamo-electric main transmission energy of numerically-controlled machine process dose-effect as claimed in claim 1; The method that rate is obtained, is characterized in that, described energy efficiency model Model I and II can also be reduced to respectively model III and IV:
Figure 223200DEST_PATH_IMAGE001
= （Ⅲ）
Figure 626816DEST_PATH_IMAGE001
= （Ⅳ）
In formula, a is the load loss factor.
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