CN105109094A - High-precision servo press fitting method based on computer - Google Patents
High-precision servo press fitting method based on computer Download PDFInfo
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- CN105109094A CN105109094A CN201510540591.6A CN201510540591A CN105109094A CN 105109094 A CN105109094 A CN 105109094A CN 201510540591 A CN201510540591 A CN 201510540591A CN 105109094 A CN105109094 A CN 105109094A
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- pressure
- value
- pressure head
- compacting
- setting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/26—Programme control arrangements
Abstract
The invention discloses a high-precision servo press fitting method based on a computer, and relates to the field of automation control. The collecting pressure is dynamically compensated according to collected pressure values and a pressure change trend, adaptive control is performed on an elastic workpiece by combining with a displacement sensor and a pressure sensor, therefore, the pressing accuracy and pressure control stability for the elastic workpiece are improved, the phenomenon that elastic workpiece pressing is unqualified due to the fact that in a traditional technology, the pressure is too large or the actual pressing pressure is slightly smaller cannot occur, and the workpiece quality is guaranteed; meanwhile, due to the fact that the influence of interfering data is greatly eliminated, the adaptability of the pressure control method in different processing environments can be guaranteed.
Description
Technical field
The present invention relates to automation control area, particularly relate to a kind of computer based high-precision servo pressing method.
Background technology
Servo-pressing machine is adopt servomotor to carry out the forcing press of drived control, and servomotor presses down process to forcing press and can play and control quick and feature flexibly.It is pressure and volume under pressure or displacement of pressing head that forcing press presses down parameter the most key in process, but, existing servo-pressing machine carries out compacting according to the pressure data collected and controls, and substantially the device or means that lack yet and monitor the whole pressure the strength and the displacement relation pressed down in process are not processed to the data gathered, the voltage-controlled existence of workpiece is caused to postpone high, low-response, pressure acquisition is inaccurate, the shortcoming that adaptive capacity is poor and stability is not high, namely quantification monitoring entirety being pressed down to process is lacked, cannot judge that whether the amount of pressure in process is normal like this, whether whole process is normal, weaken the ability of servo-pressing machine to machining accuracy and quality control.
For the flexible workpiece that can be out of shape, the compacting difficulty of it being carried out to specification is very large, because workpiece band itself is flexible, therefore very easily occurs suppressing the situations such as not in place, has influence on the machining accuracy of elastic deformation workpiece.In recent years, although pressure detecting is constantly ripe in theory, but in the measurement of reality with in controlling, how ensureing force samples real-time fast, how ensureing that elastic workpiece carries out Based Intelligent Control to obtain desirable articles according to the pressure data gathered is problem anxious to be resolved.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide and a kind ofly accurately can controls according to the pressure collected and have the workpiece high-precision servo pressing method of higher stability.
For achieving the above object, the invention provides a kind of computer based high-precision servo pressing method, below the depression bar of digitally-controlled press machine, be provided with pressure sensor, the first signal input part of the output connection handling device of described pressure sensor; Second input of described processor is connected with the output of displacement transducer; Described processor is bi-directionally connected the first wireless signal transceiver module; Described first wireless signal transceiver module and the second wireless signal transceiver module carry out data transmission by wireless signal, and described second wireless signal transceiver module is bi-directionally connected computer; First signal output part of described processor connects the control signal input of servomotor; The secondary signal output of described processor is also connected with the input of audible-visual annunciator;
Computer based high-precision servo pressing method performs according to the following steps:
Step one, carry out optimum configurations; This parameter comprises pressing pressure standard value, the first pressure set points, the second pressure set points, the first setting shift value, the second setting shift value, the 3rd setting shift value, compacting shift standards value, work entrance pressure power alarming value, pressure head retrogressing setting value, pressure head advance setting value, compacting dwell time alarming value, dwell pressure higher limit and dwell pressure lower limit;
After step 2, processor receive the signal of computer transmission, control servomotor and drive depression bar motion, depression bar drives the downward work of pressure head of digitally-controlled press machine to enter by pressure sensor;
The force value collected is sent to computer by processor by described pressure sensor; The shift value of the pressure head collected is sent to computer by processor by institute's displacement sensors;
Step 3, described computer compensate the pressing pressure value collected, and described computer is according to the difference compensating rear pressing pressure value, sends a signal to described processor, make described processor control the shift value of pressure head compacting different distance:
When the pressing pressure value after compensating is less than or equal to the first pressure set points, pressure head compacting distance is the first setting shift value; When the pressing pressure value after compensating is greater than the first pressure set points and is less than or equal to the second pressure set points, pressure head compacting distance is the second setting shift value; When the pressing pressure value after compensating is greater than the second pressure set points, pressure head compacting distance is the 3rd setting shift value;
Step 4, judge whether the shift value of pressure head arrives compacting shift standards value; When the shift value of pressure head arrives compacting shift standards value, perform step 5; When the shift value of pressure head does not arrive compacting shift standards value, return execution step 3;
Step 5, depression bar drive the pressure head of digitally-controlled press machine to carry out pressurize by pressure sensor;
When at packing stage, when the pressing pressure of pressure head is greater than dwell pressure higher limit, pressure head retreats, and the distance that pressure head retreats is that pressure head retreats setting value, then performs step 6; When at packing stage, when the pressing pressure of pressure head is less than dwell pressure lower limit, pressure head presses down, and the distance that pressure head presses down is pressure head advance setting value, then performs step 6; Otherwise continue to perform step 5;
Step 6, judge the pressure head dwell time whether exceed compacting dwell time alarming value;
When the pressure head dwell time exceedes compacting dwell time alarming value, pressure head retreats with the compacting stopped workpiece, and simultaneous computer sends a signal to described processor, and described processor exports control signal and reports to the police to described audible-visual annunciator;
When the pressure head dwell time does not exceed compacting dwell time alarming value, return execution step 5;
Computer described in step 3 compensates the pressing pressure value collected and performs according to the following steps:
The pressing pressure value that S1, setting collect is Q
t, described t is positive integer;
S2, acquisition effective pressure ordered series of numbers;
Setting effective judgment value is P
a, setting judgment threshold is R; Calculate P
a=Q
a-Q
a-1obtain P
a; Judge whether P
a>=R, works as P
aduring>=R, by Q
adelete; Work as P
aduring < R, by Q
astored in effective pressure ordered series of numbers; 2≤a≤t and a is integer; Described R > 0; Set described effective pressure ordered series of numbers as { M
b, described b is positive integer;
S3, calculating pressure compensating parameter;
Setting described pressure compensation parameter is N
c, calculate
obtain pressure compensation Parameter N
c; Described M
c∈ { M
band c>=3, c are integer;
S4, to { M
ccompensate;
Pressing pressure value after setting compensation is Z
c, calculate
Pressing pressure value Z after being compensated
c.
Adopt above technical scheme, filtering is carried out to the force value collected, effectively can overcome the fluctuation interference that accidental factor causes, for follow-up data processing provides pressure acquisition unit value accurately.Then by calculating pressure compensating parameter, the force value collected is compensated, the pressure divergence collected due to traditional servo-pressing machine is large and dynamic response is poor, the trend of pressure change is lacked and considers, therefore must compensate pressure, the pressure compensation parameter adopting the technical program to obtain and compensation way, can compensate collection pressure according to the force value collected and pressure trend dynamically, make servo-pressing machine can accurate anticipation pressure regulated quantity, to carry out adaptive compacting to elastic workpiece, improve the compacting accuracy for elastic workpiece and pressure controlled stability, there will not be the excessive or actual pressing pressure of the pressure in traditional handicraft slightly little cause elastic workpiece suppress defective, ensure that the quality of workpiece, simultaneously owing to largely eliminating the impact of interfering data, ensure that the adaptability of this compress control method at different processing environment.Simultaneously, the technical program allows servo-pressing machine be undertaken alternately by wireless signal and host computer, to realize data acquisition and Stress control, is more applicable to far distance controlled and the data collection and analysis of integrated mill, improve the compacting efficiency of elastic workpiece, reduce human cost.The present invention is by comparing setting value and actual value, solve the uniformity of force displacement curve and default curve, the problem that after above scheme solves in original production process and locates inaccuracy, press-in, workpiece rebounds, according to different gaps, different roughness, different hardness automatic pressure regulation, speed and the magnitude of interference, can ensure that positioning precision is accurately stable.
The invention has the beneficial effects as follows: the present invention can compensate collection pressure according to the force value collected and die pressure variation tendency dynamically, make servo-pressing machine can accurate anticipation pressure regulated quantity, to carry out adaptive compacting to elastic workpiece, improve the compacting accuracy for elastic workpiece and pressure controlled stability, there will not be the excessive or actual pressing pressure of the pressure in traditional handicraft slightly little cause elastic workpiece suppress defective, ensure that the quality of workpiece, simultaneously owing to largely eliminating the impact of interfering data, ensure that the adaptability of this compress control method at different processing environment, be adapted to the force value sampling that situation that elastic workpiece easily rebounds causes especially inaccurate.The invention solves the uniformity of force displacement curve and default curve, the problem that after above scheme solves in original production process and locates inaccuracy, press-in, workpiece rebounds, according to different gaps, different roughness, different hardness automatic pressure regulation, speed and the magnitude of interference, can ensure that positioning precision is accurately stable.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of the forcing press elastic deformation workpiece compacting control system of the embodiment of the invention.
Fig. 2 is the schematic flow sheet of the embodiment of the invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, a kind of computer based forcing press elastic deformation workpiece compact system, comprises the pressure sensor 1 be arranged on below digitally-controlled press machine depression bar, the first signal input part of the output connection handling device 2 of described pressure sensor 1; Second input of described processor 2 is connected with the output of displacement transducer 8; Described processor 2 is bi-directionally connected the first wireless signal transceiver module 3; Described first wireless signal transceiver module 3 and the second wireless signal transceiver module 6 carry out data transmission by wireless signal, and described second wireless signal transceiver module 6 is bi-directionally connected computer 5; First signal output part of described processor 2 connects the control signal input of servomotor 4; The secondary signal output of described processor 2 is also connected with the input of audible-visual annunciator 7.
As shown in Figure 2, a kind of computer based high-precision servo pressing method, performs according to the following steps:
Step one, carry out optimum configurations; This parameter comprises pressing pressure standard value, the first pressure set points, the second pressure set points, the first setting shift value, the second setting shift value, the 3rd setting shift value, compacting shift standards value, work entrance pressure power alarming value, pressure head retrogressing setting value, pressure head advance setting value, compacting dwell time alarming value, dwell pressure higher limit and dwell pressure lower limit.
After step 2, processor 2 receive the signal of computer 5 transmission, control servomotor 4 and drive depression bar to move, depression bar drives the downward work of the pressure head of digitally-controlled press machine to enter by pressure sensor 1.
The force value collected is sent to computer 5 by processor 2 by described pressure sensor 1; The shift value of the pressure head collected is sent to computer 5 by processor 2 by institute's displacement sensors 8.
Step 3, described computer 5 compensate the pressing pressure value collected, and described computer 5 is according to the difference compensating rear pressing pressure value, sends a signal to described processor 2, make described processor 2 control the shift value of pressure head compacting different distance:
When the pressing pressure value after compensating is less than or equal to the first pressure set points, pressure head compacting distance is the first setting shift value; When the pressing pressure value after compensating is greater than the first pressure set points and is less than or equal to the second pressure set points, pressure head compacting distance is the second setting shift value; When the pressing pressure value after compensating is greater than the second pressure set points, pressure head compacting distance is the 3rd setting shift value.
Step 4, judge whether the shift value of pressure head arrives compacting shift standards value; When the shift value of pressure head arrives compacting shift standards value, perform step 5; When the shift value of pressure head does not arrive compacting shift standards value, return execution step 3.
Step 5, depression bar drive the pressure head of digitally-controlled press machine to carry out pressurize by pressure sensor 1.
When at packing stage, when the pressing pressure of pressure head is greater than dwell pressure higher limit, pressure head retreats, and the distance that pressure head retreats is that pressure head retreats setting value, then performs step 6; When at packing stage, when the pressing pressure of pressure head is less than dwell pressure lower limit, pressure head presses down, and the distance that pressure head presses down is pressure head advance setting value, then performs step 6; Otherwise continue to perform step 5.
Step 6, judge the pressure head dwell time whether exceed compacting dwell time alarming value;
When the pressure head dwell time exceedes compacting dwell time alarming value, pressure head retreats with the compacting stopped workpiece, and simultaneous computer 5 sends a signal to described processor 2, and described processor 2 exports control signal and reports to the police to described audible-visual annunciator 7.
When the pressure head dwell time does not exceed compacting dwell time alarming value, return execution step 5;
Computer 5 described in step 3 compensates the pressing pressure value collected and performs according to the following steps:
The pressing pressure value that S1, setting collect is Q
t, described t is positive integer;
S2, acquisition effective pressure ordered series of numbers;
Setting effective judgment value is P
a, setting judgment threshold is R; Calculate P
a=Q
a-Q
a-1obtain P
a; Judge whether P
a>=R, works as P
aduring>=R, by Q
adelete; Work as P
aduring < R, by Q
astored in effective pressure ordered series of numbers; 2≤a≤t and a is integer; Described R > 0; Set described effective pressure ordered series of numbers as { M
b, described b is positive integer.At least gather in described effective pressure ordered series of numbers and have 4 effective pressure values; Force value in described effective pressure ordered series of numbers is by acquisition order arrangement, and first the effective pressure value collected is M
1, second virtual value collected is M
2... b the effective pressure value collected is M
b.This programme gathers pressure Q from second
2the mutation pressure data that namely starting excludes the interference signal causes, the filtering impact of environment, ensure that data precision and the validity of collection.
S3, calculating pressure compensating parameter;
Setting described pressure compensation parameter is N
c, calculate
obtain pressure compensation Parameter N
c; Described M
c∈ { M
band c>=3, c are integer;
S4, to { M
ccompensate;
Pressing pressure value after setting compensation is Z
c, calculate
Pressing pressure value Z after being compensated
c.
In above scheme, work as M
c-1-M
c-2> 0 and M
c-M
c-1> 0, then workpiece pressing pressure is for continuing the rising stage, works as M
c-1-M
c-2> 0 and M
c-M
c-1< 0, then the influenced decline of workpiece pressing pressure, works as M
c-1-M
c-2< 0 and M
c-M
c-1< 0, then workpiece pressing pressure is the continuous decrease phase, works as M
c-1-M
c-2< 0 and M
c-M
c-1> 0, then the influenced rising of workpiece pressing pressure, works as M
c-1-M
c-2=0 or M
c-M
c-1when=0, workpiece pressing pressure is in stationary phase.Above scheme is in different trend according to workpiece pressing pressure, takes corresponding compensation way, and what avoid mistake carries out pressure compensation, improves workpiece compacting precision, can carry out voltage-controlled dynamically, ensure the quality of foundry goods in the process-cycle.
The pressure compensation parameter of this programme and compensation way can reflect the variation tendency of die pressure, the mutation pressure of servo-pressing machine due to filtering effective before compensation, effectively avoid the trend anticipation mistake that mutation pressure value causes, can pressure change greatly or pressure change in little delicate workpieces processing technology all there is higher pressure control accuracy, the compensation way of this programme is become a reality.
The present invention can accurate anticipation pressure regulated quantity, and according to die pressure variation tendency, collection pressure is compensated, then computer send control signal make processor control servo-pressing machine adaptability compacting is carried out to elastic workpiece, improve compacting accuracy and pressure controlled stability, ensure that the compacting quality of elastic workpiece, simultaneously owing to largely eliminating the impact of interfering data, ensure that the adaptability of this compress control method at different processing environment.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a computer based high-precision servo pressing method, pressure sensor (1) is provided with, the first signal input part of the output connection handling device (2) of described pressure sensor (1) below the depression bar of digitally-controlled press machine; It is characterized in that: the second input of described processor (2) is connected with the output of displacement transducer (8); Described processor (2) is bi-directionally connected the first wireless signal transceiver module (3); Described first wireless signal transceiver module (3) and the second wireless signal transceiver module (6) carry out data transmission by wireless signal, and described second wireless signal transceiver module (6) is bi-directionally connected computer (5); First signal output part of described processor (2) connects the control signal input of servomotor (4); The secondary signal output of described processor (2) is also connected with the input of audible-visual annunciator (7);
Perform according to the following steps:
Step one, carry out optimum configurations; This parameter comprises pressing pressure standard value, the first pressure set points, the second pressure set points, the first setting shift value, the second setting shift value, the 3rd setting shift value, compacting shift standards value, work entrance pressure power alarming value, pressure head retrogressing setting value, pressure head advance setting value, compacting dwell time alarming value, dwell pressure higher limit and dwell pressure lower limit;
After step 2, processor (2) receive the signal that computer (5) sends, control servomotor (4) and drive depression bar motion, depression bar drives the downward work of pressure head of digitally-controlled press machine to enter by pressure sensor (1);
The force value collected is sent to computer (5) by processor (2) by described pressure sensor (1); The shift value of the pressure head collected is sent to computer (5) by processor (2) by institute's displacement sensors (8);
Step 3, described computer (5) compensate the pressing pressure value collected, and described computer (5) is according to the difference compensating rear pressing pressure value, send a signal to described processor (2), make described processor (2) control the shift value of pressure head compacting different distance:
When the pressing pressure value after compensating is less than or equal to the first pressure set points, pressure head compacting distance is the first setting shift value; When the pressing pressure value after compensating is greater than the first pressure set points and is less than or equal to the second pressure set points, pressure head compacting distance is the second setting shift value; When the pressing pressure value after compensating is greater than the second pressure set points, pressure head compacting distance is the 3rd setting shift value;
Step 4, judge whether the shift value of pressure head arrives compacting shift standards value; When the shift value of pressure head arrives compacting shift standards value, perform step 5; When the shift value of pressure head does not arrive compacting shift standards value, return execution step 3;
Step 5, depression bar drive the pressure head of digitally-controlled press machine to carry out pressurize by pressure sensor (1);
When at packing stage, when the pressing pressure of pressure head is greater than dwell pressure higher limit, pressure head retreats, and the distance that pressure head retreats is that pressure head retreats setting value, then performs step 6; When at packing stage, when the pressing pressure of pressure head is less than dwell pressure lower limit, pressure head presses down, and the distance that pressure head presses down is pressure head advance setting value, then performs step 6; Otherwise continue to perform step 5;
Step 6, judge the pressure head dwell time whether exceed compacting dwell time alarming value;
When the pressure head dwell time exceedes compacting dwell time alarming value, pressure head retreats with the compacting stopped workpiece, simultaneous computer (5) sends a signal to described processor (2), and described processor (2) exports control signal and reports to the police to described audible-visual annunciator (7);
When the pressure head dwell time does not exceed compacting dwell time alarming value, return execution step 5;
Computer described in step 3 (5) compensates the pressing pressure value collected and performs according to the following steps:
The pressing pressure value that S1, setting collect is Q
t, described t is positive integer;
S2, acquisition effective pressure ordered series of numbers;
Setting effective judgment value is P
a, setting judgment threshold is R; Calculate P
a=Q
a-Q
a-1obtain P
a; Judge whether P
a>=R, works as P
aduring>=R, by Q
adelete; Work as P
aduring < R, by Q
astored in effective pressure ordered series of numbers; 2≤a≤t and a is integer; Described R > 0; Set described effective pressure ordered series of numbers as { M
b, described b is positive integer;
S3, calculating pressure compensating parameter;
Setting described pressure compensation parameter is N
c, calculate
obtain pressure compensation Parameter N
c; Described M
c∈ { M
band c>=3, c are integer;
S4, to { M
ccompensate;
Pressing pressure value after setting compensation is Z
c, calculate
Pressing pressure value Z after being compensated
c.
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|---|---|---|---|
| CN201510540591.6A CN105109094B (en) | 2015-08-28 | 2015-08-28 | Computer based high-precision servo pressing method |
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|---|---|---|---|
| CN201510540591.6A CN105109094B (en) | 2015-08-28 | 2015-08-28 | Computer based high-precision servo pressing method |
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| CN105109094A true CN105109094A (en) | 2015-12-02 |
| CN105109094B CN105109094B (en) | 2016-11-30 |
Family
ID=54657307
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|---|---|---|---|
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| CN106843175A (en) * | 2017-02-20 | 2017-06-13 | 上海天沐自动化仪表有限公司 | A kind of intelligent press mounting system based on high-end manufacture Yu process monitoring |
| CN107553954A (en) * | 2017-09-13 | 2018-01-09 | 北京华信佳音医疗科技发展有限责任公司 | A kind of system and device by collagen extrusion forming |
| CN108072401A (en) * | 2016-11-14 | 2018-05-25 | 山东理工大学 | A kind of press force energy parametric measurement device and method |
| CN109404388A (en) * | 2018-11-02 | 2019-03-01 | 格力电器（武汉）有限公司 | A kind of pressing tool |
| CN110181850A (en) * | 2019-06-05 | 2019-08-30 | 合肥旺和电子科技有限公司 | High speed sheeting system and its control method for pharmaceutical equipment |
| CN110385882A (en) * | 2019-06-17 | 2019-10-29 | 国网湖南省电力有限公司 | ZnO powder crimps molding machine |
| CN112524121A (en) * | 2019-09-18 | 2021-03-19 | 上海禾之木工业设备有限公司 | On-line monitoring system based on servo hydraulic system |
| CN114042813A (en) * | 2021-10-09 | 2022-02-15 | 浙江威罗德汽配股份有限公司 | Compound end cone forming system based on vehicle exhaust |
| CN115582791A (en) * | 2022-09-15 | 2023-01-10 | 佛山市增广智能科技有限公司 | Precision force-controlled self-locating assembly method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110385882A (en) * | 2019-06-17 | 2019-10-29 | 国网湖南省电力有限公司 | ZnO powder crimps molding machine |
| CN110385882B (en) * | 2019-06-17 | 2021-07-23 | 国网湖南省电力有限公司 | Zinc oxide powder compression molding device |
| CN112524121A (en) * | 2019-09-18 | 2021-03-19 | 上海禾之木工业设备有限公司 | On-line monitoring system based on servo hydraulic system |
| CN112524121B (en) * | 2019-09-18 | 2022-09-23 | 上海禾之木工业设备有限公司 | On-line monitoring system based on servo hydraulic system |
| CN114042813A (en) * | 2021-10-09 | 2022-02-15 | 浙江威罗德汽配股份有限公司 | Compound end cone forming system based on vehicle exhaust |
| CN114042813B (en) * | 2021-10-09 | 2022-07-01 | 浙江威罗德汽配股份有限公司 | Compound end cone forming system based on vehicle exhaust |
| CN115582791A (en) * | 2022-09-15 | 2023-01-10 | 佛山市增广智能科技有限公司 | Precision force-controlled self-locating assembly method |
| CN115582791B (en) * | 2022-09-15 | 2023-05-16 | 佛山市增广智能科技有限公司 | Precise force control self-locating assembly method |
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| CN105109094B (en) | 2016-11-30 |
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