CN102320157A - Control method of servo press - Google Patents
Control method of servo press Download PDFInfo
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- CN102320157A CN102320157A CN201110231330A CN201110231330A CN102320157A CN 102320157 A CN102320157 A CN 102320157A CN 201110231330 A CN201110231330 A CN 201110231330A CN 201110231330 A CN201110231330 A CN 201110231330A CN 102320157 A CN102320157 A CN 102320157A
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- dead centre
- punching press
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Abstract
The invention relates to a control method of a servo press, and in particular to a bottom dead centre control method of the servo machine. The control method comprises a bottom dead centre reading and identification module, a comparison module and a threshold value module, wherein the bottom dead centre reading and identification module is used for identifying continuous signals in each work cycle period which are detected by a sliding block displacement sensor, and reading a bottom dead centre position value in the current cycle period; the comparison module is used for comparing a current bottom dead centre position value with a system setting value, and calculating an offset of the bottom dead centre; the threshold value module is used for comparing the current bottom dead centre offset of a sliding block with a given threshold value, if the bottom dead centre offset is greater than the given threshold value, the system starts a mould adjusting system to adjust the sliding block to a commanded bottom dead centre. The invention provides the control method of the servo press which can automatically adjust the bottom dead centre of the sliding block, and can satisfy work requirements for precision punching of the press.
Description
Technical field
The present invention relates to a kind of servo-pressing machine control method, the method for particularly servo-pressing machine being controlled can automatically adjust to servo-pressing machine slide block bottom dead centre, satisfies the job requirement of forcing press precision stamping.
Background technology
In plate stamping processing; The precision of workpiece is except receiving Sheet Metal Forming Technology and diel influence, and also receives the influence by caused by factors such as forcing press machinery structure, material behavior, slider guide, cooling and lubricating and control mode such as rigidity and heat endurance equal pressure machine combination property.Press ram bottom dead centre precision then is the direct embodiment of forcing press combination property.
In punch process, usually receive the influence of drawing velocity and operating temperature, make the slide block bottom dead centre produce bigger drift, cause the stamping parts precision to reduce greatly, even damage machine tool and work mould.In order to guarantee that punch process normally carries out, must shut down every now and then and detect the displacement of slide block bottom dead centre, artificial the slide block lower dead point position is adjusted, influence production efficiency and crudy greatly.
In order to improve press ram bottom dead centre operating accuracy, people have taked many technical measures from reducing two aspects of press motion parts inertia force and thermal deformation, as:
1) the height of packing compact governor motion is arranged in entablature, has fallen gently the quality of moving component, thereby reduced the inertia force of system;
2) adopt multi-connecting-rod mechanism, reduce near the acceleration of slide block bottom dead centre, to reduce the inertia force that this place produces;
3) adopt the light-high-strength sliding block material, reduce the motion inertia force that slide block produces;
4) lubricating oil is freezed or add thermal control, the bottom dead centre precision is influenced to reduce the frame for movement thermal deformation;
5) adopt symmetrical transmission mechanism, the thermal deformation in the course of work is cancelled each other.
In these prior aries, do not see the control technology that adopts control method that the slide block bottom dead centre is automatically adjusted as yet.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, a kind of servo-pressing machine control method that the slide block bottom dead centre is automatically adjusted is provided, satisfy the job requirement of forcing press precision stamping.
Bottom dead centre control method of the present invention; In mode transfer SERVO CONTROL subsystem, include bottom dead centre and read discrimination module, comparison module and threshold threshold module: the slider displacement continuous signal that bottom dead centre reads in each punching press SERVO CONTROL dust cycle that discrimination module detected the slider displacement sensor is differentiated, and reads lower dead point position value in the current cycle period; Comparison module is that the current lower dead point position value and the default value that are read are compared, and calculates current slide bottom dead centre side-play amount; The threshold threshold module is responsible for current slide bottom dead centre side-play amount and the threshold threshold ratio that sets, if the bottom dead centre side-play amount is greater than the threshold threshold value of setting, system's starting mode transfer SERVO CONTROL subsystem is adjusted to the instruction lower dead point position with slide block.
Said mode transfer SERVO CONTROL subsystem is made up of mode transfer servo-driver, mode transfer servomotor and slider displacement sensor; When mode transfer instruction or the slide block bottom dead centre that receives the control system when the mode transfer servo-driver departs from the location of instruction, will drive the mode transfer motor and rotate, and make the slide block bottom dead centre adjust to the location of instruction through reducing gear.
The photoelectric encoder that the present invention self is provided by the mode transfer servomotor detects feedback to the angular speed of mode transfer servomotor output shaft; The slider displacement signal that is detected by the slider displacement sensor feeds back the current lower dead point position of system, constitutes the full cut-off ring control of mode transfer control servo-drive subsystem.
The present invention is provided with a mode transfer switch with third gear in the control system, i.e. left side shelves, middle bay and right shelves: when the mode transfer switch is positioned at middle shelves, do not carry out the mode transfer operation; When being positioned at left side shelves, be used to set the mode transfer operation of new bottom dead centre; When being positioned at right grade, the automatic mold-adjustment operation when being used for the drift of slide block bottom dead centre.
When mode transfer SERVO CONTROL subsystem of the present invention carries out the automatic mold-adjustment operation; Be to detect and to read the current lower dead point position of slide block when bent axle is positioned at 180 °, or the maximum that in an operation cycle, is detected through the slider displacement sensor or minimum of a value are as current lower dead point position through being fixed on photoelectric encoder on the bent axle.
Punching press SERVO CONTROL subsystem of the present invention comprises punching press servo-driver, punching press servomotor and is fixed on the photoelectric encoder on the bent axle; Receive the work order rear drive punching press servomotor rotation of control system when the punching press servo-driver; Give slide block through transmission system with the motion and the transmission of power of punching press servomotor, driving sliding block realizes ramming motion up and down.
To be the photoelectric encoder that self provided by the punching press servomotor detect feedback to the angular speed of punching press servomotor output shaft to described punching press SERVO CONTROL subsystem; The photoelectric encoder that is fixed on the bent axle carries out position feedback to the angular displacement of bent axle, thereby constitutes the full cut-off ring control of punching press SERVO CONTROL subsystem.
Characteristics of the present invention are: through the slider displacement sensor punching press SERVO CONTROL subsystem in the servo-pressing machine control system and mode transfer SERVO CONTROL subsystem are effectively connected; Can be at any time with any working condition under to the forcing press bottom dead centre displacement monitor in real time and regulate automatically; Guarantee forcing press punching precision and pressing product quality, improved punch process efficient; Be provided with through third gear mode transfer switch, make things convenient for system to implement the slide block bottom dead centre and regulate automatically and new product mode transfer operation.
Description of drawings
Fig. 1 is control principle figure of the present invention.
Fig. 2 is a mode transfer operation process chart of the present invention.
The specific embodiment
Bottom dead centre control method of the present invention; In mode transfer SERVO CONTROL subsystem, include bottom dead centre and read discrimination module, comparison module and threshold threshold module: the slider displacement continuous signal that bottom dead centre reads in each punching press SERVO CONTROL dust cycle that discrimination module detected the slider displacement sensor is differentiated, and reads lower dead point position value in the current cycle period; Comparison module is that the current lower dead point position value and the default value that are read are compared, and calculates current slide bottom dead centre side-play amount; The threshold threshold module is responsible for current slide bottom dead centre side-play amount and the threshold threshold ratio that sets, if the bottom dead centre side-play amount is greater than the threshold threshold value of setting, system's starting mode transfer SERVO CONTROL subsystem is adjusted to the instruction lower dead point position with slide block.
Said mode transfer SERVO CONTROL subsystem is made up of mode transfer servo-driver, mode transfer servomotor and slider displacement sensor; When mode transfer instruction or the slide block bottom dead centre that receives the control system when the mode transfer servo-driver departs from the location of instruction, will drive the mode transfer motor and rotate, and make the slide block bottom dead centre adjust to the location of instruction through reducing gear.
The photoelectric encoder that the present invention self is provided by the mode transfer servomotor detects feedback to the angular speed of mode transfer servomotor output shaft; The slider displacement signal that is detected by the slider displacement sensor feeds back the current lower dead point position of system, constitutes the full cut-off ring control of mode transfer control servo-drive subsystem.
The present invention is provided with a mode transfer switch with third gear in the control system, i.e. left side shelves, middle bay and right shelves: when the mode transfer switch is positioned at middle shelves, do not carry out the mode transfer operation; When being positioned at left side shelves, be used to set the mode transfer operation of new bottom dead centre; When being positioned at right grade, the automatic mold-adjustment operation when being used for the drift of slide block bottom dead centre.
When mode transfer SERVO CONTROL subsystem of the present invention carries out the automatic mold-adjustment operation; Be to detect and to read the current lower dead point position of slide block when bent axle is positioned at 180 °, or the maximum that in an operation cycle, is detected through the slider displacement sensor or minimum of a value are as current lower dead point position through being fixed on photoelectric encoder on the bent axle.
Punching press SERVO CONTROL subsystem of the present invention comprises punching press servo-driver, punching press servomotor and is fixed on the photoelectric encoder on the bent axle; Receive the work order rear drive punching press servomotor rotation of control system when the punching press servo-driver; Give slide block through transmission system with the motion and the transmission of power of punching press servomotor, driving sliding block realizes ramming motion up and down.
To be the photoelectric encoder that self provided by the punching press servomotor detect feedback to the angular speed of punching press servomotor output shaft to described punching press SERVO CONTROL subsystem; The photoelectric encoder that is fixed on the bent axle carries out position feedback to the angular displacement of bent axle, thereby constitutes the full cut-off ring control of punching press SERVO CONTROL subsystem.
Claims (7)
1. servo-pressing machine control method; Comprise punching press SERVO CONTROL subsystem and mode transfer SERVO CONTROL subsystem; It is characterized in that; Mode transfer SERVO CONTROL subsystem includes bottom dead centre and reads discrimination module, comparison module and threshold threshold module: the slider displacement continuous signal that bottom dead centre reads in each punching press SERVO CONTROL dust cycle that discrimination module detected the slider displacement sensor is differentiated, and reads lower dead point position value in the current cycle period; Comparison module is that the current lower dead point position value and the default value that are read are compared, and calculates current slide bottom dead centre side-play amount; The threshold threshold module is responsible for current slide bottom dead centre side-play amount and the threshold threshold ratio that sets, if the bottom dead centre side-play amount is greater than the threshold threshold value of setting, system's starting mode transfer servo-control system is adjusted to the instruction lower dead point position with slide block.
2. servo-pressing machine control method according to claim 1 is characterized in that, said mode transfer SERVO CONTROL subsystem is made up of mode transfer servo-driver, mode transfer servomotor and slider displacement sensor; When mode transfer instruction or the slide block bottom dead centre that receives the control system when the mode transfer servo-driver departs from the location of instruction, will drive the mode transfer motor and rotate, and make the slide block bottom dead centre adjust to the location of instruction through reducing gear.
3. servo-pressing machine control method according to claim 2; It is characterized in that; The photoelectric encoder that the mode transfer servomotor provides self detects feedback to the angular speed of mode transfer servomotor output shaft; The slider displacement signal that is detected by the slider displacement sensor feeds back the current lower dead point position of system, constitutes the full cut-off ring control of mode transfer control servo-drive subsystem.
4. servo-pressing machine control method according to claim 1 is characterized in that, a mode transfer switch with third gear is set in the control system, i.e. left side shelves, middle bay and right shelves: when the mode transfer switch is positioned at middle shelves, do not carry out the mode transfer operation; When being positioned at left side shelves, be used to set the mode transfer operation of new bottom dead centre; When being positioned at right grade, the automatic mold-adjustment operation when being used for the drift of slide block bottom dead centre.
5. servo-pressing machine control method according to claim 4; It is characterized in that; When mode transfer SERVO CONTROL subsystem carries out the automatic mold-adjustment operation; Be to detect and to read the current lower dead point position of slide block when bent axle is positioned at 180 °, or the maximum that in an operation cycle, is detected through the slider displacement sensor or minimum of a value are as current lower dead point position through being fixed on photoelectric encoder on the bent axle.
6. servo-pressing machine control method according to claim 1; It is characterized in that; Described punching press SERVO CONTROL subsystem comprises punching press servo-driver, punching press servomotor and is fixed on the photoelectric encoder on the bent axle; The work order rear drive punching press servomotor that receives the control system when the punching press servo-driver rotates, and gives slide block through transmission system with the motion and the transmission of power of punching press servomotor, and driving sliding block realizes ramming motion up and down.
7. servo-pressing machine control method according to claim 6; It is characterized in that; To be the photoelectric encoder that self provided by the punching press servomotor detect feedback to the angular speed of punching press servomotor output shaft to described punching press SERVO CONTROL subsystem; The photoelectric encoder that is fixed on the bent axle carries out position feedback to the angular displacement of bent axle, thereby constitutes the full cut-off ring control of punching press SERVO CONTROL subsystem.
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| CN201110231330A CN102320157A (en) | 2011-08-12 | 2011-08-12 | Control method of servo press |
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| CN201110231330A CN102320157A (en) | 2011-08-12 | 2011-08-12 | Control method of servo press |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909884A (en) * | 2012-10-25 | 2013-02-06 | 金丰（中国）机械工业有限公司 | Device and method for compensating position error of lower dead point of punching machine |
| CN103660361A (en) * | 2013-12-11 | 2014-03-26 | 南京航空航天大学 | Control system for servo press |
| CN104190837A (en) * | 2014-07-17 | 2014-12-10 | 奚进洲 | Method and device for monitoring running state of cold header |
| CN105700453A (en) * | 2016-01-22 | 2016-06-22 | 扬力集团股份有限公司 | Control system and method for intelligent-type servo press |
| CN109719160A (en) * | 2019-01-16 | 2019-05-07 | 佛山市传恒机电制造有限公司 | Stamping press balance detecting device, method and punching machine |
| CN110509595A (en) * | 2019-08-07 | 2019-11-29 | 浙江锋源氢能科技有限公司 | A kind of press ram bottom dead center position precision detection system |
| CN110524942A (en) * | 2019-08-02 | 2019-12-03 | 南京农业大学 | A kind of press machine bottom dead centre method of adjustment and system |
| CN110561822A (en) * | 2019-08-29 | 2019-12-13 | 山东省科学院激光研究所 | Servo press bottom dead center deviation motor command automatic compensation method |
| CN110561821A (en) * | 2019-08-29 | 2019-12-13 | 山东省科学院激光研究所 | Servo press bottom dead center deviation feedback compensation method |
| CN112484626A (en) * | 2020-11-18 | 2021-03-12 | 浙江万丰奥威汽轮股份有限公司 | Correction method of displacement sensor |
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| CN101018664A (en) * | 2004-09-15 | 2007-08-15 | 株式会社小松制作所 | Control device and control method for servo press |
| CN101234536A (en) * | 2008-02-02 | 2008-08-06 | 广东宏兴机械有限公司 | Multifunctional servo crank presser and operation mode thereof |
| CN201165063Y (en) * | 2008-01-25 | 2008-12-17 | 扬州锻压机床集团有限公司 | Punching machine slipper block bottom dead center automatic regulating apparatus |
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| JPS61169200A (en) * | 1985-01-22 | 1986-07-30 | Toshiba Corp | Press machine |
| CN101018664A (en) * | 2004-09-15 | 2007-08-15 | 株式会社小松制作所 | Control device and control method for servo press |
| CN201165063Y (en) * | 2008-01-25 | 2008-12-17 | 扬州锻压机床集团有限公司 | Punching machine slipper block bottom dead center automatic regulating apparatus |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909884A (en) * | 2012-10-25 | 2013-02-06 | 金丰（中国）机械工业有限公司 | Device and method for compensating position error of lower dead point of punching machine |
| CN102909884B (en) * | 2012-10-25 | 2014-12-31 | 金丰（中国）机械工业有限公司 | Device and method for compensating position error of lower dead point of punching machine |
| CN103660361A (en) * | 2013-12-11 | 2014-03-26 | 南京航空航天大学 | Control system for servo press |
| CN104190837A (en) * | 2014-07-17 | 2014-12-10 | 奚进洲 | Method and device for monitoring running state of cold header |
| CN105700453A (en) * | 2016-01-22 | 2016-06-22 | 扬力集团股份有限公司 | Control system and method for intelligent-type servo press |
| CN105700453B (en) * | 2016-01-22 | 2019-01-08 | 扬力集团股份有限公司 | A kind of control system and its control method of intelligent servo-pressing machine |
| CN109719160A (en) * | 2019-01-16 | 2019-05-07 | 佛山市传恒机电制造有限公司 | Stamping press balance detecting device, method and punching machine |
| CN110524942A (en) * | 2019-08-02 | 2019-12-03 | 南京农业大学 | A kind of press machine bottom dead centre method of adjustment and system |
| CN110524942B (en) * | 2019-08-02 | 2024-05-14 | 南京农业大学 | Press bottom dead center adjusting method and system |
| CN110509595A (en) * | 2019-08-07 | 2019-11-29 | 浙江锋源氢能科技有限公司 | A kind of press ram bottom dead center position precision detection system |
| CN110561822A (en) * | 2019-08-29 | 2019-12-13 | 山东省科学院激光研究所 | Servo press bottom dead center deviation motor command automatic compensation method |
| CN110561821A (en) * | 2019-08-29 | 2019-12-13 | 山东省科学院激光研究所 | Servo press bottom dead center deviation feedback compensation method |
| CN110561822B (en) * | 2019-08-29 | 2021-05-25 | 山东省科学院激光研究所 | Servo press bottom dead center deviation motor command automatic compensation method |
| CN110561821B (en) * | 2019-08-29 | 2022-02-01 | 山东省科学院激光研究所 | Servo press bottom dead center deviation feedback compensation method |
| CN112484626A (en) * | 2020-11-18 | 2021-03-12 | 浙江万丰奥威汽轮股份有限公司 | Correction method of displacement sensor |
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Application publication date: 20120118 |