CN111086266A - Self-adaptive variable-speed parking method and device for intelligent press - Google Patents
Self-adaptive variable-speed parking method and device for intelligent press Download PDFInfo
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- CN111086266A CN111086266A CN201911389846.8A CN201911389846A CN111086266A CN 111086266 A CN111086266 A CN 111086266A CN 201911389846 A CN201911389846 A CN 201911389846A CN 111086266 A CN111086266 A CN 111086266A
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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
- B30B15/14—Control arrangements for mechanically-driven presses
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/10—Brakes specially adapted for presses
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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
- B30B15/14—Control arrangements for mechanically-driven presses
- B30B15/148—Electrical control arrangements
Abstract
The invention discloses a self-adaptive variable-speed parking method and a device for an intelligent press, wherein the variable-speed parking method comprises the following steps: and (3) steady state adjustment: detecting an angle value and a running speed of the machine tool before braking, braking the machine tool at the speed and stably sliding to stop under the inertia effect, taking an angle difference between a stopping point angle and an upper dead point as a correction angle, and calculating a steady-state braking point of the punching machine according to the correction angle and the sliding angle after braking; speed change adjustment, namely calculating a brake point, a brake point speed and a correction variation during speed, and performing more than one speed change adjustment on the brake point speed until the top of the machine tool stops; updating the brake point value to obtain the corresponding speed V0The braking point and the correction angle. The variable-speed stopping method of the invention gets rid of the limitation of the die, adapts to the speed of the machine tool through self-adaptive adjustment,The influence of mould weight and kind, parking, it is effectual to adjust, and application scope is wide.
Description
Technical Field
The invention relates to the technical field of mechanical press control, in particular to an intelligent press self-adaptive variable speed parking method and device.
Background
The punching machine is a common machine device in industrial production, and the press machine stopping device is a common device of the punching machine. The press machine stopping devices on the market are generally provided with an automatic correction function, and most of the press machine stopping devices are corrected based on the situation that the current running speed is the same as or has a small difference with the previous running speed. If the difference between the current running speed and the last running speed is large, the correction effect is much worse. In the conventional press stopping device, when a die is fixed, the device needs to monitor the frequency to determine the speed and further determine the braking point. When the mould is uncertain, the mould is regulated according to the weight by a mould coefficient, the coefficient is related to the machine frequency, and the coefficient can be called from a database. If the mould does not exist in the database, the correction coefficient can be self-adapted, and the equipment determines the braking point according to the non-linear relation by monitoring the mould and the proportionality coefficient. In actual operation, because the brake has a sliding distance, the brake needs to be carried out for a certain distance in advance, and the sliding distance is changed, the existing parking device cannot meet the requirement.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defects in the prior art, the invention discloses a self-adaptive variable-speed parking method and a self-adaptive variable-speed parking device for an intelligent press, wherein the variable-speed parking method is independent of the weight of a die, and is adaptive to the influences of the speed of a machine tool, the weight and the type of the die and the parking by self-adaptive adjustment, so that the limitation of the die is eliminated, and the self-adaptive adjustment effect is good.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
an adaptive speed-changing parking method for intelligent press machine is used to stop the press machine to the top dead center position, i.e. to stop the press machine at the top point, and is characterized in that the position change of the reciprocating motion of the press machine from the top dead center to the bottom dead center is expressed by the angle change mode of 0-360 degrees of the flywheel of the press machine, 0 degree represents that the press machine is initially positioned at the top dead center position, 180 degrees represents that the press machine is positioned at the bottom dead center position, 360 degrees represents that the press machine returns to the top dead center position,
the parking method comprises the following steps:
s1, steady state adjustment: detecting an angle value and a running speed of the machine tool before braking, braking the machine tool at the speed and stably sliding to stop under the inertia effect, taking an angle difference between a stopping point angle and an upper dead point as a correction angle, calculating a steady-state braking point of the punching machine according to the correction angle and the sliding angle after braking, and stopping the top point of the machine tool at the steady-state braking point position at the speed;
s2, speed change adjustment: and (4) calculating a braking point, a braking point speed and a correction variation when the speed is calculated by taking the steady-state braking in the step S1 as a reference standard, wherein the braking point speed and the correction variation conform to the following functional relationship:
wherein Δ V is the correction variation of speed, V0The brake point speed is detected in real time;
the speed of a braking point is adjusted in a speed changing manner for more than one time according to the functional relation in the formula (1) until the top of the machine tool stops;
s3, updating the brake point value to obtain the corresponding speed V0The braking point and the correction angle.
Preferably, in the process of each shift adjustment in step S2, the correction angle and the braking point of the press machine are calculated for each shift adjustment in the steady-state adjustment mode in step S1, and the machine speed is updated before the next shift adjustment.
Preferably, the position of the machine during operation is detected by an electronic cam device.
Preferably, the parking mode comprises three modes of inching, single action and linkage.
A device for realizing the self-adaptive variable speed parking method of the intelligent press is characterized in that: the automatic punching machine comprises a punching machine tool, a parking device, a frequency converter and an electronic cam device, wherein the frequency converter is used for adjusting the running speed of the punching machine tool; the parking device can stop at a preset position, the parking device comprises a controller, a data collector and an operating panel, the data collector is respectively connected with the controller, the data collector is used for collecting current state information of the punching machine and transmitting the current state information to the controller, the data collector comprises a frequency detection module and a magnetic encoder, the frequency detection module is used for detecting the flywheel rotation frequency of the punching machine, the magnetic encoder is used for collecting the flywheel rotation angle, the controller processes received data, the controller is provided with a timing module, and the operating panel is provided with a parking button for inputting a parking operation instruction to the controller and a motor control button for inputting power state information of a motor.
Preferably, the controller is provided with a learning module for storing detected or calculated brake parameters in the steady-state speed regulation or speed change regulation process of the machine tool and calling the parking device when the parking device works.
Has the advantages that: due to the adoption of the technical scheme, the invention has the following technical effects:
(1) according to the self-adaptive variable-speed parking method and device for the intelligent press, the variable-speed function is not changed according to the change of the weight of the die, the self-adaptive variable-speed parking method and device can adapt to various different dies, and the function of stopping at a dead point can be realized, namely, a flywheel is automatically stopped at the top dead point;
(2) according to the self-adaptive variable-speed parking method and device for the intelligent press, the self-adaptive function can be used for adapting to the influences of speed, weight and type of a die and parking, so that the system is more stable;
(3) the self-adaptive speed-changing parking method and device of the intelligent press machine have a learning function, can further automatically correct and correct the error range after the device changes the speed, simultaneously have a memory function, can reach an accurate position in the next operation, and can stop at the top dead center even after the speed changes greatly each time.
Drawings
FIG. 1 is a flow chart of a correction process in the adaptive braking control method according to the present invention;
fig. 2 is a timing chart of the adaptive braking control method according to the present invention in three modes.
Detailed Description
The scheme is further explained by combining the attached drawings.
As shown in fig. 1, an adaptive variable speed parking method for an intelligent press machine, for stopping a press machine to a top dead center position, i.e., a top dead center parking, is characterized in that the position change of the reciprocating motion of the press machine from the top dead center to a bottom dead center is expressed in the form of the angle change of 0-360 degrees of a flywheel of the machine, 0 degree represents that the machine is initially located at the top dead center position, 180 degrees represents that the machine is located at the bottom dead center position, 360 degrees represents that the machine is returned to the top dead center position,
the parking method comprises the following steps:
s1, steady state adjustment: detecting an angle value and a running speed of the machine tool before braking, braking the machine tool at the speed and stably sliding to stop under the inertia effect, taking an angle difference between a stopping point angle and an upper dead point as a correction angle, calculating a steady-state braking point of the punching machine according to the correction angle and the sliding angle after braking, and stopping the top point of the machine tool at the steady-state braking point position at the speed;
s2, speed change adjustment: and (4) calculating a braking point, a braking point speed and a correction variation when the speed is calculated by taking the steady-state braking in the step S1 as a reference standard, wherein the braking point speed and the correction variation conform to the following functional relationship:
wherein Δ V is the correction variation of speed, V0The brake point speed is detected in real time;
the speed of a braking point is adjusted in a speed changing manner for more than one time according to the functional relation in the formula (1) until the top of the machine tool stops;
s3, updating the brake point value to obtain the corresponding speed V0The braking point and the correction angle.
In the invention, the brake mark can be indicated by light and sound. And meanwhile, the condition of power on or power off of the motor is detected, and the motor is powered off and the like according to actual needs. The invention adjusts the speed of the machine tool step by step through steady state adjustment and variable speed adjustment, so that the speed is gradually changed, the whole adjusting process is stable, and the invention can be suitable for the situation that the operation speed after adjustment is the same as or has smaller difference with the operation speed before adjustment, and can also be suitable for the situation that the operation speed after adjustment is greatly different from the operation speed before adjustment.
In the invention, the parking mode comprises three modes of inching, single-acting and linkage, the inching does not need to stop the top dead center, and the single-acting and linkage need to stop the top dead center.
Example one
FIG. 2 is a timing diagram of an embodiment of top-stop, IN which IN-2 is the park button input point, and the parking apparatus starts to prepare for parking when the IN-2 input turns OFF; IN-3 is a power supply input point of the motor, ON represents that the motor is electrified, and OFF represents that the motor is powered OFF; OUT-2 is the output point of the parking device, after receiving the signal of IN-2, the parking device calculates the starting braking point by calculation, the output is turned OFF when the braking point is reached, after detecting that IN-3 is turned OFF, the braking action is finished, and OUT-2 can be turned ON; thus, a braking action is completed. When the device position exceeds 180 degrees, it can automatically return to the top dead center. The device realizes accurate stop at the top point under the speed change state through the stopping device.
The sliding distance from the control brake of the parking device to the complete stop of the machine tool mainly depends on the electronic and mechanical reaction delay time, the moving speed of the machine tool and the acceleration during the brake, and the circular motion of a flywheel of the machine tool can be understood as approximately uniform linear motion.
IN the invention, the formula of the calculation of the sliding distance of the machine tool is x-V0 t1+ V0 t2-1/2at2, wherein x represents the sliding distance of the flywheel of the machine tool, V0 represents the speed of the movement of the machine tool before braking, t1 represents the time from the sending of a parking signal from a parking device to the turning OFF of an IN-3 signal, t2 represents the time from the turning OFF of the IN-3 signal to the complete stopping of the machine tool, and a represents the acceleration during braking.
The V0 acquires the angle through the magnetic encoder, and then calculates the current running speed, which can be expressed by the angular speed, that is, the speed is a known value. The time t1 of coasting is due to the delay of the electronic actuator, mainly the delay time of the relay or solenoid valve, and can be calculated by the IN-3 signal fed back from the timing chart, and t2 can also be calculated by the IN-3 signal and the signal fed back from the encoder. The sliding distance x can also be calculated by the signal fed back by the encoder (the angle can be used to represent the distance). The acceleration a becomes a unique variable, the acceleration a is related to the characteristics of the machine tool, and the parking device can obtain the acceleration of different machine tools, so that the parking device has wide applicability. However, due to the error of various collected signals and the fact that the actual working condition is not in an ideal state, a great deal of verification and experiment are needed. In long-term practice, it has been found that the value of a is dynamically modified because the brake pad is subject to wear, resulting in a dynamic change in the value of a.
The invention also provides a device for realizing the self-adaptive variable-speed parking method of the intelligent press, which is characterized in that: the automatic punching machine comprises a punching machine tool, a parking device, a frequency converter and an electronic cam device, wherein the frequency converter is used for adjusting the running speed of the punching machine tool; the parking device can stop at a preset position, the parking device comprises a controller, a data collector and an operating panel, the data collector is respectively connected with the controller, the data collector is used for collecting current state information of the punching machine and transmitting the current state information to the controller, the data collector comprises a frequency detection module and a magnetic encoder, the frequency detection module is used for detecting the flywheel rotation frequency of the punching machine, the magnetic encoder is used for collecting the flywheel rotation angle, the controller processes received data, the controller is provided with a timing module, and the operating panel is provided with a parking button for inputting a parking operation instruction to the controller and a motor control button for inputting power state information of a motor.
Preferably, the controller is provided with a learning module for storing detected or calculated brake parameters in the steady-state speed regulation or speed change regulation process of the machine tool and calling the parking device when the parking device works.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. An adaptive speed-changing parking method for intelligent press machine is used to stop the press machine to the top dead center position, i.e. to stop the press machine at the top point, and is characterized in that the position change of the reciprocating motion of the press machine from the top dead center to the bottom dead center is expressed by the angle change mode of 0-360 degrees of the flywheel of the press machine, 0 degree represents that the press machine is initially positioned at the top dead center position, 180 degrees represents that the press machine is positioned at the bottom dead center position, 360 degrees represents that the press machine returns to the top dead center position,
the parking method comprises the following steps:
s1, steady state adjustment: detecting an angle value and a running speed of the machine tool before braking, braking the machine tool at the speed and stably sliding to stop under the inertia effect, taking an angle difference between a stopping point angle and an upper dead point as a correction angle, calculating a steady-state braking point of the punching machine according to the correction angle and the sliding angle after braking, and stopping the top point of the machine tool at the steady-state braking point position at the speed;
s2, speed change adjustment: and (4) calculating a braking point, a braking point speed and a correction variation when the speed is calculated by taking the steady-state braking in the step S1 as a reference standard, wherein the braking point speed and the correction variation conform to the following functional relationship:
wherein Δ V is the correction variation of speed, V0The brake point speed is detected in real time;
the speed of a braking point is adjusted in a speed changing manner for more than one time according to the functional relation in the formula (1) until the top of the machine tool stops;
s3, updating the brake point value to obtain the corresponding speed V0The braking point and the correction angle.
2. The adaptive variable speed parking method for the intelligent press according to claim 1, characterized in that: in the process of each shift adjustment in step S2, the correction angle and the braking point of the press machine are calculated for each time in the steady-state adjustment mode in step S1, and the machine speed is updated before the next shift adjustment.
3. The adaptive variable speed parking method for the intelligent press according to claim 1, characterized in that: the position of the machine during operation is detected by an electronic cam device.
4. The adaptive variable speed parking method for the intelligent press according to claim 1, characterized in that: the parking mode comprises three modes of inching, single action and linkage.
5. A device for realizing the self-adaptive variable speed parking method of the intelligent press is characterized in that: the automatic punching machine comprises a punching machine tool, a parking device, a frequency converter and an electronic cam device, wherein the frequency converter is used for adjusting the running speed of the punching machine tool; the parking device can stop at a preset position, the parking device comprises a controller, a data collector and an operating panel, the data collector is respectively connected with the controller, the data collector is used for collecting current state information of the punching machine and transmitting the current state information to the controller, the data collector comprises a frequency detection module and a magnetic encoder, the frequency detection module is used for detecting the flywheel rotation frequency of the punching machine, the magnetic encoder is used for collecting the flywheel rotation angle, the controller processes received data, the controller is provided with a timing module, and the operating panel is provided with a parking button for inputting a parking operation instruction to the controller and a motor control button for inputting power state information of a motor.
6. A device for realizing the self-adaptive variable speed parking method of the intelligent press is characterized in that: the controller is internally provided with a learning module which is used for storing brake parameters obtained by detection or calculation in the steady-state speed regulation or speed change regulation process of the machine tool and calling the parking device when the parking device works.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113942062A (en) * | 2021-09-23 | 2022-01-18 | 天津长荣科技集团股份有限公司 | Method and system for calculating in-place of paper |
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| CN203711728U (en) * | 2013-12-23 | 2014-07-16 | 江苏扬力集团有限公司 | Connection control device for hot die forging pressure machine |
| CN204505908U (en) * | 2014-02-20 | 2015-07-29 | 会田工程技术有限公司 | Forcing press |
| CN204263565U (en) * | 2014-09-19 | 2015-04-15 | 江苏人人发机器制造有限公司 | The punch press of automatic location |
| CN204135224U (en) * | 2014-09-19 | 2015-02-04 | 江苏人人发机器制造有限公司 | Be applicable to the protective device of punch press |
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| CN104438951A (en) * | 2014-12-25 | 2015-03-25 | 济南二机床集团有限公司 | Failure recovery method for stamping device of automatic stamping line |
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| CN205033628U (en) * | 2015-08-19 | 2016-02-17 | 谢燕娟 | Novel electron cam controller |
| CN106154964A (en) * | 2016-08-15 | 2016-11-23 | 王赟 | The process control method of mechanical pressure equipment and all-in-one control device |
| CN109894906A (en) * | 2019-03-26 | 2019-06-18 | 南京理工大学 | A kind of redundantly driven parallel bed dead point avoidance system and 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 |
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| CN113942062A (en) * | 2021-09-23 | 2022-01-18 | 天津长荣科技集团股份有限公司 | Method and system for calculating in-place of paper |
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