CN107052210B - The constant strain control system and control method of Superplastic Isothermal Forging hydraulic press - Google Patents
The constant strain control system and control method of Superplastic Isothermal Forging hydraulic press Download PDFInfo
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- CN107052210B CN107052210B CN201710282260.6A CN201710282260A CN107052210B CN 107052210 B CN107052210 B CN 107052210B CN 201710282260 A CN201710282260 A CN 201710282260A CN 107052210 B CN107052210 B CN 107052210B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
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Abstract
The invention discloses a kind of constant strain control system of Superplastic Isothermal Forging hydraulic press and control methods, including：Displacement sensor, for acquiring slide position data；Proportioning pump makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；High frequency respective direction valve makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；Programmable controller, the uninterrupted for reading slide position data and calculating sliding block real-time speed, control uninterrupted and high frequency respective direction valve that export ratio pumps；The input port and displacement sensor of programmable controller are electrically connected, and the output port of programmable controller is electrically connected with the flow control circuit of proportioning pump, and the output port of programmable controller is electrically connected with high frequency respective direction valve terminal.The present invention exports ratio pump discharge or the proportional servo valve flow of real-time change according to programmable controller to achieve the purpose that the constant strain technology controlling and process based on leveling system required in Superplastic Isothermal Forging hydraulic press.
Description
Technical field
The present invention relates to isothermal forging hydropress technical fields, more particularly to a kind of Superplastic Isothermal Forging hydraulic press
Constant strain control system and control method.
Background technique
With the rapid development of hydraulic press technology, the production of Superplastic Isothermal Forging hydraulic press has a wide range of applications and city
Field prospect, traditional Superplastic Isothermal Forging hydraulic press intelligent controlling is not high, with the development of digital technology and automatically
The extensive use of change technology, the method for more and more introducing automation controls of Superplastic Isothermal Forging hydraulic press, is more preferable
Meet the market demand, design the constant strain control system and controlling party of a set of reliable and stable Superplastic Isothermal Forging hydraulic press
Method is particularly important.
Summary of the invention
The technical problem to be solved by the present invention is to：A kind of constant strain control system of Superplastic Isothermal Forging hydraulic press is provided
And control method.The present invention according to programmable controller export real-time change ratio pump discharge or proportional servo valve flow to
Achieve the purpose that the constant strain technology controlling and process based on leveling system required in Superplastic Isothermal Forging hydraulic press.
The present invention is adopted the technical scheme that solve technical problem present in well-known technique：
A kind of constant strain control system of Superplastic Isothermal Forging hydraulic press, includes at least：
Displacement sensor, for acquiring slide position data；
Proportioning pump makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；
High frequency response direction valve makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；
Programmable controller, for read slide position data and calculate sliding block real-time speed, control export ratio pump
The uninterrupted of uninterrupted and high frequency response direction valve
Wherein：The input port and displacement sensor of programmable controller are electrically connected, the output port of programmable controller
It is electrically connected with the flow control circuit of proportioning pump, output port and the high frequency response direction valve terminal of programmable controller are electrically connected
It connects.
A kind of control method of the constant strain control system of Superplastic Isothermal Forging hydraulic press includes at least following steps：
According to Superplastic Isothermal Forging technique formula v=ε × h；Wherein：V is speed setting, and ε is constant strain rate；H is
Workpiece height；Programmable controller acquires the location information at four angles of sliding block, then calculates the real-time speed in pressing process
V1,6000T master cylinder tracking setting speed v, while sliding block is leveled and tracks setting speed v by four side 1000T cylinders；
Master cylinder is acted on by high frequency response direction valve YAA and high frequency response direction valve YAB parallel connection, wherein high frequency response direction valve
YAA is DG6, high frequency response direction valve YAB is DG10, is cooperated using the algorithm of discrete PID control in different two valves of velocity shooting
It uses, is controlled in desired relatively low speed using the high frequency response direction valve YAA of small latus rectum, in desirable relatively high speed
Degree uses two valve co- controllings；Velocity interval uses the high frequency response direction of small latus rectum within the scope of 0.005-0.09mm/s
Valve YAA is adjusted, and uses the method for point three sections of pid parameters；Velocity interval uses high frequency response direction in 0.09-0.5mm/s
The method that valve YAA and high frequency response direction valve YAB are adjusted jointly；
Side cylinder includes four speed regulation high frequency response direction valve YAP, i.e. high frequency response direction valve YAPa, high frequency response direction valve
YAPb, high frequency response direction valve YAPc and high frequency response direction valve YAPd；Point three kinds of modes when speed regulation,
First way, it is the two close cycles of speed, control for position outer ring that velocity interval, which uses inner ring in 0.1-0.5mm/s,
Algorithm is that position inner ring calculates, and speed outer ring calculates, i.e., position is first adjusted to reasonable level when position deviation is excessive
Adjusting again afterwards makes speed reach stable；
The second way, velocity interval only use speed closed loop in 0.02-0.1mm/s, using high frequency response direction valve YAP
Mode, which be early period sliding block have been adjusted to reasonable level, the feelings for only needing to regulate the speed in the compacting in later period
Condition；
The third mode, velocity interval use high frequency response direction valve YAP to be linear to solid in 0.005-0.02mm/s
The mode of definite value, this method be used in early period sliding block have been adjusted to reasonable level, under high frequency response direction valve YAP is only provided
The case where row flow and work for making side cylinder pressurize, the stabilization of speed leans on the direction valve regulation of master cylinder high frequency response.
Further：The leveling control precision of sliding block is 0.2mm/m, and speed control range is in 0.005-0.5mm/s.
Further：Four speed regulation high frequency response direction valve YAP control variation critical values are 0.1mm/s, high frequency response direction
Valve YAA and high frequency response direction valve YAB control variation critical point is 0.09mm/s, by the velocity variations of master cylinder and side cylinder point minute
It opens.
The invention has the advantages and positive effects that：
One, by the present invention in that improving the stationarity of sliding block at work with the control method with leveling；Two, this hair
It is bright independently to control four side cylinders by using two high frequency response direction valve control master cylinders and four high frequency response direction valves
The coordination approach of control, improves the precision of process speed, the ability closed loop control algorithm of three, six high frequency response direction valves,
Improve the rapidity and stability of control system.
Detailed description of the invention
Fig. 1 is the structural block diagram of the preferred embodiment of the present invention；
Fig. 2 is the functional block diagram that master cylinder acts in the preferred embodiment of the present invention；
Fig. 3 is the functional block diagram that side cylinder acts in the preferred embodiment of the present invention；
Wherein：BQ1a, BQ1b, BQ1c, BQ1d are displacement sensor；M1 is variable pump；YAA and YAB is master cylinder high frequency sound
Answer direction valve；YAPa, YAPb, YAPc, YAPd are side cylinder high frequency response direction valve.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows：
Referring to Fig. 1, a kind of constant strain control system of Superplastic Isothermal Forging hydraulic press, including：
Displacement sensor, for acquiring slide position data；
Proportioning pump makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；
High frequency response direction valve makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；
Programmable controller, for read slide position data and calculate sliding block real-time speed, control export ratio pump
The uninterrupted of uninterrupted and high frequency response direction valve.
Referring to Fig. 2, a kind of control method of the constant strain control system of Superplastic Isothermal Forging hydraulic press, including：
According to Superplastic Isothermal Forging technique formula v=ε × h；Wherein：V is speed setting, and ε is constant strain rate；H is
Workpiece height；Programmable controller acquires the location information at four angles of sliding block, then calculates the real-time speed in pressing process
V1,6000T master cylinder tracking setting speed v, while sliding block is leveled and tracks setting speed v by four side 1000T cylinders；
Master cylinder is acted on by high frequency response direction valve YAA and valve YAB parallel connection, and wherein YAA is DG6, YAB DG10, using from
The algorithm for dissipating PID control is used cooperatively in different two valves of velocity shooting, and the valve of small latus rectum is used when it is expected relatively low speed
YAA is controlled, and uses two valve co- controllings in the relatively high speed of expectation.Velocity interval is in 0.005-0.09mm/s speed
It spends in range and is adjusted using the valve YAA of small latus rectum, and use the method for point three sections of pid parameters；Velocity interval is in 0.09-0.5mm/
The method adjusted jointly when s using valve YAA and valve YAB.
Referring to Fig. 3, side cylinder includes four speed regulation high frequency response direction valve YAP (respectively valve YAPa, valve YAPb, valve
YAPc and valve YAPd) speed regulation when point three kinds of modes, first way, velocity interval uses inner ring for position in 0.1-0.5mm/s
The two close cycles that outer ring is speed are set, control algolithm is that position inner ring calculates, and speed outer ring calculates, i.e., first excessive in position deviation
When position is adjusted to adjust again after reasonable level speed is made to reach stable.
The second way, velocity interval is in 0.02-0.1mm/s, in such a way that YAP only uses speed closed loop, which
Be early period sliding block have been adjusted to reasonable level, only need the case where regulating the speed in the compacting in later period.The third mode,
Velocity interval uses YAP for the linear mode to fixed value in 0.005-0.02mm/s, and this method is used in sliding block early period
Reasonable level is had been adjusted to, the stabilization of the work that YAP only provides downlink traffic and side cylinder is made to pressurize, speed leans on master cylinder high frequency sound
The case where answering direction valve regulation.
Wherein：The input port and displacement sensor of programmable controller are electrically connected, the output port of programmable controller
It is electrically connected with the flow control circuit of proportioning pump, output port and the high frequency response direction valve terminal of programmable controller are electrically connected
It connects.
The leveling control precision of sliding block is up to 0.2mm/m, and speed control range is in 0.005-0.5mm/s.Further, side
The valve control variation critical value of cylinder is 0.1mm/s, and the valve control variation cut-off point selection of master cylinder is 0.09mm/s, thus by master cylinder
It is separated with the velocity variations point of side cylinder, it in this way can be excessive to avoid system disturbance caused by control mode variation.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,
It should not be considered as limiting the scope of the invention.Any changes and modifications in accordance with the scope of the present application,
It should still be within the scope of the patent of the present invention.
Claims (3)
1. a kind of control method of the constant strain control system of Superplastic Isothermal Forging hydraulic press, it is characterised in that：The super modeling
The constant strain control system of property isothermal forging hydropress includes at least：
Displacement sensor, for acquiring slide position data；
Proportioning pump makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；
High frequency response direction valve makes slide block movement for being supplied to the adjustable controllable oil liquid of oil cylinder；
Programmable controller, for reading slide position data and calculating sliding block real-time speed, the flow that control export ratio pumps
The uninterrupted of size and high frequency response direction valve；
Wherein：The input port and displacement sensor of programmable controller are electrically connected, the output port of programmable controller with than
The flow control circuit electrical connection of example pump, the output port of programmable controller are electrically connected with high frequency response direction valve terminal；
The control method includes at least following steps：
According to Superplastic Isothermal Forging technique formula v=ε × h；Wherein：V is setting speed, and ε is constant strain rate；H is workpiece
Highly；Programmable controller acquires the location information at four angles of sliding block, then calculates the real-time speed v1 in pressing process,
6000T master cylinder tracking setting speed v, while sliding block is leveled and tracks setting speed v by four side 1000T cylinders；
Master cylinder is acted on by high frequency response direction valve YAA and high frequency response direction valve YAB parallel connection, wherein high frequency response direction valve YAA
It is DG10 for DG6, high frequency response direction valve YAB, is made using the algorithm of discrete PID control in different two valve of velocity shooting cooperations
With being controlled in desired relatively low speed using the high frequency response direction valve YAA of small latus rectum, in desirable relatively high speed
Use two valve co- controllings；Velocity interval uses the high frequency response direction valve of small latus rectum within the scope of 0.005-0.09mm/s
YAA is adjusted, and uses the method for point three sections of pid parameters；Velocity interval uses high frequency response direction valve in 0.09-0.5mm/s
The method that YAA and high frequency response direction valve YAB are adjusted jointly；
Side cylinder includes four speed regulation high frequency response direction valve YAP, i.e. high frequency response direction valve YAPa, high frequency response direction valve
YAPb, high frequency response direction valve YAPc and high frequency response direction valve YAPd；Point three kinds of modes when speed regulation,
First way, it is the two close cycles of speed, control algolithm for position outer ring that velocity interval, which uses inner ring in 0.1-0.5mm/s,
It is that position inner ring calculates, speed outer ring calculates, i.e., is first adjusted to position after reasonable level again when position deviation is excessive
Adjustment makes speed reach stable；
The second way, velocity interval only use the side of speed closed loop using high frequency response direction valve YAP in 0.02-0.1mm/s
Formula, which be early period sliding block have been adjusted to reasonable level, only need the case where regulating the speed in the compacting in later period；
The third mode, velocity interval use high frequency response direction valve YAP for linearly to fixed value in 0.005-0.02mm/s
Mode, this method be used in early period sliding block have been adjusted to reasonable level, high frequency response direction valve YAP only provide downstream
The case where work measured and side cylinder is made to pressurize, the stabilization of speed leans on the direction valve regulation of master cylinder high frequency response.
2. the control method of the constant strain control system of Superplastic Isothermal Forging hydraulic press according to claim 1, special
Sign is：The leveling control precision of sliding block is 0.2mm/m, and speed control range is in 0.005-0.5mm/s.
3. the control method of the constant strain control system of Superplastic Isothermal Forging hydraulic press according to claim 1, special
Sign is：Four speed regulation high frequency response direction valve YAP control variation critical values are 0.1mm/s, high frequency response direction valve YAA and height
It is 0.09mm/s that direction valve YAB control variation critical point is answered in frequency response, and the velocity variations of master cylinder and side cylinder point is separated.
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| CN111604453A (en) * | 2020-05-20 | 2020-09-01 | 天津天锻航空科技有限公司 | Multi-station workbench positioning control system and control method of hydraulic forging press |
| CN113898623B (en) * | 2021-09-17 | 2024-04-12 | 天津市天锻压力机有限公司 | Hydraulic system, control system and control method of multifunctional hydraulic forging press |
| CN117432671B (en) * | 2023-11-20 | 2024-07-05 | 中机锻压江苏股份有限公司 | High-safety electric control follow-up main control valve and use method thereof |
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