CN103331400B - Speed control system of hydraulic wheel hub forging machine - Google Patents
Speed control system of hydraulic wheel hub forging machine Download PDFInfo
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- CN103331400B CN103331400B CN201310277901.0A CN201310277901A CN103331400B CN 103331400 B CN103331400 B CN 103331400B CN 201310277901 A CN201310277901 A CN 201310277901A CN 103331400 B CN103331400 B CN 103331400B
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- sliding block
- wheel hub
- servo valve
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Abstract
The invention discloses a speed control system of a hydraulic wheel hub forging machine. The speed control system comprises a displacement sensor, a programmable controller, a programmable controller PID control module and a servo valve. The programmable controller is used for receiving position information of a sliding block, average speed of the sliding block is calculated according to displacement information of the sliding block and median filtering processing is performed on the average speed of the sliding block. The PID control module receives average speed information after the median filtering and issues a control output instruction according to the average speed information. The servo valve is used for receiving the control output instruction to achieve speed control over the wheel hub hydraulic isothermal forging machine. The input port of the programmable controller is electrically connected with the displacement sensor, the output port of the programmable controller is electrically connected with the input port of the PID control module, and the output terminal of the PID control module is electrically connected with the input terminal of the servo valve. The median filtering algorithm is introduced to the isothermal forging speed closed-loop control system, and accuracy and anti-interference of the speed control over the sliding block by the hydraulic isothermal forging machine are improved.
Description
Technical field
The present invention relates to hydraulic press technical field, more particularly to a kind of speed-adjusting and control system of wheel hub hydraulic forging press.
Background technology
Increasingly extensive with hydraulic press range of application, digital Control Technology is also obtained in isothermal forging hydropress
It is widely applied, therefore isothermal forging numerically controlled hydraulic press proposes requirement higher to sliding block pressing speed.Traditional isothermal forging
Hydraulic press directly calculates running speed of sliding block by gathering slider displacement in program, the ram speed that will be calculated
As the actually detected value of speed closed loop closed-loop control, because isothermal forging hydropress requirement work pressing speed scope is typically non-
It is often low, if shake somewhat occurs in the actual motion speed for calculating, velocity close-loop control may be caused very big
Influence, therefore, design and develop a kind of hydraulic forging press that can exclude or reduce above-mentioned interference signal and be particularly important.
The content of the invention
The technical problem to be solved in the present invention is：A kind of speed governing control of the wheel hub hydraulic forging press based on medium filtering is provided
System processed.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：
A kind of speed-adjusting and control system of wheel hub hydraulic forging press, the wheel hub hydraulic forging press is the wheel for being provided with servo valve
Hub isothermal forging hydropress, the speed-adjusting and control system includes：
Displacement transducer, the positional information for detecting sliding block；
Programmable Logic Controller, the positional information for receiving the sliding block, the displacement information according to sliding block calculates sliding block
Average speed, and average speed to the sliding block carries out median filter process；The Programmable Logic Controller includes PID control
Module, the pid control module receives the mean velocity information after medium filtering, and according to the mean velocity information, makes
Controlled output is instructed；
Servo valve, for receiving speed control of the controlled output instruction realization to wheel hub isothermal forging hydropress；
Wherein：The input port of Programmable Logic Controller is electrically connected with displacement transducer, the output port of Programmable Logic Controller
Electrically connected with the input port of PID controller, the lead-out terminal of the PID controller is electrically connected with the input terminal of servo valve.
Used as optimal technical scheme, the present invention additionally uses following technical scheme：
Institute's displacement sensors are high accuracy displacement sensor.
The work pressing speed scope of the wheel hub isothermal forging hydropress is 0.002mm/s-0.5mm/s.
The present invention has the advantages and positive effects that：By using above-mentioned technical proposal, the present invention is according to isothermal forging
The working characteristics of hydraulic press Ultra-Low Speed, median filtering algorithm is incorporated into isothermal forging closed loop speed control system, Ke Yiyou
Effect eliminates nonlinear pulse interference signal, improves isothermal forging hydropress to the sliding block control accuracy of speed and anti-interference
Property.
Brief description of the drawings
Fig. 1 is circuit block diagram of the invention；
Fig. 2 is the control flow chart of preferred embodiment of the present invention.
Wherein：1st, displacement transducer；2nd, Programmable Logic Controller；3rd, servo valve.
Specific embodiment
For the content of the invention of the invention, feature and effect can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing
Describe in detail as follows：
Fig. 1, a kind of speed-adjusting and control system of wheel hub hydraulic forging press are referred to, the wheel hub hydraulic forging press is to be provided with
The wheel hub isothermal forging hydropress of servo valve, the work pressing speed model of the wheel hub isothermal forging hydropress in this specific embodiment
It is 0.002mm/s-0.5mm/s to enclose；The speed-adjusting and control system includes：Displacement transducer 1, Programmable Logic Controller 2 and servo
Valve 3；Wherein：Displacement transducer 1 is used to detect the positional information of sliding block；Programmable Logic Controller 2 is used to receive the position of the sliding block
Confidence ceases, using formula：V=S/t（S is the displacement variable of sliding block, t be sliding block complete spent by above-mentioned displacement variable when
Between）Calculate the average speed of the sliding block, and average speed to the sliding block carries out median filter process, by medium filtering
Mean velocity information afterwards is sent to the pid control module in Programmable Logic Controller 2, and pid control module is according to the average speed
Degree information, makes controlled output instruction；Servo valve 3 receives the controlled output instruction from Programmable Logic Controller 2 and realizes to wheel hub
The control of isothermal forging hydropress speed；
Annexation between above-mentioned all parts is：The input port of Programmable Logic Controller 2 and the electricity of displacement transducer 1
Connection, the output port of Programmable Logic Controller 2 is electrically connected with the input terminal of servo valve 3.
Fig. 2 is referred to, the course of work of the invention is：Displacement transducer 1 in this specific embodiment is preferably high accuracy
Displacement transducer；Wheel hub isothermal forging hydropress in the course of the work, under the compacting using high accuracy displacement sensor to sliding block
Line position is put and is detected, the positional information of sliding block then is sent into Programmable Logic Controller 2, and Programmable Logic Controller 2 includes speed
Computing module, medium filtering module and pid control module；Wherein speed calculation module is first according to the positional information of sliding block
The displacement variable of sliding block is calculated, the average speed of sliding block is calculated then in conjunction with the timing unit in Programmable Logic Controller 2；
Subsequent medium filtering module carries out median filter process to above-mentioned average speed, and the average speed after treatment is sent into PID controls
Molding block, pid control module makes controlled output instruction according to above-mentioned average speed, and controlled output instruction is sent into servo valve
3, servo valve 3 realizes the control to wheel hub isothermal forging hydropress speed according to the controlled output instruction for receiving.
Embodiments of the invention have been described in detail above, but the content is only presently preferred embodiments of the present invention,
It is not to be regarded as limiting practical range of the invention.All impartial changes made according to the present patent application scope and improvement etc.,
All should still belong within patent covering scope of the invention.
Claims (3)
1. a kind of speed-adjusting and control system of wheel hub hydraulic forging press, it is characterised in that：The wheel hub hydraulic forging press is to be provided with
The wheel hub isothermal forging hydropress of servo valve, the speed-adjusting and control system includes：
Displacement transducer, the positional information for detecting sliding block；
Programmable Logic Controller, Programmable Logic Controller includes speed calculation module, medium filtering module and pid control module；Its
The displacement variable of positional information calculation sliding block of the medium velocity computing module first according to sliding block, then in conjunction with Programmable Logic Controller
Interior timing unit calculates the average speed of sliding block；Subsequent medium filtering module carries out medium filtering to above-mentioned average speed
Treatment, pid control module is sent to by the average speed after treatment, and pid control module makes control according to above-mentioned average speed
Output order, servo valve is sent to by controlled output instruction, and servo valve is realized to wheel hub according to the controlled output instruction for receiving
The control of isothermal forging hydropress speed；
Servo valve, for receiving speed control of the controlled output instruction realization to wheel hub isothermal forging hydropress；
Wherein：The input port of Programmable Logic Controller is electrically connected with displacement transducer, the output port and PID of Programmable Logic Controller
The input port electrical connection of controller, the lead-out terminal of the PID controller is electrically connected with the input terminal of servo valve.
2. speed-adjusting and control system according to claim 1, it is characterised in that：Institute's displacement sensors are passed for high precision displacement
Sensor.
3. speed-adjusting and control system according to claim 1 and 2, it is characterised in that：The wheel hub isothermal forging hydropress
Work pressing speed scope is 0.002mm/s-0.5mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277901.0A CN103331400B (en) | 2013-07-04 | 2013-07-04 | Speed control system of hydraulic wheel hub forging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277901.0A CN103331400B (en) | 2013-07-04 | 2013-07-04 | Speed control system of hydraulic wheel hub forging machine |
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| Publication Number | Publication Date |
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| CN103331400A CN103331400A (en) | 2013-10-02 |
| CN103331400B true CN103331400B (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310277901.0A Active CN103331400B (en) | 2013-07-04 | 2013-07-04 | Speed control system of hydraulic wheel hub forging machine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458141B (en) * | 2014-09-04 | 2018-05-11 | 天津市天锻压力机有限公司 | The support pressure closed-loop control system and method for a kind of hydraulic forging press |
| CN105822815B (en) * | 2015-01-07 | 2018-10-02 | 宝山钢铁股份有限公司 | Pulse-controlled electromagnetic valve automated location control method of the high-precision with precomputation |
| CN104889297B (en) * | 2015-05-15 | 2016-08-31 | 安庆师范学院 | The closed-loop control system of a kind of fluid pressure type forging machine tool and control method |
| CN105423977A (en) * | 2015-11-18 | 2016-03-23 | 合肥合锻机床股份有限公司 | Hydraulic press slider detection device and detection method thereof |
| CN107120328A (en) * | 2017-04-26 | 2017-09-01 | 天津市天锻压力机有限公司 | The process control system and control method of isothermal forging hydropress |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02151337A (en) * | 1988-12-02 | 1990-06-11 | Brother Ind Ltd | Forging machine |
| CN1765618A (en) * | 2004-10-29 | 2006-05-03 | 天津市天锻压力机有限公司 | Digit controlled hydraulic press capable of realizing liquid closed-loop control |
| CN101125352A (en) * | 2007-09-27 | 2008-02-20 | 天津市天锻压力机有限公司 | Ultramicro-speed closed loop controlling structure for hydraulic forming machine |
| CN101168305A (en) * | 2007-11-22 | 2008-04-30 | 天津市天锻压力机有限公司 | Hydraulic machine slide block down speed control structure |
| CN101637978A (en) * | 2008-12-09 | 2010-02-03 | 天津市天锻压力机有限公司 | Deviation correction control system for longitudinal beam hydraulic machine |
| CN102303421A (en) * | 2011-09-20 | 2012-01-04 | 天津市天锻压力机有限公司 | System and method for controlling running speed of hydraulic press |
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