CN201120444Y - Ultramicro-speed control structure of hydraulic press - Google Patents
Ultramicro-speed control structure of hydraulic press Download PDFInfo
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- CN201120444Y CN201120444Y CNU2007200986726U CN200720098672U CN201120444Y CN 201120444 Y CN201120444 Y CN 201120444Y CN U2007200986726 U CNU2007200986726 U CN U2007200986726U CN 200720098672 U CN200720098672 U CN 200720098672U CN 201120444 Y CN201120444 Y CN 201120444Y
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Abstract
The utility model discloses an ultra speed controller for a hydrostatic press, which comprises an industrial control computer, and a main controller PLC which is connected with the industrial control computer through industrial Ethernet to control the forging hydrostatic press. The main controller PLC is connected with one end of a proportional valve block and one end of a proportional pump group, and the proportional valve block and the proportional pump group are controlled by the main controller PLC; the other end of the proportional valve block and the other end of the proportional pump group are connected with a hydraulic cylinder of the forging hydrostatic press which is driven by the proportional valve block and the proportional pump group; a location sensor which is connected with the main controller PLC to feed back the location signal of the hydraulic cylinder to the main controller PLC is arranged on the hydraulic cylinder; the location sensor is connected with the location input module of the main controller PLC. The proportional valve block is connected with the analog output module of the main controller PLC. The ultra speed controller is simple in structure, good in control effect, and high in automatization degree, precision, real-time performance and reliability. The ultra speed controller can control the speed to be ultra-low and constant in strain, realizes that the speed is freely adjustable within the range of 0.002-12mm/s during forging under constant temperature and realizes constant strain within the speed ranges of 0.002mm/s-0.03/s and 0.04-0.06mm/s.
Description
Technical field
The utility model belongs to a kind of hydraulic forging press, and it is simple particularly to relate to a kind of control structure, has the ultra micro speed control system structure of the hydraulic press of Ultra-Low Speed, constant strain.
Background technology
Along with the develop rapidly of Aero-Space cause, recently aerospace material demands such as titanium alloy and processing request are improved day by day, so increase day by day at the hydraulic press demand that higher controls such as Ultra-Low Speed, constant strain require that has of the characteristic of aerospace materials such as titanium alloy.But the hydraulic press with higher control requirements such as Ultra-Low Speed, constant strains requires to become present insoluble problem with its high control.
Summary of the invention
The utility model provides a kind of control structure simple for solving the technical problem that exists in the known technology, has the ultra micro speed control system structure of the hydraulic press of Ultra-Low Speed, constant strain.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of ultra micro speed control system structure of hydraulic press, include industrial computer, the master controller PLC that is used to control hydraulic forging press that links to each other with industrial computer by EPA, described master controller PLC with by the proportional servo valve group of its control, one end of proportioning pump group links to each other, and the proportional servo valve group, the other end of proportioning pump group links to each other with hydraulic cylinder by the hydraulic forging press of its driving, and hydraulic cylinder is provided with the position sensor that links to each other with master controller PLC and the position signalling of hydraulic cylinder is fed back to master controller PLC.
Described position sensor links to each other with position input module among the master controller PLC.
Described proportional servo valve links to each other with analog output module among the master controller PLC.
Described industrial computer links to each other with ethernet communication module among the master controller PLC by EPA.
Advantage and the good effect that the utlity model has are: because the ultra micro speed control system structure of hydraulic press of the present utility model adopts closed loop controlling structure, control structure is simple, and the control effect stability reaches increasingly automated, high accuracy, high real-time, high reliability.Control effect with Ultra-Low Speed, constant strain.Realized that in isothermal forging technology speed is adjustable arbitrarily in the 0.002-12mm/s velocity interval, and in 0.002mm/s-0.03mm/s and 0.04-0.06mm/s velocity interval, had constant strain control function.
Description of drawings
Fig. 1 is a system of the present utility model control structure schematic diagram;
Fig. 2 is a control principle schematic diagram of the present utility model;
Fig. 3 is a constant speed control design sketch of the present utility model;
Fig. 4 is a constant strain speed control design sketch of the present utility model
Label among the figure is respectively:
The 1-industrial computer; 2-master controller PLC; 3-proportional servo valve group; 4-proportioning pump group; The 5-position sensor; The 6-hydraulic cylinder; The control of 7-constant strain; 8-PID controls software module; 9-workpiece height detection; The 10-deformation velocity detects.
The specific embodiment
Summary of the invention, characteristics and effect for the ultra micro speed control system structure that can further understand the utility model hydraulic press exemplify following examples now, and conjunction with figs. are described in detail as follows:
As shown in Figure 1, the ultra micro speed control system structure of hydraulic press of the present utility model, include industrial computer 1, the master controller PLC2 that is used to control hydraulic forging press that links to each other with industrial computer 1 by EPA, described master controller PLC2 with by the proportional servo valve group 3 of its control, one end of proportioning pump group 4 links to each other, and proportional servo valve group 3, the other end of proportioning pump group 4 links to each other with hydraulic cylinder 6 by the hydraulic forging press of its driving, and hydraulic cylinder 6 is provided with the position sensor 5 that links to each other with master controller PLC2 and the position signalling of hydraulic cylinder 6 is fed back to master controller PLC2.
Described master controller PLC is that to adopt model be SIEMENS S7-300 series of PLC, includes a CPU module and power module and a plurality of input/output module and particular module on it.
Above-mentioned position sensor 5 links to each other with position input module among the master controller PLC2.In embodiment of the present utility model, it is the position input module of SM338 that the position input module is selected model for use; Position sensor 5 is selected American MTS high accuracy linear displacement transducer for use.
Above-mentioned proportional servo valve 3 links to each other with analog output module among the master controller PLC2.In embodiment of the present utility model, it is the analog output module of SM332 that analog output module is selected model for use; Proportional servo valve 3 is selected the servo valve of the high frequency response of Bosch BOSCH-REXROTH for use.
Above-mentioned industrial computer 1 links to each other with ethernet communication module among the master controller PLC2 by EPA.In embodiment of the present utility model, the model of the ethernet communication module on the master controller PLC is CP343-1.
Linear displacement transducer in the utility model is as detection part, via displacement transducer displacement signal is sent into master controller PLC, master controller PLC passes through the speed setting value and the hydraulic forging press shift value of host computer on the one hand, go out the load rate of straining through the PLC sequential operation, and the best pid parameter of adjusting out, control the speed that the proportional servo valve group opening with high frequency response realizes controlling in real time hydraulic forging press in real time, reach optimum control.This control signal is transferred to host computer via master controller PLC computing on the other hand, shows present speed in real time, shift value, and displacement, rate curve.
Shown in Figure 2 is control principle schematic diagram of the present utility model, include the constant speed of setting and control 7 speed of being exported through constant strain according to the coefficient of strain that machined material is set, a kind of and feedback speed signal in two kinds of speed is through the laggard PID control software module 8 of going among the master controller PLC of computing, PID control software module 8 is by the analog output module control ratio servo electromagnetic valve 3 among the master controller PLC2, proportional servo magnetic valve 3 is controlled the action of hydraulic cylinder 6 again, carry out workpiece height detection 9 and detection signal is sent into constant strain control 7 by the position sensor that is arranged on the hydraulic cylinder 6, constant strain control 7 is multiplied each other coefficient of strain ε and is drawn speed change degree V with the workpiece height Δ h that obtains
hDetect in 10 in deformation velocity by the detected workpiece altitude signal of position sensor Δ h simultaneously and carry out velocity transformation, be about to the feedback speed signal V that the height Δ h of detected variation obtains changing divided by time t
t, again with the constant speed V that sets
0Or the constant strain control 7 speed change V that exported
hSpend both one of calculate, the result enters the PID control software module 8 among the master controller PLC, proceeds above-mentioned process, so circulation is controlled hydraulic cylinder.Thereby reached control effect with Ultra-Low Speed, constant strain.
Fig. 3 is a constant speed control design sketch of the present utility model.Be in isothermal forging technology, ultra micro speed is set in 0.002mm/s respectively, 0.02mm/s, and during the 0.026mm/s velocity shooting, the time plot of speed, pressure, position.Wherein, a line is the press slide rate curve; The b line is the press slide position curve; The c red line is the press slide pressure curve.Fig. 4 is a constant strain speed control design sketch of the present utility model.Be in the isothermal forging technology, constant strain speed-time curve figure.Wherein, the blue line of a is a press slide real-time speed curve; The b green line is a press slide setting speed curve.
Claims (4)
1. the ultra micro speed control system structure of a hydraulic press, include industrial computer (1), the master controller PLC (2) that is used to control hydraulic forging press that links to each other with industrial computer (1) by EPA, it is characterized in that: described master controller PLC (2) with by the proportional servo valve group (3) of its control, one end of proportioning pump group (4) links to each other, and proportional servo valve group (3), the other end of proportioning pump group (4) links to each other with hydraulic cylinder (6) by the hydraulic forging press of its driving, and hydraulic cylinder (6) is provided with the position sensor (5) that links to each other with master controller PLC (2) and the position signalling of hydraulic cylinder (6) is fed back to master controller PLC (2).
2. the ultra micro speed control system structure of hydraulic press according to claim 1 is characterized in that: described position sensor (5) links to each other with position input module among the master controller PLC (2).
3. the ultra micro speed control system structure of hydraulic press according to claim 1 is characterized in that: described proportional servo valve (3) links to each other with analog output module among the master controller PLC (2).
4. the ultra micro speed control system structure of hydraulic press according to claim 1 is characterized in that: described industrial computer (1) links to each other with ethernet communication module among the master controller PLC (2) by EPA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200986726U CN201120444Y (en) | 2007-09-27 | 2007-09-27 | Ultramicro-speed control structure of hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200986726U CN201120444Y (en) | 2007-09-27 | 2007-09-27 | Ultramicro-speed control structure of hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201120444Y true CN201120444Y (en) | 2008-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200986726U Expired - Lifetime CN201120444Y (en) | 2007-09-27 | 2007-09-27 | Ultramicro-speed control structure of hydraulic press |
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| Country | Link |
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| CN (1) | CN201120444Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430682A (en) * | 2011-09-20 | 2012-05-02 | 天津市天锻压力机有限公司 | Method for setting strain rate of high-temperature alloy forging hydraulic press |
| CN103272898A (en) * | 2013-05-22 | 2013-09-04 | 南通奥特机械设备有限公司 | Numerical control double-cylinder double-arm stretch bender |
| 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 |
-
2007
- 2007-09-27 CN CNU2007200986726U patent/CN201120444Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430682A (en) * | 2011-09-20 | 2012-05-02 | 天津市天锻压力机有限公司 | Method for setting strain rate of high-temperature alloy forging hydraulic press |
| CN102430682B (en) * | 2011-09-20 | 2014-08-06 | 天津市天锻压力机有限公司 | Method for setting strain rate of high-temperature alloy forging hydraulic press |
| CN103272898A (en) * | 2013-05-22 | 2013-09-04 | 南通奥特机械设备有限公司 | Numerical control double-cylinder double-arm stretch bender |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080924 |
|
| CX01 | Expiry of patent term |