CN1304622C - Automatic control device of liquid solid extrusion metal base composite material - Google Patents
Automatic control device of liquid solid extrusion metal base composite material Download PDFInfo
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- CN1304622C CN1304622C CN 200410073448 CN200410073448A CN1304622C CN 1304622 C CN1304622 C CN 1304622C CN 200410073448 CN200410073448 CN 200410073448 CN 200410073448 A CN200410073448 A CN 200410073448A CN 1304622 C CN1304622 C CN 1304622C
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Abstract
The present invention discloses an automatic control device of a liquid solid extrusion metal base composite material, which comprises an oil tank (1), an oil pump (2), an overflow valve (3), a pressure sensor (13), a displacement sensor (14), a temperature sensor (15), an electro-hydraulic proportional valve (5), a digital pressure compensator (4), an A/D converter (16), a digital differential device (17), a controller (18) and a D/A converter (19), wherein one end of the oil path of the digital pressure compensator (4) is connected with the oil pump (2), the other end is connected with the oil path of the electro-hydraulic proportional valve (5), and the other end of the oil path of the electro-hydraulic proportional valve (5) is connected with a hydraulic machine (6); circuits of the electro-hydraulic proportional valve (5) and the digital pressure compensator (4) are electrically connected with the controller (18) through the D/A converter (19), and the pressure sensor (13), the displacement sensor (14) and the temperature sensor (15) are electrically connected with the controller (18) through the A/D converter (16). The quality of the metal base composite material which is prepared by using the device of the present invention is improved, the surface is smooth, and the crack performance does not occur.
Description
Technical field
The present invention relates to a kind of automatic control device of liquid solid extrusion metal base composite material.
Background technology
It is a kind of metal-base composites novel preparation method of developing in recent years that liquid-solid extrusion process prepares metal-base composites, it combines the characteristics of liquid forging and solid-state extrusion, realized liquid metal infiltration, crystallization in fiber preform under pressure, solidified, and when liquid-solid attitude, be extruded, stand large plastometric set, material property is improved greatly, and compare with solid-state extrusion, plastic force greatly reduces, and has saved the energy.Liquid-solid extrusion process does not need Special Equipment, and common press adds extrusion mould can be realized, and is therefore easy to utilize.When yet liquid-solid extrusion process prepared metal-base composites, to solid-state continuous variation, extrusion speed needed with the carrying out and constantly adjust of extrusion process the blank state from liquid state, and is suitable to guarantee extrusion exit liquid, solid-state ratio.
Document " Hu Lianxi; Luo Shoujing; Huo Wencan; liquid infiltration back is the Load-displacement Characteristics of Ram of extrusion process directly; " light alloy processing technology " 1998; Vol.26, No.10, pp43-46 " to introduce; liquid-solid extrusion experiment device is by die; liquid-solid attitude matrix material blank; punch; hydropress and displacement; temperature, the open loop system that pressure signal gathering device etc. are formed, hydropress as whole process system topworks, its electrical control system mostly is the relay logic sequential control, extrusion speed only has F.F., the worker advances, slow-motion, limited several speed such as rewind down, can not adapt to liquid-solid extrusion process to the requirement of extrusion speed continually varying, the operator can only rule of thumb manually control extrusion process by the hydropress supervisory control desk, and then the control forming quality.Cause liquid-solid attitude matrix material Deformation velocity and setting rate difficult coordination, influenced the forming quality that liquid-solid extrusion process prepares metal-base composites.If extrusion speed is too fast, the liquid ratio in extrusion exit is higher, and the liquid metal that does not solidify is fully extruded in advance, causes extrusion process to be interrupted; Extrusion speed is slow excessively, and liquid metal solidifies fully, and the solid-state ratio of extrusion exit is higher, becomes solid-state extrusion, and squeeze is increased, and has lost the advantage of liquid-solid extruding.Hence one can see that, and the size of extrusion speed is relevant with the state of blank, and when producing in batches, the extrusion speed in the reply extrusion process carries out stepless control.If adopt special-purpose liquid-solid extrusion equipment will increase preparation cost, be unfavorable for its extensive market of investing.
Summary of the invention
In order to overcome the deficiency that prior art can only manually be controlled, the invention provides a kind of automatic control device of liquid solid extrusion metal base composite material, having now under the constant substantially situation of hydropress main machine structure and hydraulic efficiency system, automatically controlled part is increased by a control device.Only needing increases annexes such as controller, electro-hydraulic proportional valve and digital pressure compensation device on the basis of original liquid-solid extrusion processing system, can realize the closed-loop control of liquid-solid extrusion speed.
The technical solution adopted for the present invention to solve the technical problems is: a kind of automatic control device of liquid solid extrusion metal base composite material, comprise oil pump 2, digital pressure compensation device 4, electro-hydraulic proportional valve 5, pressure transmitter 13, displacement sensor 14, temperature sensor 15, A/D converter 16 and D/A converter 19, particularly also comprise numerical differentiation 17; The oil circuit one termination oil pump 2 of digital pressure compensation device 4, the oil circuit of another termination electro-hydraulic proportional valve 5, another termination hydropress 6 of the oil circuit of electro-hydraulic proportional valve 5; The circuit of electro-hydraulic proportional valve 5 and digital pressure compensation device 4 is electrically connected with controller 18 by D/A converter 19, pressure transmitter 13 and temperature sensor 15 are electrically connected with controller 18 by A/D converter 16, displacement sensor 14 is by behind the A/D converter, link with numerical differentiation 17, obtain the downstream rate of press, import controller 18 at last.
The invention has the beneficial effects as follows, owing to adopt the integrated control of controller, make extrusion speed realize closed-loop control, the metal-base composites quality of liquid-solid extrusion process preparation is improved, and smooth surface does not have crack performance and takes place.The quality of metal-base composites no longer is subjected to influencing at random of human factor, can realize producing fast in batches.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the synoptic diagram of structure of the present invention
1. fuel tanks among the figure, 2. oil pump, 3. surplus valve, 4. digital pressure compensation device, 5. electro-hydraulic proportional valve, 6. hydropress, the 7. moving beam of press, 8. pressure transmitter installation position, 9. punch, 10. die, 11. liquid-solid attitude matrix material blank, 12. Workbench bases, 13. pressure transmitters, 14. displacement sensor, 15. temperature sensors, 16.A/D analog to digital converter, 17. numerical differentiation, 18. controllers, 19.D/A digital to analog converter.
Embodiment
With reference to Fig. 1.On the working connection between original hydropress hydro-cylinder and the oil pump, increase electro-hydraulic proportional valve and digital pressure device loop expansion pipe topworks, realize the automatic control of liquid-solid extrusion speed by the flow of control working connection as control device.Controller is the whole controlling system center, and its input signal is the given curve of pressure, displacement, temperature feedback signal and liquid-solid extrusion speed from transmitter, and its output signal comprises the control signal of electro-hydraulic proportional valve and digital pressure compensation device.In the liquid-solid extrusion process, controller is according to liquid-solid extrusion speed given curve and pressure, displacement, temperature signal are carried out the pressure difference after the pressure reduction identification, under the support of special software, determine the electronic work and the outward current of electro-hydraulic proportional valve and digital pressure compensation device magnet coil, make the extruding punch by given liquid-solid extrusion speed curve and direction motion.Mode of connection between each parts as shown in Figure 1, be electrically connected through D/A converter between electro-hydraulic proportional valve, digital pressure compensation device and the controller, be electrically connected through A/D converter between controller and the transmitter, controller is responsible for the pressure, displacement, temperature signal of processes sensor collection and electro-hydraulic proportional valve and digital pressure compensation device is controlled in real time, presses the given speed curvilinear motion to guarantee extrusion speed.Detailed process is, at first the extrusion speed curve of gathering when in the past preparing metal-base composites, choose the given curve of successful case as liquid-solid extrusion speed, input signal as controller, from the signal of displacement sensor after numerical differentiation, obtain extrusion speed, as the feedback speed signal of controller.On the other hand, displacement, pressure and temperature feedback signal obtain the pressure reduction predictor of digital pressure compensation device after by the pressure reduction model identification, as the actuating signal of control figure pressure compensator.Liquid-solid extruding controller, under special software is supported, provide control signal according to feedback signal and input signal for digital pressure compensation device and electro-hydraulic proportional valve, digital pressure compensation device and electro-hydraulic proportional valve move under controller action, thereby drive hydropress by given liquid-solid extrusion speed motion, thereby realize the automatic control of liquid-solid extrusion speed.
The present invention includes electro-hydraulic proportional valve 5, digital pressure compensation device 4, D/A converter 19, controller 18, numerical differentiation 17, A/D converter 16, pressure transmitter 13, displacement sensor 14 and temperature sensor 15.The variation that pressure transmitter 13, displacement sensor 14 and temperature sensor 15 are gathered processing parameter in the liquid-solid extrusion process, for the pressure reduction of controller predicted figure pressure compensator 4 provides real-time process data, provide the feedback input signal of extrusion speed simultaneously for controller.A/D converter 16 is responsible for the analog signal conversion that pressure transmitter 13, displacement sensor 14 and temperature sensor 15 are gathered is become numerary signal, and passes to controller 18.Controller 18 is according to the pressure, speed, the temperature signal that receive, calculate digital pressure compensation device 4 and electro-hydraulic proportional valve 5 next action command constantly, and convert simulating signal to by D/A converter 19, pass to electro-hydraulic proportional valve 5 and digital pressure compensation device 4 respectively.The digital pressure compensation device is installed on the working connection between oil pump 2 and the electro-hydraulic proportional valve 5, and its effect is to make the influence that only is subjected to its aperture by the flow of electro-hydraulic proportional valve 5.Electro-hydraulic proportional valve 5 is installed on the working connection between digital pressure compensation device 4 and the hydropress 6, it is core of the present invention, play the effect of regulating the working connection flow, thereby control the downstream rate of hydropress moved cross beam, thereby realize the automatic control of extrusion speed in the liquid-solid extrusion process.
Claims (1)
1, a kind of automatic control device of liquid solid extrusion metal base composite material, comprise oil pump (2), digital pressure compensation device (4), electro-hydraulic proportional valve (5), pressure transmitter (13), displacement sensor (14), temperature sensor (15), A/D converter (16) and D/A converter (19), it is characterized in that: also comprise numerical differentiation (17); The oil circuit one termination oil pump (2) of digital pressure compensation device (4), the oil circuit of another termination electro-hydraulic proportional valve (5), another termination hydropress (6) of the oil circuit of electro-hydraulic proportional valve (5); The circuit of electro-hydraulic proportional valve (5) and digital pressure compensation device (4) is electrically connected with controller (18) by D/A converter (19), pressure transmitter (13) and temperature sensor (15) are electrically connected with controller (18) by A/D converter (16), displacement sensor (14) is electrically connected with controller (18) through numerical differentiation (17) by A/D converter (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073448 CN1304622C (en) | 2004-12-22 | 2004-12-22 | Automatic control device of liquid solid extrusion metal base composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073448 CN1304622C (en) | 2004-12-22 | 2004-12-22 | Automatic control device of liquid solid extrusion metal base composite material |
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| Publication Number | Publication Date |
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| CN1624184A CN1624184A (en) | 2005-06-08 |
| CN1304622C true CN1304622C (en) | 2007-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410073448 Expired - Fee Related CN1304622C (en) | 2004-12-22 | 2004-12-22 | Automatic control device of liquid solid extrusion metal base composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114675A (en) * | 2010-12-25 | 2011-07-06 | 大连橡胶塑料机械股份有限公司 | Electrical control system of constant pressure-type hydraulic pitch-adjusting device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784810B (en) * | 2012-08-16 | 2015-04-08 | 广东富华重工制造有限公司 | Control system of car axle extrusion molding device |
| CN104500472B (en) * | 2014-10-20 | 2016-08-24 | 浙江大学 | A kind of controller of electric liquid ratio valve of Sensor Temperature Compensation |
| CN106287804B (en) * | 2015-05-29 | 2019-01-04 | 西门子（中国）有限公司 | combustion control system |
| CN106762918A (en) * | 2017-03-13 | 2017-05-31 | 重庆江东机械有限责任公司 | A kind of quick response topping up valve system with position control |
| CN111167909A (en) * | 2020-01-03 | 2020-05-19 | 北京科技大学 | High-performance component twisting-extruding forming device |
| CN114769491A (en) * | 2022-04-29 | 2022-07-22 | 中国重型机械研究院股份公司 | Intelligent speed regulation control system and method for large die forging press |
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2004
- 2004-12-22 CN CN 200410073448 patent/CN1304622C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114675A (en) * | 2010-12-25 | 2011-07-06 | 大连橡胶塑料机械股份有限公司 | Electrical control system of constant pressure-type hydraulic pitch-adjusting device |
| CN102114675B (en) * | 2010-12-25 | 2013-08-28 | 大连橡胶塑料机械股份有限公司 | Electrical control system of constant pressure-type hydraulic pitch-adjusting device |
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| CN1624184A (en) | 2005-06-08 |
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