CN103008608A - Pressure boost adjusting device and method based on on-line control of die-casting machine - Google Patents
Pressure boost adjusting device and method based on on-line control of die-casting machine Download PDFInfo
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- CN103008608A CN103008608A CN2012105940828A CN201210594082A CN103008608A CN 103008608 A CN103008608 A CN 103008608A CN 2012105940828 A CN2012105940828 A CN 2012105940828A CN 201210594082 A CN201210594082 A CN 201210594082A CN 103008608 A CN103008608 A CN 103008608A
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Abstract
The invention discloses a pressure boost adjusting device and method based on on-line control of a die-casting machine. The device comprises an injection cylinder, a pressure boost cylinder, a cartridge flow valve, a pressure ejector controller and a servo motor, wherein the pressure ejector controller controls the boost pressure of the pressure boost cylinder through the cartridge flow valve; a pressure sensor used for detecting pressure signals is arranged in the injection cylinder, and is connected with the input terminal of the pressure ejector controller; an optical grating ruler is arranged on the injection cylinder, and is connected with the pressure ejector controller; the cartridge flow valve is connected to the pressure boost cylinder; the pressure ejector controller is electrically connected with the servo motor; and the servo motor is in transmission connection with the cartridge flow valve. The device can control the pressure boost process of the die casting machine on line, so as to enable the pressure to fluctuate within the required pressure curve range to effectively ensure that a die casting has a compact organizational structure and good mechanical properties, while the molding of die castings with complex shapes can be met, thereby significantly improving the yield of die castings.
Description
Technical field
The present invention relates to a kind of die casting machine, particularly based on pressurized regulating device and the method for die casting machine On-line Control.
Background technology
The pressurization of die casting machine is to guarantee that foundry goods obtains the critical process of fine and close institutional framework and good mechanical performance, and late molten metal solidifies fully or boost pressure is inadequate if pressurization time is crossed, and pressurization is with ineffective; And if the metal ot-yet-hardened just forms excessive boost pressure fast, might cause hydraulic shock to increase swollen type power, form the clamp force deficiency and produce swollen type or finning, thereby weaken pressurized effect, the Pressure control of existing die casting machine is finished by supercharging accumulator loop and pressurized cylinder, the Pressure control system is generally by the electric-hydraulic proportion flow control valve, pressure sensor and controller consist of, in control procedure, change the aperture of flow control valve by the size of current of regulating proportion electro-magnet, thereby the control uninterrupted is in time regulated boost pressure, because in practical work process, because load, oil temperature, charge oil pressure fluctuations etc. can produce pressurization and disturb, therefore how the aperture of online dynamic adjustments flow control valve, improving pressurized effect is the problem that this patent solves.
Summary of the invention
The objective of the invention is to provide in order to solve above-mentioned the deficiencies in the prior art a kind of pressurization that can the On-line Control die casting machine, its pressure is fluctuateed in needs pressure curve scope, can guarantee effectively that foundry goods obtains closely institutional framework and good mechanical performance, simultaneously the moulding of complicated shape die casting be can satisfy, thereby pressurized regulating device and the method based on the die casting machine On-line Control of the yield rate of die casting significantly improved.
To achieve these goals, the pressurized regulating device based on the die casting machine On-line Control that the present invention is designed, comprise shot sleeve, pressurized cylinder, the plug-in mounting flow valve, injection device controller and servomotor, described injection device controller is by the boost pressure of plug-in mounting flow valve control pressurized cylinder, in shot sleeve, be provided with the pressure sensor of detected pressures signal, described pressure sensor is connected with the input of injection device controller, at shot sleeve grating scale is housed, described grating scale is connected with injection device controller, described plug-in mounting flow valve is connected with pressurized cylinder, described injection device controller is electrically connected with servomotor, and described servomotor and plug-in mounting flow valve are in transmission connection.
Described plug-in mounting flow valve comprises cover plate, push rod, spool and cushion block, described plug-in mounting flow valve is connected with pressurized cylinder by push rod, be provided with adjusting screw(rod) at servomotor, and described servomotor is connected with push rod by adjusting screw(rod), described spool is placed in outside the push rod, and spool one side is provided with valve pocket, is fixedly connected with by cushion block between described cover plate and the push rod.
Described servomotor is installed on the cover board.
Be provided with seat board at shot sleeve, be provided with support plate at seat board, described grating scale is installed on the support plate.
Described injection device controller comprises comparing element unit, D/A converting unit and servo controller unit, the input of described comparing element unit is connected with grating scale with pressure sensor simultaneously, the output of described comparing element unit is connected with the input of D/A converting unit, the output of described D/A converting unit is connected with the servo controller unit, and the servo controller unit is electrically connected with servomotor.
A kind of load control method based on the die casting machine On-line Control may further comprise the steps:
(a) thus the displacement signal that detects the injection punch head after the shot sleeve injection is finished by grating scale starts position signalling to pressurized cylinder is provided, thereby and obtain each constantly injection punch head distance, speed and three curves of boost pressure in conjunction with detect the shot sleeve pressure signal by pressure sensor, and draw the increasing pressure curve of non-defective unit in conjunction with the finished product state of each product;
(b) take the increasing pressure curve that calculates as foundation, if just carry out on-line control when pressure measuring value in the process surpasses this increasing pressure curve positive and negative deviation 5%: detect the displacement signal of injection punch head shot sleeve injection finish after and in conjunction with pressure signal that pressure sensor provide simultaneously be transferred to injection device controller by grating scale this moment, through being transferred to the servo controller unit after the signal processing variation, the servo controller unit sends instruction and realizes the servomotor running, and carry out Real-time Feedback by pressure sensor, servomotor just can directly drive adjusting screw(rod) and promote the aperture size that push rod is regulated the plug-in mounting flow valve in real time, thereby supplies with the hydraulic power oil that pressurized cylinder meets real-time supercharging requirement; The pressure signal that provides by the displacement signal that provided by grating scale and pressure sensor is controlled simultaneously supercharging and is started, the aperture of plug-in mounting flow valve is to regulate by servomotor, thereby realize that supercharging starts, boost pressure is adjustable more flexibly, and in running repeatedly, according to real-time situation of change, automatic regulating valve mouth aperture size also can fluctuate in error range according to increasing pressure curve in opening process next time, can effectively eliminate shrinkage cavity and the pore of foundry goods inside, improve compactness, reduce the casting of owing of foundry goods outside, the quality problems such as cold shut and profile are unintelligible, the rate of reducing the number of rejects and seconds.
Pressurized regulating device and method based on the die casting machine On-line Control that the present invention obtains, pressurization that can the On-line Control die casting machine, its pressure is fluctuateed in needs pressure curve scope, can guarantee effectively that foundry goods obtains closely institutional framework and good mechanical performance, simultaneously can satisfy the moulding of complicated shape die casting, thereby significantly improve the yield rate of die casting.
Description of drawings
Fig. 1 is the structure principle chart of embodiment 1;
Fig. 2 is the structural representation of embodiment 2;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is the structure principle chart of embodiment 3;
Fig. 5 is the structure principle chart of embodiment 4.
Among the figure: pressure sensor 1, pressurized cylinder 2, plug-in mounting flow valve 3, injection device controller 4, servomotor 5, grating scale 6, comparing element unit 7, D/A converting unit 8, servo controller unit 9, cover plate 10, push rod 11, spool 12, cushion block 13, valve pocket 14, adjusting screw(rod) 15, shot sleeve 16, seat board 17, support plate 18.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1:
As shown in Figure 1, pressurized regulating device based on the die casting machine On-line Control provided by the invention, comprise shot sleeve 16, pressurized cylinder 2, plug-in mounting flow valve 3, injection device controller 4 and servomotor 5, described injection device controller 4 is by the boost pressure of plug-in mounting flow valve 3 control pressurized cylinders 2, in shot sleeve 16, be provided with the pressure sensor 1 of detected pressures signal, described pressure sensor 1 is connected with the input of injection device controller 4, at shot sleeve 16 grating scale 6 is housed, described grating scale 6 is connected with injection device controller 4, described plug-in mounting flow valve 3 is connected with pressurized cylinder 2, described injection device controller 4 is electrically connected with servomotor 5, and described servomotor 5 is in transmission connection with plug-in mounting flow valve 3.
Embodiment 2:
Such as Fig. 2, as shown in Figure 3, the general configuration of present embodiment is consistent with embodiment 1, different is that described plug-in mounting flow valve 3 comprises cover plate 10, push rod 11, spool 12 and cushion block 13, described plug-in mounting flow valve 3 is connected with pressurized cylinder 2 by push rod 1, be provided with adjusting screw(rod) 15 at servomotor 5, and described servomotor 5 is connected with push rod 11 by adjusting screw(rod) 15, described spool 12 is placed in outside the push rod 11, and spool 12 1 sides are provided with valve pocket 14, are fixedly connected with by cushion block 13 between described cover plate 10 and the push rod 11; Described servomotor 5 is installed on the cover plate 10;
Embodiment 3:
As shown in Figure 4, the general configuration of present embodiment is consistent with embodiment 2, and different is to be provided with seat board 17 at shot sleeve 16, is provided with support plate 18 at seat board 17, and described grating scale 6 is installed on the support plate 18.
Embodiment 4:
As shown in Figure 5, the general configuration of present embodiment is consistent with embodiment 2, different is to design as preferred version in the present embodiment, described injection device controller 4 comprises comparing element unit 7, D/A converting unit 8 and servo controller unit 9, the input of described comparing element unit 7 is connected with grating scale with pressure sensor 1 simultaneously and is connected, the output of described comparing element unit 7 is connected with the input of D/A converting unit 8, the output of described D/A converting unit 8 is connected with servo controller unit 9, and servo controller unit 9 is electrically connected with servomotor 5.
In real work, die casting machine 16 is after injection is finished, aluminium alloy has been full of mold cavity, and injection plunger must be used the molten metal of ot-yet-hardened in the larger pressure pushing die die cavity immediately, make the foundry goods interior tissue of own moulding finer and close, pressurization that Here it is, the size of boost pressure is determined by formula (1).
Above-mentioned formula 1. in:
P1 one acts on the pressure of motlten metal in the die cavity
P2 one injection chamber oil pressure
P3 one pressurized cylinder oil pressure
D1 one shot sleeve diameter
D2 one pressurized cylinder piston shank diameter
D3 one pressurized cylinder diameter
D4 one punch diameter
In general die casting machine 16 systems, Pressure control generally is made of electric-hydraulic proportion flow control valve, pressure sensor 1 and controller, in control procedure, change the aperture of flow control valve by the size of current of regulating proportion electro-magnet, be the 2. determined x of flow continuity equation formula of pressurized cylinder, just can regulate boost pressure.
In above-mentioned formula (2) formula:
K one fluid elastic modelling quantity
Oil liquid pressure in Pf one accumulator
Cd one discharge coefficient
The gain of wx one inserted valve valve port opening
Pa one pressurized cylinder oil pressure
ρ one fluid density
The movement velocity of v one pressurized cylinder piston
The large chamber of Va one pressurized cylinder volume
X one inserted valve valve port opening
The effective work area of A one pressurized cylinder
After generally having calculated the aperture size, the size of current of inputting is just determined, but owing to the interference that Hydrauservo System is suffered is a lot, exert an influence such as the output of the meetings such as load, oil temperature, charge oil pressure fluctuation to system, and the dynamic change of general system after can't the improvement system being disturbed, the closed loop transfer function, of this pressure charging system is
Above-mentioned formula is 3. in the formula:
The undamped natural frequency of a mechanical system of ω n-pressurized cylinder;
The damping ratio of ζ-pressurized cylinder working chamber;
The leadage coefficient of K1-pressurized cylinder working chamber;
V-hydraulic cylinder works chamber and oil inlet pipe inner fluid volume;
B---viscous damping coefficient;
Present embodiment provides a kind of load control method based on the die casting machine On-line Control, may further comprise the steps:
(a) thus the displacement signal that detects the injection punch head after shot sleeves 16 injections are finished by grating scale 6 starts position signalling to pressurized cylinder 2 is provided, thereby and obtain each constantly injection punch head distance, speed and three curves of boost pressure in conjunction with detect shot sleeve 16 pressure signals by pressure sensor 1, and draw the increasing pressure curve of non-defective unit in conjunction with the finished product state of each product;
(b) take the increasing pressure curve that calculates as foundation, if just carry out on-line control when pressure measuring value in the process surpasses this increasing pressure curve positive and negative deviation 5%: detect the displacement signal of injection punch head shot sleeve 16 injections finish after and in conjunction with pressure signal that pressure sensor 1 provide simultaneously be transferred to injection device controller 4 by grating scale 6 this moment, through being transferred to servo controller unit 9 after the signal processing variation, servo controller unit 9 sends instruction and realizes servomotor 5 runnings, and carry out Real-time Feedback by pressure sensor 1, servomotor 5 just can directly drive adjusting screw(rod) 15 and promote the aperture size that push rod 15 is regulated plug-in mounting flow valve 3 in real time, thereby supplies with the hydraulic power oil that pressurized cylinder 2 meets real-time supercharging requirement.
Claims (8)
1. pressurized regulating device based on the die casting machine On-line Control, it is characterized in that: comprise shot sleeve (16), pressurized cylinder (2), plug-in mounting flow valve (3), injection device controller (4) and servomotor (5), described injection device controller (4) is by the boost pressure of plug-in mounting flow valve (3) control pressurized cylinder (2), in shot sleeve (16), be provided with the pressure sensor (1) of detected pressures signal, described pressure sensor (1) is connected with the input of injection device controller (4), at shot sleeve (16) grating scale (6) is housed, described grating scale (6) is connected with injection device controller (4), described plug-in mounting flow valve (3) is connected with pressurized cylinder (2), described injection device controller (4) is electrically connected with servomotor (5), and described servomotor (5) is in transmission connection with plug-in mounting flow valve (3).
2. the pressurized regulating device based on the die casting machine On-line Control according to claim 1, it is characterized in that: described plug-in mounting flow valve (3) comprises cover plate (10), push rod (11), spool (12) and cushion block (13), described plug-in mounting flow valve (3) is connected with pressurized cylinder (2) by push rod (11), be provided with adjusting screw(rod) (15) at servomotor (5), and described servomotor (5) is connected with push rod (11) by adjusting screw(rod) (15), described spool (12) is placed in outside the push rod (11), and spool (12) one sides are provided with valve pocket (14), are fixedly connected with by cushion block (13) between described cover plate (10) and the push rod (11).
3. the pressurized regulating device based on the die casting machine On-line Control according to claim 1 and 2, it is characterized in that: described servomotor (5) is installed on the cover plate (10).
4. the pressurized regulating device based on the die casting machine On-line Control according to claim 1 and 2, it is characterized in that: be provided with seat board (17) at shot sleeve (16), be provided with support plate (18) at seat board (17), described grating scale (6) is installed on the support plate (18).
5. the pressurized regulating device based on the die casting machine On-line Control according to claim 1 and 2, it is characterized in that: described injection device controller (4) comprises comparing element unit (7), D/A converting unit (8) and servo controller unit (9), the input of described comparing element unit (7) is connected 6 with pressure sensor (1) with grating scale simultaneously) be connected, the output of described comparing element unit (7) is connected with the input of D/A converting unit (8), the output of described D/A converting unit (8) is connected with servo controller unit (9), and servo controller unit (9) are electrically connected with servomotor (5).
6. the pressurized regulating device based on the die casting machine On-line Control according to claim 3, it is characterized in that: described injection device controller (4) comprises comparing element unit (7), D/A converting unit (8) and servo controller unit (9), the input of described comparing element unit (7) is connected 6 with pressure sensor (1) with grating scale simultaneously) be connected, the output of described comparing element unit (7) is connected with the input of D/A converting unit (8), the output of described D/A converting unit (8) is connected with servo controller unit (9), and servo controller unit (9) are electrically connected with servomotor (5).
7. the pressurized regulating device based on the die casting machine On-line Control according to claim 4, it is characterized in that: described injection device controller (4) comprises comparing element unit (7), D/A converting unit (8) and servo controller unit (9), the input of described comparing element unit (7) is connected 6 with pressure sensor (1) with grating scale simultaneously) be connected, the output of described comparing element unit (7) is connected with the input of D/A converting unit (8), the output of described D/A converting unit (8) is connected with servo controller unit (9), and servo controller unit (9) are electrically connected with servomotor (5).
8. load control method based on the die casting machine On-line Control is characterized in that: may further comprise the steps:
(a) detect shot sleeve (16) by grating scale (6) thus the displacement signal of the injection punch head after injection is finished starts position signalling to pressurized cylinder (2) is provided, and in conjunction with detecting shot sleeve (16) by pressure sensor (1) thus pressure signal obtains each constantly injection punch head distance, speed and three curves of boost pressure, and draw the increasing pressure curve of non-defective unit in conjunction with the each finished product state of product;
(b) take the increasing pressure curve that calculates as foundation, if just carry out on-line control when pressure measuring value in the process surpasses this increasing pressure curve positive and negative deviation 5%: detect the displacement signal of injection punch head shot sleeve (16) injection finish after and in conjunction with pressure signal that pressure sensor (1) provide simultaneously be transferred to injection device controller (4) by grating scale (6) this moment, through being transferred to servo controller unit (9) after the signal processing variation, servo controller unit (9) sends instruction and realizes servomotor (5) running, and carry out Real-time Feedback by pressure sensor (1), servomotor (5) just can directly drive adjusting screw(rod) (15) and promote the aperture size that push rod (15) is regulated plug-in mounting flow valve (3) in real time, thereby supplies with the hydraulic power oil that pressurized cylinder (2) meets real-time supercharging requirement.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104121255A (en) * | 2014-07-18 | 2014-10-29 | 国家电网公司 | Electric-hydraulic proportional loop system |
| CN106001492A (en) * | 2016-08-05 | 2016-10-12 | 富乐压铸(太仓)有限公司 | Production process of high-compactness automobile vibration attenuation balance weight block |
| CN110548854A (en) * | 2019-10-23 | 2019-12-10 | 广东宝洋科技有限公司 | Forging control method for metal product |
| CN111604487A (en) * | 2020-04-24 | 2020-09-01 | 宁夏煜隆科技有限公司 | Environment-friendly energy-saving die casting machine electrohydraulic control system |
| CN116765352A (en) * | 2022-01-26 | 2023-09-19 | 邓少聪 | Vertical-punching die casting machine for die casting stainless steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110548854A (en) * | 2019-10-23 | 2019-12-10 | 广东宝洋科技有限公司 | Forging control method for metal product |
| CN110548854B (en) * | 2019-10-23 | 2021-12-10 | 广东宝洋科技有限公司 | Forging control method for metal product |
| CN111604487A (en) * | 2020-04-24 | 2020-09-01 | 宁夏煜隆科技有限公司 | Environment-friendly energy-saving die casting machine electrohydraulic control system |
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| CN116765352A (en) * | 2022-01-26 | 2023-09-19 | 邓少聪 | Vertical-punching die casting machine for die casting stainless steel |
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| CN103008608B (en) | 2015-01-07 |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 699 Jinghua Road, High tech Zone, Ningbo City, Zhejiang Province, 315103 Patentee after: SIJIN INTELLIGENT FORMING MACHINERY CO.,LTD. Address before: 315103 1832 Jiangnan Road, Ningbo high tech Zone, Zhejiang Patentee before: SIJIN INTELLIGENT FORMING MACHINERY CO.,LTD. |