CN102797715B - Oil cylinder control method - Google Patents
Oil cylinder control method Download PDFInfo
- Publication number
- CN102797715B CN102797715B CN201210308874.4A CN201210308874A CN102797715B CN 102797715 B CN102797715 B CN 102797715B CN 201210308874 A CN201210308874 A CN 201210308874A CN 102797715 B CN102797715 B CN 102797715B
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- China
- Prior art keywords
- motor
- controller
- oil cylinder
- turns
- pump
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Abstract
The invention relates to an oil cylinder control method. The rotation of a motor is firstly controlled by a controller, meanwhile a rotary coder detects a real rotating speed or the number of rotating turns of the motor and feeds back to the controller. The motor drives a constant delivery pump to work. The constant delivery pump discharges oil liquid. The oil liquid discharged by the constant delivery pump enters an oil inlet cavity after a control valve and drives a piston to move left. The controller is used for controlling the rotating speed of the motor, so that the output amount of a variable pump or the constant delivery pump is controlled, the displacement of an oil cylinder can be controlled accurately, the mechanical structure is simplified, and cost is reduced.
Description
Technical field
The present invention relates to the oil cylinder control field of machinery, particularly relate to a kind of oil cylinder controlling method.
Background technique
Oil cylinder is widely used in present machinery, general is all closed loop to the control of oil cylinder, the rod of i.e. oil cylinder is equipped with displacement transducer, the control of oil cylinder be by displacement transducer sender number to controller then controller complete the control to oil cylinder, but there is the oil cylinder that many needs rotate in practice, on these oil cylinders, installation position displacement sensor becomes very difficult, even cannot install, and so just cannot realize the accurate control to oil cylinder.
Disclosed in 28 days December in 2011, the patent No. is 201120128975.4, name is called in the utility model patent of servo control system of injection molding machine the control system mentioned as shown in Figure 1, comprise oil cylinder, oil pump, motor and controller, the centre of the cylinder body of described oil cylinder is provided with piston, cylinder body is divided into oil suction chamber and goes out oil pocket by described piston, the left side of described piston is connected with left piston bar between two parties, right side is connected with right piston rod between two parties, described oil suction chamber is connected with control valve by pipeline, described control valve is connected with metering pump, described metering pump is connected with fluid case with motor respectively, the described oil pocket that goes out is communicated with fluid case by pipeline, the side of described motor is connected and installed with rotating coder, described motor is all connected with controller with rotating coder.Only have the concrete structure of control system, do not disclose the controlling method of this control system, and the accurate movement of controlling method on oil cylinder has very important impact.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of oil cylinder controlling method, the displacement of energy Precise Control of Oil cylinder, successful.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of oil cylinder controlling method, step is as follows.
A () controller controls the rotation of motor, meanwhile, rotating coder detects the actual speed of motor or rotates the number of turns and feed back to controller;
B () motor driving metering pump works, fluid discharged by metering pump;
C fluid that () metering pump is discharged enters oil suction chamber after control valve, and fluid promotes piston and is moved to the left.
In described step (a), the work of motor is divided into M time period, T
mfor the working time of motor, then T
m=t
1+ t
2+ t
3+ ...+t
m, n
xfor t
xthe rotating speed of time period inner motor, N
mfor motor becomes the final required number of turns turned over, then N through the accumulated time of M section
m=n
1* t
1+ n
2* t
2+ n
3* t
3+ ...+n
m* t
m.
If controller controls motor keep certain rotating speed n, then N
m=n*T
m.
The fluid volume that in described step (b), metering pump is discharged is V, V=N
m* V
0, wherein V
0for the fluid amount that metering pump turns around discharged.
In described step (c), the sectional area of oil suction chamber is S
q=π * (A
2-B
2)/4, A are the diameter of section of right piston rod, and B is the diameter of section of left piston bar, the distance that piston is moved to the left: L=V/S
q=4N
m* V
0/ [π * (A
2-B
2)].
The number of turns N that described controller turns over by the feedback control motor of rotating coder
m, the displacement distance L of piston can by formula L=V/S
q=4N
m* V
0/ [π * (A
2-B
2)] draw.
Described metering pump can replace with variable displacement pump, described controller controllable variable pump delivery V
x, V
xfor t
xtime period internal variable pump turns around the mean value of discharged amount, T
mfor cumulative time, T
mthe total displacement of the variable displacement pump in the time is V, V=Δ V
1+ Δ V
2+ Δ V
3+ ...+Δ V
m=V
1* n
1* t
1+ V
2* n
2* t
2+ V
3* n
3* t
3+ ...+V
m* n
m* t
m, the rotating speed n of motor
xcan be controlled by controller, therefore the distance that piston is moved to the left: L=V/S
qjust can accurately control.
beneficial effect
The present invention relates to a kind of oil cylinder controlling method, adopt controller to control the rotating speed of motor, and then the output quantity of controlled variable pump or metering pump, the displacement of energy Precise Control of Oil cylinder, simplifies mechanical structure, reduces costs.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of device of the present invention;
Fig. 2 is the another kind of schematic diagram of device of the present invention.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiments of the present invention relate to a kind of oil cylinder controlling method, as shown in Figure 1-2, corresponding device comprises oil cylinder, oil pump, motor 4 and controller 6, the centre of the cylinder body 11 of described oil cylinder is provided with piston 12, cylinder body 11 is divided into oil suction chamber 15 and goes out oil pocket 16 by described piston 12, the left side of described piston 12 is connected with left piston bar 14 between two parties, right side is connected with right piston rod 13 between two parties, described oil suction chamber 15 is connected with control valve 2 by pipeline, described control valve 2 is connected with metering pump 3, described metering pump 3 is connected with fluid case 1 with motor 4 respectively, the described oil pocket 16 that goes out directly is communicated with fluid case 1 by pipeline, the side of described motor 4 is connected and installed with rotating coder 5, described motor 4 is all connected with controller 6 with rotating coder 5.
Embodiment 1
If the rotating speed that controller 6 controls motor 4 is constant n, the diameter B=300mm of the right hand piston bar 13 of oil cylinder, the diameter A=600mm of piston 12, the discharge capacity V of metering pump 3
0=16000mm
3/ r, if will control oil cylinder to move left L=10mm past, the number of turns that so motor 4 turns over is: N=(A
2-B
2) π/4*L/V
0=(600
2-300
2) π/4*10/16000=132.5, motor 4 will turn over 132.5 circles in other words, and what so controller 6 can control motor 4 is 2000r/min at constant rotational speed n, just completes the Bit andits control to oil cylinder through 3.98 seconds.
Embodiment 2
The diameter B=300mm of the right hand piston bar 13 of oil cylinder, the diameter A=600mm of piston 12, the discharge capacity V of metering pump 3
0=16000mm
3/ r, if will controlling oil cylinder 12 toward moving left L=10mm, only needing to control motor and turning over certain number of turns oil cylinder 12 just can be made to realize accurate displacement, and so motor 4 needs the number of turns turned over to be: N=(A
2-B
2) π/4*L/V
0=(600
2-300
2) π/4*10/16000=132.5 circle, so controller 6 controls motor 4 and rotates, and rotating coder 5 can feed back to controller 6 the lap information that motor 4 turns over simultaneously, completes the control to oil cylinder displacement when waiting the number of turns turned over to reach desirable value.
Claims (3)
1. a controlling method for oil cylinder, comprises the following steps:
A () controller (6) controls the rotation of motor (4), simultaneously, rotating coder (5) detects the actual speed of motor (4) or rotates the number of turns and feed back to controller (6), the work of motor (4) is divided into M time period, T
mfor the working time of motor (4), then T
m=t
1+ t
2+ t
3+ ...+t
m, n
xfor t
xthe mean speed of time period inner motor (4), N
mfor motor (4) becomes the final required number of turns turned over, then N through the accumulated time of M section
m=n
1* t
1+ n
2* t
2+ n
3* t
3+ ...+n
m* t
m;
B () motor (4) drives metering pump (3) work, fluid discharged by metering pump (3), and the fluid volume that metering pump (3) is discharged is V, V=N
m* V
0, wherein V
0for the fluid amount that metering pump (3) turns around discharged;
C fluid that () metering pump (3) is discharged enters oil suction chamber (15) after control valve (2), and fluid promotes piston (12) and is moved to the left, and the sectional area of oil suction chamber (15) is S
q=π * (A
2-B
2)/4, A are the diameter of section of right piston rod (13), and B is the diameter of section of left piston bar (14), the distance that piston (12) is moved to the left: L=V/S
q=4N
m* V
0/ [π * (A
2-B
2)], the number of turns N that described controller (6) turns over by the feedback control motor (4) of rotating coder (5)
m.
2. a kind of oil cylinder controlling method according to claim 1, is characterized in that: if controller (6) controls motor (4) keep certain rotating speed n, then N
m=n*T
m.
3. a kind of oil cylinder controlling method according to claim 1, is characterized in that: described metering pump (3) can replace with variable displacement pump (7), the discharge capacity V of described controller (6) controllable variable pump (7)
x, V
xfor t
xtime period internal variable pump (7) turns around the mean value of discharged amount, T
mfor cumulative time, T
mthe total displacement of the variable displacement pump (7) in the time is V, V=Δ V
1+ Δ V
2+ Δ V
3+ ...+Δ V
m=V
1* n
1* t
1+ V
2* n
2* t
2+ V
3* n
3* t
3+ ...+V
m* n
m* t
m, the rotating speed n of motor (4)
xcan be controlled by controller (6), therefore the distance that piston (12) is moved to the left: L=V/S
qjust can accurately control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210308874.4A CN102797715B (en) | 2012-08-27 | 2012-08-27 | Oil cylinder control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210308874.4A CN102797715B (en) | 2012-08-27 | 2012-08-27 | Oil cylinder control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102797715A CN102797715A (en) | 2012-11-28 |
| CN102797715B true CN102797715B (en) | 2015-04-29 |
Family
ID=47196961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210308874.4A Expired - Fee Related CN102797715B (en) | 2012-08-27 | 2012-08-27 | Oil cylinder control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102797715B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658805A (en) * | 2020-12-16 | 2021-04-16 | 东莞市埃弗米数控设备科技有限公司 | Flow pulse counter and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100105A (en) * | 2007-07-12 | 2008-01-09 | 昌盛达机械(浙江)有限公司 | Injection moulding machine servo energy-saving control system |
| CN101367262A (en) * | 2008-08-22 | 2009-02-18 | 昌盛达机械(浙江)有限公司 | Servo energy conservation power system of hollow molding machine |
| CN201816198U (en) * | 2010-06-29 | 2011-05-04 | 泰瑞机器制造(中国)有限公司 | Servo energy-saving device of injection molding machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6126401A (en) * | 1998-08-12 | 2000-10-03 | Computer Graphics Systems Development Corporation | Hybrid electric/hydraulic drive system |
| CN201288657Y (en) * | 2008-09-28 | 2009-08-12 | 海特克液压有限公司 | Electro-hydraulic integration dual chamber power variant control apparatus |
| CN101503998A (en) * | 2008-09-28 | 2009-08-12 | 海特克液压有限公司 | Electrohydraulic integrating dual-displacement variable power control system |
| CN201415463Y (en) * | 2009-05-21 | 2010-03-03 | 宁波弘讯科技有限公司 | Energy-saving high-precision gas-electric hybrid injection molding machine |
| JP5587568B2 (en) * | 2009-07-14 | 2014-09-10 | 東洋機械金属株式会社 | Die casting machine |
| CN202088419U (en) * | 2011-04-20 | 2011-12-28 | 宁波高新区安立特电气科技有限公司 | Servo control system of injection molding machine |
| CN202867368U (en) * | 2012-08-27 | 2013-04-10 | 刘镇江 | Oil cylinder control device |
-
2012
- 2012-08-27 CN CN201210308874.4A patent/CN102797715B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100105A (en) * | 2007-07-12 | 2008-01-09 | 昌盛达机械(浙江)有限公司 | Injection moulding machine servo energy-saving control system |
| CN101367262A (en) * | 2008-08-22 | 2009-02-18 | 昌盛达机械(浙江)有限公司 | Servo energy conservation power system of hollow molding machine |
| CN201816198U (en) * | 2010-06-29 | 2011-05-04 | 泰瑞机器制造(中国)有限公司 | Servo energy-saving device of injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102797715A (en) | 2012-11-28 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20190827 |