CN213291485U - Servo bender actuating system - Google Patents
Servo bender actuating system Download PDFInfo
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- CN213291485U CN213291485U CN202021724372.6U CN202021724372U CN213291485U CN 213291485 U CN213291485 U CN 213291485U CN 202021724372 U CN202021724372 U CN 202021724372U CN 213291485 U CN213291485 U CN 213291485U
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- Prior art keywords
- oil
- driving system
- servo motor
- communicated
- servo
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- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 66
- 239000010720 hydraulic oil Substances 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000002146 bilateral effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- 239000002184 metal Substances 0.000 description 8
- 230000004044 response Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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- Bending Of Plates, Rods, And Pipes (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The utility model relates to a servo bender actuating system, servo bender includes the slider, slider bilateral symmetry is provided with the first actuating system and the second actuating system that the structure is the same, first actuating system includes servo motor actuating system, hydraulic drive system; the servo motor driving system comprises a first servo motor and a transmission device arranged on the sliding block; the hydraulic driving system comprises an oil cylinder and an energy accumulator, wherein the oil cylinder comprises a cylinder barrel, a piston rod, an oil tank, a one-way oil pump and an oil filling valve. The oil inlet of the one-way oil pump is communicated with the oil tank, the outlet of the one-way oil pump is communicated with the rodless cavity, the oil inlet of the oil filling valve is communicated with the oil tank, and the oil outlet of the oil filling valve is communicated with the rodless cavity. The energy accumulator is communicated with the rod cavity, and the end part of the piston rod is fixedly connected with the sliding block. The hydraulic driving system adopts the one-way oil pump and the liquid filling valve to input hydraulic oil into the oil cylinder, and has the advantages of simple structure, low price, high stability and simple maintenance.
Description
Technical Field
The utility model relates to a hydraulic drive system, especially a actuating system for servo bender.
Background
The servo bending machine is a device for processing sheet metal parts, the working process of the servo bending machine comprises a fast descending-working advancing-returning cycle, wherein the fast descending and returning processes do not contact with the sheet metal parts and require a driving system to have high response speed, the working advancing process applies pressure to the sheet metal parts and has high requirement on the output tonnage of the driving system of the servo bending machine, and the two working states of the servo bending machine have different requirements on the driving system.
The existing servo bending machine driving systems are divided into two types, wherein one type is a pure electric servo driving bending machine, and the other type is a bidirectional hydraulic pump which is used for conveying hydraulic oil to an oil cylinder for driving. The pure electric servo driving system has fast response and good stability, but has small output tonnage force and is difficult to process large-scale workpieces. The bidirectional hydraulic pump conveys pressure oil to the oil cylinder for driving, the output tonnage force is large, but the response is slow. In addition, the driving system combining the bidirectional hydraulic pump and the oil cylinder has complex structure, poor stability and difficult maintenance. Both of these conventional drive systems are difficult to adapt to the requirements of servo bending machines under different working conditions.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to an at least technical problem who exists among the prior art, it is big to provide an output tonnage, and response speed is fast, and simple structure maintains easy servo bender actuating system.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a servo bending machine driving system comprises a sliding block, wherein a first driving system and a second driving system which are identical in structure are symmetrically arranged on two sides of the sliding block, and the first driving system comprises a servo motor driving system and a hydraulic driving system; the servo motor driving system comprises a first servo motor and a transmission device connected with the sliding block and the first servo motor; the hydraulic driving system comprises an oil cylinder, an energy accumulator and an oil filling valve, wherein the oil cylinder comprises a cylinder barrel, a piston rod, an oil tank, a one-way oil pump and the oil filling valve. The piston is movably connected with the cylinder barrel in a sealing mode, the cylinder barrel is divided into a rod cavity and a rodless cavity, an oil inlet of the one-way oil pump is communicated with the oil tank, an outlet of the one-way oil pump is communicated with the rodless cavity, an oil inlet of the oil filling valve is communicated with the oil tank, and an oil outlet of the oil filling valve is communicated with the rodless cavity. The energy accumulator is communicated with the rod cavity, and the end part of the piston rod is fixedly connected with the sliding block.
The beneficial effects of this technical scheme do: the bending machine is fast in down and return process, the response speed is high through control of the first servo motor, and the working efficiency of the servo bending machine is improved. The working process is controlled by a hydraulic driving system, and the output tonnage is large.
The hydraulic driving system adopts the one-way oil pump and the liquid filling valve to input hydraulic oil into the oil cylinder, and has the advantages of simple structure, low price, high stability and simple maintenance.
Further, the hydraulic drive system further comprises a second servo motor, and the second servo motor is electrically connected with the one-way oil pump.
The second servo motor can accurately control the input quantity of hydraulic oil input from the one-way oil pump to the oil cylinder, more accurately control the output tonnage of the hydraulic driving system, and improve the processing precision of sheet metal parts. The adaptability of the servo bending machine to different sheet metal parts can be improved.
Furthermore, transmission includes connecting plate and lead screw part, the lead screw part includes lead screw and screw, first servo motor output shaft and connecting plate fixed connection, lead screw one end and connecting plate fixed connection, the other end with screw fixed connection, screw and slider fixed connection.
The transmission device has the advantages of simple structure, high transmission efficiency, low noise and low cost.
Further, the energy accumulator is a high-purity nitrogen gas energy accumulator.
The high-purity nitrogen accumulator has strong energy storage capacity and good energy-saving effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the hydraulic servo system comprises a sliding block 1, a servo motor driving system 2, a hydraulic driving system 3, a first servo motor 2-1, a connecting plate 2-2, a lead screw 2-3, a screw 2-4, an oil cylinder 3-1, a piston 3-1-2, a piston rod 3-1-3, a rod cavity 3-1-4, a rodless cavity 3-1-5, an energy accumulator 3-2, an oil tank 3-3, a one-way oil pump 3-4, an oil filling valve 3-5 and a second servo motor 3-6.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Fig. 1 is a schematic structural diagram of a driving system of a servo bending machine according to the present invention, and it can be seen from the diagram that a first driving system and a second driving system with the same structure are symmetrically arranged at two ends of a slider 1. For the sake of simplicity, only the structure of the first drive system is detailed.
The first driving system comprises a servo motor driving system 2 and a hydraulic driving system 3; the servo motor driving system 2 comprises a first servo motor 2-1 and a transmission device for connecting the sliding block 1 and the first servo motor 2-1. The transmission device comprises a connecting plate 2-2 and a lead screw component, the lead screw component comprises a lead screw 2-3 and a screw nut 2-4, an output shaft of the first servo motor 2-1 is fixedly connected with the connecting plate 2-2, one end of the lead screw 2-3 is fixedly connected with one side, connected with the connecting plate 2-2, of the output shaft of the first servo motor 2-1, the other end of the lead screw is fixedly connected with the screw nut 2-4, and the screw nut 2-4 is fixedly connected with the sliding block 1.
The hydraulic driving system 3 comprises an oil cylinder 3-1, an energy accumulator 3-2 and an oil filling valve 3-5, wherein the oil cylinder 3-1 comprises a cylinder barrel, a piston 3-1-2, a piston rod 3-1-3, a one-way oil pump 3-4 and an oil tank 3-3. The piston 3-1-2 is connected with the cylinder barrel in a sealing and sliding fit manner to divide the cylinder barrel into a rod cavity 3-1-4 and a rodless cavity 3-1-5, an oil inlet of the one-way oil pump 3-4 is communicated with the oil tank 3-3, and an outlet is communicated with the rodless cavity 3-1-4. An oil inlet of the oil filling valve 3-5 is communicated with the oil tank 3-3, and an oil outlet is communicated with the rodless cavity 3-1-5. The end part of the piston rod 3-1-3 is fixedly connected with the sliding block 1. The energy accumulator 3-2 is communicated with the rod cavity 3-1-4, and the energy accumulator 3-2 is preferably a high-purity nitrogen gas energy accumulator.
Preferably, the hydraulic drive system 3 further comprises a second servo motor 3-6, and the second servo motor 3-6 is electrically connected with the one-way oil pump 3-4.
The working principle of the invention is as follows:
A. in the fast-forward process, the first servo motor 2-1 drives the connecting plate 2-2 to enable the screw rod 2-3 to push the screw nut 2-4 and further push the sliding block 1 to move downwards from the top dead center to a speed change point, the sliding block 1 drives the piston rod 3-1-3 to pull the piston 3-1-2 to move downwards in the downwards moving process, the pressure in the rodless cavity 3-1-5 is reduced, the oil filling valve 3-5 is opened, hydraulic oil in the oil tank 3-3 flows into the rodless cavity 3-1-5 quickly, and meanwhile, the piston 3-1-2 pushes the hydraulic oil in the rod cavity 3-1-4 into the energy accumulator 3-2.
B. During the working process, the first servo motor 2-1 is arranged to move synchronously with the hydraulic drive system 3. The one-way oil pump 3-4 inputs hydraulic oil into the rodless cavity 3-1-5, and the second servo motor 3-6 can control the oil inlet amount of the one-way oil pump 3-4, so that the output pressure of the hydraulic drive system 3 is controlled. The hydraulic oil input into the rodless cavity 3-1-5 pushes the piston 3-1-2 and the piston rod 3-1-3 to move downwards, and the piston rod 3-1-3 drives the sliding block 1 to move downwards to apply pressure to the sheet metal part. During this process, the piston 3-1-2 continues to push hydraulic oil in the rod chamber 3-1-4 into the accumulator 3-2.
In the process of working, although the hydraulic driving system 3 mainly provides driving force for the sliding block 1, the first servo motor 2-1 is fixedly connected with the sliding block 1 through a transmission device, if the sliding block stops rotating, the transmission device is damaged, and therefore the first servo motor 2-1 and the hydraulic driving system are set to move synchronously.
C. In the return process, the second servo motor 3-6 and the one-way oil pump 3-4 stop working. The first servo motor 2-1 rotates reversely to rapidly pull the sliding block 1 to move upwards from the bottom dead center to the top dead center. In the process, the piston rod 3-1-3 is pushed to move upwards by the sliding block 1 driven upwards by the first servo motor 2-1, potential energy stored in the energy accumulator 3-2 is released, hydraulic oil in the energy accumulator 3-2 flows back to the rod cavity 3-1-4, the piston 3-1-2 is driven to move upwards, and oil is controlled to flush the oil filling valve 3-5, so that the hydraulic oil flows into the oil tank 3-3. Completing a cycle process.
The above-mentioned top dead center, bottom dead center and shift point are defined as follows:
top dead center: when the sliding block moves upwards, the highest point which can be reached is determined by a limiting device at the upper part of the bending machine;
bottom dead center: when the slider of the bending machine moves, the lowest point which can be reached is determined by a limiting device at the lower part of the bending machine;
the speed change point is as follows: in the descending process of the sliding block, when the sliding block does not contact the sheet metal part to be processed, the movement speed can be high, but when a die on the sliding block starts to contact the sheet metal part to be processed, in order to ensure safety and processing precision, the descending speed must be reduced, the position for changing the descending speed of the sliding block is a speed change point, and the position of the speed change point is determined by a control system of a servo bending machine.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. A servo bending machine driving system comprises a sliding block (1), and is characterized in that a first driving system and a second driving system which are identical in structure are symmetrically arranged on two sides of the sliding block (1), and the first driving system comprises a servo motor driving system (2) and a hydraulic driving system (3); the servo motor driving system (2) comprises a first servo motor (2-1) and a transmission device for connecting the sliding block (1) and the first servo motor (2-1); the hydraulic driving system (3) comprises an oil cylinder (3-1), an energy accumulator (3-2) and an oil filling valve (3-5); the oil cylinder (3-1) comprises a cylinder barrel, a piston (3-1-2), a piston rod (3-1-3), an oil tank (3-3) and a one-way oil pump (3-4); the piston (3-1-2) is connected with the cylinder barrel in a sealing sliding fit manner, the cylinder barrel is divided into a rod cavity (3-1-4) and a rodless cavity (3-1-5), an oil inlet of the one-way oil pump (3-4) is communicated with the oil tank (3-3), and an oil outlet of the one-way oil pump is communicated with the rodless cavity (3-1-5); an oil inlet of the oil filling valve (3-5) is communicated with the oil tank (3-3), and an oil outlet of the oil filling valve is communicated with the rodless cavity (3-1-5); the energy accumulator (3-2) is communicated with the rod cavity (3-1-4), and the end part of the piston rod (3-1-3) is fixedly connected with the sliding block (1).
2. Servo bending machine driving system according to claim 1, characterized in that said hydraulic driving system (3) further comprises a second servo motor (3-6), said second servo motor (3-6) being electrically connected to said unidirectional oil pump (3-4).
3. The servo bending machine driving system according to claim 1, wherein the transmission device comprises a connecting plate (2-2) and a lead screw component, the lead screw component comprises a lead screw (2-3) and a nut (2-4), an output shaft of the first servo motor (2-1) is fixedly connected with the connecting plate (2-2), one end of the lead screw (2-3) is fixedly connected with one side of the connecting plate (2-2) connected with the output shaft of the first servo motor (2-1), the other end of the lead screw is fixedly connected with the nut (2-4), and the nut (2-4) is fixedly connected with the sliding block (1).
4. Servo bending machine drive system according to claim 1, characterized in that said accumulators (3-2) are high purity nitrogen accumulators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021724372.6U CN213291485U (en) | 2020-08-18 | 2020-08-18 | Servo bender actuating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021724372.6U CN213291485U (en) | 2020-08-18 | 2020-08-18 | Servo bender actuating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213291485U true CN213291485U (en) | 2021-05-28 |
Family
ID=76025138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021724372.6U Expired - Fee Related CN213291485U (en) | 2020-08-18 | 2020-08-18 | Servo bender actuating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213291485U (en) |
-
2020
- 2020-08-18 CN CN202021724372.6U patent/CN213291485U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |