CN111255754A - Punching machine hydraulic system - Google Patents
Punching machine hydraulic system Download PDFInfo
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- CN111255754A CN111255754A CN202010233689.8A CN202010233689A CN111255754A CN 111255754 A CN111255754 A CN 111255754A CN 202010233689 A CN202010233689 A CN 202010233689A CN 111255754 A CN111255754 A CN 111255754A
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- hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Presses (AREA)
Abstract
The invention relates to a hydraulic system of a punching machine, comprising: the method comprises the following steps: the hydraulic control system comprises a main hydraulic cylinder, an ejection plunger cylinder, a plurality of blank pressing plunger cylinders, a main oil tank, a high-position oil tank, a two-position two-way electromagnetic reversing valve, a three-position four-way electro-hydraulic reversing valve, an electromagnetic reversing valve, a first electro-hydraulic reversing valve, a second electro-hydraulic reversing valve and an electromagnetic overflow valve. All the components are connected by hydraulic rubber pipes, and pipe joints and buckling joints of different types are adopted according to different types of components. The mold is arranged on the ejection plunger cylinder, and the ejection plunger cylinder ejects the workpiece after punch forming. The blank pressing plunger cylinder is used for pressing a workpiece in the stamping process. The blank pressing plunger cylinder, the ejection plunger cylinder and the main hydraulic cylinder are rigidly connected through a mechanical structure, the ejection of the piston rod is close to high-pressure oil, and the retraction of the piston rod is close to the driving of the main hydraulic cylinder.
Description
Technical Field
The invention belongs to the technical field of punching machines, and relates to a hydraulic system of a punching machine.
Background
The hydraulic system of the punching machine is a hydraulic system loop formed by a plurality of hydraulic components together so as to realize the extension and retraction of the oil cylinder. The existing punching machine system has the problems of low oil absorption efficiency of a hydraulic pump, high system failure rate, fewer emergency protection measures such as sudden power failure and the like.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a hydraulic system of a punching machine, which can improve the safety and reliability of products, reduce the product cost, reduce the resource waste and improve the working efficiency.
The invention provides a hydraulic system of a punching machine, comprising: the device comprises a main hydraulic cylinder, an ejection plunger cylinder, a plurality of blank pressing plunger cylinders, a main oil tank, a high-position oil tank, a two-position two-way electromagnetic reversing valve, a three-position four-way electro-hydraulic reversing valve, an electromagnetic reversing valve, a first electro-hydraulic reversing valve, a second electro-hydraulic reversing valve and an electromagnetic overflow valve; the main oil tank is connected with a first one-way valve through a variable displacement pump, the first one-way valve is respectively connected with an oil inlet of a three-position four-way electro-hydraulic reversing valve, an oil inlet of the first electro-hydraulic reversing valve and an oil inlet of a second electro-hydraulic reversing valve, a first working port of the three-position four-way electro-hydraulic reversing valve is connected with a rodless cavity of a main hydraulic cylinder through the second one-way valve, a rod cavity of the main hydraulic cylinder is connected with a second working port of the three-position four-way electro-hydraulic reversing valve, an oil return port of the three-position four-way electro-hydraulic reversing valve is connected with a two-position two-way electromagnetic reversing valve, the two-position two-way electromagnetic reversing valve is respectively connected with a cooler and an; an oil outlet of the first electro-hydraulic reversing valve is connected with an electromagnetic reversing valve, and the electromagnetic reversing valve is connected with an ejection plunger cylinder; the oil outlet of the second electro-hydraulic reversing valve is connected with the corresponding blank pressing plunger cylinder through a plurality of hydraulic control one-way valves respectively, the high-level oil tank is also connected with the corresponding blank pressing plunger cylinder through the hydraulic control one-way valves, and the oil return port of the second electro-hydraulic reversing valve is connected with the main oil tank; a first working port of the electromagnetic overflow valve is connected with an oil outlet of the variable pump, and a second working port of the electromagnetic overflow valve is connected with the main oil tank; and an energy accumulator is arranged on a pipeline connected with the first one-way valve and the three-position four-way electro-hydraulic reversing valve.
In the hydraulic system of the punching machine, the system comprises four blank pressing plunger cylinders, each blank pressing plunger cylinder is correspondingly connected with an oil inlet of a direct-acting overflow valve, and an oil outlet of the direct-acting overflow valve is connected with a main oil tank.
In the hydraulic system of the punching machine, the hydraulic system of the punching machine is also provided with an air filter and a liquid level and liquid temperature display which are respectively connected with a main oil tank.
In the hydraulic system of the punching machine, a pressure gauge is arranged on a pipeline connected with the first one-way valve and the three-position four-way electro-hydraulic reversing valve.
In the hydraulic system of the punching machine, a throttle valve is arranged between an oil return port of the three-position four-way electro-hydraulic reversing valve and an oil discharge port of the first electro-hydraulic reversing valve.
In the hydraulic system of the punching machine, a pilot overflow valve is arranged on a pipeline connecting the first electro-hydraulic reversing valve and the ejection plunger cylinder, an oil inlet of the pilot overflow valve is connected with the ejection plunger cylinder, and an oil outlet of the pilot overflow valve is connected with an oil outlet of the first electro-hydraulic reversing valve.
The hydraulic system of the punching machine can improve the safety and reliability of products, reduce the cost of the products, reduce the waste of resources and improve the working efficiency.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system of a press machine of the present invention;
in the figure: 1-a filter; 2-a variable displacement pump; 3-an electromagnetic overflow valve; 4. a first check valve; 5-an accumulator; 6-pressure gauge switch; 7-a pressure gauge; 8-a throttle valve; 9-two-position two-barrel electromagnetic directional valve; 10-three-position four-way electro-hydraulic reversing valve; 11-a second one-way valve; 12-a pressure relay; 13. a second electro-hydraulic directional valve; 14-18-hydraulic control one-way valve; 19-high level oil tank; 20-23 blank pressing plunger cylinders; 24-27 direct-acting overflow valves; 28-master cylinder; 29-ejection plunger cylinder; 30-a pilot operated relief valve; 31-an electromagnetic directional valve; 32-a first electro-hydraulic directional valve; 33-a cooler; 34-an air filter; 35-liquid level liquid temperature display.
Detailed Description
As shown in fig. 1, a hydraulic system of a press machine of the present invention includes: the hydraulic control device comprises a main hydraulic cylinder 28, an ejection plunger cylinder 29, a plurality of blank pressing plunger cylinders 20-23, a main oil tank 36, a high-level oil tank 19, a two-position two-way electromagnetic directional valve 9, a three-position four-way electro-hydraulic directional valve 10, an electromagnetic directional valve 31, a first electro-hydraulic directional valve 32, a second electro-hydraulic directional valve 13 and an electromagnetic overflow valve 3. The main oil tank passes through variable pump 2 and connects first check valve 4, first check valve 4 connects the oil inlet of three-position four-way electro-hydraulic directional valve 10, the oil inlet of first electro-hydraulic directional valve 32 and the oil inlet P of second electro-hydraulic directional valve 13 respectively, the no pole chamber of main hydraulic cylinder 28 is connected through second check valve 11 to first working port A of three-position four-way electro-hydraulic directional valve 10, and the second working port B of three-position four-way electro-hydraulic directional valve 10 is connected to the pole chamber of main hydraulic cylinder 28, and two lead to solenoid directional valve 9 are connected to the oil return port T of three-position four-way electro-hydraulic directional valve, two lead to solenoid directional valve 9 and connect the oil drain port of cooler 33 and first electro-hydraulic directional valve 32 respectively, cooler 33 passes through filter 1 and connects the main oil tank. An oil outlet of the first electro-hydraulic directional valve 32 is connected with an electromagnetic directional valve 31, and the electromagnetic directional valve 31 is connected with the ejection plunger cylinder 29. The oil outlets of the second electro-hydraulic reversing valves 13 are respectively connected with corresponding blank pressing plunger cylinders through a plurality of hydraulic control one-way valves 14-18, the high-level oil tank 19 is also connected with the corresponding blank pressing plunger cylinders through the hydraulic control one-way valves, and oil return ports of the second electro-hydraulic reversing valves 13 are connected with a main oil tank. And a first working port of the electromagnetic overflow valve 3 is connected with an oil outlet of the variable pump 2, and a second working port of the electromagnetic overflow valve 3 is connected with a main oil tank 36. And an energy accumulator 5 is arranged on a pipeline connected with the first one-way valve 4 and the three-position four-way electro-hydraulic reversing valve 10.
During specific implementation, the system comprises four blank pressing plunger cylinders 20-23 and four direct-acting overflow valves 24-27, wherein each blank pressing plunger cylinder is correspondingly connected with an oil inlet of one direct-acting overflow valve, and an oil discharge port of the direct-acting overflow valve is connected with a main oil tank.
In specific implementation, the hydraulic system of the punching machine is also provided with an air filter 34 and a liquid level and liquid temperature display 35 which are respectively connected with a main oil tank 36.
During specific implementation, a pressure gauge 7 is arranged on a pipeline connected with the first one-way valve 4 and the three-position four-way electro-hydraulic reversing valve 10, and the pressure gauge 7 is connected with the pipeline through a pressure gauge switch 6.
In specific implementation, a throttle valve 8 is arranged between an oil return port of the three-position four-way electro-hydraulic reversing valve 10 and an oil discharge port of the first electro-hydraulic reversing valve 32.
In specific implementation, a pilot-operated overflow valve 30 is arranged on a pipeline connecting the first electro-hydraulic reversing valve 3 and the ejection plunger cylinder 29, an oil inlet of the pilot-operated overflow valve 30 is connected with the ejection plunger cylinder 29, and an oil outlet of the pilot-operated overflow valve 30 is connected with an oil outlet of the first electro-hydraulic reversing valve 3.
When the device is specifically implemented, all the components are connected by adopting hydraulic rubber pipes, and pipe joints and buckling joints of different types are adopted according to the components of different types. A pressure relay 12 is arranged on a pipeline connecting the second check valve 11 and the master cylinder 28, and an electric signal is generated after the pressure reaches a set value.
The working principle is as follows: the punch is used for punching and forming sheet metal and thin plates, such as front covers of automobiles and the like. The master cylinder 28 is used to press the workpiece and thereby press-form it. The mold is arranged on the ejection plunger cylinder 29, and the ejection plunger cylinder 29 ejects the workpiece after punch forming. The blank pressing plunger cylinder is used for pressing a workpiece in the stamping process. The blank pressing plunger cylinder, the ejection plunger cylinder 29 and the main hydraulic cylinder 28 are rigidly connected through a mechanical structure, the ejection of the piston rod is driven by high-pressure oil, and the retraction of the piston rod is driven by the main hydraulic cylinder.
1. Master cylinder 28 is fast down:
an oil inlet path: the variable displacement pump 2 → the first check valve 4 → the three-position four-way electro-hydraulic directional valve 10 → the second check valve 11 → the master cylinder 28 rodless chamber.
An oil return path: the master cylinder 28 has a rod chamber → the three-position four-way electro-hydraulic directional valve 10 → the two-position two-bucket electromagnetic directional valve 9 → the cooler 33 → the filter 1 → the main oil tank 36.
2. Fast return of master cylinder 28:
an oil inlet path: the variable displacement pump 2 → the first check valve 4 → the three-position four-way electro-hydraulic directional valve 10 → the master cylinder 28 has a rod chamber.
An oil return path: master cylinder 28 rodless chamber → pilot operated check valve 16 → high-level tank 11
3. The working process of the ejection plunger cylinder comprises the following steps:
ejecting an oil inlet path extending out of the plunger cylinder: the variable displacement pump 2 → the first check valve 4 → the first electro-hydraulic directional valve 32 to the right → the electromagnetic directional valve 31 → the advancing plunger cylinder 29.
Retracting the ejection plunger cylinder: after the ejecting plunger cylinder ejects a workpiece, the ejecting plunger cylinder touches a travel switch, the travel switch sends an electric signal to ensure that a coil 1YA of the electromagnetic overflow valve 3 and a coil 2YA of the first electro-hydraulic reversing valve 32 are all de-energized, the variable displacement pump 2 is unloaded, the electromagnetic reversing valve 31 works at the right position, the first electro-hydraulic reversing valve 32 works at the left position, the ejecting plunger cylinder 29 descends under the dead weight, and oil flows back to the main oil tank 36 through the valve electromagnetic reversing valve 31, the first electro-hydraulic reversing valve 32, the cooler 33 and the filter 1 in sequence.
4. 20-23 working process of blank pressing plunger cylinder
And (3) stretching out of the blank pressing plunger cylinder: the variable displacement pump 2 → the first check valve 4 → the second electro-hydraulic directional valve 13 → the hydraulic control check valves 14, 15, 17, 18 → the blank pressing plunger cylinders 20-23.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.
Claims (6)
1. A hydraulic system for a press machine, comprising: the device comprises a main hydraulic cylinder, an ejection plunger cylinder, a plurality of blank pressing plunger cylinders, a main oil tank, a high-position oil tank, a two-position two-way electromagnetic reversing valve, a three-position four-way electro-hydraulic reversing valve, an electromagnetic reversing valve, a first electro-hydraulic reversing valve, a second electro-hydraulic reversing valve and an electromagnetic overflow valve; the main oil tank is connected with a first one-way valve through a variable displacement pump, the first one-way valve is respectively connected with an oil inlet of a three-position four-way electro-hydraulic reversing valve, an oil inlet of the first electro-hydraulic reversing valve and an oil inlet of a second electro-hydraulic reversing valve, a first working port of the three-position four-way electro-hydraulic reversing valve is connected with a rodless cavity of a main hydraulic cylinder through the second one-way valve, a rod cavity of the main hydraulic cylinder is connected with a second working port of the three-position four-way electro-hydraulic reversing valve, an oil return port of the three-position four-way electro-hydraulic reversing valve is connected with a two-position two-way electromagnetic reversing valve, the two-position two-way electromagnetic reversing valve is respectively connected with a cooler and an; an oil outlet of the first electro-hydraulic reversing valve is connected with an electromagnetic reversing valve, and the electromagnetic reversing valve is connected with an ejection plunger cylinder; the oil outlet of the second electro-hydraulic reversing valve is connected with the corresponding blank pressing plunger cylinder through a plurality of hydraulic control one-way valves respectively, the high-level oil tank is also connected with the corresponding blank pressing plunger cylinder through the hydraulic control one-way valves, and the oil return port of the second electro-hydraulic reversing valve is connected with the main oil tank; a first working port of the electromagnetic overflow valve is connected with an oil outlet of the variable pump, and a second working port of the electromagnetic overflow valve is connected with the main oil tank; and an energy accumulator is arranged on a pipeline connected with the first one-way valve and the three-position four-way electro-hydraulic reversing valve.
2. The hydraulic system of a punching machine according to claim 1, wherein the system comprises four blank holder plunger cylinders, each blank holder plunger cylinder is correspondingly connected with an oil inlet of a direct-acting overflow valve, and an oil outlet of the direct-acting overflow valve is connected with a main oil tank.
3. The hydraulic system of a press machine according to claim 1, wherein the hydraulic system of a press machine is further provided with an air cleaner and a liquid level and liquid temperature display, which are connected to a main oil tank, respectively.
4. The hydraulic system of a punching machine according to claim 1, wherein a pressure gauge is provided on a line connecting the first check valve and the three-position four-way electro-hydraulic directional valve.
5. The hydraulic system of a press machine according to claim 1, wherein a throttle valve is provided between the oil return of the three-position, four-way electro-hydraulic directional valve and the oil drain of the first electro-hydraulic directional valve.
6. The hydraulic system of a punching machine according to claim 1, wherein a pilot overflow valve is arranged on a pipeline connecting the first electro-hydraulic directional control valve and the ejection plunger cylinder, an oil inlet of the pilot overflow valve is connected with the ejection plunger cylinder, and an oil outlet of the pilot overflow valve is connected with an oil outlet of the first electro-hydraulic directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010233689.8A CN111255754A (en) | 2020-03-30 | 2020-03-30 | Punching machine hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010233689.8A CN111255754A (en) | 2020-03-30 | 2020-03-30 | Punching machine hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111255754A true CN111255754A (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010233689.8A Pending CN111255754A (en) | 2020-03-30 | 2020-03-30 | Punching machine hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111255754A (en) |
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2020
- 2020-03-30 CN CN202010233689.8A patent/CN111255754A/en active Pending
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