CN219262814U - Forging press pressurization forging return hydraulic control system - Google Patents
Forging press pressurization forging return hydraulic control system Download PDFInfo
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- CN219262814U CN219262814U CN202320352709.2U CN202320352709U CN219262814U CN 219262814 U CN219262814 U CN 219262814U CN 202320352709 U CN202320352709 U CN 202320352709U CN 219262814 U CN219262814 U CN 219262814U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a forging press pressurizing forging return hydraulic control system, wherein a low-pressure liquid supply pump is arranged on an oil supply main pipeline shared by a main cylinder, a return cylinder and a main oil tank, an oil supply branch pipeline of the return cylinder is communicated with an oil port of a bidirectional variable pump, the other oil inlet of the bidirectional variable pump is connected with the oil supply branch pipeline of the main cylinder, an open type constant delivery pump and a main cylinder oil supply check valve are arranged on the main cylinder oil supply branch pipeline between the joint and the main oil tank, and a main cylinder liquid discharge valve is arranged on an oil discharge pipeline of the main cylinder; and a return cylinder energy accumulator is arranged on the return cylinder oil supply branch pipeline. According to the utility model, the flow of high-pressure oil between the main cylinder and the return cylinder is controlled through the bidirectional variable pump, and the combined volume control of the open hydraulic circuit and the closed hydraulic circuit prevents the throttle valve from being subjected to high-pressure oil unloading impact, so that the high-pressure oil does not need to be discharged to the oil tank through the throttle valve, the throttle heating is avoided, and the stable operation of the forging press is ensured.
Description
Technical Field
The utility model relates to the field of metal stamping forging equipment, in particular to a hydraulic control system for a pressurized forging return stroke of a forging press.
Background
As shown in figure 1, the hydraulic control system for pressurized forging of the existing hydraulic forging press is characterized in that oil supply main pipes of a main cylinder and a return cylinder are independent, and an open type constant delivery pump, an electromagnetic overflow valve, a one-way valve, a liquid inlet throttle valve and a liquid discharge throttle valve are respectively arranged on the oil supply main pipes. When the hydraulic press completes the pressurizing forging back-turning motion, high-pressure oil in the main cylinder is discharged back to the oil tank through the liquid discharge throttle valve of the main cylinder, when the movable sliding block of the hydraulic press returns upwards and turns back to the pressurizing motion, the high-pressure oil in the return cylinder is discharged back to the oil tank through the liquid discharge throttle valve of the return cylinder, the energy of the high-pressure oil in each forging beat main cylinder and the return cylinder is consumed through the liquid discharge throttle valve, the energy loss of the system is large, the energy waste is caused, and when the liquid discharge throttle valve is controlled improperly, larger impact vibration is caused to the system, and the stable operation of equipment is affected.
Disclosure of Invention
The utility model aims to provide a hydraulic control system for a pressurized forging return stroke of a forging press, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a forging press pressurization forging return hydraulic control system, including master cylinder, return cylinder, forging press's movable slide block, install low pressure feed pump on master cylinder and return cylinder and the common fuel feeding trunk line of main tank, the oil-out of low pressure feed pump is linked together with master cylinder fuel feeding branch pipeline and return cylinder fuel feeding branch pipeline respectively, return cylinder fuel feeding branch pipeline is linked together with an hydraulic fluid port of two-way variable pump, another oil inlet of two-way variable pump is connected with master cylinder fuel feeding branch pipeline, install open constant delivery pump and master cylinder fuel feeding check valve on the master cylinder fuel feeding branch pipeline between this junction and the main tank, install master cylinder drain valve on the drain line of master cylinder; and a return cylinder energy accumulator is arranged on the return cylinder oil supply branch pipeline.
Preferably, a return cylinder safety valve is installed on the return cylinder oil supply branch pipeline.
Preferably, a low-pressure overflow valve communicated with the main oil tank is arranged at an oil drain port of the low-pressure liquid supply pump.
Preferably, an electromagnetic overflow valve communicated with the main oil tank is arranged at an oil discharge port of the open type constant displacement pump.
Preferably, the return cylinder oil supply branch pipeline is provided with a return cylinder oil supply check valve.
Preferably, the rodless cavity of the master cylinder is in communication with a charge tank.
The working principle of the utility model is as follows:
the two working oil ports of the bidirectional variable pump are respectively connected with the main cylinder and the return cylinder, the low-pressure liquid supply pump provides low-pressure oil with sufficient flow, and the redundant oil returns to the main oil tank through the low-pressure overflow valve after the oil required by the open type quantitative pump and the bidirectional variable pump is met.
When the forging press performs forging pressurization in a descending way, the open type quantitative pump conveys oil to the main cylinder, and the bidirectional variable pump discharges the oil of the return cylinder to the main cylinder; when the movable sliding block moves downwards to contact with the forging, the pressure of the main cylinder gradually rises along with the deformation of the forging, the return cylinder oil is discharged by the bidirectional variable pump to become low pressure, and when the pressure of the return cylinder is lower than the pressure of the oil provided by the low pressure liquid supply pump, the oil provided by the low pressure liquid supply pump enters the oil suction port of the bidirectional variable pump to supplement oil through the oil supply one-way valve of the return cylinder; when the forging is pressurized in place, the swing angle of the bidirectional variable pump returns to the zero position, an electromagnetic overflow valve arranged at the oil outlet of the open type constant displacement pump is powered off, oil discharged by the open type constant displacement pump returns to the main oil tank through the electromagnetic overflow valve, and the movable sliding block stops moving; when the two-way variable pump continues to deflect reversely, high-pressure oil of the main cylinder is discharged to the return cylinder, the main cylinder pressure is reduced, the return cylinder pressure is increased, the movable sliding block moves upwards, the main cylinder area is far larger than the return cylinder area, the high-pressure oil discharged by the main cylinder is stored in the return cylinder energy accumulator, when the main cylinder pressure sensor detects that the main cylinder pressure is reduced, the main cylinder liquid discharge valve is opened, part of oil discharged by the main cylinder is discharged back to the main oil tank, after the movable sliding block moves upwards in place, the main cylinder liquid discharge valve is closed, the two-way variable pump returns to a zero position, the movable sliding block stops moving, at the moment, the oil in the main cylinder is low-pressure oil, and the oil in the return cylinder is high-pressure oil required for pushing the movable sliding block to move upwards; when the swing angle of the bidirectional variable pump is positively increased, high-pressure oil in the return cylinder enters the main cylinder, the pressure of the return cylinder is reduced, the electromagnetic overflow valve is closed, oil of the open type constant delivery pump enters the main cylinder, and the movable sliding block moves downwards to perform the next forging beat.
According to the utility model, the flow of high-pressure oil between the main cylinder and the return cylinder is controlled through the bidirectional variable pump, and the combined volume control of the open hydraulic circuit and the closed hydraulic circuit prevents the throttle valve from being subjected to high-pressure oil unloading impact, so that the high-pressure oil does not need to be discharged to the oil tank through the throttle valve, the throttle heating is avoided, and the stable operation of the forging press is ensured.
Through the use of the utility model, high-pressure oil and low-pressure oil in the main cylinder and the return cylinder are alternately switched, the oil flow is continuously adjustable, the energy is recycled, and the energy is saved and the environment is protected.
Drawings
FIG. 1 is a schematic diagram of the hydraulic control of the forging return stroke of a conventional forging press;
fig. 2 is a schematic diagram of hydraulic control of the press forging return stroke of the forging press according to the present utility model;
in the figure: 1. the hydraulic oil pump comprises a main oil tank, 2, a low-pressure liquid supply pump, 3, a return cylinder oil supply check valve, 4, a return cylinder energy accumulator, 5, a bidirectional variable pump, 6, a return cylinder safety valve, 7, a return cylinder, 8, a main cylinder, 9, a movable sliding block, 10, a liquid filling oil tank, 11, a main cylinder pressure sensor, 12, a main cylinder liquid discharge valve, 13, an electromagnetic overflow valve, 14, a main cylinder oil supply check valve, 15, a starting constant delivery pump, 16 and a low-pressure overflow valve.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
The forging press pressurizing forging return hydraulic control system shown in fig. 2 comprises a main cylinder 8, a return cylinder 7 and a movable sliding block 9 of the forging press, wherein a low-pressure liquid supply pump 2 is arranged on an oil supply main pipeline shared by the main cylinder 8 and the return cylinder 7 and a main oil tank 1, an oil outlet of the low-pressure liquid supply pump 2 is respectively communicated with a main cylinder oil supply branch pipeline and a return cylinder oil supply branch pipeline, the return cylinder oil supply branch pipeline is communicated with one oil port of a bidirectional variable pump 5, the other oil inlet of the bidirectional variable pump 5 is connected with the main cylinder oil supply branch pipeline, an open type constant delivery pump 15 and a main cylinder oil supply one-way valve 14 are arranged on the main cylinder oil supply branch pipeline between the joint and the main oil tank 1, and a main cylinder drain valve 12 is arranged on a drain pipeline of the main cylinder 8; the return cylinder oil supply branch pipe is provided with a return cylinder energy accumulator 4.
The return cylinder oil supply branch pipeline is provided with a return cylinder safety valve 6.
The oil drain port of the low pressure liquid feed pump 2 is provided with a low pressure overflow valve 16 which is communicated with the main oil tank 1.
An electromagnetic overflow valve 13 communicated with the main oil tank 1 is arranged at an oil discharge port of the open type constant displacement pump 15.
The return cylinder oil supply branch pipeline is provided with a return cylinder oil supply one-way valve 3.
The rodless chamber of the master cylinder 8 communicates with a charge tank 10.
The working process of the utility model is as follows:
the two working oil ports of the bidirectional variable pump 5 are respectively connected with the main cylinder 8 and the return cylinder 7, the low-pressure liquid supply pump 2 provides low-pressure oil with enough flow, and redundant oil returns to the main oil tank 1 through the low-pressure overflow valve 16 after the oil required by the open type quantitative pump 15 and the bidirectional variable pump 5 is met.
When the forging press performs forging pressurization in a descending manner, the open type constant displacement pump 15 conveys oil to the main cylinder 8, and the bidirectional variable displacement pump 5 discharges the oil of the return cylinder 7 to the main cylinder 8; when the movable sliding block 9 moves downwards to contact with the forge piece, the pressure of the main cylinder 8 gradually rises along with the deformation of the forge piece, the oil in the return cylinder 7 is discharged by the bidirectional variable pump 5 to become low pressure, and when the pressure of the return cylinder 7 is lower than the pressure of the oil provided by the low pressure liquid supply pump 2, the oil provided by the low pressure liquid supply pump 2 enters the oil suction port of the bidirectional variable pump 5 through the return cylinder oil supply one-way valve 3 to supplement the oil; when the forge piece is pressurized in place, the swing angle of the bidirectional variable pump 5 returns to the zero position, the electromagnetic overflow valve 13 arranged at the oil outlet of the open type constant displacement pump 15 is powered off, the oil discharged by the open type constant displacement pump 15 returns to the main oil tank 1 through the electromagnetic overflow valve 13, and the movable sliding block 9 stops moving; when the bidirectional variable pump 15 continuously deflects reversely, high-pressure oil of the main cylinder 8 is discharged to the return cylinder 7, the pressure of the main cylinder 8 is reduced, the pressure of the return cylinder 7 is increased, the movable sliding block 9 moves upwards, the area of the main cylinder 8 is far larger than that of the return cylinder 7, high-pressure oil discharged by the main cylinder 8 is stored in the return cylinder energy accumulator 4, when the main cylinder pressure sensor 11 detects that the pressure of the main cylinder 8 is reduced, the main cylinder drain valve 12 is opened, part of oil discharged by the main cylinder 8 is discharged back to the main oil tank 1 through the main cylinder drain valve 12, after the movable sliding block 9 moves upwards in place, the main cylinder drain valve 12 is closed, the bidirectional variable pump 5 returns to a zero position, the movable sliding block 9 stops moving, at the moment, the oil in the main cylinder 8 is low-pressure oil, the oil in the return cylinder 7 is high-pressure oil required for pushing the movable sliding block 9 to move upwards, when the swing angle of the bidirectional variable pump 5 is positively increased, the high-pressure oil in the return cylinder 7 enters the main cylinder 8, the return cylinder 7 is reduced, the electromagnetic overflow valve 13 is closed, the oil in the open type quantitative pump 15 enters the main cylinder 8, the movable sliding block 9 moves downwards, and the next beat is forged.
The high-pressure oil of the main cylinder 8 and the return cylinder 7 is alternately used by the bidirectional variable pump 5, so that the high-pressure unloading impact and the throttling heating of the high-pressure oil by using a valve control system are avoided.
According to the utility model, the flow of high-pressure oil between the main cylinder and the return cylinder is controlled through the bidirectional variable pump, and the combined volume control of the open hydraulic circuit and the closed hydraulic circuit prevents the throttle valve from being subjected to high-pressure oil unloading impact, so that the high-pressure oil does not need to be discharged to the oil tank through the throttle valve, the throttle heating is avoided, and the stable operation of the forging press is ensured.
The above are only preferred examples of the present utility model. It should be noted that other equivalent modifications and improvements will occur to those skilled in the art, and are intended to be within the scope of the present utility model.
Claims (6)
1. The utility model provides a forging press pressurization forging return stroke hydraulic control system, includes master cylinder (8), return cylinder (7), forging press's movable slide block (9), its characterized in that: the main cylinder (8) and the return cylinder (7) are provided with a low-pressure liquid supply pump (2) on a main oil supply pipeline shared by the main oil tank (1), oil outlets of the low-pressure liquid supply pump (2) are respectively communicated with a main cylinder oil supply branch pipeline and a return cylinder oil supply branch pipeline, the return cylinder oil supply branch pipeline is communicated with one oil port of the bidirectional variable pump (5), the other oil port of the bidirectional variable pump (5) is connected with the main cylinder oil supply branch pipeline, an open type constant delivery pump (15) and a main cylinder oil supply one-way valve (14) are arranged on the main cylinder oil supply branch pipeline between the joint and the main oil tank (1), and a main cylinder drain valve (12) is arranged on an oil drain pipeline of the main cylinder (8); the return cylinder oil supply branch pipeline is provided with a return cylinder energy accumulator (4).
2. The forging press pressurized forging return hydraulic control system of claim 1, wherein: and a return cylinder safety valve (6) is arranged on the return cylinder oil supply branch pipeline.
3. The forging press pressurized forging return hydraulic control system according to claim 1 or 2, wherein: the oil drain port of the low-pressure liquid supply pump (2) is provided with a low-pressure overflow valve (16) communicated with the main oil tank (1).
4. A forging press pressurized forging return hydraulic control system according to claim 3, wherein: an electromagnetic overflow valve (13) communicated with the main oil tank (1) is arranged at an oil discharge port of the open type constant displacement pump (15).
5. The forging press pressurized forging return hydraulic control system of claim 4, wherein: and the return cylinder oil supply branch pipeline is provided with a return cylinder oil supply one-way valve (3).
6. The forging press pressurized forging return hydraulic control system of claim 1, wherein: the rodless cavity of the master cylinder (8) is communicated with a liquid filling oil tank (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320352709.2U CN219262814U (en) | 2023-03-01 | 2023-03-01 | Forging press pressurization forging return hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320352709.2U CN219262814U (en) | 2023-03-01 | 2023-03-01 | Forging press pressurization forging return hydraulic control system |
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| Publication Number | Publication Date |
|---|---|
| CN219262814U true CN219262814U (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320352709.2U Active CN219262814U (en) | 2023-03-01 | 2023-03-01 | Forging press pressurization forging return hydraulic control system |
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| Country | Link |
|---|---|
| CN (1) | CN219262814U (en) |
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2023
- 2023-03-01 CN CN202320352709.2U patent/CN219262814U/en active Active
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