CN213997651U - Electro-hydraulic control device for rotary worktable of metal rotary extrusion hydraulic press - Google Patents
Electro-hydraulic control device for rotary worktable of metal rotary extrusion hydraulic press Download PDFInfo
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- CN213997651U CN213997651U CN202021829185.4U CN202021829185U CN213997651U CN 213997651 U CN213997651 U CN 213997651U CN 202021829185 U CN202021829185 U CN 202021829185U CN 213997651 U CN213997651 U CN 213997651U
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Abstract
The utility model discloses an electro-hydraulic control device of swivel work head of metal rotary extrusion hydraulic press belongs to hydraulic press technical field, and its characterized in that includes at least: the first motor drives the proportional variable pump to act; the second motor drives the constant-power variable pump to act; the PLC is used for controlling the first motor and the second motor to act; wherein: the proportional variable pump is communicated with the oil tank through a first input pipeline; the proportional variable pump is connected with a hydraulic motor driving the rotary worktable to act through a first output pipeline; the first output pipeline is communicated with the oil tank through a first electromagnetic valve; the constant-power variable pump is communicated with the oil tank through a second input pipeline; the constant-power variable pump is connected with a hydraulic motor driving the rotary worktable to act through a second output pipeline; and the second output pipeline is communicated with the oil tank through a second electromagnetic valve. The stable start and stop of the workbench can be realized by the combination of the constant-power variable pump and the proportional variable pump.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic press, concretely relates to rotary worktable's of metal rotary extrusion hydraulic press electro-hydraulic control device.
Background
In recent years, with the progress of science and technology, aerospace is one of the fastest-developing industries. Magnesium alloy is used as a common material in aerospace, and the requirement on the forming process of the magnesium alloy is higher and higher. In order to solve the problem of forming a B-shaped groove in the inner wall of a magnesium alloy barrel part, a set of hydraulic machine suitable for rotary forging of the magnesium alloy barrel part needs to be developed, and the key of the set of hydraulic machine is a rotary workbench. The rotary worktable is driven by a hydraulic motor, the torque is amplified through a reduction gearbox and a combined gear in the middle, the highest rotating speed is 10rpm, the maximum torque is 30 tons of meters, and the vibration of the whole device is very large during starting and stopping.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem who exists among the well-known technology, provide a rotary worktable's of metal rotary extrusion hydraulic press electro-hydraulic control device, through the combination of constant power variable pump and proportion variable pump, can realize the steady of workstation and open and stop.
The utility model aims at providing a swivel work head's of metal rotary extrusion hydraulic press electricity liquid controlling means includes at least:
the first motor drives the proportional variable pump to act;
the second motor drives the constant-power variable pump to act;
the PLC is used for controlling the first motor and the second motor to act; wherein:
the proportional variable pump is communicated with the oil tank through a first input pipeline; the proportional variable pump is connected with a hydraulic motor driving the rotary worktable to act through a first output pipeline; the first output pipeline is communicated with the oil tank through a first electromagnetic valve;
the constant-power variable pump is communicated with the oil tank through a second input pipeline; the constant-power variable pump is connected with a hydraulic motor driving the rotary worktable to act through a second output pipeline; and the second output pipeline is communicated with the oil tank through a second electromagnetic valve.
Further, the I/O terminal of the PLC is electrically connected with the proportional variable pump, the constant power variable pump, the first electromagnetic valve and the second electromagnetic valve respectively.
The utility model has the advantages and positive effects that:
1. the proportional variable pump and the constant-power variable pump are combined for use, so that the stable start and stop of the rotary workbench are realized.
2. The combination of a proportional variable pump and a constant power variable pump reduces cost.
Drawings
FIG. 1 is a hydraulic schematic diagram of a preferred embodiment of the present invention;
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
as shown in fig. 1, the technical solution of the present invention is:
an electro-hydraulic control device for a rotary table of a metal rotary extrusion hydraulic machine, comprising:
the first motor drives the proportional variable pump to act;
the second motor drives the constant-power variable pump to act;
the PLC is used for controlling the first motor and the second motor to act; wherein:
the proportional variable pump is communicated with the oil tank through a first input pipeline; the proportional variable pump is connected with a hydraulic motor driving the rotary worktable to act through a first output pipeline; the first output pipeline is communicated with the oil tank through a first electromagnetic valve;
the constant-power variable pump is communicated with the oil tank through a second input pipeline; the constant-power variable pump is connected with a hydraulic motor driving the rotary worktable to act through a second output pipeline; and the second output pipeline is communicated with the oil tank through a second electromagnetic valve.
And the I/O terminal of the PLC is electrically connected with the proportional variable pump, the constant power variable pump, the first electromagnetic valve and the second electromagnetic valve respectively. Because the connection relationship between the PLC and the motor, the proportional variable pump, the constant power variable pump and the electromagnetic valve is the prior art, the detailed description of the specific circuit is omitted here.
In fig. 1: wherein what the second motor M03 drove is the proportional variable pump, and what the first motor M04 drove is the constant power variable pump, can realize the steady start-stop of workstation through the combination, and specific control scheme is as follows (explain with the top rotational speed 10 rpm):
the working principle is as follows:
1. starting a control scheme:
1) when the second electromagnetic valve YAP03 is powered on, the proportional variable pump driven by the second motor M03 is put into use, the flow rate of the pump is slowly increased from the minimum value to the maximum value, at the moment, the workbench is started, and the rotating speed is slowly increased from 0 to 5 rpm.
2) When the rotating speed of the workbench reaches 5rpm, the first electromagnetic valve YAP04 is electrified, and the flow of the proportional pump driven by the second motor M03 is instantaneously reduced to the minimum. At this time, the rotating speed of the workbench is still 5rpm, and only the power source is smoothly switched to the constant-power variable pump driven by the M04 motor.
3) After the constant-power variable pump driven by the first motor M04 is stably put into use, the flow of the proportional variable pump driven by the first motor M03 is slowly increased from the lowest to the highest, so that the rotating speed of the workbench is stably increased from 5rpm to the highest rotating speed of 10 rpm. By the end of this stage start-up procedure, the stage was run at 10 rpm.
2. The braking control scheme is as follows:
1) during braking, the second electromagnetic valve YAP03 and the first electromagnetic valve YAP04 are kept electrified, the flow of the proportional variable pump driven by the second motor M03 is slowly reduced to the minimum value, and the rotating speed of the workbench is smoothly reduced from 10rpm to 5 rpm.
2) When the rotation speed of the worktable reaches 5rpm, the first electromagnetic valve YAP04 is powered off, and the flow rate of the proportional pump driven by the second M03 is increased to the maximum instantaneously. At this time, the rotation speed of the working platform is still 5rpm, and only the power source is smoothly switched to the proportional variable pump driven by the second motor M03.
3) After the constant-power variable pump driven by the first motor M04 is withdrawn, the flow of the proportional variable pump driven by the second motor M03 is slowly reduced from the maximum to the minimum, so that the rotating speed of the workbench is smoothly reduced from 5rpm to the minimum, the second electromagnetic valve YAP03 is powered off, and the workbench stops running after the braking process of the workbench is finished.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (2)
1. An electro-hydraulic control device for a rotary table of a metal rotary extrusion hydraulic machine, characterized by comprising at least:
the first motor drives the proportional variable pump to act;
the second motor drives the constant-power variable pump to act;
the PLC is used for controlling the first motor and the second motor to act; wherein:
the proportional variable pump is communicated with the oil tank through a first input pipeline; the proportional variable pump is connected with a hydraulic motor driving the rotary worktable to act through a first output pipeline; the first output pipeline is communicated with the oil tank through a first electromagnetic valve;
the constant-power variable pump is communicated with the oil tank through a second input pipeline; the constant-power variable pump is connected with a hydraulic motor driving the rotary worktable to act through a second output pipeline; and the second output pipeline is communicated with the oil tank through a second electromagnetic valve.
2. The electrohydraulic control device for the rotating table of metal rotary extrusion hydraulic machine according to claim 1, wherein an I/O terminal of the PLC is electrically connected to a proportional variable pump, a constant power variable pump, a first solenoid valve and a second solenoid valve, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021829185.4U CN213997651U (en) | 2020-08-27 | 2020-08-27 | Electro-hydraulic control device for rotary worktable of metal rotary extrusion hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021829185.4U CN213997651U (en) | 2020-08-27 | 2020-08-27 | Electro-hydraulic control device for rotary worktable of metal rotary extrusion hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213997651U true CN213997651U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021829185.4U Active CN213997651U (en) | 2020-08-27 | 2020-08-27 | Electro-hydraulic control device for rotary worktable of metal rotary extrusion hydraulic press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213997651U (en) |
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2020
- 2020-08-27 CN CN202021829185.4U patent/CN213997651U/en active Active
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