CN214617260U - Die closing control loop of pressure forming machine - Google Patents
Die closing control loop of pressure forming machine Download PDFInfo
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- CN214617260U CN214617260U CN202022923853.6U CN202022923853U CN214617260U CN 214617260 U CN214617260 U CN 214617260U CN 202022923853 U CN202022923853 U CN 202022923853U CN 214617260 U CN214617260 U CN 214617260U
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Abstract
The utility model discloses a die assembly control circuit of a pressure forming machine, wherein two ends of a first oil inlet pipeline are respectively connected with a hydraulic oil tank and a rodless cavity of a die assembly hydraulic cylinder, one end of the first oil inlet pipeline is connected with the hydraulic oil tank, and the other end of the first oil inlet pipeline is connected with one end of the second oil inlet pipeline, which is close to the hydraulic oil tank; a first electromagnetic reversing valve is arranged on the first oil inlet pipeline, and a first oil return pipeline is connected between the oil return side of the first electromagnetic reversing valve and the hydraulic oil tank; the oil inlet pipeline II is provided with a second electromagnetic reversing valve and an integrated block, the integrated block is installed on the pressure forming machine, a third electromagnetic reversing valve is integrated on the integrated block, a rod cavity of the die assembly hydraulic cylinder is connected with the second oil return pipeline, and the second oil return pipeline is connected with the third electromagnetic reversing valve and the second electromagnetic reversing valve in sequence and then is connected to the hydraulic oil tank. The utility model adopts the differential loop to drive the die-closing hydraulic cylinder to close the die, the die-closing speed of the movable die is high, the production efficiency is high, the motor power is small, the energy consumption is low, and the energy is saved and the environment is protected; simple structure, simple to operate switches the convenience.
Description
Technical Field
The utility model relates to a pressure forming machine technical field, concretely relates to novel pressure forming machine compound die control circuit.
Background
The existing compression molding mold closing mode is generally as shown in fig. 1, and mainly comprises: 1. the hydraulic oil tank comprises a hydraulic oil tank 2, a servo driving motor 3, a low-pressure large-flow hydraulic pump, a high-pressure small-flow hydraulic pump 4, an electromagnetic directional valve 5, a pressure release valve 6, a pressure release valve 7, a second electromagnetic directional valve 8 and a die assembly hydraulic cylinder. The method is characterized in that: hydraulic oil in the hydraulic station is directly injected into a rodless cavity of a die closing hydraulic cylinder 8 under the action of a servo driving motor 2 and double pumps 3 and 4 to drive the oil cylinder to close the die. The disadvantages of this mold clamping method are mainly:
1. the system adopts a mode that hydraulic oil is directly injected into a rodless cavity of the oil cylinder to drive the oil cylinder to mold, and in order to ensure the mold-closing pressure, the mold-closing hydraulic cylinder 8 generally has a larger cylinder diameter, so that the mold-closing speed is low, the mold-closing time is long, and the production efficiency is low;
2. in order to ensure the production efficiency, the forward pushing and retracting speed of the die assembly hydraulic cylinder 8 must be ensured, the models of the dual pumps 3 and 4 must be selected to be larger, and the servo driving motor 2 must have larger power, so that the energy consumption is high, the noise is high, and the energy conservation is not facilitated;
due to the reasons, the mold closing mode is low in speed, high in energy consumption, high in noise, low in production efficiency and not beneficial to energy conservation and environmental protection.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
An object of the utility model is to provide a novel pressure forming machine compound die control circuit to current compound die mode speed that proposes in solving above-mentioned background is slow, the energy consumption is big, the noise is big, and production efficiency is low, is unfavorable for energy-concerving and environment-protective problem.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: a die assembly control loop of a pressure forming machine comprises a hydraulic oil tank, an oil inlet pipeline I, an oil inlet pipeline II, an oil return pipeline I, an oil return pipeline II, an integrated block and a die assembly hydraulic cylinder, wherein two ends of the oil inlet pipeline II are respectively connected with a rodless cavity of the hydraulic oil tank and a rodless cavity of the die assembly hydraulic cylinder, one end of the oil inlet pipeline I is connected with the hydraulic oil tank, and the other end of the oil inlet pipeline I is connected to one end, close to the hydraulic oil tank, of the oil inlet pipeline II; a first electromagnetic reversing valve is arranged on the first oil inlet pipeline, and a first oil return pipeline is connected between the oil return side of the first electromagnetic reversing valve and the hydraulic oil tank; the oil inlet pipeline II is provided with a second electromagnetic reversing valve and an integrated block, the integrated block is installed on the pressure forming machine, a third electromagnetic reversing valve is integrated on the integrated block, a rod cavity of the die assembly hydraulic cylinder is connected with the second oil return pipeline, and the second oil return pipeline is connected with the third electromagnetic reversing valve and the second electromagnetic reversing valve in sequence and then is connected to the hydraulic oil tank.
Furthermore, a pressure release valve is connected in parallel between one end of the oil inlet pipeline one, which is positioned on an oil return side of the electromagnetic directional valve, and the oil return pipeline one.
Furthermore, one end of the oil inlet pipeline I and one end of the oil inlet pipeline II, which are connected with the hydraulic oil tank, are respectively provided with a low-pressure large-flow hydraulic pump and a high-pressure small-flow hydraulic pump, the low-pressure large-flow hydraulic pump and the high-pressure small-flow hydraulic pump are connected through a coupler, and the low-pressure large-flow hydraulic pump is connected with the servo driving motor through the coupler.
Furthermore, a one-way valve is further integrated on the integrated block, the oil outlet end of the one-way valve is connected with a second oil inlet pipeline, and the oil inlet end of the one-way valve is connected with a third electromagnetic directional valve.
Furthermore, the first electromagnetic directional valve, the third electromagnetic directional valve, the pressure release valve, the second electromagnetic directional valve and the one-way valve are electrically connected with a main controller with a control screen of the pressure forming machine.
Furthermore, the first electromagnetic directional valve and the third electromagnetic directional valve both adopt two-position four-way electromagnetic directional valves.
Furthermore, the second electromagnetic directional valve adopts a three-position four-way electromagnetic directional valve.
(III) advantageous effects
Compared with the prior art, after the technical scheme is adopted, the utility model discloses beneficial effect does:
1. the utility model discloses a differential circuit drive compound die pneumatic cylinder carries out the compound die, and movable mould compound die is fast, and production efficiency is high. Under the same speed requirement, compared with the traditional loop, the pump has the advantages of small specification, small motor power, low energy consumption, energy conservation and environmental protection;
2. the utility model can realize the requirement only by adding one integrated block, the integrated block is directly arranged on the pressure forming machine, the structure is simple, the installation is convenient, the piping is clear, the maintenance is convenient, the space is saved, and the operation and the inspection are convenient;
3. the utility model discloses it is convenient to switch, and whether accessible control panel free choice utilizes differential circuit, optional differential circuit in process of production, and production efficiency is high. In certain cases, such as: debugging, die filling, maintenance and the like, can be switched back to the traditional loop through the control screen selection, and has simple and convenient operation and safe and reliable loop.
Drawings
FIG. 1 is a schematic diagram of a prior art oil circuit configuration;
fig. 2 is a schematic diagram of an oil path structure according to an embodiment of the present invention;
description of reference numerals:
1. a hydraulic oil tank; 2. a servo drive motor; 3. a low-pressure large-flow hydraulic pump; 4. a high pressure low flow hydraulic pump; 5. a first electromagnetic directional valve; 6. a pressure relief valve; 7. a second electromagnetic directional valve; 8. a die closing hydraulic cylinder; 9. a one-way valve; 10. a third electromagnetic directional valve; 11. integrating the blocks; 12. an oil inlet pipeline I; 13. an oil inlet pipeline II; 14. a first oil return pipeline; 15. and a second oil return pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, the present invention provides an embodiment: a novel die assembly control loop of a pressure forming machine comprises a hydraulic oil tank 1, a servo driving motor 2, a low-pressure large-flow hydraulic pump 3, a high-pressure small-flow hydraulic pump 4, a first electromagnetic directional valve 5, a pressure release valve 6, a second electromagnetic directional valve 7, a die assembly hydraulic cylinder 8, a one-way valve 9, a third electromagnetic directional valve 10, an integrated block 11, a first oil inlet pipeline 12, a second oil inlet pipeline 13, a first oil return pipeline 14 and a second oil return pipeline 15, wherein two ends of the second oil inlet pipeline 13 are respectively connected with rodless cavities of the hydraulic oil tank 1 and the die assembly hydraulic cylinder 8, one end of the first oil inlet pipeline 12 is connected with the hydraulic oil tank 1, and the other end of the first oil inlet pipeline is connected to one end, close to the hydraulic oil tank 1, of the second oil inlet pipeline 13; a first electromagnetic directional valve 5 is arranged on the first oil inlet pipeline 12, a first oil return pipeline 14 is connected between the oil return side of the first electromagnetic directional valve 5 and the hydraulic oil tank 1, and a pressure release valve 6 is connected in parallel between one end of the first oil inlet pipeline 12, which is positioned on the oil return side of the first electromagnetic directional valve 5, and the first oil return pipeline 14; one end of the oil inlet pipeline I12 and one end of the oil inlet pipeline II 13, which are connected with the hydraulic oil tank 1, are respectively provided with a low-pressure large-flow hydraulic pump 3 and a high-pressure small-flow hydraulic pump 4, the low-pressure large-flow hydraulic pump 3 and the high-pressure small-flow hydraulic pump 4 are connected through a coupler, and the low-pressure large-flow hydraulic pump 3 is connected with the servo driving motor 2 through the coupler; the oil inlet pipeline II 13 is provided with a second electromagnetic directional valve 7 and an integrated block 11, the integrated block 11 is installed on a pressure forming machine, the integrated block 11 is integrated with a one-way valve 9 and a third electromagnetic directional valve 10, a rod cavity of the die assembly hydraulic cylinder 8 is connected with a second oil return pipeline 15, the second oil return pipeline 15 is connected with the third electromagnetic directional valve 10 and the second electromagnetic directional valve 7 in sequence and then connected to the hydraulic oil tank 1, the oil outlet end of the one-way valve 9 is connected with the oil inlet pipeline II 13, and the oil inlet end of the one-way valve 9 is connected with the third electromagnetic directional valve 10.
In this embodiment, in order to facilitate realization of automatic control, the first electromagnetic directional valve 5, the third electromagnetic directional valve 10, the pressure release valve 6, the second electromagnetic directional valve 7 and the one-way valve 9 are electrically connected with the master controller of the pressure forming machine, and whether a differential circuit is applied or not is freely switched through the control screen and the PLC.
The loop forming process can be divided into three stages: a mold closing stage, a pressurization stage and a mold opening stage.
In the mold closing stage, the servo driving motor 2 drives the low-pressure large-flow hydraulic pump 3 and the high-pressure small-flow hydraulic pump 4 to rotate to pump hydraulic oil, the first electromagnetic directional valve 5 is switched to the position of 2, the hydraulic oil pumped by the low-pressure large-flow hydraulic pump 3 and the high-pressure small-flow hydraulic pump 4 flows in parallel, the second electromagnetic directional valve 7 is switched to the position of 2, the third electromagnetic directional valve 10 is switched to the position of 2, the mold closing hydraulic cylinder 8 is provided with a rod cavity and a cylinder cavity which are communicated, a differential loop is formed, a formula P (A is a rod cavity-A is a rod cavity) is ma to obtain a continuous acceleration of the mold closing hydraulic cylinder 8, and the mold closing hydraulic cylinder 8 is used for rapidly closing a mold.
In the pressurizing stage, after the die closing hydraulic cylinder 8 rapidly moves to a certain distance, the first electromagnetic directional valve 5 is switched to the position of '1', hydraulic oil pumped by the low-pressure large-flow hydraulic pump 3 flows back to the hydraulic oil tank 1 through the pressure release valve 6, the second electromagnetic directional valve 7 is kept at the position of '2', the third electromagnetic directional valve 10 is switched to the position of '1', the connection of a rod cavity and a rodless cavity of the die closing hydraulic cylinder 8 is disconnected, the differential loop is cancelled, hydraulic oil pumped by the high-pressure small-flow hydraulic pump 4 is injected into the rodless cavity of the die closing hydraulic cylinder 8 for pressurization, and the die locking force of the pressure forming machine is ensured. When the pressure of the hydraulic oil pumped by the high-pressure small-flow hydraulic pump 4 is too high, the hydraulic oil is unloaded through the pressure relief valve 6, so that the safety of the system is ensured.
In the mold opening stage, the first electromagnetic directional valve 5 is switched to the position of 2, the hydraulic oil pumped by the low-pressure large-flow hydraulic pump 3 and the high-pressure small-flow hydraulic pump 4 flows in parallel, the second electromagnetic directional valve 7 is switched to the position of 1, the third electromagnetic directional valve 10 is kept at the position of 1, the hydraulic oil pumped by the low-pressure large-flow hydraulic pump 3 and the high-pressure small-flow hydraulic pump 4 is injected into a rod cavity of the mold closing hydraulic cylinder 8, and the mold closing hydraulic cylinder 8 retracts to open the mold.
To sum up, the utility model adopts the differential loop technology, compared with the traditional loop, the pump has small specification, small motor power, low energy consumption, energy conservation and environmental protection; the position switching of the third electromagnetic directional valve is adopted to control whether a differential circuit is applied or not, and the valve block used by the differential circuit is integrated on one valve block, the structure is simple and novel, the installation is convenient, and the differential circuit technology can be suitable for various hydraulic systems, such as: servo hydraulic systems, PQ valve hydraulic systems, and the like.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A die assembly control circuit of a pressure forming machine is characterized by comprising a hydraulic oil tank, an oil inlet pipeline I, an oil inlet pipeline II, an oil return pipeline I, an oil return pipeline II, an integrated block and a die assembly hydraulic cylinder, wherein two ends of the oil inlet pipeline II are respectively connected with the hydraulic oil tank and a rodless cavity of the die assembly hydraulic cylinder; a first electromagnetic reversing valve is arranged on the first oil inlet pipeline, and a first oil return pipeline is connected between the oil return side of the first electromagnetic reversing valve and the hydraulic oil tank; the oil inlet pipeline II is provided with a second electromagnetic reversing valve and an integrated block, the integrated block is installed on a pressure forming machine, the integrated block is integrated with a third electromagnetic reversing valve, a rod cavity of the die assembly hydraulic cylinder is connected with the second oil return pipeline, and the second oil return pipeline is sequentially connected with the third electromagnetic reversing valve and the second electromagnetic reversing valve and then is connected to the hydraulic oil tank.
2. The mold closing control circuit of a pressure molding machine according to claim 1, wherein a pressure relief valve is connected in parallel between one end of the oil inlet pipeline on the oil return side of the electromagnetic directional valve and the first oil return pipeline.
3. The mold closing control circuit of a pressure forming machine according to claim 1, wherein one end of the oil inlet pipeline I and the oil inlet pipeline II, which are connected with the hydraulic oil tank, are respectively provided with a low-pressure large-flow hydraulic pump and a high-pressure small-flow hydraulic pump, the low-pressure large-flow hydraulic pump and the high-pressure small-flow hydraulic pump are connected through a coupler, and the low-pressure large-flow hydraulic pump is connected with a servo drive motor through the coupler.
4. The mold closing control circuit of a pressure forming machine as claimed in claim 2, wherein a check valve is further integrated on the integrated block, an oil outlet end of the check valve is connected with the oil inlet pipeline II, and an oil inlet end of the check valve is connected with the electromagnetic directional valve III.
5. The mold closing control circuit of the pressure molding machine according to claim 4, wherein the first electromagnetic directional valve, the third electromagnetic directional valve, the pressure release valve, the second electromagnetic directional valve and the one-way valve are electrically connected with a master controller with a control screen.
6. The mold clamping control circuit of a pressure molding machine as claimed in claim 1, wherein the first electromagnetic directional valve and the third electromagnetic directional valve are two-position four-way electromagnetic directional valves.
7. The mold clamping control circuit of the pressure molding machine as claimed in claim 1, wherein the second electromagnetic directional valve is a three-position four-way electromagnetic directional valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020284950 | 2020-03-10 | ||
| CN2020202849502 | 2020-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214617260U true CN214617260U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022923853.6U Active CN214617260U (en) | 2020-03-10 | 2020-12-09 | Die closing control loop of pressure forming machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214617260U (en) |
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2020
- 2020-12-09 CN CN202022923853.6U patent/CN214617260U/en active Active
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