CN213954071U - Efficient and stable hydraulic system of large plate shearing machine - Google Patents
Efficient and stable hydraulic system of large plate shearing machine Download PDFInfo
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- CN213954071U CN213954071U CN202022777474.0U CN202022777474U CN213954071U CN 213954071 U CN213954071 U CN 213954071U CN 202022777474 U CN202022777474 U CN 202022777474U CN 213954071 U CN213954071 U CN 213954071U
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Abstract
The utility model discloses a high-efficiency stable hydraulic system of a large-scale plate shearing machine, which comprises a hydraulic pump, an electromagnetic overflow valve, a one-way pressure reducing valve, a material pressing oil cylinder, an electromagnetic hydraulic reversing valve, a main oil cylinder, an auxiliary oil cylinder and a top rest, the oil inlet of the hydraulic pump is communicated and connected with the oil tank through a filter, the oil outlet of the hydraulic pump is simultaneously connected with the electromagnetic overflow valve, the one-way pressure reducing valve and the P port of the electromagnetic hydraulic reversing valve, the material pressing oil cylinder is connected with the one-way pressure reducing valve through a hydraulic oil pipe, the main oil cylinder is connected with an A port of the electromagnetic hydraulic reversing valve through a hydraulic oil pipe, the main oil cylinder and the auxiliary oil cylinder are connected in series, the end parts of piston rods of the main oil cylinder and the auxiliary oil cylinder are connected with the upper tool rest, and the problem of reversing hydraulic impact is solved by using an electromagnetic hydraulic reversing valve, so that the upper tool rest stops at any position in the operation process, the pressure of the system is unloaded, and the system can be unloaded without the power failure of an electromagnetic overflow valve; the shearing efficiency is improved; the fine adjustment of the knife edge gap can be completed by a single person, and the knife adjustment efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of plate shearing machine hydraulic system, specifically speaking, the utility model relates to a hydraulic system is stabilized to large-scale plate shearing machine high efficiency.
Background
The hydraulic system of original large-scale floodgate formula plate shearing machine, in the work operation in-process, the problem that exists has:
firstly, the method comprises the following steps: the return stroke of a common energy accumulator is that an upper tool rest can not be stopped at any position, so that at least two persons operate simultaneously to finish the adjustment of the knife edge gap, wherein one person controls a high-pressure ball valve on the top of a machine to slowly discharge oil, so that the upper tool rest moves upwards from a bottom dead center point by a little and moves upwards by a little, then the person at the position of a machine workbench finely adjusts the knife edge gap by a small clearance gauge by a little to achieve the optimal shearing effect of the plate shearing machine, and the knife adjusting mode needs two persons to operate simultaneously, so that the knife adjusting efficiency is low.
Secondly, the method comprises the following steps: the main oil cylinder is limited in an oil absorption mode, so that under the condition that the weight of the upper tool rest is large, when the upper tool rest descends rapidly, a rodless cavity of the main oil cylinder is vacuumized, no hydraulic oil is supplemented in time, the rodless cavity of the main oil cylinder is vacuumed, and hydraulic impact is generated; slowing down the downlink speed greatly affects the stability of the system on the one hand and the work efficiency on the other hand.
Thirdly, the method comprises the following steps: in the hydraulic system of the original large gate type plate shearing machine, the pressure of a material pressing oil cylinder is basically determined by the shearing pressure during shearing of the machine, and the shearing pressure is unstable under different working conditions, so that the pressure of the material pressing oil cylinder is unstable under the condition of too small or too large pressure.
Fourthly: in the hydraulic system of the original large-scale gate type plate shearing machine, when an energy accumulator is filled with liquid, the pressure of the energy accumulator can be determined only by a pressure gauge arranged on the energy accumulator, and under the condition that a main overflow valve is in fault or is blocked, the pressure of the energy accumulator can rise linearly, so that safety accidents are likely to occur.
Fifth, the method comprises the following steps: in the hydraulic system of the original large gate type plate shearing machine, the upper tool rest moves downwards from the upper dead point position, and when a thin plate is sheared, the idle stroke is overlong, and the shearing efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydraulic system is stabilized to large-scale plate shearing machine high efficiency to solve the problem that exists among the above-mentioned background art.
In order to realize the purpose, the utility model discloses the technical scheme who takes does: the utility model provides a hydraulic system is stabilized to high efficiency of large-scale plate shearing machine, includes hydraulic pump, electromagnetism overflow valve, one-way pressure reducing valve, presses the material hydro-cylinder, electromagnetism hydraulic reversing valve, master cylinder, vice hydro-cylinder and top rest, the oil inlet of hydraulic pump communicates with each other with the oil tank through the filter and is connected, the oil-out of hydraulic pump is connected with the P mouth of electromagnetism overflow valve, one-way pressure reducing valve and electromagnetism hydraulic reversing valve simultaneously, press the material hydro-cylinder to pass through hydraulic tubing with one-way pressure reducing valve and be connected, the master cylinder passes through hydraulic tubing with the A mouth of electromagnetism hydraulic reversing valve and is connected, master cylinder and vice hydro-cylinder establish ties, the tailpiece of the piston rod portion and the top rest of master cylinder and vice hydro-cylinder are connected.
Preferably, the outside of master cylinder is equipped with left return stroke hydro-cylinder, the outside of vice hydro-cylinder is equipped with right return stroke hydro-cylinder, the piston rod tip and the last knife rest left side of left return stroke hydro-cylinder are articulated, the piston rod tip and the last knife rest right side of right return stroke hydro-cylinder are articulated.
Preferably, the high-efficiency stable hydraulic system of the large plate shearing machine further comprises an energy accumulator, rod cavities of the left return oil cylinder and the right return oil cylinder are communicated and connected with the energy accumulator through hydraulic oil pipes, and a direct-acting overflow valve and a first pressure gauge are arranged on the hydraulic oil pipes which are used for communicating the rod cavities of the left return oil cylinder and the right return oil cylinder with the energy accumulator.
Preferably, the oil outlet of the hydraulic pump is connected with the rod cavity of the main oil cylinder and the rodless cavity of the auxiliary oil cylinder through the first electromagnetic directional valve.
Preferably, the oil outlet of the hydraulic pump is connected with the energy accumulator through a second electromagnetic directional valve.
Preferably, the rodless cavity of the master cylinder is connected with the oil tank through a one-way valve.
Preferably, an oil outlet of the hydraulic pump is connected with a second pressure gauge.
The beneficial effect of adopting above technical scheme is:
1. the utility model discloses a high-efficient stable hydraulic system of large-scale plate shearing machine utilizes electromagnetism switching-over valve that surges, has not only solved the instantaneous switching-over hydraulic shock problem of ordinary switching-over valve, and electromagnetism switching-over valve that surges adopts M type meso position function moreover, makes the top rest stop in the optional position of operation process, and system pressure uninstallation does not need the electricity loss of electromagnetism overflow valve also can let the system uninstall; on one hand, in the rapid downward shearing process of the upper tool rest, the upper tool rest does not need to move to the upper dead center position and then move downward, the idle stroke of secondary shearing is short, and the shearing efficiency is improved; on the other hand, the energy accumulator returns, the upper tool rest can stop at any position, and a single person can finish the fine adjustment of the tool edge gap, so that the tool adjustment efficiency is improved.
2. The utility model discloses a hydraulic system is stabilized to large-scale plate shearing machine high efficiency, the rodless chamber of master cylinder passes through the check valve and is connected with the oil tank, and at the quick down in-process of top rest, the rodless chamber of master cylinder produces the vacuum to under the effect of atmospheric pressure, the rodless chamber of master cylinder inhales oil from the oil tank, has guaranteed the down speed and the hydraulic system stability of top rest.
3. The utility model discloses a hydraulic system is stabilized to high efficiency of large-scale plate shearing machine, the oil-out and the one-way relief pressure valve of hydraulic pump are connected, press the material hydro-cylinder to pass through hydraulic pressure oil pipe with one-way relief pressure valve and be connected, set up one-way relief pressure valve in front pressing the material hydro-cylinder, make the pressure in the exit of one-way relief pressure valve keep invariable, do not receive the influence of load pressure and flow, can make the pressure of pressing the material hydro-cylinder reach the constancy value, guarantee the stability when the work piece is waited to cut.
Drawings
FIG. 1 is a schematic diagram of a high-efficiency stable hydraulic system of a large-scale plate shearing machine of the utility model;
wherein:
1. a hydraulic pump; 2. an electromagnetic spill valve; 3. a one-way pressure relief valve; 4. a material pressing oil cylinder; 5. an electromagnetic hydraulic directional valve; 6. a master cylinder; 7. an auxiliary oil cylinder; 8. a left return oil cylinder; 9. a right return oil cylinder; 10. an accumulator; 11. a first electromagnetic directional valve; 12. a second electromagnetic directional valve; 13. a direct-acting overflow valve; 14. a first pressure gauge; 15. a second pressure gauge;
YA1, a first electromagnetic valve; YA2 and a second electromagnetic valve; YA3 and a third electromagnetic valve; YA4 and a fourth electromagnetic valve; YA5 and a five-solenoid valve.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
As shown in figure 1, the utility model relates to a high-efficiency stable hydraulic system of a large-scale plate shearing machine, which utilizes an electromagnetic hydraulic reversing valve to solve the problem of reversing hydraulic impact, so that an upper tool rest stops at any position in the operation process, the pressure of the system is unloaded, and the system can be unloaded without the power loss of an electromagnetic overflow valve; the shearing efficiency is improved; the fine adjustment of the knife edge gap can be completed by a single person, and the knife adjustment efficiency is improved.
Specifically, as shown in fig. 1, the hydraulic pump comprises a hydraulic pump 1, an electromagnetic overflow valve 2, a one-way pressure reducing valve 3, a material pressing oil cylinder 4, an electromagnetic hydraulic reversing valve 5, a main oil cylinder 6, an auxiliary oil cylinder 7 and an upper tool rest, wherein an oil inlet of the hydraulic pump 1 is communicated and connected with an oil tank through a filter, an oil outlet of the hydraulic pump 1 is simultaneously connected with P ports of the electromagnetic overflow valve 2, the one-way pressure reducing valve 3 and the electromagnetic hydraulic reversing valve 5, the material pressing oil cylinder 4 is connected with the one-way pressure reducing valve 3 through a hydraulic oil pipe, the main oil cylinder 6 is connected with an A port of the electromagnetic hydraulic reversing valve 5 through a hydraulic oil pipe, the main oil cylinder 6 and the auxiliary oil cylinder 7 are connected in series, and the end portions of piston rods of the main oil cylinder 6 and the auxiliary oil cylinder 7 are connected with the upper tool rest.
The outside of master cylinder 6 is equipped with left return stroke hydro-cylinder 8, the outside of vice hydro-cylinder 7 is equipped with right return stroke hydro-cylinder 9, the piston rod tip of left return stroke hydro-cylinder 8 is articulated on the left of the upper tool rest, the piston rod tip of right return stroke hydro-cylinder 9 is articulated on the right of the upper tool rest.
The high-efficiency stable hydraulic system of the large plate shearing machine further comprises an energy accumulator 10, rod cavities of the left return oil cylinder 8 and the right return oil cylinder 9 are communicated and connected with the energy accumulator 10 through hydraulic oil pipes, and a direct-acting overflow valve 13 and a pressure gauge 14 are arranged on the hydraulic oil pipes which are used for communicating the rod cavities of the left return oil cylinder 8 and the right return oil cylinder 9 with the energy accumulator 10.
An oil outlet of the hydraulic pump 1 is simultaneously connected with a rod cavity of the main oil cylinder 6 and a rodless cavity of the auxiliary oil cylinder 7 through a first electromagnetic directional valve 11.
The oil outlet of the hydraulic pump 1 is connected with the energy accumulator 10 through a second electromagnetic directional valve 12.
And a rodless cavity of the main oil cylinder 6 is connected with an oil tank through a one-way valve.
And an oil outlet of the hydraulic pump 1 is connected with a second pressure gauge 15.
The following specific working modes are illustrated by specific examples:
example 1:
and (3) rapid downward shearing action of an upper tool rest: the electromagnetic valve II YA2, the electromagnetic valve III YA3 and the electromagnetic valve V YA5 are all powered off, the electromagnetic valve IV YA4 is powered on first, hydraulic oil pumped by the hydraulic pump 1 enters a rodless cavity of the material pressing oil cylinder 4 through the one-way pressure reducing valve 3, and the material pressing oil cylinder 4 presses a workpiece to be cut first.
After 0.5S, the first electromagnetic valve YA1 is electrified, the right position of the electromagnetic hydraulic reversing valve 5 is communicated, at the moment, a port P on the electromagnetic hydraulic reversing valve 5 is communicated with a port A, a port B is communicated with a port T, hydraulic oil enters a rodless cavity of the main oil cylinder 6 through the electromagnetic hydraulic reversing valve 5 to push a piston rod of the main oil cylinder 6 to move downwards, hydraulic oil in a rod cavity of the main oil cylinder 6 enters a rodless cavity of the serially connected auxiliary oil cylinder 7 to push a piston rod of the auxiliary oil cylinder 7 to synchronously move downwards, and the quick downward shearing action of the upper tool rest is realized.
In the process, because the end part of the piston rod of the left return oil cylinder 8 is hinged with the left side of the upper tool rest, the end part of the piston rod of the right return oil cylinder 9 is hinged with the right side of the upper tool rest, and rod cavities of the left return oil cylinder 8 and the right return oil cylinder 9 are communicated and connected with the energy accumulator 10 through hydraulic oil pipes, hydraulic oil in the rod cavities of the left return oil cylinder 8 and the right return oil cylinder 9 directly enters the energy accumulator 10.
In the rapid downward shearing process of the upper tool rest, the electromagnetic valve YA1 is de-energized, so that the upper tool rest can be stopped at any position in the operation process, the electromagnetic hydraulic reversing valve 5 is utilized, the problem of instantaneous reversing hydraulic impact of a common reversing valve is solved, the electromagnetic hydraulic reversing valve 5 adopts an M-shaped middle position function, the upper tool rest is stopped at any position in the operation process, the pressure of a system is unloaded, and the system can be unloaded without the power loss of the electromagnetic overflow valve 2; the upper tool rest does not need to move to the upper dead center position and then move downwards, the idle stroke of secondary shearing is short, and the shearing efficiency is improved.
The utility model discloses a hydraulic system is stabilized to large-scale plate shearing machine high efficiency, the rodless chamber of master cylinder 6 passes through the check valve and is connected with the oil tank, and at the quick down in-process of top rest, the rodless chamber of master cylinder produces the vacuum to under the effect of atmospheric pressure, the rodless chamber of master cylinder has guaranteed the down speed and the hydraulic system stability of top rest from the oil tank oil absorption.
The utility model discloses a hydraulic system is stabilized to large-scale plate shearing machine high efficiency, the oil-out of hydraulic pump 1 is connected with one-way relief pressure valve 3, press material hydro-cylinder 4 to be connected through hydraulic pressure oil pipe with one-way relief pressure valve 3, set up one-way relief pressure valve 3 before pressing material hydro-cylinder 4, make the pressure in the exit of one-way relief pressure valve 3 keep invariable, do not receive the influence of load pressure and flow, can make the pressure of pressing material hydro-cylinder 4 reach the constancy value, guarantee the stability when the work piece is waited to cut.
Example 2:
upward return motion of the upper tool rest: the first electromagnetic valve YA1, the third electromagnetic valve YA3, the fourth electromagnetic valve YA4 and the fifth electromagnetic valve YA5 are all de-energized, the second electromagnetic valve YA2 is energized, the left position of the electromagnetic hydraulic reversing valve 5 is communicated, at the moment, a port P on the electromagnetic hydraulic reversing valve 5 is communicated with a port B, a port A is communicated with a port T, hydraulic oil pumped by the hydraulic pump 1 enters an oil tank through the electromagnetic overflow valve 2 for unloading, and the hydraulic oil in a rodless cavity of the material pressing oil cylinder 4 returns to the oil tank through the one-way pressure reducing valve 3 and the electromagnetic overflow valve 2 under the action of spring force in the material pressing oil cylinder 4; a rodless cavity of the main oil cylinder 6 is directly communicated with an oil tank through an A port and a T port.
At this time, the hydraulic oil stored in the energy accumulator 10 enters the rod cavities of the left return oil cylinder 8 and the right return oil cylinder 9, and simultaneously pushes the piston rods of the left return oil cylinder 8 and the right return oil cylinder 9 to move upwards to drive the upper tool rest to move upwards, and the hydraulic oil in the rod-free cavity of the main oil cylinder 6 directly enters the oil tank through the electromagnetic hydraulic reversing valve 5.
In the upward return process of the upper tool rest, the upper tool rest can be stopped at any position, and a single person can finish the fine adjustment of the knife edge gap, so that the knife adjustment efficiency is improved.
Example 3:
increase of upper tool rest shear angle: the first electromagnetic valve YA1, the second electromagnetic valve YA2, the fourth electromagnetic valve YA4 and the fifth electromagnetic valve YA5 are all powered off, the third electromagnetic valve YA3 is powered on, the system pressure is unloaded through the M-shaped middle position function of the electromagnetic hydraulic reversing valve 5 at the moment, hydraulic oil stored by the energy accumulator 10 enters the rod cavities of the left return oil cylinder 8 and the right return oil cylinder 9, the rod cavity of the main oil cylinder 6 is in a closed state, the piston rod of the left return oil cylinder 8 is fixed at the moment, the piston rod of the right return oil cylinder 9 drives the right side of the upper tool rest to move upwards, and redundant hydraulic oil in the rod cavity of the main oil cylinder 6 and the rod cavity of the auxiliary oil cylinder 7 returns to an oil tank through the first electromagnetic reversing valve 11 (at the moment, the main oil cylinder 6 and the auxiliary oil cylinder 7 are connected into the oil tank in series through the first electromagnetic reversing valve 11), so that the shearing angle increasing action of the upper tool rest is realized.
The upper tool rest shear angle is reduced: the first electromagnetic valve YA1, the third electromagnetic valve YA3 and the fifth electromagnetic valve YA5 are all de-energized, the second electromagnetic valve YA2 and the fourth electromagnetic valve YA4 are energized, the left position of the electromagnetic hydraulic reversing valve 5 is communicated, at the moment, a port P on the electromagnetic hydraulic reversing valve 5 is communicated with a port B, a port A is communicated with a port T, and a rodless cavity of the main oil cylinder 6 is communicated with an oil tank through the port A and the port T; hydraulic oil pumped by the hydraulic pump 1 enters a rod cavity of the main oil cylinder 6 and a rodless cavity of the auxiliary oil cylinder 7 through the first electromagnetic directional valve 11, a piston rod of the main oil cylinder 6 drives the left side of the upper tool rest to move upwards to the upper dead center position, a piston rod of the auxiliary oil cylinder 7 drives the right side of the upper tool rest to move downwards, the hydraulic oil in the rodless cavity of the main oil cylinder 6 returns to an oil tank through the second electromagnetic hydraulic directional valve 5, and small shearing angle action of the upper tool rest is achieved.
Example 4:
filling the energy accumulator: when the first electromagnetic valve YA1, the third electromagnetic valve YA3 are de-energized, the second electromagnetic valve YA2, the fourth electromagnetic valve YA4 and the fifth electromagnetic valve YA5 are energized, hydraulic oil pumped by the hydraulic pump 1 directly enters the energy accumulator 10 through the second electromagnetic directional valve 12, and the upper tool rest is in the top dead center position in the final state, so that the energy accumulator 10 is charged.
A hydraulic oil pipe for communicating the rod cavity of the left return oil cylinder 8 and the right return oil cylinder 9 with the energy accumulator 10 is provided with a direct-acting overflow valve 13 which is used as a safety valve of the energy accumulator 10, and the safety problem caused by overhigh pressure of the energy accumulator does not need to be considered in the actual use process.
The present invention has been described in detail with reference to the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments, but is intended to cover various insubstantial modifications, including those made by the method and technical solutions of the present invention; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (7)
1. The utility model provides a hydraulic system is stabilized to high efficiency of large-scale plate shearing machine which characterized in that: including hydraulic pump (1), electromagnetism overflow valve (2), one-way relief valve (3), press material hydro-cylinder (4), electromagnetism hydraulic reversing valve (5), master cylinder (6), auxiliary cylinder (7) and top rest, the oil inlet of hydraulic pump (1) communicates with each other through filter and oil tank and is connected, the oil-out of hydraulic pump (1) is connected with the P mouth of electromagnetism overflow valve (2), one-way relief valve (3) and electromagnetism hydraulic reversing valve (5) simultaneously, press material hydro-cylinder (4) to be connected through hydraulic tubing with one-way relief valve (3), master cylinder (6) pass through hydraulic tubing with the A mouth of electromagnetism hydraulic reversing valve (5) and are connected, master cylinder (6) and auxiliary cylinder (7) are established ties, the piston rod tip and the top rest of master cylinder (6) and auxiliary cylinder (7) are connected.
2. The efficient and stable hydraulic system of the large plate shearing machine as claimed in claim 1, wherein: the outside of master cylinder (6) is equipped with left return stroke hydro-cylinder (8), the outside of vice hydro-cylinder (7) is equipped with right return stroke hydro-cylinder (9), the piston rod tip and the last knife rest left side of left side return stroke hydro-cylinder (8) are articulated, the piston rod tip and the last knife rest right side of right side return stroke hydro-cylinder (9) are articulated.
3. The efficient and stable hydraulic system of a large plate shearing machine as claimed in claim 2, wherein: the hydraulic oil pipe is characterized by further comprising an energy accumulator (10), rod cavities of the left return oil cylinder (8) and the right return oil cylinder (9) are communicated and connected with the energy accumulator (10) through hydraulic oil pipes, and a direct-acting overflow valve (13) and a pressure gauge I (14) are arranged on the hydraulic oil pipes which are used for communicating the rod cavities of the left return oil cylinder (8) and the right return oil cylinder (9) and the energy accumulator (10).
4. The efficient and stable hydraulic system of the large plate shearing machine as claimed in claim 1, wherein: an oil outlet of the hydraulic pump (1) is simultaneously connected with a rod cavity of the main oil cylinder (6) and a rodless cavity of the auxiliary oil cylinder (7) through a first electromagnetic directional valve (11).
5. The efficient and stable hydraulic system of a large plate shearing machine as claimed in claim 3, wherein: an oil outlet of the hydraulic pump (1) is connected with the energy accumulator (10) through a second electromagnetic directional valve (12).
6. The efficient and stable hydraulic system of a large plate shearing machine as claimed in claim 3, wherein: and a rodless cavity of the main oil cylinder (6) is connected with an oil tank through a one-way valve.
7. The efficient and stable hydraulic system of the large plate shearing machine as claimed in claim 1, wherein: an oil outlet of the hydraulic pump (1) is connected with a second pressure gauge (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022777474.0U CN213954071U (en) | 2020-11-26 | 2020-11-26 | Efficient and stable hydraulic system of large plate shearing machine |
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| CN202022777474.0U CN213954071U (en) | 2020-11-26 | 2020-11-26 | Efficient and stable hydraulic system of large plate shearing machine |
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| CN213954071U true CN213954071U (en) | 2021-08-13 |
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