CN210595087U - Hydraulic drive servo control's lower part liftout mechanism - Google Patents
Hydraulic drive servo control's lower part liftout mechanism Download PDFInfo
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- CN210595087U CN210595087U CN201921274344.6U CN201921274344U CN210595087U CN 210595087 U CN210595087 U CN 210595087U CN 201921274344 U CN201921274344 U CN 201921274344U CN 210595087 U CN210595087 U CN 210595087U
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Abstract
The utility model discloses a hydraulic drive servo control's lower part liftout mechanism, it includes the hydraulic pressure station, the liftout hydro-cylinder, the liftout piston, the liftout round pin, hydraulic servo valve and the position detection mechanism who is used for detecting liftout round pin ejection position, the hydraulic fluid port has been seted up down to the bottom of liftout hydro-cylinder, hydraulic servo valve has and rises, descend, stop three work position, the upper portion of liftout hydro-cylinder has seted up the oil feeding mouth, hydraulic servo valve respectively with the hydraulic fluid port of hydraulic pressure station, the oil feeding mouth is linked together, the switching-over of hydraulic servo valve between three work position is decided by the detection signal of position detection mechanism and the ejecting target position that the user set for, hydraulic servo valve commutates to the ascending work position through the oil feeding mouth down and through the oil feeding mouth draining, commutate to the descending work position through the oil feeding mouth and through; the ejection mechanism has the advantages that the requirements of different ejection positions can be met only by one type of ejection pin, the ejection efficiency is improved, the ejection response speed is high, and the accuracy of the ejection positions is high.
Description
Technical Field
The utility model relates to a lower part liftout mechanism especially relates to a hydraulic drive servo control's lower part liftout mechanism.
Background
Presses or shears or the like have a lower ejector mechanism which acts on the mould. The existing lower ejection mechanism is shown in fig. 1, and comprises a hydraulic station 1, an ejection cylinder 2 fixed in a press machine frame 91, an ejection piston 3 movably arranged in an inner cavity of the ejection cylinder 2, and an ejection pin 4 movably and vertically arranged in the press machine frame 91, wherein an oil through opening 28 communicated with the inner cavity of the ejection cylinder 2 is arranged at the bottom of the ejection cylinder 2, an oil pipeline 27 is arranged between the oil opening of the hydraulic station 1 and the oil through opening 28 of the ejection cylinder 2, a switch valve (not shown in the figure) is additionally arranged on the oil pipeline 27, an air vent 29 communicated with the inner cavity of the ejection cylinder 2 is arranged at the upper part of the ejection cylinder 2, the lower part of the ejection piston 3 is connected with the inner cavity wall of the ejection cylinder 2 in a sealing contact manner, the top of the ejection piston 3 extends out of the top of the ejection cylinder 2, the bottom of the ejection pin 4 is abutted against the top of the ejection piston 3, when the ejection piston 3 does not work, the top of the ejection pin 4 is flush with the top of the press frame 91 or slightly lower than the top of the press frame 91, and the top of the ejection pin 4 is connected with the bottom of the die 92 in a matching mode. The working process of the lower ejection mechanism is as follows: opening a switching valve, providing hydraulic oil for the material ejecting oil cylinder 2 by the hydraulic station 1 through the switching valve, and pushing the material ejecting piston 3 to move upwards by the hydraulic oil entering the material ejecting oil cylinder 2 so as to drive the material ejecting pin 4 to move upwards; and closing the switch valve, enabling the ejection piston 3 to move downwards under the self-weight action of the ejection pin 4 and the ejection piston 3, and draining the hydraulic oil in the ejection oil cylinder 2 through the switch valve to finish the ejection action. Although the lower ejection mechanism can smoothly complete the ejection action, the following problems exist: in actual production, in order to enable the lower ejection mechanism of the press to act on more different dies 92, a customer needs to adjust the upward ejection position of the lower ejection mechanism, however, the lower ejection mechanism can only perform simple ascending and descending actions, and each ascending, the lower ejection mechanism needs to ascend to the top, the lower ejection mechanism needs to descend to the bottom, and the lower ejection mechanism cannot stop in the middle, in order to meet the requirements of different ejection positions, the lower ejection mechanism can only be realized by changing the length of the ejection pin 4, so that the ejection pins 4 in the die library 93 are various in types, troubles are brought to management, meanwhile, the ejection pins 4 are frequently mistaken and still need to be removed and replaced again when dies are replaced, the workload is increased undoubtedly, the ejection position adjustment mode by changing the length of the ejection pins leads to low ejection efficiency, and the automation degree of the production process of the press is higher and higher, the mold is developed in various directions, the lower ejection mechanism is required to respond quickly and eject and stop at any position, and the ejection position adjustment mode by changing the length of the ejection pin cannot change the position of the ejection return stroke.
Disclosure of Invention
The utility model aims to solve the technical problem that a hydraulic drive servo control's lower part liftout mechanism is provided, its demand that only needs the liftout round pin of a type just can satisfy different ejecting positions has effectively promoted ejecting efficiency, and ejecting response speed is fast, ejecting position degree of accuracy is high.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a hydraulic drive servo control's lower part liftout mechanism, includes hydraulic pressure station, liftout hydro-cylinder, liftout piston, liftout round pin, the bottom of liftout hydro-cylinder seted up with the inner chamber of liftout hydro-cylinder be linked together lower hydraulic fluid port, the lower part of liftout piston with the inner chamber wall of liftout hydro-cylinder between sealed, its characterized in that: the lower ejection mechanism also comprises a hydraulic servo valve and a position detection mechanism which is arranged in a press machine frame and used for detecting the ejection position of the ejection pin, wherein the hydraulic servo valve is provided with a rising working position used for controlling the upward movement of the ejection pin, a falling working position used for controlling the downward movement of the ejection pin and a stopping working position used for controlling the stopping movement of the ejection pin, the upper part of the ejection oil cylinder is provided with an upper oil port communicated with the inner cavity of the ejection oil cylinder, the upper part of the ejection piston is sealed with the top of the ejection oil cylinder, the hydraulic servo valve is respectively communicated with the oil port of the hydraulic station, the lower oil port and the upper oil port, the reversing of the hydraulic servo valve among the three working positions is determined by the detection signal of the position detection mechanism and the ejection target position set by a user, the hydraulic servo valve is used for reversing to a rising working position and then passing through the oil inlet of the lower oil port and oil drainage of the upper oil port, and the hydraulic servo valve is used for reversing to a falling working position and then passing through the oil inlet of the upper oil port and oil drainage of the lower oil port.
The hydraulic servo valve is also at least provided with an oil inlet, two oil outlets and an oil outlet, the oil inlet of the hydraulic servo valve is communicated with the oil port of the hydraulic station, one oil outlet of the hydraulic servo valve is communicated with the lower oil port, the other oil outlet of the hydraulic servo valve is communicated with the upper oil port, and the oil outlet of the hydraulic servo valve is communicated with the oil port of the hydraulic station.
The position detection mechanism is composed of a detection rod which is vertically arranged at the bottom of the ejection piston and moves up and down along with the ejection piston, and a position sensor which is arranged at the outer bottom of the ejection oil cylinder, wherein the bottom end of the detection rod penetrates through the bottom of the ejection oil cylinder and extends out, the detection rod and the bottom of the ejection oil cylinder are sealed, the length of the exposed part of the detection rod is greater than the maximum stroke of the ejection piston, and the position sensor is positioned under the bottom of the detection rod. The detection rod is fixedly locked on the bottom of the ejection piston, so that the detection rod and the ejection piston form a whole and can ascend or descend together with the ejection piston; the length of the exposed part of the detection rod is required to be larger than the maximum stroke of the ejection piston, namely, the detection rod still partially extends out of the bottom of the ejection oil cylinder when the ejection piston rises to the highest position.
The length of the exposed part of the detection rod is 10 mm-300 mm greater than the maximum stroke of the ejection piston. The length of the exposed part of the detection rod can be determined according to the requirements of users, and the reasonable range is 10 mm-300 mm exceeding the maximum stroke of the ejection piston, such as 40mm exceeding the maximum stroke of the ejection piston.
The lower ejection mechanism further comprises a controller, wherein the output end of the position sensor and the input end of the hydraulic servo valve are respectively connected with the controller, and the controller controls the hydraulic servo valve to change directions. When a user uses the lower ejection mechanism, the ejection target position can be automatically set, so that the controller automatically stores the ejection target position set by the user, the position sensor detects the ejection target position in real time and outputs a detection signal representing the real-time ejection position of the ejection pin to the controller, and the controller controls the hydraulic servo valve to change the direction according to the received detection signal and the ejection target position set by the user; here, the controller accomplishes this function easily.
A cooler is arranged between an oil discharge port of the hydraulic servo valve and an oil port of the hydraulic station, an inlet of the cooler is communicated with the oil discharge port of the hydraulic servo valve, and an outlet of the cooler is communicated with the oil port of the hydraulic station. Because the temperature of the oil discharged from the liftout oil cylinder is relatively high, namely the temperature of the oil discharged into the hydraulic station through the hydraulic servo valve is high, a cooler is arranged between an oil discharge port of the hydraulic servo valve and an oil port of the hydraulic station, so that the oil temperature of the oil which is fed again is not high, the change of the ejection position along with the rise of the oil temperature is avoided, and the accuracy of the ejection position is improved.
An energy accumulator is arranged between an oil port of the hydraulic station and an oil inlet of the hydraulic servo valve, an inlet of the energy accumulator is communicated with the oil port of the hydraulic station, and an outlet of the energy accumulator is communicated with the oil inlet of the hydraulic servo valve. The energy accumulator is arranged between the oil port of the hydraulic station and the oil inlet of the hydraulic servo valve, so that the response speed of the lower ejection mechanism is improved under the conditions that a power source of the hydraulic station is unstable and the response is slow.
The hydraulic servo valve is a three-position four-way hydraulic servo valve. The function of the lower ejection mechanism can be realized by selecting the three-position four-way hydraulic servo valve, and the three-position five-way hydraulic servo valve can be selected in actual use.
The hydraulic servo valve, the cooler and the energy accumulator are all additionally arranged on the hydraulic station. The hydraulic servo valve, the cooler and the energy accumulator are additionally arranged on the original hydraulic station, so that the occupied space of the lower ejection mechanism is saved.
Compared with the prior art, the utility model has the advantages of:
1) an upper oil port communicated with an inner cavity of the material ejecting oil cylinder is arranged at the upper part of the material ejecting oil cylinder, a hydraulic servo valve and a position detection mechanism are additionally arranged, the hydraulic servo valve is respectively communicated with an oil port, a lower oil port and an upper oil port of a hydraulic station, and the reversing of the hydraulic servo valve among three working positions is determined by a detection signal of the position detection mechanism and a push-out target position set by a user, so that the hydraulic servo valve can control oil feeding or oil discharging or no oil feeding and no oil discharging, a material ejecting piston moves upwards to drive a material ejecting pin to ascend when the oil is fed, the material ejecting piston moves downwards to drive the material ejecting pin to descend when the oil is discharged, the material ejecting pin reaches the push-out target position set by the user when the oil is not fed and the oil is not discharged, the material ejecting action is finished, and the hydraulic servo valve can perform the function of stopping at any push-out position according to the detection signal of the position detection mechanism, so that only, the management of the ejection pins in the die warehouse is facilitated, the ejection pins do not need to be replaced as long as the ejection pins are not damaged during die replacement, the workload of operators is reduced, and the die replacement speed and accuracy are improved.
2) The ejection position of the ejection pin is servo-controlled by the hydraulic servo valve, so that the ejection response speed and the ejection position accuracy of the lower ejection mechanism are improved.
3) The lower ejection mechanism can meet the requirements of high intelligence, automation and mold diversification in the production process of the press machine.
Drawings
FIG. 1 is a simplified schematic diagram of a conventional lower ejector mechanism;
fig. 2 is a simple schematic diagram of the lower ejection mechanism of the present invention;
fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The first embodiment is as follows:
the lower ejection mechanism comprises a hydraulic station 1, an ejection cylinder 2 fixed in a press frame 91, an ejection piston 3 movably arranged in an inner cavity of the ejection cylinder 2, an ejection pin 4 movably and vertically arranged in the press frame 91 and used for ejecting a mold 92 arranged on the top of the press frame 91, a hydraulic servo valve 5 and a position detection mechanism 6 arranged in the press frame 91 and used for detecting the ejection position of the ejection pin 4, a lower oil port 21 communicated with the inner cavity of the ejection cylinder 2 is formed in the bottom of the ejection cylinder 2, the lower part of the ejection piston 3 is sealed with the inner cavity wall of the ejection cylinder 2, the top of the ejection piston 3 extends out of the top of the ejection cylinder 2 and is abutted against the bottom of the ejection pin 4, the top of the ejection pin 4 is connected with the bottom of the mold 92 in a matching manner, and the hydraulic servo valve 5 is provided with a lifting working position used for controlling the upward movement of the ejection pin 4, A descending working position for controlling the downward movement of the ejection pin 4 and a stopping working position for controlling the stopping movement of the ejection pin 4, the hydraulic servo valve 5 is also provided with an oil inlet 51, two oil outlets 52, 53 and an oil outlet 54, the upper part of the ejection cylinder 2 is provided with an upper oil port 22 communicated with the inner cavity of the ejection cylinder 2, the upper part of the ejection piston 3 is sealed with the top of the ejection cylinder 2, the oil inlet 51 of the hydraulic servo valve 5 is communicated with the oil port of the hydraulic station 1, one oil outlet 52 of the hydraulic servo valve 5 is communicated with the lower oil port 21, the other oil outlet 53 of the hydraulic servo valve 5 is communicated with the upper oil port 22, the oil outlet 54 of the hydraulic servo valve 5 is communicated with the oil port of the hydraulic station 1, the reversing of the hydraulic servo valve 5 among the three working positions is determined by the detection signal of the position detection mechanism 6 and the ejection target position set by the oil inlet of the user, when the hydraulic servo valve 5 is reversed to the ascending working position, the oil is drained through the lower oil, when the hydraulic servo valve 5 is reversed to a descending working position, oil is fed through the upper oil port 22 and is discharged through the lower oil port 21, and when the hydraulic servo valve 5 is reversed to a stopping working position, oil is not fed and is not discharged.
In the present embodiment, the hydraulic station 1 employs the prior art.
Example two:
the present embodiment proposes a hydraulically driven servo-controlled lower ejector mechanism, which defines a specific structure of the position detection mechanism 6 in the lower ejector mechanism of the first embodiment, that is, the position detection mechanism 6 is composed of a detection rod 61 vertically installed on the bottom of the ejector piston 3 and moving up and down along with the ejector piston 3, and a position sensor 62 installed on the outer bottom of the ejector cylinder 2, the bottom end of the detection rod 61 penetrates through and extends out of the bottom of the ejector cylinder 2, a seal is formed between the detection rod 61 and the bottom of the ejector cylinder 2, the length of the exposed portion of the detection rod 61 is greater than the maximum stroke of the ejector piston 3, and the position sensor 62 is located right below the bottom of the detection rod 61. The detection rod 61 is fixedly locked on the bottom of the ejection piston 3, so that the detection rod 61 and the ejection piston 3 form a whole and can ascend or descend together with the ejection piston 3; the length of the exposed part of the detecting rod 61 is required to be larger than the maximum stroke of the ejecting piston 3, namely, when the ejecting piston 3 is required to rise to the highest position, part of the detecting rod 61 still extends out of the bottom of the ejecting oil cylinder 2.
In the present embodiment, the length of the exposed portion of the sensing rod 61 is 10mm to 300mm greater than the maximum stroke of the ejector piston 3. The length of the exposed part of the sensing rod 61 can be determined according to the user's requirement, and is reasonably in the range of 10mm to 300mm exceeding the maximum stroke of the ejector piston 3, such as 40mm exceeding the maximum stroke of the ejector piston 3.
In the present embodiment, the sensing rod 61 is made of a commonly used steel material; the position sensor 62 is of the prior art.
Example three:
in the lower ejection mechanism of the hydraulic drive servo control proposed in this embodiment, a controller (not shown in the figure) is added on the basis of the lower ejection mechanism of the first embodiment or the second embodiment, the output end of the position sensor 62 and the input end of the hydraulic servo valve 5 are respectively connected with the controller, and the controller controls the hydraulic servo valve 5 to change the direction. When a user uses the lower ejection mechanism, the ejection target position can be automatically set, so that the controller automatically stores the ejection target position set by the user, the position sensor 62 detects the ejection target position in real time and outputs a detection signal representing the real-time ejection position of the ejection pin 4 to the controller, and the controller controls the hydraulic servo valve 5 to change the direction according to the received detection signal and the ejection target position set by the user; here, the controller accomplishes this function easily.
Example four:
the hydraulic drive servo control lower ejection mechanism proposed by the present embodiment is further improved on the basis of the lower ejection mechanisms of the above embodiments, that is: a cooler 7 is arranged between the oil discharge port 54 of the hydraulic servo valve 5 and the oil port of the hydraulic station 1, the inlet of the cooler 7 is communicated with the oil discharge port 54 of the hydraulic servo valve 5, the outlet of the cooler 7 is communicated with the oil port of the hydraulic station 1, and the cooler 7 is additionally arranged on the hydraulic station 1. Because the temperature of the oil discharged from the liftout cylinder 2 is relatively high, that is, the temperature of the oil discharged into the hydraulic station 1 through the hydraulic servo valve 5 is high, the cooler 7 is arranged between the oil discharge port 54 of the hydraulic servo valve 5 and the oil port of the hydraulic station 1, so that the oil temperature of the oil which is fed again is not high, the change of the ejection position along with the rise of the oil temperature is avoided, and the accuracy of the ejection position is improved.
Example five:
the hydraulic drive servo control lower ejection mechanism proposed by the present embodiment is further improved on the basis of the lower ejection mechanisms of the above embodiments, that is: an energy accumulator 8 is arranged between an oil port of the hydraulic station 1 and an oil inlet 51 of the hydraulic servo valve 5, an inlet of the energy accumulator 8 is communicated with the oil port of the hydraulic station 1, an outlet of the energy accumulator 8 is communicated with the oil inlet 51 of the hydraulic servo valve 5, and the energy accumulator 8 is additionally arranged on the hydraulic station 1. By arranging the energy accumulator 8 between the oil port of the hydraulic station 1 and the oil inlet 51 of the hydraulic servo valve 5, the response speed of the lower ejection mechanism is improved under the conditions that the power source of the hydraulic station 1 is unstable and the response is slow.
In the above embodiments, the hydraulic servo valve 5 is a three-position four-way hydraulic servo valve, and the hydraulic servo valve 5 is additionally installed on the hydraulic station 1. The function of the lower ejection mechanism can be realized by selecting the three-position four-way hydraulic servo valve, and the three-position five-way hydraulic servo valve can be selected in actual use.
Claims (9)
1. The utility model provides a hydraulic drive servo control's lower part liftout mechanism, includes hydraulic pressure station, liftout hydro-cylinder, liftout piston, liftout round pin, the bottom of liftout hydro-cylinder seted up with the inner chamber of liftout hydro-cylinder be linked together lower hydraulic fluid port, the lower part of liftout piston with the inner chamber wall of liftout hydro-cylinder between sealed, its characterized in that: the lower ejection mechanism also comprises a hydraulic servo valve and a position detection mechanism which is arranged in a press machine frame and used for detecting the ejection position of the ejection pin, wherein the hydraulic servo valve is provided with a rising working position used for controlling the upward movement of the ejection pin, a falling working position used for controlling the downward movement of the ejection pin and a stopping working position used for controlling the stopping movement of the ejection pin, the upper part of the ejection oil cylinder is provided with an upper oil port communicated with the inner cavity of the ejection oil cylinder, the upper part of the ejection piston is sealed with the top of the ejection oil cylinder, the hydraulic servo valve is respectively communicated with the oil port of the hydraulic station, the lower oil port and the upper oil port, the reversing of the hydraulic servo valve among the three working positions is determined by the detection signal of the position detection mechanism and the ejection target position set by a user, the hydraulic servo valve is used for reversing to a rising working position and then passing through the oil inlet of the lower oil port and oil drainage of the upper oil port, and the hydraulic servo valve is used for reversing to a falling working position and then passing through the oil inlet of the upper oil port and oil drainage of the lower oil port.
2. The hydraulically driven servo controlled lower ejector mechanism of claim 1, wherein: the hydraulic servo valve is also at least provided with an oil inlet, two oil outlets and an oil outlet, the oil inlet of the hydraulic servo valve is communicated with the oil port of the hydraulic station, one oil outlet of the hydraulic servo valve is communicated with the lower oil port, the other oil outlet of the hydraulic servo valve is communicated with the upper oil port, and the oil outlet of the hydraulic servo valve is communicated with the oil port of the hydraulic station.
3. A hydraulically driven servo controlled lower ejector mechanism as claimed in claim 1 or 2, wherein: the position detection mechanism is composed of a detection rod which is vertically arranged at the bottom of the ejection piston and moves up and down along with the ejection piston, and a position sensor which is arranged at the outer bottom of the ejection oil cylinder, wherein the bottom end of the detection rod penetrates through the bottom of the ejection oil cylinder and extends out, the detection rod and the bottom of the ejection oil cylinder are sealed, the length of the exposed part of the detection rod is greater than the maximum stroke of the ejection piston, and the position sensor is positioned under the bottom of the detection rod.
4. A hydraulically driven servo controlled lower ejector mechanism as in claim 3, wherein: the length of the exposed part of the detection rod is 10 mm-300 mm greater than the maximum stroke of the ejection piston.
5. A hydraulically driven servo controlled lower ejector mechanism as in claim 3, wherein: the lower ejection mechanism further comprises a controller, wherein the output end of the position sensor and the input end of the hydraulic servo valve are respectively connected with the controller, and the controller controls the hydraulic servo valve to change directions.
6. The hydraulically driven servo controlled lower ejector mechanism of claim 2, wherein: a cooler is arranged between an oil discharge port of the hydraulic servo valve and an oil port of the hydraulic station, an inlet of the cooler is communicated with the oil discharge port of the hydraulic servo valve, and an outlet of the cooler is communicated with the oil port of the hydraulic station.
7. The hydraulically driven servo controlled lower ejector mechanism of claim 6, wherein: an energy accumulator is arranged between an oil port of the hydraulic station and an oil inlet of the hydraulic servo valve, an inlet of the energy accumulator is communicated with the oil port of the hydraulic station, and an outlet of the energy accumulator is communicated with the oil inlet of the hydraulic servo valve.
8. The hydraulically driven servo controlled lower ejector mechanism of claim 2, wherein: the hydraulic servo valve is a three-position four-way hydraulic servo valve.
9. The hydraulically driven servo controlled lower ejector mechanism of claim 7, wherein: the hydraulic servo valve, the cooler and the energy accumulator are all additionally arranged on the hydraulic station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921274344.6U CN210595087U (en) | 2019-08-07 | 2019-08-07 | Hydraulic drive servo control's lower part liftout mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921274344.6U CN210595087U (en) | 2019-08-07 | 2019-08-07 | Hydraulic drive servo control's lower part liftout mechanism |
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| CN210595087U true CN210595087U (en) | 2020-05-22 |
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| CN201921274344.6U Active CN210595087U (en) | 2019-08-07 | 2019-08-07 | Hydraulic drive servo control's lower part liftout mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110422792A (en) * | 2019-08-07 | 2019-11-08 | 宁波念初机械工业有限公司 | A kind of lower part material jacking mechanism of hydraulic driving servo control |
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2019
- 2019-08-07 CN CN201921274344.6U patent/CN210595087U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110422792A (en) * | 2019-08-07 | 2019-11-08 | 宁波念初机械工业有限公司 | A kind of lower part material jacking mechanism of hydraulic driving servo control |
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