CN102248702A - Hydraulic leveling system for pressing machine - Google Patents
Hydraulic leveling system for pressing machine Download PDFInfo
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- CN102248702A CN102248702A CN2011101561940A CN201110156194A CN102248702A CN 102248702 A CN102248702 A CN 102248702A CN 2011101561940 A CN2011101561940 A CN 2011101561940A CN 201110156194 A CN201110156194 A CN 201110156194A CN 102248702 A CN102248702 A CN 102248702A
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- sliding block
- displacement pump
- loop control
- control system
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Abstract
The invention discloses a hydraulic leveling system for a pressing machine, which belongs to the technical field of hydraulic leveling of pressing machines. The pressing machine and a frequency conversion regulating pump form a closed loop control system through a displacement sensor; the frequency conversion regulating pump is combined with a fixed displacement pump through a variable frequency motor to realize flow control; a frequency converter and the fixed displacement pump form a small closed loop control system through an encoder; and a sliding block parallelly moves relative to an operating platform by adjusting the pressure of a main working cylinder. By the technical scheme, the conventional technical principle is broken through; and the sliding block parallelly moves relative to the operating platform by adjusting the pressure of the main working cylinder. The system is easy to operate technically, is accurately controlled, and solves the problems of low compression accuracy and the like caused by the deflection of the sliding block due to moment generated by imbalanced force applied to the sliding block and a mold in the process of pressing the sliding block downwards.
Description
Technical field
The present invention relates to a kind of hydraulic leveling system of press, belong to press hydraulic leveling technical field.
Background technology
Be mainly used in 8000 tons of hydraulic presses of compacting nuclear power AP1000 steel containment vessel end socket limb, in the process of compacting steel containment vessel end socket limb, when having only slide block to press down and the work top opposing parallel move and reach technological requirement, could guarantee the head lamellae pressing-molding precision.Traditional press leveling technology can't reach the required precision of nuclear power product.
Summary of the invention
In view of the defective that prior art exists, the purpose of this invention is to provide and a kind ofly can adjust effectively that slide block presses down in the process because the moment of the suffered force unbalance generation of slide block and mould makes the hydraulic leveling system of the press of the problems such as die mould low precision that the slide block deflection causes.
For achieving the above object, the technology used in the present invention solution is: a kind of hydraulic leveling system of press, and press constitutes closed-loop control system by displacement transducer and variable frequency adjustment pump; The variable frequency adjustment pump adopts variable-frequency motor and constant displacement pump combination to realize flow-control; Frequency converter and constant displacement pump constitute little closed-loop control system by encoder; By the adjusting of main working cylinder pressure being realized slide block moves relative to workbench is parallel.
The operation principle of described press hydraulic leveling system is: kicker cylinder oil feed line UNICOM equates each kicker cylinder operating pressure, speed; The variable frequency adjustment pump adopts variable-frequency motor and constant displacement pump combination to realize flow-control, and frequency converter and constant displacement pump form little closed-loop control system by encoder, and realization can be regulated each main working cylinder downforce to importing the flow-control of each master cylinder hydraulic pressure oil.
Technical scheme of the present invention has been broken traditional know-why, moves relative to workbench is parallel by the adjusting of main working cylinder pressure being realized slide block.This technology is simple to operate, and control has accurately solved slide block and pressed down in the process because the problems such as die mould low precision that the moment of the suffered force unbalance generation of slide block and mould causes the slide block deflection.And the technical program is applicable to the hydraulic leveling of each large, medium and small swaging machine.
Description of drawings
Fig. 1 measures the adjustment schematic diagram of slide block deviation data and master cylinder power for press;
Fig. 2 is the hydraulic schematic diagram that press master cylinder power is adjusted.
Among the figure: 1, main working cylinder, 2, slide block, 3, workbench, 4, frequency converter, 5, constant displacement pump, 6, encoder, F
1, F
2, F
3, each main working cylinder downforce, S
1, S
2, S
3, slide block with respect to workbench each the height.
The specific embodiment
A kind of hydraulic leveling system of press, press constitutes closed-loop control system by displacement transducer and variable frequency adjustment pump; The variable frequency adjustment pump adopts frequency conversion electrical equipment 4 and constant displacement pump 5 combinations to realize flow-control; Frequency converter 4 constitutes little closed-loop control system with constant displacement pump 5 by encoder 6; By the adjusting of main working cylinder pressure being realized slide block moves relative to workbench is parallel.
The operation principle of press hydraulic leveling system shown in Figure 2 is: kicker cylinder oil feed line UNICOM equates each kicker cylinder operating pressure, speed; The variable frequency adjustment pump adopts variable-frequency motor and constant displacement pump combination to realize flow-control, and frequency converter and constant displacement pump form little closed-loop control system by encoder, and realization can be regulated each main working cylinder downforce to importing the flow-control of each master cylinder hydraulic pressure oil.
Press shown in Figure 1 is measured in the adjustment schematic diagram of slide block deviation data and master cylinder power, and each that presses down that displacement transducer in the process measures slide block 2 relative workbench 3 at slide block 2 be S highly
1, S
2, S
3, and the gained data being fed back to the variable frequency adjustment pump, the variable frequency adjustment pump adopts frequency converter 4 and constant displacement pump 5 combinations to realize flow-controls, and frequency converter 4 constitutes little closed-loop control system with constant displacement pump 5 by encoder 6, with the downforce F of each main working cylinder 1 of accurate adjusting
1, F
2, F
3, make on the slide block 2 to produce and cause the opposite moment of slide block 2 deflection moments, moment of face is cancelled out each other, reached by to the adjusting realization slide block 2 of main working cylinder 1 downforce relative to the workbench 3 parallel purposes that move.
Claims (2)
1. the hydraulic leveling system of a press is characterized in that press constitutes closed-loop control system by displacement transducer and variable frequency adjustment pump; The variable frequency adjustment pump adopts frequency conversion electrical equipment (4) and constant displacement pump (5) combination to realize flow-control; Frequency converter (4) constitutes little closed-loop control system with constant displacement pump (5) by encoder (6); Realize that by adjusting slide block (2) is relative to parallel the moving of workbench (1) to main working cylinder (1) pressure.
2. the hydraulic leveling system of a kind of press according to claim 1 is characterized in that operation principle is: kicker cylinder oil feed line UNICOM equates each kicker cylinder operating pressure, speed; The variable frequency adjustment pump adopts frequency conversion electrical equipment (4) and constant displacement pump (5) combination to realize flow-control, and frequency converter (4) constitutes little closed-loop control system with constant displacement pump (5) by encoder (6), realization can be regulated each main working cylinder (1) downforce to importing the flow-control of each master cylinder hydraulic pressure oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101561940A CN102248702A (en) | 2011-06-13 | 2011-06-13 | Hydraulic leveling system for pressing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101561940A CN102248702A (en) | 2011-06-13 | 2011-06-13 | Hydraulic leveling system for pressing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102248702A true CN102248702A (en) | 2011-11-23 |
Family
ID=44976438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101561940A Pending CN102248702A (en) | 2011-06-13 | 2011-06-13 | Hydraulic leveling system for pressing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102248702A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660359A (en) * | 2013-11-19 | 2014-03-26 | 浙江大学 | Hydraulic control system and method for passive type four-corner-leveling hydraulic press |
| CN105818417A (en) * | 2016-05-24 | 2016-08-03 | 郭文坤 | Pressure self-balanced punching machine |
| CN112664494A (en) * | 2020-12-04 | 2021-04-16 | 天津天锻航空科技有限公司 | Hydraulic control system of double-acting liquid-filling forming hydraulic machine |
-
2011
- 2011-06-13 CN CN2011101561940A patent/CN102248702A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660359A (en) * | 2013-11-19 | 2014-03-26 | 浙江大学 | Hydraulic control system and method for passive type four-corner-leveling hydraulic press |
| CN103660359B (en) * | 2013-11-19 | 2015-06-17 | 浙江大学 | Hydraulic control system and method for passive type four-corner-leveling hydraulic press |
| CN105818417A (en) * | 2016-05-24 | 2016-08-03 | 郭文坤 | Pressure self-balanced punching machine |
| CN112664494A (en) * | 2020-12-04 | 2021-04-16 | 天津天锻航空科技有限公司 | Hydraulic control system of double-acting liquid-filling forming hydraulic machine |
| CN112664494B (en) * | 2020-12-04 | 2023-05-23 | 天津天锻航空科技有限公司 | Hydraulic control system of double-acting liquid-filled forming hydraulic press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111123 |