CN102029316A - Hydraulic control system of internal high-pressure forming machine - Google Patents
Hydraulic control system of internal high-pressure forming machine Download PDFInfo
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- CN102029316A CN102029316A CN 201010522777 CN201010522777A CN102029316A CN 102029316 A CN102029316 A CN 102029316A CN 201010522777 CN201010522777 CN 201010522777 CN 201010522777 A CN201010522777 A CN 201010522777A CN 102029316 A CN102029316 A CN 102029316A
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Abstract
The invention discloses a hydraulic control system of an internal high-pressure forming machine. A proportional overflow valve (5) is arranged on an oil inlet branch where a piston rod of a hydraulic cylinder of the hydraulic control system extends, and the control oil port of the proportional overflow valve (5) is communicated with the upper die cavity of the hydraulic cylinder. The proportional overflow valve is arranged on the oil inlet branch where the piston rod of the hydraulic cylinder extends, and the control oil port of the proportional overflow valve is communicated with the upper die cavity of the hydraulic cylinder, so the pressure of the system is controlled according to the magnitude proportion of the input current, the mold clamping force of the system can be adjusted in real time according to the change of pressure in a pipe, and waste of energy is avoided.
Description
Technical field
The present invention relates to the hydraulic press technical field, more particularly, relate to the hydraulic control system of internal high pressure forming machine.
Background technology
Make the field at automobile, Aeronautics and Astronautics, in order to reduce the production cost of hollow structural component, economical with materials, weight reduction improves part quality, and inner high voltage fluid power forming technique has obtained using more widely.Especially in automobile production, as the subframe of car, dashboard cross member etc. are all substituting original traditional diamond-making technique with inner high voltage fluid power manufacturing process gradually.The basic craft course of this technology is: at first pipe is placed in the die cavity, matched moulds then, sealed at both ends with pipe, and make and be full of liquid in the pipe, in the process of pressurization bulging, the drift at two ends inwardly advances feed supplement simultaneously, makes pipe recline mould inside shape chamber under the synergy of interior pressure and axle power like this and is configured as required workpiece.The key equipment that inner high voltage fluid power is shaped is the internal high pressure forming machine.
In the internal high pressure forming process, the hydraulic coupling of tubing inside is set up gradually, and raises by certain loading curve according to technological requirement, and therefore, the mold clamping force that requires clapper die spotting press is constantly to change.All the time under the highest tonnage, work for fear of the clamping pressure machine, cause energy waste, should adjust the mold clamping force of equipment, make clapper die spotting press be easy to realize pressure regulation and pressurize according to the variation of pipe internal pressure.
But, the single maximum pressure that the hydraulic control system of existing internal high pressure forming machine only can provide mould to need in the whole process action, promptly the final pressure that contacts with mould of work top will produce a large amount of energy wastes in its movement travel.
Summary of the invention
In view of this, the invention provides a kind of hydraulic control system of internal high pressure forming machine, with the variation according to the pipe internal pressure, the mold clamping force of real-time regulation system is avoided the waste of the energy.
For achieving the above object, the invention provides following technical scheme:
A kind of hydraulic control system of internal high pressure forming machine is provided with proportional pressure control valve on the oil-feed branch road that the piston rod of the feed flow cylinder pressure of this hydraulic control system stretches out, the control port of this proportional pressure control valve communicates with the upper cavity of hydraulic cylinder.
Preferably, in above-mentioned hydraulic control system, the control port of described proportional pressure control valve is connected with Pressure gauge.
Preferably, in above-mentioned hydraulic control system, also comprise the pressure inserted valve of the restriction system maximum pressure in parallel with described proportional pressure control valve.
Preferably, in above-mentioned hydraulic control system, the power source of this hydraulic control system is the pump group of being made up of vane pump and Variable plunger pump.
Preferably, in above-mentioned hydraulic control system, be connected with unloading overflow valve on the oil-feed branch road of described vane pump.
From above-mentioned technical scheme as can be seen, on the oil-feed branch road that the present invention stretches out by the piston rod at the feed flow cylinder pressure proportional pressure control valve is set, and the control port of this proportional pressure control valve is communicated with the upper cavity of hydraulic cylinder, therefore can be according to the pressure of the size control system of input current, can be according to the variation of pipe internal pressure, the mold clamping force of real-time regulation system is avoided the waste of the energy.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the internal high pressure forming machine that Fig. 1 provides for the embodiment of the invention.
The specific embodiment
The invention provides a kind of hydraulic control system of internal high pressure forming machine, with the variation according to the pipe internal pressure, the mold clamping force of real-time regulation system is avoided the waste of the energy.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
See also Fig. 1, the structural representation of the internal high pressure forming machine that Fig. 1 provides for the embodiment of the invention.
The hydraulic control system of internal high pressure forming machine provided by the invention is provided with proportional pressure control valve 5 on the oil-feed branch road that the piston rod of feed flow cylinder pressure stretches out, the control port of this proportional pressure control valve 5 communicates with the upper cavity of hydraulic cylinder.
On the oil-feed branch road that the present invention stretches out by the piston rod at the feed flow cylinder pressure proportional pressure control valve 5 is set, and the control port of this proportional pressure control valve 5 is communicated with the upper cavity of hydraulic cylinder, therefore can be according to the pressure of the size control system of input current, can be according to the variation of pipe internal pressure, by the mold clamping force of current adjusting system, avoided the waste of the energy in real time.
The present invention can also be connected with Pressure gauge in the control port of proportional pressure control valve 5, by Pressure gauge can real-time monitoring system pressure, with at required mold clamping force (mold clamping force that converts and to obtain according to the pipe internal pressure) and actual mold clamping force (actual mold clamping force can obtain according to the conversion pressure of hydralic pressure gauge monitoring) when not being inconsistent, in time passing ratio overflow valve 5 is adjusted actual mold clamping force, and is identical with required mold clamping force or be close with the mold clamping force of assurance system reality.Can reach on the basis that does not waste energy, guaranteeing does not have the gap between mould and the pipe.
The present invention can also comprise the pressure inserted valve 6 in parallel with described proportional pressure control valve, and pressure inserted valve 6 is used for the restriction system maximum pressure, when avoiding hypertonia, damages proportional pressure control valve 5 and hydraulic press itself.And when proportional pressure control valve 5 broke down, the infringement that when pressure inserted valve 6 can guarantee also that system pressure is too high press itself is caused had further improved the security performance of system.
The power source of the hydraulic control system that the present invention improves is the pump group of being made up of vane pump 1 and Variable plunger pump 2.The oil-feed branch road of vane pump 1 is served as reasons, and this pumps the hydraulic oil that comes enters hydraulic cylinder by pressure valve 4 upper cavity, the oil-feed branch road of Variable plunger pump 2 is served as reasons, and this pumps the hydraulic oil that comes enters hydraulic cylinder respectively by pressure valve 3 and pressure valve 4 upper cavity, therefore when pressurization, two pumps are worked simultaneously and can be realized quick pressurization.No longer describe at the oil-feed branch road that the control hydraulic cylinder rises for two pumps, two pumps are worked simultaneously, and slide block is gone up fast.
System is when pressurize, the slide block that is hydraulic press does not need to move, only need provide enough mold clamping forces to get final product, therefore for energy savings, on the oil-feed branch road of vane pump 1, be connected with unloading overflow valve 7, when pressure reaches the pressure of unloading overflow valve 7 setting, vane pump 1 off-load, Variable plunger pump 2 work.Mold clamping force when Variable plunger pump 2 provides pressurize for system, when slide block went up, vane pump 1 worked on, and slide block is gone up fast.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (5)
1. the hydraulic control system of an internal high pressure forming machine, it is characterized in that, be provided with proportional pressure control valve (5) on the oil-feed branch road that the piston rod of the feed flow cylinder pressure of this hydraulic control system stretches out, the control port of this proportional pressure control valve (5) communicates with the upper cavity of hydraulic cylinder.
2. hydraulic control system as claimed in claim 1 is characterized in that, the control port of described proportional pressure control valve (5) is connected with Pressure gauge.
3. hydraulic control system as claimed in claim 1 is characterized in that, also comprises the pressure inserted valve (6) of the restriction system maximum pressure in parallel with described proportional pressure control valve.
4. as each described hydraulic control system of claim 1-3, it is characterized in that the power source of this hydraulic control system is the pump group of being made up of vane pump (1) and Variable plunger pump (2).
5. as each described hydraulic control system of claim 1-3, it is characterized in that, be connected with unloading overflow valve (7) on the oil-feed branch road of described vane pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010522777 CN102029316A (en) | 2010-10-20 | 2010-10-20 | Hydraulic control system of internal high-pressure forming machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010522777 CN102029316A (en) | 2010-10-20 | 2010-10-20 | Hydraulic control system of internal high-pressure forming machine |
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| CN102029316A true CN102029316A (en) | 2011-04-27 |
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| CN 201010522777 Pending CN102029316A (en) | 2010-10-20 | 2010-10-20 | Hydraulic control system of internal high-pressure forming machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619813A (en) * | 2012-04-02 | 2012-08-01 | 大连理工大学 | Hydraulic system for precisely arranging stator shielding sleeve of nuclear main pump in gapless attachment way |
| CN104707890A (en) * | 2015-03-24 | 2015-06-17 | 燕山大学 | Automobile axle case piece hydraulic-bugling two-stage pressurization system |
| CN105729877A (en) * | 2016-04-15 | 2016-07-06 | 天津百利机械装备集团有限公司中央研究院 | Internal high-pressure forming machine with variable mold clamping force and internal high-pressure forming processing method |
| CN109931314A (en) * | 2019-03-22 | 2019-06-25 | 中国铁建重工集团有限公司 | Hydraulic system |
| CN110273871A (en) * | 2019-06-24 | 2019-09-24 | 江苏国力锻压机床有限公司 | A kind of safety-type torque shaft bending machine |
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| CN2235333Y (en) * | 1995-12-29 | 1996-09-18 | 浙江大学 | Hydraulic expansion and formation machine |
| FR2731811A1 (en) * | 1995-03-17 | 1996-09-20 | Gec Alsthom Acb | System for controlling hydraulic pressure in closed space, e.g. for hydraulic press cylinder |
| CN2510196Y (en) * | 2001-11-07 | 2002-09-11 | 华中科技大学 | Metal thin-plate hydraulic-forming die apparatus |
| CN1380149A (en) * | 2002-05-30 | 2002-11-20 | 佛山市佳能事液压机器制造有限公司 | Expanding method and equipment for implementing said expanding method |
| CN101618497A (en) * | 2008-07-04 | 2010-01-06 | 西安华立电器有限公司 | Metal hollow chopsticks moulding process and equipment |
| CN201524731U (en) * | 2009-04-04 | 2010-07-14 | 无锡硕恩自动化科技有限公司 | Oil pressure seamless three-way pipe forming device |
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2010
- 2010-10-20 CN CN 201010522777 patent/CN102029316A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2731811A1 (en) * | 1995-03-17 | 1996-09-20 | Gec Alsthom Acb | System for controlling hydraulic pressure in closed space, e.g. for hydraulic press cylinder |
| CN2235333Y (en) * | 1995-12-29 | 1996-09-18 | 浙江大学 | Hydraulic expansion and formation machine |
| CN2510196Y (en) * | 2001-11-07 | 2002-09-11 | 华中科技大学 | Metal thin-plate hydraulic-forming die apparatus |
| CN1380149A (en) * | 2002-05-30 | 2002-11-20 | 佛山市佳能事液压机器制造有限公司 | Expanding method and equipment for implementing said expanding method |
| CN101618497A (en) * | 2008-07-04 | 2010-01-06 | 西安华立电器有限公司 | Metal hollow chopsticks moulding process and equipment |
| CN201524731U (en) * | 2009-04-04 | 2010-07-14 | 无锡硕恩自动化科技有限公司 | Oil pressure seamless three-way pipe forming device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619813A (en) * | 2012-04-02 | 2012-08-01 | 大连理工大学 | Hydraulic system for precisely arranging stator shielding sleeve of nuclear main pump in gapless attachment way |
| CN104707890A (en) * | 2015-03-24 | 2015-06-17 | 燕山大学 | Automobile axle case piece hydraulic-bugling two-stage pressurization system |
| CN105729877A (en) * | 2016-04-15 | 2016-07-06 | 天津百利机械装备集团有限公司中央研究院 | Internal high-pressure forming machine with variable mold clamping force and internal high-pressure forming processing method |
| CN109931314A (en) * | 2019-03-22 | 2019-06-25 | 中国铁建重工集团有限公司 | Hydraulic system |
| CN109931314B (en) * | 2019-03-22 | 2024-05-14 | 中国铁建重工集团股份有限公司 | Hydraulic system |
| CN110273871A (en) * | 2019-06-24 | 2019-09-24 | 江苏国力锻压机床有限公司 | A kind of safety-type torque shaft bending machine |
| CN110273871B (en) * | 2019-06-24 | 2024-02-27 | 江苏扬力液压装备有限公司 | Safe type torsion bar bender |
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Application publication date: 20110427 |