CN103448288A - Hydraulic pull rod tensioning device for press - Google Patents
Hydraulic pull rod tensioning device for press Download PDFInfo
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- CN103448288A CN103448288A CN2013103630997A CN201310363099A CN103448288A CN 103448288 A CN103448288 A CN 103448288A CN 2013103630997 A CN2013103630997 A CN 2013103630997A CN 201310363099 A CN201310363099 A CN 201310363099A CN 103448288 A CN103448288 A CN 103448288A
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- plunger
- pull bar
- strainer
- press
- hydraulic
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Abstract
The invention discloses a hydraulic pull rod tensioning device for a press. The device comprises hydraulic pull rod tensioners. The hydraulic pull rod tensioners are arranged at the top ends of pull rods on the upper side of the press respectively, and each hydraulic pull rod tensioner comprises a cap nut, a tensioner plunder cylinder, a plunger, at least two pressure plates, an unloading valve and three equal-height cushion blocks, wherein the three equal-height cushion blocks of each hydraulic pull rod tensioner are arranged around a corresponding pull rod nut at the top of a beam on the press in a delta shape; the top ends of the pull rods penetrate through the plungers; the tensioner plunger cylinders are supported on the three equal-height cushion blocks; the lower sides of the cap nuts are pressed against the upper sides of the plungers; high-pressure oil output by a hydraulic pump station is divided into a plurality of paths through a flow divider, and the paths are connected with pipe joints fixedly arranged on the tensioner plunger cylinders respectively; the tensioner plunger cylinders also lead to the unloading valves. The device is simple and compact in structure and high in working efficiency; four pull rods of the press can be simultaneously tensioned, and are prevented from eccentric loads, so that the accuracy and the rigidity of the press are improved, and the manufacturing cost is greatly lowered.
Description
Technical field
The present invention relates to a kind of pre-load means of press machine draw bar, when installing, especially a kind of forcing press is used for elongating pull bar, after the pull bar unloading, make part of pressure machine connect tightr, and make the take-up device of the press machine draw bar of many pull bar uniform stresseds, belong to metal forming machinery installation accessories technical field.
Background technology
The entablature of large-tonnage straight side press or frame type hydraulic press, the armstand of both sides and sill link into an integrated entity by four pull bars of its left and right sides setting, straight side press or frame type hydraulic press are when large load condition pressing component, it is larger that four pull bars of its both sides bear load, after pull bar is installed, loading onto take-up device in the pull bar upper end makes pull bar produce the strain of elongation, cause the pull-rod nut bottom surface to break away from supporting plane, now can coil and strain at stem nut, take-up device unloading back stay restores to the original state, thereby make the entablature of forcing press, armstand is connected tightr with sill, four pull bars are stressed more even, improve the compacting precision of forcing press or hydraulic press, prevent due to four pull bar discontinuity, the equipment breakdown that wherein stressed the maximum easily is pulled off.
The pull bar of existing large tonnage pressing machine adopts pull bar hydraulic tensioning device to apply one by one pulling force to single pull bar and is strained, efficiency is very low, and easily cause the tightening force of a pull bar excessive, other three are difficult to tension, forcing press only has single pull bar tension, pull bar and fuselage, in the unbalance loading state, cause forcing press precision sideslip, and there will be pull bar to break and the problems such as part of pressure machine damage.
Existing pull bar hydraulic tensioning device is by the outer support cylinder, inner cylinder body, threaded plunger, the inner support seat and and all multiple components such as cap form, huge heaviness, expensive, think highly of as the pull bar hydraulic tensioning of 1250T forcing press and reach 1356Kg, the hoisting transportation inconvenience; During use, need larger installing space, could place after steady and be strained pull bar.The screw thread of the threaded plunger of hydraulic tensioning device must be equipped with different screw threads by the forcing press of different tonnages, versatility is poor, has strengthened manufacturing cost and the maintenance cost of hydraulic tensioning device.
the Chinese invention patent of CN202239427 discloses a kind of " great tonnage hydraulic machine Duola bar pre-tightening apparatus ", the connector of this device is bulky, the internal thread of connector lower end is connected with the pull bar upper end, and the connector upper end passes hydraulic pre-tightening cylinder piston and is connected with locking member.This patent of invention still adopts the aforesaid single pull bar pattern of pretension one by one, inevitably exists the defect of aforementioned pull bar hydraulic tensioning device.Connector is bulky, and the internal thread of its lower end must singly join by the different pull rod screw of different tonnage forcing presses, lacks versatility, increases manufacturing cost.Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, the press machine draw bar fluid-pressure straining device that can simultaneously strain many pull bars.
The present invention is achieved by the following technical programs:
A kind of press machine draw bar fluid-pressure straining device, comprise the pull bar hydraulic tensioning device be separately positioned on every pull bar top of forcing press upside, described pull bar hydraulic tensioning device comprises and cap nut, strainer plunger cylinder, plunger, at least two block pressur plates, unloader and three equal height cushion blocks, described three equal height cushion blocks are arranged on the pull-rod nut surrounding at press crown top in a triangle, plunger is arranged in the strainer plunger cylinder, the pull bar top is through plunger, and the strainer plunger cylinder is supported on three equal height cushion blocks; And the cap nut is screwed on termination, pull bar upper end, and cap nut downside is resisted against the plunger upside; At least two block pressur plate one ends are separately fixed at strainer plunger cylinder upside, and the pressing plate other end points to the axial centre of strainer plunger cylinder; The hydraulic oil of hydraulic power unit output by flow distributor be divided into multichannel respectively be fixed on the strainer plunger cylinder on pipe joint be connected.
Purpose of the present invention can also further realize by following technical measures.
Aforesaid press machine draw bar fluid-pressure straining device, wherein said plunger is many steps plunger, be provided with several sealing rings between plunger and strainer plunger cylinder endoporus, plunger central authorities are provided with the plunger axially extending bore that aperture is greater than the pull bar external diameter, and the pull bar upper end is through described plunger axially extending bore.
Aforesaid press machine draw bar fluid-pressure straining device, wherein being enclosed within every strainer plunger cylinder on the pull bar top communicates with the flow distributor output by pipe joint, connecting line respectively, the flow distributor input leads to hydraulic power unit, and the strainer plunger cylinder also leads to unloader.
The present invention is simple in structure, high efficiency, four pull bars of tensioning pressure machine, make it not be subject to eccentric load simultaneously, improved precision and the rigidity of forcing press, every pull bar hydraulic tensioning device all communicates with flow distributor by unloader, can effectively prevent the too high damage the present invention of pressure fuel pump.It is even that flow distributor of the present invention outputs to the flow of four pull bar hydraulic tensioning devices, can ensure that each pull bar hydraulic tensioning device strains pull bar reposefully, and the tension speed of pull bar hydraulic tensioning device is reached unanimously, guarantees that every pull bar is stressed evenly.The present invention replaces the support tube of existing huge structure with three contour back-up blocks, guarantee that four pull bar hydraulic tensioning devices are at the drop-down bar that strains at of parastate.Structure of the present invention is small and exquisite, easy to maintenance.The pull bar hydraulic tensioning device used as the 1250T forcing press is reduced to and only has 285Kg from existing ponderable 1356Kg, and weight has reduced 79%, and both convenient the use, greatly reduced again manufacturing cost.
Advantage and disadvantage of the present invention, will be for illustration and explanation by the non-limitative illustration of following preferred embodiment, and these embodiment, only provide as an example with reference to accompanying drawing.
The accompanying drawing explanation
Fig. 1 is pull bar hydraulic tensioning device half sectional view of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is use state sketch of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As depicted in figs. 1 and 2, the present invention includes the pull bar hydraulic tensioning device be separately positioned on every pull bar top of forcing press upside, described pull bar hydraulic tensioning device comprises and cap nut 1, strainer plunger cylinder 2, plunger 3, at least two block pressur plates 4, unloader 5 and three equal height cushion blocks 6, equal height cushion block 6 adopts turning to be processed into highly equal cylinder, three equal height cushion blocks 6 are arranged on pull-rod nut 7 surroundings that are positioned at press crown 20 tops in a triangle, plunger 3 is arranged in strainer plunger cylinder 2, pull bar 8 tops are through plunger 3, each strainer plunger cylinder 2 is supported on three equal height cushion blocks 6 that highly equate, can guarantee that four pull bar hydraulic tensioning devices are at the drop-down bar 8 that strains at of parastate, guarantee that four pull bars 8 are stressed evenly.And cap nut 1 is screwed on pull bar 8 terminations, upper end, and cap nut 1 downside is resisted against plunger 3 upsides, two block pressur plate 4 one ends are separately fixed at strainer plunger cylinder 2 upsides, pressing plate 4 other ends point to the axial centre of strainer plunger cylinder 2, prevent in carrying when of the present invention the plunger 3 strainer plunger cylinder 2 that drops out.
As shown in Figure 3, the hydraulic oil of hydraulic power unit 10 output by flow distributor 9 be divided into four tunnels respectively be fixed on strainer plunger cylinder 2 on pipe joint 11 be connected.It is even that flow distributor 9 outputs to the flow of four pull bar hydraulic tensioning devices, can ensure that each pull bar hydraulic tensioning device strains pull bar 8 reposefully, and the tension speed of pull bar hydraulic tensioning device is reached unanimously, makes every pull bar 8 stressed evenly.
The strainer plunger cylinder 2 be enclosed within on every pull bar 8 tops communicates with flow distributor 9 outputs by pipe joint 11, connecting line 103 respectively, and flow distributor 9 inputs lead to hydraulic power unit 10, and strainer plunger cylinder 2 also leads to unloader 5.
Before pretension, use spanner to coil respectively and strain at stem nut 7 and and cap nut 1.Start hydraulic power unit 10, the hydraulic oil input flow rate distributor 9 of the 40MPa of hydraulic power unit 10 outputs, enter respectively the oiling cavity 23 of strainer plunger cylinder lower end by corresponding connecting line 103, pipe joint 11 from four outputs of flow distributor 9, four plungers 3 synchronously rise, four pull bars 8 synchronously are elongated, dish strains at stem nut 7 again respectively, completes the tension of four pull bars 8.Then close hydraulic power unit 10, open on each strainer plunger cylinder 2 unloader 5, the off-load of pull bar hydraulic tensioning device, plunger 3 drops to initial position, can remove the present invention.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (3)
1. a press machine draw bar fluid-pressure straining device, it is characterized in that, comprise that the pull bar hydraulic tensioning device be separately positioned on every pull bar top of forcing press upside, described pull bar hydraulic tensioning device comprise and cap nut, strainer plunger cylinder, plunger, at least two block pressur plates, unloader and three equal height cushion blocks, described three equal height cushion blocks are arranged on the pull-rod nut surrounding at press crown top in a triangle, plunger is arranged in the strainer plunger cylinder, the pull bar top is through plunger, and the strainer plunger cylinder is supported on three equal height cushion blocks; And the cap nut is screwed on termination, pull bar upper end, and cap nut downside is resisted against the plunger upside; At least two block pressur plate one ends are separately fixed at strainer plunger cylinder upside, and the pressing plate other end points to the axial centre of strainer plunger cylinder; The hydraulic oil of hydraulic power unit output by flow distributor be divided into multichannel respectively be fixed on the strainer plunger cylinder on pipe joint be connected.
2. press machine draw bar fluid-pressure straining device as claimed in claim 1, it is characterized in that: described plunger is many steps plunger, be provided with several sealing rings between described plunger and strainer plunger cylinder endoporus, plunger central authorities are provided with the plunger axially extending bore that aperture is greater than the pull bar external diameter, and the pull bar upper end is through described plunger axially extending bore.
3. press machine draw bar fluid-pressure straining device as claimed in claim 1, it is characterized in that: be enclosed within every strainer plunger cylinder on the pull bar top and communicate with the flow distributor output by pipe joint, connecting line respectively, the flow distributor input leads to hydraulic power unit, and the strainer plunger cylinder also leads to unloader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363099.7A CN103448288B (en) | 2013-08-20 | 2013-08-20 | Press machine draw bar fluid-pressure straining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363099.7A CN103448288B (en) | 2013-08-20 | 2013-08-20 | Press machine draw bar fluid-pressure straining device |
Publications (2)
| Publication Number | Publication Date |
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| CN103448288A true CN103448288A (en) | 2013-12-18 |
| CN103448288B CN103448288B (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310363099.7A Expired - Fee Related CN103448288B (en) | 2013-08-20 | 2013-08-20 | Press machine draw bar fluid-pressure straining device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60145222A (en) * | 1983-12-29 | 1985-07-31 | Kurimoto Iron Works Ltd | Cylinder device for rising and falling frame |
| CN2732385Y (en) * | 2004-09-29 | 2005-10-12 | 天津市天锻压力机有限公司 | Combined machine body drag bar pre-fastening device |
| CN200992468Y (en) * | 2006-12-12 | 2007-12-19 | 合肥锻压机床有限公司 | Combined frame type body hydraulic pre-fastening device |
| CN201102227Y (en) * | 2007-08-23 | 2008-08-20 | 上海电机学院 | Integral hydraulic drawing device |
| CN201389771Y (en) * | 2009-04-24 | 2010-01-27 | 十堰海岚机床有限公司 | Hydraulic pre-tensioning device |
| CN101823114A (en) * | 2010-04-09 | 2010-09-08 | 太原重工股份有限公司 | Double-post inclined type multi-pull-rod prestress machine frame of free forging hydrostatic press |
| CN202239427U (en) * | 2011-09-20 | 2012-05-30 | 天津市天锻压力机有限公司 | Large-tonnage hydraulic press multi-pull-rod pre-tightening device |
| CN203401755U (en) * | 2013-08-20 | 2014-01-22 | 沃得精机(中国)有限公司 | Hydraulic tensioning device of pull rods of press machine |
-
2013
- 2013-08-20 CN CN201310363099.7A patent/CN103448288B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60145222A (en) * | 1983-12-29 | 1985-07-31 | Kurimoto Iron Works Ltd | Cylinder device for rising and falling frame |
| CN2732385Y (en) * | 2004-09-29 | 2005-10-12 | 天津市天锻压力机有限公司 | Combined machine body drag bar pre-fastening device |
| CN200992468Y (en) * | 2006-12-12 | 2007-12-19 | 合肥锻压机床有限公司 | Combined frame type body hydraulic pre-fastening device |
| CN201102227Y (en) * | 2007-08-23 | 2008-08-20 | 上海电机学院 | Integral hydraulic drawing device |
| CN201389771Y (en) * | 2009-04-24 | 2010-01-27 | 十堰海岚机床有限公司 | Hydraulic pre-tensioning device |
| CN101823114A (en) * | 2010-04-09 | 2010-09-08 | 太原重工股份有限公司 | Double-post inclined type multi-pull-rod prestress machine frame of free forging hydrostatic press |
| CN202239427U (en) * | 2011-09-20 | 2012-05-30 | 天津市天锻压力机有限公司 | Large-tonnage hydraulic press multi-pull-rod pre-tightening device |
| CN203401755U (en) * | 2013-08-20 | 2014-01-22 | 沃得精机(中国)有限公司 | Hydraulic tensioning device of pull rods of press machine |
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|---|---|
| CN103448288B (en) | 2015-09-02 |
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Granted publication date: 20150902 Termination date: 20160820 |