CN102494227A - Large-tonnage combined type adjustable prestress framework - Google Patents
Large-tonnage combined type adjustable prestress framework Download PDFInfo
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- CN102494227A CN102494227A CN2011104174812A CN201110417481A CN102494227A CN 102494227 A CN102494227 A CN 102494227A CN 2011104174812 A CN2011104174812 A CN 2011104174812A CN 201110417481 A CN201110417481 A CN 201110417481A CN 102494227 A CN102494227 A CN 102494227A
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Abstract
The invention discloses a large-tonnage combined type adjustable prestress framework, which comprises an upper framework, a lower framework, a prestress draw bar component and a prestress adjusting mechanism. The upper framework comprises a top beam and an upper crossbeam arranged on the top beam; the lower framework comprises a lower crossbeam and a bottom beam disposed on the lower crossbeam; the prestress draw bar component comprises prestress drawbars, press keys and wedge-shaped press blocks, the upper framework and the lower framework are connected via the prestress draw bars, the press keys radially penetrate through the upper ends of the prestress draw bars, and the wedge-shaped press blocks are located under the press keys; and the prestress adjusting mechanism comprises a turbine, a worm, a lead screw, a wedge-shaped slider matching with the wedge-shaped press blocks, and a track seat. A weak threaded structure is omitted, fussy thread screwing operation during installation is avoided, simultaneous loading of prestress of all the draw bars is realized, and equipment mounting efficiency is improved; by the aid of structural characteristics of the wedge-shaped press blocks, large draw bar prestress can be generated by small adjusting force, and mounting difficulty is effectively reduced; and a combined structure is adopted, the components of the prestress framework can be manufactured separately, and manufacturing cost is reduced.
Description
Technical field
The present invention relates to mechanical field, the adjustable prestressed stand of particularly a kind of combined type of large-tonnage machinery.
Background technique
Key equipment in the metal-processing industries such as large-tonnage stretcher and rolling mill because of when work the body internal memory in bigger working stress; Therefore this kind equipment frame must have higher strength and stiffness; Can provide bigger prestressing force to offset work body running on opportunity stress, keep the assembly relation between each part of complete sum of internal structure.
When little tonnage, this kind equipment generally all adopts the integral type rack construction that is made up of single integral casting forging piece.But along with the increase of tonnage, the volume of frame, weight also increase thereupon, have caused big difficulty for each link such as manufacturing, processing, transportation, installation, even on engineering, can't realize, have therefore produced the combined frame structure.
Combined frame mainly is the improvement of unit frame aspect manufacturing process, through being decomposed into the part that a plurality of volumes are less relatively, be convenient to Project Realization to the bigger whole frame of volume, to reduce the difficulty of links such as manufacturing, processing, transportation.But in order to ensure its strength and stiffness, combined frame still exists overall volume excessive, the problem that weight is heavier.Fail fundamentally to solve the problem of unit frame.
Therefore, in order fundamentally to reduce the frame volume and weight, and enough intensity, rigidity can be provided still, occur combination type prestressed rack construction again.It has adopted the design philosophy of combined frame; Be that frame is formed by several unit constructions of being convenient to Project Realization; But adopted prestressing mechanism to connect again simultaneously, effectively raised the strength and stiffness of frame, the feasible overall dimensions and the weight that can reduce frame.
But present combination type prestressed frame all is to adopt bolt, nut to apply mode, promptly through the nut loading prestressing force of screwing, and some problems below this load mode exists:
(1) because the load of device assumes is big, need be equipped with bigger pretightening force and comes from work body running on opportunity stress with opposing.Although on engineering, all adopt a plurality of large-scale bolt connection modes, bolt should bear pretightening force, bears working load again, and it is big that bolt bears load, causes the bolt size big, further strengthens the size of frame again.
(2) adopt a plurality of large-scale bolt connection modes; Also just need during installation respectively every bolt to be loaded pretightening force separately, and the difficulty of screwing of large scale nut, bigger bolt pretightening need be produced again; Must screw complex installation process, slow by specialized apparatus.
(3) balanced many bolt pretightenings are very difficult.Because of bolt pretightening is very big, cause the local generation of frame resiliently deformable, and then influence other bolt stress, therefore need distribute according to rack construction and bolt, finely tune each bolt internal stress in certain sequence gradually, very labor intensive and time.
(4) in actual use, because of factors such as stressed, vibration, temperature variation, the pretightening force in the pull bar can change, and need often adjust timely, and adopts the firmly beforehand means of bolt and nut can't reach this requirement.
(5) because of screw rod will bear big load, make worm structure very easily be out of shape, damage, not only be difficult to dismounting, and make expensive bolt become easily damaged parts.
(6) corresponding, above problem has also increased maintenance, the repairing difficulty of equipment, significantly reduces the equipment utilization efficiency, has increased user cost.
To above-mentioned deficiency, pressing at present a kind ofly can provide high rigidity and pretightening force, the feasible rack construction of engineering, and can realize the loading of pretightening force and adjustment in time easily, reduce significantly make, loading and unloading difficulty and time.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of large-tonnage assembled adjustable prestressed stand, high rigidity and pretightening force not only can be provided, avoid screw thread time-consuming in the installation process work of screwing, improved the equipment installation efficiency; Can realize the loading of pretightening force and adjustment in time easily, and reduce the difficulty of installation and removal greatly, reduce manufacture cost.
The objective of the invention is to realize through following technological scheme: a kind of large-tonnage assembled adjustable prestressed stand, comprise upper spider, lower bearing bracket and prestressed draw-bar parts, said upper spider comprises back timber and is arranged on the upper beam on the back timber; Lower bearing bracket comprises bottom end rail and is arranged on the bottom girder on the bottom end rail; The prestressed draw-bar parts comprise and are used to connect the prestressed draw-bar of upper and lower frame, radially pass the pressure key of prestressed draw-bar upper end and be positioned at the wedge shape briquetting of pressing under the key; Also comprise and be arranged on the wedge block that cooperates with its wedge surface under the wedge shape briquetting.
Further, also comprise the prestressing force regulating mechanism that is used to drive wedge block, said prestressing force regulating mechanism comprises the screw mandrel that the two ends hand of spiral is opposite, and the tapped hole that matches with screw mandrel is set on the correcting wedge; Also comprise and be used to drive the driving mechanism that screw mandrel rotates;
Further, said driving mechanism comprises turbine and the scroll bar that cooperatively interacts, and screw mandrel cooperates with turbine rotation;
Further, between said upper beam and the correcting wedge slide track seat is set;
Further, the gland that is provided with between the said upper and lower frame;
Further, correcting wedge, wedge shape briquetting and slide track seat all adopt integral structure, are inserted in one-sided all prestressed draw-bars simultaneously;
Further, prestressed draw-bar is pressed fixing one-sided all prestressed draw-bars of key by pressing key and wedge shape briquetting to fix by one.
Beneficial effect of the present invention: large-tonnage assembled adjustable prestressed stand of the present invention; Upper and lower by many prestressed draw-bars connections that are positioned at both sides; Prestressed draw-bar is fixed by integral type wedge shape briquetting and a pressure key that runs through each pull bar top, has avoided fragile worm structure Placement; The prestressing force of prestressed draw-bar is not through pressing key and briquetting to produce; But accomplish by the wedge block and the acting in conjunction of wedge shape briquetting that driven by external force; Avoid in the installation process work of screwing of loaded down with trivial details screw thread, loaded when having realized all pull bar pretightening forces, improved the equipment installation efficiency; And the structural feature of wedge-shaped blocks has determined to use less adjusting power to produce bigger pull bar pretightening force, has effectively reduced installation difficulty; And the employing fabricated structure, can separately make, reduce manufacture cost.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the plan view of the specific embodiment of the invention;
Fig. 3 is a prestressing force regulating mechanism one-sided configuration schematic representation of the present invention.
Embodiment
Fig. 1 is a structural representation of the present invention; Fig. 2 is the plan view of the specific embodiment of the invention, and Fig. 3 is a prestressing force regulating mechanism one-sided configuration schematic representation of the present invention.As shown in the figure: the large-tonnage assembled adjustable prestressed stand of present embodiment, comprise upper spider, lower bearing bracket and prestressed draw-bar parts, said upper spider comprises back timber 1 and is arranged on the upper beam 2 on the back timber; Lower bearing bracket comprises bottom end rail 3 and is arranged on the bottom girder 4 on the bottom end rail; The prestressed draw-bar parts comprise and are used to connect the prestressed draw-bar 5 of upper and lower frame, radially pass the pressure key 8 of prestressed draw-bar upper end and be positioned at the wedge shape briquetting 9 of pressing under the key; Also comprise and be arranged on the wedge block 6 that cooperates with its wedge surface under the wedge shape briquetting.
During use, large-tonnage assembled adjustable prestressed stand is according to illustrated in figures 1 and 2 assembling, and the initial position of assurance both sides wedge block is symmetrical with respect to the frame median surface, and makes the both sides prestressed draw-bar be in zero pre-stressed state.See 2 antimeric planes about the frame median surface refers to and is divided into frame by Fig. 1.When loading pull bar prestressing force, drive wedge block simultaneously to the left and right through external force, from but prestressed draw-bar produces prestressing force, the stationary wedge slide block can be accomplished prestressing force and loads when prestressing force reaches dbjective state.This structure and load mode have been avoided fragile worm structure Placement; The prestressing force of prestressed draw-bar is not through pressing key and briquetting to produce; But accomplish by the wedge block and the acting in conjunction of wedge shape briquetting that driven by external force; Avoid in the installation process work of screwing of loaded down with trivial details screw thread, loaded when having realized all pull bar pretightening forces, improved the equipment installation efficiency; And the structural feature of wedge-shaped blocks has determined to use less adjusting power to produce bigger pull bar pretightening force, has effectively reduced installation difficulty; And the employing fabricated structure, can separately make, reduce manufacture cost.
As further improvement to the foregoing description, also comprise the prestressing force regulating mechanism that is used to drive wedge block 6, said prestressing force regulating mechanism comprises the opposite screw mandrel of two ends hand of spiral 10, and the tapped hole that matches with screw mandrel 10 is set on the correcting wedge 6; Also comprise and be used to drive the driving mechanism that screw mandrel rotates.Driving mechanism comprises the turbine 11 and scroll bar 12 that cooperatively interacts in the present embodiment, and screw mandrel 10 is rotatably assorted with turbine 11.The prestressing force regulating mechanism adopts turbine and worm to drive screw mandrel; The screw mandrel two ends are designed with the opposite screw thread of rotation direction; Drive the translation in the horizontal direction of both sides wedge block; Accomplish prestressed loading in all pull bars of both sides simultaneously, and can in time adjust, effectively raise the efficient of prestressing force load balance according to prestressed variation.Simultaneously, adopt the turbine and worm mechanism driving, can use less driving force to realize more high-prestressed loading, and utilized the latching characteristics of wire rod thread, turbine and worm mechanism again, keep load prestressed constant.
As further improvement, between said upper beam 2 and the correcting wedge 6 slide track seat 13 is set to the foregoing description.Slide track seat is set reduces friction, reduce the mobile difficulty of wedge block, adopt less power can accomplish moving of wedge block, realize easily.
As further improvement to the foregoing description, the gland 7 that is provided with between the said upper and lower frame.When gland being set satisfying bracket height and require, can produce certain working space, the convenient installation and operation.
As the further improvement to the foregoing description, correcting wedge 6, wedge shape briquetting 9 and slide track seat 13 all adopt integral structure, are inserted in one-sided all prestressed draw-bars simultaneously.The design of employing integral structure can guarantee the global stability when wedge shape briquetting and wedge block interact, and is stressed even, reduces driving mechanism, practices thrift cost and controls difficulty with reducing.
As the further improvement to the foregoing description, prestressed draw-bar 5 is pressed fixing one-sided all prestressed draw-bars of key by pressing key 8 fixing with wedge shape briquetting 9 by one.Adopt one to press fixing one-sided all prestressed draw-bars of key, installation and removal are simple, increase work efficiency greatly.
Explanation is at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technological scheme of the present invention; And not breaking away from the aim and the scope of technological scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. large-tonnage assembled adjustable prestressed stand, it is characterized in that: comprise upper spider, lower bearing bracket and prestressed draw-bar parts, said upper spider comprises back timber (1) and is arranged on the upper beam (2) on the back timber; Lower bearing bracket comprises bottom end rail (3) and is arranged on the bottom girder (4) on the bottom end rail; The prestressed draw-bar parts comprise the prestressed draw-bar (5) that is used to connect upper and lower frame, radially pass the pressure key (8) and the wedge shape briquetting (9) that is positioned under the pressure key of prestressed draw-bar upper end; Also comprise and be arranged on the wedge block (6) that cooperates with its wedge surface under the wedge shape briquetting.
2. large-tonnage assembled adjustable prestressed stand according to claim 1; It is characterized in that: also comprise the prestressing force regulating mechanism that is used to drive wedge block (6); Said prestressing force regulating mechanism comprises the opposite screw mandrel of two ends hand of spiral (10), and correcting wedge (6) is gone up the tapped hole that matches with screw mandrel (10) is set; Also comprise and be used to drive the driving mechanism that screw mandrel rotates.
3. large-tonnage assembled adjustable prestressed stand according to claim 2 is characterized in that: said driving mechanism comprises turbine (11) and the scroll bar (12) that cooperatively interacts, and screw mandrel (10) is rotatably assorted with turbine (11).
4. according to claim 1,2 or 3 described large-tonnage assembled adjustable prestressed stands, it is characterized in that: between said upper beam (2) and the correcting wedge (6) slide track seat (13) is set.
5. large-tonnage assembled adjustable prestressed stand according to claim 4 is characterized in that: the gland (7) that is provided with between the said upper and lower frame.
6. large-tonnage assembled adjustable prestressed stand according to claim 5 is characterized in that: gland (7), correcting wedge (6), wedge shape briquetting (9) and slide track seat (13) all adopt integral structure, are inserted in one-sided all prestressed draw-bars simultaneously.
7. large-tonnage assembled adjustable prestressed stand according to claim 6 is characterized in that: prestressed draw-bar (5) is pressed fixing one-sided all prestressed draw-bars of key by pressing key (8) and wedge shape briquetting (9) fixing by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104174812A CN102494227A (en) | 2011-12-14 | 2011-12-14 | Large-tonnage combined type adjustable prestress framework |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104174812A CN102494227A (en) | 2011-12-14 | 2011-12-14 | Large-tonnage combined type adjustable prestress framework |
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| CN102494227A true CN102494227A (en) | 2012-06-13 |
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| CN2011104174812A Pending CN102494227A (en) | 2011-12-14 | 2011-12-14 | Large-tonnage combined type adjustable prestress framework |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475509A (en) * | 2016-12-05 | 2017-03-08 | 重集团大连设计研究院有限公司 | A kind of large-scale combined hydraulic press frame structure for being capable of constantly pretension |
| CN109838554A (en) * | 2019-04-01 | 2019-06-04 | 济南大学 | A kind of variable prestressing force tube structure of hoop type |
| CN117960943A (en) * | 2024-04-01 | 2024-05-03 | 中国重型机械研究院股份公司 | Central rod piece for ring piece bulging device with prestress and use method |
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| US3253447A (en) * | 1962-03-08 | 1966-05-31 | Morgardshammars Mek Verkst Sa | Freely adjustable roll mounting |
| GB1384344A (en) * | 1972-05-12 | 1975-02-19 | Dea Spa | Structure for mounting measuring machines and machine tools |
| US5664757A (en) * | 1993-09-29 | 1997-09-09 | Abb Patent Gmbh | Stand for receiving machines and equipment |
| CN101722186A (en) * | 2009-11-25 | 2010-06-09 | 宁波大学 | Self-potential roller-type cross wedge rolling mill |
| 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 |
| CN201815616U (en) * | 2010-03-16 | 2011-05-04 | 沈阳重机重矿机械设备制造有限公司 | Forging press with pre-stressed frame structure |
| CN102042460A (en) * | 2009-10-19 | 2011-05-04 | 西安贝吉姆机床股份有限公司 | Adjustable sizing block |
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2011
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Patent Citations (7)
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| US3253447A (en) * | 1962-03-08 | 1966-05-31 | Morgardshammars Mek Verkst Sa | Freely adjustable roll mounting |
| GB1384344A (en) * | 1972-05-12 | 1975-02-19 | Dea Spa | Structure for mounting measuring machines and machine tools |
| US5664757A (en) * | 1993-09-29 | 1997-09-09 | Abb Patent Gmbh | Stand for receiving machines and equipment |
| CN102042460A (en) * | 2009-10-19 | 2011-05-04 | 西安贝吉姆机床股份有限公司 | Adjustable sizing block |
| CN101722186A (en) * | 2009-11-25 | 2010-06-09 | 宁波大学 | Self-potential roller-type cross wedge rolling mill |
| CN201815616U (en) * | 2010-03-16 | 2011-05-04 | 沈阳重机重矿机械设备制造有限公司 | Forging press with pre-stressed frame structure |
| 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 |
Non-Patent Citations (1)
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| 段志东 等: "组合机架的刚度分析和拉杆预紧力研究", 《机械科学与技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475509A (en) * | 2016-12-05 | 2017-03-08 | 重集团大连设计研究院有限公司 | A kind of large-scale combined hydraulic press frame structure for being capable of constantly pretension |
| CN109838554A (en) * | 2019-04-01 | 2019-06-04 | 济南大学 | A kind of variable prestressing force tube structure of hoop type |
| CN117960943A (en) * | 2024-04-01 | 2024-05-03 | 中国重型机械研究院股份公司 | Central rod piece for ring piece bulging device with prestress and use method |
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Application publication date: 20120613 |