CN102853808A - Uniformly-distributed load generating device - Google Patents
Uniformly-distributed load generating device Download PDFInfo
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- CN102853808A CN102853808A CN2012103002974A CN201210300297A CN102853808A CN 102853808 A CN102853808 A CN 102853808A CN 2012103002974 A CN2012103002974 A CN 2012103002974A CN 201210300297 A CN201210300297 A CN 201210300297A CN 102853808 A CN102853808 A CN 102853808A
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Abstract
The invention discloses a uniformly-distributed load generating device, which comprises an oil cylinder integrated board and a hydraulic control system, wherein the oil cylinder integrated board comprises a plurality of oil cylinders arranged in lines or columns; and for the oil cylinders in each line or each column, the extension and contraction of oil cylinder piston rods are controlled synchronously by using the same hydraulic control system. The uniformly-distributed load generating device has the advantages that: the oil cylinder integrated board consists of the oil cylinders in multiple columns and multiple lines, so that a corresponding force applying region of each oil cylinder is very small, the uniformity of load distribution is realized approximately, the magnitude of the uniformly-distributed load is adjustable, and the force applying region is controllable.
Description
Technical field
The present invention relates to a kind of uniformly distributed load generating means, especially a kind ofly be applied in that straight side press carries out that static deflection is measured and the uniformly distributed load generating means of ability origination point when measuring.
Background technology
The precision of pressing machine represents with its static accuracy and rigidity usually, and the precision of pressing machine and rigidity have very large impact to the quality of die life and stamping parts.And along with the develop rapidly of modern stamping technology, all kinds of high-speed fine press that different size, different structure, different types have in succession occurred, to satisfy the specific (special) requirements of different product punching, therefore for guaranteeing overall performance and all technical of pressing machine, how correctly, scientifically the static deflection of measuring pressing machine seems particularly important.
No matter existing straight side press standard is single-point, two point or four point pressure machines when carrying out the static deflection measurement, and its loading force provides by hydraulic pressure loading device (lifting jack).Be subjected to the restriction of hydraulic pressure loading device physical dimension, the quantity of configuration is very limited simultaneously on the press bench face for hydraulic pressure loading device during loading, and different depending on press tonnage and work top size are generally 4～8.Because load(ing) point is on the low side, the distribution of its actual loaded load is inhomogeneous in fact, and desired uniformly distributed load has larger gap during with measurement, directly has influence on the precision of measurement and the accuracy of measurement data.
Slide block was apart from the distance of bottom dead centre when the ability origination point referred to that pressing machine reaches nominal pressure, and it is an important indicator of pressing machine, but owing to lack load generating means near the load actual conditions, so this index can't Measurement accuracy.
Summary of the invention
Technical matters to be solved by this invention is to overcome the defects of prior art and propose a kind of uniformly distributed load generating means, and the reality in the time of can more meeting the pressing machine test improves the accuracy of measuring.
The present invention solves the problems of the technologies described above the technical scheme that adopts:
A kind of uniformly distributed load generating means, it is characterized in that: comprise oil cylinder circuit board, hydraulic control system, described oil cylinder circuit board comprises by row or by being listed as a plurality of oil cylinders of arranging, the oil cylinder of every row or every row is flexible by same hydraulic control system synchro control cylinder piston rod.
Mediant row on the above-mentioned oil cylinder circuit board or ordered series of numbers oil cylinder are flexible by same hydraulic control system control synchro control cylinder piston rod, the oil cylinder of all the other every row or every row is flexible by other hydraulic control system synchro control cylinder piston rod, can reduce like this quantity of hydraulic control system.
Above-mentioned hydraulic control system comprises hydraulic system and operation valve, and the rod chamber of each oil cylinder of each column or row is communicated with, and the rodless cavity of each oil cylinder of each column or row also is communicated with, and is controlled the turnover of liquid by operation valve, controls like this oil cylinder more convenient.
Above-mentioned cylinder block is the oil cylinder circuit board, and the rod chamber of each oil cylinder of each column or row is communicated with, and the rodless cavity of each oil cylinder of each column or row also is communicated with, and is controlled the turnover of liquid by operation valve, and this spline structure is compacter, can also save material.
The rod chamber of above-mentioned every row oil cylinder communicates by pipeline, and the rodless cavity of every row oil cylinder communicates by pipeline, is convenient to control the permutation oil cylinder.
Contiguous block is installed in an above-mentioned side of stating the oil cylinder circuit board, and hydraulic control system is arranged on the described contiguous block, convenient operation and the action of observing oil cylinder directly perceived.
Above-mentioned contiguous block is divided into the first contiguous block, the second contiguous block and the 3rd contiguous block, the centre is the second contiguous block, the first contiguous block and the 3rd contiguous block are installed with respect to oil cylinder circuit board Central Symmetry, and the hydraulic control system of every like this row oil cylinder and correspondence is consistent, simple to operate, directly perceived.
Above-mentioned hydraulic system also comprises two accumulators, is used for keeping on-load pressure basicly stable.
The pressure of above-mentioned hydraulic control system is adjustable, so the pressure of the oil cylinder of its control also can regulate, thereby reaches the size of regulating load.
Compared with prior art, the invention has the advantages that:
(1) because the oil cylinder circuit board is made of multiple row multirow oil cylinder, so the corresponding application of force of each oil cylinder zone is very little, is similar to the homogeneity that realizes that load distributes.
(2) the uniformly distributed load size is adjustable, and application of force zone is controlled, can satisfy the different pressures machine for the requirement in magnitude of load and application of force zone.
Description of drawings
Fig. 1 is embodiment of the invention oil cylinder circuit board stereographic map.
Fig. 2 is embodiment of the invention oil cylinder circuit board stereographic map.
Fig. 3 is the stereographic map of embodiment of the invention hydraulic system.
Fig. 4 is the structural representation of embodiment of the invention uniformly distributed load generating means when being used for the measurement capability origination point.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of uniformly distributed load generating means, it comprises an oil cylinder circuit board 1, contains the hydraulic control system 6 of all kinds of operation valves.
Above-mentioned oil cylinder circuit board 1 is provided with the left, center, right Three regions, and described left, center, right Three regions comprises respectively the oil cylinder of arranging by the multiple row multirow.
Described hydraulic control system 6 comprises the first operation valve 7 and a plurality of the second operation valve 4, stretching of the piston rod 2 of the ordered series of numbers oil cylinder of the first operation valve 7 control oil cylinder circuit boards 1 zone line by rows, a plurality of the second operation valves 4 are controlled respectively piston rod 2 flexible of the every row oil cylinder of oil cylinder circuit board 1 left and right regions, and each second operation valve 4 is control one row oil cylinders separately.
Above-mentioned cylinder block is exactly that oil cylinder circuit board 1 is own, and the epicoele of every row oil cylinder communicates by pipeline, and the cavity of resorption of every row oil cylinder communicates by pipeline.
The first contiguous block 3, the second contiguous block 5 and the 3rd contiguous block 8 are installed in above-mentioned oil cylinder circuit board 1 one sides, and described the first contiguous block 3 and the 3rd contiguous block 8 are installed with respect to oil cylinder circuit board 1 Central Symmetry.
Above-mentioned the first operation valve 7 is connected with oil cylinder circuit board 1 by the second contiguous block 5, and then the oil-feed of control oil cylinder circuit board 1 zone line cylinder upper cavity oil and cavity of resorption.
Several second operation valves 4 are installed on above-mentioned the first contiguous block 3 and the 3rd contiguous block 8, described the second operation valve 4 is connected by the first contiguous block 3 and the 3rd contiguous block 8 and oil cylinder circuit board 1, and then controls the oil-feed of oil cylinder circuit board 1 left and right regions cylinder upper cavity oil and cavity of resorption.
The system pressure of above-mentioned hydraulic system 6 can be regulated as required, and the oil cylinder working-pressure that therefore links to each other with hydraulic system 6 also can be regulated, so the size of uniformly distributed load also is controlled and can regulates.
Above-mentioned hydraulic system 6 also comprises two accumulators 9 and 10, reduces when detecting on-load pressure, and accumulator receives signal will carry out ftercompction automatically, to keep the continual and steady of on-load pressure.
In the present embodiment the present invention is applied on the straight side press, because press tonnage and die size size is different, the size of required uniformly distributed load is also different with application of force zone.The length of oil cylinder circuit board zone line can be set by the required application of force zone of minimum tonnage, only needs this moment operation valve 7 actions just passable, and oil cylinder circuit board zone line produces uniformly distributed load.
If changing application of force zone, tonnage needs to strengthen, operation valve 7 and symmetrical pair of control valve 4 ' simultaneously action, application of force zone needs to strengthen again, so just increase again pair of control valve 4 " action; being that application of force zone is strengthened, only needing to increase the quantity of operation valve 4 actions, is that all operation valves 4 and operation valve 7 move simultaneously such as Fig. 1; cylinder piston rod 2 stretches out, the state when producing uniformly distributed load; Fig. 2 is that cylinder piston rod 2 is retracted the state when laying down uniformly distributed load.
When the measurement capability origination point, suppose when distance bottom dead centre h, to reach the pressing machine nominal pressure, the uniformly distributed load size that the uniformly distributed load generating means produces is the pressing machine nominal pressure, utilize accumulator to keep uniformly distributed load constant, as shown in Figure 4, dotted line is lower dead point position among the figure, slide block 11 lower plane present positions are pressing machine ability origination point, arriving the bottom dead centre distance is h, cylinder piston rod 2 stretches out and withstands slide block 11 lower planes, when slide block continues to the close arrival of bottom dead centre bottom dead centre, if the distance that piston rod 2 descends is less than h, illustrate that this pressing machine does not reach nominal pressure at ability origination point h place, if the distance that piston rod 2 descends equals h, illustrate that this pressing machine can reach nominal pressure at ability origination point h place.
Claims (8)
1. uniformly distributed load generating means, it is characterized in that: comprise oil cylinder circuit board, hydraulic control system, described oil cylinder circuit board comprises by row or by being listed as a plurality of oil cylinders of arranging, the oil cylinder of every row or every row is flexible by same hydraulic control system synchro control cylinder piston rod.
2. uniformly distributed load generating means as claimed in claim 1, it is characterized in that: the mediant row on the described oil cylinder circuit board or ordered series of numbers oil cylinder are flexible by same hydraulic control system control synchro control cylinder piston rod, and the oil cylinder of all the other every row or every row is flexible by other hydraulic control system synchro control cylinder piston rod.
3. uniformly distributed load generating means as claimed in claim 1, it is characterized in that: described hydraulic control system comprises hydraulic system and operation valve, the rod chamber of each oil cylinder of each column or row is communicated with, the rodless cavity of each oil cylinder of each column or row also is communicated with, and is controlled the turnover of liquid by operation valve.
4. uniformly distributed load generating means as claimed in claim 1, it is characterized in that: described cylinder block is the oil cylinder circuit board, the rod chamber of each oil cylinder of each column or row is communicated with, and the rodless cavity of each oil cylinder of each column or row also is communicated with, and is controlled the turnover of liquid by operation valve.
5. uniformly distributed load generating means as claimed in claim 4, it is characterized in that: the rod chamber of every row oil cylinder communicates by pipeline, and the cavity of resorption of every row oil cylinder communicates by pipeline.
6. such as claim 1,2 or 3 described uniformly distributed load generating meanss, it is characterized in that: contiguous block is installed in a side of described oil cylinder circuit board, and hydraulic control system is arranged on the described contiguous block.
7. uniformly distributed load generating means as claimed in claim 5, it is characterized in that: described contiguous block is divided into the first contiguous block, the second contiguous block and the 3rd contiguous block, the centre is the second contiguous block, and the first contiguous block and the 3rd contiguous block are installed with respect to oil cylinder circuit board Central Symmetry.
8. uniformly distributed load generating means as claimed in claim 1, it is characterized in that: described hydraulic control system also comprises to keep the basicly stable accumulator of on-load pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210300297.4A CN102853808B (en) | 2012-08-22 | 2012-08-22 | Uniformly-distributed load generating device |
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| CN201210300297.4A CN102853808B (en) | 2012-08-22 | 2012-08-22 | Uniformly-distributed load generating device |
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| CN102853808A true CN102853808A (en) | 2013-01-02 |
| CN102853808B CN102853808B (en) | 2015-06-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226082A (en) * | 2013-04-15 | 2013-07-31 | 河海大学 | Test device simulating horizontal uniform load and test method |
| CN104454718A (en) * | 2014-11-07 | 2015-03-25 | 秦皇岛瑞晶太阳能科技有限公司 | Hydraulic system of BIPV solar module positive-pressure packaging device |
| CN107132124A (en) * | 2017-05-16 | 2017-09-05 | 宁波市交通建设工程试验检测中心有限公司 | A kind of pressure testing machine loading device |
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| FR2312022A2 (en) * | 1975-05-23 | 1976-12-17 | Lagneau Jean | Weighing device with several compression pots - has each communicating with small cylinder whose piston rods are linked mechanically |
| RU2300650C1 (en) * | 2006-01-31 | 2007-06-10 | Владимир Степанович Григорчук | Diesel engine |
| CN200948478Y (en) * | 2006-06-16 | 2007-09-19 | 重庆工学院 | Plate mold-free forming device |
| CN101704493A (en) * | 2009-10-10 | 2010-05-12 | 太仓高德升降机有限公司 | Multi-cylinder synchronous lifting platform |
| CN202903171U (en) * | 2012-08-22 | 2013-04-24 | 宁波精达成形装备股份有限公司 | Uniform distribution load generating device |
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2012
- 2012-08-22 CN CN201210300297.4A patent/CN102853808B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2312022A2 (en) * | 1975-05-23 | 1976-12-17 | Lagneau Jean | Weighing device with several compression pots - has each communicating with small cylinder whose piston rods are linked mechanically |
| RU2300650C1 (en) * | 2006-01-31 | 2007-06-10 | Владимир Степанович Григорчук | Diesel engine |
| CN200948478Y (en) * | 2006-06-16 | 2007-09-19 | 重庆工学院 | Plate mold-free forming device |
| CN101704493A (en) * | 2009-10-10 | 2010-05-12 | 太仓高德升降机有限公司 | Multi-cylinder synchronous lifting platform |
| CN202903171U (en) * | 2012-08-22 | 2013-04-24 | 宁波精达成形装备股份有限公司 | Uniform distribution load generating device |
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| 刘茜等: "框式油压机机身的有限元分析和优化设计", 《机械》, vol. 31, no. 4, 30 April 2004 (2004-04-30) * |
| 王汉鹏等: "模型试验柔性均布压力加载系统研制及其应用", 《岩土力学》, vol. 33, no. 7, 31 July 2012 (2012-07-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226082A (en) * | 2013-04-15 | 2013-07-31 | 河海大学 | Test device simulating horizontal uniform load and test method |
| CN103226082B (en) * | 2013-04-15 | 2015-09-30 | 河海大学 | A kind of test unit of dummy level evenly load and test method |
| CN104454718A (en) * | 2014-11-07 | 2015-03-25 | 秦皇岛瑞晶太阳能科技有限公司 | Hydraulic system of BIPV solar module positive-pressure packaging device |
| CN107132124A (en) * | 2017-05-16 | 2017-09-05 | 宁波市交通建设工程试验检测中心有限公司 | A kind of pressure testing machine loading device |
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| CN102853808B (en) | 2015-06-17 |
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