CN102853808B - Uniformly-distributed load generating device - Google Patents
Uniformly-distributed load generating device Download PDFInfo
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- CN102853808B CN102853808B CN201210300297.4A CN201210300297A CN102853808B CN 102853808 B CN102853808 B CN 102853808B CN 201210300297 A CN201210300297 A CN 201210300297A CN 102853808 B CN102853808 B CN 102853808B
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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 of uniformly distributed load generating means being applied in straight side press and carrying out when static deflection measurement and ability origination point are measured.
Background technology
The precision of pressing machine represents with its static accuracy and rigidity usually, and the precision of pressing machine and the quality of rigidity on die life and stamping parts have very large impact.And along with the develop rapidly of modern stamping technology, all kinds of high-speed fine press of different size, different structure, different types are in succession there are, to meet the particular/special requirement of different product punching, therefore for ensureing the overall performance of pressing machine and all technical, how correctly, the static deflection that scientifically measures pressing machine seems particularly important.
Existing straight side press standard is when carrying out static deflection and measuring, and no matter be single-point, two point or four point pressure machines, its loading force provides by hydraulic pressure loading device (lifting jack).By the restriction of hydraulic pressure loading device physical dimension, the quantity that during loading, hydraulic pressure loading device configures on press bench face is simultaneously very limited, depending on the difference of press tonnage and work top size, is generally 4 ~ 8.Because load(ing) point is on the low side, the distribution of its actual loaded load is uneven in fact, has larger gap, directly have influence on the precision of measurement and the accuracy of measurement data with uniformly distributed load required when measuring.
The distance of slide block distance bottom dead centre when ability origination point refers to that pressing machine reaches nominal pressure, it is an important indicator of pressing machine, but owing to lacking the load generating means close to load actual conditions, so this index cannot Measurement accuracy.
Summary of the invention
Technical matters to be solved by this invention be overcome prior art above-mentioned defect and a kind of uniformly distributed load generating means is proposed, can more meet pressing machine test time reality, improve measure accuracy.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of uniformly distributed load generating means, it is characterized in that: comprise oil cylinder circuit board, hydraulic control system, multiple oil cylinders that described oil cylinder circuit board comprises by row or arranges by row, oil cylinder the stretching by same hydraulic control system synchro control cylinder piston rod of often going or often arranging.
Mediant row on above-mentioned oil cylinder circuit board or ordered series of numbers oil cylinder control the flexible of cylinder piston rod by same hydraulic control system control synchronization, all the other oil cylinder stretching by other hydraulic control system synchro control cylinder piston rod of often going or often arranging, can reduce the quantity of hydraulic control system like this.
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 is also communicated with, and controls the turnover of liquid by operation valve, controls oil cylinder so more convenient.
Above-mentioned cylinder block is 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 is also communicated with, and controls the turnover of liquid by operation valve, and this spline structure is compacter, can also save material.
The rod chamber of above-mentioned often row oil cylinder is communicated by pipeline, and often the rodless cavity of row oil cylinder is communicated by pipeline, is convenient to control permutation oil cylinder.
Contiguous block is installed in the above-mentioned side stating oil cylinder circuit board, and hydraulic control system is arranged on described contiguous block, the action of convenient operation and direct vision oil cylinder.
Above-mentioned contiguous block is divided into the first contiguous block, the second contiguous block and the 3rd contiguous block, centre is the second contiguous block, first contiguous block and the 3rd contiguous block are installed relative to oil cylinder circuit board Central Symmetry, and so often the hydraulic control system of row oil cylinder and correspondence is consistent, simple to operate, directly perceived.
Above-mentioned hydraulic system also comprises two accumulators, is used for maintaining on-load pressure basicly stable.
The pressure adjustable of above-mentioned hydraulic control system, therefore the pressure of its oil cylinder controlled also can regulate, thus reaches the size regulating load.
Compared with prior art, the invention has the advantages that:
(1) because oil cylinder circuit board is made up of multiple row multirow oil cylinder, so each oil cylinder correspondence force region is very little, the approximate homogeneity realizing load diatibution.
(2) uniformly distributed load size is adjustable, and force region is controlled, can meet different pressures machine for the requirement of magnitude of load with force region.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention oil cylinder circuit board stereographic map.
Fig. 2 is embodiment of the present invention oil cylinder circuit board stereographic map.
Fig. 3 is the stereographic map of embodiment of the present invention hydraulic system.
Fig. 4 is that embodiment of the present invention uniformly distributed load generating means is for structural representation during measurement capability origination point.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Figure 1, a kind of uniformly distributed load generating means, it comprises an oil cylinder circuit board 1, hydraulic control system 6 containing all kinds of operation valve.
Above-mentioned oil cylinder circuit board 1 is provided with region, three, left, center, right, and region, three, described left, center, right comprises the oil cylinder by multiple row plurality of rows respectively.
Described hydraulic control system 6 comprises the first operation valve 7 and multiple second operation valve 4, first operation valve 7 controls the flexible of the piston rod 2 of the ordered series of numbers oil cylinder of oil cylinder circuit board 1 zone line by rows, multiple second operation valve 4 controls piston rod 2 flexible of the every row oil cylinder of oil cylinder circuit board 1 left and right regions respectively, and each second operation valve 4 controls a row oil cylinder separately.
Above-mentioned cylinder block is exactly oil cylinder circuit board 1 itself, and often the epicoele of row oil cylinder is communicated by pipeline, and often the cavity of resorption of row oil cylinder is communicated by pipeline.
The first contiguous block 3, second contiguous block 5 and the 3rd contiguous block 8 are installed in above-mentioned oil cylinder circuit board 1 one side, and the first described contiguous block 3 and the 3rd contiguous block 8 are installed relative to oil cylinder circuit board 1 Central Symmetry.
Above-mentioned first operation valve 7 is connected with oil cylinder circuit board 1 by the second contiguous block 5, and then controls the oil-feed of oil cylinder circuit board 1 zone line cylinder upper cavity oil and cavity of resorption.
Above-mentioned first contiguous block 3 and the 3rd contiguous block 8 install several second operation valve 4, the second described operation valve 4 passes through the connection of 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 regulate as required, and the oil cylinder working-pressure be therefore connected with hydraulic system 6 also can regulate, and therefore the size of uniformly distributed load is also controlled and can regulates.
Above-mentioned hydraulic system 6 also comprises two accumulators 9 and 10, and when detecting that on-load pressure reduces, accumulator receives signal will carry out ftercompction automatically, to maintain the continual and steady of on-load pressure.
Be applied on straight side press by the present invention in the present embodiment, due to the difference of press tonnage and die size size, the size of required uniformly distributed load is also different with force region.The length of oil cylinder circuit board zone line can set by the force region needed for minimum tonnage, and now only need operation valve 7 action just passable, oil cylinder circuit board zone line produces uniformly distributed load.
Need to strengthen if tonnage changes force region, operation valve 7 and the action simultaneously of symmetrical pair of control valve 4 ', force region need be strengthened again, so just increasing pair of control valve 4 again " action; the region that namely exerts a force is strengthened, and only need increase the quantity of operation valve 4 action, if Fig. 1 is all operation valves 4 and operation valve 7 action simultaneously; cylinder piston rod 2 stretches out, and produces state during uniformly distributed load; Fig. 2 is that cylinder piston rod 2 is retracted, and lays down state during uniformly distributed load.
When measurement capability origination point, suppose to reach pressing machine nominal pressure when distance bottom dead centre h, the uniformly distributed load size that uniformly distributed load generating means produces is pressing machine nominal pressure, accumulator is utilized to maintain uniformly distributed load constant, as shown in Figure 4, in figure, dotted line is lower dead point position, slide block 11 lower plane present position is pressing machine ability origination point, to bottom dead centre distance be h, cylinder piston rod 2 stretches out and withstands slide block 11 lower plane, slide block continues to bottom dead centre close to when reaching bottom dead centre, if the distance that piston rod 2 declines 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 declines equals h, illustrate that this pressing machine can reach nominal pressure at ability origination point h place.
Claims (8)
1. a uniformly distributed load generating means, it is characterized in that: comprise oil cylinder circuit board, hydraulic control system, multiple oil cylinders that described oil cylinder circuit board comprises by row or arranges by row, oil cylinder the stretching by same hydraulic control system synchro control cylinder piston rod of often going or often arranging.
2. uniformly distributed load generating means as claimed in claim 1, it is characterized in that: the mediant row on described oil cylinder circuit board or ordered series of numbers oil cylinder control the flexible of cylinder piston rod by same hydraulic control system control synchronization, all the other oil cylinder stretching by other hydraulic control system synchro control cylinder piston rod of often going or often arranging.
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, and the rodless cavity of each oil cylinder of each column or row is also communicated with, and controls 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 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 is also communicated with, and controls the turnover of liquid by operation valve.
5. uniformly distributed load generating means as claimed in claim 4, it is characterized in that: often the rod chamber of row oil cylinder is communicated by pipeline, often the cavity of resorption of row oil cylinder is communicated by pipeline.
6. the uniformly distributed load generating means as described in claim 1,2 or 3, is characterized in that: contiguous block is installed in a side of described oil cylinder circuit board, and hydraulic control system is arranged on described contiguous block.
7. uniformly distributed load generating means as claimed in claim 6, it is characterized in that: described contiguous block is divided into the first contiguous block, the second contiguous block and the 3rd contiguous block, centre is the second contiguous block, and the first contiguous block and the 3rd contiguous block are installed relative to oil cylinder circuit board Central Symmetry.
8. uniformly distributed load generating means as claimed in claim 1, is characterized in that: described hydraulic control system also comprises for maintaining 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210300297.4A CN102853808B (en) | 2012-08-22 | 2012-08-22 | Uniformly-distributed load generating device |
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| CN102853808A CN102853808A (en) | 2013-01-02 |
| CN102853808B true CN102853808B (en) | 2015-06-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN107132124B (en) * | 2017-05-16 | 2020-07-31 | 宁波市交通建设工程试验检测中心有限公司 | Loading device of pressure testing machine |
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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 |
-
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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| Title |
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| 框式油压机机身的有限元分析和优化设计;刘茜等;《机械》;20040430;第31卷(第4期);10-12页 * |
| 模型试验柔性均布压力加载系统研制及其应用;王汉鹏等;《岩土力学》;20120731;第33卷(第7期);1945-1950页 * |
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