CN104777036B - A kind of square bale machine bale ties the measuring method of rope tension - Google Patents
A kind of square bale machine bale ties the measuring method of rope tension Download PDFInfo
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- CN104777036B CN104777036B CN201510187878.5A CN201510187878A CN104777036B CN 104777036 B CN104777036 B CN 104777036B CN 201510187878 A CN201510187878 A CN 201510187878A CN 104777036 B CN104777036 B CN 104777036B
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- becket bridle
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Abstract
The present invention relates to the measuring method that a kind of square bale machine bale ties rope tension, its step：The polypropylene for being used for a baler bundle rope is chosen, different length bundle rope two ends are pooled capital to form becket bridle and break into α knots；Pretightning force is applied to α knots using universal testing machine；Data fitting is carried out to all tensile loads-elongation relation formula by SPSS analysis softwares, tensile load-elongation relation formula of such bundle rope becket bridle is drawn；To becket bridle, each region elongation distributional difference is verified in drawing process, obtains becket bridle elongation distribution in each region in stretching consistent；Obtained elongation is substituted into tensile load-elongation relation formula, the bundle rope tension size in the region is obtained.Present invention measurement is easy, accuracy is high, with low cost, the features such as meet various test objects and various complex working conditions, can be widely applied in baler and bale screen resilience research field.
Description
Technical field
The present invention relates to a kind of method for measuring and rope tension being tied on bale, especially with regard to a kind of bundled stalk mechanical property
Square bale machine bale in detection method technical field ties the measuring method of rope tension.
Background technology
Collection, storage and the transport of agricultural crop straw are always the head that restriction agricultural biomass resource industrially scalable is utilized
Problem is wanted, it is to solve the problems, such as that agricultural biomass stalk stores up fortune to develop baler, meets the effective way of industrialized utilization
One of.At present, the research to baler bale screen resilience is less, main reason is that bale surface is tied, the tension force restricted is more difficult to be obtained for it
Take, the tension force of research bale surface bundle rope is one of selection bundle rope and the Main Basiss of research baler Partial key parameter.
When baler works, bundle rope tension is that destruction bundle is restricted and leads to not stablize bundled one of the main reasons.Selection
Suitable baler bundle is restricted, and can both ensure the quality of bale, prevents bundle rope to be pulled off or slip the scattered bundle of appearance because bale expands
Phenomenon, can avoid again because selection high standard bundle rope and caused by waste.The bundle rope used in baler is mainly polypropylene bundle at this stage
Jag, determine can not be by installing pulling force in existing baler Song Sheng mechanisms and into the mutual alignment relation of knot device for the bundle rope
Sensor carrys out direct-on-line measurement bundle rope tension.Bundle rope is on bale by a state after bundled, now cuts off bundle rope again
Result and actual grave fault can be caused by installing pulling force sensor, lack scientific.And traditional 3 wheel tension sensor costs compared with
Height, surveying range is larger, is not suitable for existing experimental study.Therefore, a kind of accurate and effective and with low cost measurement side is selected
Method seems particularly necessary.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide the measuring method that a kind of square bale machine bale ties rope tension, the party
Method process is easy, accuracy is high, with low cost, can meet various test objects and various complex working conditions.
To achieve the above object, the present invention takes following technical scheme：A kind of square bale machine bale ties the measurement side of rope tension
Method, it comprises the following steps：1) polypropylene for being used for a baler bundle rope is chosen, is intercepted from the bundle rope some sections different long
The test bundle rope of degree, bundle rope two ends to be tested, which are pooled capital to form becket bridle, and break into baler manually at end is formed
α knots, to each becket bridle carry out calibrating length, take the becket bridle of different length to be tested respectively；2) three are taken under each length
The bundle rope of equal length is parallel to each other control as three bundle ropes, using universal testing machine of the prior art to α knots
Apply pretightning force, it is ensured that will not occur sliding phenomenon when becket bridle is stretched at α knots；3) becket bridle is fixed on ten thousand by two pins
On the fixture of energy Material Testing Machine, slow stretching is carried out to becket bridle, the draw speed of universal testing machine is set by PC, first
Becket bridle is stretched to the state that tension force is zero, the draw speed of universal testing machine is then readjusted by PC, until will
Becket bridle is broken, and by PC record tensile load and the relation curve and data of displacement；4) using SPSS mathematical softwares to stretching
Load carries out analysis calculating with displacement curve, draws corresponding tensile load-extension curve, and by SPSS mathematical softwares
Fit the mathematical formulae of tensile load-elongation relation；5) using SPSS analysis softwares to all tensile load-elongations
Rate relation formula carries out data fitting, draws tensile load-elongation relation formula of such bundle rope becket bridle；6) becket bridle is existed
Each region elongation distributional difference is verified in drawing process, obtains the elongation distribution one in becket bridle each region in stretching
Cause；7) by obtained elongation substitute into step 5) in tensile load-elongation relation formula in, obtain the bundle rope in the region
Tensity size.
The step 3) in, the becket bridle of the universal testing machine range is exceeded for stretching displacement, will
Two strands of the becket bridle is merged into four strands, stretched again after stereotyped writing, and multiple conversion processing is carried out to load and displacement when calculating.
The step 6) in, the elongation distributional difference carries out verification method and is：Selection random length becket bridle, and
With 4 equidistant mark points of marking pen mark on the becket bridle, the becket bridle is drawn by the universal testing machine
Experiment is stretched, the distance between adjacent marker point is then measured, by calculating, the elongation distribution one between four mark points
Cause.
The present invention is due to taking above technical scheme, and it has advantages below：The square bale machine bale bundle rope that the present invention is provided
The measuring method of tension force can be applicable any kind bundle rope and any kind compressed object, and simply variety classes bundle rope is derived
Tensile load-elongation relation formula is different.This method method of testing is simple, with low cost, and data accuracy compared with
It is high.The present invention can be widely applied in baler and bale screen resilience research field.
Brief description of the drawings
Fig. 1 is the universal test material machine stretching becket bridle schematic diagram of the present invention；
Fig. 2 is the bundled preceding bale and bundle rope mark point schematic layout pattern of the present invention；
Fig. 3 is the bundled rear bale and bundle rope mark point schematic layout pattern of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
The present invention provides the measuring method that a kind of square bale machine bale ties rope tension, and it comprises the following steps：
1) polypropylene for being used for a baler bundle rope is chosen, the test bundle of some sections of different lengths is intercepted from the bundle rope
Rope, bundle rope two ends to be tested are pooled capital to form becket bridle 1, and break into the α knots that baler is formed manually at end, right
Each becket bridle carries out calibrating length, take respectively length for 20cm, 40cm, 60cm, 80cm, 100cm, 120cm, 140cm, 160cm,
180cm, 200cm, 220cm and 240cm becket bridle are tested.
2) take the bundle ropes of three equal lengths to be parallel to each other control as three bundle ropes under each length, utilize prior art
In universal testing machine 2 to α knots apply 500N pretightning forces, will not be slided at α knots during ensuring that becket bridle 1 is stretched
Move phenomenon.
3) as shown in figure 1, becket bridle 1 is enclosed on two pins 3, and two pins 3 are separately fixed at universal material examination
On the fixture for testing machine 2；After fixing, slow stretching is carried out to becket bridle 1, the stretching speed of universal testing machine 2 is set by PC 4
Spend for 30mm/min, stretching becket bridle 1 to lucky tensioned state stops, and the tension force of becket bridle 1 is zero this moment；Then set again by PC 4
Determine the initial displacement and initial load value of universal test material machine, set the draw speed of universal test material machine 1 as 200mm/
Min, until becket bridle 1 is broken, and is recorded by PC 4 relation curve and data of tensile load and displacement.
4) analysis calculating is carried out to tensile load and displacement curve using SPSS mathematical softwares, show that corresponding stretching is carried
Lotus-extension curve, and fit the number that the length ties tensile load-elongation relation under rope by SPSS mathematical softwares
Learn formula.
5) due to carrying out difference analysis to tensile load-elongation relation formula using SPSS analysis softwares, rope stretching is obtained
This body length is unrelated with becket bridle for ring tensile load-elongation relation, therefore all stretchings are carried using SPSS analysis softwares
Lotus-elongation relation formula carries out data fitting, and the tensile load-elongation relation formula for drawing such bundle rope becket bridle 1 is：
Y=8548.5x2+3480.9x-52.031
In formula, x is elongation, and unit is %；Y is tensile load, and unit is N.
6) obtain after 1 tensile load of becket bridle-elongation relation formula, to becket bridle 1 in drawing process each region elongation
Distributional difference is verified that verification method is：Random length becket bridle is chosen, and it is equidistant with marking pen mark 4 on becket bridle
Mark point, by universal testing machine 2 to becket bridle 1 carry out tension test, draw speed is 200mm/min, is stretched to
25% elongation, then measures the distance between adjacent marker point this moment, by calculating, stretching between four mark points
Long rate is distributed as 24.5%, 24.5%, 25%, it follows that the elongation distribution in each region in stretching of becket bridle 1 is consistent.
7) by obtained elongation substitute into step 5) in formula in, you can obtain the bundle rope tension size in the region.
As shown in Figure 2 and Figure 3, before bale 5 is bundled, it is marked in the open end of becket bridle 1, mark point on bundled preceding becket bridle 1
The distance between 6 be 200mm, after baler 7 terminates bundling action, to certain phase in becket bridle mark point 9 on the bale 8 after bundled
The distance between adjacent two points are accurately measured, and it is 220mm to draw actual range, it follows that the elongation of region bundle rope
For 10%, bundle rope elongation rate is substituted into becket bridle tensile load-elongation relation formula, it can be deduced that the section ties rope tension
About 450N.
Above-mentioned steps 3) in, the becket bridle 1 of the range of universal testing machine 2 may be exceeded for stretching displacement, can be with
Two strands of becket bridle is merged into four strands, stretched again after stereotyped writing, carrying out multiple conversion to load and displacement when calculating is handled
Can.
Above-mentioned steps 3) in, if sliding phenomenon or non-tensile phenomenon occurs in drawing process, the becket bridle 1 need to be removed, again
Do the becket bridle tension test of the batch.
The various embodiments described above are merely to illustrate the present invention, and can not limit the scope of the present invention.The present embodiment is only to certain phase
Region bundle rope tension tied between survey calculation, other adjacent marker points the measurement side of rope tension between adjacent two mark points
Method is as embodiment step, and therefore not to repeat here.All improvement and equivalent change carried out according to the principle of the invention to separate step
Change, should not exclude outside protection scope of the present invention.
Claims (2)
1. a kind of square bale machine bale ties the measuring method of rope tension, it comprises the following steps：
1) polypropylene for being used for a baler bundle rope is chosen, the test bundle rope of some sections of different lengths is intercepted from the bundle rope,
Bundle rope two ends to be tested are pooled capital to form becket bridle, and the α knots that baler is formed are broken into manually at end, to each rope
Ring carries out calibrating length, takes the becket bridle of different length to be tested respectively；
2) the bundle ropes of three equal lengths is taken to be parallel to each other control as three bundle ropes under each length, using of the prior art
Universal testing machine applies pretightning force to α knots, it is ensured that will not occur sliding phenomenon when becket bridle is stretched at α knots；
3) becket bridle is fixed on the fixture of universal testing machine by two pins, slow stretching is carried out to becket bridle, by PC
The draw speed of universal testing machine is set, becket bridle is first stretched to the state that tension force is zero, then readjusted by PC
The draw speed of universal testing machine, until becket bridle is broken, and by PC record tensile load and the relation curve of displacement
And data；
4) analysis calculating is carried out to tensile load and displacement curve using SPSS mathematical softwares, draws corresponding tensile load-stretch
Long rate curve, and fit by SPSS mathematical softwares the mathematical formulae of tensile load-elongation relation；
5) data fitting is carried out to all tensile loads-elongation relation formula using SPSS analysis softwares, show that such is tied
Tensile load-elongation relation formula of rope becket bridle：
Y=8548.5x2+3480.9x-52.031
In formula, x is elongation, and unit is %；Y is tensile load, and unit is N；
6) to becket bridle, each region elongation distributional difference is verified in drawing process, obtains becket bridle each region in stretching
Elongation distribution it is consistent；
Random length becket bridle is chosen, and passes through the omnipotent material with 4 equidistant mark points of marking pen mark on the becket bridle
Expect that testing machine carries out tension test to the becket bridle, then measure the distance between adjacent marker point, by calculating, four
Elongation distribution between mark point is consistent；
7) before bale is bundled, it is marked in becket bridle open end, obtains the distance between mark point on bundled preceding becket bridle, waits to beat
Bundle machine terminates after bundling action, and it is accurate that the distance between certain two neighboring point in becket bridle mark point on the bale after bundled is carried out
Measurement, draw actual range, it follows that the region bundle rope elongation, will tie rope elongation rate substitute into step 5) in stretching carry
In lotus-elongation relation formula, the bundle rope tension size in the region is obtained.
2. a kind of square bale machine bale as claimed in claim 1 ties the measuring method of rope tension, it is characterised in that：The step 3)
In, the becket bridle of the universal testing machine range is exceeded for stretching displacement, two strands of the becket bridle is merged into
Four strands, stretched again after stereotyped writing, multiple conversion processing is carried out to load and displacement when calculating.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107976270A (en) * | 2017-12-03 | 2018-05-01 | 桐乡市易知简能信息技术有限公司 | A kind of elastomer for showing pressure |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105115651B (en) * | 2015-07-27 | 2017-06-06 | 中国农业大学 | A kind of action of synchronous detection knotter and the device and method of bundle rope tension change |
| CN105547894A (en) * | 2015-12-03 | 2016-05-04 | 青岛华凯海洋科技有限公司 | Testing method of safety performances of static rope |
| CN105823643A (en) * | 2016-03-17 | 2016-08-03 | 安徽农业大学 | Knotter performance test bench |
| CN110307954B (en) * | 2019-07-01 | 2020-10-27 | 内蒙古农业大学 | Movable round bale resilience force test bench |
| CN112432856B (en) * | 2020-11-27 | 2022-09-09 | 青岛鲁普耐特绳网研究院有限公司 | Mooring fiber cable with precise mooring length and method for obtaining same |
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| CN101025392A (en) * | 2007-03-23 | 2007-08-29 | 王宇峥 | Method for detecting mechanical performance testing data and system thereof |
| US20110251803A1 (en) * | 2010-04-09 | 2011-10-13 | Lucas Teurlay | Assembly, system, and method for cable tension measurement |
| CN102998175B (en) * | 2011-09-15 | 2014-10-29 | 北汽福田汽车股份有限公司 | Method for testing elongation at break of metal material |
| CN104429369B (en) * | 2014-11-10 | 2016-06-22 | 中国农业大学 | " θ " of a kind of straw ties knotting device and method |
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Cited By (1)
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| CN107976270A (en) * | 2017-12-03 | 2018-05-01 | 桐乡市易知简能信息技术有限公司 | A kind of elastomer for showing pressure |
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