CN110672509A - Straw cutting performance testing device and testing method - Google Patents
Straw cutting performance testing device and testing method Download PDFInfo
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- CN110672509A CN110672509A CN201910840199.1A CN201910840199A CN110672509A CN 110672509 A CN110672509 A CN 110672509A CN 201910840199 A CN201910840199 A CN 201910840199A CN 110672509 A CN110672509 A CN 110672509A
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Abstract
The invention discloses a straw cutting performance testing device, which comprises a bottom plate, a precise guide rail, a clamping device, a buffering limiting device, a pulling pressure sensor, an AD converter and a display device, wherein a fixed sleeve and a handle are arranged on the bottom plate; buffering stop device cover is established on accurate guide rail, and be located the fixed sleeve upper end, draw pressure sensor and bottom plate middle part fastening connection, the AD converter passes through the data line and is connected with drawing pressure sensor, display device passes through the data line and is connected with the AD converter, detect straw cutting performance under the different cutting modes, analysis blade structural parameter and motion parameter are to cutting force and the influence of cutting consumption, smash the design of returning the field blade for the straw and provide theoretical support and practice reference, shorten design cycle, reduce design cost.
Description
Technical Field
The invention belongs to the technical field of measurement, and particularly relates to a straw cutting performance testing device and a testing method.
Background
The crop straw crushing is one of the agricultural mechanized production processes and is also a key technology of straw returning operation. The blade is used as a key part for straw crushing, the structure and parameters of the blade play a decisive role in the crushing quality, and different cutting modes also have obvious influence on the crushing quality.
Therefore, the selection of the structure and parameters of the blade and the cutting mode is a key step for designing the straw crushing and returning operation machine. The crop varieties are various, and the parameters and cutting modes of the blade suitable for cutting different crop straws are different, so that the cutting performance of the crop straws needs to be mastered before the blade is designed. If the mode of design first and then field test verification is adopted, the design period is long, the blade is various in types, and the cost is high. And the existing straw cutting test bed has no shearing function and can not detect the straw cutting performance completely.
Disclosure of Invention
The invention provides a device and a method for testing the straw cutting performance, which are used for detecting the straw cutting performance in different cutting modes, analyzing the influence of structural parameters and motion parameters of a blade on cutting force and cutting power consumption, and providing theoretical support and practical reference for the design of a straw crushing and returning blade, thereby shortening the design period and reducing the design cost.
In order to achieve the purpose, the invention adopts the technical scheme that: a straw cutting performance testing device comprises a bottom plate, a precise guide rail, a clamping device, a buffering limiting device, a pulling pressure sensor, an AD converter and a display device, wherein two fixed sleeves and two handles are arranged on the bottom plate;
buffering stop device cover is established on accurate guide rail, and is located the fixed sleeve upper end, draws pressure sensor and bottom plate middle part fastening connection, the AD converter passes through the data line and draws pressure sensor to be connected, display device passes through the data line and is connected with the AD converter.
Preferably, the buffering and limiting device is a damping rubber sleeve or a spring or foamed plastic.
Preferably, the vertical direction mark on the precision guide rail is provided with a height dimension scale value.
Preferably, an upper blade is arranged below the connecting plate, and a lower blade is arranged on the pull pressure sensor.
Preferably, the display device is a notebook computer.
A test method of a straw cutting performance test device specifically comprises the following steps,
the method comprises the following steps: selecting straws of the same crop with the same section diameter, and cutting the straws with the same length;
step two: winding a proper amount of transparent adhesive tape at two ends of the straw to be measured obtained in the step one, then placing the wound adhesive tape part on a fixed clamping plate, then covering a movable clamping plate, pressing the movable clamping plate on the fixed clamping plate through a bolt, and clamping the straw;
step three: selecting a pair of upper blades and lower blades, mounting the upper blades in the middle of the connecting plate, and mounting the lower blades on the tension and pressure sensor;
step four: opening the pull pressure sensor, the AD converter and the display device;
step five: determining the cutting speed v according to the selected crop straw, and utilizing a formula
Calculating the falling height H value of the upper blade;
step six: manually lifting the clamping device to the scale H of the precision guide rail, and then releasing the clamping device to enable the clamping device to do free-falling body movement;
step seven: in the process of cutting the straws, a pressure sensor is pulled to regularly acquire the pressure value borne by the lower blade, then the acquired data is transmitted to a notebook computer for recording through an AD converter, and the relation curve of the cutting force F borne by the lower blade and the time t is displayed;
step eight: and analyzing the cutting performance according to the relation curve of the cutting force F and the time t.
The beneficial effect of adopting above technical scheme is: this straw cutting performance testing arrangement detects straw cutting performance under the different cutting modes, and the influence of analysis blade structural parameter and motion parameter to cutting force and cutting consumption provides theoretical support and practical reference for the design of straw crushing still field blade to shorten design cycle, reduce design cost.
Drawings
FIG. 1 is a schematic view of the overall structure of the straw cutting performance testing device;
FIG. 2 is a schematic view of the upper or lower blade upper chamfer angle;
FIG. 3 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.2 m;
FIG. 4 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.3 m;
FIG. 5 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.4 m;
FIG. 6 is a graph of cutting force F and time t of a cutter with a 30-degree sliding angle and a straw falling from a height of 1.3 m;
FIG. 7 is a graph of cutting force F and time t for a cutter with a 60 ° slip angle to fall from a height of 1.3m with straw;
wherein:
1. a base plate; 2. a precision guide rail; 3. a clamping device; 4. a buffer limiting device; 5. a pull pressure sensor; 6. an AD converter; 7. a display device; 8. an upper blade; 9. a lower blade;
10. fixing the sleeve; 11. a handle;
30. a slider; 30-1, fixing the splint; 31. a connecting plate; 32. the clamping plate is moved.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
As shown in fig. 1 to 7, the invention relates to a straw cutting performance testing device and a testing method, which are used for detecting straw cutting performance under different cutting modes, analyzing the influence of structural parameters and motion parameters of a blade on cutting force and cutting power consumption, and providing theoretical support and practical reference for the design of a straw crushing and returning blade, thereby shortening the design period and reducing the design cost.
Specifically, as shown in fig. 1 to 7, the straw cutting performance testing device comprises a bottom plate 1, a precision guide rail 2, a clamping device 3, a buffering limiting device 4, a tension pressure sensor 5, an AD converter 6 and a display device 7, wherein two fixing sleeves 10 and two handles 11 are arranged on the bottom plate 1, the lower end of the precision guide rail 2 is screwed with the fixing sleeves 10, the clamping device 3 is composed of a sliding block 30, a connecting plate 31 and a movable clamping plate 32, the sliding block 30 is respectively connected with the precision guide rail 2 in a sliding manner, two ends of the connecting plate 31 are respectively connected with the side surface of the sliding block 30 in a fastening manner, the lower end of the sliding block 30 is provided with the fixed clamping plate 30-1 in a fastening manner, and the movable clamping plate 32 is detachably connected with the fixed clamping plate 30-;
As shown in fig. 1, the buffering and limiting device 4 is a damping rubber sleeve or a spring or foamed plastic.
And the vertical direction mark on the precise guide rail 2 is provided with a height dimension scale value.
As shown in fig. 1, an upper blade 8 is arranged below the connecting plate 31, and a lower blade 9 is arranged on the tension and pressure sensor 5.
As shown in fig. 1, the display device 7 is a notebook computer.
A test method of a straw cutting performance test device specifically comprises the following steps,
the method comprises the following steps: selecting straws of the same crop with the same section diameter, and cutting the straws with the same length;
step two: winding a proper amount of transparent adhesive tape at two ends of the straw to be measured obtained in the step one, then placing the wound adhesive tape part on a fixed clamping plate 30-1, then covering a movable clamping plate 32, pressing the movable clamping plate 32 on the fixed clamping plate 30-1 through a bolt, and clamping the straw;
step three: selecting a pair of upper blades 8 and lower blades 9, installing the upper blades 8 in the middle of the connecting plate 31, and installing the lower blades 9 on the tension and pressure sensor 5;
step four: opening the pull pressure sensor 5, the AD converter 6, and the display device 7;
step five: determining the cutting speed v according to the selected crop straw, and utilizing a formula
Calculating the falling height H value of the upper blade 8;
step six: manually lifting the clamping device 3 to the scale H of the precision guide rail 2, and then releasing the clamping device to enable the clamping device to do free-falling body movement;
step seven: in the process of cutting the straws, a pressure sensor 5 is used for periodically acquiring the pressure value borne by the lower blade 9, then the acquired data is transmitted to a notebook computer for recording through an AD converter 6, and the relation curve of the cutting force F borne by the lower blade 9 and the time t is displayed;
step eight: and analyzing the cutting performance according to the relation curve of the cutting force F and the time t.
The following specific working modes are illustrated by specific examples:
example 1:
the straws of the same crop with the same section diameter fall from the heights of 1.2m, 1.3m and 1.4m respectively and are cut by an upper blade and a lower blade with a sliding cutting angle of 45 degrees, and the test parameters of the collected cutting force F and the time t are as follows:
FIG. 3 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.2 m;
FIG. 4 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.3 m;
FIG. 5 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.4 m;
as shown in fig. 3, 4 and 5, the higher the dropping height of the straw is, the higher the cutting speed V of the straw when the straw is in contact with the lower blade 9 is, the lower the cutting force F is.
Example 2:
the straws of the same crop with the same section diameter fall from the same height of 1.3m and are cut by an upper blade and a lower blade with sliding cutting angles of 30 degrees, 45 degrees and 60 degrees respectively, and the test parameters of the collected cutting force F and the time t are as follows:
FIG. 4 is a graph of cutting force F and time t of a cutter with a sliding cutting angle of 45 degrees, which takes the straw to fall from a height of 1.3 m;
FIG. 6 is a graph of cutting force F and time t of a cutter with a 30-degree sliding angle and a straw falling from a height of 1.3 m;
FIG. 7 is a graph of cutting force F and time t of a cutter with a sliding cut angle of 60 degrees, which takes the straw to fall from a height of 1.3 m;
as shown in fig. 4, 6 and 7, it can be seen that the larger the kiss cut angle of the upper blade 8 and the lower blade 9 is, the smaller the cutting force F is, i.e. the more easily the straw is cut.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the invention based on the principles and technical solutions of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (6)
1. The utility model provides a straw cutting capability test device which characterized in that: the device comprises a bottom plate (1), a precision guide rail (2), a clamping device (3), a buffering limiting device (4), a pulling pressure sensor (5), an AD converter (6) and a display device (7), wherein two fixing sleeves (10) and two handles (11) are arranged on the bottom plate (1), the lower end of the precision guide rail (2) is in threaded screwing connection with the fixing sleeves (10), the clamping device (3) consists of a sliding block (30), a connecting plate (31) and a movable clamping plate (32), the sliding block (30) is respectively in sliding connection with the precision guide rail (2), two ends of the connecting plate (31) are respectively in fastening connection with the side faces of the sliding block (30), the lower end of the sliding block (30) is fixedly provided with the fixed clamping plate (30-1), and the movable clamping plate (32) is detachably connected with the fixed clamping plate (30-1) through bolts;
buffering stop device (4) cover is established on accurate guide rail (2), and is located fixed sleeve (10) upper end, draws pressure sensor (5) and bottom plate (1) middle part fastening connection, AD converter (6) are connected through the data line with drawing pressure sensor (5), display device (7) are connected through data line and AD converter (6).
2. The straw cutting performance testing device according to claim 1, characterized in that: the buffering and limiting device (4) is a damping rubber sleeve or a spring or foamed plastic.
3. The straw cutting performance testing device according to claim 1, characterized in that: and the vertical direction mark on the precise guide rail (2) is provided with a height dimension scale value.
4. The straw cutting performance testing device according to claim 1, characterized in that: an upper blade (8) is arranged below the connecting plate (31), and a lower blade (9) is arranged on the pull pressure sensor (5).
5. The straw cutting performance testing device according to claim 1, characterized in that: the display device (7) is a notebook computer.
6. A testing method of a straw cutting performance testing device is characterized in that: the method specifically comprises the following steps of,
the method comprises the following steps: selecting straws of the same crop with the same section diameter, and cutting the straws with the same length;
step two: winding a proper amount of transparent adhesive tape at two ends of the straw to be measured obtained in the step one, then placing the wound adhesive tape part on a fixed clamping plate (30-1), then covering a movable clamping plate (32), pressing the movable clamping plate (32) on the fixed clamping plate (30-1) through a bolt, and clamping the straw;
step three: selecting a pair of upper blades (8) and lower blades (9), installing the upper blades (8) in the middle of the connecting plate (31), and installing the lower blades (9) on the tension and pressure sensor (5);
step four: opening the pull pressure sensor (5), the AD converter (6) and the display device (7);
step five: determining the cutting speed v according to the selected crop straw, and utilizing a formula
Calculating the falling height H value of the upper blade (8);
step six: manually lifting the clamping device (3) to the scale H of the precision guide rail (2), and then releasing the clamping device to enable the clamping device to do free-falling body movement;
step seven: in the process of cutting the straws, a pressure sensor (5) is used for periodically acquiring the pressure value borne by the lower blade (9), then the acquired data is transmitted to a notebook computer for recording through an AD converter (6), and the relation curve of the cutting force F borne by the lower blade (9) and the time t is displayed;
step eight: and analyzing the cutting performance according to the relation curve of the cutting force F and the time t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910840199.1A CN110672509A (en) | 2019-09-06 | 2019-09-06 | Straw cutting performance testing device and testing method |
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| CN201910840199.1A CN110672509A (en) | 2019-09-06 | 2019-09-06 | Straw cutting performance testing device and testing method |
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| CN101710045A (en) * | 2009-11-11 | 2010-05-19 | 中国农业大学 | Method and device for detecting elasticity modulus of corn stalks |
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| CN103308380A (en) * | 2013-06-07 | 2013-09-18 | 夏兆鹏 | Softening effect test instrument and softening effect test method for wood microcosmic section softening reagent |
| CN106358608A (en) * | 2016-08-31 | 2017-02-01 | 安徽农业大学 | Husking device for maize harvesting machine |
| CN207730636U (en) * | 2018-01-10 | 2018-08-14 | 安徽农业大学 | A kind of portable carpopodium biomechanics characteristic test device |
| CN109374437A (en) * | 2018-10-10 | 2019-02-22 | 重庆文理学院 | Crops stalk shear stress measuring device |
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2019
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6422091B1 (en) * | 2000-07-20 | 2002-07-23 | Playtex Products, Inc. | Apparatus for testing the life expectancy of a straw |
| CN101216389A (en) * | 2007-12-27 | 2008-07-09 | 江苏大学 | Agricultural material dynamic characteristic test apparatus and method |
| CN101509856A (en) * | 2008-12-30 | 2009-08-19 | 南京理工大学 | Multifunction flexible composite material impact test apparatus |
| CN101710045A (en) * | 2009-11-11 | 2010-05-19 | 中国农业大学 | Method and device for detecting elasticity modulus of corn stalks |
| CN102004061A (en) * | 2010-09-27 | 2011-04-06 | 泰安鲁普耐特塑料有限公司 | Rope belt cutting-resisting property detection device |
| CN103063568A (en) * | 2012-12-27 | 2013-04-24 | 江苏大学 | Testing apparatus for straw cutting performance and testing method thereof |
| CN103308380A (en) * | 2013-06-07 | 2013-09-18 | 夏兆鹏 | Softening effect test instrument and softening effect test method for wood microcosmic section softening reagent |
| CN106358608A (en) * | 2016-08-31 | 2017-02-01 | 安徽农业大学 | Husking device for maize harvesting machine |
| CN207730636U (en) * | 2018-01-10 | 2018-08-14 | 安徽农业大学 | A kind of portable carpopodium biomechanics characteristic test device |
| CN109374437A (en) * | 2018-10-10 | 2019-02-22 | 重庆文理学院 | Crops stalk shear stress measuring device |
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