CN113405904B - Testing device for compression molding mechanical properties of loose materials - Google Patents
Testing device for compression molding mechanical properties of loose materials Download PDFInfo
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- CN113405904B CN113405904B CN202110615260.XA CN202110615260A CN113405904B CN 113405904 B CN113405904 B CN 113405904B CN 202110615260 A CN202110615260 A CN 202110615260A CN 113405904 B CN113405904 B CN 113405904B
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- 239000000463 material Substances 0.000 title claims abstract description 76
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000000748 compression moulding Methods 0.000 title claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 100
- 238000000034 method Methods 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 239000013590 bulk material Substances 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
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- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
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- 239000002028 Biomass Substances 0.000 description 3
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- 238000005056 compaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 239000003758 nuclear fuel Substances 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a testing device for the compression molding mechanical property of loose materials, which comprises: a frame; hopper: for applying material into the feed unit; the feeding unit is provided with a plurality of charging rings for receiving materials; the cam is driven by the driving unit to rotate so as to press the pressing unit; a gap for accommodating the charging ring is arranged between the pressing unit and the die unit; the pressing unit is used for pressing the material in the charging ring into the die unit; the driving unit is connected with the cam and the feeding unit through a first transmission mechanism and a second transmission mechanism respectively; the second transmission mechanism separates the feeding unit from the driving unit in the descending process of the pressing unit, so that a charging ring positioned between the pressing unit and the die unit is in a static state; when the pressing unit moves upwards to the highest position, the feeding unit is jointed with the driving unit to finish the sequential transmission of the charging rings, so that the charging rings are transmitted one by one; the measuring unit is used for measuring mechanical parameters. The device is consistent with the actual working condition.
Description
Technical Field
The invention belongs to the field of loose material press forming of design such as feed machinery, biomass energy, powder metallurgy, nuclear fuel pellets and the like, and particularly relates to a device for testing the press forming mechanical property of a loose material.
Background
The dense forming process refers to a technology of pressing loose materials into products with regular shapes and certain density by using a mold, and is widely applied to the fields of feed and biomass fuel processing, nuclear fuel pellet manufacturing, powder metallurgy and the like. At present, the technology mainly has the problems of difficult prediction of molding quality, high molding energy consumption and the like, and seriously restricts the development of related industries. In order to solve the problem, a great deal of research is carried out by relevant scholars at home and abroad, most of the research focuses on the influence of the characteristics of raw materials, process parameters, equipment structures and the like on the forming process and the product quality, but the problem is not fundamentally solved. The main reason is that the cost of carrying out the process test by using real equipment is too high, the process is not feasible, and no set of test device can simulate the compact forming process of loose materials under the actual working condition, and the stress-strain relationship of the compressed materials under the actual working condition cannot be tested.
The related documents at home and abroad are consulted, the related patents and documents of the testing device for the press forming mechanical property of the loose materials consistent with the actual working condition are not found, and no similar device can test the stress-strain relationship of the compact forming process of the loose materials under the actual working condition (high speed and continuous). The study of the relevant scholars was mainly carried out in conjunction with a single-well test device, the schematic diagram of which is shown in FIG. 1. This type of device can only be pressed at a constant speed and the force applied to the press bar is measured, the pressing speed is low and the stress-strain relationship of the material during the forming process cannot be tested. Patent ZL201310629828.9 mentions a multifunctional loose material forming test device, which cannot realize high-speed pressing close to the real working condition, cannot continuously operate, and cannot measure the stress-strain relationship of materials in the pressing process. Patent ZL201710396368.8 mentions a mechanical behavior testing device and a testing method thereof for a loose material compacting process, which can test the stress-strain relationship in the loose material compacting process, but needs to be driven by a universal testing machine or a hydraulic cylinder, the pressing speed is far lower than that of the loose material compacting process under actual working conditions, continuous experiments cannot be performed, and the collected data cannot accurately reflect the mechanical behavior of the loose material compacting process under the actual working conditions.
Disclosure of Invention
The invention aims to provide a testing device for the compression molding mechanical property of a loose material, which is used for simulating the compaction molding process of the loose material under the actual working condition and continuously compressing the loose material; and the stress-strain relationship of the loose materials in the compacting and forming process is tested in the compacting process, and the maximum pressing force applied to the loose materials in the compacting process is obtained, so that data support is provided for predicting the compacting and forming quality of the loose materials, optimizing the compacting and forming process of the loose materials and the like.
The technical solution for realizing the purpose of the invention is as follows:
a mechanical property testing device for press forming of loose materials comprises
A frame: the device is used for installing a pressing unit, a cam, a driving unit, a die unit, a hopper, a feeding unit, a second transmission mechanism and a measuring unit;
hopper: for applying material into the feed unit;
a feeding unit: a plurality of charging rings are arranged for receiving materials;
a cam: the pressing unit is driven by the driving unit to rotate so as to complete the periodic pressing of the pressing unit;
the pressing unit and the die unit are coaxially arranged, and a gap for accommodating a charging ring is arranged between the pressing unit and the die unit;
a pressing unit: for pressing material in a charge ring located between the press unit and the mould unit into the mould unit;
a drive unit: the cam and the feeding unit are respectively connected through a first transmission mechanism and a second transmission mechanism;
a second transmission mechanism: separating the feeding unit from the driving unit in the descending process of the pressing unit, and enabling a charging ring between the pressing unit and the die unit to be in a static state; when the pressing unit moves upwards to the highest position, the feeding unit is jointed with the driving unit to finish the sequential transmission of the charging rings, so that the charging rings are transmitted one by one;
a mold unit: the device is used for simulating the structures of different devices for pressing loose materials;
a measurement unit: the device is used for measuring mechanical parameters in the material compression molding process.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the pressing speed and the change rate thereof are consistent with the real working condition, and the adjustment of the pressing speed and the change rate thereof can be realized by replacing the cam.
(2) Through the drive pressing unit and the material changing unit of the synchronous belt, the bevel gear and the feeding mechanism, the upward and downward material distribution switching of the pressing mechanism is accompanied, automatic continuous feeding is realized, the feeding is not required to be stopped, and the feeding is consistent with the real working condition.
(3) The acquired test data can provide a data base for the optimization of the loose material compact forming process, thereby promoting the development of the industries of biomass energy, feed processing, powder metallurgy and the like in China.
Drawings
FIG. 1 is a schematic diagram of a conventional single-well testing apparatus.
FIG. 2 is an isometric view of the mechanical property testing device for bulk material compression molding of the invention.
FIG. 3 is a half sectional view of the mechanical property testing device for press forming of bulk materials.
FIG. 4 is a left side view of the mechanical property testing device for press forming of bulk materials.
FIG. 5 is a schematic view of a testing method of the testing device for mechanical properties of bulk material compression molding of the invention.
Fig. 6 is a graph of the displacement of the bulk material in the pressing zone versus time.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
With reference to fig. 2 to 4, the device for testing mechanical properties of press forming of bulk materials of this embodiment includes a frame, a driving unit, a pressing unit, a feeding unit, a mold unit, and a cam.
The driving unit adopts a motor 32, and the pressing unit comprises a spring 4, a pressing shaft 5, an upper bottom plate 6 and an upper sleeve 7; the machine frame comprises an upper bottom plate 6, an upper machine frame 18, a lower machine frame 15 and a lower bottom plate 25.
The motor 32 and the cam 16 are driven by a synchronous belt, the cam 16 is connected to the upper frame 18 through a cam shaft 17, the upper base plate 6 and the lower base plate 25 are connected and fixed through a plurality of support columns 35, and coaxiality between the upper sleeve 7 and the lower sleeve 10 is guaranteed within a certain range.
The upper sleeve is fixed on the upper bottom plate 6, and the pressing shaft 5 is arranged in the upper sleeve 7; and a return spring 4 is arranged between the pressing shaft 5 and the upper sleeve 7 and is used for returning the pressing shaft 5 upwards in the process of upwards moving the cam 16. The motor 32 transmits power to the cam 16 through the first small belt wheel 27 and the large belt wheel 33, the cam 16 rotates to drive the pressing shaft 5 to obtain expected vertical reciprocating motion, and the material pressing condition in the actual process of pressing loose materials is simulated; the pressing shaft 5 is driven by a cam, the pressing speed is consistent with that of a real device, and the pressing speed and the change rate of the pressing speed can be changed by replacing the cam 16. The top end of the pressing shaft 5 is provided with a first force measuring sensor 1, and the upper end of the spring 4 is provided with a second force measuring sensor 2 for measuring the pressure of the pressing shaft 5 on the material in the pressing process; the pressing shaft 5 is provided with a first displacement sensor 3 for measuring the displacement of the pressing shaft 5 in the pressing process.
The hopper 22 is fixed to the upper base plate 6 by a bracket 21.
The feeding unit comprises a charging ring 8, an annular baffle plate supporting barrel 12, a wheel disc shaft 20, a wheel disc 23, a barrel supporting column 24 and an annular baffle plate 34.
A plurality of charging rings 8 are fixedly connected on the wheel disc 23, and a plurality of charging rings 8 are fixed on the wheel disc 23 at equal intervals along the circumferential direction. The wheel disc 23 is fixedly connected to the wheel disc shaft 20, one end of the wheel disc shaft 20 is connected to the upper bottom plate 6 through a bearing, the other end of the wheel disc shaft is connected to the lower bottom plate 25, the annular baffle plate 34 is designed according to the movement route of the charging ring 8, is installed below the charging ring 8 and is fixedly connected to the lower bottom plate 25 through the annular baffle plate supporting barrel 12 and the charging barrel supporting column 24; the ring-shaped shutter support cylinder 12 brings the bottom of the charge ring 8, which is not between the press unit and the mold unit, into a supported state, and the bottom of the charge ring 8, which is between the press unit and the mold unit, into an open state.
One end of a gear shaft shifting fork 29 is fixedly connected to the pressing shaft 5, the other end of the gear shaft shifting fork is fixedly connected to a gear shaft 30, the gear shaft 30 is arranged in a gear shaft guide rail 31 and driven by the gear shaft shifting fork 29 to move up and down along the gear shaft guide rail 31, and the gear shaft guide rail 31 is fixedly connected to the upper bottom plate 6 through bolts; a pair of bevel gears 19 (including a driving bevel gear and a driven bevel gear) are respectively fixed on the wheel disc shaft 20 and the gear shaft 30, the gear shaft 30 is installed in a gear shaft guide rail 31 and driven by a gear shaft shifting fork 29 to move up and down along the gear shaft guide rail 31, and the gear shaft guide rail 31 is fixedly connected on the upper bottom plate 6 through bolts; the second small belt wheel 36 is fixedly connected to the other end of the gear shaft 30, and the power transmission process is as follows: the motor 32 drives the second small belt wheel 36 through the large belt wheel 33, the second small belt wheel 36 drives the gear shaft 30 and the driving bevel gear 19, the driven bevel gear 19 drives the wheel disc shaft 20, the wheel disc 23 and the charging ring 8, and quick material change is realized when the pressing shaft 5 rises to the highest gap through the gear shaft shifting fork 29 fixed on the pressing shaft 5. When the pressing shaft 5 rises to the highest position, the driven bevel gear 19 of the driving bevel gear 19 on the gear shaft 30 is meshed with the driven bevel gear 19, the wheel disc shaft 20 is driven to rotate, and then the plurality of charging rings 8 are driven to rotate, so that the circular feeding of experimental materials is realized, and the experiment can be continuously carried out.
The inner diameters of the upper sleeve 7 and the charging ring 8 are the same and are larger than the diameter of the pressing shaft 5, and the difference is 0.5-1 mm. Coaxiality of upper sleeve 7 and lower sleeve 10
The die unit comprises a die 9, a lower sleeve 10, a temperature control barrel 11 and a die supporting ring 14; the lower sleeve 10, the temperature control cylinder 11 and the annular baffle plate supporting cylinder 12 are coaxially arranged, the lower sleeve 10, the temperature control cylinder 11 and the annular baffle plate supporting cylinder 12 are sequentially arranged from inside to outside and are fixedly connected onto a lower bottom plate 25 through bolts, and the lower bottom plate 25 is fixedly connected onto a lower rack 15 through bolts; the die 9, the third load cell 13 and the die support ring 14 are all placed in the lower sleeve 10, the die 9, the third load cell 13 and the die support ring 14 are sequentially arranged from top to bottom, the die support ring 14 is in direct contact with the lower bottom plate 25, the third load cell 13 is positioned between the die support ring 14 and the die 9 and used for measuring the pressure borne by the die 9, the second displacement sensor 26 is a laser displacement sensor and is arranged right below the die, and laser is injected into a die hole and used for measuring the displacement of materials in the die hole.
The die 9 is provided with N3 through holes (N3 is more than or equal to 1) as die holes, the diameter is 1-30 mm, and the through holes are uniformly distributed near the symmetry axis of the die. The sum of the heights of the die 9 and the die supporting ring 14 is equal to the height of the lower sleeve 10, and the length-diameter ratio of the die hole on the die 9 can be changed by combining the die 9 and the die supporting ring 14 with different heights.
The displacement signal acquisition device selects NI 9215, the force signal acquisition device selects NI PXI-4472B, and the second displacement sensor adopts a laser displacement sensor.
If the actual equipment is a ring die granulator, the radius R of the compression roller is 80mm, the radius R of the ring die is 350mm, and the center distance h between the compression roller and the ring die0When 92mm and the ring die speed n is 300r/min, the time dependence of the compacted bulk material can be calculated according to equation (1):
in the formula, h is the displacement of the loose materials, and t is the running time.
A graph of the material displacement-time relationship is obtained by plotting t as the abscissa and h as the ordinate, as shown in FIG. 6.
The loose material distribution switching time of the feeding unit is the residence time of the pressing shaft at the highest position:
bevel gear ratio i is 1, first small pulley radius r140mm, second small pulley radius r2The number N of the charging rings is 8 when the diameter is 40mm, and the residence time T of the pressing shaft at the highest position is calculated by the formula:
the cam is designed according to a material displacement-time relation graph (figure 6) and the residence time T of the pressing shaft at the highest position, and the rotating speed of the cam is 300r/min when the cam runs stably.
With reference to fig. 5, the testing method of the testing device for testing the mechanical properties of the press forming of the loose materials comprises the following steps:
as shown in fig. 5, wherein (1) is a schematic view of the bulk material which is initially pre-compressed and begins to move into the compression area (between the upper and lower sleeves) after compression; (2) the schematic diagram of the complete movement of the charging ring to the pressing area for the first time; (3) is a schematic diagram of the state of the process of pressing the loose materials for the first time; (4) is a schematic diagram of the state of the first compact material after being pressed; (5) the schematic diagram that the pressing shaft rises to the highest position after the first pressing is finished; (6) is a schematic diagram of the removal of the loading ring after the first pressing is finished; and (n) is a schematic diagram of the extrusion state of the compact material after n times of pressing.
and 11, recording the force and displacement in the pressing process by the first force measuring sensor 1, the second force measuring sensor 2, the first displacement sensor 3, the third force measuring sensor 13 and the second displacement sensor 26, and researching the mechanical behavior of the loose material in the compaction forming process by analyzing test data.
Through analysis of the test data, the stress-strain relationship in the loose material forming process, the friction force between the material and the inner wall of the mold, the positive pressure between the material and the inner wall of the mold and the sliding friction coefficient between the material and the inner wall of the mold can be obtained. Wherein, the relationship between the data recorded by the displacement sensor 8 and the second force transducer 11 in the pressing process is the stress-strain relationship in the loose material forming process; at the same time, the difference between the data recorded by the first load cell 9 and the second load cell 11 is the friction between the material and the inner wall of the mold during the molding process.
Claims (7)
1. The utility model provides a bulk material compression moulding mechanical properties testing arrangement which characterized in that includes:
a frame: the device is used for installing a pressing unit, a cam, a driving unit, a die unit, a hopper, a feeding unit and a measuring unit;
hopper: for applying material into the feed unit;
a feeding unit: a plurality of charging rings are arranged for receiving materials;
a cam: the pressing unit is driven by the driving unit to rotate so as to complete the periodic pressing of the pressing unit;
the pressing unit and the die unit are coaxially arranged, and a gap for accommodating a charging ring is arranged between the pressing unit and the die unit;
a pressing unit: for pressing material in a charge ring located between the press unit and the mould unit into the mould unit;
a mold unit: the device is used for simulating the structures of different devices for pressing the loose materials;
a drive unit: the cam and the feeding unit are respectively connected through a first transmission mechanism and a second transmission mechanism;
a second transmission mechanism: separating the feeding unit from the driving unit in the descending process of the pressing unit, and enabling a charging ring between the pressing unit and the die unit to be in a static state; when the pressing unit moves upwards to the highest position, the feeding unit is jointed with the driving unit to finish the sequential transmission of the charging rings, so that the charging rings are transmitted one by one;
a measurement unit: the device is used for measuring mechanical parameters in the process of material compression molding.
2. The mechanical property testing device for the press forming of the loose materials according to claim 1, wherein the second transmission mechanism comprises a synchronous belt transmission mechanism, a gear shaft shifting fork, a guide seat, a driving bevel gear and a driven bevel gear which are meshed with each other;
the driving unit is connected with a gear shaft of the driving bevel gear through a synchronous belt transmission mechanism; the pressing unit is connected with the gear shaft through a gear shaft shifting fork; the gear shaft is arranged in the guide seat and can slide up and down in the guide seat; and the driven bevel gear is connected with the feeding unit to drive the feeding unit to rotate.
3. The mechanical property testing device for the press forming of the loose materials according to claim 1, wherein the feeding unit comprises a wheel disc shaft, a wheel disc and an annular baffle plate; the wheel disc shaft is vertically and rotatably supported on the rack; the wheel disc shaft is fixed with a wheel disc, and a plurality of charging rings are fixed on the wheel disc at equal intervals along the circumferential direction; the ring-shaped baffle is fixed on the frame and is positioned at the lower end of the charging ring, so that the bottom of the charging ring which is not positioned between the pressing unit and the die unit is in a supporting state, and the bottom of the charging ring which is positioned between the pressing unit and the die unit is in an open state.
4. The mechanical property testing device for the press forming of the loose materials according to claim 1, wherein the pressing unit comprises a pressing shaft, an upper sleeve and a return spring;
the upper sleeve is fixed on the frame, and the pressing shaft is arranged in the upper sleeve; and a return spring is arranged between the pressing shaft and the upper sleeve and is used for upward return of the pressing shaft in the upward process of the cam.
5. The mechanical property testing device for the press forming of the loose materials according to claim 1, wherein the die unit comprises a die, a lower sleeve and a temperature control cylinder which are coaxially arranged from inside to outside in sequence; the lower end of the mold is provided with a mold supporting ring, the mold supporting ring is arranged on the rack, and a plurality of mold holes are formed in the mold.
6. The bulk material press forming mechanical property testing device of claim 1, wherein the measuring unit comprises a first load cell, a second load cell, a third load cell, a first displacement sensor and a second displacement sensor;
the first force measuring sensor and the second force measuring sensor are used for measuring the pressure of the pressing unit on the material in the pressing process;
the third force measuring sensor is used for measuring the pressure borne by the die;
the first displacement sensor is used for measuring the displacement of the pressing unit in the pressing process;
the second displacement sensor is used for measuring the displacement of the material in the die unit.
7. The mechanical property testing device for the press forming of the loose materials as claimed in claim 2, wherein the retention time T when the pressing unit moves upwards to the highest position is as follows:
where i is the bevel gear ratio, r1Radius of the driven pulley of the first transmission mechanism, r2The radius of a driven belt wheel of the second transmission mechanism, N is the rotating speed of the ring die, and N is the number of charging rings.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201272036Y (en) * | 2008-07-07 | 2009-07-15 | 杭州万达液压机械有限公司 | Loose material forming machine |
| CN201979717U (en) * | 2011-02-01 | 2011-09-21 | 季陵 | Bulk material briquetting machine |
| CN103675207A (en) * | 2013-11-28 | 2014-03-26 | 南京理工大学 | Multifunctional loose material forming test device |
| CN103983390A (en) * | 2014-05-09 | 2014-08-13 | 南京理工大学 | Measuring device for mechanical parameters of powder rotating extruding granulation forming |
| CN206011813U (en) * | 2016-08-30 | 2017-03-15 | 福建南安市华天机械有限公司 | A kind of multilamellar material-feeding mechanism of automatic Powder forming press |
| CN107036893A (en) * | 2017-05-31 | 2017-08-11 | 南京理工大学 | The compact formed process mechanical behavior test device of bulk material and its method of testing |
| CN107088950A (en) * | 2017-05-24 | 2017-08-25 | 北京瑞图科技发展有限公司 | A kind of rotary-die type concrete product forming machine |
| CN112023831A (en) * | 2020-08-19 | 2020-12-04 | 南京理工大学 | Fine and close shaping frictional wear test device of bulk material |
| CN112497815A (en) * | 2020-11-30 | 2021-03-16 | 泰州鸿材科技有限公司 | Device for assisting powder press forming |
-
2021
- 2021-06-02 CN CN202110615260.XA patent/CN113405904B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201272036Y (en) * | 2008-07-07 | 2009-07-15 | 杭州万达液压机械有限公司 | Loose material forming machine |
| CN201979717U (en) * | 2011-02-01 | 2011-09-21 | 季陵 | Bulk material briquetting machine |
| CN103675207A (en) * | 2013-11-28 | 2014-03-26 | 南京理工大学 | Multifunctional loose material forming test device |
| CN103983390A (en) * | 2014-05-09 | 2014-08-13 | 南京理工大学 | Measuring device for mechanical parameters of powder rotating extruding granulation forming |
| CN206011813U (en) * | 2016-08-30 | 2017-03-15 | 福建南安市华天机械有限公司 | A kind of multilamellar material-feeding mechanism of automatic Powder forming press |
| CN107088950A (en) * | 2017-05-24 | 2017-08-25 | 北京瑞图科技发展有限公司 | A kind of rotary-die type concrete product forming machine |
| CN107036893A (en) * | 2017-05-31 | 2017-08-11 | 南京理工大学 | The compact formed process mechanical behavior test device of bulk material and its method of testing |
| CN112023831A (en) * | 2020-08-19 | 2020-12-04 | 南京理工大学 | Fine and close shaping frictional wear test device of bulk material |
| CN112497815A (en) * | 2020-11-30 | 2021-03-16 | 泰州鸿材科技有限公司 | Device for assisting powder press forming |
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Application publication date: 20210917 Assignee: JIANGSU FAMSUN INTELLIGENT TECHNOLOGY Co.,Ltd. Assignor: NANJING University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980016722 Denomination of invention: A testing device for mechanical properties of loose materials during compaction Granted publication date: 20220624 License type: Common License Record date: 20220928 |