Powder tap density testing device

Abstract

The application relates to the technical field of test equipment, and discloses a powder vibration density testing device, which comprises a testing table, a vibration mechanism, a measuring cylinder, a moving mechanism and a height measuring mechanism. The testing table comprises a table frame main body and a first track, the first track surrounds the table frame main body, the vibration mechanism is installed on the table frame main body, the measuring cylinder is installed on the vibration mechanism, the measuring cylinder is provided with a transparent cylinder wall, the moving mechanism comprises a first moving part, a second moving part and a second track, the first moving part is movably installed on the first track, the second track is installed on the first moving part, the second moving part is movably installed on the second track, the second moving part moves in the height direction of the measuring cylinder on at least part of the second track, the height measuring mechanism is installed on the second moving part, and the height measuring mechanism is used for detecting the height of the powder. The technical scheme is applied to solve the problem that manual operation for reading the powder in the measuring cylinder affects the test precision of the vibration density when the vibration density of the powder is tested in a laboratory.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of test equipment, and particularly relates to a powder tap density testing device. BACKGROUND

[0002] In the design and production process of a lithium ion battery, tap density of powder of a manufacturing material of the lithium ion battery needs to be tested and analyzed in a laboratory, so that relevant process data of tap density production of the powder in a production workshop, such as vibration force, vibration frequency and the like, are determined.

[0003] At present, in the process of tap density testing of the powder in the laboratory, after the powder is vibrated, a measuring cylinder needs to be manually taken out, and then the measuring cylinder is manually rotated by 360 degrees, so as to manually visually measure and read the highest scale and the lowest scale of the powder in the measuring cylinder. The whole process needs to keep the measuring cylinder always vertical, that is, to ensure that the measuring cylinder is not inclined and is not affected by other vibrations. However, since the process is manually operated, the operator is easily disturbed in the operation process, which leads to inclination deviation of the measuring cylinder and hand-shaking vibration, and then leads to result deviation of the highest scale and the lowest scale of the powder in the measuring cylinder, thereby affecting the test precision of the tap density. CONTENT OF THE INVENTION

[0004] The application aims to provide a powder tap density testing device, and aims to solve the problem that manual operation for reading the powder in the measuring cylinder affects the test precision of the tap density when the tap density of the powder is tested in the laboratory.

[0005] To achieve the above-mentioned purpose, a powder tap density testing device is provided. The powder tap density testing device comprises a test table, a vibration mechanism, a measuring cylinder, a moving mechanism and a height measuring mechanism. The test table comprises a table frame main body and a first track. The first track surrounds the table frame main body. The vibration mechanism is installed on the table frame main body. The measuring cylinder is installed on the vibration mechanism. The measuring cylinder is used for accommodating the powder. The measuring cylinder has a transparent cylinder wall. The moving mechanism comprises a first moving part, a second moving part and a second track. The first moving part is installed on the first track and can move along the first track. The second track is installed on the first moving part. The second moving part is movably installed on the second track. The second moving part moves along the height direction of the measuring cylinder on at least part of the second track. The height measuring mechanism is installed on the second moving part. The height measuring mechanism is used for detecting the height of the powder in the measuring cylinder.

[0006] The embodiment of the present application provides a powder tap density testing device, which does not need human participation in the whole process of obtaining test data of the powder, that is, the powder tap density testing device performs a tapping operation on the powder in the measuring cylinder through a vibration mechanism, then drives a height measuring mechanism to move along the height direction of the measuring cylinder and to move around the circumference of the measuring cylinder through a moving mechanism, so that the height measuring mechanism detects the height of the powder in the measuring cylinder. In this way, during the height detection of the powder in the measuring cylinder, the measuring cylinder is always placed on the table frame body, and the influence of the tilting deviation and hand shaking of the measuring cylinder caused by the manual 360° rotation of the measuring cylinder is eliminated. Moreover, when the moving mechanism drives the height measuring mechanism to move relative to the measuring cylinder and to detect, the moving mechanism can stably move, which is beneficial to guarantee the relative stability between the height measuring mechanism and the measuring cylinder, thereby improving the detection accuracy of the height detection of the powder in the measuring cylinder and helping to improve the tap density test accuracy.

[0007] In some embodiments, the powder tap density testing device further comprises a processor installed on the table frame body, and the vibration mechanism, the first moving part, the second moving part and the height measuring mechanism are in communication connection with the processor. The vibration density test is automatically controlled through the processor, the process of manual participation is cancelled, and the possibility that the tilting deviation and hand shaking of the measuring cylinder caused by the manual participation affect the tapping state of the powder in the measuring cylinder is eliminated, thereby helping to improve the tap density test accuracy.

[0008] In some embodiments, the powder tap density testing device further comprises a weighing mechanism installed on the table frame body, the weighing mechanism is used for weighing the mass of the powder in the measuring cylinder, and the weighing mechanism is electrically connected with the processor. After the powder is loaded into the measuring cylinder, the mass of the powder is obtained through automatic weighing operation, the influence of the missing powder caused in the process of transferring and loading the weighed powder into the measuring cylinder is eliminated, and the test accuracy of the powder tap density test is improved.

[0009] In some embodiments, the weighing mechanism is fixedly installed on the vibration mechanism, and the measuring cylinder is fixedly installed on the weighing mechanism.

[0010] In some embodiments, the vibration mechanism comprises a vibration part and a locking part connected to the vibration part, the vibration part is movably installed on the table frame body, and the locking part is used for locking the vibration part and the table frame body; the weighing mechanism comprises a jacking structure and a weighing collection structure, the jacking structure is installed on the table frame body, and the weighing collection structure is installed on the jacking structure and located directly below the vibration part. In this way, during the vibration of the vibration part and the powder in the measuring cylinder, the weighing mechanism and the vibration mechanism are kept in a disengaged state, and the weighing mechanism is not affected by the vibration, thereby prolonging the service life of the weighing mechanism.

[0011] In some embodiments, the first track is provided with a gear ring, the first moving part comprises a first moving support, a first motor and a first gear, the first moving support is movably installed on the first track, the first motor is fixedly installed on the first moving support, the first gear is rotatably installed on the first moving support, the rotating shaft of the first motor is in driving connection with the first gear, and the first gear is in meshing transmission with the gear ring. The processor can easily control the speed of the height measuring mechanism in circumferential movement around the measuring cylinder, and the first gear has stable transmission characteristics in meshing transmission with the gear ring, so as to reduce the possibility of shaking of the height measuring mechanism, thereby clearly and accurately measuring the average height of the powder in the measuring cylinder.

[0012] In some embodiments, the second track comprises a mounting support and a lead screw, the mounting support is fixedly installed on the first moving support, and the lead screw is rotatably installed on the mounting support. The second moving part comprises a second motor and a second moving support, the second motor is fixedly installed on the first moving support, the rotating shaft of the second motor is in driving connection with the lead screw, the second moving support is provided with a threaded hole, the lead screw is arranged in the threaded hole and threadedly matches with the threaded hole, and the height measuring mechanism is installed on the second moving support. In this way, the slight error of the measurement result caused by the relative height difference between the height measuring mechanism and the top of the powder can be reduced, so as to further clearly and accurately measure the average height of the powder in the measuring cylinder and improve the measurement accuracy.

[0013] In some embodiments, the axis direction of the lead screw is parallel to the axis direction of the measuring cylinder. The second moving support can be most quickly moved to reach a height position substantially level with the top of the powder in the measuring cylinder, thereby improving the test efficiency.

[0014] In some embodiments, the second track further comprises a first guide structure, the extension direction of the first guide structure is parallel to the axis direction of the lead screw, the second moving support is provided with a second guide structure, and the second guide structure is slidably connected to the first guide structure. Through the mutual guide cooperation of the first guide structure and the second guide structure, the second moving support moves along the lead screw more stably, so as to accurately drive the height measuring mechanism to move to the height position substantially level with the top of the powder in the measuring cylinder.

[0015] In some embodiments, the height measuring mechanism comprises an optical recognition system for detecting and identifying the highest point and the lowest point of the top of the powder in the measuring cylinder.

[0016] In some embodiments, the second track comprises a rack, one end of the rack is fixedly installed on the first moving support, the second moving part comprises a second motor, a second moving support and a second gear, the second moving support is movably connected to the rack, the second motor is fixedly installed on the second moving support, the second gear is rotatably installed on the second moving support, the rotating shaft of the second motor is drivingly connected with the second gear, the second gear is engaged with the rack, and the height measuring mechanism is installed on the second moving support. Since the second gear is engaged with the rack for transmission with stable characteristics, the height measuring mechanism is stably and accurately driven to move to a height position substantially level with the top of the powder in the measuring cylinder.

[0017] In some embodiments, the rack comprises a straight section and an arc section connected in sequence, the extending direction of the straight section is parallel to the axial direction of the measuring cylinder, the straight section is tangent to the arc section, and the end of the arc section away from the straight section is located directly above the measuring cylinder. In this way, the highest and lowest heights of the top of the powder can be further accurately identified and determined, and the average height of the powder in the measuring cylinder can be more accurately obtained.

[0018] In some embodiments, the height measuring mechanism comprises an optical recognition system for detecting and identifying the highest and lowest points of the top of the powder in the measuring cylinder; and / or, the height measuring mechanism comprises a laser ranging system for detecting the highest and lowest points of the top of the powder in the measuring cylinder when the second moving support moves to the end of the arc section away from the straight section. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 A perspective structural schematic view of a powder tap density testing device according to an embodiment of the present application;

[0021] Figure 2 A perspective structural schematic view of a powder tap density testing device according to an embodiment of the present application; Figure 1 A front view schematic view of a powder tap density testing device according to an embodiment of the present application;

[0022] Figure 3 A front view schematic view of a powder tap density testing device according to an embodiment of the present application; Figure 2 An enlarged schematic view of A in FIG. 4;

[0023] Figure 4 An enlarged schematic view of A in FIG. 4; Figure 1 A top view schematic view of a powder tap density testing device according to an embodiment of the present application;

[0024] Figure 5Fig. 1 is a front view of a schematic diagram of another powder tap density testing device according to an embodiment of the present application;

[0025] Figure 6 Fig. 1 is a front view of a schematic diagram of another powder tap density testing device according to an embodiment of the present application; Figure 5 Fig. 1 is a front view of a schematic diagram of another powder tap density testing device according to an embodiment of the present application;

[0026] In the drawings, the same or similar reference signs refer to the same or similar elements or components.

[0027] 10, test table; 11, table frame main body; 12, first track; 121, gear ring;

[0028] 20, vibration mechanism; 21, vibration part; 22, locking part;

[0029] 30, measuring cylinder;

[0030] 40, weighing mechanism; 42, jacking structure; 43, weighing collection structure;

[0031] 50, moving mechanism; 51, first moving part; 511, first moving bracket; 512, first motor; 513, first gear; 52, second moving part; 521, second motor; 522, second moving bracket; 523, second gear; 53, second track; 531, mounting bracket; 532, screw rod; 533, first guide structure; 534, rack; 5341, straight section; 5342, arc section; 54, second guide structure;

[0032] 60, height measuring mechanism; 61, optical recognition system; 62, laser ranging system;

[0033] 70, processor. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and are not to be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0036] In addition, the terms "first", "second", and the like are used only for descriptive purposes, and should not be construed as indicating or implying relative importance or an indicated number of the specified technical characteristics. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0038] At present, from the development of market situation, the application of lithium ion battery is more and more widely. Lithium ion battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station (lithium ion batteries of such applications are generally referred to as energy storage batteries), but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields (lithium ion batteries of such applications are generally referred to as power batteries). With the continuous expansion of the application field of lithium ion battery, the market demand is also increasing, and the quality requirements of users for lithium ion battery products are also increasing. The product quality of lithium ion battery not only reflects in the structure design of lithium ion battery product, but also reflects in the production and manufacturing process parameters of lithium ion battery product. Generally speaking, strict and fine production and manufacturing process parameters can help improve product quality, but strict and fine production and manufacturing process parameters will lead to low production efficiency. How to balance the contradiction between strict and fine production and manufacturing process parameters and production efficiency is one of the production problems to be solved. Among them, in the design and production process of lithium ion battery, the vibration compaction process of the powder material is one of the necessary processes, that is, the vibration compaction process of the powder material also needs strict and fine production and manufacturing process parameters to ensure product quality.

[0039] In the process of compacting manufacturing materials, to balance the challenge of stringent and precise manufacturing parameters with production efficiency, it is necessary to conduct compaction density tests on the powder materials used in lithium-ion batteries during the design and production process. This determines the relevant process data for compaction in the production workshop. Then, during the compaction process in the production workshop, these experimentally obtained process data are applied to improve product quality.

[0040] However, in related technologies, during the laboratory tapped density test of powder, after the powder has finished vibrating, the measuring cylinder needs to be manually removed and then manually rotated 360°. The highest and lowest readings of the powder in the measuring cylinder are then visually inspected and read. Throughout this process, the measuring cylinder must remain vertical to ensure there is no tilting or other vibrations. However, because this process is done manually, the operator is easily distracted, leading to cylinder tilting and hand tremors. This results in deviations in the readings of the highest and lowest powder readings, thus affecting the accuracy of the tapped density test.

[0041] Based on the above considerations, embodiments of this application provide a powder tapped density testing device. This device obtains test data for powder without human intervention throughout the entire process. Specifically, the device uses a vibration mechanism to tap the powder in a graduated cylinder, and then a moving mechanism drives a height measuring mechanism to move along the height direction of the graduated cylinder and around its circumference, thereby allowing the height measuring mechanism to detect the height of the powder in the graduated cylinder. Thus, during the height detection process, the graduated cylinder remains stationary on the platform, eliminating the tilting and hand-shaking effects that could be caused by manual 360° rotation of the graduated cylinder. Furthermore, when the moving mechanism moves the height measuring mechanism relative to the graduated cylinder for detection, the mechanism moves stably, ensuring relative stability between the height measuring mechanism and the graduated cylinder, thereby improving the detection accuracy of the powder height in the graduated cylinder and contributing to the improved accuracy of the tapped density test.

[0042] To illustrate the technical solutions provided by the embodiments of this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0043] Embodiments of this application provide a powder tap density testing device. For example... Figures 1 to 4As shown, the powder tap density testing device comprises a testing table 10, a vibrating mechanism 20, a measuring cylinder 30, a moving mechanism 50 and a height measuring mechanism 60. The testing table 10 comprises a table frame body 11 and a first track 12 surrounding the table frame body 11. The vibrating mechanism 20 is installed on the table frame body 11. The measuring cylinder 30 is installed on the vibrating mechanism 20 and is used to contain powder. The measuring cylinder 30 has a transparent cylinder wall. The moving mechanism 50 comprises a first moving part 51, a second moving part 52 and a second track 53. The first moving part 51 is installed on and movable along the first track 12. The second track 53 is installed on the first moving part 51. The second moving part 52 is movably installed on the second track 53 and moves along the height direction of the measuring cylinder 30 on at least a part of the second track 53. The height measuring mechanism 60 is installed on the second moving part 52 and is used to detect the height of the powder in the measuring cylinder 30.

[0044] The powder tap density testing device provided by the embodiment of the present application does not require human operation in the whole process of obtaining the test data of the powder, that is, the powder tap density testing device performs the tapping operation on the powder in the measuring cylinder 30 through the vibrating mechanism 20, then drives the height measuring mechanism 60 to move along the height direction of the measuring cylinder 30 and to move around the circumference of the measuring cylinder 30 through the moving mechanism 50, so that the height measuring mechanism 60 detects the height of the powder in the measuring cylinder 30. In this way, during the height detection of the powder in the measuring cylinder 30, the measuring cylinder 30 and the powder therein are always placed still on the table frame body 11, which eliminates the influence of the tilting deviation and the hand shake of the measuring cylinder 30 caused by the manual 360° rotation of the measuring cylinder 30 on the tapping state of the powder in the measuring cylinder 30. Moreover, when the height measuring mechanism 60 moves relative to the measuring cylinder 30 and performs detection, the moving mechanism 50 can move stably, which is conducive to ensuring the relative stability between the height measuring mechanism 60 and the measuring cylinder 30, thereby improving the detection accuracy of the height of the powder in the measuring cylinder 30 and the tap density testing accuracy.

[0045] In the powder tap density testing device, the vibrating mechanism 20 drives the measuring cylinder 30 to vibrate up and down in the vertical direction, so as to tap the powder in the measuring cylinder 30. Since the top of the powder filled in the measuring cylinder 30 is not scraped flat before being tapped, the top of the powder after being tapped is generally still undulating, that is, the top of the tapped powder has the highest point and the lowest point, and correspondingly, the powder has the highest height h1 and the lowest height h2. When calculating the tap density of the powder, the average height Δh of the powder needs to be used, that is The measuring cylinder 30 can be a transparent glass measuring cylinder, a transparent plastic measuring cylinder, or a transparent acrylic measuring cylinder, and has clear height markings. For active powders of lithium ion batteries, a measuring cylinder 30 with a larger volume can be used when the active powders have a larger tap density, and a measuring cylinder 30 with a smaller volume can be used when the active powders have a smaller tap density.

[0046] In some embodiments, when performing the tap density test, the operator needs to start the vibration mechanism 20, the moving mechanism 50, and the height measuring mechanism 60 respectively, i.e., the vibration mechanism 20, the moving mechanism 50, and the height measuring mechanism 60 are independent of each other, and the operator starts the vibration mechanism 20, the first moving part 51, the second moving part 52, and the height measuring mechanism 60 according to the preset test parameters to perform the respective test steps of the tap density test. After the height measuring mechanism 60 measures the average height Δh of the powders in the measuring cylinder 30, the operator records the average height Δh of the powders by pen and paper. Then, the operator calculates the tap density of the powders in the measuring cylinder 30 according to the mass m of the powders in the measuring cylinder 30 and the density calculation formula

[0047] ,

[0048] wherein, is the density of the powders, m is the mass of the powders, s is the cross-sectional area of the measuring cylinder 30, and Δh is the average height of the powders,

[0049] The tap density value of the powders in the measuring cylinder 30 after being tapped is calculated by the operator.

[0050] As Figure 1 and Figure 2In some embodiments, the powder tap density testing device further comprises a processor 70, which can be a module with control and calculation functions composed of a circuit board, an MCU, a display and other configuration components. The processor 70 is installed on the main body 11 of the table frame, and the vibration mechanism 20, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 are all in communication connection with the processor 70. The operator inputs the preset test parameters in the processor 70, then loads the powder into the cylinder 30, and starts the processor 70. Then the processor 70 controls the vibration mechanism 20, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 to perform the respective test steps of the tap density test according to the input preset test parameters, so as to automatically perform the tap density test, cancel the process of manual operation, and eliminate the possibility of the influence of the inclination deviation of the cylinder 30 and the hand-shaking vibration on the tap state of the powder in the cylinder 30 caused by manual operation, which helps to improve the tap density test precision. The preset test parameters are, for example, the operation step sequence parameters for controlling the vibration mechanism 20, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 to perform respective operations, the vibration frequency parameters for controlling the vibration mechanism 20 to drive the cylinder 30 to vibrate, the parameters for controlling the moving speed of the first moving part 51 and the second moving part 52, the cross-sectional area s of the cylinder 30 (the cylinder 30 is a cylindrical cylinder, and the cross-sectional area is known), and the like.

[0051] The MCU is the abbreviation of Micro Control Unit, i.e. micro control unit, also known as single-chip microcomputer or single-chip microcomputer. It is to reduce the frequency and specifications of the central processing unit (CPU), and integrate the memory, timer, USB, A / D conversion, UART, PLC, DMA and other peripheral interfaces, even LCD drive circuit on a single chip to form a chip-level computer.

[0052] When the processor 70 controls the vibration mechanism 20, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 to perform the respective operation steps, the processor 70 receives and records the height information of the powder in the cylinder 30 detected by the height measuring mechanism 60, and then analyzes and calculates the average height Dh of the powder in the cylinder 30. Moreover, the operator inputs the density calculation formula when inputting the preset test parameters:

[0053]

[0054] wherein, is the density of the powder, m is the mass of the powder, s is the cross-sectional area of the cylinder 30, and Dh is the average height of the powder, ​

[0055] The mass m of the powder, the average height Ah of the powder, and the calculated value of the tap density of the powder in the cylinder 30 are input into the processor 70. Thus, the processor 70 calculates the tap density of the powder in the cylinder 30 according to the mass m of the powder loaded in the cylinder 30, the average height Ah of the powder, and the above-mentioned calculation formula. Thus, the test process is fully automated, and the test result (i.e., the tap density of the powder) is automatically calculated. The test process is efficient, and the test result is accurate.

[0056] In some embodiments, the mass m of the powder can be measured before the powder is loaded into the cylinder 30. Then, the mass m of the powder is input into the processor 70 as one of the preset test parameters. The powder that has been weighed is loaded into the cylinder 30, and the processor 70 is started. The processor 70 controls the vibration mechanism 20, the first moving part 51, the second moving part 52, and the height measuring mechanism 60 to perform the respective test steps of the tap density test according to the input preset test parameters, so that the tap density test is automatically performed.

[0057] If the mass m of the powder is measured before the powder is loaded into the cylinder 30, the weighed powder needs to be manually transferred and loaded into the cylinder 30 by the operator. During the process of transferring the powder into the cylinder 30, a small amount of the powder may Figure 1 、 Figure 2 and Figure 4 be lost due to the shaking of the operator, the air flow, or the remaining powder in the transfer container. This may directly affect the final test result of the tap density test of the powder, i.e., the test accuracy of the tap density test of the powder. In order to further improve the test accuracy of the tap density test of the powder, as shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, and 100 of the present disclosure, in some embodiments, the tap density test device further comprises a weighing mechanism 40 installed on the main body 11 of the table frame (the weighing mechanism 40 can be directly installed on the main body 11 of the table frame; alternatively, the weighing mechanism 40 can be indirectly installed on the main body 11 of the table frame). The weighing mechanism 40 is used to measure the mass m of the powder in the cylinder 30. That is, the mass m of the powder is obtained by automatically weighing the powder after the powder is loaded into the cylinder 30, and then the vibration mechanism 20, the first moving part 51, the second moving part 52, and the height measuring mechanism 60 are started to perform the respective test steps of the tap density test. Thus, the influence of the loss of the powder during the process of transferring the weighed powder into the cylinder 30 can be eliminated, and the test accuracy of the tap density test of the powder can be improved.

[0058] In some embodiments, the weighing mechanism 40, the vibrating mechanism 20, the moving mechanism 50 and the height measuring mechanism 60 are independent of each other, and the operator starts the weighing mechanism 40, the vibrating mechanism 20, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 according to the preset test parameters to perform the respective test steps of the vibration density test. The operator records the mass m of the powder by hand, and after the average height Ah of the powder in the cylinder 30 is measured by the height measuring mechanism 60, the operator records the average height Ah of the powder by hand. Then, the operator calculates the vibration density of the powder in the cylinder 30 according to the mass m and the height of the powder in the cylinder 30 according to the density calculation formula The operator calculates the vibration density of the powder in the cylinder 30 by himself.

[0059] As shown in Figure 1 , Figure 2 and Figure 4 , in some embodiments, the weighing mechanism 40 is fixedly installed on the vibrating mechanism 20, the cylinder 30 is fixedly installed on the weighing mechanism 40, and the weighing mechanism 40 is electrically connected with the processor 70. When the powder is loaded into the cylinder 30, the weighing mechanism 40 immediately weighs the mass of the cylinder 30 and the powder therein, and the mass of the cylinder 30 is known, so as to obtain the mass m of the powder in the cylinder 30, and the weighing mechanism 40 transmits the mass m of the powder to the processor 70. Then, the processor 70 controls the vibrating mechanism 20, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 to perform the respective test steps of the vibration density test according to the input preset test parameters, so as to automatically perform the vibration density test.

[0060] In the above embodiment in which the cylinder 30 is fixedly installed on the weighing mechanism 40, the vibrating mechanism 20 drives the weighing mechanism 40 and the cylinder 30 to vibrate together to vibrate the powder in the cylinder 30. During the vibration, the cylinder 30 and the powder therein are switched between the state of overloading pressing the weighing mechanism 40 and the state of unloading releasing the weighing mechanism 40, until the vibration is completed. This will affect the service life of the weighing mechanism 40, resulting in the need to frequently replace the weighing mechanism 40. In order to improve the service life of the weighing mechanism 40, as Figure 5As shown, in some embodiments, the vibrating mechanism 20 comprises a vibrating part 21 and a locking part 22 connected to the vibrating part 21, the vibrating part 21 is movably mounted to the frame body 11, the locking part 22 is used to lock the vibrating part 21 and the frame body 11, and the weighing mechanism 40 comprises a jacking structure 42 and a weighing collecting structure 43, the jacking structure 42 is mounted to the frame body 11, and the weighing collecting structure 43 is mounted to the jacking structure 42 and located directly below the vibrating part 21, wherein the vibrating part 21, the locking part 22, the jacking structure 42 and the weighing collecting structure 43 are electrically connected to the processor 70. In this embodiment, when the powder is loaded into the measuring cylinder 30 and the processor 70 is started, the processor 70 first unlocks the locking part 22 so that the vibrating part 21 is in a movable state relative to the frame body 11; then the processor 70 controls the jacking structure 42 to drive the weighing collecting structure 43 to move upwards, so that the weighing collecting structure 43 abuts against the vibrating part 21, and the vibrating part 21 and the measuring cylinder 30 loaded with the powder are jacked to a suspended state relative to the frame body 11, and then the jacking structure 42 stops rising; when the vibrating mechanism 20 and the measuring cylinder 30 are stable, the weighing collecting structure 43 measures the mass of the vibrating mechanism 20, the measuring cylinder 30 and the powder, and the mass of the vibrating mechanism 20 and the measuring cylinder 30 is known, so the mass m of the powder in the measuring cylinder 30 is obtained, and the weighing collecting structure 43 transmits the mass m of the powder to the processor 70. Then, the processor 70 controls the jacking structure 42 to drive the weighing collecting structure 43 to move downwards and away from the vibrating part 21, and the processor 70 controls the locking part 22 to lock the vibrating part 21 to the frame body 11. Then, the processor 70 controls the vibrating part 21, the first moving part 51, the second moving part 52 and the height measuring mechanism 60 to perform the respective test steps of the vibration density test according to the input pre-set test parameters, so as to automatically perform the vibration density test. In this way, the weighing mechanism 40 and the vibrating mechanism 20 are kept in a disengaged state during the vibration of the vibrating part 21, the weighing mechanism 40 is not affected by the vibration, so as to prolong the service life of the weighing mechanism 40.

[0061] As Figure 1 and Figure 4As shown, in some embodiments, the first track 12 is provided with a gear ring 121, the first moving part 51 comprises a first moving support 511, a first motor 512 and a first gear 513, the first moving support 511 is movably installed on the first track 12, the first motor 512 is fixedly installed on the first moving support 511, and the first motor 512 is electrically connected with the processor 70, the first gear 513 is rotatably installed on the first moving support 511, the rotating shaft of the first motor 512 is drivingly connected with the first gear 513, and the first gear 513 is engaged with the gear ring 121. After the test steps of weighing the powder and vibrating the powder are completed, the processor 70 controls the first motor 512 to start to drive the first gear 513 to rotate, and then the first gear 513 drives the first moving support 511 to move along the first track 12 through the engagement transmission along the gear ring 121, that is, drives the height measuring mechanism 60 to move along the circumference of the measuring cylinder 30, so as to detect the average height Δh of the powder in the measuring cylinder 30. The processor 70 can easily control the output power and the rotating speed of the first motor 512, that is, can easily control the speed of the height measuring mechanism 60 moving along the circumference of the measuring cylinder 30, and the engagement transmission of the first gear 513 along the gear ring 121 has a stable characteristic to reduce the possibility of the height measuring mechanism 60 shaking, so as to clearly and accurately measure the average height Δh of the powder in the measuring cylinder 30.

[0062] In order to further clearly and accurately measure the average height Δh of the powder in the measuring cylinder 30, as shown in FIG. 6, the first track 12 is provided with a second track 122, the second moving part 52 comprises a second moving support 521, a second motor 522 and a second gear 523, the second moving support 521 is movably installed on the second track 122, the second motor 522 is fixedly installed on the second moving support 521, and the second motor 522 is electrically connected with the processor 70, the second gear 523 is rotatably installed on the second moving support 521, the rotating shaft of the second motor 522 is drivingly connected with the second gear 523, and the second gear 523 is engaged with the gear ring 121. Figure 1 and Figure 2As shown, in some embodiments, the second track 53 includes a mounting bracket 531 and a lead screw 532. The mounting bracket 531 is fixedly mounted on the first movable bracket 511, and the lead screw 532 is rotatably mounted on the mounting bracket 531. The second moving part 52 includes a second motor 521 and a second movable bracket 522. The second motor 521 is fixedly mounted on the first movable bracket 511, and the shaft of the second motor 521 is drivenly connected to the lead screw 532. The second movable bracket 522 is provided with a threaded hole, and the lead screw 532 passes through the threaded hole and is threadedly engaged with the threaded hole. The height measuring mechanism 60 is mounted on the second movable bracket 522. After completing the test steps of weighing and compacting the powder, the processor 70 first controls the second motor 521 to start, thereby driving the lead screw 532 to rotate. Then, the second movable bracket 522 moves along the lead screw 532, that is, the second movable bracket 522 drives the height measuring mechanism 60 to move to a height position that is basically level with the top of the powder in the measuring cylinder 30. Then, the processor 70 controls the first motor 512 to start, driving the first gear 513 to rotate. The first gear 513 meshes with the gear ring 121, driving the first moving bracket 511 to move along the first track 12. This causes the height measuring mechanism 60 to move circumferentially around the measuring cylinder 30, thereby detecting the average height Δh of the powder in the measuring cylinder 30. Since the height measuring mechanism 60 is positioned at approximately the same height as the top of the powder in the measuring cylinder 30 during its circumferential movement, the slight error in the measurement result caused by the relative height difference between the height measuring mechanism 60 and the top of the powder is reduced. This further ensures a clearer and more accurate measurement of the average height Δh of the powder in the measuring cylinder 30, improving measurement accuracy.

[0063] like Figure 2 As shown, in some embodiments, the axial direction of the lead screw 532 is parallel to the axial direction of the measuring cylinder 30. Of course, in other embodiments, the axial direction of the lead screw 532 can also be set at an angle to the axial direction of the measuring cylinder 30, for example, at an angle of 30°, 45°, etc. Comparatively, the arrangement where the axial direction of the lead screw 532 is parallel to the axial direction of the measuring cylinder 30 allows the second moving support 522 to move most quickly to a height position substantially level with the top of the powder in the measuring cylinder 30, improving experimental efficiency.

[0064] To make the process of the second movable support 522 driving the height measuring mechanism 60 to a height position that is basically level with the top of the powder in the measuring cylinder 30 more stable, such as... Figure 1As shown, in some embodiments, the second rail 53 further comprises a first guide structure 533, the extension direction of the first guide structure 533 being parallel to the axial direction of the screw rod 532, and the second moving bracket 522 is provided with a second guide structure 54 which is slidably connected to the first guide structure 533. In this way, through the mutual guide cooperation of the first guide structure 533 and the second guide structure 54, the movement of the second moving bracket 522 along the screw rod 532 is more stable, so as to accurately drive the height measuring mechanism 60 to move to a height position which is substantially level with the top of the powder in the measuring cylinder 30.

[0065] The first guide structure 533 can be a guide column, and the second guide structure 54 is a guide hole correspondingly. Alternatively, the first guide structure 533 can be a guide groove, and the second guide structure 54 is a guide protrusion which is slidably arranged in the guide groove.

[0066] In some embodiments, the height measuring mechanism 60 can only comprise an optical recognition system 61 which is used to detect and recognize the highest point and the lowest point of the top of the powder in the measuring cylinder 30, so as to correspondingly obtain the highest height h1 and the lowest height h2 of the top of the powder in the measuring cylinder 30, and thus the average height Δh of the powder in the measuring cylinder 30 can be obtained. The optical recognition system 61 can be a CCD camera system (i.e. Charge Coupled Device Camera System). The optical recognition system 61 moves along the circumference of the measuring cylinder 30 to circumferentially collect the images of the top of the powder, and correspondingly to the height scale on the measuring cylinder 30, the highest height h1 and the lowest height h2 of the top of the powder are recognized and determined, so that the average height Δh of the powder in the measuring cylinder 30 can be accurately obtained.

[0067] As shown, the height measuring mechanism 60 further comprises a third moving bracket 62 which is slidably arranged on the second rail 53, and the third moving bracket 62 is provided with a third guide structure 63 which is slidably connected to the second guide structure 54. Figure 5 and Figure 6As shown, in some embodiments, the second track 53 comprises a rack 534, one end of the rack 534 is fixedly installed on the first moving bracket 511, the second moving part 52 comprises a second motor 521, a second moving bracket 522 and a second gear 523, the second moving bracket 522 is movably connected to the rack 534, the second motor 521 is fixedly installed on the second moving bracket 522, the second gear 523 is rotatably installed on the second moving bracket 522, the rotating shaft of the second motor 521 is drivingly connected with the second gear 523, the second gear 523 is engaged with the rack 534, and the height measuring mechanism 60 is installed on the second moving bracket 522. After the test steps of weighing the powder and vibrating the powder are completed, the processor 70 first controls the second motor 521 to start to drive the second gear 523 to rotate, the second gear 523 is engaged with the rack 534 to drive, and then the second moving bracket 522 moves along the rack 534, that is, the second moving bracket 522 drives the height measuring mechanism 60 to move to a height position substantially level with the top of the powder in the measuring cylinder 30. Since the second gear 523 is engaged with the rack 534 to drive, it has a stable characteristic, thereby stably and accurately driving the height measuring mechanism 60 to move to a height position substantially level with the top of the powder in the measuring cylinder 30.

[0068] As Figure 5As shown, in some embodiments, the rack 534 includes a straight section 5341 and an arc section 5342 connected together. The extension direction of the straight section 5341 is parallel to the axial direction of the measuring cylinder 30, and the straight section 5341 is tangent to the arc section 5342. The end of the arc section 5342 away from the straight section 5341 is located directly above the measuring cylinder 30. After completing the test steps of weighing and compacting the powder, the processor 70 first controls the second motor 521 to start, thereby driving the second gear 523 to rotate. The second gear 523 meshes with the straight section 5341 for transmission. When the second moving bracket 522 drives the height measuring mechanism 60 to move along the straight section 5341 to the position where the straight section 5341 and the arc section 5342 are connected, the processor 70 controls the second motor 521 to stop rotating, so that the height measuring mechanism 60 is at a height position that is basically level with the top of the powder in the measuring cylinder 30. Then, the processor 70 controls the first motor 512 to start, driving the first gear 513 to rotate. The first gear 513 meshes with the gear ring 121, driving the first moving bracket 511 to move along the first track 12, which in turn drives the height measuring mechanism 60 to move circumferentially around the measuring cylinder 30. After the height measuring mechanism 60 moves circumferentially around the measuring cylinder 30 to collect an image of the top of the powder, the processor 70 then controls the second motor 521 to continue rotating, driving the second gear 523 to mesh with the arc segment 5342, until the second moving bracket 522 moves the height measuring mechanism 60 along the arc segment 5342 to directly above the measuring cylinder 30, so that the height measuring mechanism 60 collects an image of the top of the powder from top to bottom. In this way, the processor 70 combines the circumferentially collected image of the top of the powder with the top-down image of the top of the powder, thereby further accurately identifying and determining the highest height h1 and lowest height h2 of the powder, and can more accurately obtain the average height Δh of the powder in the measuring cylinder 30.

[0069] In some embodiments, such as Figure 6 As shown, in addition to the optical recognition system 61, the height measuring mechanism 60 may also include a laser ranging system 62. When the second moving bracket 522 moves to the end of the arc segment 5342 away from the straight segment 5341 (i.e., the laser ranging system 62 of the height measuring mechanism 60 is directly above the measuring cylinder 30), the laser ranging system 62 is used to detect the highest and lowest points of the powder in the measuring cylinder 30 from top to bottom. Then, the processor 70 combines the circumferentially acquired image of the top of the powder to accurately identify and determine the highest height h1 and lowest height h2 of the powder, thereby accurately obtaining the average height Δh of the powder in the measuring cylinder 30.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A powder tap density testing apparatus, characterized by, The powder tap density testing device comprises a test bench, a vibrating mechanism, a measuring cylinder, a moving mechanism and a height measuring mechanism. The test bench comprises a bench frame body and a first track, and the vibrating mechanism is mounted on the bench frame body. The measuring cylinder is mounted on the vibrating mechanism and is used to contain powder, and the measuring cylinder has a transparent cylinder wall. The moving mechanism comprises a first moving part, a second moving part and a second track, the first moving part is mounted on and movable along the first track, the second track is mounted on the first moving part, the second moving part is movably mounted on the second track, and the second moving part moves along the height direction of the measuring cylinder on at least part of the second track. The height measuring mechanism is mounted on the second moving part and is used to detect the height of the powder in the measuring cylinder.

2. The powder tap density testing device according to claim 1, wherein the powder tap density testing device further comprises a processor mounted on the bench frame body, and the vibrating mechanism, the first moving part, the second moving part and the height measuring mechanism are in communication connection with the processor.

3. The powder tap density testing device according to claim 1 or 2, wherein the powder tap density testing device further comprises a weighing mechanism mounted on the bench frame body, and the weighing mechanism is used to weigh the mass of the powder in the measuring cylinder.

4. The powder tap density testing device according to claim 3, wherein the weighing mechanism is fixedly mounted on the vibrating mechanism, and the measuring cylinder is fixedly mounted on the weighing mechanism.

5. The powder tap density testing device according to claim 3, wherein the vibrating mechanism comprises a vibrating part and a locking part connected to the vibrating part, the vibrating part is movably mounted on the bench frame body, and the locking part is used to lock the vibrating part and the bench frame body with each other; and the weighing mechanism comprises a jacking structure and a weighing collection structure, the jacking structure is mounted on the bench frame body, and the weighing collection structure is mounted on the jacking structure and located directly below the vibrating part.

6. The powder tap density testing device according to claim 1 or 2, wherein the first track is provided with a gear ring, the first moving part comprises a first moving bracket, a first motor and a first gear, the first moving bracket is movably mounted on the first track, the first motor is fixedly mounted on the first moving bracket, the first gear is rotatably mounted on the first moving bracket, the rotating shaft of the first motor is in driving connection with the first gear, and the first gear is in meshing connection with the gear ring.

7. The powder tap density testing device according to claim 6, wherein ​ ​ ​ ​ ​ ​ The second track comprises a mounting bracket and a lead screw, the mounting bracket is fixedly installed on the first moving bracket, the lead screw is rotatably installed on the mounting bracket, the second moving part comprises a second motor and a second moving bracket, the second motor is fixedly installed on the first moving bracket, the rotating shaft of the second motor is drivingly connected with the lead screw, the second moving bracket is provided with a threaded hole, the lead screw is arranged in the threaded hole and threadedly matched with the threaded hole, and the height measuring mechanism is installed on the second moving bracket.

8. The powder tap density testing device according to claim 7, wherein, an axis direction of the lead screw is parallel to an axis direction of the measuring cylinder.

9. The powder tap density testing device according to claim 7, wherein, the second track further comprises a first guide structure, an extension direction of the first guide structure is parallel to the axis direction of the lead screw, the second moving bracket is provided with a second guide structure, and the second guide structure is slidably connected with the first guide structure.

10. The powder tap density testing device according to claim 7, wherein, the height measuring mechanism comprises an optical recognition system, and the optical recognition system is used for detecting and recognizing the highest point and the lowest point of the top of the powder in the measuring cylinder.

11. The powder tap density testing device according to claim 7, wherein, the second track comprises a rack, one end of the rack is fixedly installed on the first moving bracket, the second moving part comprises a second motor, a second moving bracket and a second gear, the second moving bracket is movably connected with the rack, the second motor is fixedly installed on the second moving bracket, the second gear is rotatably installed on the second moving bracket, the rotating shaft of the second motor is drivingly connected with the second gear, the second gear is engaged with the rack, and the height measuring mechanism is installed on the second moving bracket.

12. The powder tap density testing device according to claim 11, wherein, the rack comprises a straight section and an arc section connected with each other, an extension direction of the straight section is parallel to an axis direction of the measuring cylinder, the straight section is tangent to the arc section, and one end of the arc section away from the straight section is located directly above the measuring cylinder.

13. The powder tap density testing device according to claim 12, wherein, the height measuring mechanism comprises an optical recognition system, and the optical recognition system is used for detecting and recognizing the highest point and the lowest point of the top of the powder in the measuring cylinder; and / or, the height measuring mechanism comprises a laser ranging system, when the second moving bracket moves to one end of the arc section away from the straight section, the laser ranging system is used for detecting the highest point and the lowest point of the top of the powder in the measuring cylinder.

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