Vibration molding device for granular materials

Abstract

The invention relates to the technical field of road soil test devices, and discloses a granular material vibration forming device which comprises a supporting frame, an upper vibration assembly and a lower vibration assembly, the upper vibration assembly and the lower vibration assembly are symmetrically arranged on the upper portion and the lower portion of the supporting frame, the lower vibration assembly comprises a mold base, a first vibration motor and a telescopic rod, and the telescopic rod is connected between the supporting frame and the mold base. The telescopic rod drives the mold base to move up and down, the first vibration motor is fixed to the supporting frame and connected with a first vibration rod, the upper end of the first vibration rod is fixed to the mold base, the first vibration motor drives the mold base to vibrate through the first vibration rod, and the mold is located between the mold base and the vibration end of the upper vibration assembly. The modulus of a structural layer under granular materials can be simulated within a certain range, and the method is more suitable for the actual situation.

Description

Technical Field

[0001] The invention relates to the technical field of road geotechnical testing devices, in particular to a vibration molding device for granular materials. Background Art

[0002] In the field of highway engineering construction, granular materials have a wide range of applications. They can provide uniform bearing capacity, increase the stability and durability of the road surface, and also have certain drainage performance. The application of granular materials helps to improve the performance and safety of highways. They are often used as the base layer and functional layer of the road surface, and are also suitable for the construction of highway shoulders and embankments. The forming methods of granular materials include static pressure forming, impact forming and vibration forming. Although impact forming can provide a tighter structure, it cannot guarantee the uniformity of forming and may crush the material, thereby affecting the accuracy of its grading. Although static pressure forming is recommended by the specification to compact the granular layer, according to the results of existing indoor tests, for unbonded granular materials, the mechanical properties of the specimens formed by vibration forming are better than those by static pressure forming. Therefore, it is particularly important to improve and innovate the equipment for indoor vibration forming of granular materials.

[0003] There are two main types of existing indoor vibration forming methods: surface vibration method and vibration table vibration method. The surface vibration method uses an upper vibration forming device, and common devices of this type include VTM (vertical vibration forming machine), etc. This type of device applies vibration force to the upper surface of the specimen, compacting the specimen from top to bottom to simulate the vibration of a vibrating roller; while the vibration table vibration method uses a lower vibration forming device, which is a commonly used vibration device indoors. This type of device applies vibration to the test bench carrying the specimen and then transmits it to the specimen. The forming process is a vibration from bottom to top. Compared with the surface vibration method, the vibration table vibration method is exactly the opposite of the compaction process of the roller, and according to existing experimental results, it is also shown that the surface vibration method is significantly better than the vibration table method in forming specimens.

[0004] A survey of existing upper-vibration vibration forming devices found that this type of device still has some limitations. Although the upper-vibration vibration forming device conforms to the force position of the construction scenario, in actual working conditions, the road structure layer environment that carries granular materials is very different from that during the experiment, resulting in deviations between the experimental process and the actual situation. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a vibration forming device for granular materials, which can simulate the modulus of the structural layer under the granular materials within a certain range and is more in line with the actual situation.

[0006] The present invention provides a vibration forming device for granular materials, comprising: a support frame and an upper vibration component and a lower vibration component symmetrically arranged on the upper part thereof, wherein the lower vibration component comprises: a mold base, a first vibration motor and a telescopic rod, the telescopic rod is connected between the support frame and the mold base, the telescopic rod drives the mold base to move up and down, the first vibration motor is fixed to the support frame, the first vibration motor is connected to a first vibration rod, the upper end of the first vibration rod is fixed to the mold base, the first vibration motor drives the mold base to vibrate through the first vibration rod, and the mold is located between the mold base and the vibration end of the upper vibration component.

[0007] Optionally, a mold slot is provided on one side of the mold base facing the upper vibration component, and the bottom of the mold is inserted into the mold slot so that the center line of the mold coincides with the first vibration rod.

[0008] Optionally, the mold base is also rotatably connected to a plurality of mold buckles, the rotation center of the mold buckles is located at the periphery of the mold slot, and the plurality of mold buckles are arrayed at the periphery of the mold slot, and the mold buckles can abut against the outer wall of the mold.

[0009] Optionally, the upper vibration component includes a linear displacement component and a second vibration motor connected in sequence from top to bottom, the linear displacement component drives the second vibration motor to move up and down, and the second vibration motor is connected to a second vibration rod.

[0010] Optionally, a vibration pressure head is connected to the bottom of the second vibration rod, and the lower end of the vibration pressure head abuts against the top of the mold.

[0011] Optionally, the linear displacement assembly includes a first gear fixed on the output shaft of the servo motor and a rack meshing with the first gear, the rack is vertically arranged, and the lower end of the rack is connected to the second vibration motor.

[0012] Optionally, the linear displacement assembly further includes two second gears arranged up and down, the rack is a double-sided rack, the second gear and the first gear are symmetrically arranged on both sides of the rack, and both are meshed with the rack for transmission.

[0013] Optionally, the support frame includes an upper base, a lower base and a fixed suspension supported therebetween, the upper base is provided with a guide hole for the rack to pass through, the fixed suspension is also movably connected to a lower vibration assembly fixing plate, and the first vibration motor and the telescopic rod are both fixed to the upper end of the lower vibration assembly fixing plate.

[0014] Optionally, the support frame also includes a support frame, in which a second vibration motor is fixed, the lower end of the rack passes through the top of the support frame and is fixed to the top of the second vibration motor, and the second vibration rod passes through the bottom of the support frame.

[0015] Optionally, both the first vibration motor and the second vibration motor are connected to a detection element, and the detection element is used to detect the displacement of the first vibration rod and the second vibration rod.

[0016] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art: A vibration forming device for granular materials provided by an embodiment of the present invention optimizes the upper vibration forming device by combining an upper vibration component and a lower vibration component. The two work together to achieve higher forming efficiency. Graded gravel materials are generally used as a base layer or a functional layer, and the elastic modulus of the lower supporting layer thereof is different. The first vibration motor and the telescopic rod cooperate to simulate the structural layer modulus under the granular material within a certain range, that is, different lower supporting layer moduli, which can be more in line with the vibration forming process in the actual construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A direct view and perspective view of a granular material vibration forming device provided by an embodiment of the present invention; Figure 2 A front view of a granular material vibration forming device provided by an embodiment of the present invention; Figure 3 A mold base provided by an embodiment of the present invention; Figure 4 A lower vibration system and a test piece mold provided in an embodiment of the present invention; Figure 5 The present invention provides an upward vibration system.

[0018] Description of reference numerals: 1. Upper vibration assembly; 2. Mold; 3. Lower vibration assembly; 4. Second gear; 5. Servo motor; 6. Second vibration motor; 7. Second vibration rod; 8. Vibration pressure head; 9. Mold base; 10. First vibration motor; 11. Telescopic rod; 12. First vibration rod; 13. Mold buckle; 14. Mold slot; 15. Mold base chamfer; 16. Pneumatic rod fixing rivet; 17. First gear; 18. Fixed suspension; 19. Upper vibration assembly fixing plate; 20. Lower vibration assembly fixing plate; 21. Lower base; 22. Rack; 23. Upper base. DETAILED DESCRIPTION

[0019] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0020] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] A survey of existing upper-vibration vibration forming devices found that this type of device still has some limitations. Although the upper-vibration vibration forming device conforms to the force position of the construction scenario, in actual working conditions, the road structure layer environment that carries granular materials is very different from that during the experiment. The influence of the rigid environment in the laboratory on the forming quality of granular materials has not been considered. At the same time, in order to ensure the quality of forming, the vibration device of this type of device needs to provide sufficient vibration force, so the part that provides vibration is often relatively large.

[0022] To this end, an embodiment of the present invention provides a vibration molding device for granular materials, which can simulate the modulus of the structural layer under the granular materials within a certain range and is more in line with the actual situation.

[0023] At least one embodiment of the present invention provides a vibration forming device for granular materials, comprising: a support frame and an upper vibration assembly and a lower vibration assembly symmetrically arranged on the upper part thereof, wherein the lower vibration assembly comprises: a mold base, a first vibration motor and a telescopic rod, the telescopic rod is connected between the support frame and the mold base, the telescopic rod drives the mold base to move up and down, the first vibration motor is fixed to the support frame, the first vibration motor is connected to a first vibration rod, the upper end of the first vibration rod is fixed to the mold base, the first vibration motor drives the mold base to vibrate through the first vibration rod, and the mold is located between the mold base and the vibration end of the upper vibration assembly.

[0024] In the granular material vibration forming device provided by the above embodiment of the present invention, the first vibration motor and the telescopic rod cooperate to simulate the structural layer modulus of the granular material, that is, different lower supporting layer moduli within a certain range.

[0025] The present invention is described below by several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.

[0026] refer to Figure 1 and Figure 2 , Figure 1 A direct view and perspective view of a granular material vibration forming device provided by an embodiment of the present invention, Figure 2 A front view of a granular material vibration forming device provided by an embodiment of the present invention, such as Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a vibration forming device for granular materials, comprising: a support frame and an upper vibration component 1 and a lower vibration component 3 symmetrically arranged on the upper part thereof, the support frame is the basic structure of the entire device, and is used to fix and support the upper vibration component 1 and the lower vibration component 3 to ensure the stability and rigidity of the device during the vibration process, the upper vibration component 1 generally comprises a second vibration motor, a second vibration rod and a vibration end, the second vibration motor provides a vibration force, and transmits the vibration to the vibration end through the second vibration rod, the vibration end directly acts on the upper part of the mold 2, and cooperates with the lower vibration component 3 to achieve bidirectional vibration compaction of the granular materials, wherein the lower vibration component 3 comprises: a mold base 9, a first vibration motor 10 and a telescopic rod 11, the mold base 9 is used to place the mold 2, the mold base 9 has a mold base chamfer 15, and the granular materials therein are evenly distributed and compacted by vibration, the first vibration motor 10 transmits the vibration force to the mold base 9 through the first vibration rod 12, the telescopic rod 11 is connected between the support frame and the mold base 9, the telescopic rod 11 drives the mold base 9 to move up and down, and the telescopic rod 11 is connected It is connected between the support frame and the mold base 9. Its main function is to adjust the height of the mold base 9. At the same time, it can also simulate different lower structure moduli by adjusting its stiffness and damping characteristics. The telescopic rod 11 can be designed as a hydraulic, pneumatic or mechanical spiral structure. By adjusting the pressure or length inside it, its support stiffness for the mold base 9 can be changed. The first vibration motor 10 is fixed to the support frame. The first vibration motor 10 is connected to the first vibration rod 12. The upper end of the first vibration rod 12 is fixed to the mold base 9. The first vibration motor 10 is connected to the mold base 9 through the first vibration rod 1 2 drives the mold base 9 to vibrate, and the mold 2 is located between the mold base 9 and the vibrating end of the upper vibration assembly 1. When the rigidity of the telescopic rod 11 is high, the vibration response of the mold base 9 is small, simulating a high modulus underlying layer (such as hard rock or concrete foundation). When the rigidity of the telescopic rod 11 is low, the vibration response of the mold base 9 is large, simulating a low modulus underlying layer (such as soft soil or loose sand layer). In this embodiment, the telescopic rod 11 selects four gas pressure rods and is respectively located around the mold base 9. The top is fixed to the mold base 9 by gas pressure rod fixing rivets 16.

[0027] A vibration forming device for granular materials provided by an embodiment of the present invention optimizes the upper vibration forming device by combining an upper vibration component and a lower vibration component. The two work together to have a higher forming efficiency. The graded gravel material is generally used as a base layer or a functional layer, and the elastic modulus of its lower bearing layer is different. The first vibration motor and the telescopic rod can simulate the structural layer modulus under the material within a certain range, that is, different lower bearing layer moduli, which can be more in line with the vibration forming process in the actual construction process. By adjusting the vibration parameters (frequency, amplitude) of the first vibration motor and the stiffness of the telescopic rod, the influence of different lower bearing layer moduli on the forming process of granular materials can be simulated. For example, under the condition of a high modulus lower bearing layer, the vibration energy is more easily transferred to the granular material, and the material is more easily compacted. Under the condition of a low modulus lower bearing layer, the vibration energy will be partially absorbed, and the compaction effect of the material is relatively weak. At the same time, because the vibration of the mold base has the characteristics of the lower vibration component, the combination of upper and lower vibrations makes the forming efficiency of granular materials higher, so the vibration force provided by the required vibration device is also smaller.

[0028] refer to Figure 3 , Figure 3 The mold base provided by the embodiment of the present invention is as follows: Figure 3 As shown, a mold slot 14 is provided on the side of the mold base 9 facing the upper vibration component 1. The mold slot 14 is a precisely machined groove, the shape of which matches the bottom of the mold 2, and is usually rectangular, circular or other geometric shapes to ensure that the mold 2 can be firmly inserted. The bottom of the mold 2 is plugged into the mold slot 14 so that the center line of the mold 2 coincides with the first vibration rod 12. The main function of the mold slot 14 is to accurately position the mold 2 to ensure that the center line of the mold 2 coincides with the center line of the first vibration rod 12. This centering design can avoid the displacement or tilt of the mold 2 during the vibration process and ensure the uniform transmission of the vibration force. The mold slot 14 fixes the mold 2 on the mold base 9 through a tight fit or additional fixing devices (such as bolts, buckles) to prevent the mold 2 from loosening or falling off during the vibration process.

[0029] The center line of the mold 2 coincides with the center line of the first vibration rod 12, which can ensure that the vibration force is evenly transmitted to all parts of the mold 2 and avoid uneven material distribution or molding defects caused by eccentric vibration. The centering design can reduce the loss of vibration energy, improve the efficiency and quality of vibration molding, avoid equipment wear or damage caused by eccentric vibration, and extend the service life of the vibration molding device.

[0030] refer to Figure 4 , Figure 4 The lower vibration system and the test piece mold provided by the embodiment of the present invention are as follows: Figure 4As shown, the mold base 9 is also rotatably connected with a plurality of mold buckles 13. The mold buckles 13 are usually made of high-strength, wear-resistant materials, such as alloy steel or special plastics, to withstand high-frequency impact and friction during vibration. The surface of the mold buckle 13 is polished or coated to reduce friction and wear and increase service life. The mold buckle 13 is connected to the mold base 9 through a rotating shaft or a hinge so that it can rotate around the rotation center. This design allows the mold buckle 13 to be flexibly opened or closed when needed, which is convenient for the installation and disassembly of the mold 2. The rotation center of the mold buckle 13 is located at the periphery of the mold slot 14, and a plurality of mold buckles 13 are arrayed at the periphery of the mold slot 14. The plurality of mold buckles 13 are evenly distributed at the periphery of the mold slot 14 to form an encirclement to ensure that the mold 2 is subjected to uniform fixing force in all directions. The mold buckle 13 can abut the outer wall of the mold 2. When the mold buckle 13 is closed, its end will tightly abut the outer wall of the mold 2 to form an additional fixing point to prevent the mold 2 from horizontal displacement or tilting during vibration.

[0031] The working process of the mold buckle 13: Install the mold 2: insert the bottom of the mold 2 into the mold slot 14 to ensure that the center line of the mold 2 coincides with the center line of the first vibration rod 12, and close the mold buckle 13: rotate the mold buckle 13 so that its end abuts against the outer wall of the mold 2 to form a stable fixation; Vibration molding: start the vibration motor, and the mold 2 is constrained by the mold buckle 13 during the vibration process to maintain stability and ensure uniform transmission of vibration force; Disassemble the mold 2: After the vibration molding is completed, open the mold buckle 13, take out the mold 2, and perform demolding and subsequent processing. The mold buckle 13 provides an additional fixing point to prevent the mold 2 from being displaced or loosened during the vibration process to ensure molding accuracy. The rotating connection design of the mold buckle 13 makes the installation and disassembly of the mold 2 more convenient and improves work efficiency. The mold buckle 13 can be adjusted according to the shape and size of the mold 2, and is suitable for a variety of different types of molds. By evenly distributing the mold buckles 13, the friction and wear of the mold 2 during the vibration process is reduced, thereby extending the service life of the mold.

[0032] Reference again Figure 1The upper vibration component 1 includes a linear displacement component and a second vibration motor 6 connected in sequence from top to bottom. The linear displacement component is usually composed of a motor-driven lead screw, a guide rail, a slider or a hydraulic / pneumatic cylinder and other components, which can achieve precise linear motion. The main function of the linear displacement component is to drive the second vibration motor 6 to move up and down, thereby adjusting the pressure between the vibration end and the mold 2. By controlling the movement of the linear displacement component, the load applied to the mold 2 can be accurately adjusted. The linear displacement component drives the second vibration motor 6 to move up and down. The second vibration motor 6 is connected to a second vibration rod 7. The second vibration motor 6 transmits the vibration force to the upper part of the mold 2 through the second vibration rod 7, and cooperates with the lower vibration component 3 to achieve bidirectional vibration compaction of granular materials. In addition to the vibration effect, the second vibration motor 6 also applies an additional downward load through the linear displacement component to further increase the material density in the mold 2. The load is transferred to the second vibration motor 6 through the linear displacement component in the upper vibration component 1. In addition to the actual vibration effect of the second vibration motor 6, the linear displacement component can be used to make the second vibration motor 6 have a downward load in addition to its own gravity during the vibration process.

[0033] Working process: the linear displacement component lifts the second vibration motor 6 to the initial position, ready for vibration molding; the linear displacement component drives the second vibration motor 6 to move downward, applying an additional load to the mold 2; the second vibration motor 6 is started, and the vibration force is transmitted to the upper part of the mold 2 through the second vibration rod 7, and cooperates with the lower vibration component 3 to achieve bidirectional vibration compaction of granular materials; after the vibration molding is completed, the linear displacement component lifts the second vibration motor 6, removes the mold 2, and performs demoulding and subsequent processing. The synergistic effect of bidirectional vibration and additional load improves the efficiency and quality of vibration molding. The design of the linear displacement component enables the upper vibration component 1 to adapt to the molding of materials of different thicknesses and types.

[0034] refer to Figure 5 , Figure 5 The vibration system provided by the embodiment of the present invention is as follows: Figure 5 As shown, a vibration pressure head 8 is connected to the bottom of the second vibration rod 7, and the lower end of the vibration pressure head 8 abuts the top of the mold 2. The vibration pressure head 8 directly participates in the vibration compaction process of the granular material in the mold 2. The vibration pressure head 8 not only transmits the vibration force, but also ensures that the vibration energy is evenly distributed to the material through contact with the top of the mold 2, thereby improving the molding quality and efficiency. The vibration pressure head 8 is usually made of high-strength, wear-resistant materials (such as alloy steel or special ceramics), and its shape and size match the top of the mold 2 to ensure close contact. The design of the vibration pressure head 8 ensures that the vibration force is evenly distributed to the entire top surface of the mold 2 to avoid excessive or insufficient local pressure, thereby improving the consistency of molding. Through close contact with the top of the mold 2, the vibration pressure head 8 applies additional pressure during the vibration process to further increase the density of the material.

[0035] The lower end of the vibration pressure head 8 is in close contact with the top of the mold 2 to ensure that the vibration energy is efficiently transmitted to the material in the mold 2. The contact pressure between the vibration pressure head 8 and the top of the mold 2 can be controlled by adjusting the position of the second vibration motor 6 through the linear displacement component to adapt to the molding requirements of different materials. The working process of the vibration pressure head 8 is as follows: the linear displacement component drives the second vibration motor 6 to move downward, so that the vibration pressure head 8 is in close contact with the top of the mold 2; start the second vibration motor 6, the vibration pressure head 8 transmits the vibration force to the top of the mold 2, so that the granular material in the mold 2 is vibrated and compacted; after the vibration molding is completed, the linear displacement component drives the second vibration motor 6 to move upward, the vibration pressure head 8 is separated from the top of the mold 2, and the mold 2 is taken out for subsequent processing.

[0036] Reference again Figure 2 The linear displacement assembly includes a first gear 17 fixed to the output shaft of the servo motor 5 and a rack 22 meshing with the first gear 17. The servo motor 5 serves as the power source of the linear displacement assembly and provides precise rotational motion. The servo motor 5 has the characteristics of high precision and high response, and can accurately control the rotation angle and speed of the first gear 17, thereby achieving precise control of the linear displacement of the rack 22, and can more accurately and stably control the load intensity. The first gear 17 is usually made of high-strength, wear-resistant materials (such as alloy steel) to ensure the stability and durability of the transmission. The first gear 17 transmits the rotational motion of the servo motor 5. The rack 22 is passed to drive the rack 22 to perform linear motion. The rack 22 is vertically arranged, and the lower end of the rack 22 is connected to the second vibration motor 6. The tooth shape of the rack 22 matches the first gear 17. It is usually made of high-strength, wear-resistant material to ensure the stability and durability of the transmission. The rack 22 converts the rotational motion into linear motion by meshing with the first gear 17, driving the second vibration motor 6 to move up and down. Through the gear-rack transmission mechanism, the rotational motion of the servo motor 5 is converted into the linear motion of the rack 22, thereby accurately controlling the up and down movement of the second vibration motor 6 to achieve the adjustment of the pressure on the top of the mold 2.

[0037] Through the servo motor 5 and the gear-rack transmission mechanism, precise control of the displacement of the second vibration motor 6 is achieved to meet the molding requirements of different materials. The gear-rack transmission mechanism has high rigidity and high stability to ensure stable operation during the vibration process. The gear-rack transmission mechanism has high transmission efficiency and can efficiently convert the rotational motion of the servo motor 5 into linear motion. The programmable control of the servo motor 5 enables the linear displacement component to adapt to the molding of materials of different thicknesses and types, and can also adjust the pressure on the top of the mold 2.

[0038] Specifically, the linear displacement assembly also includes two second gears 4 arranged vertically, and the rack 22 is a double-sided rack, that is, a toothed structure is provided on both sides thereof, which can mesh with the first gear 17 and the second gear 4 at the same time. The double-sided rack 22 significantly improves the stability of the transmission by meshing with the gears on both sides, and avoids the unbalanced load or vibration that may be caused by one-sided meshing. The design of the double-sided rack 22 enables the load to be evenly distributed on the gears on both sides, thereby improving the carrying capacity of the linear displacement assembly, which is suitable for high-load vibration molding scenarios, and the double-sided meshing design disperses the friction in the transmission process. The friction is reduced, the wear of the gear and the rack is reduced, and the service life is extended. The second gear 4 and the first gear 17 are symmetrically arranged on both sides of the rack 22. The two second gears 4 are arranged up and down and are symmetrically arranged on both sides of the rack 22 with the first gear 17 to form a multi-point meshing transmission. The second gear 4 and the first gear 17 work together to ensure that the rack 22 maintains linearity during movement and avoids deviation or jamming caused by single-point meshing. The second gear 4 and the first gear 17 share the load of the rack 22 together, which improves the reliability and stability of the transmission, and both are meshed with the rack 22 for transmission.

[0039] Through the symmetrical arrangement of the first gear 17 and the second gear 4, the rack 22 is evenly stressed during the movement, avoiding vibration or unbalanced load that may be caused by one-sided meshing. The multi-gear transmission design enables the load to be evenly distributed on multiple gears, thereby improving the carrying capacity of the linear displacement component and being suitable for high-load vibration molding scenarios. The multi-point meshing transmission ensures the linear motion accuracy of the rack 22 and avoids motion errors caused by single-point meshing. The multi-gear transmission disperses the friction, reduces the wear of the gears and racks, and extends the service life.

[0040] Reference again Figure 1 and Figure 2The support frame provided by the embodiment of the present invention includes an upper base 23, a lower base 21 and a fixed suspension 18 supported therebetween. The upper base 23 is provided with a guide hole for the rack 22 to pass through. The upper base 23, as the top structure of the support frame, is mainly used to fix the linear displacement component (such as the servo motor 5, the first gear 17, etc.) and provide guidance for the rack 22. The upper base 23 is provided with a guide hole, and the rack 22 passes through the hole to ensure that the rack 22 remains vertical and stable during the up and down movement to avoid deviation or shaking. The lower base 21, as the bottom structure of the support frame, is mainly used to support the weight of the entire device and provide an installation foundation for the lower vibration component 3. The lower base 21 is usually designed as a wide and heavy structure to enhance the overall stability of the device and reduce shaking during vibration. The fixed suspension 18 connects the upper base 23 and the lower base 21 to form a support frame. The main structure of the present invention provides an installation position for the lower vibration component fixing plate 20. The fixed suspension 18 is usually made of high-strength material to ensure that it will not deform or break during the vibration process. The fixed suspension 18 is also movably connected to the lower vibration component fixing plate 20. The first vibration motor 10 and the telescopic rod 11 are both fixed to the upper end of the lower vibration component fixing plate 20. The lower vibration component fixing plate 20 is fixed to the fixed suspension 18 by a movable connection method (such as a hinged or sliding connection), so that it can adjust its position within a certain range to meet the installation requirements of different molds 2. The first vibration motor 10 and the telescopic rod 11 are both fixed to the upper end of the lower vibration component fixing plate 20 to ensure the stability and centering of the lower vibration component 3 during the vibration process. By adjusting the position of the lower vibration component fixing plate 20, the height and angle of the lower vibration component 3 can be fine-tuned to ensure that the mold 2 is aligned with the vibration pressure head 8 of the upper vibration component 1.

[0041] The support frame provides a stable support structure and precise centering performance for the vibration forming device through the rigid connection of the upper base 23, the lower base 21 and the fixed suspension 18, as well as the design of the guide hole and the lower vibration component fixing plate 20. This design not only improves the stability and operating efficiency of the equipment, but also enhances the adjustment flexibility.

[0042] Specifically, the support frame also includes a support frame, which is usually made of high-strength material (such as alloy steel or aluminum alloy) and has sufficient rigidity and strength to withstand high-frequency impact and loads during the vibration process. A mounting seat is provided inside the support frame, and a second vibration motor 6 is fixed inside the support frame for fixing the second vibration motor 6 to ensure that it remains stable during the vibration process. The lower end of the rack 22 passes through the top of the support frame and is fixed to the top of the second vibration motor 6 to ensure that the rack 22 remains vertical and stable during the up and down movement. A guide hole is provided at the bottom of the support frame, and the second vibration rod 7 passes through the hole to ensure that it remains centered and stable during the vibration process. The upper end of the support frame is fixed to the lower end of the rack 22. The second vibration rod 7 passes through the bottom of the support frame, and the upper end of the support frame is fixed to the lower end of the rack 22 by bolts or welding to ensure that the two move synchronously during the vibration process. The fixed connection between the support frame and the rack 22 enhances the stability of the overall structure and reduces the deviation or shaking during the vibration process.

[0043] As an important component of the support frame, the support frame significantly enhances the structural stability and functionality of the vibration forming device through the fixed connection with the rack 22 and the support and guidance of the second vibration motor 6 and the second vibration rod 7. This design not only improves the stability and operating efficiency of the equipment, but also enhances the accuracy and consistency of vibration forming.

[0044] Optionally, both the first vibration motor 10 and the second vibration motor 6 are connected to detection elements, and the detection elements are used to detect the displacement of the first vibration rod 12 and the second vibration rod 7 .

[0045] The first vibration motor 10 is provided with a displacement sensor to monitor the position of the mold base 9. The second vibration motor 6 is provided with a displacement sensor and a torque sensor to monitor the position of the second vibration rod 7. Combined with the up and down displacement, the height of the specimen during the vibration molding process is monitored, and the density of the specimen is further roughly calculated.

[0046] The method for conducting an experiment using the granular material vibration forming device provided by the embodiment of the present invention comprises the following steps: (1) Weigh the mass of mold 2, put the granular material into the mold and basically level it, and weigh the mass of the test piece plus the mold; (2) The position of the second vibration rod 7 is raised by the servo motor 5, the mold 2 is placed on the mold base 9, and the mold 2 is fixed by rotating the mold buckle 13 and the mold slot 14; (3) Adjust the strength of the upper vibration servo motor 5 (torque is monitored by a sensor to monitor force) and the telescopic rod 11, and press the second vibration rod 7 down to the surface of the material to generate a stable load preload. At this time, the position of the second vibration rod 7 and the position of the mold base 9 are converted into the specimen height and recorded in the computer. The initial specimen density is obtained by combining the specimen height, mass and radius; (4) The load parameters are dynamically adjusted by the servo motor 5, the device is started, and the height of the second vibration rod 7 reaching the maximum displacement of the fall and the height of the mold base 9 are recorded by the sensor of the second vibration motor 6 to obtain the height of the specimen, thereby obtaining the density change curve of the specimen during the loading process; (5) When the density of the specimen reaches a stable value, set the program to stop the loading process and output the upper and lower vibration loading parameters, loading time, density change curve and other information in a table; (6) The servo motor 5 lifts the second vibration rod 7 through the first gear 17 and the second gear 4, rotates the mold buckle 13, takes out the test piece, and completes the vibration molding process.

[0047] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A vibration forming device for granular materials, characterized in that: include: A support frame and an upper vibration assembly (1) and a lower vibration assembly (3) symmetrically arranged on the upper portion of the support frame; wherein: The lower vibration component (3) comprises: a mold base (9), a first vibration motor (10) and a telescopic rod (11); the telescopic rod (11) is connected between a support frame and the mold base (9); the telescopic rod (11) drives the mold base (9) to move up and down; the first vibration motor (10) is fixed to the support frame; the first vibration motor (10) is connected to a first vibration rod (12); the upper end of the first vibration rod (12) is fixed to the mold base (9); the first vibration motor (10) drives the mold base (9) to vibrate via the first vibration rod (12); and the mold (2) is located between the mold base (9) and the vibration end of the upper vibration component (1).

2. The granular material vibration forming device according to claim 1, characterized in that: A mold slot (14) is provided on a side of the mold base (9) facing the upper vibration component (1), and the bottom of the mold (2) is inserted into the mold slot (14) so ​​that the center line of the mold (2) coincides with the first vibration rod (12).

3. The granular material vibration forming device according to claim 2, characterized in that: The mold base (9) is also rotatably connected to a plurality of mold buckles (13), the rotation center of the mold buckle (13) is located at the periphery of the mold clamping groove (14), and the plurality of mold buckles (13) are arrayed at the periphery of the mold clamping groove (14), and the mold buckles (13) are capable of abutting against the outer wall of the mold (2).

4. The granular material vibration forming device according to claim 1, characterized in that: The upper vibration component (1) comprises a linear displacement component and a second vibration motor (6) connected in sequence from top to bottom, the linear displacement component drives the second vibration motor (6) to move up and down, and the second vibration motor (6) is connected to a second vibration rod (7).

5. The granular material vibration forming device according to claim 4, characterized in that: The bottom of the second vibration rod (7) is connected to a vibration pressure head (8), and the lower end of the vibration pressure head (8) abuts against the top of the mold (2).

6. The granular material vibration forming device according to claim 4, characterized in that: The linear displacement assembly comprises a first gear (17) fixed on an output shaft of a servo motor (5) and a rack (22) meshing with the first gear (17); the rack (22) is arranged vertically, and the lower end of the rack (22) is connected to a second vibration motor (6).

7. The granular material vibration forming device according to claim 6, characterized in that: The linear displacement assembly further comprises two second gears (4) arranged vertically, the rack (22) being a double-sided rack, the second gear (4) and the first gear (17) being symmetrically arranged on both sides of the rack (22), and both meshingly transmitting with the rack (22).

8. The granular material vibration forming device according to claim 6, characterized in that: The support frame comprises an upper base (23), a lower base (21) and a fixed suspension frame (18) supported therebetween, the upper base (23) being provided with a guide hole for allowing the rack (22) to pass through, the fixed suspension frame (18) being movably connected to a lower vibration assembly fixing plate (20), the first vibration motor (10) and the telescopic rod (11) being fixed to the upper end of the lower vibration assembly fixing plate (20).

9. The granular material vibration forming device according to claim 8, characterized in that: The support frame also includes a support frame, in which the second vibration motor (6) is fixed, the lower end of the rack (22) passes through the top of the support frame and is fixed to the top of the second vibration motor (6), and the second vibration rod (7) passes through the bottom of the support frame.

10. The granular material vibration forming device according to claim 4, characterized in that: The first vibration motor (10) and the second vibration motor (6) are both connected to a detection element, and the detection element is used to detect the displacement of the first vibration rod (12) and the second vibration rod (7).

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