Powder forming hydraulic equipment with adaptive pressure regulation function

Abstract

The present invention relates to the technical field of powder pressing and forming, and in particular to a powder forming hydraulic equipment with an adaptive pressure regulating function, comprising a vertical plate, a horizontal plate, a positioning cylinder, an extrusion plate, a pressing die, a hydraulic pump and an adjusting device; the present invention can solve the following problems existing in the prior art in the process of pressing and forming powder: the pressure applied to the powder cannot be adjusted, which has limitations and affects the pressing and forming effect; the powder cannot be spread flat, so that the powder raw material in the lower die forming device cannot be evenly distributed, and defects are prone to occur during the pressing process; the present invention can adaptively adjust the pressure according to powder raw materials of different materials and different forming requirements, and can be used in powder forming with a variety of different pressures, thereby improving the adaptability of the present invention; the present invention can evenly spread the metal powder by vibration, so that the metal powder is more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing.

Description

Technical Field

[0001] The invention relates to the technical field of powder pressing and forming, and in particular to a powder forming hydraulic device with a self-adaptive pressure regulating function. Background Art

[0002] Powder hydraulic forming is a manufacturing process that uses hydraulic equipment to press powder of metal, ceramic or other materials into a predetermined shape under high pressure. This technology is widely used in the production of high-precision and complex-shaped parts. The hydraulic press applies high pressure to the powder raw material in the mold, and the pressure directly affects the density and strength of the finished product.

[0003] However, there are usually some problems when the current hydraulic equipment is used to press and mold powder. With the development of science and technology, technicians in related fields have also made a lot of optimizations on the equipment for powder pressing and molding. In order to make a more accurate comparison, a Chinese patent with publication number CN114148023A discloses a powder pressing and molding equipment, including a mounting frame, a fixed mold frame device is fixed on the mounting frame, an upper mold molding device and a lower mold molding device are arranged on both sides of the fixed mold frame device, an upper mold driving mechanism connected to the upper mold molding device for driving it to slide relative to the fixed mold frame device, and a lower mold driving mechanism connected to the lower mold molding device for driving it to slide relative to the fixed mold frame device.

[0004] When in use, the lower mold forming device is driven upward by the lower mold driving mechanism. After the lower mold forming device is loaded with powder, the upper mold driving mechanism drives the upper mold forming device downward, and then the upper mold forming device, the fixed mold frame device and the lower mold forming device cooperate to dry-press the powder into a molded product.

[0005] However, there are still some shortcomings in the process of pressing powder in the above-mentioned prior art: 1. Although the powder can be pressed and molded by the upper mold molding device and the lower mold molding device, different materials of powder raw materials require different pressures during the pressing process. Therefore, it is necessary to adaptively adjust the pressure of the powder raw materials. The above-mentioned prior art cannot adjust the pressure applied to the powder. Not only can it not quickly adjust the pressure according to the molding requirements, but it can also not be used for the pressing and molding of powders of different materials. There are limitations, and it is impossible to ensure the density and strength of the powder after molding, which affects the pressing and molding effect.

[0006] 2. Since the powder cannot be flattened during the powder loading process of the lower die molding device, the powder thickness in the lower die molding device cannot be ensured to be consistent, so that the powder raw materials cannot be evenly distributed, which can easily lead to defects in the positions with smaller powder thickness during the pressing process. It is difficult to ensure the compactness and strength of the powder after pressing, which further affects the pressing and molding effect.

[0007] Therefore, under the above-stated viewpoint, the existing powder pressing segmentation still has room for improvement. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a powder forming hydraulic equipment with adaptive pressure regulation function, including two vertical plates parallel to each other, a horizontal plate is commonly installed on the upper ends of the two vertical plates, a positioning cylinder is arranged at the lower end of the horizontal plate, a piston pad is slidably arranged inside the positioning cylinder, a push rod sliding through the positioning cylinder is installed at the lower end of the piston pad, an extrusion plate is installed at the lower end of the push rod, a pressing mold is installed between the two vertical plates, and a receiving hopper located below the pressing mold is installed between the two vertical plates.

[0009] An oil inlet is provided between the upper end of the positioning cylinder and the horizontal plate, a hydraulic pump is provided at the upper end of the horizontal plate, an oil inlet pipe is connected between the output end of the hydraulic pump and the oil inlet, an adjusting device for adjusting the pressure is installed between the positioning cylinder and the extrusion plate, the adjusting device includes a linkage column installed at the upper end of the extrusion plate, and a fixed plate slidably mounted on the outside of the linkage column is installed on the outer wall of the positioning cylinder.

[0010] As a preferred technical solution of the present invention, the adjusting device also includes a contact ring installed inside the fixed plate, an electrode ring matching the contact ring is installed on the linkage column, a signal receiver and a controller electrically connected are installed at the lower end of the horizontal plate, and the contact ring and the electrode ring are electrically connected to the signal receiver respectively.

[0011] As a preferred technical solution of the present invention, the adjustment device also includes a vertical slide groove provided inside the linkage column, a threaded rod is rotatably installed inside the vertical slide groove, a movable ring is sleeved on the outer wall of the threaded rod by a threaded connection, and the outer wall of the movable ring is connected to the electrode ring by a plurality of support rods; A gasket is installed after the upper end of the threaded rod passes through the linkage column, and a support spring sleeved on the outside of the threaded rod is installed between the gasket and the linkage column.

[0012] As a preferred technical solution of the present invention, a guide cylinder is installed inside the oil inlet, the lower end of the guide cylinder extends into the interior of the positioning cylinder, a mounting groove is opened at the top of the positioning cylinder, a driving motor is arranged in the mounting groove, a connecting block is sleeved at the bottom of the output shaft of the driving motor, a receiving plate located below the guide cylinder is installed on the side wall of the connecting block, and a sealing block is provided on the upper end of the receiving plate and slides against the bottom of the guide cylinder.

[0013] As a preferred technical solution of the present invention, any two mutually parallel outer walls of the pressing mold are installed with positioning shafts, the positioning shafts are rotatably installed on the vertical plates, and the two vertical plates are rotatably installed with linkage shafts located above the positioning shafts, the linkage shafts and the positioning shafts are connected by belt transmission, and a driving unit for controlling the rotation of the positioning shafts is installed between the vertical plates and the positioning shafts.

[0014] As a preferred technical solution of the present invention, the driving unit includes two guide bars installed on the upper end of the extrusion plate, and a sliding groove is provided on one side of the guide bar close to the vertical plate, and a driving rod is slidably arranged in the sliding groove; A rotating wheel is sleeved on the outer wall of the linkage shaft, and a through hole for slidingly passing the driving rod is opened on the vertical plate.

[0015] As a preferred technical solution of the present invention, the through hole consists of an arc segment and a vertical segment, wherein the arc segment of the through hole is located outside the rotating wheel, and the arc segment and the vertical segment of the through hole are connected.

[0016] As a preferred technical solution of the present invention, a plurality of annularly distributed clamping blocks are installed on the outer wall of the rotating wheel, and a receiving groove for slidingly engaging with the driving rod is formed between two adjacent clamping blocks.

[0017] As a preferred technical solution of the present invention, the guide bar is an L-shaped structure, and the horizontal section of the guide bar faces the arc section of the through hole, and the horizontal section of the guide bar is provided with a sliding groove connected to each other on the side close to the vertical section, and the driving rod is slidably docked in the sliding groove; A linkage plate located above the driving rod is slidably arranged in the vertical section of the sliding groove, the linkage plate and the driving rod are horizontally clamped, and a return spring is installed between the linkage plate and the top of the vertical section of the sliding groove.

[0018] As a preferred technical solution of the present invention, an auxiliary rod is installed on the side of the positioning shaft away from the pressing mold, and hemispherical interference blocks are installed on both ends of the auxiliary rod through elastic parts. Two stabilizing plates are symmetrically installed along the positioning shaft on the side of the vertical plate away from the pressing mold, and the two stabilizing plates are provided with grooves matching the interference blocks on the side close to the positioning shaft.

[0019] In summary, this application includes the following beneficial technical effects: 1. The present invention controls the piston pad to move the push rod and the extrusion plate downward through a hydraulic pump. The extrusion plate performs high-pressure pressing on the metal powder in the pressing mold. When the extrusion plate moves downward to extrude the metal powder and drives the electrode ring to come into contact with the contact ring, the controller controls the hydraulic pump to suspend oil supply, so that the piston pad drives the extrusion plate to be pressed down to the lowest position and no longer moves. In this way, the metal powder is pressed by the extrusion plate for a certain period of time, thereby enhancing the density and strength of the metal powder after molding and ensuring the pressing and molding effect of the metal powder.

[0020] 2. The present invention drives the electrode ring to move up or down and adjusts the initial distance between the electrode ring and the contact ring by rotating the threaded rod. When the initial distance increases, the downward distance of the extrusion plate increases accordingly, thereby increasing the pressure on the metal powder in the pressing mold; when the initial distance decreases, the downward distance of the extrusion plate decreases accordingly, so as to reduce the pressure on the metal powder. Therefore, the downward distance of the extrusion plate and the pressure on the metal powder can be adaptively adjusted according to powder raw materials of different materials and different molding requirements, and can be used in powder molding of various pressures, thereby improving the adaptability of the present invention.

[0021] 3. When the electrode ring and the contact ring come into contact with each other, the present invention controls the sealing block to abut against the bottom of the positioning cylinder to seal the positioning cylinder and disconnect the connection between the oil inlet pipe and the positioning cylinder to prevent the oil in the oil inlet pipe from entering the positioning cylinder through the oil inlet port, or the oil in the positioning cylinder from overflowing through the oil inlet port to affect the height of the extrusion plate and the pressure on the metal powder.

[0022] Fourth, when the extrusion plate of the present invention moves up and down, it can drive the pressing mold to reciprocate and flip 180 degrees through the cooperation of the driving rod, the rotating wheel, the linkage shaft and the positioning shaft. When the pressing mold flips upward, it is convenient for the extrusion plate to press and mold the metal powder, and when the pressing mold flips downward, the pressed workpiece can be poured into the receiving hopper and taken out, thereby realizing the reciprocating flipping of the pressing mold and the continuous pressing of the metal powder, thereby improving the pressing efficiency.

[0023] 5. The present invention can limit the positioning shaft and the pressing die through the mutual cooperation between the abutment block and the slot, preventing the positioning shaft from rotating randomly and affecting the position of the pressing die, thereby ensuring that the extrusion plate can always be accurately inserted into the pressing die to press the metal powder.

[0024] 6. After the present invention fills the metal powder into the pressing mold, the metal powder can be evenly spread on the supporting plate by controlling the vibration of the supporting plate, ensuring that the thickness of the metal powder after spreading is consistent, and the air in the metal powder can be removed by vibration, making the metal powder more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing, and the workpiece in the pressing mold can be quickly shaken off by vibration, which is convenient for quick material removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a schematic diagram of the internal structure between the horizontal plate and the positioning cylinder of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure among the horizontal plate, the positioning cylinder and the adjusting device of the present invention.

[0029] Figure 4 The present invention Figure 3 A partial enlarged view of point A.

[0030] Figure 5 The present invention Figure 3 A partial enlarged view of point B.

[0031] Figure 6 It is a structural schematic diagram of the drive unit of the present invention.

[0032] Figure 7 It is a schematic diagram of the structure among the driving rod, the rotating wheel, the through hole and the clamping block of the present invention.

[0033] Figure 8 The present invention Figure 6 A partial enlarged view of point C.

[0034] Fig. 9 It is a schematic diagram of the internal structure of the pressing mold of the present invention.

[0035] In the figure, 1, vertical plate; 2, horizontal plate; 3, positioning cylinder; 31, piston pad; 32, push rod; 33, extrusion plate; 34, guide cylinder; 35, driving motor; 36, connecting block; 37, receiving plate; 38, blocking block; 39, supporting spring; 4, pressing die; 41, positioning shaft; 411, auxiliary rod; 412, elastic member; 413, resistance block; 414, stabilizing plate; 42, linkage shaft; 43, driving unit; 431, guide strip; 432, sliding groove; 433, driving rod; 434, rotating wheel; 435, Through hole; 436, block; 437, linkage plate; 438, reset spring; 44, mesh frame; 45, contraction spring; 46, load-bearing plate; 47, rotating shaft; 48, positioning motor; 49, cam; 5, receiving hopper; 6, hydraulic pump; 61, oil inlet pipe; 7, adjusting device; 71, linkage column; 72, fixing plate; 73, contact ring; 74, electrode ring; 75, signal receiver; 76, controller; 77, vertical slide; 78, threaded rod; 79, moving ring; 80, support rod; 81, gasket; 82, support spring. DETAILED DESCRIPTION

[0036] The following combination Figure 1-Figure 9 Embodiments of the present invention are described in detail.

[0037] The embodiment of the present application discloses a powder forming hydraulic equipment with an adaptive pressure regulation function. It should be noted that the powder forming hydraulic equipment with an adaptive pressure regulation function of the present application is mainly used in the process of pressing and molding metal powder. In terms of technical effect, it can realize the reciprocating flipping of the pressing mold 4 and the continuous pressing of the metal powder, thereby improving the pressing efficiency; especially when pressing the metal powder, it can adjust the pressure on the metal powder, and maintain the pressure for a certain period of time after pressing, thereby enhancing the density and strength of the metal powder after molding, and ensuring the pressing and molding effect of the metal powder; further, the powder forming hydraulic equipment with an adaptive pressure regulation function of the present application can also spread the metal powder evenly in the pressing mold 4 by vibration, and can remove the air in the metal powder, so that the metal powder is more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing. Embodiment 1:

[0038] Reference Figure 1 and Figure 2 As shown, a powder forming hydraulic equipment with adaptive pressure regulation function includes two vertical plates 1 parallel to each other, a horizontal plate 2 is commonly installed on the upper ends of the two vertical plates 1, a positioning cylinder 3 is arranged at the lower end of the horizontal plate 2, a piston pad 31 is slidably arranged inside the positioning cylinder 3, a push rod 32 sliding through the positioning cylinder 3 is installed at the lower end of the piston pad 31, an extrusion plate 33 is installed at the lower end of the push rod 32, a pressing mold 4 is installed between the two vertical plates 1, and a receiving hopper 5 located below the pressing mold 4 is installed between the two vertical plates 1.

[0039] Furthermore, in this embodiment, an oil inlet is commonly provided between the upper end of the positioning cylinder 3 and the horizontal plate 2, a hydraulic pump 6 is provided at the upper end of the horizontal plate 2, an oil inlet pipe 61 is connected between the output end of the hydraulic pump 6 and the oil inlet, and an adjusting device 7 for adjusting the pressure is installed between the positioning cylinder 3 and the extrusion plate 33.

[0040] During the specific implementation process, first, a release agent is applied to the pressing mold 4, and then the powder raw material to be pressed is filled into the pressing mold 4, and then the hydraulic pump 6 is started. The hydraulic pump 6 inputs the hydraulic oil into the positioning cylinder 3 through the oil inlet pipe 61. The piston pad 31 can be pushed downward by increasing the oil pressure in the positioning cylinder 3, and the piston pad 31 drives the push rod 32 and the extrusion plate 33 to move downward as a whole, so that the extrusion plate 33 presses the metal powder in the pressing mold 4 into shape; in addition, before the metal powder is pressed, the pressure on the metal powder can be adjusted by the adjustment device 7, so that it can be adaptively adjusted according to the processing requirements.

[0041] Reference Figure 3 and Figure 4As shown, in order to facilitate the adjustment of pressure according to different processing requirements of metal powder, the pressure of metal powder can be adjusted in this embodiment. Specifically, the adjusting device 7 includes a linkage column 71 installed at the upper end of the extrusion plate 33, and the outer wall of the positioning cylinder 3 is installed with a fixed plate 72 slidably sleeved on the outside of the linkage column 71, and a connecting hole is opened on the fixed plate 72. The linkage column 71 passes through the connecting hole, and a contact ring 73 is installed in the connecting hole. An electrode ring 74 matching the contact ring 73 is installed on the linkage column 71, and a signal receiver 75 and a controller 76 connected electrically are installed at the lower end of the horizontal plate 2, and the contact ring 73 and the electrode ring 74 are respectively electrically connected to the signal receiver 75, and the hydraulic pump 6 and the controller 76 are electrically connected.

[0042] Furthermore, in the present embodiment, the adjusting device 7 also includes a vertical slide groove 77 provided inside the linkage column 71, a threaded rod 78 is rotatably installed inside the vertical slide groove 77, a movable ring 79 is sleeved on the outer wall of the threaded rod 78 by a threaded connection, the movable ring 79 is slidably arranged in the vertical slide groove 77, a plurality of annularly distributed limiting grooves connected to the vertical slide groove 77 are provided on the linkage column 71, a plurality of support rods 80 slidably docked in the limiting grooves are installed on the outer wall of the movable ring 79, and one end of the plurality of support rods 80 away from the movable ring 79 is commonly connected to the electrode ring 74; a gasket 81 is installed on the upper end of the threaded rod 78 after passing through the linkage column 71, and a support spring 82 sleeved on the outside of the threaded rod 78 is installed between the gasket 81 and the linkage column 71.

[0043] In the initial state, the push rod 32 is in a retracted state, that is, the extrusion plate 33 is in the highest position. At this time, the distance between the electrode ring 74 and the contact ring 73 driven by the linkage column 71 is the largest. Only when the extrusion plate 33 drives the linkage column 71 and the electrode ring 74 to move downward can the electrode ring 74 and the contact ring 73 come into contact. It should be noted that the downward movement distance of the electrode ring 74 is equal to the downward movement distance of the extrusion plate 33; in addition, the support spring 82 always applies an upward extension force to the gasket 81 and the threaded rod 78, thereby increasing the friction between the gasket 81 and the linkage column 71, so that the rotation of the threaded rod 78 is resisted, thereby ensuring that the threaded rod 78 will not rotate arbitrarily after rotation, thereby avoiding the movable ring 79 from moving arbitrarily and affecting the change in the initial distance between the electrode ring 74 and the contact ring 73.

[0044] It should be noted that the signal receiver 75 and the controller 76 used in this embodiment are both existing technologies, wherein the signal receiver 75 is used to receive the signal when the electrode ring 74 and the contact ring 73 are in contact, and the controller 76 is used to receive the signal of the signal receiver 75 and control the start and stop of the hydraulic pump 6, which will not be repeated here.

[0045] During the specific implementation process, firstly, the hydraulic pump 6 is powered on and started through the controller 76. When the hydraulic pump 6 controls the piston pad 31 to drive the push rod 32 and the extrusion plate 33 to move downward, the extrusion plate 33 drives the linkage column 71 and the electrode ring 74 to move downward synchronously, and the metal powder in the pressing mold 4 is pressed under high pressure through the extrusion plate 33. When the extrusion plate 33 moves downward to extrude the metal powder and drives the electrode ring 74 to contact the contact ring 73, a signal is transmitted to the signal receiver 75 through the electrode ring 74 and the contact ring 73, so that the signal receiver 75 transmits a signal to the controller 76. The controller 76 controls the hydraulic pump 6 to suspend the oil supply, so that the piston pad 31 cannot continue to move downward, so that the extrusion plate 33 is pressed down to the lowest position and no longer moves. In this way, the metal powder in the pressing mold 4 is pressed by the extrusion plate 33 and then maintained under pressure for a certain period of time, thereby enhancing the density and strength of the metal powder after forming, and ensuring the forming effect of the metal powder.

[0046] In addition, by rotating the threaded rod 78, the threaded rod 78 drives the movable ring 79, the support rod 80 and the electrode ring 74 to move up or down as a whole, so as to adjust the initial distance between the electrode ring 74 and the contact ring 73. When the initial distance between the electrode ring 74 and the contact ring 73 increases, the distance that the electrode ring 74 needs to move downward increases accordingly, that is, the downward distance of the extrusion plate 33 also increases, thereby increasing the pressure on the metal powder in the pressing mold 4; conversely, when the initial distance between the electrode ring 74 and the contact ring 73 decreases, the downward distance of the extrusion plate 33 decreases accordingly, so as to reduce the pressure on the metal powder, so that the downward pressing distance of the extrusion plate 33 and the pressure on the metal powder can be adaptively adjusted according to powder raw materials of different materials and different molding requirements, and can be used in powder molding with different pressures, thereby improving the adaptability of the present invention.

[0047] Reference Figure 5As shown, in order to ensure that the extrusion plate 33 does not move after it moves down to the lowest position, it is necessary to ensure that the hydraulic pump 6 no longer supplies oil to the positioning cylinder 3 or draws oil from the positioning cylinder 3. Therefore, in this embodiment, the oil inlet between the positioning cylinder 3 and the oil inlet pipe 61 can be adaptively closed and opened. Based on this, in this embodiment, a guide cylinder 34 is installed inside the oil inlet, the oil inlet pipe 61 is connected to the upper end of the guide cylinder 34, and the lower end of the guide cylinder 34 extends to the inside of the positioning cylinder 3. A mounting groove is opened on the top of the positioning cylinder 3, and a drive motor 35 is arranged in the mounting groove. The drive motor 35 is connected to the controller 7. 6 are electrically connected, a connecting block 36 is sleeved on the bottom of the output shaft of the drive motor 35, and a receiving plate 37 located below the guide cylinder 34 is installed on the side wall of the connecting block 36. A groove is opened on the upper end of the receiving plate 37, and a blocking block 38 is slidably arranged in the groove and slides against the bottom of the guide cylinder 34. A supporting spring 39 is installed between the lower end of the blocking block 38 and the groove; the supporting spring 39 has elastic force and always supports the blocking block 38 upward. In the initial state, the blocking block 38 and the guide cylinder 34 are staggered. At this time, the oil inlet pipe 61 and the positioning cylinder 3 are connected through the guide cylinder 34.

[0048] During the specific implementation process, when the electrode ring 74 and the contact ring 73 come into contact, the hydraulic pump 6 stops supplying oil. At this time, the controller 76 enables the drive motor 35 to be powered on and started. The drive motor 35 drives the receiving plate 37 to rotate through the connecting block 36, so that the receiving plate 37 drives the blocking block 38 to move to the bottom of the positioning cylinder 3, so that the blocking block 38 is abutted against the bottom of the positioning cylinder 3 under the action of the supporting spring 39, so as to facilitate the sealing treatment of the positioning cylinder 3, and can disconnect the connection between the oil inlet pipe 61 and the positioning cylinder 3, so as to prevent the oil in the oil inlet pipe 61 from entering the positioning cylinder 3 through the oil inlet, or the oil in the positioning cylinder 3 from overflowing through the oil inlet and affecting the height of the extrusion plate 33 and the pressure on the metal powder.

[0049] Reference Figure 6 and Figure 7 As shown, in order to improve the pressing efficiency of metal powder, in this embodiment, the pressing mold 4 can be turned over to facilitate the continuous pressing of metal powder. Based on this, in this embodiment, any two parallel outer walls of the pressing mold 4 are installed with positioning shafts 41, and the positioning shaft 41 is rotatably penetrated on the vertical plate 1. A linkage shaft 42 located above the positioning shaft 41 is rotatably installed on the two vertical plates 1. The linkage shaft 42 is located above the initial position of the extrusion plate 33. The linkage shaft 42 is connected to the positioning shaft 41 through a belt drive, and a driving unit 43 for controlling the rotation of the positioning shaft 41 is installed between the vertical plate 1 and the positioning shaft 41.

[0050] Furthermore, in the present embodiment, the driving unit 43 includes two guide bars 431 installed on the upper end of the extrusion plate 33, the two guide bars 431 are symmetrically distributed along the extrusion plate 33 and are respectively arranged opposite to the two vertical plates 1, a sliding groove 432 is provided on the side of the guide bar 431 close to the vertical plate 1, and a driving rod 433 is slidably arranged in the sliding groove 432; a rotating wheel 434 is sleeved on the outer wall of the linkage shaft 42, a connecting groove for accommodating the rotating wheel 434 is provided inside the vertical plate 1, and a through hole 435 for slidingly passing the driving rod 433 is provided on the vertical plate 1.

[0051] Furthermore, in order to ensure that the pressing mold 4 is turned over by the cooperation of the positioning shaft 41 and the linkage shaft 42, in the present embodiment, the through hole 435 is composed of an arc segment and a vertical segment, wherein the arc segment of the through hole 435 is located on the outside of the rotating wheel 434, and the through hole 435 is connected with the connecting groove, and the arc segment and the vertical segment of the through hole 435 are connected.

[0052] It should be noted that, in this embodiment, a plurality of annularly distributed blocks 436 are installed on the outer wall of the rotating wheel 434, and a receiving groove for sliding engagement with the driving rod 433 is formed between two adjacent blocks 436; in the initial state, the pressing mold 4 is flipped downward so that the pressing groove of the pressing mold 4 is arranged downward.

[0053] During the specific implementation process, when the extrusion plate 33 moves downward, it drives the guide bar 431 and the driving rod 433 to move downward synchronously. During the downward movement of the driving rod 433, it moves along the vertical section and the arc section of the through hole 435. During this period, the driving rod 433 is engaged in the accommodating groove and drives the rotating wheel 434 to rotate. After the driving rod 433 moves from the upper vertical section of the arc section to the lower vertical section, it can drive the rotating wheel 434 to rotate 180 degrees, so that the rotating wheel 434 drives the pressing mold 4 to rotate 180 degrees through the linkage shaft 42 and the positioning shaft 41, so that the pressing mold 4 can be flipped, and the pressing mold 4 remains in a vertical state after flipping; at the same time, the extrusion plate 33 is still located above the pressing mold 4, and then the hydraulic pump 6 is stopped from supplying oil through the controller 76, so that the extrusion plate 33 stops moving downward, which is convenient for applying the release agent in the pressing mold 4 and filling the metal powder raw material to be pressed.

[0054] Subsequently, the hydraulic pump 6 resumes oil supply, so that the extrusion plate 33 continues to move downward. At this time, the driving rod 433 moves downward along the vertical section on the lower side of the arc section, so that the pressing mold 4 maintains the angle after flipping, so that the extrusion plate 33 can press and mold the metal powder in the pressing mold 4; after the metal mold in the pressing mold 4 is pressed, the extrusion plate 33 drives the driving rod 433 to move up and reset. When the driving rod 433 passes through the arc section, it drives the rotating wheel 434 to rotate 180 degrees in the opposite direction. The rotating wheel 434 drives the pressing mold 4 to rotate synchronously in the opposite direction through the linkage shaft 42 and the positioning shaft 41, so that the workpiece pressed on the pressing mold 4 is flipped downward with the pressing mold 4, so that the pressed workpiece can be poured into the receiving hopper 5 and taken out.

[0055] By repeating the above steps, the reciprocating turning of the pressing die 4 and the continuous pressing of the metal powder can be achieved, thereby improving the pressing efficiency.

[0056] Continue to refer to Figure 6 As shown, since the extrusion plate 33 needs to enter the pressing mold 4 when it moves downward to press the metal powder, and the driving rod 433 is located outside the pressing mold 4, the driving rod 433 is likely to interfere with the downward movement of the extrusion plate 33. In order to avoid the occurrence of this problem, in the present embodiment, the guide bar 431 is an L-shaped structure, and the horizontal section of the guide bar 431 faces the arc section side of the through hole 435, and the horizontal section of the guide bar 431 is provided with a sliding groove 432 that is interconnected on the side close to the vertical section, and the driving rod 433 is slidably docked in the sliding groove 432; a linkage plate 437 located above the driving rod 433 is slidably provided in the vertical section of the sliding groove 432, and the linkage plate 437 and the driving rod 433 are slidably arranged 433 are horizontally clamped together, and a return spring 438 is installed between the linkage plate 437 and the top of the vertical section of the sliding groove 432. The return spring 438 can apply a driving force to the linkage plate 437, so that the linkage plate 437 always has a tendency to move downward under the action of the return spring 438. In addition, a stop block (not shown in the figure) located between the vertical section and the horizontal section is installed on the inner wall of the sliding groove 432. The linkage plate 437 can be limited by the stop block. When the driving rod 433 is horizontally separated from the linkage plate 437, the linkage plate 437 abuts against the upper end of the stop block, so that a space is reserved between the linkage plate 437 and the inner bottom wall of the sliding groove 432 for the driving rod 433 to move smoothly to the bottom of the linkage plate 437.

[0057] During the specific implementation process, when the extrusion plate 33 moves down to the inside of the pressing mold 4, the driving rod 433 abuts against the upper end of the pressing mold 4 and is forced to drive the linkage plate 437 to move up along the vertical section of the sliding groove 432 as a whole to avoid interference; when the driving rod 433 slides along the arc section of the through hole 435, the driving rod 433 is laterally separated from the linkage plate 437 and adaptively slides along the horizontal section of the sliding groove 432 to further avoid interference.

[0058] Reference Figure 8 As shown, in order to prevent the pressing mold 4 from rotating arbitrarily after being turned over, so that the extrusion plate 33 cannot be accurately inserted into the pressing mold 4, in this embodiment, corresponding limiting can be performed after the pressing mold 4 is turned over. Specifically, an auxiliary rod 411 is installed on the side of the positioning shaft 41 away from the pressing mold 4, and hemispherical interference blocks 413 are installed at both ends of the auxiliary rod 411 through elastic members 412. Two stabilizing plates 414 are symmetrically installed along the positioning shaft 41 on the side of the vertical plate 1 away from the pressing mold 4, and a slot matching the interference block 413 is opened on the side of the two stabilizing plates 414 close to the positioning shaft 41; through the elastic member 41 2 can apply a driving force to the abutment block 413, so that the abutment block 413 always has a tendency to move away from the auxiliary rod 411 in the initial state. In the initial state, the two ends of the auxiliary rod 411 are respectively arranged relative to the two stabilizing plates 414, and the abutment block 413 is pressed against the slot under the action of the elastic member 412, so that the positioning shaft 41 and the pressing die 4 can be limited by the mutual cooperation between the abutment block 413 and the slot, so as to prevent the positioning shaft 41 from rotating at will and causing the position of the pressing die 4 to be affected, thereby ensuring that the extrusion plate 33 can always be accurately inserted into the pressing die 4 to press and form the metal powder. Embodiment 2:

[0059] Reference Fig. 9 As shown, on the basis of Example 1, in order to ensure the pressing effect of the metal powder, it is necessary to make the metal powder evenly distributed in the pressing mold 4. Based on this, the metal powder can be spread in this embodiment. Specifically, a mesh frame 44 is installed on the inner bottom wall of the pressing mold 4, and a plurality of contraction springs 45 located in the mesh holes of the mesh frame 44 are installed on the inner bottom wall of the pressing mold 4. A bearing plate 46 is commonly provided at the upper ends of the plurality of contraction springs 45. The contraction springs 45 always apply a downward pulling force to the bearing plate 46, so that the bearing plate 46 abuts against the upper end of the mesh frame 44 in the initial state; two rotating shafts 47 symmetrically distributed along the mesh frame 44 are rotatably installed inside the pressing mold 4, and the two rotating shafts 47 are connected by a belt drive. A positioning motor 48 connected to any rotating shaft 47 is installed inside the pressing mold 4, and a plurality of cams 49 equidistantly distributed along its axis are sleeved on the outer wall of the rotating shaft 47.

[0060] During the specific implementation process, the positioning motor 48 is started, and the positioning motor 48 drives multiple cams 49 to rotate through the rotating shaft 47, so that when the protruding part of the cam 49 contacts the supporting plate 46, it can push it upward, and then the supporting plate 46 is quickly moved down and reset under the action of the contraction spring 45, so as to control the supporting plate 46 to vibrate up and down; after the metal powder is filled into the pressing mold 4, the metal powder can be evenly spread on the supporting plate 46 through the vibration of the supporting plate 46, ensuring that the thickness of the metal powder after spreading is consistent, and the air in the metal powder can be removed by vibration, making the metal powder more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing; after the pressing of the metal powder is completed, the pressing mold 4 is controlled to flip, and at this time, the workpiece in the pressing mold 4 can be quickly shaken off by vibration, which is convenient for quick material removal.

[0061] During operation: Step 1: first, apply a release agent in the pressing mold 4 , and then fill the powder raw material to be pressed into the pressing mold 4 .

[0062] Step 2: The hydraulic pump 6 is powered on and started through the controller 76. When the hydraulic pump 6 controls the piston pad 31 to drive the push rod 32 and the extrusion plate 33 to move downward, the extrusion plate 33 drives the linkage column 71 and the electrode ring 74 to move downward synchronously, and the metal powder in the pressing mold 4 is pressed under high pressure through the extrusion plate 33; when the extrusion plate 33 moves downward to extrude the metal powder and drives the electrode ring 74 to contact the contact ring 73, a signal is transmitted to the signal receiver 75 through the electrode ring 74 and the contact ring 73, so that the signal receiver 75 transmits a signal to the controller 76, and the controller 76 controls the hydraulic pump 6 to suspend the oil supply, so that the piston pad 31 cannot continue to move downward, so that the extrusion plate 33 is pressed down to the lowest position and no longer moves, so that the metal powder in the pressing mold 4 is pressed by the extrusion plate 33 and the pressure is maintained for a certain period of time, the density and strength of the metal powder after molding are enhanced, and the pressing molding effect of the metal powder is ensured.

[0063] By rotating the threaded rod 78, the threaded rod 78 drives the movable ring 79, the support rod 80 and the electrode ring 74 to move up or down as a whole, so as to adjust the initial distance between the electrode ring 74 and the contact ring 73, and then adjust the downward movement distance of the extrusion plate 33, so as to increase or decrease the pressure on the metal powder in the pressing mold 4, so that the downward pressing distance of the extrusion plate 33 and the pressure on the metal powder can be adaptively adjusted according to powder raw materials of different materials and different molding requirements, and can be used in powder molding with different pressures, thereby improving the adaptability of the present invention.

[0064] Step 3: When the electrode ring 74 and the contact ring 73 come into contact, the hydraulic pump 6 stops supplying oil. At this time, the controller 76 starts the driving motor 35. The driving motor 35 drives the receiving plate 37 to rotate through the connecting block 36, so that the receiving plate 37 drives the blocking block 38 to move to the bottom of the positioning cylinder 3, so that the blocking block 38 seals the positioning cylinder 3, and can disconnect the connection between the oil inlet pipe 61 and the positioning cylinder 3, so as to prevent the oil in the oil inlet pipe 61 from entering the positioning cylinder 3 through the oil inlet, or the oil in the positioning cylinder 3 from overflowing through the oil inlet and affecting the height of the extrusion plate 33 and the pressure on the metal powder.

[0065] Step 4: When the extrusion plate 33 moves downward, it drives the guide bar 431 and the driving rod 433 to move downward synchronously. During the downward movement of the driving rod 433, it moves along the vertical section and the arc section of the through hole 435. During this period, the driving rod 433 is engaged in the accommodating groove and drives the rotating wheel 434 to rotate. After the driving rod 433 moves from the upper vertical section of the arc section to the lower vertical section, it can drive the rotating wheel 434 to rotate 180 degrees, so that the rotating wheel 434 drives the pressing mold 4 to rotate 180 degrees through the linkage shaft 42 and the positioning shaft 41, so that the pressing mold 4 can be turned over, and the pressing mold 4 remains in a vertical state after turning over; at the same time, the extrusion plate 33 is still located above the pressing mold 4, and then the hydraulic pump 6 is stopped from supplying oil through the controller 76, so that the extrusion plate 33 stops moving downward, so as to facilitate the application of the release agent in the pressing mold 4 and fill the metal powder raw material to be pressed.

[0066] Subsequently, the hydraulic pump 6 resumes oil supply, so that the extrusion plate 33 continues to move downward. At this time, the driving rod 433 moves downward along the vertical section on the lower side of the arc section, so that the pressing mold 4 maintains the angle after flipping, so that the extrusion plate 33 can press and mold the metal powder in the pressing mold 4; after the metal mold in the pressing mold 4 is pressed, the extrusion plate 33 drives the driving rod 433 to move up and reset. When the driving rod 433 passes through the arc section, it drives the rotating wheel 434 to rotate 180 degrees in the opposite direction. The rotating wheel 434 drives the pressing mold 4 to rotate synchronously in the opposite direction through the linkage shaft 42 and the positioning shaft 41, so that the workpiece pressed on the pressing mold 4 is flipped downward with the pressing mold 4, so that the pressed workpiece can be poured into the receiving hopper 5 and taken out.

[0067] By repeating the above steps, the reciprocating turning of the pressing die 4 and the continuous pressing of the metal powder can be achieved, thereby improving the pressing efficiency.

[0068] In addition, after pouring the metal powder into the pressing mold 4, the present invention can automatically spread the metal powder, specifically as follows: start the positioning motor 48, the positioning motor 48 drives multiple cams 49 to rotate through the rotating shaft 47, and the supporting plate 46 is pushed upward by the cam 49, and then the supporting plate 46 is driven to move down and reset quickly through the contraction spring 45, so as to control the supporting plate 46 to vibrate up and down; after filling the metal powder into the pressing mold 4, the metal powder can be evenly spread on the supporting plate 46 through the vibration of the supporting plate 46, ensuring that the thickness of the metal powder after spreading is consistent, and the air in the metal powder can be removed by vibration, making the metal powder more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing; after the pressing of the metal powder is completed, the pressing mold 4 is controlled to flip, and at this time, the workpiece in the pressing mold 4 can be quickly shaken off by vibration, which is convenient for quick material removal.

[0069] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0070] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A powder forming hydraulic device with an adaptive pressure regulating function, comprising two vertical plates (1) parallel to each other, a horizontal plate (2) being commonly mounted on the upper ends of the two vertical plates (1), a positioning cylinder (3) being arranged at the lower end of the horizontal plate (2), a piston pad (31) being slidably arranged inside the positioning cylinder (3), a push rod (32) being mounted at the lower end of the piston pad (31) and slidingly passing through the positioning cylinder (3), an extrusion plate (33) being mounted at the lower end of the push rod (32), a pressing die (4) being mounted between the two vertical plates (1), and a receiving hopper (5) being mounted between the two vertical plates (1) and located below the pressing die (4), characterized in that: An oil inlet is provided between the upper end of the positioning cylinder (3) and the horizontal plate (2); a hydraulic pump (6) is provided at the upper end of the horizontal plate (2); an oil inlet pipe (61) is connected between the output end of the hydraulic pump (6) and the oil inlet; an adjusting device (7) for adjusting pressure is installed between the positioning cylinder (3) and the extrusion plate (33); the adjusting device (7) comprises a linkage column (71) installed at the upper end of the extrusion plate (33); and a fixing plate (72) slidably sleeved on the outside of the linkage column (71) is installed on the outer wall of the positioning cylinder (3).

2. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 1, characterized in that: The regulating device (7) further comprises a contact ring (73) mounted inside the fixing plate (72); an electrode ring (74) matching the contact ring (73) is mounted on the linkage column (71); a signal receiver (75) and a controller (76) which are electrically connected are mounted on the lower end of the horizontal plate (2); and the contact ring (73) and the electrode ring (74) are respectively electrically connected to the signal receiver (75).

3. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 2, characterized in that: The regulating device (7) further comprises a vertical slide groove (77) provided inside the linkage column (71), a threaded rod (78) being rotatably mounted inside the vertical slide groove (77), a movable ring (79) being sleeved on the outer wall of the threaded rod (78) by means of a threaded connection, and the outer wall of the movable ring (79) being connected to the electrode ring (74) via a plurality of support rods (80); A gasket (81) is installed on the upper end of the threaded rod (78) after passing through the linkage column (71), and a support spring (82) sleeved on the outside of the threaded rod (78) is installed between the gasket (81) and the linkage column (71).

4. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 1, characterized in that: A guide cylinder (34) is installed inside the oil inlet, the lower end of the guide cylinder (34) extends into the interior of the positioning cylinder (3), a mounting groove is provided at the top of the positioning cylinder (3), a driving motor (35) is arranged in the mounting groove, a connecting block (36) is sleeved at the bottom of the output shaft of the driving motor (35), a receiving plate (37) located below the guide cylinder (34) is installed on the side wall of the connecting block (36), and a blocking block (38) is provided at the upper end of the receiving plate (37) and is slidably pressed against the bottom of the guide cylinder (34).

5. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 1, characterized in that: Any two mutually parallel outer side walls of the pressing die (4) are provided with positioning shafts (41), the positioning shafts (41) are rotatably mounted on the vertical plate (1), and linkage shafts (42) located above the positioning shafts (41) are rotatably mounted on the two vertical plates (1), the linkage shafts (42) and the positioning shafts (41) are connected to each other via a belt drive, and a driving unit (43) for controlling the rotation of the positioning shafts (41) is installed between the vertical plate (1) and the positioning shafts (41).

6. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 5, characterized in that: The driving unit (43) comprises two guide bars (431) mounted on the upper end of the extrusion plate (33); a sliding groove (432) is provided on one side of the guide bar (431) close to the vertical plate (1); a driving rod (433) is slidably arranged in the sliding groove (432); A rotating wheel (434) is sleeved on the outer wall of the linkage shaft (42), and a through hole (435) for slidingly passing the driving rod (433) is provided on the vertical plate (1).

7. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 6, characterized in that: The through hole (435) is composed of an arc segment and a vertical segment, wherein the arc segment of the through hole (435) is located outside the rotating wheel (434), and the arc segment and the vertical segment of the through hole (435) are connected.

8. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 6, characterized in that: The outer wall of the rotating wheel (434) is provided with a plurality of annularly distributed clamping blocks (436), and a receiving groove for slidingly clamping with the driving rod (433) is formed between two adjacent clamping blocks (436).

9. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 6, characterized in that: The guide bar (431) is an L-shaped structure, and the horizontal section of the guide bar (431) faces the arc section of the through hole (435), and a sliding groove (432) connected to each other is provided on the side of the horizontal section of the guide bar (431) close to the vertical section, and the driving rod (433) is slidably docked in the sliding groove (432); A linkage plate (437) located above the driving rod (433) is slidably disposed in the vertical section of the sliding groove (432), the linkage plate (437) and the driving rod (433) are laterally clamped, and a return spring (438) is installed between the linkage plate (437) and the top of the vertical section of the sliding groove (432).

10. The powder forming hydraulic equipment with adaptive pressure regulation function according to claim 5, characterized in that: An auxiliary rod (411) is installed on the side of the positioning shaft (41) away from the pressing die (4), and hemispherical abutment blocks (413) are installed on both ends of the auxiliary rod (411) through elastic members (412). Two stabilizing plates (414) are symmetrically installed along the positioning shaft (41) on the side of the vertical plate (1) away from the pressing die (4), and a slot matching the abutment block (413) is provided on the side of the two stabilizing plates (414) close to the positioning shaft (41).

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