Graphite forming isostatic press

Abstract

The application relates to a isostatic press for graphite forming, and belongs to the technical field of isostatic presses, which comprises a hydraulic power unit, a horizontal pressure cylinder in communication with the hydraulic power unit, and the hydraulic power unit pumps or discharges insulating pressure medium into the horizontal pressure cylinder; a cylinder cover is rotationally connected to the open end of the horizontal pressure cylinder; a support is slidingly connected in the horizontal pressure cylinder; an elastic mold is rotationally connected in the support; an integrated motor is connected to one end of the horizontal pressure cylinder, and the integrated motor is in transmission connection with the elastic mold, the integrated motor drives the elastic mold to rotate on the support, and the rotating speed of the elastic mold is 1 r / min-2 r / min; the isostatic press can solve the technical problem that the machining allowance of a graphite blank is increased due to gravity when a traditional vertical cavity isostatic press is used for graphite isostatic forming.

Description

Technical Field

[0001] This invention belongs to the field of isostatic press technology, and specifically relates to an isostatic press for graphite forming. Background Technology

[0002] Isostatic graphite (also known as "isostatic graphite") refers to graphite materials produced by cold isostatic pressing using an isostatic press, which is different from traditional molded graphite (unidirectional pressure).

[0003] A patent with publication number CN222844853U discloses a cold isostatic press for graphite products, including a base with legs at the four corners of the base. The legs are equipped with a first support plate and a second support plate. The first support plate is equipped with a working cylinder, and an end cap that can be closed and closed is located directly above the working cylinder. The second support plate is equipped with a hydraulic booster directly below the working cylinder. The base is equipped with a movable isostatic pressing body, and the isostatic pressing body has a first cavity. The end cap and the working cylinder cooperate to perform isostatic pressing within the first cavity.

[0004] The existing technology has the following drawbacks:

[0005] The traditional vertical cavity isostatic press, represented by the aforementioned patent, causes density differences in the vertical direction of the formed graphite blank due to gravity during graphite isostatic pressing, thus increasing the processing allowance. Summary of the Invention

[0006] This invention provides an isostatic press for graphite forming, which solves the technical problem that the traditional vertical cavity isostatic press increases the machining allowance of the graphite blank during graphite isostatic pressing due to gravity.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] This application provides an isostatic press for graphite forming, which includes a hydraulic power unit and further comprises:

[0009] A horizontal pressure cylinder is connected to the hydraulic power unit, and the hydraulic power unit pumps or discharges an insulating pressure medium into the horizontal pressure cylinder.

[0010] The cylinder head is rotatably connected to the open end of the horizontal pressure cylinder;

[0011] The bracket is slidably connected inside the horizontal pressure cylinder;

[0012] An elastic mold is rotatably connected within the bracket;

[0013] An integrated motor is connected to one end of the horizontal pressure cylinder. The integrated motor is connected to the elastic mold for transmission. The integrated motor drives the elastic mold to rotate on the support. The rotational speed of the elastic mold is 1 r / min to 2 r / min.

[0014] The above technical solutions, using an integrated motor and an insulated pressure medium, can ensure the sealing of the horizontal pressure cylinder; the integrated motor driving the elastic mold to rotate at low speed can avoid the gravity deposition of graphite powder, improve the uniformity of density in all directions, and thus reduce the machining allowance.

[0015] In this invention, the aforementioned integrated motor has:

[0016] The housing is connected to the outside of the horizontal pressure cylinder;

[0017] The stator has multiple windings, which are fixedly connected to the inside of the housing;

[0018] The rotor has multiple permanent magnets and is rotatably connected to the housing. One end of the rotor is inserted into the horizontal pressure cylinder.

[0019] The cover plate is connected between the housing and the horizontal pressure cylinder, and the cover plate is used to seal and support the rotation of the rotor;

[0020] An electrical control box is connected to the outside of the housing and is electrically connected to the stator.

[0021] By adopting the above technical solution, the stator winding is built into the inner side of the housing, reducing the electric drive route and simplifying the rotor structure, thereby enabling the integrated motor to have a more stable working state when connected to the horizontal pressure cylinder.

[0022] In this invention, the above-mentioned bracket further comprises:

[0023] A support beam is detachably connected to the top of the bracket;

[0024] A plug shaft is detachably connected to one end of the elastic mold facing the integrated motor, and the other end of the plug shaft away from the elastic mold is connected to the integrated motor for transmission.

[0025] A limiting nut is detachably connected to the end of the elastic mold that is away from the integrated motor;

[0026] A self-locking wheel is attached to the lower end of the bracket.

[0027] The above technical solution uses detachable structural components, which facilitates the installation of the elastic mold into the bracket, and simplifies the connection between the elastic mold and the integrated motor to a direct plug-in connection.

[0028] In this invention, the isostatic press further includes:

[0029] A limiting frame is rotatably mounted on one side of the horizontal pressure cylinder;

[0030] A drive motor is connected to the limiting frame, and the drive motor drives the limiting frame to engage with the cylinder head and the horizontal pressure cylinder on the outside or away from the cylinder head and the horizontal pressure cylinder.

[0031] The above technical solution uses a drive motor to limit the movement of the horizontal pressure cylinder, which simplifies the moving parts and improves the stability of the device.

[0032] In this invention, the isostatic press further includes:

[0033] A track is connected inside the horizontal pressure cylinder. The track is used to guide the support to slide in and out, and to limit the rotation of the support.

[0034] The above technical solution uses a track for guidance and limiting, which improves the accuracy of the connection between the elastic mold and the integrated motor, while avoiding the turbulence caused by the rotation and agitation of the support and the pressure medium.

[0035] In this invention, the isostatic press further includes:

[0036] The loading trolley is slidably connected to the outside of the opening side of the horizontal pressure cylinder. When the cylinder cover is opened and rotated open, the loading trolley slides into the horizontal pressure cylinder and docks with the track.

[0037] By adopting the above technical solution and using a loading trolley, the required space height for loading and unloading is reduced, the height requirement of the factory building is lowered, and environmental adaptability is improved.

[0038] The present invention has at least the following advantages:

[0039] 1. The use of an integrated motor and insulated pressure medium ensures the sealing performance of the horizontal pressure cylinder;

[0040] 2. The integrated motor-driven low-speed rotation of the elastic mold can avoid the gravity deposition of graphite powder, improve the uniformity of density in all directions, and thus reduce the processing allowance, while avoiding excessive agitation of the pressure medium. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 An isometric view of an isostatic press for graphite forming in operation, provided in an embodiment of the present invention;

[0043] Figure 2 A front view of an isostatic press for graphite forming in operation, excluding the hydraulic power unit, provided in an embodiment of the present invention;

[0044] Figure 3 for Figure 2 Sectional view at point AA;

[0045] Figure 4 for Figure 3 Enlarged view of section B in the image;

[0046] Figure 5 This is a schematic diagram of the structure of an isostatic press for graphite forming in the feeding state, as provided in an embodiment of the present invention.

[0047] Icons: 101-Horizontal pressure cylinder; 102-Cylinder head; 103-Cylinder head opening device; 104-Integrated motor; 1041-Housing; 1042-Stator; 1043-Rotor; 1044-Cover plate; 1045-Electrical control box; 105-Adapter shaft; 106-Bracket; 1061-Support beam; 1062-Self-locking wheel; 1063-Plug shaft; 1064-Limit nut; 107-Elastic mold; 108-Railway; 109-Hydraulic interface end; 201-Limit frame; 202-Drive motor; 3-Hydraulic power unit; 4-Graphite powder; 5-Feeding trolley. Detailed Implementation

[0048] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0049] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms, etc., is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to welding, bolting, or riveting; they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Example:

[0053] Please refer to Figures 1 to 5 , Figures 1 to 5 The image shown is an embodiment of this application.

[0054] This embodiment provides an isostatic press for graphite forming, which includes a hydraulic power unit 3 and further comprises:

[0055] The horizontal pressure cylinder 101 is connected to the hydraulic power unit 3. The hydraulic power unit 3 pumps in or out the insulating pressure medium into the horizontal pressure cylinder 101. During use, the pressure medium is pumped in and out through the hydraulic interface end 109 provided at the bottom of the horizontal pressure cylinder 101 via the hydraulic power unit 3. At the same time, the top of the horizontal pressure cylinder 101 is provided with an exhaust port and a solenoid valve (those skilled in the art can reasonably set it at the highest point of the cavity, not shown in the figure). When the pressure medium is injected into the horizontal pressure cylinder 101, air is discharged from the exhaust port. After the pressure medium is filled, the solenoid valve closes and continues to inject pressure medium to increase the pressure. It should be noted that the hydraulic power unit 3 is all the hydraulic power source required for the entire isostatic press. The power units of other traditional vertical cylinder isostatic presses are roughly the same, so they will not be further explained or limited here.

[0056] like Figure 1 As shown, the cylinder head 102 is rotatably connected to the open end of the horizontal pressure cylinder 101. The cylinder head 102 is opened by pushing it to the side through the hydraulic telescopic rod of the cylinder head opening device 103, and the cylinder head 102 is pulled back to close it under pressure. It should be noted that the movement of the cylinder head 102 and the cylinder head opening device 103 is roughly the same as the structure and principle of the traditional vertical cylinder. Those skilled in the art can make use of it without creative work, so it will not be further limited or described in detail here.

[0057] like Figure 3 and Figure 5 As shown, the bracket 106 is slidably connected inside the horizontal pressure cylinder 101;

[0058] like Figure 3As shown, the elastic mold 107 is rotatably connected within the support 106. The elastic mold 107 is filled with graphite powder 4. It should be noted that the elastic mold 107 is a conventional technical solution in the field of isostatic pressing, and its specific structure and filling method are common knowledge in this field, therefore they will not be further described or specifically limited here. However, the structure that contributes to the technical solution is as follows: Figure 3 and Figure 5 As shown, the two ends of the elastic mold 107 are respectively threaded to the insert shaft 1063 and the limiting nut 1064 for transmission and axial limiting;

[0059] like Figure 3 and Figure 4 As shown, the integrated motor 104 is connected to one end of the horizontal pressure cylinder 101. The integrated motor 104 is connected to the elastic mold 107 for transmission. The integrated motor 104 drives the elastic mold 107 to rotate on the support 106. The rotational speed of the elastic mold 107 is 1 r / min to 2 r / min. It should be noted that in order to maintain a low rotational speed, the integrated motor 104 needs to be precisely controlled by the electrical control box 1045. The specific principle is similar to that of a servo motor and will not be described in detail here. Alternatively, a reducer or a complex gear reduction structure can be set at the output end of the integrated motor 104.

[0060] It should be noted that isostatically pressed graphite is generally cylindrical. It is difficult to solve the problem of different density distribution caused by gravity by using a vertical pressure cylinder through rotation. Therefore, a horizontal pressure cylinder 101 and a low-speed rotating elastic mold 107 are used to make gravity act evenly on the outside of the graphite column. At the same time, if the rotation speed is too high, the graphite powder 4 will be subjected to centrifugal force, which will make the internal force more complex. Meanwhile, the high-speed rotating elastic mold 107 will disturb the pressure medium, making the internal pressure distribution of the cylinder more complex. Therefore, a rotation speed of 1r / min to 2r / min can obtain a better force distribution. A slower rotation speed will cause the high-density area formed by gravity to be compacted prematurely, while a faster rotation speed will increase the centrifugal force and the pressure distribution of the pressure medium.

[0061] Through the above technical solution, the use of an integrated motor 104 and an insulating pressure medium can ensure the sealing of the horizontal pressure cylinder 101; the integrated motor 104 drives the elastic mold 107 to rotate at low speed, which can avoid the gravity deposition of graphite powder 4, improve the uniformity of anisotropic density, and thus reduce the machining allowance.

[0062] As a preferred embodiment, the aforementioned integrated motor 104 has:

[0063] The housing 1041 is connected to the outside of the horizontal pressure cylinder 101, and the housing 1041 and the horizontal pressure cylinder 101 form an integrally sealed internal pressure space.

[0064] The stator 1042 has multiple windings, which are fixedly connected to the inside of the housing 1041;

[0065] Rotor 1043 has multiple permanent magnets. Rotor 1043 is rotatably connected to housing 1041. One end of rotor 1043 is inserted into horizontal pressure cylinder 101.

[0066] The cover plate 1044 is connected between the housing 1041 and the horizontal pressure cylinder 101. The cover plate 1044 is used to seal the horizontal pressure cylinder 101 and the housing 1041 and to support the rotation of the rotor 1043 through the bearing.

[0067] The electrical control box 1045 is connected to the outside of the housing 1041. The electrical control box 1045 is electrically connected to the stator 1042. The wires connected to the outside are installed using the traditional sealing and plugging method of pressure vessels, or by embedding conductive metal pillars in ceramic sleeves to form a complete cylinder sidewall. The power supply inside and outside the cylinder is realized through the conductive metal pillars.

[0068] By adopting the above technical solution, the winding of stator 1042 is built into the inner side of housing 1041, reducing the electric drive route and simplifying the structure of rotor 1043, thereby enabling the integrated motor 104 to have a more stable working state when connected to horizontal pressure cylinder 101.

[0069] In a preferred embodiment, the above-mentioned support 106 further comprises:

[0070] Support beam 1061 is detachably connected to the top of bracket 106;

[0071] The insertion shaft 1063 is detachably connected to the end of the elastic mold 107 facing the integrated motor 104, and the end of the insertion shaft 1063 away from the elastic mold 107 is connected to the integrated motor 104 for transmission.

[0072] The limiting nut 1064 is detachably connected to one end of the elastic mold 107 that is away from the integrated motor 104;

[0073] The self-locking wheel 1062 is connected to the lower end of the bracket 106.

[0074] In use, the support beam 1061 is disassembled, and the elastic mold 107 is transferred to the bracket 106 by a forklift or overhead crane. Then, the rotating shafts and insert shafts 1063 on both sides are threaded into the two ends of the elastic mold 107 after passing through the bearings on both sides of the bracket 106, so that the elastic mold 107 can rotate inside the bracket 106. Then, the support beam 1061 is reinstalled to ensure the distance between the two ends of the bracket 106 to prevent the two sides from collapsing towards the middle and causing the elastic mold 107 to jam and be unable to rotate. Then, the self-locking wheel 1062 at the lower end of the bracket 106 is pushed into the horizontal pressure cylinder 101. Then, the locking mechanism on the self-locking wheel 1062 is used to lock and prevent the bracket 106 from moving axially. It should be noted that the self-locking wheel 1062 can be purchased by those skilled in the art through public channels, and no further explanation or specific limitation is made here.

[0075] The above technical solution uses detachable structural components, which facilitates the installation of the elastic mold 107 into the bracket 106, and simplifies the connection between the elastic mold 107 and the integrated motor 104 to a direct plug-in connection.

[0076] As a preferred embodiment, the above-mentioned isostatic press further includes:

[0077] like Figure 1 and Figure 5 As shown, the limiting frame 201 is rotatably mounted on one side of the horizontal pressure cylinder 101. It should be noted that the attached drawing is only for positional illustration, and the specific dimensions of the limiting frame 201 are set according to the pressure borne by the cylinder head 102.

[0078] The drive motor 202 is connected to the limit frame 201. The drive motor 202 drives the limit frame 201 to engage with the cylinder head 102 and the horizontal pressure cylinder 101 on the outside or away from the cylinder head 102 and the horizontal pressure cylinder 101. It should be noted that in order to enable the drive motor 202 to engage with the limit frame 201 on the outside of the cylinder head 102 and the horizontal pressure cylinder 101, it must have locking capability. Therefore, the drive motor 202 is selected as a servo motor or a conventional motor with an additional locking device.

[0079] The above technical solution uses a drive motor 202 to drive the limit switch, which avoids the movement of the horizontal pressure cylinder 101, simplifies the moving parts, and improves the stability of the device.

[0080] As a preferred implementation method, such as Figure 3 and Figure 5 As shown, the above-mentioned isostatic press also includes:

[0081] The track 108 is connected inside the horizontal pressure cylinder 101. The track 108 is used to guide the support 106 to slide in and out. Through the groove of the self-locking wheel 1062 and the protrusion of the track 108, the track 108 can also be used to limit the rotation of the support 106.

[0082] The above technical solution uses track 108 for guidance and limiting, which improves the accuracy of the connection between elastic mold 107 and integrated motor 104, and at the same time avoids the turbulence caused by the rotation and agitation of pressure medium by bracket 106.

[0083] As a preferred implementation method, such as Figure 5 As shown, the above-mentioned isostatic press also includes:

[0084] The loading trolley 5 is slidably connected to the outside of the opening side of the horizontal pressure cylinder 101. When the cylinder cover 102 is opened and rotated open, the loading trolley 5 slides into the horizontal pressure cylinder 101 and docks with the track 108. It should be noted that, in order to further improve the docking accuracy, a slide rail can also be set below the loading trolley 5 for guidance.

[0085] By adopting the above technical solution and using the loading trolley 5, the required space height for loading and unloading is reduced, the height requirement of the factory building is lowered, and environmental adaptability is improved.

[0086] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An isostatic press for graphite forming, comprising a hydraulic power unit (3), characterized in that, Also includes: A horizontal pressure cylinder (101) is connected to the hydraulic power unit (3), and the hydraulic power unit (3) pumps or discharges an insulating pressure medium into the horizontal pressure cylinder (101). The cylinder head (102) is rotatably connected to the open end of the horizontal pressure cylinder (101); The bracket (106) is slidably connected inside the horizontal pressure cylinder (101); The elastic mold (107) is rotatably connected to the bracket (106); An integrated motor (104) is connected to one end of the horizontal pressure cylinder (101). The integrated motor (104) is connected to the elastic mold (107) in a transmission connection. The integrated motor (104) drives the elastic mold (107) to rotate on the support (106). The rotational speed of the elastic mold (107) is 1 r / min to 2 r / min. The integrated motor (104) has: The housing (1041) is connected to the outside of the horizontal pressure cylinder (101); The rotor (1043) has multiple permanent magnets and is rotatably connected to the housing (1041). One end of the rotor (1043) is inserted into the horizontal pressure cylinder (101). The cover plate (1044) is connected between the housing (1041) and the horizontal pressure cylinder (101). The cover plate (1044) is used to seal the housing (1041) and the horizontal pressure cylinder (101) and to support the rotation of the rotor (1043).

2. The isostatic press for graphite forming according to claim 1, characterized in that, The integrated motor (104) has: The stator (1042) has multiple windings, which are fixedly connected to the inside of the housing (1041); An electrical control box (1045) is connected to the outside of the housing (1041), and the electrical control box (1045) is electrically connected to the stator (1042).

3. The isostatic press for graphite forming according to claim 2, characterized in that, The support (106) also has: A support beam (1061) is detachably connected to the top of the bracket (106); The insert shaft (1063) is detachably connected to one end of the elastic mold (107) facing the integrated motor (104), and the other end of the insert shaft (1063) away from the elastic mold (107) is connected to the integrated motor (104) for transmission. The limiting nut (1064) is detachably connected to the end of the elastic mold (107) away from the integrated motor (104); The self-locking wheel (1062) is connected to the lower end of the bracket (106).

4. The isostatic press for graphite forming according to claim 3, characterized in that, Also includes: The limiting frame (201) is rotatably disposed on one side of the horizontal pressure cylinder (101); The drive motor (202) is connected to the limiting frame (201) in a transmission manner. The drive motor (202) drives the limiting frame (201) to be engaged with the cylinder head (102) and the horizontal pressure cylinder (101) on the outside or away from the cylinder head (102) and the horizontal pressure cylinder (101).

5. The isostatic press for graphite forming according to claim 4, characterized in that, Also includes: The track (108) is connected inside the horizontal pressure cylinder (101). The track (108) is used to guide the support (106) to slide in and out, and the track (108) is used to restrict the rotation of the support (106).

6. The isostatic press for graphite forming according to claim 5, characterized in that, Also includes: The loading trolley (5) is slidably connected to the outside of the opening side of the horizontal pressure cylinder (101). When the cylinder cover (102) is opened and rotated open, the loading trolley (5) slides into the horizontal pressure cylinder (101) and docks with the track (108).

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