Frame structure of warm isostatic press

Abstract

This invention relates to the field of hydrostatic presses, and more particularly to the frame structure of a thermostatic press. It includes a frame body formed in annular shape, with a hollow portion forming a receiving cavity for accommodating the hydrostatic press cylinder. A clamping device is provided at the end of the frame body corresponding to the receiving cavity. The clamping device includes a clamping base fixed to the frame body, and a clamping actuator is provided on the clamping base. The clamping actuator slides relative to the clamping base and has a first execution position and a second execution position. In the first execution position, the clamping actuator is configured, driven by a clamping driver, to abut against and hold a plug against the hydrostatic press cylinder. This invention, through the clamping device mounted on the frame body, actively applies clamping force to the plug from the outside, ensuring the plug is tightly abutted against the end of the cylinder, significantly improving the safety and sealing reliability of the equipment under ultra-high pressure environments.

Description

Technical Field

[0001] This invention relates to the field of static presses, and more particularly to the frame structure of a warm isostatic press. Background Technology

[0002] A warm isostatic press is a device that uses a fluid medium such as liquid or gas to form a workpiece under uniform high pressure in a specific temperature environment. It is widely used in powder metallurgy, ceramic forming, densification of composite materials and other fields.

[0003] One of the core components of a hydrostatic press is the cylinder, which bears enormous working pressure. The cylinder is a cylindrical structure containing high pressure, and the two ends are sealed by plugs to form an internal seal.

[0004] However, during the operation of the hydrostatic press, the internal high pressure exerts outward pressure on the plug. In existing technologies, the plug is typically connected to the hydrostatic press cylinder via threads or clamps. This connection method suffers from insufficient connection force when facing the internal working pressure of the hydrostatic press, which can easily lead to loosening, leakage, or even detachment of the plug from the cylinder. Summary of the Invention

[0005] The purpose of this invention is to provide a frame structure for a thermostatic press to solve the problem of insufficient connection force between the plug and the cylinder in the working state in the prior art.

[0006] The technical solution of the present invention is: a frame structure of a thermostatic press, including a frame body, the frame body being formed as an annular shape, the hollow portion forming a receiving cavity, the receiving cavity being used to receive the cylinder of the thermostatic press; The end of the frame body is provided with a clamping device corresponding to the receiving cavity. The clamping device includes a clamping base, which is fixed to the frame body. A clamping actuator is provided on the clamping base. The clamping actuator slides relative to the clamping base and has a first execution position and a second execution position. In the first execution station, the clamping actuator is configured to, driven by the clamping driver, abut against and hold the plug on the hydrostatic press cylinder.

[0007] Preferably, the frame body includes a first portion located at the end for connecting a clamping device, a pair of the first portions being connected by a second portion, the second portion being disposed on the side away from the receiving cavity such that the thickness of the middle section of the second portion is greater than the thickness of the end of the second portion.

[0008] Preferably, the clamping base includes a base plate that fits into the frame body, and a connecting plate is provided on the vertical base plate; The clamping driver is vertically fixed to the connecting plate, and the clamping actuator is vertically fixed to the actuating end of the clamping driver and moves along the length direction of the clamping driver under the drive of the clamping driver.

[0009] Preferably, the clamping actuator includes a retaining plate configured to abut against the plug; a plurality of guide rods are provided through the connecting plate, and the retaining plate is connected to a transmission plate through the plurality of guide rods, and the clamping driver is directly connected to the transmission plate.

[0010] Preferably, any of the guide rods and the connecting plate are connected by a linear bearing.

[0011] Preferably, the clamping driver is configured as a double-stroke hydraulic cylinder.

[0012] Preferably, a conveying device is provided in conjunction with the frame body. The conveying device is used to carry the static press cylinder and send the static press cylinder into or out of the receiving cavity.

[0013] Preferably, the conveying device includes a cylinder fixture, the cylinder fixture being provided with a mounting groove that is conformally arranged to the cylinder of the static press, and the cylinder fixture being disposed on the conveying base; The top of the conveying base is provided with a conveying guide rail perpendicular to the length of the frame body. The cylinder fixture is slidably mounted on the conveying guide rail and moves along the conveying guide rail under the drive of the conveying driver.

[0014] Preferably, a stop is provided at one end of the conveying guide rail, and an elastic buffer is provided at the end of the stop facing the cylinder fixture.

[0015] Preferably, the conveyor driver is configured as a linear motor.

[0016] Compared with the prior art, the advantages of the present invention are: (1) The present invention applies a clamping force to the plug from the outside through a clamping device installed on the frame body, so that the plug is tightly abutted against the end of the cylinder. This clamping method can form a supporting force opposite to the internal high pressure, fundamentally preventing the plug from loosening, leaking or even falling off due to internal pressure, and significantly improving the safety and sealing reliability of the equipment in ultra-high pressure environment.

[0017] (2) The present invention forms an arched variable cross-section structure by protruding the second part away from the receiving cavity, making its middle section thickness greater than its end thickness. This design significantly increases the bending section modulus of the middle section of the second part, enabling it to more effectively bear and disperse the maximum tensile stress from the first part, thereby enhancing the structural rigidity and deformation resistance of the entire frame and providing a solid foundation for the stable operation of the clamping device.

[0018] (3) The clamping actuator of this application adopts a frame structure consisting of a retaining plate, multiple parallel guide rods, and a transmission plate. The thrust of the clamping driver first acts on the transmission plate, and is then evenly distributed to each guide rod through the transmission plate. The guide rods then drive the retaining plate to move forward smoothly. This ensures that the clamping force can act evenly and vertically on the end face of the plug, avoiding local stress concentration or poor sealing caused by uneven loading. The linear bearing set between the guide rod and the connecting plate further ensures the smoothness of sliding and the accuracy of the movement direction, significantly improving the service life and operational reliability of the clamping device.

[0019] (4) This application includes a conveying device. The cylinder is stably supported by a cylinder jig with a contoured mounting groove, and a conveying guide rail perpendicular to the length of the frame and a linear motor drive are used to achieve automated and precise loading and unloading of the cylinder. Furthermore, a stopper with an elastic buffer at the end of the conveying guide rail can flexibly decelerate and precisely stop the cylinder jig when it reaches the predetermined position, effectively avoiding violent impacts caused by inertia, ensuring the smoothness of the conveying process and the accuracy of positioning, and significantly improving production efficiency and operational safety. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the frame structure of a thermostatic press according to the present invention; Figure 2 This is a plan view of the frame structure of a thermostatic press according to the present invention, in which the cylinder and plug are hidden. Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 1 Enlarged view at point B in the middle; The components are as follows: 1. Frame body; 11. First part; 12. Second part; 13. Receiving cavity; 2. Clamping device; 21. Clamping base; 211. Base plate; 212. Connecting plate; 22. Clamping actuator; 221. Holding plate; 222. Guide rod; 223. Transmission plate; 23. Clamping driver; 24. Linear bearing; 3. Conveying device; 31. Cylinder fixture; 32. Conveying base; 33. Conveying guide rail; 34. Conveying driver; 35. Stopper; 351. Elastic buffer; 4. Cylinder; 5. Plug. Detailed Implementation

[0021] To facilitate understanding of this application, before introducing the specific embodiments in this application, the application scenario of this application, namely, a warm isostatic press, will be introduced first.

[0022] The core component of a warm isostatic press is the cylinder body 4, a cylindrical structure with a forming cavity inside. The workpiece to be statically pressed is formed within this cavity. Both ends of the cylinder body 4 are sealed with plugs 5 to maintain the seal of the forming cavity. However, during operation, the pressure inside the forming cavity is extremely high, which can easily cause the plugs 5 to disconnect from the cylinder body 4, leading to an accident.

[0023] The present invention will be further described in detail below with reference to specific embodiments: like Figure 1 - Figure 4 As shown, a frame structure for a thermostatic press includes a frame body 1. The frame body 1 is generally formed into an approximately flat ring, and its hollow interior forms a receiving cavity 13. When the cylinder 4 of the thermostatic press is working, the cylinder 4 is placed in the receiving cavity 13.

[0024] To prevent the plug 5 from separating from the cylinder 4 due to high pressure during operation, in this application, a clamping device 2 is provided at the end of the frame body 1, corresponding to the position of the receiving cavity 13.

[0025] The clamping device 2 starts to operate after the cylinder body 4 is installed into the accommodating cavity 13, and is used to tightly abut the plug 5 at the end of the cylinder body 4 against the cylinder body 4 to resist the high pressure difference generated by the working medium inside the cylinder body 4 on the plug 5 from the inside.

[0026] Specifically, in combination Figure 1 and Figure 3 As shown, the clamping device 2 includes a clamping base 21, which is fixed to the end face of the frame body 1 by fasteners or welding. A clamping actuator 22 is mounted on the clamping base 21. The clamping actuator 22 can slide relative to the clamping base 21 under the drive of the clamping driver 23, and enter the first execution station or the second execution station through this relative sliding.

[0027] The first execution station is set to the position where the clamping actuator 22 presses the plug 5 against the cylinder body 4; while the second execution station corresponds to the position where the clamping actuator 22 is away from the plug 5. When the clamping actuator is in this position, the cylinder body 4 can be removed from or placed into the receiving cavity 13.

[0028] In the first execution station, the clamping actuator 22, driven by the clamping driver 23, abuts against the outer end face of the plug 5 and applies pressure toward the cylinder 4 to the plug 5, firmly pressing the plug 5 onto the cylinder 4, so that it cannot produce axial displacement relative to the cylinder 4 under the internal pressure of the cylinder 4.

[0029] In this application, the frame body 1 is composed of a first part 11 located at both ends and a second part 12 connecting the two first parts 11. The clamping device 2 is fixed to the first part 11. When the cylinder 4 is working, the first part 11 is subjected to a thrust (reaction force) along the length of the cylinder 4. This thrust causes the annular frame body 1 to collapse inward, especially the second part 12.

[0030] To address this issue and further enhance the strength of the frame body 1, in a preferred embodiment of this application, the second portion 12 protrudes outward from the side furthest from the receiving cavity 13, such that the thickness of the middle section of the second portion 12 is greater than the thickness of its ends. This forms an arched variable cross-section structure, thereby providing the middle region of the second portion 12 with a larger flexural section modulus, enabling it to more effectively withstand and disperse maximum tensile stress.

[0031] In one embodiment of this application, the clamping base 21 comprises a base plate 211 that fits against the end face of the frame body 1, and a connecting plate 212 disposed perpendicular to the base plate 211. The clamping actuator 23 is configured as a hydraulic cylinder, with its cylinder body vertically fixed to the connecting plate 212 and its piston rod extending toward the center of the receiving cavity 13. The clamping actuator 22 is fixed to the end of the piston rod of the clamping actuator 23, thereby moving linearly along the length of the piston rod under the drive of the clamping actuator 23.

[0032] Because the force applied by the clamping actuator 22 is relatively large and the clamping driver 23 is configured as a single unit on any side of the frame body, in order to ensure that the clamping actuator 22 can apply a thrust to the plug 5 smoothly and evenly, in a preferred embodiment of this application, the clamping actuator 22 includes a retaining plate 221 for direct contact with the plug 5. Between the retaining plate 221 and the connecting plate 212, a plurality of parallel guide rods 222 are provided through the connecting plate 212. The retaining plate 221 is fixedly connected to one end of these guide rods 222, while the other ends of the guide rods 222 are connected to a transmission plate 223. The piston rod end of the clamping driver 23 is directly connected to the transmission plate 223. Furthermore, in this embodiment, the clamping driver 23 is configured as a double-stroke hydraulic cylinder, enabling it to generate traction force during both the extension and retraction strokes.

[0033] In this way, when the piston rod retracts, the thrust is evenly transmitted to multiple guide rods 222 through the transmission plate 223. The guide rods 222 then drive the retaining plate 221 to move forward smoothly, pressing against the plug 5. This structure avoids the uneven load and torque that may be generated by a single piston rod directly pushing the retaining plate 221, ensuring a uniform distribution of clamping force, resulting in the optimal stress state of the plug 5 and a good locking effect. Furthermore, a linear bearing 24 can be installed between each guide rod 222 and the through hole of the connecting plate 212. This makes the sliding of the guide rod 222 smoother and more precise, and can withstand a certain radial load, improving motion accuracy and service life.

[0034] The cylinder 4 of the static press is very heavy, therefore, in order to facilitate the insertion and removal of the cylinder 4 from the receiving cavity 13, a conveying device 3 is also provided corresponding to the frame body 1 in a preferred embodiment of this application.

[0035] The conveying device 3 includes a cylinder fixture 31. The upper surface of the cylinder fixture 31 has a mounting groove that conforms to the outer wall of the cylinder 4. The cylinder 4 is placed in the mounting groove and thus stably supported. The cylinder fixture 31 is mounted on a conveying base 32. A conveying guide rail 33 is laid on the top of the conveying base 32. The length direction of the conveying guide rail 33 is perpendicular to the length direction of the frame body 1, that is, perpendicular to the axis of the cylinder 4. The bottom of the cylinder fixture 31 is slidably mounted on the conveying guide rail 33 via a slider.

[0036] A conveyor driver 34 is provided in conjunction with the conveyor rail 33. The conveyor driver 34 is used to drive the cylinder fixture 31 to move along the conveyor rail 33, thereby accurately feeding the cylinder 4 into or pulling it out of the receiving cavity 13. The conveyor driver 34 can be a linear drive device such as an electric cylinder, a linear motor, or a hydraulic cylinder. In this application, the conveyor driver 34 is a linear motor.

[0037] In addition, such as Figure 4 As shown, to prevent the cylinder fixture 31 from experiencing severe impact or inaccurate positioning due to inertia at the end of the conveying process, a stopper 35 is provided at the end of the conveying guide rail 33. An elastic buffer portion 351, such as a rubber buffer block or a spring buffer head, is provided at the end of the stopper 35 facing the cylinder fixture 31. When the cylinder fixture 31 moves to the predetermined position, it first contacts the elastic buffer portion 351 for gentle deceleration, and is finally precisely stopped, thus ensuring a smooth and safe conveying process.

[0038] During work: The cylinder fixture 31 mounts the cylinder 4, which runs along the conveying track 33 under the drive of the conveying driver 34, and stops the cylinder 4 in the receiving cavity 13.

[0039] Subsequently, the clamping device 2 operates: the actuating end of the clamping driver 23 retracts, driving the transmission plate 223 to move toward the accommodating cavity 13. The transmission plate 223 transmits the force evenly to the retaining plate 221 through the guide rod 222, and the retaining plate 221 applies pressure toward the cylinder 4 to the plug 5, firmly pressing the plug 5 onto the cylinder 4.

[0040] When the isostatic press finishes operation, the clamping actuator 23 extends in the reverse direction, so that the retaining plate 221 no longer exerts force on the plug 5. Then, the conveying actuator 34 pushes the static press cylinder out of the receiving cavity 13 through the cylinder fixture 31.

[0041] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent 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. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. The frame structure of a warm isostatic press, characterized in that, Includes a frame body (1), which is formed in an annular shape and has a hollow portion forming a receiving cavity (13), which is used to receive the static pressure cylinder (4). The end of the frame body (1) is provided with a clamping device (2) corresponding to the receiving cavity (13). The clamping device (2) includes a clamping base (21), which is fixed on the frame body (1). A clamping actuator (22) is provided on the clamping base (21). The clamping actuator (22) slides relative to the clamping base (21) and has a first execution position and a second execution position. In the first execution station, the clamping actuator (22) is configured to abut and hold the plug (5) against the hydrostatic cylinder (4) under the drive of the clamping driver (23).

2. The frame structure of the isostatic press according to claim 1, characterized in that, The frame body (1) includes a first part (11) located at the end and used to connect the clamping device (2), a pair of the first parts (11) are connected by a second part (12), the second part (12) is provided on the side away from the receiving cavity (13) such that the thickness of the middle section of the second part (12) is greater than the thickness of the end of the second part (12).

3. The frame structure of the isostatic press according to claim 2, characterized in that, The clamping base (21) includes a base plate (211) that fits into the frame body (1), and a connecting plate (212) is provided on the vertical base plate (211). The clamping driver (23) is vertically fixed on the connecting plate (212), and the clamping actuator (22) is vertically fixed on the execution end of the clamping driver (23) and moves along the length direction of the clamping driver (23) under the drive of the clamping driver (23).

4. The frame structure of the isostatic press according to claim 3, characterized in that, The clamping actuator (22) includes a retaining plate (221) configured to abut against the plug (5); The connecting plate (212) is provided with multiple guide rods (222), the retaining plate (221) is connected to the transmission plate (223) through the multiple guide rods (222), and the clamping driver (23) is directly connected to the transmission plate (223).

5. The frame structure of the isostatic press according to claim 4, characterized in that, The guide rod (222) and the connecting plate (212) are connected by a linear bearing (24).

6. The frame structure of the isostatic press according to claim 4, characterized in that, The clamping actuator (23) is configured as a double-stroke hydraulic cylinder.

7. The frame structure of the isostatic press according to claim 2, characterized in that, The frame body (1) is equipped with a conveying device (3), which is used to carry the static press cylinder (4) and send the static press cylinder (4) into the accommodating cavity (13) or remove it from the accommodating cavity (13).

8. The frame structure of the isostatic press according to claim 7, characterized in that, The conveying device (3) includes a cylinder fixture (31), which is provided with a mounting groove that conforms to the shape of the static press cylinder (4). The cylinder fixture (31) is mounted on the conveying base (32). The top of the conveying base (32) is provided with a conveying guide rail (33) perpendicular to the length direction of the frame body (1). The cylinder fixture (31) is slidably disposed on the conveying guide rail (33) and moves along the conveying guide rail (33) under the drive of the conveying driver (34).

9. The frame structure of the isostatic press according to claim 8, characterized in that, A stopper (35) is provided at one end of the conveying guide rail (33), and an elastic buffer part (351) is provided at the end of the stopper (35) facing the cylinder fixture (31).

10. The frame structure of the isostatic press according to claim 8, characterized in that, The transport driver (34) is configured as a linear motor.

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