Heat pipe sealing method and heat pipe sealing tool

Abstract

The present disclosure provides a heat pipe sealing method and a heat pipe sealing tool, and relates to the technical field of heat pipe sealing. The heat pipe sealing method comprises the following steps: obtaining the specification parameters of a filling pipe of a heat pipe to be sealed; constructing a corresponding filling pipe clamping mechanical model based on the specification parameters of the filling pipe; wherein the filling pipe clamping mechanical model is used to simulate the stress distribution and stress state of the filling pipe under different jaw spacings; under a plurality of preset jaw spacings, clamping simulation is performed based on the filling pipe clamping mechanical model, one or more jaw spacings are selected from the plurality of jaw spacings, in which the stress of the filling pipe is greater than the minimum clamping stress and less than or equal to the fracture threshold, to form a candidate jaw spacing set; based on the candidate jaw spacing set, the target jaw spacing of the filling pipe is determined; and based on the target jaw spacing, the filling pipe is clamped and the sealing operation is completed. Through the above method, the filling pipe can be prevented from being broken or the sealing failure caused by the experience-based control of the spacing, and the success rate of the heat pipe sealing and the product qualification rate are improved.

Description

Technical Field

[0001] This disclosure relates to the field of heat pipe sealing technology, specifically to a heat pipe sealing method and heat pipe sealing fixture. Background Technology

[0002] During the manufacturing process of heat pipes, after the internal vacuuming and working medium filling are completed, the filling tube connected to the heat pipe needs to be sealed to ensure the vacuum and sealing performance inside the heat pipe. The filling tube (also commonly called the liquid filling tube or liquid injection tube) is a slender tubular structure that connects to the inside of the heat pipe shell and is used for vacuuming and filling the heat pipe with the working medium. It is generally a small tube extending from the heat pipe shell or a thin tube welded to the heat pipe. Its diameter is small and its wall thickness is thin, making it extremely prone to deformation and breakage during clamping. Therefore, the sealing operation requires a high degree of precision.

[0003] However, traditional heat pipe sealing methods typically rely on operator experience to control the clamping head spacing, lacking a standardized spacing standard. This leads to the following problems: First, if the spacing is too small, the clamping force on the filling tube becomes excessive, exceeding its structural limits, causing the filling tube to crack or break. This not only results in sealing failure but also renders the finished heat pipe unusable. Second, if the spacing is too large, the filling tube cannot be effectively clamped, leaving it loose after clamping. This can lead to incomplete welding and gaps during subsequent sealing, causing a decrease in the internal vacuum of the heat pipe and sealing failure. This affects the heat dissipation performance and service life of the heat pipe, failing to meet the needs of large-scale, standardized heat pipe production. Summary of the Invention

[0004] This disclosure addresses the problems existing in the prior art by providing a heat pipe sealing method and heat pipe sealing tooling. It can effectively solve the problems caused by traditional sealing methods relying on the operator's experience to control the clamping head spacing, resulting in either the filling tube being broken due to excessively small spacing or the sealing failure due to excessively large spacing. This improves the success rate of heat pipe sealing and the product qualification rate, and can meet the needs of large-scale and standardized heat pipe production.

[0005] To achieve the above objectives, the technical solution adopted in this disclosure is as follows: A first aspect of this disclosure provides a heat pipe sealing method, comprising: obtaining the specifications of the filling tube of the heat pipe to be sealed; constructing a corresponding filling tube clamping mechanical model based on the specifications of the filling tube; wherein the filling tube clamping mechanical model is used to simulate the stress distribution and stress state of the filling tube under different clamping head spacings; performing clamping simulation based on the filling tube clamping mechanical model under multiple preset clamping head spacings, and selecting one or more clamping head spacings where the stress of the filling tube is greater than the minimum clamping stress and less than or equal to the fracture threshold, forming a candidate clamping head spacing set; determining the target clamping head spacing of the filling tube based on the candidate clamping head spacing set; and clamping the filling tube and completing the sealing operation based on the target clamping head spacing.

[0006] In one possible implementation, determining the target clamp spacing of the filling tube based on the candidate clamp spacing set includes: when the candidate clamp spacing set includes a clamp spacing, using the clamp spacing as the target clamp spacing.

[0007] In one possible implementation, determining the target clamp spacing of the filling tube based on the candidate clamp spacing set includes: when the candidate clamp spacing set includes multiple clamp spacings, taking the median value of the interval formed by all clamp spacings in the candidate clamp spacing set as the target clamp spacing.

[0008] In one possible implementation, under multiple preset clamping head spacings, clamping simulation is performed based on a filling tube clamping mechanics model to select one or more clamping head spacings where the filling tube stress is greater than the minimum clamping stress and less than or equal to the fracture threshold, forming a candidate clamping head spacing set. This includes: determining the minimum clamping stress and fracture threshold of the filling tube; under multiple preset clamping head spacings, clamping simulation is performed based on a filling tube clamping mechanics model to obtain filling tube stress data for each clamping head spacing; based on the filling tube stress data for each clamping head spacing, one or more clamping head spacings where the filling tube stress is greater than the minimum clamping stress and less than or equal to the fracture threshold are selected to form a candidate clamping head spacing set.

[0009] In one possible implementation, the sealing operation includes: welding the end of the clamped filling tube using manual argon arc welding.

[0010] In one possible implementation, the difference between two adjacent clamping head spacings of the preset plurality of clamping head spacings is no greater than 0.2 mm.

[0011] In one possible implementation, the specifications of the filling tube include at least the material, outer diameter, and wall thickness.

[0012] In one possible implementation, the minimum clamping stress is the minimum stress value required to stably clamp the filling tube without loosening and to prevent displacement during subsequent welding; the minimum clamping stress is determined based on the material and wall thickness of the filling tube.

[0013] In one possible implementation, the fracture threshold is the maximum stress value at which the filling tube does not undergo plastic deformation and fractures; the fracture threshold is determined by a stress calculation formula; wherein, the stress calculation formula includes: σ=F / S, where σ is the stress borne by the filling tube, i.e., the filling tube stress, F is the clamping force, and S is the contact area between the clamp and the filling tube.

[0014] A second aspect of this disclosure provides a heat pipe sealing fixture for implementing a heat pipe sealing method as described in the first aspect or any possible embodiment of the first aspect. The heat pipe sealing fixture includes a cylinder, a movable end clamp, and a fixed end clamp. The movable end clamp is driven and connected to the cylinder and is used to move closer to or further away from the fixed end clamp under the drive of the cylinder. The fixed end clamp is disposed opposite to the movable end clamp and is used to cooperate with the movable end clamp to perform a clamping operation on the filling tube of the heat pipe to be sealed.

[0015] Compared with the prior art, this disclosure has the following beneficial effects: The heat pipe sealing method provided in this disclosure obtains the specifications of the filling tube, constructs a suitable clamping mechanical model to simulate stress distribution, combines a preset spacing to simulate and screen candidate spacings that meet stress requirements and determines the target spacing, and then clamps the filling tube based on the target spacing to complete the sealing. This achieves precise and controllable clamping head spacing, effectively avoiding problems such as filling tube damage and sealing failure caused by traditional experience-based operations, ensuring the stability and consistency of sealing operations, improving the heat pipe sealing qualification rate and production efficiency, and adapting to the needs of large-scale and standardized production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a heat pipe sealing fixture provided in an embodiment of this disclosure; Figure 2 This is a schematic flowchart of a heat pipe sealing method provided in an embodiment of this disclosure. Detailed Implementation

[0017] The present disclosure will now be further described with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present disclosure and should not be construed as limiting the scope of protection of the present disclosure. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application.

[0018] The acquisition, transmission, storage, use, and processing of data in this disclosed technical solution comply with relevant national laws and regulations. In the embodiments of this disclosure, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this disclosure, and do not imply that the applicant has already used or necessarily used such solutions.

[0019] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0020] This disclosure combines Figure 1 The structure of the heat pipe sealing fixture is described.

[0021] Figure 1 This is a schematic diagram of the structure of a heat pipe sealing fixture provided in an embodiment of this disclosure. Figure 1 As shown, the heat pipe sealing fixture 100 includes a cylinder 110, a moving end clamp 120, and a fixed end clamp 130. The moving end clamp 120 is driven and connected to the cylinder 110, and is used to move closer to or away from the fixed end clamp 130 under the drive of the cylinder 110. The fixed end clamp 130 is arranged opposite to the moving end clamp 120 and is used to cooperate with the moving end clamp 120 to perform the clamping operation of the filling tube of the heat pipe to be sealed.

[0022] The heat pipe sealing method provided in this disclosure can be based on... Figure 1 The heat pipe sealing fixture shown below achieves this, in conjunction with the following... Figure 2 This hot-sealing method is explained.

[0023] Figure 2 This is a schematic flowchart of a heat pipe sealing method provided in an embodiment of this disclosure. Figure 2 As shown, the heat pipe sealing method specifically includes the following steps S11 to S15.

[0024] Step S11: Obtain the specifications of the filling tube of the heat pipe to be sealed.

[0025] It should be noted that, in this embodiment of the disclosure, the heat pipe to be sealed refers to the heat pipe whose filling tube needs to be sealed after the internal vacuuming and working medium filling are completed.

[0026] In this embodiment of the disclosure, the specification parameters of the filling tube of the heat pipe to be sealed can be obtained through a preset detection module (such as a size measuring instrument or a material measuring instrument), which provides basic data support for the subsequent construction of a suitable filling tube clamping mechanical model.

[0027] In one possible implementation, the specifications of the filling tube include at least the material, outer diameter, and wall thickness. Specifically, the outer diameter and wall thickness of the filling tube can be accurately measured using a laser dimension measuring instrument, and the material of the filling tube can be detected using a material analyzer.

[0028] For example, in one specific embodiment, the heat pipe to be sealed is a copper heat pipe, and its filling tube is a thin tube formed by extending the heat pipe shell. The outer diameter of the filling tube is 4 mm and the wall thickness is 1 mm, as detected by a laser size measuring instrument. The material is detected by a material analyzer as copper.

[0029] Step S12: Based on the specifications of the filling tube, construct the corresponding mechanical model for clamping the filling tube.

[0030] It should be noted that, in the embodiments of this disclosure, the filling tube clamping mechanical model refers to a mechanical analysis model constructed based on the specification parameters of the filling tube, used to simulate the stress distribution and force state of the filling tube under different clamping head spacings.

[0031] In one possible implementation, when constructing the mechanical model for clamping the filling tube, the material, wall thickness, and outer diameter of the filling tube are considered, along with the uniformity of the clamping force distribution. The model is constructed using the finite element analysis (FEA) method. By dividing the mesh and setting boundary conditions, the stress changes of the filling tube under different clamping head spacings are simulated. In another possible implementation, when constructing the model, the production process parameters of the filling tube (such as machining accuracy) can be combined to modify the model, further improving the accuracy of the model simulation to adapt to filling tubes with different machining accuracies.

[0032] Additionally, it should be noted that the simulation results of the filling tube clamping mechanics model directly determine the accuracy of the subsequent selection of candidate clamping head spacing sets. Therefore, the model construction must be precisely matched with the specifications of the filling tube. Different specifications of filling tubes require the construction of corresponding clamping mechanics models to avoid simulation deviations caused by using a general model.

[0033] For example, in a specific implementation, based on the filling tube specifications (material is copper, outer diameter is 4mm, wall thickness is 1mm) obtained in step S11, the finite element analysis method is used, with the tensile strength and hardness of copper as material parameters, and the 4mm outer diameter and 1mm wall thickness as structural parameters, to divide a fine mesh and set clamping boundary conditions, and construct a corresponding filling tube clamping mechanical model.

[0034] Through simulation calculations, the stress data of the filling tube corresponding to different clamp head spacings can be obtained, providing data support for the subsequent screening of candidate clamp head spacing sets.

[0035] Step S13: Under multiple preset clamping head spacings, perform clamping simulation based on the filling tube clamping mechanics model, and select one or more clamping head spacings where the filling tube stress is greater than the minimum clamping stress and less than or equal to the fracture threshold to form a candidate clamping head spacing set.

[0036] It should be noted that, in the embodiments of this disclosure, the preset multiple clamp head spacings refer to multiple spacing values ​​that are set in advance and cover all possible clamping spacing ranges of the filling tube. The difference between two adjacent clamp head spacings is no greater than 0.2mm to ensure the accuracy of the clamping simulation. The range of the preset spacing is determined based on the specifications of the filling tube. The lower limit is the sum of the outer diameter of the filling tube and the reserved gap for clamping of the tooling, and the upper limit is 1.5-2.0 times the outer diameter of the filling tube.

[0037] Additionally, it should be noted that the filling tube stress refers to the force per unit area borne by the filling tube when it is clamped by the pliers. Its magnitude directly determines whether the filling tube will deform, break, or achieve effective clamping. The minimum clamping stress is the minimum stress value required to stably clamp the filling tube without loosening and without displacement during subsequent welding. In one possible implementation, the minimum clamping stress is determined based on the material and wall thickness of the filling tube. The fracture threshold is the maximum stress value at which the filling tube does not undergo plastic deformation or break. In one possible implementation, the fracture threshold is determined by a stress calculation formula. The stress calculation formula includes: σ = F / S, where σ is the stress borne by the filling tube, i.e., the filling tube stress, F is the clamping force, and S is the contact area between the pliers and the filling tube.

[0038] In one possible implementation, under multiple preset clamping head spacings, clamping simulation is performed based on the clamping mechanics model of the filling tube, and one or more clamping head spacings that are greater than the minimum clamping stress and less than or equal to the fracture threshold are selected to form a candidate clamping head spacing set. Specifically, this may include the following steps S301 to S303.

[0039] Step S301: Determine the minimum clamping stress and fracture threshold of the filling tube.

[0040] In one possible implementation, the minimum clamping stress is based on the material and wall thickness of the filling tube, which are pre-calibrated. By consulting the mechanical property parameters of the filling tube material and combining them with the structural strength corresponding to the wall thickness, the minimum clamping stress corresponding to different specifications of filling tubes is determined. In another possible implementation, the fracture threshold is calculated using a stress calculation formula, combined with parameters such as the tensile strength and wall thickness of the filling tube material, to determine the maximum stress value at which the filling tube will not undergo plastic deformation and fracture, which is then used as the fracture threshold.

[0041] For example, in one specific implementation, for a filling tube with an outer diameter of 4 mm, a wall thickness of 1 mm, and made of copper, the minimum clamping stress is determined to be 50 MPa and the fracture threshold is 100 MPa.

[0042] Step S302: Under multiple preset clamping head spacings, perform clamping simulation based on the filling tube clamping mechanical model to obtain the filling tube stress data under each clamping head spacing.

[0043] It should be noted that clamping simulation refers to the mechanical model of filling tube clamping constructed based on step S12, which simulates the actual scenario when the clamping head clamps the filling tube under different clamping head spacings, and restores the force state in the real clamping process; filling tube stress data refers to the force data per unit area of ​​the filling tube under different clamping head spacings. This data directly reflects the force situation of the filling tube under different spacings and is the core basis for subsequent selection of candidate clamping head spacings.

[0044] In one possible implementation, the clamping simulation adopts an automated simulation method, which automatically calls the mechanical model of the filling tube clamping and simulates each preset clamp head spacing in sequence, records the filling tube stress data corresponding to each spacing in real time, and automatically stores it to the system database for easy retrieval and filtering later; in another possible implementation, a manual assisted simulation method can be used, where staff set the simulation parameters, start the clamping simulation process, and after the simulation is completed, generate a stress data report, which is then checked and confirmed by staff for subsequent spacing filtering.

[0045] Step S303: Based on the filling tube stress data under each clamping head spacing, select one or more clamping head spacings where the filling tube stress is greater than the minimum clamping stress and less than or equal to the fracture threshold, to form a candidate clamping head spacing set.

[0046] In one possible implementation, the minimum clamping stress and fracture threshold determined in step S301, along with the stress data obtained in step S302, are automatically compared and screened to compile a set of candidate jaw spacings that meet the criteria. This eliminates the need for manual intervention and improves screening efficiency. In another possible implementation, staff members combine the stress threshold determined in step S301 with the stress data report from step S302 to manually check whether the stress corresponding to each spacing meets the criteria. They then screen out the jaw spacings that meet the requirements and manually compile a set of candidate jaw spacings, which is suitable for scenarios where the screening results need to be manually verified.

[0047] For example, in a specific implementation, for a filling tube with an outer diameter of 4mm and a wall thickness of 1mm, the preset clamping head spacings are 0.9mm, 1.0mm, 1.1mm, 1.2mm, and 1.3mm, respectively. Based on the filling tube clamping mechanical model constructed in step S12, clamping simulation is performed, and the filling tube stress data corresponding to each spacing are obtained as 105MPa, 95MPa, 75MPa, 62MPa, and 45MPa, respectively. It is known that the minimum clamping stress of the filling tube with an outer diameter of 4mm and a wall thickness of 1mm is 50MPa and the fracture threshold is 100MPa. The clamping head spacings corresponding to stresses greater than 50MPa and less than or equal to 100MPa are selected as 1.0mm, 1.1mm, and 1.2mm, forming a candidate clamping head spacing set.

[0048] By selecting safe and effective clamping distances, a basis is provided for determining the subsequent target jaw spacing.

[0049] Step S14: Determine the target clamp spacing of the filling tube based on the candidate clamp spacing set.

[0050] It should be noted that, in the embodiments of this disclosure, the target clamping head spacing refers to the unique clamping head spacing determined from the set of candidate clamping head spacings and used for actually clamping the filling tube. This spacing must take into account both the effective clamping of the filling tube and structural safety, ensuring that neither loosening nor crushing occurs during the clamping process.

[0051] In one possible implementation, determining the target clamp spacing of the filling tube based on the candidate clamp spacing set includes: when the candidate clamp spacing set includes a clamp spacing, using the clamp spacing as the target clamp spacing.

[0052] In another possible implementation, the target clamp spacing of the filling tube is determined based on the candidate clamp spacing set, including: when the candidate clamp spacing set includes multiple clamp spacings, the median value of the interval formed by all clamp spacings in the candidate clamp spacing set is taken as the target clamp spacing.

[0053] For example, in one specific implementation, the candidate jaw spacing set formed in step S13 includes 1.0mm, 1.1mm, and 1.2mm, and the median value of 1.1mm is taken as the target jaw spacing.

[0054] Step S15: Based on the target clamping head spacing, clamp the filling tube and complete the sealing operation.

[0055] It should be noted that, in this embodiment, clamping the filling tube refers to using the moving and fixed clamping heads of the heat pipe sealing fixture to clamp the filling tube according to the target clamping head spacing, ensuring the filling tube is in a stable, secure state with uniform clamping force to prevent local deformation or breakage. Sealing refers to sealing the clamped filling tube to ensure the vacuum and airtightness inside the heat pipe, preventing leakage of the working medium and guaranteeing the heat dissipation performance and service life of the heat pipe. Based on the determined target clamping head spacing, the moving clamping head is driven close to the fixed clamping head to clamp the filling tube, and then the sealing operation is completed using a preset sealing method. This enables precise and reliable sealing of the heat pipe, eliminating reliance on operator experience, standardizing and scaling up the sealing operation, ensuring sealing quality, and improving the yield rate of finished heat pipe products.

[0056] In one possible implementation, the sealing operation includes manually argon arc welding the end of the clamped filling tube. In another possible implementation, the sealing operation can be completed using laser welding, depending on the material and specifications of the filling tube. It is understood that the welding process must ensure a tight seal, free of gaps, pores, or other defects, to guarantee the vacuum and airtightness inside the heat pipe.

[0057] Additionally, it should be noted that during the clamping of the filling tube, the clamping head spacing needs to be monitored in real time to ensure that the spacing is stable at the target clamping head spacing. This is to avoid uneven force on the filling tube caused by spacing fluctuations, which could lead to problems such as deformation and breakage.

[0058] For example, in one specific implementation, for a filling tube with an outer diameter of 4mm and a wall thickness of 1mm, based on the target clamping head spacing determined in step S14, the cylinder of the heat pipe sealing fixture is controlled to drive the moving end clamping head to move towards the fixed end clamping head until the distance between the two precisely reaches the target clamping head spacing, thus stably clamping the filling tube to ensure that the filling tube is not loose or deformed (avoiding compression deformation of the filling tube due to improper spacing). Subsequently, the operator uses manual argon arc welding to weld the end of the clamped filling tube. After welding is completed, the cylinder drives the moving end clamping head away from the fixed end clamping head, removes the heat pipe, and completes the entire sealing operation. After testing, the heat pipe seal is dense, the internal vacuum degree meets the requirements, there is no leakage problem, and the inner diameter of the filling tube is not deformed, meeting the usage requirements.

[0059] It should be noted that the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "contains" mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0060] Although operations are described in a specific order in the accompanying drawings in this disclosure, it should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0061] Finally, it should be noted that the above content is only used to illustrate the technical solution of this disclosure, and is not intended to limit the scope of protection of this disclosure. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this disclosure do not depart from the substance and scope of the technical solution of this disclosure.

Claims

1. A method for sealing a heat pipe, characterized in that, include: Obtain the specifications of the filling tube of the heat pipe to be sealed; Based on the specifications of the filling tube, a corresponding mechanical model for clamping the filling tube is constructed; wherein, the mechanical model for clamping the filling tube is used to simulate the stress distribution and stress state of the filling tube under different clamping head spacings. Under multiple preset clamping head spacings, clamping simulation is performed based on the filling tube clamping mechanical model to screen out one or more clamping head spacings where the filling tube stress is greater than the minimum clamping stress and less than or equal to the fracture threshold, forming a candidate clamping head spacing set; Based on the candidate clamp spacing set, the target clamp spacing of the filling tube is determined; Based on the target clamping head spacing, clamp the filling tube and complete the sealing operation.

2. The heat pipe sealing method according to claim 1, characterized in that, Determining the target clamp spacing of the filling tube based on the candidate clamp spacing set includes: When the candidate jaw spacing set includes a jaw spacing, the jaw spacing is taken as the target jaw spacing.

3. The heat pipe sealing method according to claim 1, characterized in that, Determining the target clamp spacing of the filling tube based on the candidate clamp spacing set includes: When the candidate jaw spacing set includes multiple jaw spacings, the median value of the interval formed by all jaw spacings in the candidate jaw spacing set is taken as the target jaw spacing.

4. The heat pipe sealing method according to claim 1, characterized in that, Under multiple preset clamping head spacings, clamping simulations are performed based on the filling tube clamping mechanics model to select one or more clamping head spacings where the filling tube stress is greater than the minimum clamping stress and less than or equal to the fracture threshold, forming a candidate clamping head spacing set, including: Determine the minimum clamping stress and fracture threshold of the filling tube; Under multiple preset clamping head spacings, clamping simulations are performed based on the filling tube clamping mechanical model to obtain filling tube stress data under each clamping head spacing. Based on the filling tube stress data at each clamping head spacing, one or more clamping head spacings with filling tube stress greater than the minimum clamping stress and less than or equal to the fracture threshold are selected to form a candidate clamping head spacing set.

5. The heat pipe sealing method according to claim 1, characterized in that, The sealing operation includes: using manual argon arc welding to weld the end of the clamped filling tube.

6. The heat pipe sealing method according to claim 1, characterized in that, The difference between any two adjacent plier head spacings of the preset multiple plier head spacings shall not exceed 0.2 mm.

7. The heat pipe sealing method according to any one of claims 1-6, characterized in that, The specifications of the filling tube include at least the material, outer diameter, and wall thickness.

8. The heat pipe sealing method according to any one of claims 1-6, characterized in that, The minimum clamping stress is the minimum stress value required to stably clamp the filling tube without loosening and to prevent displacement during subsequent welding; the minimum clamping stress is determined based on the material and wall thickness of the filling tube.

9. The heat pipe sealing method according to any one of claims 1-6, characterized in that, The fracture threshold is the maximum stress value at which the filling tube fractures without undergoing plastic deformation. The fracture threshold is determined by a stress calculation formula; The stress calculation formula includes: σ = F / S, where σ is the stress borne by the filling tube, i.e., the filling tube stress, F is the clamping force, and S is the contact area between the clamp head and the filling tube.

10. A heat pipe sealing fixture, characterized in that, The heat pipe sealing fixture is used to implement the heat pipe sealing method as described in any one of claims 1-9, and the heat pipe sealing fixture includes a cylinder, a moving end clamp, and a fixed end clamp; wherein... The movable clamp head is connected to the cylinder drive and is used to move closer to or away from the fixed clamp head under the drive of the cylinder; the fixed clamp head is arranged opposite to the movable clamp head and is used to cooperate with the movable clamp head to perform the clamping operation of the filling tube of the heat pipe to be sealed.

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