Server case sinkage testing and pre-arching shaping method and pre-arching shaping jig

Abstract

The invention discloses a server case sinkage testing and pre-arching shaping method and a pre-arching shaping jig, and relates to the technical field of servers, simulation software is firstly adopted to carry out full-load simulation on a server case model, and sinkage simulation curves at preset point positions are respectively obtained; calculating a pre-arching value interval at the preset point position according to the simulation curve at the preset point position; measuring the sinkage of the server case at the preset point location, and judging whether the sinkage of the server case at the preset point location falls into the pre-arching value interval at the preset point location or not; if the sinkage of the server case falls into the pre-arching value interval, when the server is fully loaded, the sinkage of the server case can be ensured to meet the requirement, and the adjacent server below the server case cannot be greatly extruded, rubbed and interfered; and if the sinkage of the server case does not fall into the pre-arching value interval, a pre-arching shaping jig needs to be adopted to perform pre-arching shaping on the server case.

Description

Technical Field

[0001] The present invention relates to the technical field of servers, and in particular to a server chassis sinking amount test and pre-arch shaping method, and a pre-arch shaping jig. Background Art

[0002] As server architectures become increasingly complex, the layout of various hardware components, such as boards and hard drives, within the chassis becomes increasingly dense, placing an increasing load on the chassis. After server assembly, the weight of the various boards and hard drives causes the server chassis to sink and deform under the influence of gravity. Servers that sink excessively can cause significant compression, friction, and interference with adjacent servers, preventing them from being properly extended.

[0003] In the related art, testing the sinking amount of the server chassis requires the server to be fully loaded. Since the fully loaded sinking test requires the server chassis to be counterweighted, the process of accurately configuring the counterweight equivalent to the fully loaded state of the server is complicated and time-consuming, inefficient, and prone to errors. Summary of the Invention

[0004] The present application provides a server chassis sinkage testing and pre-arch shaping method and a pre-arch shaping fixture to at least solve the problem of low efficiency in sinkage testing in related technologies.

[0005] This application provides a server chassis sinkage measurement and pre-arch shaping method, including:

[0006] Use simulation software to simulate the server chassis model under full load, and obtain the sinking simulation curves at preset points respectively;

[0007] Calculate the pre-arch value interval at the preset point according to the simulation curve at the preset point;

[0008] Measure the sinking amount of the server chassis at the preset point;

[0009] Determine whether the sinking amount of the server chassis at the preset point falls within the pre-arch value range at the preset point;

[0010] If not, a pre-arch shaping fixture is used to pre-arch the server chassis so that the sinking amount of the server chassis at the preset point falls within the pre-arch value range at the preset point.

[0011] Through the present application, simulation software is first used to simulate the full load of the server chassis model, and the sinking simulation curves at the preset points are obtained respectively; then, the pre-arch value interval at the preset point is calculated based on the simulation curve at the preset point; then, the sinking of the server chassis at the preset point is measured, and it is determined whether the sinking of the server chassis at the preset point falls within the pre-arch value interval at the preset point; if the sinking of the server chassis falls within the pre-arch value interval, then when the server is fully loaded, it can be ensured that the sinking of the server chassis meets the requirements, and will not cause a large extrusion, friction, and interference to the adjacent servers below it; if the sinking of the server chassis does not fall within the pre-arch value interval, it is necessary to use a pre-arch shaping fixture to pre-arch the server chassis, so that the sinking of the server chassis at the preset point falls within the pre-arch value interval at the preset point, thereby ensuring that the sinking of the server chassis meets the requirements when the server is fully loaded. The server chassis sinkage test and pre-arch shaping method does not require configuration of a counterweight equivalent to that of a fully loaded server, thereby improving test efficiency and thus production efficiency. Furthermore, the sinkage of an empty server chassis at a preset point is measured without the need for a dedicated sinkage test instrument, thereby saving costs.

[0012] The present application also provides a pre-arch shaping jig for pre-arching a server chassis, comprising:

[0013] Two support beams are symmetrically provided, and a server chassis is suitable for being placed between the two support beams;

[0014] a cantilever beam connected to the tops of the two support beams, wherein the cantilever beam is provided with a threaded hole;

[0015] A stud is rotatably arranged in the threaded hole, and a first end of the stud is suitable for abutting against the server chassis.

[0016] In this application, since the server chassis is suitable for being placed between the two support beams, the server chassis can be clamped to prevent the server chassis from shaking. The cantilever beam is provided with a threaded hole, and the stud is rotatably provided in the threaded hole. The first end of the stud is suitable for abutting against the server chassis, so rotating the stud can apply a pre-arch force to the server chassis, and after loosening the stud, the stud can remain in its original position, thereby maintaining the pre-arch force applied to the server chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1This is a schematic diagram of using a feeler gauge to measure the gap between the midpoint of the front window of the server chassis base and the platform;

[0019] Figure 2 This is a diagram showing how to use a feeler gauge to measure the gap between the midpoint of the rear window of a server chassis base and the platform.

[0020] Figure 3 A schematic diagram of turning over a server chassis and placing it on a platform, and placing a mating block in the middle of the bottom surface of the server chassis;

[0021] Figure 4 Schematic diagram of using a pre-arch shaping fixture to pre-arch the server chassis;

[0022] Figure 5 This is a schematic diagram of the pre-arch shaping jig;

[0023] Figure 6 The sinking simulation curve of a certain point.

[0024] The above drawings include the following reference numerals:

[0025] 1. Server chassis; 2. Platform; 3. Pre-arch shaping jig; 301. Support beam; 302. Cantilever beam; 303. Stud; 304. Handle; 305. Support base; 4. Plug gauge; 5. Fitting block. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application. The terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two elements. The terms "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes both absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism may be, for example, within 5°; "perpendicular" includes both absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity may also be, for example, within 5°. "Equal" includes both absolute equality and approximate equality, where the acceptable deviation range for approximate equality may be, for example, that the difference between the two is less than or equal to 5% of either. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] As server architectures become increasingly complex, the layout of various boards, hard drives, and other hardware within the chassis becomes increasingly dense, placing an increasing load on the chassis. After server assembly, the weight of the various boards, hard drives, and other components can cause the server chassis 1 to sink and deform under the influence of gravity. A server that sinks excessively can significantly squeeze, rub, and interfere with adjacent servers, preventing them from being properly extended.

[0030] In the prior art, testing the sinkage of a server chassis 1 requires a fully loaded server and measurement using a dedicated sinkage tester. Since fully loaded sinkage testing requires counterweighting the server chassis 1, accurately configuring the counterweights to match the fully loaded server is a complex, time-consuming process prone to errors. Furthermore, the need for a dedicated sinkage tester increases equipment costs, increasing testing costs. The conventional sinkage testing process is relatively lengthy, resulting in low production efficiency and difficulty meeting the needs of large-scale mass production.

[0031] The embodiment of the present application provides a method for testing the sinkage of a server chassis and pre-arching the chassis, comprising the following steps:

[0032] S1. Use simulation software to perform full load simulation on the server chassis 1 model, and obtain sinkage simulation curves at preset points respectively;

[0033] S2. Calculate the pre-arch value interval at the preset point according to the simulation curve at the preset point;

[0034] S3, measuring the sinking amount of the server chassis 1 at a preset point;

[0035] S4, determining whether the sinking amount of the server chassis 1 at the preset point falls within the pre-arch value interval at the preset point;

[0036] S5. If the sinking amount of the server chassis 1 at the preset point does not fall within the pre-arch value interval at the preset point, use the pre-arch shaping fixture 3 to pre-arch the server chassis 1 so that the sinking amount of the server chassis 1 at the preset point falls within the pre-arch value interval at the preset point.

[0037] In this embodiment, simulation software is first used to perform a full load simulation on the server chassis 1 model, and the sinking simulation curves at the preset points are obtained respectively; then, the pre-arch value interval at the preset point is calculated according to the simulation curve at the preset point; then, the sinking of the server chassis 1 at the preset point is measured, and it is determined whether the sinking of the server chassis 1 at the preset point falls within the pre-arch value interval at the preset point; if the sinking of the server chassis 1 falls within the pre-arch value interval, then when the server is fully loaded, it can be ensured that the sinking of the server chassis 1 meets the requirements, and no large squeezing, friction, or interference is caused to the adjacent servers below it; if the sinking of the server chassis 1 does not fall within the pre-arch value interval, it is necessary to use a pre-arch shaping fixture 3 to perform pre-arch shaping on the server chassis 1, so that the sinking of the server chassis 1 at the preset point falls within the pre-arch value interval at the preset point, thereby ensuring that the sinking of the server chassis 1 meets the requirements when the server is fully loaded. The server chassis sinkage test and pre-arch shaping method does not require configuration of a counterweight equivalent to that of a fully loaded server, thereby improving test efficiency and thus production efficiency. Furthermore, the sinkage of an empty server chassis 1 at a preset point is measured without the need for a dedicated sinkage test instrument, thereby saving costs.

[0038] It should be noted that measuring the sinking amount of the server chassis 1 at a preset point specifically refers to measuring the sinking amount of the empty server chassis 1 at a preset point. Compared with related technologies, there is no need to configure a counterweight equivalent to the fully loaded state of the server, which can improve testing efficiency and thus improve production efficiency.

[0039] In one of the above embodiments, step S2 specifically includes:

[0040] The lowest value in the simulation curve is taken as the server no-load and full-load difference δ, and the sum of the expected value interval of the sinking amount at the preset point and the server no-load and full-load difference δ is obtained to obtain the pre-arch value interval at the preset point.

[0041] In this embodiment, the lowest value in the simulation curve is used as the difference δ between the server's no-load and full-load values. The δ value corresponds to the maximum sinking value that occurs during the full-load simulation. The sum of the expected sinking value interval at the preset point and the server's no-load and full-load difference value obtains the pre-arch value interval at the preset point. When the sinking amount of the empty server chassis 1 falls into the pre-arch value interval, when the server is fully loaded, it is sufficient to ensure that the sinking amount of the server chassis 1 meets the requirements and will not cause a large extrusion, friction, or interference effect on the adjacent server below it.

[0042] Specifically in one embodiment, the preset points include the midpoint of the front window of the base, the midpoint of the rear window of the base, and the center point of the base. For example, if the difference δ between the server's no-load and full-load values ​​at the midpoint of the front window of the base is 0.5mm, the expected value range of the sinking amount at the midpoint of the front window of the base is 0 to -0.5mm, so the pre-arch value range at the midpoint of the front window of the base can be calculated to be +0.5mm to 0; for example, if the difference δ between the server's no-load and full-load values ​​at the midpoint of the rear window of the base is 1mm, the expected value range of the sinking amount at the midpoint of the rear window of the base is 0 to -0.5mm, so the pre-arch value range at the midpoint of the front window of the base can be calculated to be +1.0mm to +0.5mm; for example, if the difference δ between the server's no-load and full-load values ​​at the center point of the base is 1.5mm, the expected value range of the sinking amount at the center point of the base is 0 to -0.5mm, so the pre-arch value range at the midpoint of the front window of the base can be calculated to be +1.5mm to +1.0mm.

[0043] In one embodiment, the method further comprises:

[0044] S6. Taking the stable value in the simulation curve as the sinking amount of the fully loaded server;

[0045] S7. Determine whether the structural design of the server chassis 1 meets the requirements based on the sinking amount of the server when fully loaded.

[0046] In this embodiment, the stable value in the simulation curve is the sinking amount when the server chassis 1 is fully loaded. The sinking amount of the server fully loaded can be used to determine whether the structural design of the server chassis 1 meets the requirements. If the sinking amount is too large, it can be said that the structural design of the server chassis 1 does not meet the standard specifications.

[0047] Specific combination Figure 6 , Figure 6 This is a sinking simulation curve of a certain point when the server chassis 1 is fully loaded. The lowest point of the sinking simulation curve is -0.9 mm, and the stable value corresponds to the displacement near the end of the time, which is -0.6 mm.

[0048] In one embodiment, performing full load simulation on the server chassis 1 model in step S1 includes:

[0049] The boundary conditions are set to constrain the three axial degrees of freedom of the edges on both sides of the base of the server chassis 1 model, the damping parameters of the simulation model are set to preset values, and the solution time is set to the preset time.

[0050] In this embodiment, the three-axial degrees of freedom of the edges on both sides of the base of the server chassis 1 model are constrained to ensure that the edges on both sides of the server chassis 1 model remain stationary, a gravity field identical to that in a fully loaded state is applied to the server chassis 1 model, and the damping parameters are set to preset values ​​to ensure that the simulation curve can tend to be stable.

[0051] Specifically, in one embodiment, the damping parameter of the simulation model is set to 50, and the solution time is set to 0.1 s.

[0052] It should be noted that this embodiment does not specifically limit the damping parameter and solution time of the simulation model. The damping parameter of the simulation model can be set to 100, and the solution time can be set to 0.2 s.

[0053] Specifically in one embodiment, the simulation software specifically includes abaqus software.

[0054] Specifically in one embodiment, the above step S1 further includes the following steps:

[0055] S01. Model creation: A structural engineer generates a 3D model of the server chassis 1 .

[0056] S02. Model simplification: Simulation engineers import the entire machine 3D model into the simulation pre-processing software Hypermesh for geometric cleaning and simplification. They remove small holes and fillets with a radius less than 0.5 mm to avoid generating poor-quality meshes. They simplify components that do not affect the overall calculation. The principle of simplification is not to affect key parameters such as the overall stiffness, moment of inertia, and center of mass of the component. All other small features can be removed.

[0057] S03. Meshing: For thin-walled sheet metal parts such as chassis base, chassis cover, hard disk frame, fan frame, power frame, PCIe frame, and support beams, extract the mid-surface and use S4R reduced integral shell elements for meshing.

[0058] S04. Finite element connection: Finite element processing is performed on bolt connections, welding and other connection methods between components.

[0059] S05. Define material model and properties: Sheet metal parts and board components such as chassis base, chassis cover, and hard disk frame use elastic-plastic constitutive model.

[0060] S06. Define contact: First, create contact properties. Here, you need to define the normal and tangential effects of the contact. The tangential effect includes the relative motion between the contact surfaces and any frictional shear stress. The normal effect is used to define the relationship between the contact force and the contact gap. When calculating sag (sag), the normal effect uses the hard contact algorithm, while the tangential effect uses the friction model, with the tangential friction coefficient defined as 0.2.

[0061] After step S06, the boundary conditions are set to constrain the three axial degrees of freedom of the edges on both sides of the base of the server chassis 1 model, a gravity field is applied to the server chassis 1 model, and the model is exported to inp format. Then, abaqus is opened and the inp file generated in the previous step is imported. The damping parameter of the simulation model is set to 50, and the solution time is set to 0.1s. Calculation is performed to obtain the simulation curve.

[0062] In one embodiment, the preset points include the midpoint of the front window of the base, the midpoint of the rear window of the base, and the center point of the base.

[0063] In this embodiment, the preset points include the midpoint of the front window of the base, the midpoint of the rear window of the base, and the center point of the base. Therefore, it is necessary to obtain the sinking amount simulation curve at the midpoint of the front window of the base, the sinking amount simulation curve at the midpoint of the rear window of the base, and the sinking amount simulation curve at the center point of the base. The pre-arch value interval at the midpoint of the front window of the base is calculated based on the sinking amount simulation curve at the midpoint of the rear window of the base, and the pre-arch value interval at the midpoint of the rear window of the base is calculated based on the sinking amount simulation curve at the midpoint of the rear window of the base. The pre-arch value interval at the center point of the base is calculated based on the sinking amount simulation curve at the center point of the base. Then, the sinking amount of the server chassis 1 at the midpoint of the front window of the base is measured to determine whether the sinking amount of the server chassis 1 at the midpoint of the front window of the base falls within the pre-arch value interval at the midpoint of the front window of the base. If so, no adjustment is required. If not, a pre-arch shaping jig 3 is used to perform pre-arch shaping on the midpoint of the front window of the server chassis base so that the sinking amount of the server chassis 1 at the midpoint of the front window of the base falls within the pre-arch value interval at the midpoint of the front window of the base. Measure the sinking amount of the server chassis 1 at the midpoint of the base rear window, and determine whether the sinking amount of the server chassis 1 at the midpoint of the base rear window falls within the pre-arch value interval of the base rear window midpoint. If so, no adjustment is required. If not, use the pre-arch shaping fixture 3 to perform pre-arch shaping on the midpoint of the base rear window of the server chassis so that the sinking amount of the server chassis 1 at the midpoint of the base rear window falls within the pre-arch value interval of the base rear window midpoint. Measure the sinking amount of the server chassis 1 at the center point of the base, and determine whether the sinking amount of the server chassis 1 at the center point of the base falls within the pre-arch value interval of the base center. If so, no adjustment is required. If not, use the pre-arch shaping fixture 3 to perform pre-arch shaping on the center point of the base of the server chassis so that the sinking amount of the server chassis 1 at the center point of the base falls within the pre-arch value interval of the base center. By making the preset points include the midpoint of the base front window, the midpoint of the base rear window, and the base center, the sinking amount of the server chassis 1 can be tested and pre-arched in all directions.

[0064] In one embodiment, the above step S3 specifically includes:

[0065] Place the bottom surface of the server chassis 1 on the platform 2, and use a measuring instrument to measure the gap between the midpoint of the front window of the base, the midpoint of the rear window of the base, and the platform 2;

[0066] Turn the server chassis 1 over so that its bottom faces upward, place the matching block 5 in the middle of the bottom of the server chassis 1, and use a measuring instrument to measure the gap between the center point of the bottom of the server chassis 1 and the matching block 5.

[0067] In this embodiment, the bottom surface of the server chassis 1 is placed on the platform 2, and a measuring instrument is used to measure the gaps between the midpoints of the front window of the base and the midpoints of the rear window of the base and the platform 2. The gap between the midpoint of the front window of the base and the platform 2 is the amount of sinking of the server chassis 1 at the midpoint of the front window of the base, and the gap between the midpoint of the rear window of the base and the platform 2 is the amount of sinking of the server chassis 1 at the midpoint of the rear window of the base. The server chassis 1 is flipped over so that its bottom surface faces upward, and the mating block 5 is placed in the middle of the bottom surface of the server chassis 1. A measuring instrument is used to measure the gap between the center point of the bottom surface of the server chassis 1 and the mating block 5. The gap between the center point of the bottom surface of the server chassis 1 and the mating block 5 is the amount of sinking of the server chassis 1 at the center point of the base. Therefore, it is convenient to measure the sinking of the server chassis 1 at a preset point without the need for a dedicated sinking test instrument, which can save testing costs.

[0068] In one embodiment, the platform 2 refers to a table with a flat surface, and may be a marble platform 2 .

[0069] Specifically in one embodiment, the matching block 5 is a long straight block in the shape of a cuboid.

[0070] Specifically in one embodiment, the measuring instrument is a plug gauge 4. The above step S3 specifically includes:

[0071] like Figure 1 and Figure 2 , place the bottom surface of the server chassis 1 on the platform 2, and use the feeler gauge 4 to measure the gap between the midpoint of the front window of the base and the midpoint of the rear window of the base and the platform 2;

[0072] like Figure 3 , turn the server chassis 1 over so that its bottom is facing upward, place the matching block 5 in the middle of the bottom of the server chassis 1, and use the feeler gauge 4 to measure the gap between the center point of the bottom of the server chassis 1 and the matching block 5.

[0073] The measuring instrument is a plug gauge 4, which has a low cost.

[0074] In other alternative embodiments, the measuring instrument may also be a tape measure.

[0075] In one embodiment, in the above step S5, the server chassis 1 is pre-arched using the pre-arch shaping jig 3 so that the sinking amount of the server chassis 1 at the preset point falls within the pre-arch value range at the preset point, including:

[0076] S51, contacting the pre-arch shaping jig 3 with a preset point;

[0077] S52, placing a matching block 5 on one side of the preset point;

[0078] S53, applying a pre-arching force to a preset point by using the pre-arching shaping fixture 3 and maintaining it for a preset time;

[0079] S54, using a measuring instrument to measure the gap between the matching block 5 and the preset point;

[0080] S55, determining whether the gap between the matching block 5 and the preset point falls within the pre-arch value interval at the preset point;

[0081] S56: If the gap between the matching block 5 and the preset point does not fall within the pre-arch value interval at the preset point, repeat step S53.

[0082] In this embodiment, a matching block 5 is placed on one side of the preset point; a pre-arch force is applied to the preset point by the pre-arch shaping jig 3 and maintained for a preset time, so as to avoid rebound of the pre-arch shaping jig 3 after leaving the preset point; after the pre-arch force is applied to the preset point by the pre-arch shaping jig 3 and maintained for a preset time, the gap between the matching block 5 and the preset point is measured to determine whether the gap between the matching block 5 and the preset point falls within the pre-arch value interval at the preset point; if the gap between the matching block 5 and the preset point falls within the pre-arch value interval at the preset point, it indicates that the pre-arch shaping is in place; if the gap between the matching block 5 and the preset point does not fall within the pre-arch value interval at the preset point, the pre-arch shaping is repeated to ensure that the pre-arch shaping is in place.

[0083] In one embodiment, after applying a pre-arching force to a predetermined point using the pre-arching shaping jig 3 and maintaining it for a predetermined time, a feeler gauge 4 is used to measure the gap between the mating block 5 and the predetermined point. Alternatively, after placing the mating block 5 on one side of the predetermined point, the feeler gauge 4 is simultaneously placed, allowing for real-time measurement of the gap between the mating block 5 and the predetermined point.

[0084] In one embodiment, the method further comprises:

[0085] The server chassis 1 after pre-arch shaping is randomly inspected according to a preset ratio for quality inspection.

[0086] In this embodiment, the server chassis 1 after pre-arch shaping is randomly inspected for quality according to a preset ratio, so as to ensure that the sinking amount of the server chassis 1 after pre-arch shaping meets the requirements and does not cause significant squeezing, friction, and interference effects on the adjacent servers below it, which can provide a reference and quality traceability basis for subsequent production.

[0087] Specifically, it is necessary to perform sinking test and pre-arch shaping on all server chassis 1 according to the above method. For the server chassis 1 after pre-arch shaping, it is only necessary to conduct quality inspection by spot checking according to a certain proportion.

[0088] It should be noted that quality inspection of the server chassis 1 after pre-arch shaping specifically refers to configuring the server chassis 1 after pre-arch shaping with a counterweight equivalent to the server's fully loaded state, and testing the sinking amount through a sinking tester to see whether the sinking amount meets the requirements.

[0089] The server chassis sinkage test and pre-arch shaping method provided in this embodiment specifically includes the following steps:

[0090] In the simulation software, the boundary conditions are set to constrain the three axial degrees of freedom of the edges on both sides of the base of the server chassis 1 model, the damping parameter of the simulation model is set to 50, and the solution time is set to 0.1s. The sinking simulation curves at the midpoint of the front window of the base, the sinking simulation curves at the midpoint of the rear window of the base, and the sinking simulation curves at the center point of the base are obtained.

[0091] The lowest value in the sinking amount simulation curve at the midpoint of the front window of the base is used as the server no-load and full-load difference δ, and the sum of the expected sinking amount interval at the midpoint of the front window of the base and the server no-load and full-load difference δ is obtained to obtain the pre-arch value interval at the midpoint of the front window of the base. For example, the server no-load and full-load difference δ at the midpoint of the front window of the base is 0.5mm, and the expected sinking amount interval at the midpoint of the front window of the base is 0 to -0.5mm. Therefore, the pre-arch value interval at the midpoint of the front window of the base can be calculated to be +0.5mm to 0; the lowest value in the sinking amount simulation curve at the midpoint of the rear window of the base is used as the server no-load and full-load difference δ, and the sum of the expected sinking amount interval at the midpoint of the rear window of the base and the server no-load and full-load difference δ is obtained to obtain the pre-arch value interval at the midpoint of the rear window of the base, for example The difference δ between the server no-load and full-load at the midpoint of the rear window of the base is 1mm, and the expected value range of the sinking at the midpoint of the rear window of the base is 0 to -0.5mm. Therefore, the pre-arch value range at the midpoint of the front window of the base can be calculated to be +1.0mm to +0.5mm; the lowest value in the sinking simulation curve at the center point of the base is taken as the server no-load and full-load difference δ, and the sum of the expected value range of the sinking at the center point of the base and the server no-load and full-load difference δ is obtained to obtain the pre-arch value range at the center point of the base. For example, the difference δ between the server no-load and full-load at the center point of the base is 1.5mm, and the expected value range of the sinking at the center point of the base is 0 to -0.5mm. Therefore, the pre-arch value range at the midpoint of the front window of the base can be calculated to be +1.5mm to +1.0mm.

[0092] Place the bottom surface of the server chassis 1 on the platform 2, and use a measuring instrument to measure the gap between the midpoint of the front window of the base and the midpoint of the rear window of the base and the platform 2 respectively. The gap between the midpoint of the front window of the base and the platform 2 is the sinking amount of the server chassis 1 at the midpoint of the front window of the base, and the gap between the midpoint of the rear window of the base and the platform 2 is the sinking amount of the server chassis 1 at the midpoint of the rear window of the base; turn the server chassis 1 over so that its bottom surface faces upward, place the mating block 5 in the middle of the bottom surface of the server chassis 1, and use a measuring instrument to measure the gap between the center point of the bottom surface of the server chassis 1 and the mating block 5. The gap between the center point of the bottom surface of the server chassis 1 and the mating block 5 is the sinking amount of the server chassis 1 at the center point of the base.

[0093] Determine whether the sinking amount of the server chassis 1 at the midpoint of the front window of the base falls within the pre-arch value interval at the midpoint of the front window of the base. If so, no adjustment is required. If not, use the pre-arch shaping fixture 3 to pre-arch the midpoint of the front window of the server chassis base, contact the pre-arch shaping fixture 3 with the midpoint of the front window of the base, place the matching block 5 on one side of the midpoint of the front window of the base, apply a pre-arch force to the midpoint of the front window of the base through the pre-arch shaping fixture 3 and maintain it for a preset time. Use a measuring instrument to measure the gap between the matching block 5 and the midpoint of the front window of the base, and determine whether the gap between the matching block 5 and the midpoint of the front window of the base falls within the pre-arch value interval at the midpoint of the front window of the base. If the gap between the matching block 5 and the midpoint of the front window of the base does not fall within the pre-arch value interval at the midpoint of the front window of the base, repeat the pre-arch shaping until the sinking amount of the server chassis 1 at the midpoint of the front window of the base falls within the pre-arch value interval at the midpoint of the front window of the base. Determine whether the amount of sinking of the server chassis 1 at the midpoint of the base rear window falls within the pre-arch value interval at the midpoint of the base rear window. If so, no adjustment is required. If not, use a pre-arch shaping fixture 3 to pre-arch the midpoint of the base rear window of the server chassis, contact the pre-arch shaping fixture 3 with the midpoint of the base rear window, place a matching block 5 on one side of the midpoint of the base rear window, apply a pre-arch force to the midpoint of the base rear window through the pre-arch shaping fixture 3 and maintain it for a preset time. Use a measuring instrument to measure the gap between the matching block 5 and the midpoint of the base rear window, and determine whether the gap between the matching block 5 and the midpoint of the base rear window falls within the pre-arch value interval at the midpoint of the base rear window. If the gap between the matching block 5 and the midpoint of the base rear window does not fall within the pre-arch value interval at the midpoint of the base rear window, repeat the pre-arch shaping until the amount of sinking of the server chassis 1 at the midpoint of the base rear window falls within the pre-arch value interval at the midpoint of the base rear window. Determine whether the sinking amount of the server chassis 1 at the center point of the base falls within the pre-arch value interval at the center point of the base. If so, no adjustment is required. If not, use a pre-arch shaping fixture 3 to pre-arch the center point of the server chassis base, contact the pre-arch shaping fixture 3 with the center point of the base, place a matching block 5 on one side of the center point of the base, apply a pre-arch force to the center point of the base through the pre-arch shaping fixture 3 and maintain it for a preset time. Use a measuring instrument to measure the gap between the matching block 5 and the center point of the base, and determine whether the gap between the matching block 5 and the center point of the base falls within the pre-arch value interval at the center point of the base. If the gap between the matching block 5 and the center point of the base does not fall within the pre-arch value interval at the center point of the base, repeat the pre-arch shaping until the sinking amount of the server chassis 1 at the center point of the base falls within the pre-arch value interval at the center point of the base.

[0094] The server chassis sinkage test and pre-arch shaping method provided in this embodiment has the following beneficial effects:

[0095] 1. High efficiency and low cost: By combining simulation analysis with empty chassis measurement, the tedious counterweight steps and expensive dedicated test instruments in traditional fully loaded sinkage tests are eliminated, significantly shortening test time, reducing test costs, and improving production efficiency. It is suitable for measuring 100% of the chassis on the production line.

[0096] 2. Improve quality stability: Accurate pre-arch value calculation and pre-arch shaping adjustment can effectively control the sinking amount of the server chassis 1, improve the sag stability value of the mass-produced server chassis 1, ensure the stability and service life of the internal components of the server, and improve the overall quality of the server.

[0097] 3. Easy to implement and promote: This method is simple to operate and easy to implement and promote in actual production, and can bring significant economic benefits and quality improvements to server manufacturers.

[0098] The embodiment of the present application also provides a pre-arch shaping fixture 3 for pre-arching the server chassis 1, such as Figure 4 and Figure 5 As shown, it includes a support beam 301 , a cantilever beam 302 and a stud 303 .

[0099] Among them, two support beams 301 are symmetrically provided, and the server chassis 1 is suitable for being placed between the two support beams 301; the cantilever beam 302 is connected to the top of the two support beams 301, and the cantilever beam 302 is provided with a threaded hole; the stud 303 is rotatably provided in the threaded hole, and the first end of the stud 303 is suitable for abutting against the server chassis 1.

[0100] In this embodiment, since the server chassis 1 is suitable for being placed between the two support beams 301, the server chassis 1 can be clamped to prevent the server chassis 1 from shaking. The cantilever beam 302 is provided with a threaded hole, and the stud 303 is rotatably provided in the threaded hole. The first end of the stud 303 is suitable for abutting against the server chassis 1, so rotating the stud 303 can apply a pre-arch force to the server chassis 1, and after loosening the stud 303, the stud 303 can remain in its original position, thereby maintaining the pre-arch force applied to the server chassis 1.

[0101] Specifically in one embodiment, in the above-mentioned server chassis sinking test and pre-arch shaping method, the pre-arch shaping fixture 3 applies a pre-arch force to the preset point and maintains it for a preset time, including rotating the stud 303 to make the stud 303 drop 1 mm and maintain it for 10 seconds, and then rotating the stud 303 in the opposite direction until the first end of the stud 303 is no longer in contact with the base, and the feeler gauge 4 is used again to measure the gap between the preset point and the mating block 5.

[0102] In one embodiment, a handle 304 is connected to the second end of the stud 303 .

[0103] In this embodiment, by connecting the handle 304 to the second end of the stud 303 , the user can rotate the handle 304 to rotate the stud 303 , which is convenient for the user to operate.

[0104] In one embodiment, the pre-arch shaping jig 3 further includes a support base 305 connected to an end of the support beam 301 away from the cantilever beam 302 , and the support base 305 is suitable for placing the server chassis 1 .

[0105] In this embodiment, the server chassis 1 is placed on the support base 305 , and two support beams 301 are used to limit the two sides of the server chassis 1 , thereby preventing the server chassis 1 from shaking.

[0106] The specific steps of performing pre-arch shaping with the pre-arch shaping jig 3 provided in this embodiment are as follows:

[0107] a. Rotate the handle 304 to bring the first end of the stud 303 into contact with the point in the preset position where pre-arch shaping is required;

[0108] b. Place the matching block 5 on one side of the point where pre-arch shaping is required;

[0109] c. Rotate the handle 304 to lower the stud 303 by 1 mm, maintain this position for 10 seconds, and then rotate the handle 304 in the opposite direction until the first end of the stud 303 is no longer in contact with the base.

[0110] d. Use the feeler gauge 4 to measure the gap between the mating block 5 and the point after pre-arch shaping;

[0111] e. Determine whether the gap between the matching block 5 and the point after pre-arch shaping falls within the pre-arch value interval at the preset point;

[0112] f. If the gap between the matching block 5 and the point after pre-arch shaping does not fall within the pre-arch value interval at the preset point, repeat steps c, d, e, and f until the gap between the matching block 5 and the point after pre-arch shaping falls within the pre-arch value interval at the preset point.

[0113] Specific as Figure 4 As shown, when the matching block 5 is placed on one side of the point that requires pre-arch shaping, the matching block 5 contacts the support beam 301 , and the support beam 301 can locate the position of the matching block 5 .

[0114] The above is a detailed introduction to a server chassis sinking test and pre-arch shaping method and a pre-arch shaping jig 3 provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A server chassis sinking amount test and pre-arch shaping method, characterized in that: include: Using simulation software to simulate the server chassis (1) model under full load, and obtaining sinking simulation curves at preset points respectively; Calculate the pre-arch value interval at the preset point according to the simulation curve at the preset point; Measuring the sinking amount of the server chassis (1) at a preset point; Determining whether the sinking amount of the server chassis (1) at a preset point falls within a pre-arch value interval at the preset point; If not, a pre-arch shaping jig (3) is used to pre-arch the server chassis (1) so that the sinking amount of the server chassis (1) at the preset point falls within the pre-arch value range at the preset point.

2. The server chassis sinking amount testing and pre-arch shaping method according to claim 1, characterized in that: Calculating the pre-arch value interval at the preset point according to the simulation curve at the preset point includes: The lowest value in the simulation curve is taken as the difference between the server no-load and full-load, and the sum of the expected value interval of the sinking at the preset point and the difference between the server no-load and full-load is obtained to obtain the pre-arch value interval at the preset point.

3. The server chassis sinking amount testing and pre-arch shaping method according to claim 1, characterized in that: The method further comprises: The stable value in the simulation curve is used as the sinking amount of the server under full load; Whether the structural design of the server chassis (1) meets the requirements is determined based on the sinking amount of the server when fully loaded.

4. The server chassis sinking amount testing and pre-arch shaping method according to claim 1, characterized in that: The full load simulation of the server chassis (1) includes: The boundary conditions are set to constrain the three axial degrees of freedom of the edges on both sides of the server chassis (1) base, the damping parameters of the simulation model are set to preset values, and the solution time is set to a preset time.

5. The server chassis sinking amount testing and pre-arch shaping method according to any one of claims 1 to 4, characterized in that: The preset points include the midpoint of the front window of the base, the midpoint of the rear window of the base, and the center point of the base.

6. The server chassis sinking amount testing and pre-arch shaping method according to claim 5, characterized in that: The method of measuring the sinking amount of the server chassis (1) at a preset point comprises: Place the bottom surface of the server chassis (1) on the platform (2), and use a measuring instrument to measure the gaps between the midpoints of the front window of the base and the midpoints of the rear window of the base and the platform (2); The server chassis (1) is turned over so that its bottom is facing upward, and the matching block (5) is placed in the middle of the bottom of the server chassis (1). The gap between the center point of the bottom of the server chassis (1) and the matching block (5) is measured using a measuring instrument.

7. The server chassis sinking amount testing and pre-arch shaping method according to claim 6, characterized in that: The server chassis (1) is pre-arched using a pre-arch shaping jig (3) so that the sinking amount of the server chassis (1) at a preset point falls within the pre-arch value range at the preset point, including: The pre-arch shaping jig (3) is brought into contact with a preset point; A matching block (5) is placed on one side of the preset point; Applying a pre-arching force to a preset point through a pre-arching shaping jig (3) and maintaining it for a preset time; Using a measuring instrument to measure the gap between the matching block (5) and the preset point; Determining whether the gap between the matching block (5) and the preset point falls within the pre-arch value interval at the preset point; If not, repeat the steps of applying the pre-arching force to the preset point through the pre-arch shaping fixture (3) and maintaining the pre-arching force for a preset time.

8. The server chassis sinking amount testing and pre-arch shaping method according to claim 6 or 7, characterized in that: The method further comprises: The server chassis (1) after pre-arch shaping is randomly inspected according to a preset ratio for quality inspection.

9. A pre-arch shaping jig for pre-arching a server chassis (1), characterized in that: include: Two support beams (301) are symmetrically provided, and the server chassis (1) is suitable for being placed between the two support beams (301); a cantilever beam (302) connected to the tops of the two support beams (301), wherein the cantilever beam (302) is provided with a threaded hole; A stud (303) is rotatably arranged in the threaded hole, and a first end of the stud (303) is suitable for abutting against the server chassis (1).

10. The pre-arch shaping jig according to claim 9, characterized in that: The second end of the stud (303) is connected to a handle (304).

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