Method for realizing ultra-high precision cooling plate post-brazing finished product tolerance based on compensation

Abstract

The application discloses a kind of based on compensation and realize the method for high-precision cooling plate brazing after product tolerance, which comprises the following steps: S1, the core parameters of cooling plate are collected, including structural parameters, material characteristics and brazing process parameters, and the collected parameters are standardized pretreated;S2, brazing deformation rule test and simulation analysis, select target base material into furnace brazing, and calculate the deformation of cooling plate after brazing;When the deformation of cooling plate does not meet the requirements, the target base material is reselected and compensated processing is carried out into furnace brazing, and the deformation of cooling plate after brazing is calculated;Until the deformation of cooling plate meets the requirements;S3, save the corresponding compensation data under the core parameters of the cooling plate, establish a personalized deformation prediction model, and add to the personalized deformation prediction model database.The method improves product pass rate and reduces production cost.

Description

Technical Field

[0001] This invention relates to the field of cooling plate manufacturing technology, and more specifically to a method for achieving ultra-high precision cooling plate brazing tolerances after the final product is manufactured, based on compensation. Background Technology

[0002] As a core heat dissipation component, the structural precision of the cooling plate directly affects subsequent processes. In scenarios requiring friction stir welding, the cooling plate often needs to meet ultra-high precision tolerance requirements within ±0.3mm. Brazing is a key process in the manufacturing of cooling plates. The brazing process uses high-temperature heating to melt the filler metal and fill the gaps between the workpieces, achieving a metallurgical bond between the various components.

[0003] Currently, the mainstream methods for controlling the brazing tolerances of cooling plates in the industry mainly rely on the following two types: First, optimize the brazing process parameters, such as heating rate, holding temperature, and cooling rate, to reduce thermal deformation by precisely controlling the temperature field distribution. Second, use laser cutting equipment to process the brazed finished product, adding an extra step.

[0004] However, existing technologies have significant shortcomings: Limitations of process parameter optimization: During the brazing process, the difference in thermal expansion coefficient caused by the inconsistent thickness of the upper and lower plates of the cooling plate, the release of structural stress, and the uneven flow of brazing filler metal interact with each other. It is difficult to completely offset the deformation error by simply adjusting the process parameters. Especially for complex structure cooling plates, the finished product tolerance is difficult to be stably controlled below ±0.5mm, which cannot meet the ultra-high precision requirements. Laser post-processing: Existing technologies mostly use secondary cutting of finished products, but this method adds an extra step and consumes manpower and resources.

[0005] These problems result in low finished product qualification rate and high production cost after brazing of existing cooling plates, which seriously restricts their production efficiency and qualification rate. Summary of the Invention

[0006] The purpose of this invention is to provide a method for achieving ultra-high precision tolerance of the finished product after brazing of cooling plates based on compensation. This method solves the problems of large tolerance deviation and unstable precision control of the brazed cooling plates in the prior art. By establishing a personalized deformation prediction model, designing a multi-dimensional compensation scheme, and optimizing the compensation implementation process, the full-size tolerance of the finished product after brazing of the cooling plate can be stably controlled within ±0.3mm, thereby improving the product qualification rate, reducing production costs, and meeting the ultra-high precision requirements of cooling plates in high-end fields.

[0007] To achieve the above objectives, the present invention provides a method for achieving high-precision finished product tolerances after brazing of ultra-high-precision cooling plates based on compensation. The method includes the following steps: S1, collect core parameters of the cooling plate, including structural parameters, material properties and brazing process parameters, and perform standardized preprocessing on the collected parameters to remove abnormal data; S2, Experimental and simulation analysis of brazing deformation law: Select target substrate for brazing in furnace and calculate the deformation of cooling plate after brazing; When the deformation of the cooling plate does not meet the requirements, a new target substrate is selected and compensated before being brazed in the furnace, and the deformation of the cooling plate after brazing is calculated. Continue until the deformation of the cooling plate meets the requirements; S3, save the compensation data corresponding to the core parameters of the cooling plate, establish a personalized deformation prediction model, and add it to the personalized deformation prediction model database.

[0008] Preferably, when selecting the target substrate for the first time in step S2, the selected target substrate is pre-compensated to reduce the number of brazing deformation law tests.

[0009] Preferably, the pre-compensation data is based on a personalized deformation prediction model database.

[0010] Preferably, the structural parameters include plate length L, width W, and appearance features.

[0011] Preferably, the material properties include flat plate material and flow channel plate material.

[0012] Preferably, the brazing process parameters include: brazing filler metal type, brazing temperature T, holding time t, heating rate, cooling rate, and protective gas purity P.

[0013] Preferably, the deformation of the cooling plate includes length deformation ΔL and width deformation ΔW. The deformation data measured by the experiment is compared with the theoretical length and width to obtain the compensation amount.

[0014] Preferably, the compensation process uses laser cutting to process the cooling plate substrate according to the calculated compensation amount, resulting in a compensated substrate.

[0015] Preferably, the finished product inspection involves a full-dimensional tolerance inspection of the brazed cooling plate, using a coordinate measuring machine to measure flatness and perpendicularity, and a coordinate measuring machine to measure length and width position deviations.

[0016] According to the above technical solution, the present invention provides a method for achieving ultra-high precision cooling plate brazing tolerance after the product is finished, based on compensation. This method solves the problems of large tolerance deviation and unstable precision control of the cooling plate after brazing in the prior art. By establishing a personalized deformation prediction model, designing a multi-dimensional compensation scheme and optimizing the compensation implementation process, the full-size tolerance of the finished product after the cooling plate is brazed can be stably controlled within ±0.3mm, thereby improving the product qualification rate, reducing production costs, and meeting the ultra-high precision requirements of cooling plates in high-end fields.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of the brazing tolerance control for ultra-high precision cooling plates based on compensation. Figure 2 This is a qualified size for a cooling plate product; Figure 3 yes Figure 2 Compensation dimensions for the intermediate cooling plate product. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] In this invention, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0021] See Figure 1 The method for achieving ultra-high precision cooling plate brazing tolerances based on compensation includes the following steps: S1, collecting core parameters of the cooling plate, including structural parameters, material properties, and brazing process parameters, and performing standardized preprocessing on the collected parameters to remove abnormal data, such as parameters exceeding the normal material property range; S2, conducting brazing deformation law experiments and simulation analysis, selecting a target substrate for brazing in the furnace, and calculating the deformation of the cooling plate after brazing; when the deformation of the cooling plate does not meet the requirements, reselecting a target substrate and performing compensation processing before brazing in the furnace, and calculating the deformation of the cooling plate after brazing; until the deformation of the cooling plate meets the requirements; S3, saving the compensation data corresponding to the core parameters of the cooling plate, establishing a personalized deformation prediction model, and adding it to the personalized deformation prediction model database.

[0022] This invention achieves ultra-high precision control of the finished product tolerance after brazing of cooling plates through a closed-loop process of "deformation data acquisition - compensation scheme design - compensation implementation - brazing verification". The core logic is as follows: based on the structural parameters, material properties, and brazing process parameters of the cooling plate, the brazing deformation law is obtained through a combination of experiments and simulations. A personalized deformation prediction model is established, and multi-dimensional compensation structures and parameters are designed based on the prediction results. The substrate is compensated before brazing, and the optimized brazing process is implemented so that the deformation during brazing is offset by the pre-compensation, ultimately obtaining an ultra-high precision finished product.

[0023] In this embodiment, when the target substrate is selected for the first time in step S2, the selected target substrate is pre-compensated to reduce the number of brazing deformation law tests.

[0024] In this implementation, the pre-compensation data is based on a personalized deformation prediction model database. By selecting compensation data with the same parameters or with similar parameters from the personalized deformation prediction model database, the number of brazing deformation pattern tests is reduced.

[0025] In this embodiment, the structural parameters include the plate length L, width W, and appearance features. The appearance features mainly refer to the shape of the water-cooled plate.

[0026] In this embodiment, the material properties include the material of the flat plate and the material of the flow channel plate. For example, 3003 aluminum alloy is used as the material for both the flat plate and the flow channel plate.

[0027] In this embodiment, the brazing process parameters include: brazing filler metal type, brazing temperature T, holding time t, heating rate, cooling rate, and shielding gas purity P. The shielding gas, such as nitrogen or argon, has a purity between 99.9% and 99.999%.

[0028] In this embodiment, the deformation of the cooling plate includes length deformation ΔL and width deformation ΔW. The deformation data measured experimentally is compared with the theoretical length and width to obtain the compensation amount. For example, if the size before brazing is a×b and the size after brazing is c×d, the compensation size is (ca)×(db).

[0029] In this embodiment, the compensation process employs laser cutting (with an accuracy of ±0.2mm) to process the cooling plate substrate according to the calculated compensation amount, resulting in a compensated substrate. After processing, the compensation dimensions and structure of the substrate are inspected using vernier calipers to ensure compliance with design requirements. In this implementation, finished product inspection involves performing full-dimensional tolerance testing on the brazed cooling plate. A coordinate measuring machine (CMM) is used to measure flatness and perpendicularity, and a CMM is used to measure length and width positional deviations. Tolerance data for each dimension are recorded. If the inspection results do not meet design requirements (tolerances exceeding ±0.3mm), the inspection data is fed back to project personnel, compensation amounts and process parameters are adjusted, and verification tests continue until the finished product tolerances meet the requirements.

[0030] In this invention, the compensated substrate is assembled according to the conventional assembly process, placed in a vacuum brazing furnace, and brazed according to the optimized process parameters.

[0031] refer to Figure 2 and Figure 3 , Figure 2 The main structure of the cooling plate is marked with the plate length L and width W, clearly defining the definition and location of each structural parameter. Figure 3 To compensate for the dimensions, the length L and width W are specified.

[0032] The compensation coefficient k ranges from 0.05 to 0.2 and can be adjusted according to the length and width of the water-cooled plate. A larger value can be used for a longer water-cooled plate.

[0033] In addition to adjusting the dimensional compensation, the brazing deformation can also be optimized by adjusting the process parameters. With the addition of dimensional compensation, the process parameters can be fine-tuned to achieve better results.

[0034] Compared with existing cooling plate brazing tolerance control technology, the beneficial effects of the present invention are as follows: Significantly improved tolerance control accuracy: By establishing deformation compensation, the brazing deformation of the cooling plate is accurately predicted. Combined with compensation schemes, such as one or more of dimensional compensation, structural compensation, or process compensation, the overall dimensional tolerance of the finished product is stably controlled within ±0.3mm. Compared with the tolerance accuracy of ±0.5mm-±1mm of the existing technology, the improvement exceeds 60%. Experimental verification shows that the qualified rate of the cooling plate produced by the method of this invention has increased from 65%-75% of the existing technology to over 95%. The compensation is highly targeted and versatile: a brazing deformation table is established based on the length, width and process parameters of the cooling plate, avoiding the blindness of traditional experience-based allowances. It can be adapted to the personalized deformation patterns of cooling plates of different specifications and materials. By adjusting the compensation amount and process parameters, it can be quickly adapted to new cooling plate products without redesigning the entire control scheme, thus reducing the cost of technology iteration. Reduced production costs: Increased finished product qualification rate reduces manpower loss in processes and lowers raw material consumption; precise compensation design avoids excessive processing allowance, reducing workload in subsequent processing steps, improving processing efficiency by more than 30%, and reducing unit product processing costs by 20%-25%; Improved process stability: Through a closed-loop control process, the detection data feedback → compensation optimization → compensation correction can correct deviations in the brazing process in real time. Even when there are slight fluctuations in process parameters, the finished product tolerance can still be guaranteed to meet the requirements, thus improving the stability of mass production.

[0035] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0037] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for achieving high-precision finished product tolerances after brazing of ultra-high-precision cooling plates based on compensation, characterized in that, The method includes the following steps: S1, collect core parameters of the cooling plate, including structural parameters, material properties and brazing process parameters, and perform standardized preprocessing on the collected parameters to remove abnormal data; S2, Experimental and simulation analysis of brazing deformation law: Select target substrate for brazing in furnace and calculate the deformation of cooling plate after brazing; When the deformation of the cooling plate does not meet the requirements, a new target substrate is selected and compensated before being brazed in the furnace, and the deformation of the cooling plate after brazing is calculated. Continue until the deformation of the cooling plate meets the requirements; S3, save the compensation data corresponding to the core parameters of the cooling plate, establish a personalized deformation prediction model, and add it to the personalized deformation prediction model database.

2. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, When selecting the target substrate for the first time in step S2, pre-compensation is performed on the selected target substrate to reduce the number of brazing deformation law tests.

3. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 2, characterized in that, The pre-compensation data is based on a database of personalized deformation prediction models.

4. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, The structural parameters include plate length L, width W, and appearance features.

5. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, The material properties include flat plate material and flow channel plate material.

6. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, The brazing process parameters include: brazing filler metal type, brazing temperature T, holding time t, heating rate, cooling rate, and protective gas purity P.

7. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, The deformation of the cooling plate includes the length deformation ΔL and the width deformation ΔW. The deformation data measured by the experiment is compared with the theoretical length and width to obtain the compensation amount.

8. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, The compensation process uses laser cutting to process the cooling plate substrate according to the calculated compensation amount, resulting in a compensated substrate.

9. The method for achieving high-precision cooling plate brazing tolerances based on compensation according to claim 1, characterized in that, Finished product inspection involves full-dimensional tolerance testing of the brazed cooling plate, using a coordinate measuring machine to measure flatness and perpendicularity, and a coordinate measuring machine to measure length and width positional deviations.

Images