Box part brazing locking structure

Abstract

The invention relates to the field of box part machining, and discloses a box part brazing locking structure which comprises a second brazing part, a welding face assembly is arranged on the periphery of the second brazing part and used for improving brazing firmness and sealing performance, a first brazing part is installed at the top end of the second brazing part through a locking countersunk bolt, and a second brazing part is installed at the top end of the first brazing part through a locking countersunk bolt. A locking assembly is arranged on the periphery of the first brazing piece and used for improving the connecting strength and stability between the first brazing piece and the second brazing piece, the brazing face assembly comprises an X-direction brazing face, the X-direction brazing face is arranged at the top end of the second brazing piece, and the first brazing piece and the second brazing piece are both made of alloy aluminum. According to the method, the first brazing piece and the second brazing piece are locked through the locking thickness of the locking countersunk bolt larger than 20 mm, the brazing face is prevented from generating relative displacement in a high-temperature vacuum furnace, and the problem that the strength of a brazing layer is reduced due to temperature changes is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of box part processing, and particularly relates to a box part brazing locking structure. BACKGROUND

[0002] Aluminum alloy box is a kind of part widely used in various industrial equipment, and its structural strength and sealing property have important influence on the performance and service life of the equipment. In the manufacturing process of the aluminum alloy box, brazing is a common connection process, which connects two or more metal parts through brazing material to form a whole.

[0003] After a large amount of search, it is found that in the prior art, the general brazing part aluminum alloy material is welded into a whole by a vacuum brazing method, and the brazing part has a water channel around it, so the control requirement for the size in brazing is higher. The brazing part is heated to about 600 DEG C in the vacuum furnace, which will cause a large size deformation in the Y direction. The top locking will cause the brazing part to be restricted in the Y direction expansion, so that the size is reduced after cooling, thereby causing the internal flow channel of the brazing part to be abnormally processed, and the welding quality is reduced. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a box part brazing locking structure, which aims to improve the problem of "reduced welding quality" in the prior art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: the box part brazing locking structure comprises a brazing part two, a welding surface assembly is arranged on the periphery of the brazing part two, the welding surface assembly is used to improve the firmness and sealing property of brazing, a brazing part one is arranged on the top end of the brazing part two through a locking countersunk head bolt, a locking assembly is arranged on the periphery of the brazing part one, the locking assembly is used to improve the connection strength and stability between the brazing part one and the brazing part two, the welding surface assembly comprises an X-direction brazing surface, the X-direction brazing surface is arranged on the top end of the brazing part two, and the materials of the brazing part one and the brazing part two are both set as aluminum alloy.

[0006] Further description of the above technical scheme is as follows:

[0007] The welding surface assembly further comprises a Y-direction brazing surface, the Y-direction brazing surface is arranged on the left side of the brazing part two, the Y-direction brazing surface and the X-direction brazing surface form a vertical welding surface, the vertical welding surface is more stable during welding, so that the welding effect is better, the locking assembly comprises an X-direction locking, the X-direction locking is arranged on the left side of the brazing part one, and the locking assembly further comprises a Y-direction locking, the Y-direction locking is arranged on the top end of the brazing part one.

[0008] Further description of the above technical scheme is as follows:

[0009] The locking countersunk bolt is made of stainless steel, which has high strength and corrosion resistance.

[0010] As a further description of the above technical solution:

[0011] The brazed part is also provided with a counterweight preload surface at one end, which is used to provide additional pressure and stability during the brazing process. The number of locking countersunk bolts is set to multiple sets, the Y-axis brazing surface is set to three, the X-axis brazing surface is set to four, and the counterweight preload surface is a rectangular plane, the size of which is set according to actual needs to ensure that sufficient pressure and stability can be provided during the brazing process.

[0012] As a further description of the above technical solution:

[0013] The locking countersunk bolt has a locking thickness greater than 20mm.

[0014] The brazing and locking method for housing parts includes the following steps:

[0015] S1: Material Preparation

[0016] Prepare brazing part 1, brazing part 2, and locking countersunk bolts, and reserve multiple threaded holes on brazing part 1 and brazing part 2 as locking points for use by the locking countersunk bolts. The locking countersunk bolts are made of stainless steel and have a thickness greater than 20mm. The surfaces of brazing part 1 and brazing part 2 are pickled to remove oil and oxide layers.

[0017] S2: Tool Preparation

[0018] Prepare brazing and testing equipment, and ensure that all equipment is in good working order to guarantee the smooth progress of the brazing process;

[0019] S3: Preparation of solder surface assembly

[0020] X-axis brazing surface and Y-axis brazing surface are prepared at the top and left side of the second brazing component, respectively, to form a vertical welding surface, so as to improve the brazing strength and sealing performance.

[0021] S4: Pre-assembly of brazed components

[0022] Place brazed part one on brazed part two, ensuring that the brazed surfaces in the X and Y directions are tightly fitted. The Y and X directions can be locked by pressing with external tools, which further ensures the sealing of the weld between brazed part one and brazed part two. Then, install the countersunk bolts through the reserved threaded holes to braze part one and brazed part two. In this step, it is necessary to ensure that the number and position distribution of the countersunk bolts are reasonable in order to achieve the best connection strength and stability.

[0023] S5: Brazing process

[0024] The brazing equipment is used to heat the brazing surface assembly, so that the aluminum alloy materials of brazing part one and brazing part two can be fused together under the action of the brazing surface assembly. During the brazing process, the counterweight pre-pressing surface is used to provide additional pressure and stability to ensure the welding quality.

[0025] S6: Quality Inspection

[0026] The brazed locking structure is subjected to quality inspection using testing equipment, including testing of welding quality, connection strength, stability, etc., to ensure that the brazed locking structure meets design and usage requirements.

[0027] As a further description of the above technical solution:

[0028] The X-axis and Y-axis brazing surfaces in S3 are prepared using CNC machining technology to ensure the accuracy and flatness of the welding surfaces, thereby improving the quality and reliability of the welding. The brazing method in S5 is friction stir welding, with the temperature controlled between 500℃ and 600℃. The heating time and heating rate are strictly controlled during the welding process to avoid defects such as cracks or pores, ensuring the strength and sealing of the welding.

[0029] As a further description of the above technical solution:

[0030] The brazing equipment in S2 adopts advanced digital control technology to achieve precise control of the welding process, improve welding quality and stability. At the same time, the brazing equipment is also equipped with an automated wire feeding system and an intelligent temperature control system to achieve automation and intelligence of the welding process, further improving production efficiency and quality.

[0031] As a further description of the above technical solution:

[0032] The design of the pre-pressure surface of the counterweight in S5 needs to take into account the thermal expansion effect during the brazing process to ensure that a stable and moderate pressure can be provided during the welding process to prevent welding deformation or cracks caused by thermal expansion.

[0033] As a further description of the above technical solution:

[0034] The quality inspection process in S6 requires the use of high-precision testing equipment and methods, including but not limited to X-ray inspection and ultrasonic testing, to ensure that key indicators such as the welding quality, connection strength, and stability of the brazed locking structure meet the design and usage requirements.

[0035] The present invention has the following beneficial effects:

[0036] 1. In this invention, the brazing parts one and two are locked by tightening the countersunk bolts with a locking thickness greater than 20mm. This prevents the brazing surfaces from shifting relative to each other in the high-temperature vacuum furnace and effectively reduces the decrease in brazing layer strength caused by temperature changes. In addition, the locking thickness of more than 20mm generates a pressing force on the brazing surfaces under the action of thermal expansion, so that the brazing surfaces are fully fused to the brazing parts one and two, ensuring the stability of the welding quality.

[0037] 2. In this invention, the welding is carried out by friction stir welding, which has the advantages of high welding efficiency, small welding deformation, and stable welding quality. At the same time, by controlling the welding temperature and welding speed, defects such as cracks and porosity generated during the welding process can be effectively avoided, ensuring the strength and sealing of the weld. The pre-pressure surface with counterweight provides additional pressure and stability during the brazing process, effectively preventing the generation of welding deformation and cracks, and improving the welding quality and reliability.

[0038] 3. In this invention, by preparing X-axis and Y-axis brazing surfaces and using CNC machining technology to ensure the accuracy and flatness of the welding surfaces, the quality and reliability of welding can be improved. In addition, advanced digital control technology and automated wire feeding system are used to achieve precise control and automation of the welding process, improve production efficiency and quality, and reduce the impact of human factors on welding quality. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the welding process of the brazing locking structure for the box-shaped parts in this invention;

[0040] Figure 2 This is a schematic diagram of the welding method for the brazing locking structure of the box-shaped parts in this invention.

[0041] Legend:

[0042] 1. Brazed component one; 2. Locking countersunk bolt; 3. Brazed component two; 4. Y-axis locking; 5. X-axis locking; 6. X-axis brazed surface; 7. Y-axis brazed surface; 8. Counterweight preload. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example:

[0045] Reference Figure 1This invention provides a brazing locking structure for a box-type component, including a second brazing component 3. A welding surface assembly is provided around the second brazing component 3 to improve the brazing strength and sealing. A first brazing component 1 is mounted on the top of the second brazing component 3 via a locking countersunk bolt 2. A locking assembly is provided around the first brazing component 1 to improve the connection strength and stability between the first brazing component 1 and the second brazing component 3. The welding surface assembly includes an X-direction brazing surface 6, which is located at the top of the second brazing component 3. The welding surface assembly also includes a Y-direction brazing surface 7, which is located on the left side of the second brazing component 3. The Y-direction brazing surface 7 and the X-direction brazing surface 6 form a vertical welding surface, which provides greater stability during welding and results in a better welding effect. The locking assembly includes an X-direction locking 5, which is located on the left side of the first brazing component 1. The locking assembly also includes a Y-direction locking 4, which is located at the top of the first brazing component 1.

[0046] Furthermore, both brazed component 1 and brazed component 2 are made of aluminum alloy, and the locking countersunk bolt 2 is made of stainless steel. The stainless steel locking countersunk bolt 2 has the characteristics of high strength and corrosion resistance.

[0047] Reference Figure 1 The top of the brazed part 1 is also provided with a counterweight preload surface 8, which is used to provide additional pressure and stability during the brazing process. The number of locking countersunk bolts 2 is set in multiple sets, and the locking thickness of the countersunk bolts 2 is greater than 20mm. There are three Y-axis brazing surfaces 7 and four X-axis brazing surfaces 6. The counterweight preload surface 8 is a rectangular plane, and its size is set according to actual needs to ensure that sufficient pressure and stability can be provided during the brazing process.

[0048] The present invention also provides a brazing locking method for housing parts, comprising the following steps:

[0049] S1: Material Preparation

[0050] Prepare brazing component 1 and brazing component 2. These are key components in the entire brazed structure, and their performance directly affects the final welding effect. When selecting brazing component 1, its material, size, and shape should be fully considered to ensure a perfect match with brazing component 2. Tighten the countersunk bolt 2. The countersunk bolt 2 plays a crucial role in fixing the brazed structure. To ensure its service life and performance, it is made of stainless steel with a thickness greater than 20mm to withstand various forces and deformations encountered during use. Multiple threaded holes are pre-drilled on brazing component 1 and brazing component 2 as locking points for tightening the countersunk bolt 2. These threaded holes will help improve the stability and reliability of the brazed joint. To ensure the welding quality of brazing component 1 and brazing component 2, their surfaces need to be acid-washed to remove oil and oxide layers. This step effectively removes oil and oxide layers from the surface of the brazed components, improving the cleanliness of the welding surface and thus improving the welding effect.

[0051] S2: Tool Preparation

[0052] Before brazing, thorough preparation is essential, including the preparation of brazing and testing equipment. The selection of brazing equipment is crucial, employing advanced digital control technology to achieve precise control of the welding process. This not only improves welding quality but also ensures the stability of the welding process. The brazing equipment is also equipped with an automated wire feeding system to ensure automated wire supply during the welding process, reducing errors from manual operation. Simultaneously, the addition of an intelligent temperature control system allows for precise temperature control during the welding process, thereby guaranteeing welding quality. Regarding the brazing equipment, the use of digital control technology enhances welding quality and stability. Digital control technology can monitor various parameters during the welding process in real time, such as temperature and pressure, and automatically adjust according to preset parameters to maintain the welding process in an optimal state. The automated wire feeding system automatically controls the feeding speed and amount of brazing filler metal, ensuring a stable supply during the welding process. This not only improves production efficiency but also reduces welding quality problems caused by human error. In terms of intelligent temperature control, the system automatically adjusts according to actual temperature changes during the welding process, keeping the temperature within the optimal range. This helps improve welding quality and reduce the occurrence of welding defects;

[0053] S3: Preparation of solder surface assembly

[0054] In the design of brazed component 23, X-axis brazing surface 6 and Y-axis brazing surface 7 need to be prepared at the top and left side of brazed component 23, respectively. These two brazing surfaces form a vertical welding surface, thereby enhancing the stability and reliability of brazing. To ensure the accuracy and quality of X-axis brazing surface 6 and Y-axis brazing surface 7, CNC machining technology is used for preparation. CNC machining technology has the characteristics of high precision, high efficiency, and high stability, which can meet the requirements of welding surface accuracy and flatness. This method can ensure the quality of the welding surface, thereby improving the strength and sealing of the entire brazed joint. In practical applications, the preparation process of X-axis brazing surface 6 and Y-axis brazing surface 7 is as follows: First, the brazed component is precisely CNC machined to obtain the required welding surface size and shape. Then, the welding surface undergoes strict quality inspection to ensure that its accuracy and flatness meet the design requirements. Finally, the brazing process is performed on the welding surface to form a strong welded joint. Through this design, not only is the quality and reliability of the brazed component improved, but the risk of leakage and loosening during use is also greatly reduced.

[0055] S4: Pre-assembly of brazed components

[0056] Place brazed part 1 on brazed part 2 3, ensuring that the brazed surface 6 in the X direction and the brazed surface 7 in the Y direction are tightly fitted. The Y-direction locking 4 and the X-direction locking 5 can be squeezed by external tools to further ensure the sealing of the weld between brazed part 1 and brazed part 2 3. Then, install the locking countersunk bolts 2 through the reserved threaded holes to brazed part 1 and brazed part 2 3. In this step, it is necessary to ensure that the number and position distribution of the locking countersunk bolts 2 are reasonable in order to achieve the best connection strength and stability.

[0057] S5: Brazing process

[0058] Brazing is a highly efficient and reliable welding method. It primarily involves heating the brazing components using brazing equipment, causing the aluminum alloy materials of brazed parts 1 and 3 to fuse together under the influence of the brazing components. This connection method features strong adhesion and excellent sealing. To ensure weld quality, friction stir welding is employed during the brazing process. This method offers advantages such as ease of operation, high welding speed, and high weld quality. Simultaneously, the temperature during brazing is controlled between 500℃ and 600℃, as the melting point of aluminum alloy is relatively low within this temperature range, which is beneficial for welding. Furthermore, strict control of heating time and rate is crucial during the welding process. Excessive heating time or rate can lead to defects such as cracks or porosity during welding, affecting the weld quality. In addition, during the welding process, it is necessary to pay close attention to parameters such as temperature, time and speed to ensure the strength and sealing of the weld. Furthermore, the counterweight preload surface 8 is used to provide additional pressure and stability during the welding process. During the brazing process, due to the thermal expansion effect, the welded part may deform or crack. To avoid this, the design of the counterweight preload surface 8 needs to take into account the thermal expansion effect during the brazing process to ensure that it can provide stable and moderate pressure during the welding process.

[0059] S6: Quality Inspection

[0060] The brazed locking structure is subjected to quality inspection using testing equipment, including testing of welding quality, connection strength, and stability, to ensure that the brazed locking structure meets design and usage requirements. Specifically, the quality inspection process requires the use of high-precision testing equipment and methods, including but not limited to X-ray inspection and ultrasonic testing, to ensure that key indicators such as welding quality, connection strength, and stability of the brazed locking structure meet design and usage requirements.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A brazing locking structure for box-shaped parts, comprising brazing component two (3), characterized in that: The brazing component 2 (3) is provided with a welding surface assembly around its periphery. The welding surface assembly is used to improve the firmness and sealing of the brazing. The top of the brazing component 2 (3) is installed with the brazing component 1 (1) by locking countersunk bolts (2). The brazing component 1 (1) is provided with a locking assembly around its periphery. The locking assembly is used to improve the connection strength and stability between the brazing component 1 (1) and the brazing component 2 (3). The welding surface assembly includes an X-direction brazing surface (6). The X-direction brazing surface (6) is provided at the top of the brazing component 2 (3). The materials of the brazing component 1 (1) and the brazing component 2 (3) are both aluminum alloy.

2. The brazing locking structure for the housing parts according to claim 1, characterized in that: The welding surface assembly also includes a Y-direction brazing surface (7), which is located on the left side of the second brazing component (3). The Y-direction brazing surface (7) and the X-direction brazing surface (6) form a vertical welding surface. The vertical welding surface is more stable during welding, resulting in a better welding effect. The locking assembly includes an X-direction lock (5), which is located on the left side of the first brazing component (1). The locking assembly also includes a Y-direction lock (4), which is located at the top of the first brazing component (1).

3. The brazing locking structure for the housing parts according to claim 1, characterized in that: The locking countersunk bolt (2) is made of stainless steel, which has high strength and corrosion resistance.

4. The brazing locking structure for the housing parts according to claim 2, characterized in that: The top of the brazed part (1) is also provided with a counterweight preload surface (8) to provide additional pressure and stability during the brazing process. The number of locking countersunk bolts (2) is set in multiple sets. The Y-direction brazing surface (7) is set to three, and the X-direction brazing surface (6) is set to four. The counterweight preload surface (8) is a rectangular plane, and its size is set according to actual needs to ensure that sufficient pressure and stability can be provided during the brazing process.

5. The brazing locking structure for the housing parts according to claim 1, characterized in that: The locking countersunk bolt (2) has a locking thickness greater than 20mm.

6. The brazing locking method for housing parts according to any one of claims 1-5, characterized in that: Includes the following steps: S1: Material Preparation Prepare brazing part one (1), brazing part two (3), and locking countersunk bolt (2), and reserve multiple threaded holes on brazing part one (1) and brazing part two (3) as locking points for use by the locking countersunk bolt (2). The locking countersunk bolt (2) is made of stainless steel and has a thickness greater than 20mm. The surfaces of brazing part one (1) and brazing part two (3) are pickled to remove oil and oxide layer. S2: Tool Preparation Prepare brazing and testing equipment, and ensure that all equipment is in good working order to guarantee the smooth progress of the brazing process; S3: Preparation of solder surface assembly X-direction brazing surface (6) and Y-direction brazing surface (7) are prepared on the top and left sides of the brazing component 2 (3) respectively to form a vertical welding surface to improve the brazing strength and sealing performance. S4: Pre-assembly of brazed components Place the first brazed part (1) on the second brazed part (3) to ensure that the brazed surface (6) in the X direction and the brazed surface (7) in the Y direction are tightly fitted. The Y-direction locking (4) and the X-direction locking (5) can be squeezed by external tools to further ensure the sealing of the brazed part (1) and the second brazed part (3). The countersunk bolts (2) are installed on the first brazed part (1) and the second brazed part (3) through the reserved threaded holes. In this step, it is necessary to ensure that the number and position distribution of the countersunk bolts (2) are reasonable in order to achieve the best connection strength and stability. S5: Brazing process The brazing equipment is used to heat the welding surface assembly, so that the aluminum alloy of brazing part one (1) and brazing part two (3) can be fused together under the action of the welding surface assembly. During the brazing process, the counterweight pre-pressing surface (8) is used to provide additional pressure and stability to ensure the welding quality. S6: Quality Inspection The brazed locking structure is subjected to quality inspection using testing equipment, including testing of welding quality, connection strength, stability, etc., to ensure that the brazed locking structure meets design and usage requirements.

7. The brazing and locking method for housing parts according to claim 6, characterized in that: The X-direction brazing surface (6) and Y-direction brazing surface (7) in S3 are prepared using CNC machining technology to ensure the accuracy and flatness of the welding surface, thereby improving the quality and reliability of the welding. The brazing method in S5 is friction stir welding, with the temperature controlled between 500℃ and 600℃. The heating time and heating rate are strictly controlled during the welding process to avoid defects such as cracks or pores during the welding process, ensuring the firmness and sealing of the welding.

8. The brazing and locking method for housing parts according to claim 6, characterized in that: The brazing equipment in S2 adopts advanced digital control technology to achieve precise control of the welding process, improve welding quality and stability. At the same time, the brazing equipment is also equipped with an automated wire feeding system and an intelligent temperature control system to achieve automation and intelligence of the welding process, further improving production efficiency and quality.

9. The brazing locking method for housing parts according to claim 6, characterized in that: The design of the counterweight preload surface (8) in S5 needs to take into account the thermal expansion effect during the brazing process, so as to ensure that a stable and moderate pressure can be provided during the welding process to prevent welding deformation or cracks caused by thermal expansion.

10. The brazing and locking method for housing parts according to claim 6, characterized in that: The quality inspection process in S6 requires the use of high-precision testing equipment and methods, including but not limited to X-ray inspection and ultrasonic testing, to ensure that key indicators such as the welding quality, connection strength, and stability of the brazed locking structure meet the design and usage requirements.

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