Preparation process of bent pipe aluminum shell boron carbide nozzle

Abstract

The invention belongs to the technical field of nozzle forming, and discloses a preparation process of a bent pipe aluminum shell boron carbide nozzle. The bent pipe aluminum shell boron carbide nozzle comprises a nozzle inner core and an aluminum outer sleeve, and the aluminum outer sleeve wraps the outer portion of the nozzle inner core. According to the manufacturing technology, according to the design shape of the bent pipe aluminum shell boron carbide nozzle, a nozzle inner core is designed to be composed of a spray head and a plurality of partition pieces of bent pipe sections with different arc lengths, in the actual production process, inclined faces are machined at the ends of straight pipe sections to replace the bent pipe sections, and the spray head and the multiple straight pipe sections are sequentially connected to form the nozzle inner core. The aluminum outer sleeve is designed to be composed of the aluminum head and the bent aluminum pipe, when the nozzle inner core and the aluminum outer sleeve are assembled, the aluminum head penetrates through the straight pipe sections to be arranged on the spray head in a sleeving mode, then the bent aluminum pipe is arranged on the straight pipe sections in a sleeving mode, and finally the aluminum head and the bent aluminum pipe are fixed. According to the preparation process, the machining and assembling difficulty of the bent pipe aluminum shell boron carbide nozzle can be reduced, the rejection rate is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nozzle forming technology, and in particular to a manufacturing process for a bent aluminum shell boron carbide nozzle. Background Technology

[0002] The bent-tube aluminum-shell boron carbide nozzle consists of a nozzle core made of boron carbide and an aluminum outer casing surrounding the core. The high hardness and wear resistance of the boron carbide core make it suitable for high-frequency abrasion applications such as sandblasting and high-pressure cleaning. The aluminum outer casing is lightweight, easy to install, has good heat dissipation, and protects the core. Therefore, aluminum-shell boron carbide nozzles are commonly used in sandblasting, high-pressure waterjet cutting, aerospace, and other fields.

[0003] Currently, for bent aluminum shell boron carbide nozzles, the nozzle core is generally formed by hot pressing and sintering into a single piece of boron carbide ceramic, and then the core is machined according to the requirements of the product drawings. However, due to the high hardness of boron carbide ceramic, it is brittle and prone to chipping, while the required wall thickness of the core is very thin. This process is not only wasteful of raw materials and time-consuming, but also results in a high scrap rate. Furthermore, during the machining of the bent section of the core, tool wear is severe, leading to high processing costs and low efficiency. When machining the aluminum outer shell, the straight section of the nozzle is typically machined using a CNC lathe, followed by milling the connection between the straight and bent sections to ensure a smooth transition. However, the one-piece boron carbide core cannot be directly assembled into the aluminum jacket. If the boron carbide core is inserted into the aluminum jacket in sections and then assembled, the concentricity between the multiple boron carbide core sections cannot be guaranteed due to the gap between the aluminum jacket and the boron carbide core. Poor concentricity will lead to the deviation of the high-pressure fluid jet direction and uneven pressure loss, which will seriously affect the sandblasting efficiency or cutting accuracy.

[0004] Therefore, there is an urgent need to propose a manufacturing process for a bent aluminum shell boron carbide nozzle to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a manufacturing process for a bent aluminum shell boron carbide nozzle, which can reduce the processing and assembly difficulty of the bent aluminum shell boron carbide nozzle, reduce the scrap rate, and improve production efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A manufacturing process for a bent-tube aluminum-shell boron carbide nozzle, the bent-tube aluminum-shell boron carbide nozzle comprising a nozzle inner core and an aluminum outer sleeve, the aluminum outer sleeve wrapping around the nozzle inner core, characterized in that the manufacturing process specifically includes the following steps:

[0008] S1: Based on the design shape of the bent aluminum shell boron carbide nozzle, the nozzle core is designed to consist of a nozzle and multiple bent pipe segments with different arc lengths, and the arc length and central angle of each bent pipe segment are determined. The aluminum outer shell is designed to consist of an aluminum head and a bent aluminum tube, and the arc length and central angle of the bent aluminum tube are determined.

[0009] S2: Obtain the same number of straight pipe segments as the number of the bent pipe segments by cutting the boron carbide pipe, and the length of the multiple straight pipe segments corresponds one-to-one with the arc length of the multiple bent pipe segments;

[0010] A straight aluminum tube with the same arc length as the bent aluminum tube is obtained by cutting the aluminum tube.

[0011] S3: A bevel is machined at the end of the straight pipe section connected to the nozzle that is away from the nozzle, and a bevel is machined at the ends of the remaining straight pipe sections, so that the included angle between the two ends of the straight pipe section is the same as the central angle of the corresponding bend.

[0012] The straight aluminum tube is bent into the same shape as the bent aluminum tube;

[0013] S4: The nozzle and multiple straight pipe sections are sequentially connected end-face to form the nozzle core;

[0014] S5: Pass the aluminum head through the multiple straight pipe sections and sleeve it on the nozzle, sleeve the bent aluminum tube on the multiple straight pipe sections, and fix the aluminum head and the bent aluminum tube.

[0015] Optionally, after step S5, the following step is further included: injecting epoxy resin between the aluminum jacket and the nozzle core.

[0016] Optionally, between step S2 and step S3, the following steps are further included: internally grinding the nozzle using an internal grinding machine, and externally grinding the nozzle and the straight pipe section using an external grinding machine.

[0017] Optionally, in step S2, the aluminum head and the straight aluminum tube are machined using a CNC machine tool, and an internal thread is machined on the aluminum head and an external thread is machined on the straight aluminum tube, wherein the internal thread can engage with the external thread.

[0018] Optionally, in step S4, before connecting the nozzle and the multiple straight pipe sections, the following steps are also included: adding numbers to the multiple straight pipe sections in the order of connection, and drawing line marks on the highest point of the intersection line of the multiple straight pipe sections.

[0019] Optionally, in step S4, the nozzle and the plurality of straight pipe sections are fixedly bonded together by AB glue.

[0020] Optionally, in step S2, the nozzle is manufactured by hot pressing and sintering.

[0021] Optionally, in step S2, the boron carbide tube and the aluminum tube are cut using a CNC machine tool.

[0022] Optionally, in step S3, the ends of the plurality of straight pipe sections are machined with bevels using a surface grinder.

[0023] Optionally, in step S3, the straight aluminum tube is bent into the same shape as the bent aluminum tube using a tube bending machine.

[0024] The beneficial effects of this invention are:

[0025] This invention provides a manufacturing process for a bent-tube aluminum shell boron carbide nozzle. Based on the nozzle's design shape, the nozzle core is designed as a segmented component consisting of a nozzle head and multiple bent tube sections of varying arc lengths. In actual production, a bevel is machined at the end of a straight tube section to replace the bent tube section. Finally, the nozzle head and multiple straight tube sections are sequentially connected to form the nozzle core. Compared to the existing method of integrally molding the nozzle core, segmented processing not only reduces the scrap rate but also reduces processing difficulty and improves production efficiency due to the bevels machined at the ends of the straight tube sections. Furthermore, by designing the aluminum outer casing as consisting of an aluminum head and a bent aluminum tube, the assembly difficulty is reduced when assembling the nozzle core and the aluminum outer casing. Since the nozzle core has already completed its own assembly before being assembled with the aluminum outer casing, the concentricity of the nozzle core is ensured, thereby guaranteeing the spray quality of the bent-tube aluminum shell boron carbide nozzle. Attached Figure Description

[0026] Figure 1 This is a flowchart of the manufacturing process of the bent aluminum shell boron carbide nozzle provided in the embodiment of the present invention;

[0027] Figure 2 This is a structural diagram of the nozzle inner core provided in an embodiment of the present invention;

[0028] Figure 3 This is an exploded view of the nozzle core provided in an embodiment of the present invention;

[0029] Figure 4 This is a side view of the nozzle inner core provided in an embodiment of the present invention;

[0030] Figure 5 yes Figure 4 Sectional view at point AA;

[0031] Figure 6 This is a structural diagram of the aluminum jacket provided in an embodiment of the present invention;

[0032] Figure 7This is a structural diagram of the aluminum head provided in an embodiment of the present invention;

[0033] Figure 8 This is a structural diagram of the bent aluminum tube provided in an embodiment of the present invention;

[0034] Figure 9 This is a side view of the aluminum jacket provided in an embodiment of the present invention;

[0035] Figure 10 yes Figure 9 Sectional view at point BB.

[0036] In the picture:

[0037] 1. Nozzle inner core; 11. Nozzle head; 12. Straight pipe section; 121. Highest point;

[0038] 2. Aluminum jacket; 21. Aluminum head; 211. Internal thread; 22. Bent aluminum tube; 221. External thread. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0043] like Figures 1 to 10 As shown, this embodiment provides a manufacturing process for a bent-tube aluminum-shell boron carbide nozzle, wherein the bent-tube aluminum-shell boron carbide nozzle includes a nozzle inner core 1 and an aluminum outer shell 2, with the aluminum outer shell 2 wrapping around the nozzle inner core 1. The manufacturing process of this bent-tube aluminum-shell boron carbide nozzle specifically includes the following steps:

[0044] S1: Based on the design shape of the bent aluminum shell boron carbide nozzle, the nozzle inner core 1 is designed to be composed of a nozzle 11 and multiple bent pipe segments (not shown in the figure) with different arc lengths, and the arc length and central angle of each bent pipe segment are determined. The aluminum outer shell 2 is designed to be composed of an aluminum head 21 and a bent aluminum tube 22, and the arc length and central angle of the bent aluminum tube 22 are determined.

[0045] S2: Obtain the same number of straight pipe segments 12 as the number of bent pipe segments by cutting the boron carbide pipe, and the length of the multiple straight pipe segments 12 corresponds one-to-one with the arc length of the multiple bent pipe segments;

[0046] A straight aluminum tube (not shown in the figure) with the same arc length as the bent aluminum tube 22 is obtained by cutting the aluminum tube.

[0047] S3: A bevel is machined at the end of the straight pipe section 12 connected to the nozzle 11 that is away from the nozzle 11, and the ends of the remaining straight pipe sections 12 are also machined with bevels, so that the included angle between the two ends of the straight pipe section 12 is the same as the central angle of the corresponding bend.

[0048] The straight aluminum tube is bent into the same shape as the bent aluminum tube 22;

[0049] S4: Connect the nozzle 11 and multiple straight pipe sections 12 to form the nozzle core 1 by sequentially bonding their end faces together;

[0050] S5: Pass the aluminum head 21 through multiple straight pipe sections 12 and mount it on the nozzle 11, mount the bent aluminum pipe 22 on multiple straight pipe sections 12, and fix the aluminum head 21 and the bent aluminum pipe 22.

[0051] This embodiment provides a manufacturing process for a bent-tube aluminum shell boron carbide nozzle. Based on the nozzle's design shape, the nozzle core 1 is designed as a segmented component consisting of a nozzle head 11 and multiple bent tube sections of varying arc lengths. In actual production, a bevel is machined at the end of a straight tube section 12 to replace the bent tube section. Finally, the nozzle head 11 and multiple straight tube sections 12 are sequentially connected to form the nozzle core 1. Compared to the existing method of integrally molding the nozzle core 1, segmented processing not only reduces the scrap rate but also reduces processing difficulty and improves production efficiency due to the beveled surface at the end of the straight tube section 12. Furthermore, by designing the aluminum outer sleeve 2 as a component of an aluminum head 21 and a bent aluminum tube 22, the assembly difficulty of assembling the nozzle core 1 and the aluminum outer sleeve 2 is reduced. Since the nozzle core 1 has already completed its own assembly before being assembled with the aluminum outer sleeve 2, the concentricity of the nozzle core 1 is ensured, thereby guaranteeing the spray quality of the bent-tube aluminum shell boron carbide nozzle.

[0052] Optionally, in step S2, the nozzle 11 is manufactured by hot pressing sintering; specifically, the nozzle 11 is formed into a trumpet shape by hot pressing sintering. Hot pressing sintering can achieve high density and excellent wear resistance and crack resistance mechanical properties in the nozzle 11, while also balancing forming accuracy and production efficiency. It should be noted that the use of hot pressing sintering to manufacture boron carbide workpieces is existing technology, and its specific manufacturing process will not be described in detail here.

[0053] It is understood that in some other embodiments, the nozzle 11 may also be manufactured in other ways according to actual needs, such as cold pressing and sintering, and no limitation is made here.

[0054] Optionally, in step S2, the boron carbide tube and the aluminum tube are cut using a CNC machine tool. The CNC machine tool offers high cutting precision and good cut surface consistency, thereby ensuring reliable connections between the subsequent nozzle 11 and multiple straight pipe sections 12, as well as reliable connections between the aluminum head 21 and the bent aluminum tube 22. It should be noted that the CNC machine tool is existing technology, and its specific structure and working principle will not be described in detail here.

[0055] It is understood that in some other embodiments, other methods may be used to cut boron carbide tubes and aluminum tubes according to actual needs, such as waterjet cutting machines, and no limitation is made here.

[0056] Optionally, in step S2, the aluminum head 21 and the straight aluminum tube are machined using a CNC machine tool. Specifically, a trumpet-shaped aluminum head 21 is machined using a CNC machine tool. And as... Figure 7 and Figure 8As shown, an internal thread 211 is machined on the aluminum head 21, and an external thread 221 is machined on the straight aluminum tube. The internal thread 211 on the aluminum head 21 can mesh with the external thread 221 on the straight aluminum tube. Therefore, in step S5, when fixing the aluminum head 21 and the bent aluminum tube 22, it is only necessary to tighten the aluminum head 21. Using a CNC machine tool to machine the shape of the aluminum head 21 and the straight aluminum tube can ensure high precision and high consistency of the surface of the aluminum head 21 and the straight aluminum tube. At the same time, it has a high degree of automation and stable processing efficiency. The threaded connection structure is easy to process, and the connection is firm and has good sealing performance.

[0057] It is understood that in some other embodiments, the aluminum head 21 and the straight aluminum tube can also be processed in other ways according to actual needs, such as a stamping machine, and this is not limited here. It is understood that in some other embodiments, internal threads 211 can be machined on the aluminum head 21 and external threads 221 can be machined on the straight aluminum tube in other ways according to actual needs, such as a tapping machine, and this is not limited here.

[0058] To ensure that the nozzle 11 and the straight pipe section 12 meet the required dimensional accuracy and surface roughness requirements, the following steps are included between steps S2 and S3: internal grinding of the nozzle 11 is performed using an internal grinding machine, and external grinding of both the nozzle 11 and the straight pipe section 12 is performed using an external grinding machine. By performing internal and external grinding on the nozzle 11 respectively, the dimensional accuracy and surface quality of the nozzle 11's inner bore (jet channel) can be improved, thereby ensuring the nozzle 11's jetting performance and assembly reliability. Similarly, by performing external grinding on the straight pipe section 12, the surface quality of the straight pipe section 12 can be improved, thereby ensuring the straight pipe section 12's assembly reliability.

[0059] It should be noted that both internal and external cylindrical grinding machines are existing technologies, and their specific structures and working principles will not be described in detail here.

[0060] Optionally, in step S3, the ends of the multiple straight pipe sections 12 are machined with bevels using a surface grinder. This machining method produces bevels with higher precision and better surface quality, thus facilitating a reliable connection between the nozzle 11 and the multiple straight pipe sections 12. It should be noted that surface grinders are existing technology, and their specific structure and working principle will not be described in detail here.

[0061] It is understood that in some other embodiments, the ends of multiple straight pipe sections 12 can be machined into bevels in other ways, such as water jet cutting, which is not limited here.

[0062] Optionally, in step S3, the straight aluminum tube is bent into the same shape as the bent aluminum tube 22 using a tube bending machine. Using a tube bending machine to bend the straight aluminum tube provides high dimensional accuracy and consistency, and also protects the mechanical properties and surface quality of the aluminum tube. It should be noted that the tube bending machine is existing technology, and its specific structure and working principle will not be described in detail here.

[0063] It is understood that in some other embodiments, other methods can be used to bend the straight aluminum tube into the same shape as the bent aluminum tube 22, such as a CNC bending machine, which is not limited here.

[0064] To ensure accurate connection between the nozzle 11 and the multiple straight pipe sections 12, and to ensure that the assembled nozzle core 1 matches the shape in the design drawings, such as... Figure 3 As shown, in step S4, before connecting the nozzle 11 and the multiple straight pipe sections 12, the following steps are also included: adding numbers to the multiple straight pipe sections 12 in the order of connection (not shown in the figure), and drawing line marks on the highest point 121 of the intersection line of the multiple straight pipe sections 12 (not shown in the figure).

[0065] Specifically, since each of the multiple straight pipe sections 12 corresponds one-to-one with a multiple bent pipe section divided according to the design drawings, a number is added to the corresponding straight pipe section 12 according to the connection sequence of the multiple bent pipe sections on the design drawings, such as one, two, three, etc., thus avoiding connection errors when connecting multiple straight pipe sections 12. Because the ends of the straight pipe sections 12 are machined with bevels, the intersection line is the outline of the bevel, and the highest point 121 of the intersection line refers to the point on the intersection line farthest from the vertical plane of the straight pipe section 12 axis. By marking the highest point 121 of the intersection line of multiple straight pipe sections 12, alignment can be performed according to the markings when connecting multiple straight pipe sections 12, thereby ensuring the docking accuracy between multiple straight pipe sections 12 and further ensuring the concentricity of the nozzle inner core 1. Furthermore, adding numbers and markings to the multiple straight pipe sections 12 facilitates assembly by operators and improves production efficiency.

[0066] Optionally, in step S4, the nozzle 11 and the multiple straight pipe sections 12 are fixedly bonded together using AB adhesive. AB adhesive has high bonding strength and good sealing performance, which can ensure a sealed connection between the nozzle 11 and the multiple straight pipe sections 12, prevent leakage of the nozzle core 1, and the bonding operation is simple, which can improve production efficiency.

[0067] It is understood that in some other embodiments, other methods can be used to achieve a sealed connection between the nozzle 11 and the multiple straight pipe sections 12, such as brazing, which is not limited here.

[0068] Due to differences in material properties and processing errors between the nozzle inner core 1 and the aluminum outer sleeve 2, their coefficients of thermal expansion are mismatched, resulting in assembly gaps after assembly. This makes the bent aluminum shell boron carbide nozzle prone to leakage and vibration impact during operation. Therefore, in existing technologies, after the nozzle inner core 1 and aluminum outer sleeve 2 are assembled, AB glue is usually injected between them to securely fix them and seal the gap. However, due to the poor flowability of AB glue, it solidifies before filling the gap between the nozzle inner core 1 and aluminum outer sleeve 2 during actual production. This results in loose adhesion between the nozzle inner core 1 and aluminum outer sleeve 2, with stress concentrated at a few bonding points. Long-term use will increase the risk of brittle fracture of the nozzle inner core 1 and affect the structural stability of the bent aluminum shell boron carbide nozzle. Filling the gap between the nozzle inner core 1 and aluminum outer sleeve 2 with AB glue is extremely difficult.

[0069] To address this issue, this embodiment includes the following step after step S5: injecting epoxy resin between the aluminum outer casing 2 and the nozzle inner core 1. The epoxy resin has good flowability, thus filling the gap between the aluminum outer casing 2 and the nozzle inner core 1. This not only ensures a firm fixation and gap sealing between the nozzle inner core 1 and the aluminum outer casing 2, but also guarantees the structural stability of the bent aluminum shell boron carbide nozzle. Furthermore, because the epoxy resin possesses a certain degree of toughness after solidification, it can buffer vibration and impact, coordinate the thermal expansion differences between the aluminum outer casing 2 and the nozzle inner core 1, and compensate for processing errors. This further ensures the spraying accuracy and structural stability of the bent aluminum shell boron carbide nozzle, extending the service life of the nozzle inner core 1.

[0070] The manufacturing process of the bent aluminum shell boron carbide nozzle provided in this embodiment has the following advantages:

[0071] Firstly, based on the design shape of the bent aluminum shell boron carbide nozzle, the nozzle core 1 is designed to consist of a nozzle 11 and multiple bent pipe sections of different arc lengths. In actual production, a bevel is machined at the end of the straight pipe section 12 to replace the bent pipe section. Finally, the nozzle 11 and multiple straight pipe sections 12 are connected in sequence to form the nozzle core 1. Compared with the existing technology of integrally forming the nozzle core 1, segmented processing can not only reduce the scrap rate, but also reduce the processing difficulty and improve production efficiency because the bevel is machined at the end of the straight pipe section 12.

[0072] Secondly, by designing the aluminum jacket 2 as consisting of an aluminum head 21 and a bent aluminum tube 22, the assembly difficulty can be reduced when assembling the nozzle inner core 1 and the aluminum jacket 2. Furthermore, since the nozzle inner core 1 has already completed its own assembly before being assembled with the aluminum jacket 2, the concentricity of the nozzle inner core 1 can be ensured, thereby guaranteeing the spray quality of the bent aluminum shell boron carbide nozzle.

[0073] Third, by adding numbers and markings to multiple straight pipe sections 12, the accuracy of the docking between multiple straight pipe sections 12 is ensured, the concentricity of the nozzle inner core 1 is further ensured, and the assembly is facilitated by the operators, thereby improving production efficiency.

[0074] Fourth, by injecting epoxy resin between the aluminum outer jacket 2 and the nozzle inner core 1, the epoxy resin can fill the gap between the aluminum outer jacket 2 and the nozzle inner core 1, which can not only achieve a firm fixation between the nozzle inner core 1 and the aluminum outer jacket 2 and seal the gap, but also ensure the structural stability of the bent tube aluminum shell boron carbide nozzle.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A manufacturing process for a bent-tube aluminum shell boron carbide nozzle, the bent-tube aluminum shell boron carbide nozzle comprising a nozzle inner core (1) and an aluminum outer shell (2), the aluminum outer shell (2) wrapping around the nozzle inner core (1), characterized in that, The preparation process specifically includes the following steps: S1: Based on the design shape of the bent aluminum shell boron carbide nozzle, the nozzle core (1) is designed to be composed of a nozzle (11) and multiple bent pipe segments with different arc lengths, and the arc length and central angle of each bent pipe segment are determined. The aluminum outer shell (2) is designed to be composed of an aluminum head (21) and a bent aluminum tube (22), and the arc length and central angle of the bent aluminum tube (22) are determined. S2: Obtain straight pipe segments (12) of the same number as the bent pipe segments by cutting boron carbide pipes, and the lengths of the multiple straight pipe segments (12) correspond one-to-one with the arc lengths of the multiple bent pipe segments; A straight aluminum tube with the same arc length as the bent aluminum tube (22) is obtained by cutting the aluminum tube; S3: A bevel is machined at one end of the straight pipe section (12) connected to the nozzle (11) away from the nozzle (11), and bevels are machined at the ends of the remaining straight pipe sections (12) so that the included angle between the two ends of the straight pipe section (12) is the same as the central angle of the corresponding bent pipe section. The straight aluminum tube is bent into the same shape as the bent aluminum tube (22); S4: The nozzle (11) and multiple straight pipe sections (12) are sequentially connected end-face to form the nozzle core (1). S5: Pass the aluminum head (21) through multiple straight pipe sections (12) and put it on the nozzle (11), put the bent aluminum pipe (22) on multiple straight pipe sections (12), and fix the aluminum head (21) and the bent aluminum pipe (22).

2. The manufacturing process of the bent aluminum shell boron carbide nozzle according to claim 1, characterized in that, The following steps are included after step S5: Epoxy resin is injected between the aluminum jacket (2) and the nozzle core (1).

3. The manufacturing process of the bent aluminum shell boron carbide nozzle according to claim 1, characterized in that, The following steps are also included between step S2 and step S3: The nozzle (11) is internally ground using an internal grinding machine, and the nozzle (11) and the straight pipe section (12) are externally ground using an external grinding machine.

4. The manufacturing process of the bent aluminum shell boron carbide nozzle according to claim 1, characterized in that, In step S2, the aluminum head (21) and the straight aluminum tube are machined by a CNC machine tool, and an internal thread (211) is machined on the aluminum head (21) and an external thread (221) is machined on the straight aluminum tube. The internal thread (211) can mesh with the external thread (221).

5. The manufacturing process of the bent aluminum shell boron carbide nozzle according to claim 1, characterized in that, In step S4, before connecting the nozzle (11) and the plurality of straight pipe sections (12), the following steps are also included: Number the multiple straight pipe segments (12) in the order of connection, and mark the highest point (121) of the intersection line of the multiple straight pipe segments (12).

6. The manufacturing process of the bent aluminum shell boron carbide nozzle according to claim 1, characterized in that, In step S4, the nozzle (11) and the multiple straight pipe sections (12) are fixedly bonded together by AB glue.

7. The manufacturing process of the bent aluminum shell boron carbide nozzle according to any one of claims 1-6, characterized in that, In step S2, the nozzle (11) is manufactured by hot pressing and sintering.

8. The manufacturing process of the bent aluminum shell boron carbide nozzle according to any one of claims 1-6, characterized in that, In step S2, the boron carbide tube and the aluminum tube are cut using a CNC machine tool.

9. The manufacturing process of the bent aluminum shell boron carbide nozzle according to any one of claims 1-6, characterized in that, In step S3, the ends of the multiple straight pipe sections (12) are machined with bevels using a surface grinder.

10. The manufacturing process of the bent aluminum shell boron carbide nozzle according to any one of claims 1-6, characterized in that, In step S3, the straight aluminum tube is bent into the same shape as the bent aluminum tube (22) by a tube bending machine.

Images