Air spring housing manufacturing method, air spring housing and automobile

Abstract

The present application relates to a method for manufacturing an air spring housing, an air spring housing and an automobile, the method comprising: stamping a housing raw material plate along a first set direction to form an outer housing including an outer cavity; stamping the outer housing along a second set direction, and the second set direction is opposite to the first set direction, to form an inner housing located inside the outer housing and including an inner cavity. The present application adopts integral stamping to reduce welding or bonding processes and reduce processing and manufacturing costs. At the same time, during stamping, the size of the processing mold used is fixed, and parameters such as the stamping depth during stamping are pre-set, and the error of the stamping process is small. Therefore, the volume and other parameters of the manufactured air spring housing are small, and the assembled air spring product has high consistency, which reduces the damage rate of the air spring and avoids the reduction in vehicle driving smoothness and stability due to volume differences.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle air springs, and in particular to an air spring housing manufacturing method, an air spring housing and a vehicle. Background Art

[0002] At present, the air spring is an adjustable vehicle shock absorbing device located at the connection between the vehicle body and the frame. It mainly plays the role of reliable connection, vibration reduction and keeping the vehicle body at a set height, providing stable driving and steering stability for passengers. It is widely used in commercial vehicles and buses.

[0003] A common method for manufacturing an air spring housing is to separately manufacture and integrate each partial housing and then connect them by welding or bonding to form an air spring housing assembly. However, when performing welding or gluing processes on each separately manufactured partial housing, it is necessary to check whether the connection part has leaks, which increases manufacturing costs.

[0004] In the related art, a method of manufacturing two air spring half shells by deep drawing is proposed, and the upper and lower shell flanges are connected by a clamp made of plastically deformable material (such as a steel ring, a flange, etc.). Since the welding or bonding process is omitted, the manufacturing cost is reduced.

[0005] However, the connection method in the related art can omit the welding or bonding process of each shell, but at the same time it also increases the manufacturing cost of the connection structure accordingly; at the same time, due to the installation errors and processing errors of the shell connecting parts, it is easy to cause the internal volume of the manufactured air spring to be inconsistent, resulting in volume differences, causing the vehicle body height to deviate from the set value during driving, affecting the vehicle's driving smoothness and stability. Summary of the invention

[0006] The embodiments of the present application provide an air spring housing manufacturing method, an air spring housing and a car, so as to solve the problems in the related art that the air spring housing manufacturing cost is high, and the internal volume of the manufactured air spring is inconsistent due to the installation errors of the connecting parts and the processing errors, and the vehicle body height deviates from the set value during the driving process of the vehicle, thereby affecting the driving smoothness and stability of the vehicle.

[0007] On the one hand, the present application provides a method for manufacturing an air spring housing, the technical solution adopted is:

[0008] A method for manufacturing an air spring housing, comprising:

[0009] Punching the shell raw material plate along a first set direction to form an outer shell including an outer cavity;

[0010] The outer shell is punched along a second set direction, and the second set direction is opposite to the first set direction, to form an inner shell located inside the outer shell and including an inner cavity.

[0011] By adopting the above technical scheme, a punch can be used to punch on the raw material plate along a first set direction to form an outer shell including an outer cavity. The outer cavity with a set depth and diameter can be punched out according to the design. At the same time, according to the design requirements, the outer shell is punched along a second set direction opposite to the first set direction to form an inner shell including an inner cavity. The depth, diameter and other parameters of the inner cavity are also designed according to the requirements to meet the assembly requirements of the designed air spring. The entire shell is formed by stamping, which can reduce welding or bonding processes and reduce processing and manufacturing costs. At the same time, during stamping, the size of the processing mold used is fixed, and parameters such as the stamping depth during stamping are pre-set, and the error of the stamping process is small. Therefore, the volume and other parameters of the manufactured air spring shell are small, and the assembled air spring product has high consistency, which reduces the damage rate of the air spring and avoids the decrease in vehicle driving smoothness and stability due to volume differences.

[0012] In some embodiments, when the outer cavity has a circular cross-section with multiple different diameters along the first set direction, when punching the shell raw material plate, the outer cavity is punched in order from small to large diameters.

[0013] By adopting the above technical solution, when stamping the shell raw material plate, if a plurality of punches with different diameters are used in the order of the outer cavity diameter from large to small, and the outer cavity is stamped in sequence, after stamping with a punch with a larger diameter, it is necessary to use a punch with a smaller diameter to continue stamping along the first set direction at the bottom of the outer cavity formed by the previous stamping. At this time, due to the ductility of the metal, the semi-finished shell formed by the previous stamping will be deformed, resulting in the deformation of the outer cavity formed by the previous stamping, and the connection between the two sections of the outer cavity formed by the two stampings will be deformed, and the size of the connection cannot be maintained. The outer shell obtained by the final stamping does not meet the design requirements, which affects the effect of the previous stamping process. Even if it can be adjusted and compensated by other means in the subsequent processing, it will increase the unnecessary processing cost. Therefore, according to the order of the outer cavity diameter from small to large, a variety of punches with different diameters are used to punch out the outer cavity in sequence, which can ensure that the latter stamping will not affect the semi-finished shell obtained by the previous stamping, that is, the latter stamping will not affect the previous stamping, so as to ensure that the outer shell obtained by the final stamping meets the design requirements, reduce errors and avoid cost increase.

[0014] In some embodiments, when the layer cavity presents circular cross-sections of various diameters along the second set direction, when punching the outer shell, the inner layer cavity is punched out in order of the diameter of the inner layer cavity from small to large.

[0015] By adopting the above technical solution, when punching the outer shell, if a plurality of punches with different diameters are used in the order of the inner cavity diameter from large to small, and the inner cavity is punched out in sequence, after the punch with a larger diameter is used for punching, it is necessary to use a punch with a smaller diameter to continue punching along the first set direction at the bottom of the inner cavity formed by the previous punching. At this time, due to the ductility of the metal, the semi-finished shell formed by the previous punching will be deformed, resulting in the deformation of the inner cavity formed by the previous punching, and the connection between the two sections of the inner cavity formed by the two punchings will be deformed, and the size of the connection cannot be maintained. The inner shell obtained by the final stamping does not meet the design requirements, which affects the effect of the previous stamping process. Even if it can be adjusted and compensated by other means in the subsequent processing, it will increase the unnecessary processing cost. Therefore, according to the order of the inner cavity diameter from small to large, a variety of punches with different diameters are used to punch and form the inner cavity in sequence, which can ensure that the latter stamping will not affect the semi-finished shell obtained by the previous stamping, that is, the latter stamping will not affect the previous stamping, so as to ensure that the inner shell obtained by the final stamping meets the design requirements, reduce errors and avoid cost increase.

[0016] In some embodiments, when the inner shell is stamped and the outer cavity and inner cavity formed by stamping include circular cross-sections of various diameters, a transition inclined portion is processed at the junction of the circular cross-sections of different diameters of the outer cavity and the inner cavity.

[0017] In some embodiments, before processing the transition inclined portion at the junction of the circular cross-sections of the outer cavity and the inner cavity with different diameters, the following steps are also included:

[0018] detecting the actual volume of the outer cavity;

[0019] When the actual volume of the outer cavity does not meet the design volume requirement, determining the difference between the actual volume of the outer cavity and the design volume;

[0020] According to the difference between the actual volume and the designed volume, the design parameters of the transition inclined portion at the junction of the circular cross sections of different diameters of the outer cavity and the inner cavity are determined so that the actual volume of the outer cavity meets the designed volume requirements;

[0021] According to the design parameters of the transition inclined portion, the transition inclined portion at the junction of the circular cross-sections of the outer cavity and the inner cavity with different diameters is processed.

[0022] By adopting the above technical solution, compared with the traditional method of conducting leakage inspection after welding, the air tightness inspection is carried out after the stamping process stage. If volume difference occurs, it can be compensated in the subsequent transition tilting part processing stage, avoiding the loss of raw materials, improving the utilization rate of raw materials, and further reducing the processing and manufacturing costs.

[0023] In some embodiments, when detecting the actual volume of the outer cavity, liquid of the same volume as the set volume of the outer cavity is injected into the outer cavity, and whether the actual volume of the outer cavity meets the set volume is determined based on whether the liquid overflows and the liquid level.

[0024] In some embodiments, the outer cavity and the inner cavity formed by stamping are coaxial.

[0025] In some embodiments, after the inner shell is stamped, the edges of the outer shell and the inner shell are rounded.

[0026] In a second aspect, the present application provides an air spring housing, which is manufactured using the air spring housing manufacturing method as described above.

[0027] In a third aspect, the present application provides a car, comprising an air spring manufactured using the air spring housing as described above.

[0028] The beneficial effects of the technical solution provided by this application include:

[0029] The embodiment of the present application provides a method for manufacturing an air spring housing, which can punch a housing raw material plate, and can use a punch to punch on the raw material plate along a first set direction to form an outer shell including an outer cavity. The outer cavity with a set depth and diameter can be punched out according to the design, and at the same time, according to the design requirements, the outer shell is punched along a second set direction opposite to the first set direction to form an inner shell including an inner cavity. The depth, diameter and other parameters of the inner cavity are also designed according to the requirements to meet the assembly requirements of the designed air spring. The entire housing is stamped, which can reduce welding or bonding processes and reduce processing and manufacturing costs. At the same time, during stamping, the size of the processing mold used is fixed, and parameters such as the stamping depth during stamping are pre-set, and the error of the stamping process is small. Therefore, the volume and other parameters of the manufactured air spring housing are small, and the assembled air spring product has high consistency, which reduces the damage rate of the air spring and avoids the reduction in vehicle driving smoothness and stability due to volume differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0031] Figure 1 A schematic diagram of the structure of an outer shell obtained after the first stage of processing in the air spring shell manufacturing method provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the structure of the outer shell and the inner shell obtained after the second stage of processing in the air spring shell manufacturing method provided in the embodiment of the present application

[0033] Figure 3 A schematic structural diagram of a semi-finished product obtained after the third stage of processing in the air spring housing manufacturing method provided in an embodiment of the present application;

[0034] Figure 4 This is a schematic structural diagram of a finished air spring housing obtained after punching in the air spring housing manufacturing method provided in an embodiment of the present application.

[0035] In the figure: 1, outer shell; 11, outer cavity; 2, inner shell; 21, inner cavity; 3, transition inclined portion; 4, rounded corner; 5, structural inclined portion; 6, through hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The embodiments of the present application provide an air spring housing manufacturing method, an air spring housing and a car, which can solve the problems of high manufacturing costs of current air spring housings, easy inconsistency of the internal volume of the manufactured air springs due to errors in the installation of connectors and errors in the processing technology, and deviation of the vehicle body height from the set value during driving, thereby affecting the smoothness and stability of the vehicle's driving.

[0038] On one hand, the present application provides a method for manufacturing an air spring housing, comprising:

[0039] The shell raw material plate is punched along a first set direction to form an outer shell 1 including an outer cavity 11 .

[0040] The outer shell 1 is punched along a second set direction, and the second set direction is opposite to the first set direction, to form an inner shell 2 located inside the outer shell 1 and including an inner cavity 21 .

[0041] By adopting the above technical scheme, by stamping the shell raw material plate, a punch can be used to punch on the raw material plate along a first set direction to form an outer shell 1 including an outer cavity 11, and the outer cavity 11 with a set depth and diameter can be punched out according to the design. At the same time, according to the design requirements, the outer shell 1 is punched along a second set direction opposite to the first set direction to form an inner shell 2 including an inner cavity 21. The depth, diameter and other parameters of the inner cavity 21 are also designed according to the requirements to meet the assembly requirements of the designed air spring. The entire shell is stamped, which can reduce welding or bonding processes and reduce processing and manufacturing costs. At the same time, during stamping, the size of the processing mold used is fixed, and parameters such as the stamping depth during stamping are pre-set, and the error of the stamping process is small. Therefore, the volume and other parameters of the manufactured air spring shell are small, and the assembled air spring product has high consistency, which reduces the damage rate of the air spring and avoids the decrease in vehicle driving smoothness and stability due to volume differences.

[0042] Reference Figure 1 The outer shell 1 is stamped and formed in the first stage, wherein the shell raw material plate is a flat metal plate. When the outer shell 1 is stamped and formed, the center of the shell raw material plate is stamped. When the mold is designed, the center of the shell raw material plate is positioned above the forming hole formed in the mold along the Z direction (vertical direction). The center of the shell raw material plate is stamped by a punch to form an outer shell 1 including an outer cavity 11 with a set cross-sectional shape and a set depth. After the outer shell 1 is stamped and formed, a shell structure with one end open and the other end closed along the first set direction is formed, which is the outer shell 1.

[0043] The depth and cross-sectional shape of the outer cavity 11 are designed according to the requirements of the designed air spring.

[0044] Reference Figure 1 When the outer cavity 11 presents circular cross-sections of various diameters along the first set direction, when the shell raw material plate is punched, the outer cavity 11 is punched in order from small to large diameters.

[0045] Specifically, when punching the shell raw material plate, a plurality of punches with different diameters can be used to punch the same position (center position) of the shell raw material plate, so that the outer cavity 11 has a plurality of circular cross-sections with different diameters along the first set direction, and the cross-sectional diameter of the outer cavity 11 gradually decreases along the first set direction; when punching the shell raw material plate, first use the punch with the smallest diameter to punch to the maximum depth, and the outer cavity 11 formed has a circular cross-section with one diameter, and then use punches with other diameters to punch in the order of gradually increasing diameters. The outer cavity 11 formed by the second punching has two circular cross-sections with different diameters, and the punching is performed in sequence until the outer cavity 11 has a set number and depth of circular cross-sectional segments with different diameters, and the multiple circular cross-sectional segments with different diameters are coaxial and distributed in a stepped manner; refer to Figure 1 In this embodiment, the outer cavity 11 has three circular cross-sections with different diameters.

[0046] When punching the shell raw material plate, if a plurality of punches with different diameters are used in the order of the diameter of the outer cavity 11 from large to small, and the outer cavity 11 is punched out in sequence, after punching with a larger diameter punch, it is necessary to use a smaller diameter punch to continue punching along the first set direction at the bottom of the outer cavity 11 formed by the previous punching. At this time, due to the ductility of the metal, the semi-finished shell formed by the previous punching will be deformed, resulting in deformation of the outer cavity 11 formed by the previous punching, and deformation of the connection between the two sections of the outer cavity 11 formed by the two punchings. The size of the connection cannot be guaranteed, which affects the effect of the previous stamping process, resulting in the final outer shell 1 not meeting the design requirements. Even if it can be adjusted and compensated by other means in the subsequent processing, it will increase unnecessary processing costs.

[0047] In the present application, when punching the shell raw material plate, a variety of punches with different diameters are used in the order of the diameter of the outer cavity 11 from small to large, and the outer cavity 11 is punched out in sequence. This can ensure that the subsequent stamping step will not affect the shell semi-finished product obtained in the previous stamping step, that is, the subsequent stamping step will not affect the previous stamping step, ensuring that the outer shell 1 obtained by the final stamping meets the design requirements, reduces errors, and avoids cost increases.

[0048] Reference Figure 2, the inner shell 2 is stamped and formed as the second stage, wherein, when the inner shell 2 is stamped on the outer shell 1 along the second set direction, the closed end of the outer shell 1, that is, the bottom of the outer shell 1, is stamped in the direction opposite to the stamping direction of the shell raw material plate, that is, the inner shell 2 located inside the outer shell 1 is stamped into the outer shell 1; and according to the design requirements, the inner layer cavity 21 of the formed inner shell 2 is coaxial with the outer layer cavity 11; in this embodiment, the bottom of the outer shell 1 is shown upward. After the inner shell 2 is stamped and formed, a shell structure with one end open and the other end closed along the second set direction is formed, namely, the inner shell 2, and the inner shell 2 and the outer shell 1 form a semi-finished air spring shell with a double-layer structure.

[0049] The depth and cross-sectional shape of the inner cavity 21 are designed according to the requirements of the designed air spring.

[0050] Reference Figure 2 When the inner cavity 21 presents circular cross-sections of various diameters along the second set direction, when the shell raw material plate is punched, the inner cavity 21 is punched in order from small to large diameters.

[0051] Specifically, when punching the outer shell 1, a plurality of punches of different diameters may be used to punch the same position (center position) of the bottom of the outer shell 1 into the outer shell 1, so that the inner cavity 21 has a plurality of circular cross-sections of different diameters along the second set direction, and the cross-sectional diameter of the inner cavity 21 gradually decreases along the second set direction; when punching the outer shell 1, first use the punch with the smallest diameter to punch to the maximum depth, and the formed inner cavity 21 has a circular cross-section of one diameter, and then use punches of other diameters to punch in the order of gradually increasing diameters, and the inner cavity 21 formed by the second punching has two circular cross-sections of different diameters, and punching is performed in sequence until the formed inner cavity 21 has a set number and depth of circular cross-sectional segments of different diameters; refer to Figure 2 In this embodiment, the inner cavity 21 has two circular cross-sections with different diameters.

[0052] Through the above arrangement, when the bottom of the inner shell 2 is stamped, a plurality of punches with different diameters are used to stamp out the inner cavities 21 in sequence according to the order of the diameter of the inner cavities 21 from small to large, thereby ensuring that the latter stamping step will not affect the semi-finished shell product obtained in the previous stamping step, that is, the latter stamping step will not affect the previous stamping step, thereby ensuring that the inner shell 2 finally obtained by stamping meets the design requirements, reduces errors, and avoids cost increases.

[0053] Reference Figure 3Furthermore, after the inner shell 2 is stamped, the edges of the outer shell 1 and the inner shell 2 are rounded 4. Specifically, the rounded corners 4 are located at the bottom edge of the outer shell 1, the opening edge of the inner shell 2, and the bottom edge of the inner shell 2.

[0054] Reference Figure 3 After the inner shell 2 is stamped, and the outer cavity 11 and the inner cavity 21 formed by stamping include circular cross-sections of various diameters, after the rounded corners 4 are processed, the transition inclined portion 3 is processed at the junction of the circular cross-sections of various diameters of the outer cavity 11 and the inner cavity 21.

[0055] Reference Figure 3 , processing the transition inclined portion 3 is the third stage, specifically, the transition inclined portion 3 of the outer cavity 11 is formed by the gradual reduction of the diameter of the outer shell 1 along the stamping direction, and the transition inclined portion 3 of the inner cavity 21 is formed by the gradual reduction of the diameter of the inner shell 2 along the stamping direction. Processing the transition inclined portion 3 makes two adjacent circular cross-sectional segments of different diameters transition smoothly; in this embodiment, on the outer shell 1, the side wall of the middle circular cross-sectional segment among the three circular cross-sectional segments of the outer cavity 11 is processed into a truncated cone shape, thereby forming a transition inclined portion 3 between the two circular cross-sectional segments with the largest diameter and the smallest diameter of the outer cavity 11 on the inner wall of the outer shell 1, and on the inner shell 2, the step structure between the two circular cross-sectional segments of the inner cavity 21 is processed into a truncated cone shape, thereby forming a transition inclined portion 3 between the two circular cross-sectional segments of the inner cavity 21 on the inner wall of the inner shell 2.

[0056] Reference Figure 3 In this embodiment, the outer shell 1 is processed into a truncated cone shape at the open end of the outer cavity 11, and the diameter of the truncated cone gradually increases along the stamping direction of the outer shell 1 to form a structural inclined portion 5.

[0057] Furthermore, before processing the transition inclined portion 3, a detection stage is also included, which specifically includes the following steps:

[0058] The actual volume of the outer cavity 11 is detected.

[0059] When the actual volume of the outer cavity 11 does not meet the design volume requirement, the difference between the actual volume of the outer cavity 11 and the design volume is determined.

[0060] According to the difference between the actual volume and the designed volume, the design parameters of the transition inclined portion 3 at the junction of the circular cross-sections of different diameters of the outer cavity 11 and the inner cavity 21 are determined so that the actual volume of the outer cavity 11 meets the designed volume requirements.

[0061] According to the design parameters of the transition inclined portion 3 , the transition inclined portion 3 at the junction of the circular cross sections of the outer cavity 11 and the inner cavity 21 with different diameters is processed.

[0062] Specifically, when detecting the actual volume of the outer cavity 11, a liquid having the same volume as the set volume of the outer cavity 11 is injected into the outer cavity 11, and whether the actual volume of the outer cavity 11 meets the set volume is determined based on whether the liquid overflows and the height of the liquid level. By injecting the same volume of liquid as the set volume of the outer cavity 11 into the outer cavity 11, it is possible to determine whether the actual volume of the outer cavity 11 meets the design volume requirement, and at the same time, it is possible to determine whether there are cracks in the outer shell 1 and the inner shell 2 based on whether the liquid leaks, so as to perform subsequent repair processing to ensure product quality.

[0063] When the actual volume of the outer cavity 11 does not meet the design volume requirement, the difference between the actual volume of the outer cavity 11 and the design volume is determined. Specifically, if liquid overflows from the outer cavity 11, the difference between the actual volume of the outer cavity 11 and the design volume is determined according to the volume of the overflowed liquid. If the liquid level in the outer cavity 11 is lower than the open end face of the outer cavity 11, liquid continues to be injected into the outer cavity 11 until the liquid level is flush with the open end face of the outer cavity 11, and the difference between the actual volume of the outer cavity 11 and the design volume is determined according to the subsequent injected liquid volume; then, according to the difference between the actual volume of the outer cavity 11 and the design volume, the design parameters of the transition inclined portion 3 at the junction of the circular cross-sections of different diameters of the outer cavity 11 and the inner cavity 21 are determined, and the transition inclined portion 3 is processed according to the design parameters, so that the actual volume of the outer cavity 11 meets the design volume requirement.

[0064] Reference Figure 4 After the transition inclined portion 3 is processed, the bottom center of the inner shell 2 is punched to form a through hole 6 structure of a set shape and size, and the finished air spring shell is obtained.

[0065] This embodiment has the following advantages:

[0066] 1. The one-piece air spring housing processing and manufacturing method can reduce welding or bonding processes and reduce processing and manufacturing costs.

[0067] 2. Since the processing mold uses the same size and the processing depth is pre-set, the volume of the shell after processing is always the same, which reduces the damage rate of the air spring. The assembled air spring products have high consistency and avoid the reduction of vehicle driving smoothness and stability due to volume differences.

[0068] 3. Compared with the traditional method of conducting leakage inspection after welding, the present application can conduct airtightness inspection after the stamping process. If volume difference occurs, it can be compensated in the subsequent transition inclined portion 3 processing stage, avoiding the loss of raw materials, improving the utilization rate of raw materials, and further reducing the processing and manufacturing costs.

[0069] The present application also provides an air spring housing, which is manufactured using the air spring housing manufacturing method as described above.

[0070] The present application also provides a car, comprising an air spring manufactured using the air spring housing as described above.

[0071] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0072] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0073] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for manufacturing an air spring housing, It is characterized in that include: Punching the shell raw material plate along a first set direction to form an outer shell (1) including an outer cavity (11); Punching the outer shell (1) along a second set direction, wherein the second set direction is opposite to the first set direction, to form an inner shell (2) located inside the outer shell (1) and including an inner cavity (21); When the outer cavity (11) presents a plurality of circular cross-sections of different diameters along the first set direction, when punching the shell raw material plate, first use the punch with the smallest diameter to punch to the maximum depth, so that the outer cavity (11) has a circular cross-section of one diameter, and then use punches of other diameters to punch in order of increasing diameters, so that the outer cavity (11) formed by the second punching has two circular cross-sections of different diameters, and punching is performed in sequence until the outer cavity (11) has a set number of circular cross-sections of different diameters and depths; When the inner cavity (21) presents a plurality of circular cross-sections of different diameters along the second set direction, when punching the outer shell (1), the punch with the smallest diameter is first used for punching, and the punch is punched to the maximum depth, so that the inner cavity (21) has a circular cross-section of one diameter, and then punches with other diameters are used for punching in order of gradually increasing diameters. The inner cavity (21) formed by the second punching has two circular cross-sections of different diameters, and punching is performed in sequence until the inner cavity (21) has a set number of circular cross-section segments of different diameters and depths.

2. The method for manufacturing an air spring housing according to claim 1, Features: When the inner shell (2) is stamped and the outer cavity (11) and the inner cavity (21) formed by stamping include circular cross-sections of various diameters, a transition inclined portion (3) is processed at the junction of the circular cross-sections of various diameters of the outer cavity (11) and the inner cavity (21).

3. The method for manufacturing an air spring housing according to claim 2, Features: Before machining the transition inclined portion (3) at the junction of the circular cross sections of different diameters of the outer cavity (11) and the inner cavity (21), the following steps are also included: Detecting the actual volume of the outer cavity (11); When the actual volume of the outer cavity (11) does not meet the design volume requirement, determining the difference between the actual volume of the outer cavity (11) and the design volume; According to the difference between the actual volume and the designed volume, the design parameters of the transition inclined portion (3) at the junction of the circular cross-sections of different diameters of the outer cavity (11) and the inner cavity (21) are determined so that the actual volume of the outer cavity (11) meets the designed volume requirements; According to the design parameters of the transition inclined portion (3), the transition inclined portion (3) at the junction of the circular cross-sections of different diameters of the outer cavity (11) and the inner cavity (21) is processed.

4. The method for manufacturing an air spring housing according to claim 3, Features: When detecting the actual volume of the outer cavity (11), a liquid having the same volume as the set volume of the outer cavity (11) is injected into the outer cavity (11), and it is determined whether the actual volume of the outer cavity (11) meets the set volume based on whether the liquid overflows and the height of the liquid level.

5. The method for manufacturing an air spring housing according to claim 1, Features: The outer cavity (11) and the inner cavity (21) formed by stamping are coaxial.

6. The method for manufacturing an air spring housing according to claim 1, Features: After the inner shell (2) is stamped, the edges of the outer shell (1) and the inner shell (2) are rounded (4).

7. An air spring housing, Features: The air spring housing is manufactured by the method for manufacturing the air spring housing as described in any one of claims 1 to 6.

8. A car, Features: The invention comprises an air spring manufactured by using the air spring housing as claimed in claim 7.

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