Processing method of special-shaped complex welding assembly

Abstract

This invention discloses a method for processing irregularly shaped complex welded components, belonging to the field of irregularly shaped welded component processing technology, to solve the problems of low processing efficiency and high quality risk in existing technologies for processing irregularly shaped complex welded components. The method includes determining the centerline of the irregularly shaped complex welded component and judging whether the centerline is accurate; using the determined centerline as a reference, fixing the irregularly shaped complex welded component on a processing platform, aligning the centerline, and then fixing it; processing the mating parts of the irregularly shaped complex welded component in a single clamping operation; and drawing reference lines on the irregularly shaped complex welded component for subsequent mating reference with other components. This invention can be used for processing irregularly shaped complex welded components.

Description

Technical Field

[0001] This invention belongs to the field of irregular welding component processing technology, and in particular relates to a processing method for irregular complex welding components. Background Technology

[0002] Metal welding is a manufacturing process and technology that joins metals or other thermoplastic materials by heating, high temperature, or high pressure. Cold working of metals, on the other hand, involves subjecting the metal to sufficient mechanical stress, resulting in plastic deformation and a permanent change in the metal's crystal structure.

[0003] Currently, the processing needs of parts and components are diverse, and processing methods that combine welding, cold metal processing, and other methods are very common. Moreover, parts and components processing often exhibits a trend towards complex and irregular shapes.

[0004] In existing technologies, welding of irregularly shaped parts is carried out directly on the equipment during installation and alignment. This process is time-consuming, inefficient, and inaccurate, which can easily lead to serious dimensional deviations in the products, frequent quality problems, and high quality risks. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a processing method for irregularly shaped complex welded components, in order to solve the technical problems of low processing efficiency and high quality risk in existing processing methods for irregularly shaped complex welded components.

[0006] The objective of this invention is mainly achieved through the following technical solutions.

[0007] This invention provides a method for processing irregularly shaped complex welding components, comprising the following steps:

[0008] Step 1: Determine the centerline of the irregularly shaped complex welding assembly and determine if the centerline is accurate. If not, redetermine the centerline of the irregularly shaped complex welding assembly. If it is accurate, proceed to Step 2.

[0009] Step 2: Using the center line determined in Step 1 as a reference, fix the irregular complex welding component on the processing platform. After aligning the center line, fix it and process the joint of the irregular complex welding component in one clamping.

[0010] Step 3: Draw reference lines on the irregularly shaped and complex welding components for subsequent docking with other parts.

[0011] Furthermore, all mating parts of the irregularly shaped and complex welding components must be completely processed through a single clamping in step 2, without being clamped again in between.

[0012] Furthermore, in step 1, the centerline includes a horizontal centerline and a vertical centerline. Determining whether the centerline is accurate includes the following steps:

[0013] Determine whether the horizontal center lines of the upper and lower ends of the complex welded assembly are on the same horizontal plane.

[0014] Determine whether the vertical center lines of the upper and lower ends of a complex, irregularly shaped welded assembly are on the same vertical plane.

[0015] Further, step 1 includes the following steps:

[0016] Step 11: Process the main body of the irregularly shaped and complex welded components;

[0017] Step 12: Initially determine the horizontal and vertical center lines of the main body of the irregularly shaped complex welding assembly using conformal tooling and reference scribing lines;

[0018] Step 13: Verify the accuracy of the horizontal and vertical center lines through trial processing.

[0019] Furthermore, in step 13, verifying the accuracy of the horizontal and vertical center lines through trial processing includes the following steps:

[0020] Cut the mating area from the upper and lower ends of the irregularly shaped complex welding component, respectively. Determine whether the cutting amount of the upper end and the cutting amount of the lower end are within the threshold range. If they are, it means that the horizontal center line and the vertical center line are accurate. If not, repeat step 11.

[0021] Furthermore, the irregularly shaped and complex welded components are rotating parts, cabin-type parts, or shell parts.

[0022] Furthermore, the irregularly shaped and complex welded components are thin-walled structures or multi-cavity structures.

[0023] Furthermore, the irregularly shaped and complex welded components are used in automobile fuel tanks.

[0024] Furthermore, the automobile fuel tank includes a fuel tank shell, a fuel tank body located inside the fuel tank shell, a mounting platform located on the upper end face of the fuel tank shell, and a connecting plate located on the lower end face of the fuel tank shell.

[0025] Furthermore, the main body of the automobile fuel tank consists of the fuel tank shell and the fuel tank body, while the docking parts of the automobile fuel tank are the mounting platform and the connecting plate.

[0026] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0027] The processing method for irregularly shaped complex welding components provided by this invention mainly targets the processing of the mating parts of irregularly shaped complex welding components. Before clamping the irregularly shaped complex welding components, the center line of the irregularly shaped complex welding components is first determined. During the subsequent clamping and processing, the determined and accurate center line can be used as a reference for clamping and processing, eliminating the need for repeated alignment during clamping and processing. This simplifies the alignment process and reduces the alignment time for irregularly shaped complex welding components, improves processing efficiency, and ultimately improves the processing accuracy of irregularly shaped complex welding components.

[0028] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0030] Figure 1 A flowchart illustrating the processing method for irregularly shaped complex welding components provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of an automobile fuel tank in the processing method of the irregularly shaped complex welding assembly provided in Embodiment 1 of the present invention;

[0032] Figure 3 This is a schematic diagram of the conformal tooling in the processing method of the irregularly shaped complex welding assembly provided in Embodiment 1 of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the horizontal detection and adjustment component in the processing method of the irregular complex welding component provided in Embodiment 1 of the present invention, wherein the lower surface of the first sub-body and the lower surface of the second sub-body are on the same horizontal plane;

[0034] Figure 5 This is a schematic diagram of the horizontal detection and adjustment component in the processing method of the irregular complex welding component provided in Embodiment 1 of the present invention, wherein the lower surface of the first sub-body and the lower surface of the second sub-body are not on the same horizontal plane.

[0035] Figure label:

[0036] 1-Fuel tank housing; 2-Mounting platform; 3-Connecting plate; 4-Mounting body; 5-First support body; 6-Second support body; 7-First protrusion; 8-Second protrusion; 9-First adjusting column; 10-Second adjusting column; 11-Infrared transmitter; 12-Horizontal infrared receiver; 13-Offset infrared receiver. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0038] After the metal welding of irregular and complex welded components, deformation problems caused by hot working are inevitable. This deformation problem will seriously affect the subsequent processing of other components (such as the mating parts), making it impossible to meet the subsequent processing and assembly requirements, and even leading to the scrapping of the entire irregular and complex welded component.

[0039] This invention provides a method for processing irregularly shaped and complex welding components, see [link to documentation]. Figure 1 It includes the following steps:

[0040] Step 1: Determine the centerline of the irregularly shaped complex welding assembly and determine if the centerline is accurate. If not, redetermine the centerline of the irregularly shaped complex welding assembly. If it is accurate, proceed to Step 2.

[0041] Step 2: Using the center line determined in Step 1 as a reference, fix the irregular complex welding component on the processing platform. After aligning the center line, fix it and process the joint of the irregular complex welding component in one clamping.

[0042] It should be noted that "one-time clamping" refers to processing the mating parts using a single processing machine, a single processing step, and a single clamping. All mating parts must be fully processed through this single clamping, without any further clamping in between.

[0043] Step 3: Draw reference lines on the irregularly shaped and complex welding components for subsequent docking with other parts.

[0044] For example, the aforementioned irregularly shaped complex welding components can be rotating parts, cabin-type parts, or shell parts, etc. The structures of these irregularly shaped complex welding components are mostly thin-walled parts or multi-cavity structures.

[0045] Compared with the prior art, the processing method for irregular and complex welded components provided by the present invention mainly targets the processing of the mating parts of the irregular and complex welded components. Before clamping the irregular and complex welded components, the center line of the irregular and complex welded components is determined first. In the subsequent clamping and processing, the determined and accurate center line can be used as a reference for clamping and processing, eliminating the need for repeated alignment during clamping and processing. This simplifies the alignment process and reduces the alignment time for irregular and complex welded components, improves processing efficiency, and ultimately improves the processing accuracy of irregular and complex welded components.

[0046] Specifically, in step 1 above, the centerline includes a horizontal centerline and a vertical centerline. Determining whether the centerline is accurate includes the following steps:

[0047] Determine whether the horizontal center lines of the upper and lower ends of the complex welded assembly are on the same horizontal plane.

[0048] Determine whether the vertical center lines of the upper and lower ends of the irregularly shaped complex welded assembly are on the same vertical plane. It should be noted that accurate center lines mean that the horizontal center lines of the upper and lower ends of the irregularly shaped complex welded assembly are on the same horizontal plane, and that the vertical center lines of the upper and lower ends of the irregularly shaped complex welded assembly are on the same vertical plane 5.

[0049] To improve the accuracy of centerline determination, step 1 includes the following steps:

[0050] Step 11: Process the main body of the irregularly shaped and complex welded components;

[0051] Step 12: Initially determine the horizontal and vertical center lines of the main body of the irregularly shaped complex welding assembly by means of conformal tooling and reference scribing;

[0052] Step 13: Verify the accuracy of the horizontal and vertical center lines through trial processing.

[0053] Specifically, step 13 above, verifying the accuracy of the horizontal and vertical center lines through trial processing, includes the following steps:

[0054] Cut the mating area from both the top and bottom surfaces of the irregularly shaped, complex welding assembly.

[0055] Determine whether the cutting amount of the upper end face and the cutting amount of the lower end face are within the threshold range. If yes, step 5 indicates that the horizontal center line and the vertical center line are accurate. If not, repeat step 11.

[0056] Example 1

[0057] This embodiment provides a method for processing irregularly shaped complex welded components, wherein the irregularly shaped complex welded component is an automobile fuel tank, and the structure of the automobile fuel tank is described in [reference needed]. Figure 2 It includes a fuel tank housing 1, a fuel tank body located inside the fuel tank housing 1, a mounting platform 2 located on the upper end face of the fuel tank housing 1, and a connecting plate 3 located on the lower end face of the fuel tank housing 1. It should be noted that the main body of the automobile fuel tank refers to the fuel tank housing 1 and the fuel tank body, and the docking part of the automobile fuel tank refers to the mounting platform 2 and the connecting plate 3 fixedly connected to the automobile body. Usually, the connecting plate 3 is detachably fixedly connected to the automobile body by screws or mutually cooperating bolts and nuts.

[0058] 5. Accordingly, the processing method for automobile fuel tanks includes the following steps:

[0059] Step a: Machining the fuel tank body and fuel tank shell 1 of the automobile fuel tank;

[0060] Step b: Initially determine the horizontal centerline of the fuel tank shell 1 of the automobile fuel tank by means of conformal tooling and reference scribing;

[0061] Step c: Verify the accuracy of the horizontal and vertical center lines by trial machining. Cut the mounting platform 2 and the connecting plate 3 from the upper and lower ends of the fuel tank shell 1 of the car fuel tank, respectively. Determine whether the cutting amount of the upper end mounting platform 2 and the cutting amount of the lower end connecting plate 3 are within the threshold range. If yes, it means that the center line is accurate. If not, repeat step b.

[0062] Step d: Using the horizontal center line determined in step c as a reference, fix the car fuel tank on the processing platform. After aligning the horizontal center line, fix it. Then, process the mounting platform 2 and connecting plate 3 of the car fuel tank in one clamping operation.

[0063] Step e: Draw docking reference lines on mounting platform 2 and connecting plate 3 for subsequent docking with other components.

[0064] For example, in step b above, the structure of the conformal tooling is as follows:

[0065] See the conformal tooling. Figures 3 to 5 The system includes a mounting body 4, a first support body 5, a second support body 6, a first protrusion 7, and a second protrusion 8. The first support body 5 is suspended at one end of the mounting body 4, and the second support body 6 is suspended at the other end of the mounting body 4. The first support body 5, the mounting body 4, and the second support body 6 form a U-shape. The first protrusion 7 is suspended on the side of the first support body 5 facing the second support body 6, and the second protrusion 8 is suspended on the side of the second support body 6 facing the first support body 5. The first protrusion 7 and the second protrusion 8 are coaxially arranged with their axes parallel to the mounting body 4. The first protrusion 7 is inserted into the through hole on the upper end face of the fuel tank housing 1 and cooperates with the through hole. The second protrusion 8 is inserted into the through hole on the lower end face of the fuel tank housing 1 and cooperates with the through hole, so that the fuel tank housing 1 is suspended above the mounting body 4.

[0066] This is because the fuel tank shell 1 will inevitably deform after welding and assembly. In particular, the deformation of the lower end face of the fuel tank shell 1 may affect the accuracy of determining the horizontal center line. By using the conformal tooling with the above structure, the fuel tank shell 1 is suspended above the mounting body 4. The conformal tooling and the entire automobile fuel tank are placed on the processing platform, which can avoid the influence of the deformation of the lower end face of the fuel tank shell 1 on the determination of the horizontal center line and improve the accuracy of determining the horizontal center line.

[0067] To accommodate automotive fuel tanks of varying lengths, the mounting body 4 is a split structure, comprising a horizontally positioned first sub-body and a second sub-body. The lower surfaces of the first and second sub-body are on the same horizontal plane. One end of the first sub-body is detachably and fixedly connected to the second sub-body. A first support body 5 is located at the other end of the first sub-body, and a second support body 6 is located at the other end of the second sub-body. The diameter of the first protrusion 7 gradually decreases in the direction moving away from the first support body 5; for example, the surface of the first protrusion 7 can be stepped. Similarly, the diameter of the second protrusion 8 gradually decreases in the direction moving away from the second support body 6; for example, the surface of the second protrusion 8 can be stepped. Thus, on the one hand, the through-holes on the automotive fuel tank can be adapted to different through-holes or automotive fuel tanks of different lengths by cooperating with the first protrusion 7 and the second protrusion 8 of different diameters. On the other hand, the vertical plane of the steps can also horizontally limit the movement of the automotive fuel tank, thereby ensuring the stability of the fuel tank during the determination of the horizontal centerline.

[0068] It is worth noting that in order to accommodate car fuel tanks of different lengths and to complete the installation of the car fuel tank, the mounting body 4 needs to be set as a split structure. However, if the connection between the first sub-body and the second sub-body is not stable, it may cause the lower surface of the first sub-body and the lower surface of the second sub-body to not be on the same horizontal plane. In order to ensure the accuracy of the horizontal center line measurement each time, the above-mentioned conformal tooling also includes a horizontal detection and adjustment component, which is used to detect whether the lower surface of the first sub-body and the lower surface of the second sub-body are on the same horizontal plane, and to adjust the lower surface of the first sub-body and the lower surface of the second sub-body to the same horizontal plane.

[0069] Specifically, the aforementioned horizontal detection and adjustment assembly includes a first adjustment column 9, a second adjustment column 10, an infrared emitter 11, a horizontal infrared receiver 12, and multiple offset infrared receivers 13. The output end of the first adjustment column 9 is fixedly connected to one end of the mounting body 4, and the output end of the second adjustment column 10 is fixedly connected to the other end of the mounting body 4. The infrared emitter 11 is disposed on the first adjustment column 9, and the horizontal infrared receiver 12 and the offset infrared receiver 13 are disposed on the second adjustment column 10. When the lower surface of the first sub-body and the lower surface of the second sub-body are at the same horizontal plane, the horizontal infrared receiver 12 is located on the infrared light propagation path of the infrared emitter 11. When the lower surface of the first sub-body and the lower surface of the second sub-body are not at the same horizontal plane, one of the multiple offset infrared receivers 13 is located on the infrared light propagation path of the infrared emitter 11.

[0070] Based on the structure of the horizontal detection and adjustment component, before determining the horizontal centerline of the fuel tank housing 1, the following steps are also included:

[0071] Step A: Turn on the infrared transmitter 11, the horizontal infrared receiver 12, and the offset infrared receiver 13;

[0072] Step B: Determine whether the horizontal infrared receiver 12 receives the infrared signal sent by the infrared transmitter 11. If yes, it means that the lower surface of the first sub-body and the lower surface of the second sub-body are on the same horizontal plane. If no, it means that one of the multiple offset infrared receivers 13 receives the infrared signal sent by the infrared transmitter 11, and proceed to step C.

[0073] Step C: Calculate the offset distance between the offset infrared receiver 13 and the horizontal infrared receiver 12 that received the infrared signal;

[0074] Step D: Drive the first adjusting column 9 and / or the second adjusting column 10 according to the offset distance so that the lower surface of the first sub-body and the lower surface of the second sub-body are on the same horizontal plane.

[0075] In addition, in order to reduce the displacement between the first and second sub-body due to the split design, the connecting surface of the first and second sub-body is serrated. Through the interlocking serrations, the individual teeth can support each other, thereby reducing the displacement between the first and second sub-body due to the split design.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for processing irregularly shaped complex welding components, characterized in that, The complex, irregularly shaped welding component is an automotive fuel tank. The main body of the fuel tank consists of the tank shell and the tank body, while the mating parts are the mounting platform and the connecting plate. The processing method includes: Step a: Machining the tank body and the tank shell of the automotive fuel tank; Step b: Initially determining the horizontal centerline of the tank shell of the automotive fuel tank using conformal tooling and reference marking; Step c: Verifying the accuracy of the horizontal and vertical centerlines through trial machining. Cutting is performed on the mounting platform and the connecting plate from the upper and lower ends of the tank shell of the automotive fuel tank, respectively. It is determined whether the cutting amount of the upper end of the mounting platform and the lower end of the connecting plate are within the threshold range. If so, the centerline is accurate; otherwise, Step b is repeated; Step d: Using the horizontal centerline determined in Step c as a reference, the automotive fuel tank is fixed on the machining platform. After aligning the horizontal centerline, it is fixed, and the mounting platform and connecting plate of the automotive fuel tank are machined in one clamping operation; Step e: Marking the mating reference lines on the mounting platform and the connecting plate. In step b, the conformal fixture includes a mounting body, a first support body, a second support body, a first protrusion, a second protrusion, and a horizontal detection and adjustment component. The first support body is vertically mounted at one end of the mounting body, and the second support body is vertically mounted at the other end of the mounting body. The first support body, the mounting body, and the second support body form a U-shape. The first protrusion is vertically mounted on the side of the first support body facing the second support body, and the second protrusion is vertically mounted on the side of the second support body facing the first support body. The first and second protrusions are coaxially arranged with their axes parallel to the mounting body. The first protrusion is inserted into a through hole on the upper end face of the oil tank housing and cooperates with the through hole. The second protrusion is inserted into a through hole on the lower end face of the oil tank housing and cooperates with the through hole, so that the oil tank housing is suspended above the mounting body. The mounting body is a split structure, including a horizontally arranged first sub-body and a second sub-body. The lower surfaces of the first sub-body and the second sub-body are located on the same horizontal plane. One end of the first sub-body is detachably and fixedly connected to the second sub-body. The first support body is located at the other end of the first sub-body, and the second support body is located at the other end of the second sub-body.

2. The processing method for irregularly shaped complex welding components according to claim 1, characterized in that, The centerline includes a horizontal centerline and a vertical centerline. Determining whether the centerline is accurate includes the following steps: Determine whether the horizontal center lines of the upper and lower ends of the complex welded assembly are on the same horizontal plane. Determine whether the vertical center lines of the upper and lower ends of a complex, irregularly shaped welded assembly are on the same vertical plane.

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