A welding method for conical cambered surface resistance seam welding

Abstract

This invention discloses a welding method for resistance seam welding of a conical arc surface, used for welding conical part I and conical part II, comprising the following steps: 1) assembly; 2) spot welding positioning; 3) marking the path; 4) installing the guide plate; 5) pre-rolling; 6) welding. The welding method of this invention is convenient to operate, requires low skill levels from workers, produces good welding results, and ensures stable welding quality.

Description

Technical Field

[0001] This invention relates to the field of parts welding technology, and in particular to a welding method for resistance seam welding of a tapered arc surface. Background Technology

[0002] Welding is an important technique in parts manufacturing, and many parts are formed through welding. When welding two cylindrical parts, their regular shapes make the welding process convenient and easily achieves excellent weld quality. However, for parts like… Figure 2 When welding the two conical parts shown, the weld seam is conical and prone to misalignment. This requires a high level of skill from the workers and results in inconsistent weld quality. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the existing technology, it is desirable to provide a welding method for resistance seam welding of conical arc surface that is easy to operate, requires low technical level from workers, has good welding effect, and stable welding quality.

[0004] This invention provides a welding method for resistance seam welding of a conical arc surface, used for welding conical part I and conical part II, characterized by comprising the following steps: 1) Assembly; Assemble part I onto the top of part II, and align the parts to be welded to form a tapered arc weld. 2) Spot welding positioning; The intermediate part is obtained by spot welding the tapered arc surface weld seam using resistance spot welding to position it. 3) Mark the path; Mark the tapered arc surface weld with lines to assist in path adjustment during the welding process; 4) Install the guide plate; The guide plate is fixedly installed on the lower electrode shaft of the welding machine. The distance between the guide plate and the lower electrode roller at the end of the lower electrode shaft is the same as the distance between the tapered arc weld and the bottom edge of part II. 5) Pre-roll; The intermediate part is placed on the welding machine and guided by the guide plate. Without the welding current is turned on, the pressure is applied by the lower electrode roller and the upper electrode plate to pre-roll the tapered arc surface weld to reduce the gap left during assembly and spot welding positioning. The pre-rolling indentation can also help adjust the path during the welding process. 6) Welding; The welding current is turned on, and the weld is guided by the guide plate and completed with the help of path marking and indentation.

[0005] Furthermore, in step 1), after part I and part II are assembled, a feeler gauge is used to check the fit between them. If the 0.05mm thick feeler gauge cannot pass through any position of the tapered arc weld, proceed to the next step; otherwise, reassemble or calibrate part I and / or part II.

[0006] Furthermore, in step 2), the resistance spot welding point is located on the welding path, and the size of the spot welding point can be completely covered by the weld after welding.

[0007] Furthermore, in step 3), a height ruler is used to mark the tapered arc weld seam.

[0008] Compared with the prior art, the beneficial effects of the present invention are: The welding method of the present invention greatly reduces the impact of the conical arc surface weld on the welding process through operations such as assembly, spot welding positioning, path marking, installation of guide plates and pre-rolling. It has excellent repeatability, is easy to operate, has low requirements for the technical level of workers, produces good welding results and stable welding quality, and has excellent promotional value for welding parts with similar structures.

[0009] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0010] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the guide plate installation structure; Figure 2 A schematic diagram of the welding structure of the parts; Figure 3 This is a schematic diagram of the welding trajectory without a guide plate.

[0011] The following parts are labeled in the diagram: 1. Part I; 2. Part II; 3. Lower motor shaft; 4. Lower electrode roller; 5. Upper motor shaft; 6. Upper electrode roller; 7. Guide plate. Detailed Implementation

[0012] 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, only the parts relevant to the invention are shown in the accompanying drawings.

[0013] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0014] Please refer to Figures 1-3 The present invention provides a welding method for resistance seam welding of a conical arc surface, used for welding conical part I and conical part II, comprising the following steps: 1) Assembly; Assemble part I1 onto the top of part II2, and align the parts to be welded to form a tapered arc weld. After assembling part I1 and part II2, use a feeler gauge to check the fit between them. If a 0.05mm thick feeler gauge cannot pass through any part of the tapered arc weld, proceed to the next step. Otherwise, reassemble or recalibrate part I and / or part II. 2) Spot welding positioning; The conical arc surface weld is positioned by resistance spot welding to obtain the intermediate part; the weld point of resistance spot welding is located on the welding path, and the size of the weld point can be completely covered by the weld after welding; resistance spot welding can effectively avoid the problem of part warping caused by welding deformation, and ensure that the adjusted assembly gap does not change. 3) Mark the path; A height gauge is used to mark the tapered arc surface weld to assist in path adjustment during the welding process; 4) Install the guide plate; The guide plate 7 is fixedly installed on the lower electrode shaft 3 of the welding machine. The distance between the guide plate 7 and the lower electrode roller 4 at the end of the lower electrode shaft 3 is the same as the distance between the tapered arc weld and the bottom edge of part II2. The guide plate 7 adopts a split structure. After the guide plate 7 is put on the lower electrode shaft 3, it is initially connected by screws. After adjusting the position of the guide plate 7 to meet the requirements, the screws are tightened and the guide plate 7 is firmly fixed on the lower electrode shaft 3. The installation is convenient and the fixation is stable. 5) Pre-roll; The intermediate part is placed on the welding machine and guided by the guide plate 7. Without the welding current is turned on, pressure is applied by the lower electrode roller 4 and the upper electrode plate 6 to pre-roll the tapered arc surface weld to reduce the gap left during assembly and spot welding positioning. The pre-rolling indentation can also assist in path adjustment during the welding process. 6) Welding; The welding current is turned on, and the weld is guided by the guide plate 7. The welding of the tapered arc surface weld is completed with the help of path marking and indentation.

[0015] In this embodiment, when pre-rolling the intermediate part, it is placed on the welding machine, with any position on the inner side of the conical arc weld seam positioned on top of the lower electrode roller 4, and the bottom edge of part II2 resting against the guide plate 7. Then, the upper electrode shaft 5 of the welding machine is controlled to move downward, so that the upper electrode plate 6 presses against the outer side of the conical arc weld seam. The drive mechanism of the welding machine drives the upper electrode shaft 5 to rotate slowly, so that the conical arc weld seam passes between the lower electrode roller 4 and the upper electrode plate 6 one by one to complete the pre-rolling. Throughout the process, the worker manually assists in the pre-rolling of the intermediate part, holding the intermediate part to ensure that the bottom edge of part II2 always rests against the guide plate 7, and ensuring that the indentation is accurately pressed on the conical arc weld seam. This reduces the gap left during assembly and spot welding positioning and forms an indentation with an auxiliary function.

[0016] Workers can master the above welding method in a short time. It has low requirements for workers' technical level, is easy to operate, has good welding effect, and stable welding quality. It has excellent promotion value for welding parts with similar structures.

[0017] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0019] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding method of conical camber resistance seam welding for welding a conical cylindrical part I and a conical cylindrical part II, characterized by, Includes the following steps: 1) Assembly; Assemble part I onto the top of part II, and align the parts to be welded to form a tapered arc weld. 2) Spot welding positioning; The intermediate part is obtained by spot welding the tapered arc surface weld seam using resistance spot welding to position it. 3) Mark the path; Mark the tapered arc surface weld with lines to assist in path adjustment during the welding process; 4) Install the guide plate; The guide plate is fixedly installed on the lower electrode shaft of the welding machine. The distance between the guide plate and the lower electrode roller at the end of the lower electrode shaft is the same as the distance between the tapered arc weld and the bottom edge of part II. 5) Pre-roll; The intermediate part is placed on the welding machine and guided by the guide plate. Without the welding current is turned on, the pressure is applied by the lower electrode roller and the upper electrode plate to pre-roll the tapered arc surface weld to reduce the gap left during assembly and spot welding positioning. The pre-rolling indentation can also help adjust the path during the welding process. 6) Welding; The welding current is turned on, and the weld is guided by the guide plate and completed with the help of path marking and indentation.

2. The method of resistance seam welding a tapered cambered surface according to claim 1, wherein In step 1), after part I and part II are assembled, a feeler gauge is used to check the fit between them. If the 0.05mm thick feeler gauge cannot pass through any position of the tapered arc weld, proceed to the next step; otherwise, reassemble or calibrate part I and / or part II.

3. The method of resistance spot welding a tapered cambered surface of claim 1, wherein, In step 2), the resistance spot welding point is located on the welding path, and the size of the spot can be completely covered by the weld after welding.

4. The method of welding of claim 1, wherein, In step 3), a height ruler is used to mark the tapered arc surface weld.

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