Tailor welding structure for improving welding seam quality of waveguide flat flange

Abstract

The utility model belongs to the technical field of welding processing, and particularly relates to a tailor-welding structure for improving the welding seam quality of a waveguide flat flange. Comprising waveguide tubes and flat flanges. A waveguide tube positioning step is arranged on the periphery of the end part of the waveguide tube; the axial length of the waveguide tube positioning step is smaller than the thickness of the flat flange; an axial through hole is formed in the flat flange; a flat flange positioning step is arranged on the inner circumference of one end of the axial through hole; the outer periphery of the waveguide tube positioning step is matched with the inner periphery of the flat flange positioning step. According to the utility model, the continuity and the quality of the welding seam of the waveguide assembly are ensured by improving the structural form of the welding part of the flat flange and the waveguide and the brazing method during manual brazing. After brazing forming, machining of the end face of the flat flange does not affect the integrity of a weld joint, residues of cooling liquid and surface solutions in the subsequent machining process are avoided, and meanwhile the risk of corrosion in the using process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding processing, and in particular relates to a tailor-welded structure for improving the quality of the welding seam of a waveguide flat flange. Background Art

[0002] Waveguide assemblies are widely used in radar products. They are a specialized structure used to conduct and transmit electrical signals. Due to space constraints, multiple waveguide transmission assemblies must be connected via flanges to form a continuous, closed channel. Therefore, flat flanges are typically welded to one or both ends of the waveguide assembly. The flange end faces are then machined after welding to ensure airtightness and electromagnetic compatibility of the transmission channel.

[0003] Currently, if Figure 1 Universal flat flange waveguide assemblies with tailor-welded structures. During manual brazing, positioning steps on the narrow side of the waveguide are used in conjunction with positioning holes in the center of the universal flat flange. The universal flat flange is positioned upward by clamping the outer wall of the waveguide. Brazing filler metal is added to the assembly gap at the end of the universal flat flange and then welded together. The remaining margin on the end of the universal flat flange is then removed through machining. Waveguide assembly welds formed using this method have the following main disadvantages:

[0004] 1. The wide side of the universal flat flange and the waveguide has no limiting step surface, which makes it difficult for solder to accumulate. This can easily lead to incomplete and discontinuous welds on the back, and can easily leave acid and alkali residues from the surface treatment.

[0005] 2. The waveguide tube and the universal flat flange are welded together in a free state, which easily causes the end face of the universal flat flange to be not perpendicular to the center of the waveguide, resulting in uneven thickness of the universal flat flange after removing the end face allowance.

[0006] 3. After removing the end face allowance of the universal flat flange, part of the formed weld will be directly destroyed. Utility Model Content

[0007] In view of this, in order to improve the weld quality of the flat flange welding part of this type of waveguide component, meet the processing requirements of the flat flange end face after brazing without damaging the formed weld, ensure the installation and use requirements of the waveguide component after processing and forming and reduce the possibility of corrosion during use, the utility model provides a welding structure for improving the quality of the waveguide flat flange weld.

[0008] The technical solution of the utility model is:

[0009] A tailor-welded structure for improving the weld quality of a waveguide flat flange, the tailor-welded structure comprising a waveguide tube and a flat flange; a waveguide tube positioning step is provided on the outer periphery of the end of the waveguide tube, and the axial length of the waveguide tube positioning step is less than the thickness of the flat flange;

[0010] An axial through hole is provided on the flat flange; a flat flange positioning step is provided on the inner periphery of one end of the axial through hole; the outer periphery of the waveguide positioning step is matched with the inner periphery of the flat flange positioning step;

[0011] When welding the waveguide tube to the flat flange, the end of the waveguide tube is inserted into the flat flange positioning step based on the waveguide tube positioning step; the weld is located between the end face of the flat flange and the root of the waveguide tube positioning step.

[0012] Furthermore, the tailor-welded structure further includes a core block. When welding the flat flange to the waveguide, the core block is inserted into the axial through hole from the end of the flat flange away from the waveguide, with at least a portion of the core block extending into the end of the waveguide. The core block is used to limit relative radial movement between the end of the waveguide and the axial through hole.

[0013] Furthermore, the axial through hole is a polygonal hole; a clearance hole is provided at the angle of the axial end of the waveguide positioning step.

[0014] Furthermore, the relief hole forms a welding degassing angle.

[0015] Furthermore, the end of the waveguide tube is clearance-fitted with the axial through hole.

[0016] Furthermore, the core block limits the perpendicularity between the axial direction of the waveguide and the end surface of the flat flange to be no greater than 0.1 mm.

[0017] The beneficial effects of the utility model are:

[0018] This new design improves the structural form of the flat flange and waveguide weld, as well as the manual brazing method, to ensure the continuity and quality of the waveguide assembly weld. After brazing, machining the flat flange end face does not affect the integrity of the weld, preventing the presence of coolant and surface solutions during subsequent processing and reducing the risk of corrosion during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is an assembly diagram of a flat flange and a universal waveguide in the prior art;

[0021] Figure 2 This is a structural diagram of a flat flange of the utility model;

[0022] Figure 3 This is a structural diagram of the waveguide tube of the present utility model;

[0023] Figure 4 This is an assembly diagram of the flat flange of the utility model and the waveguide of the utility model;

[0024] Figure 5 This is an assembly diagram of the flat flange and the waveguide tube of the utility model when they are manually brazed after being inserted into the positioning tool core block;

[0025] Among them: 1. waveguide tube; 11. waveguide tube positioning step; 2. flat flange; 21. axial through hole; 22. flat flange positioning step; 23. clearance hole; 3. core block. DETAILED DESCRIPTION

[0026] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0027] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0028] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0030] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0031] In one embodiment of the present invention, a tailor-welded structure for improving the quality of waveguide flat flange welds is proposed. Figure 2-Figure 5 The tailor-welded structure includes a waveguide tube 1 and a flat flange 2; a waveguide tube positioning step 11 is provided on the outer periphery of the end of the waveguide tube 1, and the axial length of the waveguide tube positioning step 11 is less than the thickness of the flat flange 2;

[0032] The flat flange 2 is provided with an axial through hole 21; a flat flange positioning step 22 is provided on the inner periphery of one end of the axial through hole 21; the outer periphery of the waveguide positioning step 11 is aligned with the inner periphery of the flat flange positioning step 22;

[0033] When welding the waveguide 1 and the flat flange 2, the end of the waveguide 1 is inserted into the flat flange positioning step 22 based on the waveguide positioning step 11; the weld is between the end face of the flat flange 2 and the root of the waveguide positioning step 11.

[0034] In this embodiment, the tailor-welded structure further includes a core block 3. During welding of the flat flange 2 to the waveguide 1, the core block 3 is inserted into the axial through-hole 21 from the end of the flat flange 2 distal from the waveguide 1, with at least a portion of the core block 3 extending into the end of the waveguide 1. The core block 3 serves to limit relative radial movement between the end of the waveguide 1 and the axial through-hole 21.

[0035] In this embodiment, the axial through hole 21 is a polygonal hole; a clearance hole 23 is provided at the angle of the axial end of the waveguide positioning step 11.

[0036] In this embodiment, the clearance hole 23 forms a welding degassing angle.

[0037] In this embodiment, the end portion of the waveguide tube 1 is clearance-fitted with the axial through hole 21.

[0038] In this embodiment, the core block 3 limits the perpendicularity between the axial direction of the waveguide 1 and the end surface of the flat flange 2 to be no greater than 0.1 mm.

[0039] The detailed implementation method of the present invention is described using a standard waveguide 1 (BJ100) and a flat flange 2 as follows:

[0040] 1) Press Figure 2 , process the positioning steps (depth 3mm) of the flat flange 2 of the present invention and the Φ1.5 circular holes at the four corners, and leave a 0.5mm processing allowance on the end face of the flat flange 2.

[0041] 2) Press Figure 3 , processing the matching size of the welding part of the waveguide tube 1 of the utility model (length 3.5mm),

[0042] 3) Press Figure 4 After the flat flange 2 is matched with the waveguide tube 1, the assembly clearance between the outer wall side of the waveguide tube 1 and the side of the flat flange positioning step 22 and the assembly surface of the waveguide tube 1 mouth and the flat flange positioning step 22 are met through fitting, and the assembly clearance is no more than 0.2mm.

[0043] 4) Press Figure 5 After the cleaned waveguide 1 and flat flange 2 are positioned by inserting the positioning tool core block 3 into the waveguide cavity, the end face of the flat flange 2 is placed flat on the brazing platform. Ensure that the verticality between the end face of the waveguide 1 and the center of the waveguide is no more than 0.1mm.

[0044] 5) During manual brazing, add brazing material from the assembly gap between the back of the flat flange 2 and the waveguide 1 and apply a vertical downward pressure on the upper end of the waveguide 1 to allow the brazing material to fill the circular hole.

[0045] 6) After tailor-welding, trim the weld inside the cavity and machine off the margin on the end face of the flat flange 2 to ensure the assembly dimensions of the waveguide assembly and the surface dimension requirements of the end face.

[0046] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A tailor-welded structure for improving the quality of waveguide flat flange welds, characterized in that The tailor-welded structure includes a waveguide tube and a flat flange; a waveguide tube positioning step is provided on the outer periphery of the end of the waveguide tube, and the axial length of the waveguide tube positioning step is less than the thickness of the flat flange; An axial through hole is provided on the flat flange; a flat flange positioning step is provided on the inner periphery of one end of the axial through hole; the outer periphery of the waveguide positioning step is matched with the inner periphery of the flat flange positioning step; When welding the waveguide tube and the flat flange, the end of the waveguide tube is sleeved into the flat flange positioning step based on the waveguide tube positioning step; the weld is located between the end face of the flat flange and the root of the waveguide tube positioning step.

2. The tailor-welded structure with high waveguide flat flange weld quality according to claim 1 is characterized in that The tailor-welded structure further includes a core block; when welding the flat flange and the waveguide tube, the core block is inserted into the axial through hole from the end of the flat flange away from the waveguide tube and at least a portion of the core block reaches the port of the waveguide tube; the core block is used to limit the relative radial swing between the end of the waveguide tube and the axial through hole.

3. The tailor-welded structure with high waveguide flat flange weld quality according to claim 2 is characterized in that The axial through hole is a polygonal hole; a clearance hole is provided at the angle of the axial end of the waveguide tube positioning step.

4. The tailor-welded structure with high waveguide flat flange weld quality according to claim 3 is characterized in that , the said relief hole forms a welding degassing angle.

5. The tailor-welded structure with high waveguide flat flange weld quality according to claim 4 is characterized in that , there is a clearance fit between the end of the waveguide tube and the axial through hole.

6. The tailor-welded structure with high waveguide flat flange weld quality according to claim 5 is characterized in that , the core block limits the verticality between the axial direction of the waveguide tube and the end face of the flat flange to no more than 0.1 mm.

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