Welded structure of brazed metal workpieces

Abstract

This application provides a fusion welding structure for brazing metal workpieces. The aforementioned fusion welding structure for brazing metal workpieces includes a high-frequency generator and an induction copper tube. The high-frequency generator is electrically connected to the induction copper tube, which is spirally wound to form a hot-melt welding hole. The pitch of the spiral is equal to the diameter of the induction copper tube. The brazing filler ring and the end of each metal workpiece near the brazing filler ring are housed together at the hot-melt welding hole, and the distance between the peripheral wall of each metal workpiece and the wall of the hot-melt welding hole is at least 1.5 mm. The aforementioned fusion welding structure for brazing metal workpieces improves brazing efficiency and enhances the stability of the brazing weld.

Description

Technical Field

[0001] This utility model relates to the field of metal brazing technology, and in particular to a fusion welding structure for brazing metal workpieces. Background Technology

[0002] Brazing includes copper soldering and silver soldering. Brazing involves placing copper-based or silver-based filler metal at the joint between two components. The filler metal is then melted by a jet torch and applied to the joint, connecting the two components. During this process, it is crucial to prevent the joint from melting. However, due to the high and fluctuating temperature of the jet torch flame and the need for manual operation, localized overheating of the filler metal or oxidation of the joint can easily occur, affecting brazing stability. Therefore, high-frequency induction heating or laser heating is now more commonly used, but these methods have the following disadvantages:

[0003] 1. The energy conversion rate of high-frequency induction heating and laser heating is relatively low, which affects the efficiency of brazing;

[0004] 2. High-frequency induction heating is a uniform heating process, which can easily cause overheating of both components, affecting the stability of the brazing weld.

[0005] 3. Laser heating requires pretreatment of highly reflective metals, which affects the preparation efficiency. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fusion welding structure for brazed metal workpieces that can improve brazing efficiency and brazing stability.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A fusion welding structure for brazing metal workpieces, used for fusion welding of brazing metal workpieces, wherein the brazing metal workpiece includes a brazing filler ring and two metal weldments, the brazing filler ring is sandwiched between the two metal weldments, and the brazing filler ring is arranged circumferentially around either of the metal weldments;

[0009] The fusion welding structure of the brazed metal workpiece includes a high-frequency generator and an induction copper tube. The high-frequency generator is electrically connected to the induction copper tube. The induction copper tube is spirally bent to form a hot melt welding hole. The pitch of the spiral bend is equal to the diameter of the induction copper tube. The brazing filler ring and the end of each metal workpiece near the brazing filler ring are housed together at the hot melt welding hole. The distance between the peripheral wall of each metal workpiece and the wall of the hot melt welding hole is at least 1.5 mm.

[0010] In one embodiment, the distance between the peripheral wall of each of the metal weldments and the wall of the hot melt weld hole is 1.5 mm to 2.3 mm.

[0011] In one embodiment, the number of turns of the induction copper tube spiral is proportional to the maximum diameter of each of the metal weldments.

[0012] In one embodiment, when the maximum diameter of each of the metal weldments is less than 50 mm, the number of turns of the induction copper tube spiral bend is 2 to 3.

[0013] In one embodiment, when the maximum diameter of each of the metal weldments is 50mm to 70mm, the number of turns of the induction copper tube spiral bend is 3 to 4.

[0014] In one embodiment, when the maximum diameter of each of the metal weldments is greater than 70 mm, the number of turns of the induction copper tube spiral bend is 3 to 4.

[0015] In one embodiment, the sensing copper tube is provided with a cooling through hole extending along the length direction of the sensing copper tube, the extension direction of the cooling through hole being parallel to the length direction of the sensing copper tube, and the cooling through hole being used to introduce cooling water.

[0016] In one embodiment, the diameter of the cooling through hole is 5mm to 7mm.

[0017] In one embodiment, the diameter of the sensing copper tube is 7.5 mm to 8.5 mm.

[0018] In one embodiment, a high-temperature resistant glass fiber sleeve is fitted onto the induction copper tube, and the induction copper tube and the high-temperature resistant glass fiber sleeve are spirally wound together to form the hot melt welding hole.

[0019] In one embodiment, the diameter of the high-temperature resistant glass fiber sleeve is 9.5 mm to 10 mm.

[0020] In one embodiment, the solder ring is a copper-based solder ring or a silver-based solder ring.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] The fusion welding structure of this invention for brazing metal workpieces combines a high-frequency generator with an induction copper tube. The induction copper tube is spirally bent to form a hot-melt welding hole, with the spiral pitch equal to the diameter of the induction copper tube. The brazing ring and the end of each metal workpiece near the brazing ring are housed together in the hot-melt welding hole, and the distance between the peripheral wall of each metal workpiece and the hole wall is at least 1.5mm. This means that resistance is directly applied to the contact surface of the brazing ring and the end of each metal workpiece near the brazing ring, eliminating the need for pretreatment of the end of each metal workpiece near the brazing ring. The edge effect can be used to concentrate the heating of the brazing ring and the end of each metal workpiece near the brazing ring, avoiding overall overheating of each metal workpiece. It also has a high energy conversion rate and can continuously produce brazed metal workpieces, thus significantly improving brazing efficiency and welding stability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the fusion welding structure of a brazed metal workpiece according to one embodiment of the present invention.

[0025] Figure 2 for Figure 1 The diagram shows the usage status of the fusion welded structure of the brazed metal workpiece.

[0026] Figure 3 for Figure 2 Another schematic diagram of the fusion welding structure of the brazed metal workpiece shown;

[0027] Figure 4 for Figure 2 A cross-sectional view of the fusion weld structure of the brazed metal workpiece shown.

[0028] Figure 5 for Figure 4 A magnified view of part A of the fusion weld structure of the brazed metal workpiece shown. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This application provides a fusion welding structure for brazing metal workpieces. The aforementioned fusion welding structure includes a high-frequency generator and an induction copper tube. The high-frequency generator is electrically connected to the induction copper tube, which is spirally wound to form a hot-melt welding hole. The pitch of the spiral is equal to the diameter of the induction copper tube. The brazing filler ring and the end of each metal workpiece near the brazing filler ring are housed together at the hot-melt welding hole, and the distance between the peripheral wall of each metal workpiece and the wall of the hot-melt welding hole is at least 1.5 mm.

[0033] The aforementioned fusion welding structure for brazed metal workpieces combines a high-frequency generator with an induction copper tube. The induction copper tube is spirally wound to form a hot-melt welding hole, with the spiral pitch equal to the diameter of the induction copper tube. The brazing ring and the end of each metal workpiece near the brazing ring are housed together at the hot-melt welding hole, and the distance between the peripheral wall of each metal workpiece and the hole wall of the hot-melt welding hole is at least 1.5 mm. This means that resistance acts directly on the contact surface of the brazing ring and the end of each metal workpiece near the brazing ring, eliminating the need for pretreatment of the end of each metal workpiece near the brazing ring. The edge effect can be used to concentrate the heating of the brazing ring and the end of each metal workpiece near the brazing ring, avoiding overall overheating of each metal workpiece. It also has a high energy conversion rate and can continuously produce brazed metal workpieces, thus significantly improving brazing efficiency and welding stability.

[0034] To better understand the fusion welding structure of the brazed metal workpiece of this application, the following further explanation is provided:

[0035] Please refer to the following: Figures 1 to 5One embodiment of the brazing metal workpiece 10a includes a brazing filler ring 100a and two metal weldments 200a. The brazing filler ring 100a is sandwiched between the two metal weldments 200a and is arranged circumferentially around either metal weldment 200a. Further, the brazing filler ring is a copper-based brazing filler ring or a silver-based brazing filler ring. Further, in this embodiment, the fusion welding structure 10 of the brazing metal workpiece includes a high-frequency generator (not shown) and an induction copper tube 200. The high-frequency generator is electrically connected to the induction copper tube 200. The induction copper tube 200 is configured to spirally bend around the diameter of the induction copper tube 200 with a pitch equal to the diameter of the induction copper tube 200 to form a hot melt welding hole 101. The brazing ring 100a and the end of each metal weldment 200a near the brazing ring 100a are housed together in the hot melt welding hole 101, and the distance a between the peripheral wall of each metal weldment 200a and the hole wall of the hot melt welding hole 101 is at least 1.5mm.

[0036] The aforementioned fusion welding structure 10 for brazing metal workpieces allows the high-frequency generator to be combined with the induction copper tube 200. The induction copper tube 200 is configured to spirally bend around the diameter of the induction copper tube 200 with a pitch equal to the diameter of the induction copper tube 200 to form a hot melt welding hole 101. The brazing filler ring 100a and the end of each metal workpiece 200a near the brazing filler ring 100a are housed together in the hot melt welding hole 101, and the distance 'a' between the peripheral wall of each metal workpiece 200a and the hole wall of the hot melt welding hole 101 is at least 1.5 mm, meaning that resistance is directly applied to the brazing filler ring 100a. The contact surface between a and the end of each metal weldment 200a near the brazing ring 100a does not require pretreatment of the end of each metal weldment 200a near the brazing ring 100a. The edge effect can be used to concentrate the heating of the brazing ring 100a and the end of each metal weldment 200a near the brazing ring 100a, avoiding overall overheating of each metal weldment 200a. It also has a high energy conversion rate and can continuously heat melt to produce brazed metal workpieces 10a, which improves brazing efficiency and brazing welding stability.

[0037] Please refer to the following: Figures 1 to 5 In one embodiment, the distance a between the peripheral wall of each metal weldment 200a and the hole wall of the hot melt welding hole 101 is 1.5mm to 2.3mm, which further ensures a high energy conversion rate.

[0038] In one embodiment, the number of spiral turns of the induction copper tube is proportional to the maximum diameter of each metal workpiece. Further, when the maximum diameter of each metal workpiece is less than 50 mm, the number of spiral turns of the induction copper tube is 2 to 3. Further, when the maximum diameter of each metal workpiece is 50 mm to 70 mm, the number of spiral turns of the induction copper tube is 3 to 4. Further, when the maximum diameter of each metal workpiece is greater than 70 mm, the number of spiral turns of the induction copper tube is 3 to 4, further ensuring rapid heating and thermofusion welding between the brazing filler ring and the end of each metal workpiece near the brazing filler ring, thereby further improving brazing efficiency.

[0039] Please refer to the following: Figures 1 to 5 In one embodiment, the induction copper tube 200 is provided with a cooling through hole 102 extending along the length direction of the induction copper tube 200. The extension direction of the cooling through hole 102 is parallel to the length direction of the induction copper tube 200, and the cooling through hole 102 is used to introduce cooling water. Further, the diameter of the cooling through hole 102 is 5mm to 7mm. Further, the diameter of the induction copper tube 200 is 7.5mm to 8.5mm, ensuring rapid cooling operation of the induction copper tube 200.

[0040] Please refer to the following: Figures 1 to 5 In one embodiment, a high-temperature resistant glass fiber sleeve 200 is fitted onto the induction copper tube 200, and the induction copper tube 200 and the high-temperature resistant glass fiber sleeve 200 are spirally wound together to form a thermofusion welding hole 101. Further, the diameter of the high-temperature resistant glass fiber sleeve 200 is 9.5mm to 10mm. Furthermore, this design effectively achieves thermal insulation and heat loss suppression, significantly improves energy utilization, and also enables directional heat energy guidance, further improving heating efficiency and consequently, brazing efficiency.

[0041] Compared with the prior art, the present invention has at least the following advantages:

[0042] The fusion welding structure 10 of this invention for brazing metal workpieces combines a high-frequency generator with an induction copper tube 200. The induction copper tube 200 is configured to spirally bend around the diameter of the induction copper tube 200 with a pitch equal to the diameter of the induction copper tube 200 to form a hot melt welding hole 101. The brazing filler ring 100a and the end of each metal workpiece 200a near the brazing filler ring 100a are housed together in the hot melt welding hole 101, and the distance 'a' between the peripheral wall of each metal workpiece 200a and the hole wall of the hot melt welding hole 101 is at least 1.5 mm, meaning that resistance is directly applied to the brazing filler ring 100a. The contact surfaces of 00a and each metal weldment 200a near the end of the brazing ring 100a do not require pretreatment of the end of each metal weldment 200a near the brazing ring 100a. The edge effect can be used to concentrate the heating of the brazing ring 100a and the end of each metal weldment 200a near the brazing ring 100a, avoiding overall overheating of each metal weldment 200a. It also has a high energy conversion rate and can continuously heat melt to produce brazed metal workpieces 10a, which improves brazing efficiency and brazing welding stability.

[0043] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fusion welding structure for brazing metal workpieces, characterized in that, The brazing metal workpiece includes a brazing ring and two metal weldments, the brazing ring being sandwiched between the two metal weldments, and the brazing ring being arranged circumferentially around either of the metal weldments; The fusion welding structure includes a high-frequency generator and an induction copper tube. The high-frequency generator is electrically connected to the induction copper tube. The induction copper tube is spirally bent to form a hot melt welding hole. The pitch of the spiral bend is equal to the diameter of the induction copper tube. The brazing ring and the end of each metal weldment near the brazing ring are housed together at the hot melt welding hole, and the distance between the peripheral wall of each metal weldment and the hole wall of the hot melt welding hole is at least 1.5 mm.

2. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, The distance between the peripheral wall of each of the metal weldments and the wall of the hot melt weld hole is 1.5 mm to 2.3 mm.

3. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, The number of turns of the induction copper tube spiral is proportional to the maximum diameter of each of the metal weldments.

4. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, When the maximum diameter of each of the aforementioned metal weldments is less than 50 mm, the number of turns of the induction copper tube spiral bend is 2 to 3 turns; and / or, When the maximum diameter of each of the aforementioned metal weldments is 50mm to 70mm, the number of turns of the induction copper tube spiral bend is 3 to 4 turns; and / or, When the maximum diameter of each of the aforementioned metal weldments is greater than 70 mm, the number of turns of the induction copper tube spiral bend is 3 to 4.

5. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, The induction copper tube is provided with a cooling through hole extending along the length direction of the induction copper tube. The extension direction of the cooling through hole is parallel to the length direction of the induction copper tube, and the cooling through hole is used to introduce cooling water.

6. The fusion welding structure of the brazed metal workpiece according to claim 5, characterized in that, The diameter of the cooling through hole is 5mm to 7mm.

7. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, The diameter of the induction copper tube is 7.5mm to 8.5mm.

8. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, A high-temperature resistant glass fiber sleeve is fitted onto the induction copper tube, and the induction copper tube and the high-temperature resistant glass fiber sleeve are spirally wound together to form the hot melt welding hole.

9. The fusion welding structure of the brazed metal workpiece according to claim 8, characterized in that, The diameter of the high-temperature resistant glass fiber sleeve is 9.5mm to 10mm.

10. The fusion welding structure of the brazed metal workpiece according to claim 1, characterized in that, The solder ring is a copper-based solder ring or a silver-based solder ring.

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