CN219324900U

CN219324900U - Welding device for thin-wall copper aluminum pipe welded joint

Info

Publication number: CN219324900U
Application number: CN202320204654.0U
Authority: CN
Inventors: 范孝红; 兰勇
Original assignee: Wuhu Yongda Refrigeration Parts Co ltd
Current assignee: Wuhu Yongda Refrigeration Parts Co ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-07-11
Anticipated expiration: 2033-02-14

Abstract

The utility model discloses a welding device for a thin-wall copper-aluminum pipe welded joint, which relates to the field of copper pipe welding equipment and comprises a workbench, wherein a pushing cylinder is arranged on the side wall of the workbench, a push plate is arranged at the end part of an output shaft of the pushing cylinder, and a fixed electrode group is arranged on the workbench. According to the utility model, through the arrangement of the movable electrode group, the fixed electrode group, the high-pressure cylinder and the pushing cylinder, the copper pipe is supported in the welding process, the copper pipe is prevented from being unstable under high pressure, the heat is absorbed, the copper pipe is prevented from being excessively high in temperature to generate an aluminum eutectic structure in a welding seam, under the supporting effect of the core rod, the copper pipe extrudes the copper aluminum eutectic structure from the welding seam in the process of pushing the copper pipe into the aluminum pipe, and the difference of the copper and aluminum materials in hardness is utilized, namely, the oxide on the inner surface of the aluminum pipe is cleaned by utilizing the high-pressure effect when the copper pipe is inserted into the aluminum pipe, so that any assistance is avoided.

Description

Welding device for thin-wall copper aluminum pipe welded joint

Technical Field

The utility model relates to the field of copper pipe welding equipment, in particular to a welding device for a thin-wall copper-aluminum pipe welding joint.

Background

The present refrigeration industry uses a large amount of copper tubes, and the reduction of the manufacturing cost of copper to aluminum is an important subject. However, the thickness of the self-tube wall related to the refrigeration industry is mostly below 1.0 mm; because the copper pipe is difficult to replace by the aluminum pipe in the aspect of the production and processing of the refrigeration pipeline, the aluminum pipe is adopted to replace the copper pipe completely, so that a plurality of problems are brought.

Because the copper pipe is difficult to replace by the aluminum pipe in the aspect of the production and processing of the refrigeration pipeline, the aluminum pipe is adopted to replace the copper pipe completely, so that a plurality of problems are brought. The difference between the melting points of the copper pipe and the aluminum pipe is about 400 ℃, and because the inner surface of the aluminum pipe is provided with an oxide layer, in the welding of the thin-wall copper aluminum pipe, the two materials are difficult to realize direct chemical bond connection between two metal atoms, thereby producing copper-aluminum eutectic structures, and in some foreign utility models adopting a plug-in copper-aluminum welding method of high-frequency heating, the thickness of the copper-aluminum eutectic structures in welding seams is within 10 mu m, and the welding seams are considered to be acceptable to be composed of the copper-aluminum eutectic structures. However, practice proves that the copper-aluminum pipe welded joint has very small peeling strength due to the existence of copper-aluminum eutectic structures, and cracks are easy to occur in use.

Disclosure of Invention

Aiming at the technical problem that the prior art solution is too single, the technical scheme of the utility model is obviously different from the prior art solution, and the specific aim of the utility model is that: in order to solve the problems that the peeling strength is very small and cracks are easy to occur in use due to the existence of copper-aluminum eutectic structures in the aluminum pipe welding joint, the welding device for the thin-wall copper-aluminum pipe welding joint is provided.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a welding set for thin wall copper aluminum pipe welded joint, includes the workstation, the workstation lateral wall is provided with promotes the cylinder, the output shaft tip of promoting the cylinder is provided with the push pedal, be provided with fixed electrode group on the workstation, the side of fixed electrode group is provided with movable electrode group, still including the clamping assembly who is used for adapting to centre gripping all size core pipes, be provided with guide assembly on the workstation, guide assembly's lateral wall is provided with the centre gripping cylinder, all be provided with synchronous moving's high-pressure cylinder on movable electrode group and the fixed electrode group.

Preferably, the clamping assembly comprises a conical sleeve, six wedge blocks and six sliding grooves, wherein the conical sleeve is fixedly arranged at the end part of an output shaft of the clamping cylinder, six sliding grooves are formed in the inner side wall of the conical sleeve, and six wedge blocks are arranged in the corresponding sliding grooves in a conical sliding manner.

Preferably, six wedge block ends are each provided with a bevel.

Preferably, the guide assembly comprises four guide rods, two movable plates, two fixed plates and an L-shaped mounting plate, wherein the L-shaped mounting plate is arranged at the top of the workbench, two fixed plates are fixedly arranged on the side walls of the L-shaped mounting plate, four guide rods are fixedly arranged on the two fixed plates and the L-shaped mounting plate respectively at two ends, and two movable plates are slidably arranged on the four guide rods respectively.

Preferably, the push plate is arranged vertically, and the push plate is fixedly connected with the two movable plates.

Preferably, both the movable plates are fixedly connected with the side walls of the movable electrode group.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, through the arrangement of the movable electrode group, the fixed electrode group, the high-pressure cylinder and the pushing cylinder, the copper pipe is supported in the welding process, the copper pipe is prevented from being unstable under high pressure, the heat is absorbed, the copper pipe is prevented from being excessively high in temperature to generate an aluminum eutectic structure in a welding seam, under the supporting effect of the core rod, the copper pipe extrudes the copper aluminum eutectic structure from the welding seam in the process of pushing the copper pipe into the aluminum pipe, and the difference of the copper and aluminum materials in hardness is utilized, namely, the oxide on the inner surface of the aluminum pipe is cleaned by utilizing the high-pressure effect when the copper pipe is inserted into the aluminum pipe, so that any assistance is avoided.

The utility model can also heat the bonding area by electrifying while cleaning the aluminum pipe oxide, heat while pressurizing, reduce the copper-aluminum eutectic structure generation amount, improve the product quality and reduce the cracks of the welded product in the use process.

According to the utility model, the output shaft of the clamping cylinder stretches out to drive the conical sleeve to abut against the end part of the core rod, and the core rod abuts against the wedge-shaped block, so that the wedge-shaped block slides towards the bottom of the conical sleeve along the sliding groove, the interval between the wedge-shaped blocks is gradually reduced due to the arrangement of the wedge-shaped blocks, the clamping effect on the core rod with any size is realized, the adaptability is higher, manual intervention is not needed, and the operation is simple.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a clamping assembly according to the present utility model;

fig. 3 is a schematic view of the guide assembly structure of the present utility model.

In the figure: 1. a work table; 2. a pushing cylinder; 3. fixing the electrode group; 4. a movable electrode group; 5. a clamping cylinder; 6. a clamping assembly; 61. a conical sleeve; 62. wedge blocks; 63. a sliding groove; 7. a push plate; 8. a high-pressure cylinder; 9. a guide assembly; 91. a guide rod; 92. a movable plate; 93. a fixing plate; 94. an L-shaped mounting plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "configured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.

Referring to fig. 1-3, a welding device for a welding joint of a thin-wall copper aluminum pipe comprises a workbench 1, wherein a pushing cylinder 2 is arranged on the side wall of the workbench 1, a pushing plate 7 is arranged at the end part of an output shaft of the pushing cylinder 2, a fixed electrode group 3 is arranged on the workbench 1, a movable electrode group 4 is arranged on the side of the fixed electrode group 3, a clamping assembly 6 for clamping all size core pipes is also arranged on the side of the fixed electrode group 3, a clamping cylinder 5 is arranged on the side wall of the guiding assembly 9, a guiding assembly 9 is arranged on the workbench 1, and high-pressure cylinders 8 capable of synchronously moving are arranged on the movable electrode group 4 and the fixed electrode group 3; firstly, an aluminum pipe is placed on a fixed electrode group 3, the aluminum pipe is fixed through a high-pressure cylinder 8, then a core rod is inserted into the copper pipe, then the copper pipe is placed on a movable electrode group 4, the copper pipe is fixed through the high-pressure cylinder 8, at the same time, an output shaft of a clamping cylinder 5 stretches out to drive a clamping assembly 6 to stretch out synchronously, the clamping assembly 6 is abutted against the end part of the core rod to clamp the core rod, then a pushing plate 7 is pushed by a pushing cylinder 2 to drive the movable electrode group 4 to slide along a guide rail of a guide assembly 9 towards the fixed electrode group 3, then the difference of copper and aluminum materials in hardness is utilized, oxide on the inner surface of the aluminum pipe is cleaned by means of the high-pressure effect of the copper pipe when the copper pipe is inserted into the aluminum pipe, meanwhile, the conical joint surface is heated by electrifying, the copper pipe is heated while being pressurized, the copper pipe is continuously moved towards the inside of the aluminum pipe in the process, the generated copper aluminum compound (eutectic structure) is extruded under high pressure, the influence of the joint caused by the brittle structure is avoided, a welded joint of the copper and aluminum combination pipeline is formed, the welding joint is immediately powered off, the clamping cylinder 5 is repeatedly operated, and the joint inner hole is continuously expanded, so that the joint is finished.

Specifically, the clamping assembly 6 includes a conical sleeve 61, six wedge blocks 62 and six sliding grooves 63, the conical sleeve 61 is fixedly arranged at the end of the output shaft of the pushing cylinder 2, six sliding grooves 63 are arranged on the inner side wall of the conical sleeve 61, and six wedge blocks 62 are arranged in the corresponding sliding grooves 63 in a conical sliding manner. The end part of the conical sleeve 61 which is driven to abut against the core rod is stretched out through the output shaft of the clamping cylinder 5, the core rod abuts against the wedge block 62, the wedge block 62 slides towards the bottom of the conical sleeve 61 along the sliding groove 63, the distance between the wedge blocks 62 is gradually reduced due to the arrangement of the wedge block 62, the core rod clamping effect on any size is achieved, the adaptability is stronger, manual intervention is not needed, and the operation is simple.

Specifically, the six wedge blocks 62 are each provided with a slope at the end thereof.

Specifically, the guide assembly 9 includes four guide rods 91, two movable plates 92, two fixing plates 93 and an L-shaped mounting plate 94, the L-shaped mounting plate 94 is disposed at the top of the workbench 1, two fixing plates 93 are fixedly disposed on the side walls of the L-shaped mounting plate 94, four ends of the guide rods 91 are respectively fixedly disposed on the two fixing plates 93 and the L-shaped mounting plate 94, and two movable plates 92 are respectively slidably disposed on the four guide rods 91. The movable electrode group 4 can ensure the welding precision of the copper-aluminum pipe joint when moving through the arrangement of the guide rod 91 and the movable plate 92.

Specifically, the push plate 7 is vertically disposed, and the push plate 7 is fixedly connected with two movable plates 92.

Specifically, both the movable plates 92 are fixedly connected to the side walls of the movable electrode set 4.

The working principle is that firstly, an aluminum pipe is placed on a fixed electrode group 3, the aluminum pipe is fixed through a high-pressure cylinder 8, then a core rod is inserted into a copper pipe, then the copper pipe is placed on a movable electrode group 4, the copper pipe is fixed through the high-pressure cylinder 8, and at the moment, an output shaft of a clamping cylinder 5 stretches out to drive a clamping assembly 6 to stretch out synchronously, the clamping assembly 6 is abutted against the end part of the core rod, the core rod is clamped, then a pushing plate 7 is pushed by a pushing cylinder 2 to drive the movable electrode group 4 to slide along a guide rod 91 towards the direction of the fixed electrode group 3, then the difference of copper and aluminum materials in hardness is utilized, oxide on the inner surface of the aluminum pipe is cleaned by means of the high-pressure effect of the copper pipe when the copper pipe is inserted into the aluminum pipe, the conical joint surface is heated by electrifying simultaneously, the copper pipe is extruded under the pressure while being heated, the copper pipe continuously moves towards the inside of the aluminum pipe, the generated copper and aluminum compound (eutectic structure) is extruded under high pressure, the influence of the brittle structure on the joint is avoided, a welded joint of a copper and aluminum combined pipeline is formed, after the welding is powered off, the clamping cylinder 5 immediately works back and forth, and the joint inner hole is continuously expanded, and the final processing of the joint is completed.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a welding set for thin wall copper aluminum pipe welded joint, includes workstation (1), workstation (1) lateral wall is provided with promotes cylinder (2), the output shaft tip that promotes cylinder (2) is provided with push pedal (7), be provided with fixed electrode group (3) on workstation (1), the side of fixed electrode group (3) is provided with movable electrode group (4), its characterized in that: still including being used for adapting to centre gripping all size core pipe centre gripping subassembly (6), be provided with guide assembly (9) on workstation (1), the lateral wall of guide assembly (9) is provided with centre gripping cylinder (5), all be provided with synchronous moving high-pressure cylinder (8) on movable electrode group (4) and the fixed electrode group (3).

2. A welding apparatus for a thin-walled copper aluminum pipe welded joint as defined in claim 1 wherein: the clamping assembly (6) comprises a conical sleeve (61), six wedge blocks (62) and six sliding grooves (63), wherein the conical sleeve (61) is fixedly arranged at the end part of an output shaft of the clamping cylinder (5), six sliding grooves (63) are formed in the inner side wall of the conical sleeve (61), and six wedge blocks (62) are arranged in the corresponding sliding grooves (63) in a conical sliding mode.

3. A welding apparatus for a thin-walled copper aluminum pipe welded joint as defined in claim 2 wherein: inclined planes are arranged at the end parts of the six wedge-shaped blocks (62).

4. A welding apparatus for a thin-walled copper aluminum pipe welded joint as defined in claim 3, wherein: the guide assembly (9) comprises four guide rods (91), two movable plates (92), two fixing plates (93) and an L-shaped mounting plate (94), wherein the L-shaped mounting plate (94) is arranged at the top of the workbench (1), the two fixing plates (93) are fixedly arranged on the side walls of the L-shaped mounting plate (94), the four guide rods (91) are respectively fixedly arranged on the two fixing plates (93) and the L-shaped mounting plate (94), and the two movable plates (92) are respectively arranged on the four guide rods (91) in a sliding mode.

5. A welding apparatus for a thin-walled copper aluminum pipe welded joint as defined in claim 4 wherein: the push plate (7) is vertically arranged, and the push plate (7) is fixedly connected with the two movable plates (92).

6. A welding apparatus for a thin-walled copper aluminum pipe welded joint as defined in claim 5 wherein: the two movable plates (92) are fixedly connected with the side walls of the movable electrode groups (4).